39results about How to "Avoid loss of power generation" patented technology

The invention belongs to the field of thermoelectricity technologies and relates to a novel heat supply steam turbine system and a regulation method thereof. The novel heat supply steam turbine system consists of a novel heat supply steam turbine generator unit, an electric power plant cold side and a heating load coupling and regulating system, wherein a steam turbine high-pressure cylinder, a steam turbine medium-pressure cylinder, a generator, a steam turbine I low-pressure cylinder and a steam turbine II low-pressure cylinder are coaxially arranged in the novel heat supply steam turbine generator unit. At a heating period, the unit operates at low vacuum and can meet the requirements of low-temperature heat network water at 40-80 DEG C for heat source parameters on the premise that the efficient and safe power generation is realized, and the regulation is carried out by using a cooling tower of the heating load coupling and regulating system when a heat load changes, so that the task of exhaust steam condensation of steam turbines is completed while the supply and demand of heat are balanced; and at a non-heating period, the steam turbine II low-pressure cylinder participates in the driving of the generator so as to generate power, the unit operates at pure condensation, and then, the power loss of the unit at the non-heating period is avoided. The novel heat supply steam turbine system and the regulation method of the novel heat supply steam turbine system are applicable to the heat supply of the heat and power combined generation of the heat supply steam turbine generator unit with the high capacity of 300MW or more.

The invention discloses a double-face photovoltaic battery assembly tracking method based on intelligentized control and a controller. The double-face photovoltaic battery assembly tracking method can calculate a maximum light intensity reception angle value in a cycle through a light intensity sensor and regulates the angle of the double-face photovoltaic battery assembly to be the same as the maximum light intensity reception angle value. The double-face photovoltaic battery assembly tracking method based on the intelligentized control and controller solve generating loss caused by a series of environment factors like different terrains, support shielding, background colors, object passage, etc. The double-face photovoltaic battery assembly tracking method based on intelligent control and the controller are based on real-time measurement of the sensor and based on real-time control of the controller and fully take advantages of high conversion efficiency of the double-face photovoltaic battery and big electricity generating amount.

The invention relates to an impact type water turbine in the technical field of hydraulic electrogenerating. The water turbine is mainly composed of an ejection device and a rotation device, wherein the ejection device is mainly composed of a base plate, a top plate, lateral plates on the two sides and components such as an ejection opening formed by a rotary valve hinged to the water outlet end of the top plate or the base plate and a transmission component of the rotary valve; and the rotation device is formed by components such as a wheel disc or hub arranged on a main shaft, a plurality of blades which are arranged on the outer surface of the wheel disc or hub, the shape of the surface between the two sides is a groove, outer end guide plates arranged on the outer end faces of the groove-shaped blades, inner end guide plates arranged on the inner end faces of the groove-shaped blades and the like, wherein the shape of the surface between the two sides of each blade is in a groove shape. By means of the water turbine, the water flow pressure energy can be efficiently converted into rotary mechanical energy, and the water turbine can be suitable for low-water-head large-flow water energy resources.

The invention relates to the field of brake of wind generating sets, in particular to a wind generating set, and a yawing brake device, a brake system and a brake method for the wind generating set. The yawing brake device comprises a brake disc, a friction plate and a pushing component. After the wind generator set is mounted on a wind generating set base, the surface of the brake disc is parallel to the wind generating set base. The friction end of the brake disc is in contact with the friction surface of the friction plate. A pushing end of the pushing component is propped against the pushing surface of the friction plate. The friction plate is perpendicular to the wind generating set base. Powder generated after the friction plate is in friction with the brake disc can fall automatically under the action of gravity, powder accumulated on the friction plate does not need to be removed manually, the problems of friction coefficient variation, the yawing vibration and the yawing abnormal sound between the friction plate and the brake disc can be avoided, and normal brake of the friction plate and the brake disc is not interfered.

The invention provides an ice preventing and ice removing wind power blade and a manufacturing method thereof. By laying a heat conducting material layer high in heat conduction coefficient in a grooved middle core material to improve the heat conduction coefficient of a wind power blade body, heat generated by heating resistors can be fast transmitted to the outer surface of the wind power bladebody, and therefore energy needed for heating the wind power blade body can be reduced to be lowest, and the problems that because of internal heating in the prior art, the interior temperature of thewind power blade body is too high, the material performance loss of the wind power blade body is caused, and consequently the service life is shortened, and combustion of the wind power blade body iscaused are solved. The heating resistors are uniformly arranged in epoxy structural glue as an adhesion agent, primary packaging is performed when adhering is performed, a glass fiber protecting layer infiltrated by resin is arranged so that the service life of the heating resistors is prolonged, the application reliability of the ice preventing and ice removing wind power blade is guaranteed, and application and popularization value is great.

The invention discloses a starting control method and device for a wind generating set and a storage medium. The method includes the steps that wind direction data and wind speed data of the wind generating set in a wind power field are obtained; according to the wind direction data and the wind speed data, whether or not wind rises in the wind power field is predicted; if yes, a current wind direction is sent to the wind generating set of the wind power field so that the wind generating set can perform yawing for wind facing according to the current wind direction; in response to completion of yawing for wind facing, starting operation is executed on the wind generating set in the wind power field, wherein the wind speed data is larger than preset starting wind speed. By the adoption of the technical scheme in the embodiment of the method and device, whether or not the wind rises in the wind power field can be effectively predicted, yawing for wind facing is performed on the wind generating set in advance according to the prediction result, and accordingly the starting time of the wind generating set is shortened.

The invention belongs to a leaking finding and leaking stoppage overhaul method of a condenser in the production field of electricity generation, and relates to a method for finding a leak source of copper tube leakage of a condenser in a power plant. When leakage occurs, the load is reduced to 80 percent of the rated load, half side of the condenser stops operating, and a leakage side can be judged according to the index conditions, such as sodion content, electric conductivity, hardness and the like. After the leakage side is found, small doors at the two ends of the half side are opened to discharge the accumulated water. The orifice of the copper tube is closed off by using preservative film at one side of the condenser, and the tubes are checked one by one by using candle flame at the other side of the condenser. Since the tube with leakage has vacuum leakage, when reaching the leakage tube, the flame can obviously shift towards the inside of the tube without interference of external wind power. The found copper tube is plugged at two ends so that full-load operation can be recovered quickly. The invention can be realized without halt, thereby avoiding generated energy loss caused by halt, reducing gas diffusing for the power plant with comprehensive gas utilization, and avoiding energy source waste and environment pollution.

The invention discloses a power generation predictive control method for a photovoltaic power station. The method comprises the following steps of: firstly, acquiring weather forecast data in a future time period; and secondly, combining the weather forecast data, current longitude and latitude data, the installed capacity of the photovoltaic power station and historical power generation data of the photovoltaic power station, and thus obtaining the power generation total quantity of the photovoltaic power station in the future time period. Therefore, the power generation quantity situation of some day can be judged, corresponding plan information and early warning information can be output by software, and power generation loss and equipment damage caused by weather change are avoided.

The invention relates to the technical field of photovoltaic power generation, and discloses an ice-pushing upward-sliding snow-accumulation-preventing type water surface photovoltaic floating systemsuitable for alpine regions. The system comprises a photovoltaic module and a plurality of module floating body groups, each module floating body group comprises a plurality of module floating body units arranged side by side, and the photovoltaic module is mounted on the module floating body units through a bracket system. A plurality of channel floating bodies are arranged between every two adjacent rows of assembly floating body groups, each channel floating body is located in the center of the corresponding four adjacent assembly floating body units, and the four corners of each channel floating body are connected with the corners of the corresponding four adjacent assembly floating body units respectively. The two ends, facing the channel floating body, of each assembly floating bodyunit extend outwards to the outer side of the projection of the photovoltaic assembly to form aisles. The ice-pushing upward-sliding snow-accumulation-preventing type water surface photovoltaic floating system suitable for the alpine regions can achieve the functions of resisting freezing loads, preventing snow accumulation coverage and increasing the shadow distance between assemblies, and has the advantages of being simple in structure, easy to achieve, convenient to operate and maintain, safe and reliable.

The invention provides a wind turbine generator blade clearance control method based on load detection, and relates to the field of wind turbine generator regulation and control. The wind turbine generator blade clearance control method comprises the steps that detection points of key parts of a wind turbine generator structure are selected, and load detection is carried out on the key parts; the load of the detected key parts is converted into the load in the pitching direction of a cabin under a static hub coordinate system according to the acquired yawing azimuth angles of a wind wheel and the cabin; a cabin pitching load negative threshold value is obtained through wind turbine generator simulation software according to design specifications, and a variable pitch protection angle is determined; and loads of the key parts such as a blade root, a main shaft, a tower top and a tower bottom of a wind turbine generator are used for identifying a negative pitching load borne by the wind wheel, and the purpose of increasing blade clearance is achieved along with the specific operating condition characteristics of negative wind shearing in combination with a targeted pitch angle control method.

The invention discloses a layered distributed voltage optimization control method for high and medium voltage distribution networks. The method comprises the steps of: dividing high and medium voltagedistribution networks into an upper distribution network and a lower distribution network; performing convexification of the optimization models in the upper and lower distribution networks to obtaina global optimization model; decomposing the global optimization model to a main problem and a plurality of sub problems; calculating the main problem and the sub problems, and mutually transmittingthe optimization parameters of boundary variables between the upper and lower distribution networks; repeating the previous step until the deviations of the upper and lower limits of the global optimization target are smaller than a preset value. The dual-layer distribution networks which are principal and subordinate structures perform few data exchange and distributed alternate computing to obviously reduce the complexity of the global optimization calculation and fully develop the mutual voltage supply capacity between the high and medium voltage distribution networks so as to avoid the distributed photovoltaic generation loss. The model is subjected to layered distributed optimization calculation and issues a control command to a continuous voltage regulation device and a discrete device in the distribution networks based on the obtained optimization calculation result.

The invention discloses a control method and system for the pitch angle of a wind turbine generator set, equipment and a storage medium, and belongs to the field of wind power generation. Whether extreme wind direction changes occur or not is judged by detecting the wind direction measured by a wind indicator and comparing the wind direction with a preset threshold value, and the minimum pitch angle is dispatched to cope with the limit load caused by rapid wind direction changes. The positive and negative wind directions measured by the wind indicator are judged, and the load borne by a large part of the set is larger than that borne in a positive wind direction when the minimum pitch angle is increased during flow incoming in the negative wind direction, so that the limit load is reduced by only performing control of increasing the minimum pitch angle on the wind direction of the positive incoming flow. Compared with a control mode without distinguishing the wind directions, the limit load caused by the extreme wind direction changes of the set is further reduced. By means of a mode of judging the wind speed threshold value, the condition that the current measured wind speed exceeds the threshold value serves as the primary condition, and the problem of loss of the generating capacity of the set due to increase of the pitch angle under the condition that the wind speed is low but the bending moment of the set is not impacted is solved.

The processing method for repairing a blade tip mechanism of a wind turbine generator set. The processing method includes the following steps: dismantling parts inside a blade tip and a guiding box; welding a bolt at the deformation zone of a back plate of the guiding box, installing a back plate correction tool at the edge of the guiding box, the bolt penetrates through the back plate correction tool and is connected with a nut, carrying out correction on the back plate of the guiding box by screwing the nut, after the correction is finished, welding the back plate and a base, and dismantling the back plate correction tool and the bolt; welding the bolt at the deformation zone of a side plate of the guiding, installing a side plate correction tool inside the guiding box, the bolt penetrates through the side plate correction tool and is connected with a nut, and carrying out correction on the side plate of the guiding box by screwing the nut, after the correction is finished, welding the side plate, the back plate and the base, and dismantling the side plate correction tool and the bolt. According to the processing method for repairing the blade tip mechanism of the wind turbine generator set, correction and welding to deformation and open weld of the guiding box of vane blade tip braking mechanism of a fixing blade wind turbine generator set are carried out, and spare parts do not need to be replaced to solve stoppage of the blade tip braking mechanism. According to the process method for repairing the blade tip mechanism of the wind turbine generator set, the technology is simple, and maintenance cost is low.

The invention discloses an engine-driven water source compression type heat pump water vapor modulating machine. By utilizing the engine-driven water source compression type heat pump water vapor modulating machine, investment of a power generator and an electric motor can be saved, power generation loss, power transmission loss and electric loss are avoided, and a pay back period is shortened by 50%; flash evaporation heat is provided by circulating supplementing water which is heated by heat pump heating, sleeve cylinder reheating and smoke reheating in a step manner; secondary steam is generated by throttling, spraying and flash-evaporating; the secondary steam is thermally compressed by pipe network residual pressure, so that (n+1) parts of medium-pressure water vapor is modulated by 1 part of high-pressure water vapor; water vapor modulating circulation and hot water heating circulating are realized by switching; and 3 parts of boiler heat is generated at most by one part of a fuel thermal value.

An inverting apparatus and a control method thereof are disclosed herein. The inverting apparatus includes an inverter. The inverter is configured to convert electrical energy to an output current so as to generate an output terminal voltage. When the output current increases, the output terminal voltage increases correspondingly. The inverter includes a control unit. When the output terminal voltage increases and falls within an alert range, the control unit is configured to control the inverter to decrease the output current or maintain the current output current so as to prevent the output terminal voltage from increasing and exceeding a voltage threshold value that causes the inverter to fall into a trip protection mechanism.

The invention discloses a boiler maintenance platform for a power plant. The boiler maintenance platform includes a fixing table, a fixing frame and a fixing plate. The middle part of the lower surface of the fixing table is fixedly connected with an electric hydraulic push rod through a bolt, and the bottom end of the electric hydraulic push rod is fixedly connected with a mounting table througha bolt. Servo motors are arranged at the four corners of the periphery of the fixing frame, a rope is connected with take-up reels of the servo motors, and therefore a user can effectively control andadjust the position of the user in the fixing frame through the controller, the orientation of the user in the fixing frame can be further adjusted during synchronous displacement through the fixingframe, the user can effectively perform displacement adjustment according to actual maintenance requirements, the maintenance efficiency during operation of the user is improved, and the power generation loss caused by long-term shutdown of a boiler is effectively avoided.

The invention belongs to the technical field of wind power generation, and particularly discloses an automatic unit start-stop control method based on theoretical power of a wind power plant. On the premise of meeting the requirement of dispatching for the output of the wind power plant, internal start / stop rotation of a wind turbine group is achieved, a target value can be ensured to be rapidly tracked by adjusting the active power of a grid-connected wind turbine generator when the dispatching target value of the power grid is increased, and power generation loss caused by start time consumption is avoided. Meanwhile, redundant start and stop actions of the unit caused by rapid change of a power grid dispatching instruction and wind speed are avoided, and healthy and stable operation ofthe unit is guaranteed. The method can be combined with an active power control distribution strategy of the wind power plant to better realize active dispatching in the wind power plant, reduce unnecessary unit wear, grease consumption and the like, prolong the service life of the wind turbine generator, improve the economic benefit of the wind power plant and effectively ensure the stability ofa power system.

The invention provides an online state identification method and device for a variable pitch execution mechanism of a wind generating set. The method comprises the following steps: acquiring a pitch angle given value and a pitch angle measured value of a variable pitch execution mechanism within a specific time period in a specific sampling period; calculating the obtained pitch angle given value and the pitch angle measured value to obtain parameters of a transfer function between the pitch angle given value and the pitch angle measured value of the variable pitch execution mechanism; and carrying out online state identification of the variable pitch execution mechanism by using the parameters.

The invention discloses a grid fault-tolerant correction method for a photovoltaic support. The method comprises the following steps: configuring support scene attributes and performing numerical expression on the support scene attributes; acquiring and forming a grid sample set according to the numerical expression of the support scene attributes, and simultaneously acquiring an expert sample set and a to-be-detected sample set; performing zero-sum game network training solidification on the grid sample set by using the expert sample set to obtain an expert sample extension set; training a self-organizing competition network model by using the to-be-detected sample set, the grid sample set and the expert sample extension set; and inputting the support scene attribute of the target photovoltaic support into the self-organizing competitive network model to obtain a gridding fault-tolerant parameter vector for matching correction. Through configuration of support positioning scene attributes and grid management of a narrow-domain interval judgment matrix, light resource scene generation in a maximum fault-tolerant range is realized. And power generation loss caused by shadow shielding is avoided, and operation and maintenance management in a construction stage is realized.