首页|Study on ESS Control Strategy for Distribution Network with PV
Study on ESS Control Strategy for Distribution Network with PV
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Environmentally clean photovoltaic (PV) generation has found wider application,but the power fluctuation generated from PV can negatively impact the operation of power system.A properly designed energy storage system (ESS) can stabilize power system by absorbing and injecting instantaneous power.Suitable control strategy of ESS is studied in order to accommodate the power fluctuation.It adopts negative feedback which considers the relationship between real power and voltage in the distribution network because resistor is comparable to reactance of the lines in the distribution network.A universal model of ESS is established,the characteristic parameters such as time-delay of system response,limitation of charging and discharging and restraint of energy storage capacity are taken into account.The validity of the proposed model is verified by user-defined modules in power system analysis software package (PSASP).The operation of PV generation at Wuhan Railway Station in both grid-connected mode and island mode at Wuhan Railway Station is analyzed in detail.The performances of the local distribution network with PV under different weather conditions are summarized,and the key parameter of ESS suitable for PV generation at Wuhan Railway Station is also recommended.
power fluctuationenergy storage system (ESS)control strategyisland mode
Li Yan、Jing Panpan、Yang Minjing、Zhang Buhan、Mao Chengxiong
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Huazhong University of Science and Technology
Key Project of National Natural Science Foundation ChinaNational Basic Research Program (973 Program)
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