分布式电站入网方式对电网同步的影响  

The Influence of the Distributed Power Station Connection Modes on the Power Grid Synchronization

作　　者：王意[1] 邹艳丽[1] 李可[1] 黄李[1] 

机构地区：[1]广西师范大学电子工程学院,广西桂林541004

出　　处：《广西师范大学学报（自然科学版）》2017年第4期24-31,共8页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家自然科学基金(11562003);广西多源信息挖掘与安全重点实验室系统性研究课题(13-A-02-03)

摘　　要：本文研究分布式电站通过接入原电网中负荷节点的方式接入电网。根据负荷节点到原电网中各发电机节点的平均距离情况,提出2种分布式电站入网方式:一种方式是新增分布式电站从离原发电机节点平均距离值最小的负荷开始接入,并按照平均距离值的升序顺序依次接入,简称方式A;另一种方式是新增分布式电站从离原发电机节点平均距离值最大的负荷开始接入,按照平均距离值的降序顺序依次接入,简称方式B。从电网统计特性和同步动力学角度进行比较,发现当分布式电站采用方式B接入电网时,网络节点分布较分散,网络同步能力较好,对离电站较近的负荷节点而言,其上的功率扰动引起的电网失同步波的扩散速度较慢,有利于失同步波的扩散抑制。此研究对分布式电站入网时提高电网可靠性运行提供了参考。In this paper,the distributed power stations are connected to the power grid through the load nodes of the original power grid.According to the average distance of each load node to all generator nodes in the original power grid,two kinds of distributed power plant connection modes are put forward.In the first way,the new joining distributed power plants start from the load node of the minimum average distance to the original generator nodes,and the rest of distributed power plants are connected to load nodes according to the average distance value in ascending order,which is called mode A.In the second way,the new joining distributed power plants start from the load of the maximum average distance from the original generator nodes,and other distributed power plants are connected to load nodes according to the average distance value in descending order,which is called mode B.From the grid statistical characteristics and synchronization dynamics point of view,it is found that the network nodes are more distributed and the synchronizability of the network is better when the distributed power plants are connected to the power grid using mode B.At the same time,the diffusion rate of the grid losssynchronous wave caused by the low power disturbance is slower with mode B when the disturbed node is close to the power stations,which is beneficial to the stable control of the grid.This research has some guiding significance for improving the reliability operation of the power grid when the distributed power stations are connected to the grid.

关 键 词：分布式电站入网方式 最短距离 同步动力学 复杂网络 

分 类 号：TM711[电气工程—电力系统及自动化]