基于充电桩选择策略的双馈线负荷优化和削峰潜力分析  

Dual feeder load optimization and peak shaving potential analysis based on charging pile selection strategy

作　　者：李欣 杨景旭 刘艳萍 曾顺奇 黄国华 LI Xin;YANG Jingxu;LIU Yanping;ZENG Shunqi;HUANG Guohua(Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Guangzhou 510620,China;Guangzhou Power Electrical Technology Co.,Ltd.,Guangzhou 510670,China)

机构地区：[1]广东电网公司广州供电局,广东广州510620 [2]广州市奔流电力科技有限公司,广东广州510670

出　　处：《电力自动化设备》2022年第4期34-40,共7页Electric Power Automation Equipment

基　　金：南方电网公司科技项目(GZHKJXM20190063)。

摘　　要：为了改善充电站通过多台变压器接入双馈线场景下配电网运行的经济性和安全性,提出了电动汽车对充电站内接入不同馈线下充电桩的选择策略,以改善馈线负荷均衡度并实现负荷削峰。阐述了充电站接入双馈线的方式和充电桩优化选择的原理,并提出了充电桩选择策略的适用场景和实施条件;从改善馈线负荷均衡度的角度出发,建立了充电桩选择策略的优化目标;提出了接入不同馈线的充电桩容量合理分配方式,设计了充电桩选择策略的优化流程和求解方法,从而利用充电桩选择策略为电网侧需求提供服务。通过算例仿真分析验证了所提充电桩选择策略对改善馈线负荷均衡度的有效性,并评估了该策略的负荷削峰潜力。基于此,建议中大型充电站可采用多台变压器接入2条10 kV馈线,以增大充电负荷的调控潜力。In order to improve the economy and safety of distribution network operation in the scenario where charging stations are connected to dual feeders through multiple transformers,the strategy for EVs(Electric Vehicles) to select charging piles connected to different feeders in a charging station is proposed to improve the load balance degree of feeders and achieve peak load shaving.The connection methods of the charging station to dual feeders and the principle of charging pile optimization selection are described,and the applicable scenarios and implementation conditions of charging pile selection strategy are proposed.The optimization objective of charging pile selection strategy is established from the perspective of improving the load balance degree of feeders.The reasonable distribution method of charging pile capacity connected to different feeders is proposed,and the optimization process and solution method of charging pile selection strategy are designed,so that the charging pile selection strategy can serve the demand of power grid side.The effectiveness of the proposed charging pile selection strategy to improve the load balance degree of feeders is verified by simulation analysis of an example,and the peak load shaving potential of the strategy is evaluated.As a result,it is suggested that medium and large charging stations can use multiple transformers to connect to two 10 kV feeders,so as to increase the regulation potential of charging load.

关 键 词：电动汽车 负荷均衡度 负荷削峰 充电桩选择 双馈线 

分 类 号：U469.72[机械工程—车辆工程] TM732[交通运输工程—载运工具运用工程]