37results about How to "Improve power generation utilization" patented technology

The ultra-short-term power forecast method of clear-sky photovoltaics based on real-time radiation collection technology uses the relationship between the radiation intensity of the circumscribed plane of the atmosphere and the ground radiation intensity under clear sky, and combines the real-time data of the ground radiation automatic environmental monitoring station to predict the future ground 0-4 The hourly solar radiation intensity is predicted, and the predicted results are input as parameters into the photoelectric conversion model to output the power generation of photovoltaic power plants in the next 0-4 hours. According to the prediction results, power grid dispatching can make overall arrangements for the coordination and cooperation of conventional power sources and photovoltaic power generation, rationally arrange the operation mode of the power grid, optimize real-time dispatching and adjustment, and accept more photovoltaic power generation. On the other hand, reduce the spinning reserve capacity and operating costs of the power system to Make full use of solar energy resources and reduce greenhouse gas emissions, so as to obtain greater economic and social benefits.

The invention discloses an ultrashort-term photovoltaic power prediction method based on cloud change analysis and belongs to the technical field of photovoltaic power generation. The method is characterized by, through the real-time image acquisition technology, obtaining image information above a photovoltaic power station in real time, carrying out prediction on meteorological conditions above the photovoltaic power station, and inputting forecast results, serving the as correction parameters, to a photovoltaic power generation model to predicate output power of the photovoltaic power station. The method can reach an effect of carrying out accurate prediction on ultrashort-term photovoltaic power; prediction precision can reach 0-4 hours in the future; and through power grid dispatching, day generating plan can be modified in real time according to the forecast result, thereby improving power generation utilization rate of the photovoltaic power station under the condition of ensuring stable operation of the power grid.

The invention discloses an energy-saving timing control method and system. The method comprises the steps of receiving a timing control command input by a user, wherein the timing control command contains the preset timing time; determining whether the timing control command is a timing start-up command or a timing close-down command; when the timing control command is the timing start-up command,determining the actual start-up time according to the power generation power and the operation power of the system; and when the timing control command is the timing close-down command, determining the actual close-down time of a unit, wherein the actual start-up time and the actual close-down time are each earlier than or equal to the preset timing time. Therefore, intelligent timing control ofthe system can be achieved; when the timing control command is the timing close-down command, the unit can be switched off in advance, and energy is further saved; the actual start-up time of the unitcan be determined according to the operation power and the power generation power; the method is simple; and the utilization rate of generated power is increased while the comfort level of the user is raised.

The invention discloses a capacity configuration method used for a grid-connected wind and light storage system. The method includes following steps: selecting a target area; acquiring the wind speed, the solar irradiation intensity, the ambient temperature, and the electricity consumption power of a typical year of the target area; determining the maximum possible installation capacity of a wind generating set and a photovoltaic array of the target area according to the wind speed, the solar irradiation intensity, and the ambient temperature of the typical year of the target area; obtaining the complementary characteristics of wind energy and luminous energy of the target area according to the wind speed, the solar irradiation intensity, and the ambient temperature of the typical year of the target area; calculating and obtaining the configuration capacities of the wind generating set and the photovoltaic array according to the complementary characteristics of the wind energy and the luminous energy of the target area; and calculating and obtaining configuration parameters of an energy storage battery according to the configuration capacities of the wind generating set and the photovoltaic array of the target area. According to the capacity configuration method, the configuration capacities of the wind generating set and the photovoltaic array can be used to the maximum, and the generating utilization rate of the wind generating set and the photovoltaic array can be increased.

The invention discloses a pricing method and system for electricity prices. The method includes steps of: forecasting the user load capacity and the distributed power supply generation capacity in each hour in the previous day in response to the new electricity price; calculating the difference between the user load capacity and the distributed power supply generation capacity in each hour in response to the new electricity price; and according to the user load capacity, the distributed power supply generation capacity, and the difference between the user load capacity and the distributed power supply generation capacity in each hour in response to the new electricity price, using the particle swarm optimization to optimize the electricity price optimization model under the pre-set agreed conditions to obtain the change amount of the electricity price corresponding to each hour and the maximum return corresponding to one day. Based on the distributed power supply short-term forecast generation capacity and cost and combined with the tou price and the step tariff, the load peak and off-peak difference is reduced, the utilization of renewable energy power generation is improved, the power consumption cost of the user is lowered and the income of the power selling company is increased.

The invention discloses a solar electric vehicle charging controller. The solar electric vehicle charging controller comprises a shell and a circuit board installed in the shell; a control circuit is arranged on the circuit board; the control circuit comprises an input module circuit, an input voltage sampling circuit, an input current sampling circuit, a boosted main circuit, a MCU main control chip, a MCU peripheral circuit, a digital-analogue conversion circuit, a pulse width modulator driving circuit, an output voltage sampling circuit and an output module circuit. The charging controller provided by the invention can automatically identify the voltage grades of storage battery sets, and automatically output reasonable storage battery filling protection voltage according to different voltage grades of the storage battery sets; therefore, use operation of users is effectively simplified and convenient; simultaneously, the problem that a solar panel on an electric vehicle is easily interfered by a shadow can be avoided; the power generation efficiency of the solar cell panel is increased; waste of energy is avoided; and thus, the voltage of the storage battery can be acquired and identified when the storage battery is effectively filled fully and the output module circuit is closed.

The invention discloses a power supply control method and system. The method comprises the steps of acquiring a power supply mode selecting instruction; judging whether the power supply mode selecting instruction indicates that a distributed generation system and/or mains supply system is adopted for providing power for a load; providing power for the load by means of the distributed generation system and/or mains supply system indicated by the power supply mode selecting instruction if yes. The power supply control method and system solve the technical problem of the prior art that utilization rate is low due to the fact that only one power supply mode is available, and achieve the technical effect that load power supply mode can be adjusted as needed so that the utilization rate of power generated by the power supply system can be increased.

The invention provides a solar tracking gear assembly which adopts primary involute geardrive, primary double-crank involute planetary gear drive with small teeth difference, and primary NGW planetary gear drive and primary bevel gear drive. The azimuth angle adjusting drive and the altitude angle adjusting drive of a solar cell panel are controlled through two brakes. The solar tracking gear assembly has the following advantages: (1) high speed ratio, high torque and small size, wherein the single stage speed ratio of involute geardrive with small teeth difference can reach a maximum of 100, the single stage speed ratio of planetary gear drive can reach 13, the driving energy consumption is reduced greatly, and the energy generation plant factor is improved; (2) large rigidity and good drive performance, wherein the inertia force of a rotary gear train is reduced through multistage deceleration, the additional dynamic load is reduced obviously, and a drive system operates more stably; the solar tracking gear assembly has multipoint internal meshing and power dividing characteristics, high shock resistance and overloading resistance, and large torsional rigidity; (3) double degree-of-freedom output, the solar tracking gear assembly gets rid of a traditional driving mode of multiple motors and multiple driving units, driving mechanisms are simplified, and energy consumption and purchase costs are lowered; (4) excellent manufacturability.

The invention discloses an active power distribution system source network load storage day-ahead active power scheduling method based on sequence operation, and the method comprises the steps: 1, carrying out the improvement of a problem that the dynamic network reconstruction of a power distribution network is not considered in the active power optimization operation of an active power distribution system; considering various controllable resources of dynamic network reconstruction, interruptible load reduction and energy storage system charging and discharging strategies at the same time; 2, taking the lowest day-ahead comprehensive operation cost of the active power distribution system as a target, constructing a source network load storage active power optimization scheduling model of the active power distribution system, and discretizing wind power, photovoltaic output and load prediction probability models into a probabilistic sequence to carry out load flow calculation, so that the problem of uncertainty of active output and load of distributed renewable energy power generation is solved; and 3, combining the active power distribution system source network load storage active power optimization scheduling model considering the dynamic network reconstruction with a firefly algorithm to complete the solution of the mixed integer programming problem.

The invention discloses a control method and a control device for a DC/DC converter of an energy storage device in a distributed power generation system. The control method comprises the steps of: detecting and acquiring at least two kinds of parameters among parameters of the energy storage device, parameters of a power generation device in the distributed power generation system, and parametersof a load; and generating a control strategy by utilizing a genetic algorithm according to the parameters, and controlling the DC/DC converter. The control device comprises a single chip microcomputer, an RS232 communication interface circuit, a power circuit and a display circuit. The control method and the control device for the DC/DC converter provided by the invention can generate an optimal control strategy according to the actual power generation condition of the distributed power generation system, so that the charging and discharging control of the DC/DC converter cooperates with the power generation device in the distributed power generation system and the load in operation, and the optimal control of the distributed power generation system is achieved.

The invention is suitable for the technical field of uninterruptible power supplies, and provides a charging control method and device for an uninterruptible power supply of a new energy power generation system. The method comprises the following steps: acquiring the maximum allowable power and the input power of the uninterruptible power supply at the current moment, and the charging parameter of an energy storage device in the uninterruptible power supply at the current moment; subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment; determining the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power at the current moment and the parameters of the energy storage device; and adjusting the charging parameter of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment to obtain the charging parameter of the energy storage device at the next moment. By adjusting the charging parameters in real time, the power generation power utilization rate of the new energy power generation system can be improved.

The invention discloses a household distributed energy scheduling method based on a storage battery energy storage system. The method comprises steps of calculating the power generation power of photovoltaic power generation equipment, determining the working power of the storage battery energy storage equipment, and determining the actual load demand electric quantity; dividing a high-electricity-price time period and a low-electricity-price time period by taking an average electricity price as a reference so as to schedule the storage battery according to a low-price energy storage and high-price energy discharge principle; and solving an optimal charging and discharging state of the storage battery based on the optimal scheduling model of the energy storage equipment by adopting an inertia weight linear decreasing particle swarm optimization algorithm. The household distributed energy scheduling method based on the storage battery energy storage system is advantaged in that a problem of unstable photovoltaic power generation is solved, by considering an energy storage system and implementing different storage battery charging and discharging strategies according to high and lowelectricity prices, distributed coordinated electricity utilization is carried out, electricity utilization scheduling can be carried out under the condition that the service time of electric appliances is not changed, meanwhile, the photovoltaic power generation utilization rate can be increased, and electricity utilization cost can be reduced.

The invention provides a static water rising circulating power generating system based on an injection pump. A circulating power generating mechanism, a water supplying rising mechanism and a power generating station mechanism are included; the circulating power generating mechanism comprises a spiral power generator, a cylindrical water collecting pond, a spiral impeller and a water entering channel; water naturally flows into the cylindrical water collecting pond, and the spiral impeller is driven to rotate; mechanical energy is converted into electric energy through the spiral power generator; the water supplying rising mechanism comprises an upper water storing pond, a lower water storing pond and the injection pump; the injection pump is arranged in an inner containing cavity betweenthe upper water storing pond and the lower water storing pond; the injection pump is directly connected into the lower water storing pond to suck water through a connected water sucking pipe; the middle portion of an empty tank of the injection pump is connected with a water rising pipeline to a final point of a lift height; the power generating station mechanism is provided with power generatorsat the top end of the water supplying rising mechanism, and a water guiding pipeline is connected with each layer of power generator; and discharged water then flows back to water flow to be cyclically used. The static water rising circulating power generating system based on the injection pump effectively solves the energy crisis, and is low in cost and manufacturing cost and long in service life; and good economic benefits and good practical value of popularizing and using are achieved.

The invention discloses an automatic photovoltaic power station power generation control method. The method comprises steps that active target value correction is carried out through considering active loss conditions, on the basis of scheduling issued active target values, active loss compensation amount correction is additionally carried out to acquire new active target values; actual power generation capacity of each inverter is calculated; a grid connected electricity price is considered, in combination with the actual power generation capacity of each inverter, the active target values are distributed, instructions are further issued, distribution is carried out according to the actual power generation capacities of the inverters, after an active target value of each inverter is acquired through distribution calculation, active target value instructions are issued to each inverter for execution; the target values are dynamically adjusted and controlled according to execution conditions, execution conditions of each inverter are tracked, if power adjustment of the inverters is not in place, power generation capacities of the inverters are updated, and active target value distribution calculation and instruction issuing are carried out for another time. The method is advantaged in that power generation benefits of a photovoltaic power station can be effectively improved, andthe regulation and control management level of power scheduling for the photovoltaic power station is improved.

The invention discloses a microgrid operation optimization method and system containing an electric automobile power conversion station under consideration of demand side response. Firstly, the air pressure in an air storage chamber is obtained by measuring the mass flow flowing into and out of an advanced adiabatic compressed air energy storage air storage chamber so as to determine the energy storage characteristic of the advanced adiabatic compressed air energy storage; a power battery power conversion station is introduced, wherein the power battery power conversion station is used for carrying out electric energy conversion with a microgrid on one hand and is also used as a transferable load on the other hand; and under the demand side respond, load transfer is dispatched according tothe type of the load and the transfer-in and transfer-out amount of the transferable load, the valley-time load of photovoltaic output power is transferred to the peak time, the advanced adiabatic compressed air energy storage is controlled, and the power battery power conversion station is controlled to charge and discharge the microgrid, so that the photovoltaic output power is close to predicted output power of the load. According to the method and the system, the system gain can be maximized, the photovoltaic power generation utilization rate can be increased, the energy storage capacityconfiguration can be optimized, and the renewable energy utilization rate can be improved.

The invention discloses an automatic power generating control method for a wind farm. Firstly, the method considers active loss situations and corrects an active target value issued by a scheduler. Secondly, the method considers the practical power generating capability of each fan group and carries out active distribution calculation and instruction issuing, so that the practical power generating capability of each fan group is taken into consideration fully during distribution, and active instructions of each fan group are obtained and set to the fan group. Finally, a control instruction is dynamically adjusted according to execution situations, and the execution situation of each fan group is tracked. If fan group power adjustment is not enough, distribution calculation is conducted again according to the adjustment capability of each fan group. The active instructions of each fan group are dynamically adjusted, so that the fan groups capable of adjustment undertakes extra power adjustment tasks. The method effectively increases the power generating benefits of the wind farm, improves the regulating management level of the wind farm by a power grid scheduler, and improves the wind power generating utilization rate.

The invention discloses a photovoltaic system control method, system and device and a photovoltaic system.According to the scheme, the generating capacity of a generating device is adjusted in real time according to the generating capacity of the generating device and the electricity consumption of an electricity consumption device, when the difference value of the generating capacity and the electricity consumption is not within a preset range, it is judged that countercurrent possibly exists, and at the moment, the countercurrent situation is judged to exist; and the power generation amount of the power generation device is controlled to be reduced, so that the countercurrent phenomenon is prevented, the power generation utilization rate of the photovoltaic system is improved, and the safety and reliability in the working process are improved.

The invention discloses a high-reliability low-loss alternating-current voltage-stabilizing power supply method and device for a communication base station. The method comprises the following steps: (1) converting a three-phase four-wire power supply of a communication base station into a single-phase two-wire power supply; (2) setting a standby power supply and mains supply switching device, andswitching to a standby power supply when the power grid fails; (3) converting the three-phase four-wire transmission electric energy into single-phase two-wire transmission electric energy; (4) setting a wide-range bidirectional voltage-regulating transformer, and controlling switching of voltage taps of the transformer by a power electronic switch; (5) enabling a dynamic reactive power compensation device to control the reactive power of the input end of the regulating transformer; and (6) dividing the single-phase two-wire power supply into two groups of power supplies for supplying power, one group of voltage-regulating power supply single-phase load and the other group of split-phase power supply three-phase load. The device comprises a power supply conversion device, a power supply switching device, a single-phase two-wire electric energy transmission device, a dynamic voltage regulation device, a reactive power compensation device and a hybrid power supply device. The invention has the advantages of high electric energy utilization rate, low failure rate and small influence of load characteristics on safe operation.