102results about How to "Reduce design capacity" patented technology

The invention relates to a desulfurization waste water recycling and zero discharge system and method. The desulfurization waste water recycling and zero discharge system comprises a desulfurization tower, a filter and a nanofiltration device which are sequentially connected, wherein a scale inhibitor dosing device is arranged at the inlet of the nanofiltration device, the concentrated water outlet of the nanofiltration device is connected with the desulfurization tower, the fresh water outlet of the nanofiltration device is connected with a saline water concentrating device, the fresh water outlet of the saline water concentrating device is connected with a fresh water tank, the concentrated water outlet of the salt water concentrating device is connected with a crystallizer, and the condensed water outlet of the crystallizer is connected with the fresh water tank; a drying encapsulating machine is arranged at the solid outlet of the crystallizer. The desulfurization waste water recycling and zero discharge system has the advantages that desulfurization waste water discharged from the desulfurization tower is filtered and then is fed into the nanofiltration device, nanofiltration concentrated water returns to the desulfurization tower, nanofiltration fresh water is treated by virtue of the salt water concentrating device and then is crystallized by virtue of the crystallizer, the obtained fresh water is recycled in the fresh water tank, and salt is separated out, dried into crystallized salt and transported outside after being encapsulated, so that zero discharge of the desulfurization waste water is realized, quality of the recycled fresh water is improved, and a chemical agent and operating cost are saved.

The invention belongs to the technical field of vehicles, and discloses an automobile power supply control system. The automobile power supply control system comprises a storage battery current sensor, an automobile body controller and an engine management system, wherein the automobile body controller is connected with a storage battery, the storage battery current sensor and the engine management system and is used for acquiring current, voltage and temperature of the storage battery so as to obtain the current SOC (state of charge) of the storage battery; the engine management system is connected with an intelligent generator voltage regulation controller and is used for sending a target voltage control instruction to the intelligent generator voltage regulation controller according to the current SOC of the storage battery so as to enable the intelligent generator voltage regulation controller to adjust the voltage of a generator to be the target voltage according to the control instruction; the engine management system sends the control instruction to the automobile body controller according to the current SOC of the storage battery, so that the automobile body controller controls the working state of a comfortable electrical appliance load and / or the working state of an air conditioner according to the control instruction. According to the automobile power supply control system, the design of the generator and the storage battery is optimized; the design capacity of the device is reduced; the weight and the cost of the whole automobile are lowered.

The invention discloses an alternating-direct current series-parallel port distribution network and a comprehensive dispatching control method thereof, and belongs to the field of port distribution power and distribution network automation. The distribution network comprises a general step-down station, a branch substation or a switch-on / switch-off station and various distribution subsystems; a multi-channel feeder of the general step-down station provides alternating current power for the various distribution subsystems through the branch substation or the switch-on / switch-off station; each distribution subsystem comprises a shore electronic system, a shore bridge subsystem, a field bridge subsystem, a power charging and converting station subsystem for electric port trailers, a new energy subsystem and a production life subsystem; each distribution subsystem utilizes an alternating current distribution transformer and an AC / DC converter to construct a direct current bus of the distribution subsystem, and the direct current buses of the distribution subsystems are in direct current interconnection through direct current interconnection protection switches; each distribution subsystem is internally provided with multiple sections of direct current buses, and the multiple sections of direct current buses are in direct current interconnection through direct current interconnection protection switches. According to the alternating-direct current series-parallel port distribution network and the comprehensive dispatching control method thereof, the optimal power supply and comprehensive dispatching control of the port distribution network can be achieved.

The invention discloses a repetitive-control-based method for controlling a compensation current of a DSTATCOM (Distribution Static Synchronous Compensator). The method comprises the following steps of: (1) acquiring a grid voltage, a load current and the compensation current; (2) extracting current commands from the load current; and (3) carrying out repetitive control and PI (Proportional-Integral) control according to the current commands, and then, outputting voltage commands to the DSTATCOM. According to the repetitive-control-based method for controlling the compensation current of the DSTATCOM, the no-static-error tracking of the low-order harmonics, comprising fundamental harmonics, of the DSTATCOM can be achieved, the compensation accuracy of the DSTATCOM is improved, the compensation bandwidth of the DSTATCOM is increased, and the compensation capability and accuracy of the DSTATCOM with unbalanced loads are improved, so that the DSTATCOM can have harmonic compensation and suppression capabilities, the use of passive filters at the outlet side of the DSTATCOM is reduced, the harmonic performance of the compensation current of the DSTATCOM is improved, the harmonic output is reduced, and the pollution to a power grid is reduced.

A technique for producing coal natural gas by utilizing crushed coal slag through gasification includes that part of crude coal gas containing CH4 produced by crushed coal slag through gasification receives sulfur tolerant shift, the other part of crude coal gas is conveyed in a sub-line and converges with the gas after sulfur tolerant shift to be cooled, the cooled gas is purified to remove CO2,H2S, naphtha and H2O and other impurities to obtain synthesis gas meeting the methane synthesis H / C ratio, the synthesis gas performs methane synthesis under the effect of methane conversion catalyst, and the methane-synthesis natural gas (SNG) is transmitted in long-distance pipeline network after compression and drying. The invention has the advantages of high gasification rate, high gasification intensity, low consumption and low water content of coal gas.

The invention discloses a VIENNA rectifier neutral point potential alternating-direct-current component balance control method which can reduce design capacity of a capacitor on a direct-current side and a filter on an alternating-current side and save cost of a tri-level VIENNA rectifier. On the basis of common mode component injection modulation, a common mode component direct-current compensation coefficient and an alternating-current compensation coefficient are modified dynamically, so that the problem of neutral point unbalance of direct-current and alternating-current components is solved; more importantly, the method guarantees uniformity between triphase alternating-current side harmonic distortion rate and SVPWM while substantially inhibiting neutral point potential low-frequency oscillation in conventional modulation methods and improving quality of output power and can be popularized and applied in the field of battery testing, charging facilities and driving systems.

A positive electrode for a non-aqueous electrolyte secondary battery of the present invention has: a current collector; and a positive electrode active material layer formed on the current collector. The positive electrode active material layer contains, as positive electrode active materials, spinel lithium manganate, and a composite oxide represented by the following formula (1): LiCo v Ni x MnyM z O 2 (1), where v+x+y+z=1, M is any one selected from the group consisting of aluminum, gallium and indium, 0 <= v <=0.5, 0.3 <=x <1, 0 <= y <= 0.5 and 0 <=z<= 0.1. Further, an average particle diameter of the composite oxide is larger than an average particle diameter of the spinel lithium manganate.

The invention relates to a unified power quality control device employing a resonant electronic switch, and belongs to the technical field of power electronics and flexible alternating current transmission and distribution. The device comprises the resonant electronic switch, a voltage source converter, an energy storage unit and a master control system, wherein the master control system consists of a master controller and a plurality of sensors; the resonant electronic switch comprises a group of inductors Lr1 and Lr2, a group of capacitors Cr1 and Cr2 and a group of bidirectional thyristors T1; a branch formed by connecting the bidirectional thyristors T1 in series with the inductor Lr2 and the capacitor Cr1 is connected in parallel with the inductor Lr1; and a parallel branch formed by Lr1, Lr2, Cr1 and T1 is connected in series with the capacitor Cr2. A method comprises the steps of judging various power quality faults and controlling the device to quickly switch and operate among four modes. The device has the advantages of simple structure, low cost, high overload resistance and high operation efficiency.

The invention discloses a topological structure and system for realizing independent voltage control of a bipolar direct current bus. A three-level converter topology comprises a T type three-level converter and a single-phase imbalance bridge arm; a control system comprises positive and negative direct current bus voltage control for the T type three-level converter and negative direct current bus voltage control for the single-phase imbalance bridge arm, so as to complete the independent voltage control of the bipolar direct current bus; and meanwhile, the independent control has relatively high interference resistance on a direct current load imbalance condition. The topological structure and system are simple and convenient, efficient, and easy in numeralization realization, so that the bipolar direct current bus system adopting the three-level converter can realize efficient and stable operation, and the application occasions of the three-level converter and the bipolar direct current bus structure are greatly expanded.

The invention relates to a platform door unlocking device of an elevator, wherein the locking device of a platform door is operated by the driving of an actuator for unlocking. The actuator is controlled by an unlocking control part. The unlocking control part receives an unlocking instruction signal to make the actuator perform the unlocking operation.

Provided is a refrigerator, wherein an operation transmitting unit (115) is disposed on the inner wall on the side of a case of a pull-out type vegetable chamber door (106a) and a detecting unit (114)is disposed on a portion of an insulated partition plate (109) that faces the operation transmitting unit. Pushing the vegetable chamber door (106a) further in from the normal closed state is determined to be a door opening operation by a stress sensor (121).

The invention belongs to the technical field of flue gas denitration and relates to a system for denitration by spraying ammonia gas in a large-sized boiler high-temperature flue gas area. A boiler comprises a horizontal flue and a vertical flue. The system comprises an SNCR (selective non-catalytic reduction) system provided with a reducing agent injector, the reducing agent injector is a spray pipe disposed on the transverse section of the horizontal flue, an input end of the spray pipe is connected with a reducing agent conveyer, the other end of the spray pipe is closed, and the wall of the spray pipe opposite to flue gas is provided with a spray hole. The invention also discloses a denitration process for denitration treatment using the system, the denitration treatment with the system gives high denitration rate and low ammonia escape quantity as well as full flue gas purification, this product is applicable to present coal-consuming boilers for thermal power generation, iron and steel, chemicals, cements and the like, and satisfactory NOx emission index of these boilers can be ensured.

A nickel-hydrogen battery and a production method for positive pole material of the nickel-hydrogen battery are disclosed, the method comprises the following steps of: 1) production of the positive pole, at first, the surface of spherical nickel hydroxide as positive pole active substance is covered with a gamma-CoOOH covering layer, then the spherical nickel hydroxide whose surface is covered with the gamma-CoOOH is partially oxidized, average chemical valence of the nickel after oxidization is controlled as 2.08-2.20; 2) production of the negative pole, proportion of the capacitance of the negative pole to the capacitance of the positive pole is (1.15-1.25):1; 3) assembly for the negative pole, the positive pole and membrane; 4) formation of the battery, 0.05C-0.2C of current is adopted to activate the battery for 3 to 10 weeks with charge and discharge capacitances during each week being between 30% and 100%, and the current amount of the battery at the time of discharging in the first week is discharged to zero. The positive pole uses the partially-oxidized spherical nickel hydroxide whose surface is covered with the gamma-CoOOH, when the designed capacitance proportion of the positive and negative poles is fixed, the designed capacitance of the negative pole can be reduced correspondingly, powder applying amount of the negative pole is lessened, manufacturing cost of the battery is saved, and the battery is able to maintain the characteristics of long service life and resistance to overcharge.

The invention relates to a filter circuit, and in particular relates to a filter circuit for a series part of an SSSC (static synchronous series compensator) and a UPQC (unified power quality conditioner) and a control method of the filter circuit. The filter circuit is connected with a series part at an inverter side of the SSC or a series part of an inverter side of the UPQC; the filter circuit comprises an LC (launch controller) filter circuit, a phi-type filter circuit, an LCC (launch control center) or LCCR (liquid crystal display contrast control register) series-parallel filter circuit, an LCL (lower control limit) series-parallel filter circuit and a C-type filter. The filter circuit adopting an RCL (recoilless launcher) series-parallel resonance way is used for filtering high-frequency harmonic waves of current generated in an SSSC converter or a UPQC converter, the overlarge current reducing rate can be inhibited, the output precision of the device can be improved, and the performance of the device can be improved.

The invention discloses a series hybrid electric energy quality controller. The series hybrid electric energy quality controller comprises a transformer, a voltage source type inverter, a modulation signal generation module and a simplified passive filter, wherein the primary side winding of the transformer is connected between a power supply and a nonlinear load in series; the secondary side winding is connected with the output end of the voltage source type inverter in parallel; the modulation signal generation module is used for generating fundamental waves and specific sub-harmonic modulation control signals and sending the fundamental waves and the specific sub-harmonic modulation control signals to the voltage source type inverter; the voltage source type inverter is used for generating an alternating current signal at the same frequency as the modulation signal and sending the alternating current signal to the secondary side winding of the transformer; the primary side winding of the transformer presents low impedance to the fundamental waves, presents higher impedance to the specific sub-harmonics and presents high impedance to the harmonics besides the specific sub-harmonics; and the simplified passive filter presents high impedance to fundamental waves, and presents low impedance to the specific sub-harmonics. The series hybrid electric energy controller is relativelylow in cost, more practical and high in system stability and reliability.

Intelligent control system is a distributed control system composed of one main controller and multiple branch controllers. Through comm. interface, the main controller is connected to each branch controller. In the system, reproducible energy is connected to storage battery. Through auxiliary charge power supply, storage battery is charged. Monitoring and sampling parameters such as each load, reproducible energy, current, voltage of storage battery, as well as through analyzing and processing, main controller outputs control signal to control charging and discharging storage battery. Through comm. interface, main controller controls branch controller so as to select electric supply or battery to supply power for loads automatically. Being connected to electric supply, the system reduces designed capacity of storage battery, uses reproducible energy farthest so as to raise service life of battery. The system is applicable to consumers and illumination system in DC low voltage.

The invention relates to a solar energy conversion control device used for elevators, which comprises a photovoltaic array 1, a battery 2, a charging and discharging controller 3, an elevator controller 4, an inverter 5, a delay relay 6, a commercial power network 7, a first contactor 8, a second contactor 9 and a special inverter 10. The output end of the photovoltaic array 1 is connected with the power input end of the charging and discharging controller 3. The battery 2 is connected with the charging and discharging controller 3, the inverter 5 and the first contactor 8 respectively. The inverter 5 and the delay relay 6 are connected. The charging and discharging controller 3, the delay relay 6, the commercial power network 7 and the special inverter 10 are respectively connected with the input end of the elevator controller 4. The commercial power network 7 is connected with the delay relay 6 and the first contactor 8 respectively. The first contactor 8 and the second contactor 9 are connected. The second contactor 9 and the special inverter 10 are connected. The solar energy conversion control device has reasonable design and stable performance, makes full use of solar energy and saves power to the utmost extent.

The invention discloses a cooling system based on a phase change microcapsule liquid pulp cold storage device and an operation method. The system is mainly composed of a master refrigerating machine, a pulp storage tank, a user terminal, two liquid pulp pumps and multiple valves. In the cooling system, phase change microcapsule liquid pulp serves as a storage medium to store cold energy and also serves as a transfer medium to transfer the cold energy. By means of the phase change microcapsule liquid pulp, the energy storage density is remarkably increased, and meanwhile, energy transfer efficiency is remarkably improved; and the whole system can be more compact and miniaturized. The system has five different operation modes for cold storage and supply; by means of feedback conducted based on monitoring points, flexible mutual switching is achieved through switching-on or switching-off of the pumps and the valves; the system is adapted to cooling load fluctuation better, and meanwhile, peaking shaving of electrical load is achieved; and the purpose that operation efficiency of the system is improved is achieved.

The invention discloses a novel DC transmission system suitable for offshore wind power integration. The novel DC transmission system is characterized by comprising a converter transformer with a compensation winding on a rectification side, a compensation converter connected to the compensation winding on the rectification side, a control system of the compensation converter, a thyristor rectification station, a thyristor inversion station, a converter transformer with a compensation winding on an inversion side, a compensation converter connected to the compensation winding on the inversionside, and a control system of the compensation converter. The thyristor rectification station and the thyristor inversion station are connected through a DC transmission line. The compensation converters and the control systems thereof are used for controlling the compensation currents of the compensation windings. Harmonic wave and reactive power compensation is carried out on the secondary sidethrough the transformer compensation winding side, and therefore, harmonic waves are prevented from entering a primary side power grid and an inversion side power grid. The novel DC transmission system has the advantages of both a conventional high-voltage DC transmission technology and a flexible DC transmission technology, and is suitable for offshore wind power transmission.

The invention relates to a regional interconnected intelligent solar street lamp control method. According to the method, a control apparatus for adjusting the brightness of solar street lamps in different periods at night is provided, pedestrians or vehicles can be detected through sensors, simultaneous turn-on of a plurality of street lamps adjacent to wireless emitters is controlled through the low-power-consumption wireless emitters, a time-delay circuit is turned on, and the street lamps are turned to low-power-consumption illumination or are turned off after the pedestrians or the vehicles leave for a certain period.

The invention discloses an MMC converter station low-voltage ride-through method based on resonance controllers and a control system. In order to solve the problem of output current distortion of an MMC converter station when an asymmetric fault of a power grid occurs, suppression of negative-sequence and zero-sequence components and an internal loop current in the output current is realized through three resonance controllers respectively. Compared with the existing method for respectively controlling the positive and negative sequence components of the current under a forward and reverse rotation synchronous coordinate system, the method is simpler in control structure and can suppress the zero-sequence current and further improve the power sending-out capability of the MMC converter station, thereby reducing the design capacity of a DC chopper, reducing the engineering construction cost, and even realizing the fault ride-through operation of the system under the condition that the DC chopper does not need to be input when the fault is relatively light. The MMC converter station low-voltage ride-through method based on resonance controllers is simple in structure and remarkable in effect and has high engineering practical value.

The invention provides a vertical assembling device and method for a molten carbonate fuel cell stack, and belongs to the technical field of cell assembling. The vertical assembling device for the molten carbonate fuel cell stack comprises a rack, a bottom plate, and a pressing plate which is provided with an upper pressing plate and a lower pressing plate which are oppositely arranged, the upper pressing plate and the lower pressing plate are connected through a tightening screw rod; a cell stack is placed between the upper pressing plate and the lower pressing plate; the device further comprises an insulating plate which is provided with an upper insulating plate and a lower insulating plate; the upper insulating plate is arranged between the cell stack and the upper pressing plate; the lower insulating plate is arranged between the cell stack and the lower pressing plate; the device further comprises a driving device which is arranged at the upper end of the rack; and the driving end of the driving device is suitable for abutting against the upper pressing plate and providing pressure for the upper pressing plate. The vertical assembling device for the molten carbonate fuel cell stack is reasonable in structural design, good in compatibility with existing equipment and simple to operate.

The invention discloses a lithium titanate-based lithium ion battery negative electrode. The lithium titanate-based lithium ion battery negative electrode comprises a current collector and a negative electrode material, wherein the negative electrode material is coated on the current collector and comprises a lithium titanate active substance, a conductive agent, a binding agent and an additive, the lithium ion receiving capacity of the additive after initial charge is over two times of that of the lithium titanate active substance, and the addition quantity of the additive accounts for 0.2-4wt% of the lithium titanate active substance. By the lithium titanate-based lithium ion battery negative electrode, the positive electrode capacity can be fully developed, so that the design capacity of the battery is improved; and the additive employs a substance with charge-discharge rate smaller than 50% in an initial period, a large part of lithium ions absorbed by the additive can be fixed and do not participate in subsequent charge-discharge circulation, so that repeated volume expansion and shrinkage of the additive is reduced or eliminated, the damage to an electrode structure is improved, and the lithium titanate-based lithium ion battery negative electrode has the characteristic of longer cycle lifetime. Correspondingly, the invention also provides a lithium ion battery employing the lithium titanate-based lithium ion battery negative electrode and a formation method of the lithium ion battery.

The invention discloses a hydrogenation processing method of Fischer-Tropsch synthetic oil and the method is that the Fischer-Tropsch synthetic oil is divided into lightweight cut and heavyweight cut which are mixed with synthetic wax after prerefining and then are subjected to hydrogenation processing; the products of the hydrogenation processing enter a first high-pressure separator and the liquid products separated enter a fractionating system through a low-pressure separator; the separated hydrogen-rich gas is mixed with heavy component separated from the fractionating system and then is subjected to hydrogen cracking; cracking products enter a second high-pressure separator and the separated liquid products enter the same low-pressure separator and fractionating system with the hydrogenation processing; the separated hydrogen-rich gas is pressurized by a circulating hydrogen compressor and is mixed with new supplementary hydrogen and then enters a hydrogen preprocessing reactor. Cetane value of diesel oil acquired is higher than 70, solidifying point is below 0 DEG C and the content of sulfur and nitrogen is extremely low, meanwhile, naphtha acquired is high-quality raw material used for producing ethylene by steam cracking.

A conductive glass of a dye-sensitized solar cell comprises a conductive glass layer, the upper surface of the conductive glass layer is provided with a low-resistance grid electrode and a compact titanium dioxide barrier film layer sequentially from bottom to top, and the compact titanium dioxide barrier film layer isolates the low-resistance grid electrode from the external environment; the performance of the cell is proximate to the performance of a small area cell, and the low-resistance grid is unlikely to be oxidized and corroded by electrolytic solution; meanwhile the technique is simple, and the cost is low; the conductive glass is applicable to large area dye-sensitized solar cell.

The invention discloses a heat-power cogeneration system and method using solar energy or air energy, and belongs to the field of heat supply and solar application. The system comprises a source sideassembly, a user side assembly and a double-source combined heat pump. The source side assembly is provided with a high-temperature water tank and a low-temperature water tank; a solar energy heat absorption branch, a low-temperature water tank branch, a heat pump evaporator branch and a high-temperature water tank branch are arranged in parallel on a water pipe path; the user side assembly comprises a user heating branch and a heat pump condenser branch; and the double-source combined heat pump is provided with a water source evaporator branch and an air source evaporator branch. The system is compact in structure, flexible in adjustment, safe and reliable, and has broad application prospects. The heat supply method can realize three heat storage modes of solar energy low-temperature water tank heat storage, solar energy high-temperature water tank heat storage and air source high-temperature water tank heat storage and two heat supply modes of water source heat pump heat supply and air source heat pump heat supply by switching between a water path and a refrigerant branch, simultaneously realizes efficient cooling of photovoltaic back sheets, and improves the heat supply guarantee rate and the solar energy utilization rate.

The invention discloses a middle-low-speed normal conducting maglev vehicle motor stator winding multi-segment distribution structure. A large linear motor is used at a single side of each carriage of a maglev vehicle, a stator winding of each large linear motor is divided into N segments of the same length and distributed on corresponding N steering frames, the distance between each segment of motors is 1 / N of motor pole distance, two adjacent segments of motor windings are arranged differently, and the phase sequence of the next segment of motor winding is lagged 60 degrees than that of the front segment of motor winding, thereby making air gap magnetic fields between each segment of motors continuous. The middle-low-speed normal conducting maglev vehicle motor stator winding multi-segment distribution structure can obviously increase efficiency and power of the motors, creates conditions for designing high-speed maglev vehicles. The similar design principle can be applied to a driving method of a linear asynchronous motor of wheel track vehicles such as light rails or subways.

The invention relates to the technical field of cavitation-erosion-resistant systems, in particular to a variable-frequency refrigerant pump inlet cavitation-erosion-resistant system and a control method thereof. The variable-frequency refrigerant pump inlet cavitation-erosion-resistant system comprises a refrigerant pump, a liquid accumulator, a condenser, a fan, a refrigerant temperature sensor, a refrigerant pressure sensor, a liquid level sensor and a controller. The output end of the condenser is connected with the input end of the liquid accumulator. The output end of the liquid accumulator is connected with the input end of the refrigerant pump. The refrigerant temperature sensor and the refrigerant pressure sensor are mounted on an inlet pipeline of the refrigerant pump. The liquid level sensor is connected with the liquid accumulator. The fan is connected with the condenser. The refrigerant pump, the fan, the refrigerant temperature sensor, the refrigerant pressure sensor and the liquid level sensor are electrically connected with the controller. Through the cavitation-erosion-resistant system and the control method thereof, the design capacity and refrigerant charge amount of the liquid accumulator can be greatly reduced, meanwhile, the liquid accumulator does not need to be designed in the high position away from a refrigerant pump inlet, and the system is compact in structure, low in cost and reliable in operation.

The invention provides a hydraulic control system and a hydraulic control method of a front blank pushing cylinder of a perforating machine. The front blank pushing cylinder comprises a rod cavity and a rodless cavity, a hydraulic oil pipe comprises a pressure oil pipe and an oil return pipe which are respectively communicated to a proportioning valve, and the proportioning valve is communicated to the rodless cavity through a first pipe and communicated to the rod cavity through a second pipe. A valve for achieving forward breakover and reverse check is arranged on the second pipe. The rod cavity is communicated to the pressure oil pipe through a third pipe, and a valve for achieving reverse breakover and forward check is arranged on the third pipe. Compared with the prior art, the using amount of the valves is decreased, and multiple control actions are finished by utilizing one proportioning valve. The impact shake and slight pause problems when the blank pushing cylinder is switched from rapid speed to work speed are effectively solved. In addition, the design capacity of the hydraulic system is effectively reduced by utilizing two non-return pipes, and the manufacture cost is reduced.