用户自备分散电源同时启动对配电网的影响及其措施分析  

Influences and Measures of Simultaneous Starting of Customer DGs in Distribution Network

作　　者：雷金勇[1] 谢俊[1] 甘德强[1] 吴文宣[2] 陈金祥[2] 林国庆[2] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]福建省电力试验研究院,福建省福州市350007

出　　处：《电力系统自动化》2009年第4期82-86,共5页Automation of Electric Power Systems

摘　　要：用户在市场环境下与电网公司的博弈过程中,将倾向于在电网负荷较高时启动用户自备的分散电源(DG)并网。文中首先建立了含异步型分散电源(IDG)的配电网启动模型,根据该模型对杭州局某10kV配电网进行了多IDG的启动模拟,仿真结果表明,多IDG同时启动将造成并网过程中的电压骤降或电流增大,对系统运行和保护配置等都将产生重要影响。随后,提出了采用并联电容器组就地补偿方法和采用自耦减压启动器降压启动的解决方法,并分别进行了算例仿真研究。When bidding with the distribution utilities in an electricity market, distributed generators （DG）, which are controlled by customers, tend to start and connect to the grid when the load demand is high. A starting model of induction distributed generators （IDG） in a distribution network is firstly proposed. Based on the proposed model, the starting transient of several IDGs in a 10 kV system of Hangzhou Power Grid is simulated. The results show that simultaneous starting of IDGs may lead to voltage sags or current increasing suddenly. This demonstrates the adverse impact of IDGs on the operation and control of distribution networks. Subsequently, shunt capacitor banks and autotransformer starters are suggested to mitigate the impact, and simulation results prove that these measures are reasonable and effective. The advantages and disadvantages of these measures are also compared.

关 键 词：分散电源 异步发电机 同时启动 并联电容器 自耦减压启动器 

分 类 号：TM711[电气工程—电力系统及自动化]