电网技术2013，Vol.37Issue(2)：557-561,5.
逆变型分布式电源并网系统的失步保护研究
Out-of-Step Separation Protection of Inverter-Based Grid-Connecting System for Distributed Generation
赵杰 1张艳霞 1宣文博 1童锐 1田斌1
作者信息
- 1. 智能电网教育部重点实验室(天津大学),天津市南开区300072
- 折叠
摘要
Abstract
In allusion to the out-of-step fault occurred in inverter-based grid-connecting system for distributed generation, the differences between the out-of-step fault occurred in traditional power grid composed of rotating generators and that occurred in inverter-based grid-connecting system for distributed generation are analyzed, and a new principle for out-of-step separation protection for inverter-based grid-connecting system for distributed generation is proposed. Firstly, the absolute value of apparent impedance angle deviation at the point of common coupling (PCC) is utilized to construct the tripping criterion and out-of-step separation criterion respectively; secondly, the absolute value of variation acceleration of apparent impedance angle is used to judge the out-of-step state. A model of grid-connected three-phase photovoltaic (PV) power system is built by MATLAB/SIMULINK to simulate the three-phase short-circuit fault and out-of-step fault. Simulation results show that the proposed new principle for out-of-step separation protection is correct and the principle is clear, the three-phase short-circuit fault occurred in inverter-based grid-connecting system for distributed generation can be precisely distinguished from the out-of-step fault, and the proposed protection principle is not affected by three-phase short-circuit fault occurred in inverter-based grid-connecting system for distributed generation.关键词
分布式电源/并网系统/失步解列/视在阻抗角Key words
distributed generation/ grid-connecting system/out-of-step separation/ apparent impedance angle分类
信息技术与安全科学引用本文复制引用
赵杰,张艳霞,宣文博,童锐,田斌..逆变型分布式电源并网系统的失步保护研究[J].电网技术,2013,37(2):557-561,5.
