66 kV系统消弧线圈分散式补偿策略研究  

Research on Distributed Compensation Strategy of Arc Suppression Coil of 66 kV System

作　　者：李冠华 徐凯 栗罡 鲁旭臣 赵振威 李爽 LI Guanhua;XU Kai;LI Gang;LU Xuchen;ZHAO Zhenwei;LI Shuang(State Grid Liaoning Electrical Power Research Institute,Shenyang 110006,China;State Grid Liaoning Electrical Power Supply Co.,Ltd.,Shenyang 110006,China)

机构地区：[1]国网辽宁省电力有限公司电力科学研究院,沈阳110006 [2]国网辽宁省电力有限公司,沈阳110006

出　　处：《高压电器》2024年第12期103-112,共10页High Voltage Apparatus

基　　金：国家电网公司科技资助项目(2022YF⁃80)。

摘　　要：为保证66 kV谐振接地系统安全运行,需合理配置消弧线圈的阻尼电阻和脱谐度两个参数,然而分散式补偿运行使得参数设置变得困难。文中提出一种分散式补偿策略,该策略考虑残流、故障相电压恢复速度、故障后零序电压衰减残值以及位移度等核心指标,并通过实验的方式得到故障残流应小于7 A,故障相电压恢复速度应低于500 V/ms。在此基础上提出参数优化约束方程,利用梯度下降法获取脱谐度极大值及阻尼电阻的极小值参数。最后利用一实际66 kV谐振接地系统作为算例,仿真验证了所提补偿策略的有效性。For assuring safe operation of 66 kV resonant grounding system,such two parameters as the damping resis⁃tance and the detuning degree of the arc suppression coil need to be reasonably configured.However,the distributed compensation operation makes the parameter setting difficult.In this paper,a kind of decentralized compensation strategy is proposed,which considers such core data as residual current,recovery speed of faulty phase voltage,resid⁃ual value of the zero⁃sequence voltage decay after the fault,and the displacement degree.It is obtained by way of ex⁃periment that the faulty residual current shall be less than 7 A and the recovery speed of faulty phase voltage shall be lower than 500 V/ms.On this basis,the parameter optimization constraint equation is proposed,and the gradient de⁃scent method is used to obtain the maximum value of detuning degree and the minimum value parameters of damping resistance.Finally,an actual 66 kV resonant grounding system is used as an example to verify the effectiveness of the proposed compensation strategy by simulation.

关 键 词：66 kV谐振接地系统 脱谐度 阻尼电阻 参数校核 

分 类 号：TM862[电气工程—高电压与绝缘技术]