204results about How to "Improve adjustment quality" patented technology

The invention discloses an all-process control method for the main steam temperature of a utility boiler. The all-process control method comprises the following steps: firstly, partitioning the typical working condition points of the operation of the utility boiler; secondly, testing the main steam temperature mathematical models at the typical working condition points; thirdly, caculating the optimal values of PID (Proportion Integration Differentiation) adjustable parameters at the typical working condition points; fourthly, utilizing a piecewise linear function module in a DCS (Decentralized Control System) to achieve control logical configuration; fifthly, realizing the approximate optimal control of the main steam temperature at any working condition points in the DCS. The all-process control method for the main steam temperature of the utility boiler has the benefits that automatic dispatching of the optimal values of PID adjustable parameters of the inner loop and the outer loop is guaranteed when the main steam temperature system of a thermal power generating unit is within the full-load range of the unit operation, the main steam temperature adjustment quality is greatly improved, and the over-temperature probability of the unit under the condition of great load changes is lowered.

The invention belongs to the technical field of energy conservation of a central air-conditioning system, and particularly relates to a control method for optimizing cooling water flow of total energy consumption of a refrigeration apparatus and a cooling water pump. The method comprises the following steps: signal acquisition, signal treatment and conversion, primary control operation, secondary control operation, controlled quantity output and control of task execution. in the method, partial derivative of total power of the refrigeration apparatus and the cooling water pump to condensing pressure is taken as a parameter that represents whether the total power is in an approximately optimal sate or not, and the partial derivative of the total power of the refrigeration apparatus and the cooling water pump to the condensing pressure is calculate online by acquiring the parameter of the condensing pressure and parameters of temperature and flow rate of cooling water, and the flow rate of the cooling water is controlled according to the value of the partial derivative, thereby realizing that the total power of the refrigeration apparatus and the cooling water pump approaches minimum, at the time, the value of the partial derivative is close to zero, so that energy conservation effect of variable flow of the cooling water can be played to the utmost extent.

The invention discloses an automatic control method of thermal-power-unit SCR denitration ammonia spraying. The automatic control method includes the steps that the smoke flow and SCR-inlet-nitric-oxide concentration are obtained; the smoke flow is multiplied by the SCR-inlet-nitric-oxide concentration, and the basic-nitric-oxide content in smoke is obtained; the basic-nitric-oxide content is multiplied by the set denitration efficiency, and the basic-liquid-ammonia demanded quantity is obtained; the denitration-outlet-nitric-oxide content is obtained, the denitration-outlet-nitric-oxide content is compared with a denitration-outlet-nitric-oxide set value, an initial correction factor is obtained, a final correction factor is obtained in cooperation with further correction, and the liquid-ammonia demanded quantity is corrected. As the denitration-outlet-nitric-oxide set value is introduced, the denitration-outlet-nitric-oxide concentration serves as a final control target, the control target is specific, physical inspection and operation intervention intensity of operational persons are reduced, and the operational persons are liberated out of busy working. The invention also discloses an automatic control system of thermal-power-unit SCR denitration ammonia spraying.

The invention relates to the technical field of parameter optimization of a PID (proportional-integral-derivative) controller, in particular to a method of parameter optimization of a speed regulating system of a water turbine based on satisfying control, belonging to the technical field of parameter optimization of the PID controller; the invention collects the performance indexes of rising time, overshoot, adjusting time and steady state error which are responded by the water turbine system according to the data which is required by the specific performance indexes of the water turbine system; then a satisfaction function of all the performance indexes can be obtained; the actual operation results of the system are taken as the standard to design and optimize the parameter of the controller; a genetic algorithm model which takes the total satisfaction function of the system performance indexes as fitness is established; the method of parameter optimization of the speed regulating system of the water turbine based on satisfying control is proposed by the simulation, contrast and analysis of three parameter optimization design methods and the total satisfaction meets the PID parameter which is required by the design; although the system designed by the invention does not have the necessity of operating in the optimized working condition, the actual requirement can be met better, and the cost of optimization can be reduced greatly, therefore, the invention has practicability and is easy to realize.

The invention relates to a unit plant coordination control method and a system, wherein the method comprises the steps of: subtracting an actual main steam pressure value by a main steam pressure set value to obtain a main steam pressure control deviation; subtracting an actual plant load value by a speed-limited plant load command value to obtain a load control deviation; determining a load change rate correction coefficient according to the main steam pressure control deviation and the load control deviation; and keeping a boiler dynamic acceleration signal invariable, and correcting the load change rate set value in real time according to the load change rate correction coefficient. The method can reduce the fluctuation amplitude of plant operation parameters to improve the adjusting quality of a CCS system under various operation working conditions so as to achieve the purpose of safe and economical plant operation.

The present invention is limit load regulating method and apparatus for hydraulic bull dozer. The present invention features that by means of connecting the throttle valve sensor, the engine rotation speed sensor, walking motor rotation speed sensor and motor proportion valve to the micro controller (MC), connecting the engine to variable displacement oil pump and MC, the calculation in MC of the difference between practical rotation speed and the set value of the engine and the motor based on the signals from the sensors, the data processing and PID operation, the limit load regulating apparatus regulates the current of the electric proportion valve in the variable displacement oil pump and the current of the electric proportion valve in the motor to maintain the rotation speed of the engine in the constant value. The present invention makes the hydraulic bull dozer operate in optimal rotation speed with less fluctuation in high response speed.

The invention provides a digital comprehensive regulation device for hydroelectric generating sets, and a control method thereof. The device comprises a controller, wherein the controller is respectively connected with a Hall current sensor, a Hall voltage sensor, a current conditioning circuit, a voltage conditioning circuit A and a voltage conditioning circuit B through analog input interfaces, and is respectively connected with a shaping circuit A, a shaping circuit B, a circuit-breaker auxiliary contact and a shaping circuit C through high-speed digital input interface; the controller is respectively connected with a pulse amplification circuit and a circuit breaker through high-speed digital output interfaces; and the controller is also respectively connected with a digital mixing module and an analog input module. The device can control and regulate the dynamic performances of generating sets by measuring and calculating the parameters of power networks and generators. The device integrates synchronization, speed regulation and excitation, has the characteristics of high control performance, short response time, programming easiness, debugging convenience, high execution speed and the like, and is particularly applicable to the comprehensive control over medium / small-size hydroelectric generating sets.

The invention discloses an automatic method for water level of reservoir, which is indicated measuring the current water level of reservoir with water level pressure transmitter, calculating the deviation factor triangle H of water level measuring value with the specified value, synchronously calculating the rising speed of water level S and taking into the PID algorithm, obtaining the variation jaw opening triangle H of valve, and obtaining the target jaw opening L by adding the original jaw opening L0. The invention implements the presetting of PID parameter, calculating and the process for mathematical model with PLC, and synchronously controls the jaw opening of valve with the output of PLC. The positive effect of this invention is indicated as convenient measuring, excellent control quality, and quickly and automatically controlling the water level in a specified scope in the condition of fewer times of valve agency.

The invention discloses a multi-model disturbance estimation predictive-control method for superheated steam temperature of a thermal power generating unit. According to the method, a superheated steam temperature system serves a controlled object, cooling spray water flow serves as system control input, superheated steam temperature serves as system output, a plurality of disturbance models are established to respectively expand the system state on the basis of a controlled object state space model, and a disturbance model set is formed. Sub-models in the disturbance model set are subjected to weighted averaging, thus the influence of immeasurable disturbance upon the system output is fitted. According to the concept of predictive control, optimization solution is performed once for each step so that optimal system controlled input is obtained. Compared with common predictive control algorithms, the method has the advantages that immeasurable disturbance can be inhibited more effectively, and steam temperature is kept around a set value stably; when no immeasurable disturbance occurs, the method is as effective as the common predictive control algorithms, and tracking regulation performance is fine.

The invention relates to a dual clutch transmission, especially of a motor vehicle, comprising a hydraulic circuit (1) for cooling the dual clutch transmission, said hydraulic circuit (1) comprising at least one pump (7, 9) for delivering a hydraulic fluid flow, at least one cooler (183) for cooling the hydraulic fluid flow, and a volume control valve (185) for adjusting the hydraulic fluid flow for at least one cooling system (221, 229) which is associated with clutches (K1, K2) of the dual clutch transmission. Said volume control valve (185) is designed such that it supplies the hydraulic fluid flow to a first cooling system (221), which is associated with a first one of the clutches (K1), in a first switching state and to a second cooling system (229), which is associated with a second one of the clutches (K2), in at least one second switching state.

The invention provides a method for automatically controlling a motor-driven feed-water pump. The method comprises the following steps: reading the actual rotating speed value and instruction value of the motor-driven feed-water pump; processing the actual rotating speed value of the motor-driven feed-water pump on a non-linear basis, and carrying out the subtraction operation on the processed actual rotating speed value and the instruction value of the motor-driven feed-water pump, so as to obtain the deviation value of the two values; or alternatively, processing the instruction value of the motor-driven feed-water pump on a non-linear basis, and carrying out the subtraction operation on the processed instruction value and the actual rotating speed value of the motor-driven feed-water pump, so as to obtain the deviation value of the two values; and processing the deviation value by carrying out the scaling operation, integral operation and differential regulation operation, and controlling the opening degree of a scoop tube of an electro-hydraulic coupler of the motor-driven feed-water pump by the processed deviation value. The invention can effectively regulate the rotating speed of the motor-driven feed-water pump, avoid scrambling for water when the motor-driven feed-water pump and turbine-driven feed-water pump are in parallel operation and improve the regulation quality and service efficiency of the automatic feed-water regulating system. The invention further discloses a system for automatically controlling the motor-driven feed-water pump.

An energy balance-based control method of main steam pressure of a supercritical CFB (circulating fluidized bed) boiler includes the steps: S1, after a main steam pressure deviation signal P<T>-P<TS> of a unit is regulated by a PID (proportion integration differentiation) regulator, a signal A is output; S2: a steam turbine demanded heat signal is acquired through a steam turbine energy demand model; S3, a heat signal provided by boiler energy is acquired through an instant carbon mechanism model; S4, subtracting the steam turbine demanded heat signal E<R> by the heat signal E provided by boiler energy is performed, regulating is performed with the PID regulator, and a signal C is output; S5, after subjected to time differentiation, the steam turbine demanded heat signal E<R> is multiplied by a proportional gain k so as to obtain an output signal B, and a sum of the signals B, A and C is output to a boiler master controller; S6, coal feed is regulated according to master control output of a boiler so as to control the main steam pressure. The method has the advantages that regulating quality of the unit can be improved, stability of a main steam pressure control system of the supercritical CFB boiler is improved and ability to respond to load response of the unit is satisfied.

The invention relates to a method for operating a wheel slip control apparatus of a vehicle, including determining wheel speeds (Vfl_C, Vfr_C, Vrr_C, Vrl_C) of wheels of the vehicle as input variables for the wheel slip control apparatus, said wheel speeds being compensated for in terms of wheel speed differences during travel around curves, wherein: a) a neutral-steering, understeering or oversteering driving condition of the vehicle is determined from the driving characteristics of said vehicle during travel around curves; b) based on the determined neutral-steering, understeering or oversteering driving condition of said vehicle, either the reference yaw rate (omegaz_ ref) or the actual yaw rate (omegaz_meas) is used for calculating a curve radius (Rra_ref or Rra_meas) related to a selected point on said vehicle; c) wheel-related curve radii (Rrl, Rrr, Rfl, Rfr) for at least some of said wheels of said vehicle are determined from said curve radius (Rra_ref or Rra_meas) related to the selected point; d) reference factors (kfl, kfr, krl, krr) are determined from said wheel-related curve radii (Rrl, Rrr, Rfl, Rfr) and a common reference curve radius (Rra) for the at least some of said wheels of said vehicle; e) the compensated wheel speeds (Vfl_C, Vfr_C, Vrr_C, Vrl_C) are determined in each case from said reference factors (kfl, kfr, krl, krr) and measured wheel speeds (Vrl, Vrr, Vfl, Vfr) for the at least some of said wheels of said vehicle, and f) for the at least some of said wheels of said vehicle said compensated wheel speeds (Vfl_C, Vfr_C, Vrr_C, Vrl_C) are used as input variables for said wheel slip control apparatus.

The invention discloses a rear adjustable three-hole composite type waterproof hammer air group valve. The air group valve is integrally or separately arranged on a liquid conveying pipeline or a container system, a high-speed exhaust hole of the air group valve can be adjusted and controlled, is arranged alone, and is generally smaller than suction holes, the high-speed exhaust hole and the high-speed suction holes are formed separately and are not shared for use, independent model selection and adjustment can be conducted, the requirements of high-speed exhaust and high-speed gas suction for two different quantities of flow or two different diameters or two proportions are met, and meanwhile two built-in type gas bags are formed quite ingeniously. The group valve combines independent intermediate-speed exhaust, independent high-speed gas suction and trace amount exhaust, and has a dozen of functions, namely, the independent intermediate-speed exhaust function, the independent high-speed gas suction function, the trace amount exhaust function, the function of a high-suction and intermediate-exhaust waterproof hammer, the function of a high-suction and trace-exhaust waterproof hammer, the function of a built-in gas bag waterproof hammer, the built-in gas bag anti-freezing function, the function of a rear adjusting control valve and the function of monitoring the hole pressure difference and the total pressure difference on site in the empty pipe liquid filling process through two pressure meters. The various ventilation and safety protection requirements of a liquid path system can be met.

The invention relates to a thermal power station primary steam temperature control system and control method thereof. The system according to the method comprises a primary PID controller and a secondary PID controller. The method is characterized by comprising the following steps that (1) a preset value is inputted to the primary PID controller; and (2) a primary steam temperature measured value is compared with the primary PID controller preset value, and the secondary PID controller takes the output value of the primary PID controller as the preset value when the deviation is within the range of the set value. According to the primary steam temperature adjusting method, the preset value of the primary PID controller is set, and segmented control and adjustment are performed on the difference value of the primary steam temperature measured value and the primary PID controller preset value so that the quality of primary steam temperature control and adjustment can be greatly enhanced, the whole process of primary steam temperature automatic adjustment under the unvarying condition can be truly realized, and the excellent adjustment quality can be maintained in the automatic adjustment process.

The invention discloses a main steam temperature control system and method for a heat-engine plant based on an event-triggered mechanism. The control system comprises an outer ring prediction control loop and an inner ring PID control loop, wherein the inner ring PID control loop comprises an auxiliary detecting transducer, an auxiliary controller, an actuator and an attemperator, which are connected with one another in sequence; the outer ring prediction control loop comprises a main steam temperature object, a main detecting transducer, a main controller and the whole inner ring PID control loop, which are connected with one another in sequence; the main controller comprises a reference trajectory introducer, an online corrector, an event trigger, a predicting model device, a comparator and an optimization calculator; the event trigger can screen input signals and determine whether the control signal at the current moment can be sent to the actuator or not according to judgment on event triggering conditions. The main steam temperature control system disclosed by the invention is based on the event-triggered mechanism and only sends signals meeting the conditions without affecting the system stability, so as to reduce the network transmission pressure and prolong the system life.

The invention relates to an optimal control method for a 300MW unit to effectively stabilize temperature of main steam. The method includes the steps that firstly, difference value calculation is performed on the temperature of the main steam and a set temperature value of the main steam to obtain a difference value A, and TI-T2=A, wherein T1 is the temperature of the main steam, and T2 is the set temperature value of the main steam; secondly, the function relationship B=F(A) between the difference value A and flow B of desuperheating water is determined, the determining method of the function relationship includes the step that the accumulation amount and the transient time of the flow of the desuperheating water needed by the 300MW unit under certain loads are specifically recorded; thirdly, the relationship between the flow B of the desuperheating water and an opening degree C of an adjusting valve of the desuperheating water is determined; fourthly, the difference value A, the flow B of the desuperheating water, a difference P3 between pressure of the desuperheating water and pressure of superheating steam, and the opening degree C of the adjusting valve correspond to one another one to one so that optimal control over the desuperheating water can be achieved. According to the method, the adjusting quality and the energy utilizing rate are improved, the effect is obvious, and the method can be applied to various desuperheating control technologies and is wide in application market.

The invention discloses an SCR denitrification control method based on variable-constraint multi-model prediction control. The method is implemented by combining a multi-model prediction control algorithm, an intelligent model weighing algorithm and variable constraint conditions. The method comprises the following steps that 1, a precise NOx prediction model is obtained through the intelligent model weighing algorithm; 2, the optimal real-time ammonia demand is calculated by beans of continuous rolling optimization of the multi-model prediction control algorithm and the constraint conditions changing by following the working conditions. According to the method, the conflict generated between the model precision and the control algorithm when an existing prediction control strategy is applied in an SCR denitrification system is solved; compared with a traditional simple multi-linear-model linear weighing method, the model precision of the algorithm is improved; traditional immobile constraint conditions are changed into the variable constraint conditions changing by following the working conditions, constraint adjustment is more accurate, therefore, the computing burden of a resolution control instruction is reduced, a project is easy to implement, the large lag characteristic of the SCR system is overcome, and the NOx concentration regulation quality is significantly improved.

The present invention discloses a preferred method of a water turbine adjustment system control parameter to carry out preferred selection of a PID control parameter in a water turbine adjustment system. A model is established according to the water turbine adjustment system, then a target function with a PID controller control parameter as a preferred variation is established according to a simulation system, and the preferred method designed by the invention is used to solve the target function to obtain an optimal PID control parameter. According to the preferred method of the water turbine adjustment system control parameter, a novel heuristic optimization algorithm is used to optimize the target function, a better target function value can be searched, and an obtained solution represents a better PID control parameter. According to the better PID control parameter, the frequency deviation of the water turbine adjustment system is small, the adjustment speed is fast, a system response curve is smooth, and the system adjustment quality is high.

The invention discloses a constant-light control system based on a fuzzy algorithm. The system comprises a photoelectric conversion signal module, an A / D conversion module, a digital filter module, a control signal output module, a light source module and an intelligent control module. According to the constant-light control system, a modern fuzzy technique and a digital signal processing technique are adopted, and illuminance of lighting environment is adjusted to a certain set illuminance value in a self-adaptation mode; a filter algorithm for collecting an illumination signal is used, wrong output caused by external disturbance cannot occur, and anti-disturbance performance is improved; a fuzzy intelligent PID adjustment algorithm is adopted, adjustment precision is improved, continuous and smooth adjustment can be carried out in an adjustment range, the adjustment step pitch is small, flicker and jumping do not exist, and high adjustment quality is achieved; the constant-light control system is in a single-piece design, all functional modules are integrated in a chip, the constant-light control system has the advantages of being simple in structure, low in cost and power consumption, small in size and high in reliability and luminous efficacy of a light source and the energy-saving effect can reach the best state.

The invention discloses a boiler main steam temperature control method with frequent fluctuation of an AGC load instruction of a power grid, and belongs to the technical field of boiler main steam temperature control. According to the method, the variation trend of the main steam temperature of a boiler and the difference between the measured value of the main steam temperature of the boiler and the set value of the main steam temperature are comprehensively judged and controlled in advance through a main steam temperature super-differential feedforward control loop; and the desuperheating water jet control logic circuit for preventing the main steam temperature from overshooting is used for working conditions of frequent fluctuation of the AGC load instruction of the power grid, and the main steam temperature is controlled within a set range. According to the method, the main steam temperature regulation quality can be greatly improved, the fluctuation range of the main steam temperature of the boiler is reduced, and the unit efficiency is improved; after using this control scheme, the main steam temperature fluctuation range is reduced by 3-5 DEG C than before; and with the continuous development and maturity of the main steam temperature control technology, the foundation can be laid for improving the safe, stable and efficient economic operation of the unit and achieving the long-term goal of energy-saving optimization.

The invention discloses an active-disturbance-rejection controller, system and method for main steam temperature cascade of a thermal power plant. The controller comprises a tracking differentiator, an expansion state observer, nonlinear state error feedback and three operation units. The system comprises a subsidiary controller, an executor, a subsidiary controlled object, a main controlled object, a subsidiary transmitter and a main transmitter. According to the method, the influence of disturbance factors such as loads and injection flow can be effectively overcome through the specific disturbance compensation effect of the active-disturbance-rejection control system. The active-disturbance-rejection controller, system and method integrate the advantage of cascade control and the advantage of network control and further have the advantage of the active-disturbance-rejection control system; the active-disturbance-rejection controller, system and method have great advantages in the aspect of model disturbance estimation, and with the help of the nonlinear error control law specifically for nonlinear objects, good control precision is still achieved even if control conditions are quite severe, and the adjustment quality is improved; and accordingly, the requirements of practical production are better met.

The invention discloses a parallel operation axial flow primary fan automatic regulating method and an automatic regulating device. According to the method, a fan current monitoring and comparison module is added on a fan pneumatic blade automatic control module, the current of more than two fans is firstly judged during fan air quantity regulation and control, and the air quantity regulation sequence of a fan is determined according to fan current quantity; the preferential increase of the movable blade opening degree of the fan with low current is used as an air quantity increase regulation condition; the preferential decrease of the movable blade opening degree of the fan with high current is used as an air quantity decrease regulation condition. The optimized control strategy is adopted, the headwind and stall problem of the primary fan is effectively avoided, and the automatic regulation quality of an axial flow primary fan is greatly improved, so guarantee is provided for boiler burning stability.

The invention discloses an optimal selection method for new energy mixed system control parameters, and is used for carrying out optimal selection on PID control parameters in a new energy mixed system. A model is established according to the new energy mixed system; and then an objective function with PID controller input and output parameters as state variables is established according to a simulation system; and optimal PID control parameters are obtained by means of solving the objective function through utilization of the optimal selection method designed in the invention. The optimal selection method for new energy mixed system control parameters of the invention employs a novel heuristic optimization algorithm to optimize the objective function, and better objective function values can be searched, so that obtained solutions represent better PID control parameters. The better PID control parameters enable the frequency offset of the new energy mixed system to be smaller, the adjusting speed to be faster, the system response curve to be more smooth and the system adjusting quality to be higher.

The invention discloses an ultra-supercritical secondary reheating generator unit reheating steam temperature compound control strategy. The strategy comprises smoke recycling and control over primary and secondary reheater smoke adjusting baffles. The smoke recycling control input is the sum of the primary reheating steam temperature deviation and secondary reheating steam temperature deviation, the output is superposed with the load predication link and the temperature average differentiation link after water spraying, and a smoke recycling command is formed finally. The reheater smoke adjusting baffle control input comes from the difference between the primary reheating steam temperature deviation and secondary reheating steam temperature deviation, the output is superposed with the load predication link and the temperature average differentiation link after water spraying, the primary and secondary reheater side smoke baffles are controlled correspondingly, two control signals and the smoke recycling command are subjected to weighted summing so that disturbance of the smoke recycling adjusting process to the reheating smoke baffles can be eliminated. According to the ultra-supercritical secondary reheating generator unit reheating steam temperature compound control strategy, the smoke recycling rate and adjustment of the reheating smoke baffles are subjected to compound control, and the load predication link is adopted for improving the adjusting quality of the control strategy.

The invention discloses a flue gas desulfurization method and a flue gas desulfurization device. The flue gas desulfurization method comprises the following steps: spraying newly supplemented desulfurizing agent slurry into a desulfurizing tower through the highest spray level of the desulfurizing tower; controlling the sulfur dioxide concentration of the flue gas at the outlet of the desulfurizing tower through adjusting the concentration and / or the spray flow of the newly supplemented desulfurizing agent slurry. According to the flue gas desulfurization method, the newly supplemented desulfurizing agent slurry is sprayed into the desulfurizing tower through the highest spray level of the desulfurizing tower, and the characteristic that the capability of the newly supplemented desulfurizing agent slurry to absorb low-concentration sulfur dioxide in flue gas is far higher than that of a circulating desulfurization slurry with relatively low pH value as the pH value of the newly supplemented desulfurizing agent slurry is far higher than that of the circulating desulfurization slurry is fully utilized, so that the sulfur dioxide concentration of the flue gas at the outlet of the desulfurizing tower can be quickly adjusted; the method directly responses to the target concentration value of the flue gas at the outlet of the desulfurizing tower, and has the advantages of being high in response speed, high in adjustment precision and good in adjustment quality.

The invention discloses a direct energy balance coordinated control system used for a large circulating fluid bed unit, comprising a boiler master controller, a fuel master controller and a steam turbine master controller, wherein the boiler master controller adopts steam drum heat signals with second-order differentials and dynamic and static feed-forward signals; the dynamic and static feed-forward signals comprise static feed-forward signals LSff of unit load instructions to boiler fuel, dynamic feed-forward signals LDff of the unit load instructions to boiler fuel, dynamic feed-forward signals PDff of unit pressure to boiler fuel, dynamic feed-forward VtDf of a bed temperature change rate to boiler master control and dynamic and static feed-forward of load instructions to primary air quantity; the boiler master controller adopts PID variable parameter control according to different load segments; and the fuel master controller adopts a coal quality corrective control loop. The system has the advantages of improving the coordinated control ability of the circulating fluid bed unit, and solving the problems of great fluctuation of main steam pressure and low speed of load response of the unit under a coordinated control mode.

The invention discloses a soft measuring apparatus for procedure parameters of copper-matte converting and a soft measuring method using the same, relating to a measuring apparatus, in particular to a soft measuring apparatus for procedure parameters of copper-matte converting and a measuring method using the same based on neural network curve fitting and mechanism analysis. The invention provides the soft measuring apparatus for the following procedure parameters of the copper-matte converting in copper-matte converting process: phase composition, elementary composition and the copper-matte converting of furnace temperature and the soft measuring method using the same. The soft measuring apparatus is provided with an intelligent apparatus, a data storage device and an upper computer, wherein the intelligent apparatus is provided with a sensor, a server, a replicating machine, an on-line display and at least one workstation; the data storage device connected with the intelligent apparatus is provided with a database and a replicating machine; and the upper computer is a soft measuring processor, which is connected with the intelligent instrument and the data storage device.

The invention discloses a coal-fired unit coordination control method and system. The method comprises the steps that proportional adjustment is conducted according to a boiler heat signal and the current fuel quantity, and a proportional adjustment result is obtained; integral adjustment is conducted according to a coal-fired unit load instruction and a pressure deviation signal, and an integraladjustment result is obtained; boiler coordination control is carried out according to a boiler heat signal, a turbine energy demand signal, the proportional adjustment result and the integral adjustment result; a variable load rate correction coefficient is determined according to the actual value of the main steam pressure of a coal-fired unit and the sliding pressure instruction of the coal-fired unit; the variable load rate set value is corrected according to the variable load rate correction coefficient to obtain a corrected variable load rate; a coal-fired unit load regulator set value is determined according to the corrected variable load rate and the coal-fired unit load instruction; machine coordination control is carried out according to the set value of the load regulator of thecoal-fired unit and the actual load. The method has the advantages of being capable of guaranteeing deep regulation of the load in the load changing process of the coal-fired unit and improving regulation quality.

The invention provides a main steam temperature reducing and water spraying control method and system for a power station boiler, and the method comprises the steps: carrying out the preprocessing ofa main steam temperature deviation, and obtaining a main steam temperature deviation after preprocessing; taking the main steam temperature deviation as an input variable after preprocessing, and combining a differential algorithm with the quick return characteristic to calculate and obtain main control output; subtracting the leading temperature by the value of the main control output to obtain aleading temperature control deviation; enabling a sub-modulation PI controller to output the subcontrol control output to a temperature reducing and water spraying adjustment valve for control through the leading temperature control deviation, and monitoring the leading temperature control deviation; triggering a tracking enabling signal to enable the output of the sub-modulation PI controller tobe forced to be unchanged if the leading temperature control deviation exceeds a preset threshold and the state that the leading temperature control deviation is greater than the preset threshold remains for a preset time period; and setting the main control output of a main modulation PID controller as a leading temperature value. The method improves the response sped of the system adjustment, and can remarkably improve the adjustment quality of the system.