电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2015年
8期
14-20
,共7页
电动汽车%充电功率曲线%配电网保护%无功功率突变量%PSCAD
電動汽車%充電功率麯線%配電網保護%無功功率突變量%PSCAD
전동기차%충전공솔곡선%배전망보호%무공공솔돌변량%PSCAD
electric vehicles%charging power curve%distribution network protection%reactive power fault component%PSCAD
对基于三相不可控整流桥和 DC/DC 高频隔离变换器类型的充电机进行了建模与仿真，分析了充电机作为负载的运行特性。在分析电动汽车用户用车行为的基础上，采用蒙特卡洛方法求出了住宅区1500辆电动汽车充电功率日负荷曲线。针对充电负荷的负载特性及其对配电网继电保护的影响，提出了基于无功功率突变量启动的过电流保护方案，且给出了详细的整定方法及其保护的动作特性。使用 PSCAD 进行了方案仿真分析，仿真结果验证了所提出的含大规模电动汽车的配电网的配电线路保护方案的有效性。
對基于三相不可控整流橋和 DC/DC 高頻隔離變換器類型的充電機進行瞭建模與倣真，分析瞭充電機作為負載的運行特性。在分析電動汽車用戶用車行為的基礎上，採用矇特卡洛方法求齣瞭住宅區1500輛電動汽車充電功率日負荷麯線。針對充電負荷的負載特性及其對配電網繼電保護的影響，提齣瞭基于無功功率突變量啟動的過電流保護方案，且給齣瞭詳細的整定方法及其保護的動作特性。使用 PSCAD 進行瞭方案倣真分析，倣真結果驗證瞭所提齣的含大規模電動汽車的配電網的配電線路保護方案的有效性。
대기우삼상불가공정류교화 DC/DC 고빈격리변환기류형적충전궤진행료건모여방진，분석료충전궤작위부재적운행특성。재분석전동기차용호용차행위적기출상，채용몽특잡락방법구출료주택구1500량전동기차충전공솔일부하곡선。침대충전부하적부재특성급기대배전망계전보호적영향，제출료기우무공공솔돌변량계동적과전류보호방안，차급출료상세적정정방법급기보호적동작특성。사용 PSCAD 진행료방안방진분석，방진결과험증료소제출적함대규모전동기차적배전망적배전선로보호방안적유효성。
The model of the charge pile based on the three phase diode bridge rectifier and the DC/DC high-frequency isolated converter is built and simulated in PSCAD, then the load characteristic of the charge pile is analyzed. Based on the analysis of the way how users use their electric vehicles, the Monte Carlo method is applied to find out the daily load curve of 1 500 electric vehicles' charging power. Considering the charging load's characteristic and its influence on the current protection of the power distribution line, the over current protection based on the reactive power fault component is proposed. The detailed setting method and the operation characteristics of the protection are given. The protection scheme is simulated using PSCAD, and the simulation result verifies the effectiveness of the proposed line protection scheme of the distribution network including large-scale electric vehicles.
