高电压技术2024，Vol.50Issue(3)：1122-1130,中插14-中插15,11.DOI:10.13336/j.1003-6520.hve.20230843
输电网故障时新能源并网点电压跌落及影响范围计算方法
Calculating Method of the Voltage Sag at Point of Interconnection and Affected Range of Re-newable Energy Under the Faults in Transmission Network
摘要
Abstract
In order to solve the issue of inability to evaluate the impact of power grid faults on renewable energy using the current power grid security and stability analysis,a method of calculating the voltage sag at point of interconnection(POI)and affected range of renewable energy under the faults in transmission network is proposed.Bounded by 220 kV nodes,fault voltage of 220 kV nodes is calculated by the improved fault calculation model considering the influence of current output characteristics of renewable energy.Based on the results,voltage at POI of renewable energy and the electrical distance between POI and fault point are calculated in typical scenarios for renewable energy integration into power grid.Finally,the proposed method is verified in the modified 39-node simulation system by comparison with traditional meth-od and time domain simulation.The results show that,the deviation of fault voltage calculated by the proposed method is within-4.82%～0.6%,so the proposed method can accurately evaluate the influence of faults in transmission network on re-newable energy.It can provide guidance for the optimization of renewable energy operation planning and control strategies.关键词
输电网/电网故障/新能源发电/并网点电压/故障电压计算/故障影响范围Key words
transmission network/grid fault/renewable energy power/voltage of POI/fault voltage calculation/affected range of fault引用本文复制引用
李子秀,陈宁,李建华,钱敏慧,罗凯明,曲立楠..输电网故障时新能源并网点电压跌落及影响范围计算方法[J].高电压技术,2024,50(3):1122-1130,中插14-中插15,11.基金项目
国家重点研发计划(2021YFB2400500) （2021YFB2400500）
国家电网有限公司华东分部科技项目(520800220005). Project supported by National Key R&D Program of China(2021YFB2400500),Research Program of East China Branch of SGCC(520800220005). （520800220005）
