Optimization of Backup Power Automatic Switching Strategy in the Distribution Network with Distributed Photovoltaics

Haiyang Liu, Xiaobo Ling, Yifan Zhu, Qiyu Tu, Piao Gao, Chenxu Chao, Yaxin Xie, Xiaodong Zheng, N. Tai
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Abstract

Large-scale distributed photovoltaics (DPs) are connected to the distribution network. when a fault happens in the distribution network, the bus voltage at the fault location cannot immediately decrease to zero due to the existence of DPs, which invalidates the criteria of non-voltage detection and synchronism check and impedes the automatic switching of backup power. Therefore, considering the influence of DPs, this paper puts forward a configuration optimization scheme of backup power automatic switching (BPAS) strategy, which allows the BPAS devices in the distribution network with DPs to conduct non-voltage detection and synchronism check. The example analysis shows that the optimized BPAS strategy can effectively improve the load transfer capacity and reduce the cost of BPAS devices.
分布式光伏配电网备用电源自动交换策略优化
大规模分布式光伏(DPs)接入配电网。当配电网发生故障时,由于DPs的存在,故障点母线电压不能立即降至零,使无电压检测和同步检查的标准失效,阻碍了备用电源的自动切换。因此,考虑到后备电源自动开关的影响,本文提出了一种后备电源自动开关(BPAS)策略的配置优化方案,使配电网中有后备电源自动开关的BPAS设备能够进行无电压检测和同步检查。算例分析表明,优化后的BPAS策略能有效提高BPAS设备的负载转移能力,降低设备成本。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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