Adaptive distance protection scheme for a distribution network given access of inverter power supply

被引：0
|
作者：
Chen X. [1 ]
Qin W. [1 ]
Yang L. [1 ]
Cai Y. [1 ]
Zuo P. [1 ]
机构：
[1] Shanxi Key Laboratory of Power System Operation and Control, Taiyuan University of Technology, Taiyuan
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2023年 / 51卷 / 11期
关键词：
adaptive distance protection; additional impedance angle; inverter-interfaced disturbed generators (IIDG); positive sequence fault current; real-short-circuit impedance;
D O I：
10.19783/j.cnki.pspc.221463
中图分类号：
学科分类号：
摘要：
A large number of inverter-interfaced distributed generators (IIDG) represented by photovoltaics and energy storage is connected to the distribution network. This greatly disturbs traditional distance protection, and at the same time there is the risk of refusal or misoperation. Thus this paper analyzes the composite sequence network under different types of faults in the IIDG distribution network, and uses the positive sequence fault component on the IIDG side to obtain the additional impedance angle under different faults. Combined with the complex plane relationship of impedance under fault, the short-circuit impedance corresponding to the fault position of the line is calculated, and a real short-circuit impedance solution method is obtained. An adaptive distance protection scheme suitable for the connection of inverter power supply is also proposed. The solution process uses the single-ended electrical quantity on the IIDG side to solve the problem that the distance protection is affected by the controlled characteristics of the IIDG fault output and the transition resistance. It is not affected by the change of the fault location while effectively reduces the communication cost of the network. The protection scheme is verified by a real time digital simulator (RTDS), and the results show that it has good selectivity and reliability under different types of faults. © 2023 Power System Protection and Control Press. All rights reserved.
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页码：27 / 38
页数：11
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