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基于IIDG电流相位控制的配电网故障电流抑制方法
李桓1, 彭克1, 张新慧1, 柳劲松2, 徐丙垠1, 赵艳雷1
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
摘要:
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。
关键词:  逆变型分布式电源  故障电流抑制  电流相位控制  同步相量测量  继电保护
DOI:10.16081/j.epae.201909030
分类号:TM77
基金项目:国家重点研发计划项目(2017YFB0902800);山东省自然科学基金资助项目(ZR2017LEE022)
Fault current suppression method for distribution network by controlling IIDG current phase
LI Huan1, PENG Ke1, ZHANG Xinhui1, LIU Jingsong2, XU Bingyin1, ZHAO Yanlei1
1.College of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China;2.State Grid Electric Power Research Institute, SMEPC, Shanghai 200437, China
Abstract:
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.
Key words:  inverter interfaced distributed generation  fault current suppression  current phase control  synchronous phasor measurement  relay protection

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