考虑电流保护动作的分布式电源选址定容和并网策略  

Locating and Sizing of DG and Grid-Connected Strategy Considering Current Protection

作　　者：张合栋 朱瑞婷 ZHANG Hedong;ZHU Ruiting(Jining Power Supply Company,State Grid Shandong Electric Power Company,Jining 272111,China)

机构地区：[1]国网山东省电力公司济宁供电公司,山东济宁272111

出　　处：《电工技术》2024年第24期83-88,共6页Electric Engineering

摘　　要：针对DG接入对配电网传统三段式电流保护的影响,提出了适用于旋转型DG和逆变型DG的并网策略。首先,在电流保护约束下分别对两种DG选址定容、准入容量进行研究,在旋转型DG并网处引入故障限流器、提高准入容量;其次,在传统三段式电流保护基础上引入电压信息,提出新型三段式电流电压联锁保护;最后,对不满足准入容量的DG,分区域采用新型三段式电流电压联锁保护。以特定10 kV配电网为例,基于PSCAD仿真模型验证了所提策略的有效性。Grid-connected of distributed generation(DG)makes negative impact to traditional current protection of three stage in distribution network.To reduce these effect,a grid-connection strategy for different types of distributed generation is proposed.Firstly,the locating and sizing of DG in distribution network was analyzed under the constraint of protection relay action,a new scheme using fault current limiter in the point of common coupling(PCC)is put forward.Secondly,a new current voltage interlocking protection with three stage is proposed based on the traditional current protection.Finally,a new protection is applied to the area that the relay doesn't meet protection requirement when the capacity of DG exceeds penetration capacity is elaborate,and the effectiveness of the strategy was verified in a 10 kV distribution network through PSCAD.

关 键 词：分布式电源 选址定容 准入容量 故障限流器 新型三段式电流电压联锁保护 

分 类 号：TM715[电气工程—电力系统及自动化]