| 摘要: |
| 为了解决多微网并网给配电网保护带来的问题，提出了一种基于主从式区域纵联保护的故障区段定位矩阵算法。保护主机根据保护从机发送的信息以及当前的网络结构和运行方式生成相应的网络描述矩阵，根据各保护从机采集的故障电流方向信息生成故障信息矩阵，在主机中通过这两个矩阵的加法运算得到故障判断矩阵，由相应的判据实现故障区段定位，并发送命令给保护从机跳开相应的断路器隔离故障。该算法原理简单，运算速度快，存储量小，不仅可以定位开环情况下的单、多重故障，而且可以定位闭环情况下的单、多重故障，不受网络结构变化以及微网投切的影响，具有一定的自适应性。 |
| 关键词: 微网 主动配电网 故障定位 矩阵算法 区域纵联保护 |
| DOI：10.7667/PSPC160476 |
| 投稿时间：2016-04-06修订日期：2016-07-10 |
| 基金项目:国家自然科学基金项目(51307104);上海绿色能源并网工程技术研究中心(13DZ2251900) |
|
| Fault location algorithm for active distribution network with multi micro-grids |
| MA Tengfei,GAO Liang |
| (School of Electric Power Engineering, Shanghai University of Electric Power, Shanghai 200090, China) |
| Abstract: |
| In order to solve the problems that multi micro-grids brings to the protection of distribution network, a fault location matrix algorithm based on master-slave regional pilot protection system is proposed. Firstly, a network matrix which is based on the information of the auxiliary machine sending and the present network structure and the operation mode is formed, and simultaneously, a fault information matrix based on fault current directional information collected by each slave protection is formed; then, a fault judgment matrix is got by the additive operation of the two matrices; finally, we can locate the fault with corresponding criterion and send order to the auxiliary machine to cut breaker isolated fault. This algorithm is simple, fast and small memory space, which can locate single or multi fault of both open-loop distribution network and close-ring distribution network. The algorithm is unaffected when the network structure is changed or the micro-grid is switched, which has a certain self-adaptive. This work is supported by National Natural Science Foundation of China (No. 51307104) and Shanghai Engineering Research Center of Green Energy Grid-connected Technology (No. 13DZ2251900). |
| Key words: micro-grids active distribution network fault location matrix algorithm regional pilot protection |
