中国电机工程学报2025，Vol.45Issue(4)：1409-1423,中插15,16.DOI:10.13334/j.0258-8013.pcsee.231796
一种基于附加谐波电流信号的主动配电网线路保护方法
An Additional Harmonic Current Based Line Protection Method of Active Distribution Network
摘要
Abstract
With the penetration of inverter-interfaced distributed generators(IIDGs)raised,the fault characteristics of distributed network have also changed.Affected by the current limiting of power electronics and converter control strategies,the amplitude of fault current is weakened and the characteristics of fault become complex,rendering traditional protection schemes potentially.Hence,this paper proposes a line protection scheme of distribution network based on additional harmonic current.Based on the flexible and controllable characteristics of the IIDGs,the proposed method actively injects a harmonic current signal into the protection system after a fault by changing the amplitude limiting control of IIDG.Meanwhile,considering the influence of this harmonic signal on the control of IIDG,a corresponding filter is designed.Further,a new protection criterion is constructed based on the amplitude of this harmonic current signal and its phase relationship with the protection positive sequence measurement voltage.A 10 kV active distribution network case study is simulated in PSCAD/EMTDC,and the results verify that the proposed protection scheme can operate correctly and rapidly under both symmetrical and asymmetrical faults.关键词
主动配电网/变限幅控制/谐波电流注入/线路保护/新型方向判据Key words
active distribution network/variable current limit control/harmonic current inject/line protection/novel directional criterion分类
信息技术与安全科学引用本文复制引用
邓靖雷,姚良忠,徐箭,程帆,毛蓓琳,陈汝斯..一种基于附加谐波电流信号的主动配电网线路保护方法[J].中国电机工程学报,2025,45(4):1409-1423,中插15,16.基金项目
国家电网公司科技项目(高比例新能源电力系统有功频率控制基础理论研究,5100-202199273A-0-0-00). Science and Technology Project of State Grid Corporation of China(Researchon the Basic Theory of Active Power Frequency Control for Power Systemintegrated with High Penetration Renewable Energy,5100-202199273A-0-0-00). （高比例新能源电力系统有功频率控制基础理论研究,5100-202199273A-0-0-00）
