1.山东理工大学 电气与电子工程学院,山东 淄博 255000
2.国网上海市电力科学研究院,上海 200437
李 桓(1994—),男,山西大同人,硕士研究生,主要研究方向为含分布式电源的配电网故障特性(E-mail:lhsdut17@163.com);
彭 克(1983—),男,山东淄博人,副教授,博士,通信作者,主要研究方向为分布式发电系统,交直流配电网(E-mail:pengke@ sdut.edu.cn);
张新慧(1971—),女,山东莱阳人,教授,博士,主要研究方向为电力系统继电保护(E-mail:zhxh626@126.com)。
收稿:2019-01-04,
修回:2019-08-07,
纸质出版:2019-09-10
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李桓,彭克,张新慧等.基于IIDG电流相位控制的配电网故障电流抑制方法[J].电力自动化设备,2019,39(09):180-186.
LI Huan,PENG Ke,ZHANG Xinhui,et al.Fault current suppression method for distribution network by controlling IIDG current phase[J].Electric Power Automation Equipment,2019,39(09):180-186.
李桓,彭克,张新慧等.基于IIDG电流相位控制的配电网故障电流抑制方法[J].电力自动化设备,2019,39(09):180-186. DOI: 10.16081/j.epae.201909030.
LI Huan,PENG Ke,ZHANG Xinhui,et al.Fault current suppression method for distribution network by controlling IIDG current phase[J].Electric Power Automation Equipment,2019,39(09):180-186. DOI: 10.16081/j.epae.201909030.
我国配电网正面临着高渗透率分布式电源接入的挑战,配电网的拓扑结构与潮流方向发生了本质改变,易导致继电保护装置产生拒动或者误动。针对分布式电源大多通过电压源型逆变器并网这一现状,提出了基于逆变器电流相位控制的故障电流抑制方法,在
dq
坐标系下对逆变器输出电流相位进行控制,使得流过继电保护装置的故障电流幅值近似等于电网侧的短路电流,消除逆变型分布式电源提供的短路电流对继电保护装置的影响,减少继电保护装置的升级需求。在DIgSILENT/PowerFactroy仿真软件中搭建IEEE 13节点系统,仿真结果验证了所提控制策略的正确性及有效性。
The distribution network in China is facing the challenge of high penetration of distributed gene-ration integrated. As a result,the topology and power flow direction of the distribution network have been changed,which easily causes misoperation or maloperation of the relay protection devices. The distributed generations are mostly connected to the distribution network by voltage sources inverters,so a fault current suppression method based on the inverter current phase control is proposed. The phase of the inverter output current is controlled in the
dq
reference frame,which makes the fault current amplitude of the relay protection device approximate to the short circuit current of the grid side. By this way,the influence of short circuit current supplied by IIDG(Inverter Interfaced Distributed Generation) on relay protection devi-ces is eliminated,therefore,the demands for the upgrade of the relay protection devices can be reduced. The correctness and effectiveness of the proposed control strategy is verified by the IEEE 13-bus system in DIgSILENT/PowerFactroy.
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