波动负荷的闪变危害评估  

Evaluating the flicker interference of fluctuating load

作　　者：邵振国[1] 吴丹岳[2,3] 林焱[2] 

机构地区：[1]福州大学电气工程与自动化学院,福建福州350108 [2]福建省电力试验研究院,福建福州350007 [3]国家电网公司电能质量分析实验室,福建福州350007

出　　处：《电力系统保护与控制》2009年第14期36-40,共5页Power System Protection and Control

基　　金：国家自然科学基金资助项目(50747043);福建省科技计划重点项目(2007H0022);福州大学人才基金(XRC-0656)

摘　　要：波动型负荷将引起供电电压的波动和闪变,影响供电系统的电能质量。监测公共连接点电压闪变只能评估多个干扰负荷共同作用的结果,并不能比较不同负荷的危害大小。干扰负荷对供电系统造成的干扰与负荷固有特性相关,单独分析供电电压不可能评估负荷对供电系统的干扰强度,也不能够从多个负荷中鉴别出闪变干扰的来源。从负荷波形数据提取波动的电压和电流幅值,计算波动负荷的阻抗参数,给出了平稳型波动负荷的闪变危害评估方法。Voltage flicker will interfere with the power quality in distribution system resulting from load fluctuation. The flicker intensity detected on PCC is the total effect of all loads putting in PCC, that can＇t help to evaluate the interference of single load. The flicker interference injecting into system is relevant to the operating character of load which puts up as the correlation of voltage and current. So, it can＇t locate the flicker source just according to the voltage analysis. An evaluation method is proposed in this paper, which tracks the load impedance in lower frequency and then computes the flicker intensity of PCC resulting from the only load. Its feasibility is verified with a simulation case.

关 键 词：电能质量 闪变 闪变干扰负荷 危害评估 

分 类 号：TM732[电气工程—电力系统及自动化]