1.智能配用电装备与系统全国重点实验室(天津大学),天津 300072
2.许继电气股份有限公司,河南 许昌 461000
何佳伟(1991 —),男,教授,博士研究生导师,主要研究方向为柔性交直流电网保护控制、新能源电力系统保护控制(E-mail:hejiawei_tju@126.com);
薛 峰(2000 —),男,硕士研究生,主要研究方向为储能并网系统故障分析与继电保护(E-mail:1376247631@qq.com);
李 斌(1976 —),男,教授,博士研究生导师,通信作者,主要研究方向为电力系统保护与控制(E-mail:libin_tju@126. com)。
收稿:2025-06-10,
修回:2025-12-01,
网络首发:2025-12-30,
纸质出版:2026-10-10
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何佳伟,薛峰,李旭等.储能电站并网线路功率方向元件的适用性分析及可行域计算[J].电力自动化设备,2026,46(10):95-104.
He Jiawei,Xue Feng,Li Xu,et al.Applicability analysis and feasible region calculation of power directional element for grid-connected line of energy storage power station[J].Electric Power Automation Equipment,2026,46(10):95-104.
何佳伟,薛峰,李旭等.储能电站并网线路功率方向元件的适用性分析及可行域计算[J].电力自动化设备,2026,46(10):95-104. DOI: 10.16081/j.epae.202512027.
He Jiawei,Xue Feng,Li Xu,et al.Applicability analysis and feasible region calculation of power directional element for grid-connected line of energy storage power station[J].Electric Power Automation Equipment,2026,46(10):95-104. DOI: 10.16081/j.epae.202512027.
大容量储能电站接入交流电网时,受充/放电工作模式和控制策略影响,其故障特性区别于传统同步机系统和风光新能源并网系统,因此会对功率方向元件等保护原理的动作性能产生影响。基于储能电站的充/放电工作模式和控制策略,分析了储能电站并网线路发生故障后的电压、电流相量特征,及其对功率方向元件动作特性的影响机理。在此基础上,提出了一种基于粒子群寻优的功率方向元件可行域边界定量计算方法,实现了储能电站并网线路功率方向元件适应极限的准确求取。基于PSCAD/EMTDC仿真平台进行仿真验证。结果表明,储能电站运行在充电模式时功率方向元件出现不正确动作的风险较高。此外,提出的功率方向元件可行域边界计算方法具有良好的正确性和精确性。
When the large-capacity energy storage power station is connected to the AC power grid,its fault characteristics differ significantly from those of traditional synchronous machine systems and wind-solar new energy systems due to the influence of charging/discharging working modes and control strategies,thereby affecting the performance of protective devices such as power directional elements. Based on the charging/discharging working modes and control strategies of the energy storage power station,the voltage and current phasor characteristics after the fault of the grid-connected line of the energy storage power station,and its influence mechanism on the action characteristics of the power directional element are analyzed. On this basis,a quantitative calculation method based on particle swarm optimization is proposed to determine the feasible region boundary of the power directional element,which realizes the accurate calculation of the adaptive limit of the power directional element of the grid-connected line of the energy storage power station. Simulation verification is carried out based on PSCAD/EMTDC simulation platform. The results show that the risk of incorrect action of the power directional element is high when the energy storage power station works in the charging mode. In addition,the proposed feasible region boundary calculation method of power directional element has good correctness and accuracy.
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