41results about How to "Smooth output power" patented technology

The invention discloses a method for controlling energy storage type wind power station control with a synchronization property, belonging to the technical field of wind power generation control. The method is characterized in that an energy storage battery system is configured at the alternating current side of the wind power station, a control strategy based on a synchronous generator model is adopted for the inverter of the energy storage battery system, and the wind power station and the energy storage battery system are equivalent to a virtual synchronous generator, thus the wind power station has a synchronization interface property. By utilizing the method disclosed by the invention, the output power of the wind power station is smooth, and the influence of the output power fluctuation of the wind power station on the power network frequency is reduced effectively; and the property of a synchronous generator is embodied to a power network, the system power balance can be maintained automatically according to the system loading fluctuation, thus the system voltage frequency is stable.

The invention discloses a variable pitch and variable speed wind generating set, comprising a three-blade wind turbine for collecting wind energy. A wheel hub of the three-blade wind turbine is internally provided with a variable pitch device; a main shaft of the three-blade wind turbine is connected with a speed-increasing box which is connected with a synchronous generator with a coaxial exciter by a coupler; and the variable pitch device and the synchronous generator are connected with a PLC control panel which is used for controlling the connected variable pitch device to adjust blade angle, thus adjusting an output power value of the generator. The wind generating set adopts the combination of a variable pitch controller and a power controller, completes optimization to the output power of the set and leads the set to operate in optimal state, thus obtaining maximum wind energy utilization ratio and improving the generating efficiency of the set. The wind generating set can absorb and release transient wind energy, has smooth and stable output power of the set, good electric energy quality and small shock to load of a transmission mechanism. A frequency converter has high reliability and the cycle operation speed of a main controller of the wind generating set is high.

The invention relates to a method for controlling charging and discharging of an energy storage system in a wind power plant based on Kalman filtering, and belongs to the technical field of controlling over power systems. The method comprises the steps of firstly calculating a prior estimated value of the combined output power of a wind power generation system and the energy storage system in the wind power plant at the time k, and a prior estimated value of the calculation error covariance, calculating the current power fluctuation quantity of the wind power generation system, determining an observation noise covariance value according to the current power fluctuation quantity, correcting the prior estimated value of the combined output power according to a measured value of the power of the wind power generation system at the time k, obtaining a posterior estimated value and a posterior estimated value of the calculation error covariance, and calculating the upper limit and the lower limit of the output power of the energy storage system in the wind power plant at the time k according to the residual energy and the limit value of the output power of the energy storage system. According to the method, the condition of wind power fluctuation and the condition of the energy and power of the energy storage system are considered comprehensively, and parameters of a filer are adjusted in a self-adaption mode so that the better filtering effect can be achieved, and meanwhile the needed capacity of the energy storage system can be reduced.

The invention provides an environment-friendly efficient intelligent wind power generation system. Wind shields are arranged, and an air guide groove is formed between the two wind shields to guide wind to flow out of the side face, so that the wind energy utilization rate is better increased, and a larger torque force is also achieved. Wind from the side face is shielded, a horizontal transmission shaft is driven to rotate under the action of wind force, and the wind power utilization efficiency is further improved. In addition, the system can adapt to any-time changes of the wind direction.Wind shields capable of partially covering side frames are further arranged, so that the wind which is inclined towards the side face is conveniently blown into impellers, the impellers are driven torotate, and the wind power conversion efficiency is improved; and a wind adjusting plate is arranged, the counteractive wind is blocked and prevented from entering the impellers, the useless work is prevented, and the wind power conversion efficiency is improved. The wind power generation system is low in manufacturing cost, small in occupied space, convenient to transport, more environment-friendly and low in noise, does not cause damage to flying birds near a wind field and can generate electricity through breeze, and the generating capacity under the same wind field condition is 3-6 times that of the horizontal axis.

The invention discloses a photovoltaic power adjustment method, a photovoltaic power adjustment device, photovoltaic power adjustment equipment and a computer readable storage medium. The photovoltaicpower adjustment method comprises the steps of: calculating output power of a photovoltaic power station at each prediction point; calculating a target output power value of the photovoltaic power station during a prediction period according to the output power of each prediction point, and an operating state and power data of an FSC variable speed pumped storage unit; calculating a power instruction value of the FSC variable speed pumped storage unit according to the target output power value, real-time power of the photovoltaic power station and the power data of an FSC variable speed pumped storage unit; and transmitting the power instruction value to the FSC variable speed pumped storage unit, so that the FSC variable speed pumped storage unit stabilizes the photovoltaic power stationfor one time. The photovoltaic power adjustment method, the photovoltaic power adjustment device and the photovoltaic power adjustment equipment utilize the rapid adjustment capability of active power of the FSC variable speed pumped storage unit to stabilize the output power of the photovoltaic power station for one time, so as to obtain relatively smooth output power, thereby reducing the fluctuations of the output power.

The invention discloses an electric power system energy storage control method of large-scale photovoltaic access. The method comprises following steps that step 1, a photovoltaic power station is connected into a power transmission network and a power distribution network according to output voltage grade, a power-type energy storage system is configured in the power distribution network and an energy-type energy storage system is configured in the power distribution network; step 2, the power-type energy storage system adopts a double moving average algorithm to calculate an energy storage charging and discharging strategy, and stabilize short-time fluctuation of output power of the photovoltaic power station accessed to the power distribution network; and step 3, the energy-type energy storage system firstly carries out power generation detection on the photovoltaic power station accessed to the power transmission network and the power distribution network, carries out load prediction on the load accessed to the power distribution network so as to obtain a predicted photovoltaic output curve and a predicted load curve, then adopts a prediction control method, makes a daily operation plan, stores energy during photovoltaic power releasing period and generates power during load period at night.

This invention discloses motor vehicle automatic transmission. It includes machine case; power input shaft; power output shaft and input rotation rate sensor connected with power input shaft. There are at least two speed changing mechanisms in the machine case. The input gear of speed changing mechanism gear cluster connects to the passive end of clutch. The active end of clutch connects to power input shaft. The output gear of gear cluster connects to power output shaft. There is output rotation rate sensor on the output end of power output shaft. The external part of machine case is arranged with clutch brushes which are respectively connected with speed changing mechanism clutches. The output power of this invention is smooth, which makes the vehicle better adaptability to roads. This invention also makes the machine long life span. It can be applied on booster device such as motor traveling car, motor tricycle and motor vehicle.

A method for improving the utilization rate of wind power by using hybrid energy storage. The method combines a battery pack, a flywheel energy storage, a supercapacitor, and a pumped storage power station into a hybrid energy storage device, which is divided into a DC part and an AC part to be applied to a wind farm, and uses an energy management system to formulate strategies to control the charging-discharging of the hybrid energy storage device and improve the utilization rate of wind power. The battery pack, the flywheel energy storage, and the supercapacitor form the DC part. The pumpedstorage power station forms the AC part. The energy-type and power-type energy storage devices are combined to further improve the overall performance of the energy storage device. Wind-driven generation power fluctuation is non-linear and is coverted according to the Hilbert frequency to calculate the low-frequency, intermediate-frequency and high-frequency fluctuations, which correspond to the power distribution among the battery pack, the flywheel energy storage, and the super capacitor of the DC part so as to stablize the real-time output fluctuation of the wind farm and improve power quality. When the wind power has a large fluctuation rate, the storage capacity of the pumped storage power station with a large capacity is used for peak shaving, which directly improves the utilizationrate of wind power. The hybrid energy storage device can effectively suppress the wind power fluctuation, achieves peak shaving, and finally achieve the purpose of improving the utilization rate of wind power.

The invention discloses a low-energy-consumption pressure-controllable hydrogen production and supply device, and the device comprises a water adding tank, a water conveying pipeline, a first water storage chamber, a reaction chamber, a second water storage chamber, a spring chamber and a gas conveying pipeline. According to the device, hydrogen is prepared through a chemical reaction generated after a hydrogen production material and an aqueous solution are mixed, the reaction process is controlled according to the principle of a Kipp generator, and meanwhile, a spring chamber is additionallyarranged to pressurize the generated hydrogen, so the prepared hydrogen can be directly supplied to a fuel cell for use. And according to the hydrogen production pressure constraint equation providedby the invention, the hydrogen production pressure of the hydrogen production equipment can be changed by adjusting a series of parameters. The device does not need participation of monitoring and control elements, extra system energy consumption is avoided, the hydrogen production process is safe and controllable, and the application range is wider. The invention further provides a portable fuelcell power generation system loaded with the hydrogen production and supply device, and instant hydrogen production, supply and power generation are achieved.

The invention discloses a wind power blade. The wind power blade is formed by three layers of materials. The first layer is a glass fiber fabric layer. The second layer is a carbon fiber layer. The third layer is a glass fiber fabric layer. A +/-45-degree angle is formed by the glass fiber fabric layer in the first layer and the glass fiber fabric layer in the third layer, and the carbon fiber layer in the second layer is clamped between the glass fiber fabric layer in the first layer and the glass fiber fabric layer in the third layer. Carbon fibers are used, therefore, the weight of the wind power blade is reduced, the rigidity is improved, the aerodynamic performance of the wind power blade is improved, and loads on a tower and a blade shaft are reduced. Therefore, the output power of a fan is smooth and balanced, and the energy efficiency is improved. Meanwhile, the carbon-fiber blade is thin, the appearance design is effective, the wind power blade is thin and long, and the energy output efficiency is also improved.

The invention belongs to the field of battery control, and provides a multi-stack fuel cell control method, a control device, a system and a vehicle. The control method comprises the following steps that in a starting time period of a multi-stack fuel cell, the currently required power is averagely distributed to each fuel cell stack; in an operation time period after the multi-stack fuel cell is started, the aging degree of the corresponding stack at the current moment is obtained according to the magnitude of the output voltage of each fuel cell stack, and then the power variable at the next moment is allocated to each fuel cell stack according to the aging degree and the variation of the required power at the next moment, so that, the aging degrees of the multiple stacks of fuel cells tend to be consistent.

The invention discloses a photovoltaic-energy storing joint power generation system, which comprises a photovoltaic device and an energy storing device, wherein the photovoltaic device is connected with the power grid for converting solar energy to AC with the same frequency and the same phase as the power grid and the AC is transmitted to the power grid; the energy storing device is connected with the power grid and has a charging mode and a discharging mode; when the energy storing device is in the charging mode, the energy storing device acquires the AC from the power grid, the AC of the power grid is converted to DC and the DC is stored; when the energy storing device is in the discharging mode, the energy storing device converts the self-stored DC to the AC with the same frequency and the same phase as the power grid, and the AC is transmitted to the power grid; and the energy storing device is also connected with the photovoltaic device for monitoring working states of the photovoltaic device and the power grid, and the self working mode is switched according to the monitoring result. The photovoltaic-energy storing joint power generation system and the power grid are matched for power generation in the peak period of electricity consumption, purposes of achieving smooth photovoltaic output power and peeling peak and filling valley can be realized, and stable operation of the power grid and balance of power supply and power use are ensured.

The invention discloses a high-efficiency wind generator system and a control method thereof. The system comprises a laser radar wind meter arranged on a cabin and a mechanical-hydraulic (secondary adjustment) hybrid transmission system arranged in the cabin; the mechanical-hydraulic hybrid transmission system comprises an impeller, a speedup planetary gear, a diversion and confluence device, a synchronous generator, a speed regulation hydraulic system and a secondary adjustment system; the impeller is connected with an input shaft of the speedup planetary gear train; the diversion and confluence device comprises a first gear pair, a planetary gear and a second gear pair; the planetary gear comprises a planet carrier, a sun gear and a tooth ring; the speed regulation hydraulic system comprises a variable hydraulic pump, a quantitative hydraulic motor and a fuel tank; the secondary adjustment system comprises a secondary component and an accumulator; and the secondary component is coaxially connected with the quantitative motor. The laser radar wind meter and the mechanical-hydraulic hybrid transmission system enable high efficiency and smooth output power of the wind generator system by wind signal processing and corresponding control motions.

The invention relates to a capacity configuration method of a wind-storage combined system. A wind-electricity output power is processed by Kalman power decomposition to extract a wind-electricity grid-connected power part and an energy storage device suppressing power part. According to the operation complementary characteristic of a storage battery and a super capacitor, a low-frequency region and a high-frequency region of the energy storage device suppressing power part are suppressed, thereby carrying out configuration of the energy storage capacity of the wind-storage combined system.

The invention relates to a combined power generation system which comprises: a wind power generation system; a photovoltaic power generation system; an energy storage system which is used for storingredundant electric energy of the wind power generation system and the photovoltaic power generation system and providing the electric energy when the power supply of the wind power generation system and the photovoltaic power generation system is insufficient; an energy management system which is connected with the wind power generation system, the photovoltaic power generation system and the energy storage system, and is used for adjusting the energy storage system to charge and discharge according to the predicted electric energy output by the wind power generation system and the photovoltaic power generation system and the electric energy required by the load; a converter which is connected with the wind power generation system, the photovoltaic power generation system and the energy storage system; and a grid-connected inverter which is connected with the converter and the power grid bus. According to the technical scheme, the energy storage system with good performance is configured in the wind-solar combined power generation system, so that the increasingly prominent consumption problem can be effectively solved, the wind-solar resource utilization rate is improved, the wind-solar combined power generation output power is smoothened, and the adverse effects of power generation volatility and randomness on a power system are reduced.

The invention discloses a multi-energy system capacity optimization method based on a hydrogen-heat hybrid energy storage device. The invention belongs to the technical field of multi-source energy storage of multi-energy systems. According to the method, the source-load characteristics and the advantages and disadvantages of a hydrogen storage device and a heat storage device are fully combined,the hydrogen storage device and the heat storage device are combined to form a hydrogen-heat hybrid energy storage system, and when source output of a multi-energy system cannot meet the load requirement, a hydrogen-oxygen fuel cell and temperature difference power generation are adopted for supplementing the vacancy electric energy. According to the invention, the capacity optimization configuration model taking the investment cost of the hydrogen-heat hybrid energy storage device as the target function is established based on the hydrogen storage device model, the heat storage device model and the net load power, and the optimal energy storage capacity configuration is optimized by adopting the artificial ant colony algorithm, so that the investment cost can be reduced on the premise ofensuring the reliable energy supply of the system.

The invention relates to a fan power smoothing method based on DC bus voltage. The method comprises the following steps: acquiring a smooth change range of DC bus voltage; based on the smooth change range of the direct-current bus voltage, performing analyzing according to a maximum value calculation formula of a time constant tau to obtain an allowable maximum value of the time constant tau; performing analyzing according to a direct current bus voltage reference value calculation formula based on the allowable maximum value of the time constant tau by adopting a time segmentation control mode, and determining a direct current bus voltage reference value; and controlling the direct current bus voltage according to the direct current bus voltage reference value, so the output power of the smoothing fan system is realized, the smoothing quantity can be accurately tracked, the response control can be quickly performed when the fan is started, the output power of the fan can be effectively smoothed, and the accuracy of the smoothing power is improved.