电网技术2019，Vol.43Issue(5)：1632-1639,8.DOI:10.13335/j.1000-3673.pst.2018.2017
方向元件在光伏电站送出线路中的适应性分析
Adaptability Analysis of Directional Relay for Transmission Line Out-sending from Photovoltaic Power Plant
摘要
Abstract
Due to fragility of power electronic devices and controllability of grid-connected inverters, photovoltaic power plants change the fault current characteristics of transmission lines, resulting in adaptability problems for various directional relay based on traditional synchronous power supply fault characteristics. Taking into account different control targets and fault types, the phasor expression of the fault current of PV side in transmission line is derived. Based on the phasor expression of the fault current, the expressions of the positive- and negative-sequence mutation impedance angle and the phase relationship of the phasor fault components under different control targets are deduced. Then the effects of active and reactive power reference, control target, voltage unbalance degree and other factors on the performance of the direction relay based on sequence fault components and the direction relay based on phasor fault components are studied deeply. In PSCAD/EMTDC, a photovoltaic power plant simulation platform is built to test and validate the influence of various factors on the directional relays and adaptability problems of traditional directional relay.关键词
方向元件/方向比较式纵联保护/故障电流特性/适应性分析/光伏电站Key words
directional relay/directional comparison pilot protection/fault current characteristics/adaptability analysis/PV power plant分类
信息技术与安全科学引用本文复制引用
许冠军,梁营玉,查雯婷,霍姚彤,秦晓童,王聪..方向元件在光伏电站送出线路中的适应性分析[J].电网技术,2019,43(5):1632-1639,8.基金项目
国家自然科学基金项目(51707193,61703405) （51707193,61703405）
中央高校基本科研业务费资助项目(2017QJ05). （2017QJ05）
