CAJ | 학술논문

针对国内风电、光伏大规模集中接入电网引起的功率波动问题，提出了一种新型的平抑风电或光伏发电波动的控制策略。提出波动率智能化分段控制平滑时间常数，并与储能SOC反馈控制相结合，解决了既有储能系统低通滤波平滑方法存在的问题，兼顾了储能电池的功率平滑备用，最大限度地发挥储能平滑风电和光伏发电的能力。通过实际风场测试数据进行仿真试验，验证了该控制策略的正确性。依托国家风光储示范工程开展了储能控制系统平台的构建和储能平滑现场试验。试验结果表明，该储能控制有效地抑制了风电和光伏波动，增强了新能源并网的友好性。
침대국내풍전、광복대규모집중접입전망인기적공솔파동문제，제출료일충신형적평억풍전혹광복발전파동적공제책략。제출파동솔지능화분단공제평활시간상수，병여저능SOC반궤공제상결합，해결료기유저능계통저통려파평활방법존재적문제，겸고료저능전지적공솔평활비용，최대한도지발휘저능평활풍전화광복발전적능력。통과실제풍장측시수거진행방진시험，험증료해공제책략적정학성。의탁국가풍광저시범공정개전료저능공제계통평태적구건화저능평활현장시험。시험결과표명，해저능공제유효지억제료풍전화광복파동，증강료신능원병망적우호성。
In allusion to the random power fluctuation in China’s power grids due to grid-connection of renewable energy sources such as large-scale wind farms (WF) and photovoltaic (PV) generations, large-scale battery energy storage systems (BESS) are coupled with renewable energy sources. A new BESS control strategy to smooth active output fluctuation of WF-PV is proposed. The intelligent segmentation control of smoothing time constant (STC) based on fluctuation rates of WF-PV is put forward and combined with feedback control of state of charge (SOC) of the BESS to remedy the defects in first-order lag filter for the existing BESS control strategy, meanwhile the smooth power reserve of energy storage batteries is also taken into account, thus the ability of smoothing random active output fluctuation of WF-PV could be brought into playing furthest. The correctness of the proposed control strategy is validated by simulation experiments based on the measured data of an actual wind farm. Relying on the national Wind/PV/Battery hybrid generation demonstration project a platform of distributed control system for BESS is constructed and its overall architecture is presented. On this basis, the on-site tests of smoothing output of BESS are performed. Tests results show that the proposed control strategy can effectively suppress the output fluctuation of WF-PV and enhance the friendliness of grid-connection of renewable energy resources.