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 exciterby 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 absorband 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 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 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 discloses an energy storage SOC optimization control method in a wind storage system. According to predicted power of a wind power farm in a period of time in the future, a particle swarm algorithm is used for solving an SOC optimization model to obtain the optimal SOC range of an energy storage system in the running process of the wind storage system; according to real-time charge states, the charge state migration proportion relative to the optimal SOC range is obtained, the charge state migration proportion and the set power at the current moment of the energy storage system are used as input, a filtering time constant is used as output, a fuzzy control strategy is used for adjusting the filtering time constant in real time, and grid-connection power is stabilized through low-pass filtering of real-time power of the wind power farm. According to the energy storage SOC optimization control method, the SOC of the energy storage system is adjusted in advance according to the predicted power of the wind power farm, therefore overcharging and overdischarging phenomena are avoided, and the output power of the wind power farm is smoothened for a long time.