基于支路势能函数失步判据的华中电网失步解列策略

发布时间：2018-01-16 18:34

本文关键词：基于支路势能函数失步判据的华中电网失步解列策略　出处：《高电压技术》2017年07期 　论文类型：期刊论文

【摘要】：现有的失步解列装置缺乏信息共享,失步断面各支路常常不能同时解列,进而导致振荡中心迁移,无法正确解列。为了保证失步解列装置能准确解列失步断面,按照省间调度分区和省内同调分群的思路,提出首先通过离线数字仿真确定系统断面解列方案策略表,然后以支路暂态势能指标作为断面两端系统失步的实时判据,在线查询系统断面解列方案策略表,从而确定系统解列方案,并对华中电网典型解列算例进行了仿真分析。仿真结果表明:支路势能函数作为解列判据能够有效识别系统失步断面,利用所提出的失步解列策略能够有效避免同一断面不同回路就地解列判据动作不一致造成的振荡中心迁移问题,也能保证振荡中心落在省内时解列装置正确动作。研究结果可为电网失步解列提供参考。
[Abstract]:There is a lack of information sharing in the existing deworming devices, and each branch of the out-of-step section is often unable to be de-listed at the same time, which leads to the migration of the oscillation center and the failure to decompose the sequence correctly. In order to ensure that the out-of-step disassembly device can accurately solve the out-of-step section. According to the idea of inter-province dispatching partition and homology cluster, the paper puts forward an off-line digital simulation to determine the strategy table of system cross-section de-listing scheme. Then the transient potential energy index of the branch is used as the real-time criterion of the off-step of the system at both ends of the cross-section, and the strategy table of the system cross-section de-listing scheme is queried online to determine the de-listing scheme of the system. The simulation results show that the branch potential energy function can effectively identify the out-of-step section of the system as the decoupling criterion. The proposed out-of-step strategy can effectively avoid the oscillation center migration caused by the inconsistency of the in-situ decoupling criterion in different loops of the same section. It can also ensure the correct operation of the decoupling device when the oscillation center falls within the province. The results of the study can provide a reference for the out-of-step decoupling of the power network.
【作者单位】：国家电网公司华中分部;中国电力科学研究院;强电磁工程与新技术国家重点实验室(华中科技大学);
【基金】：国网华中分部科技项目(52140014003G)~~
【分类号】：TM712
【正文快照】： 3.强电磁工程与新技术国家重点实验室(华中科技大学),武汉430074)0引言1电网大规模互联有利于资源的分配和系统稳定性的提高,但却给系统的同步运行带来了挑战[1-3]。当电力系统遭受严重干扰时,其同步性可能受到巨大破坏,系统的整体性将无法保持。此时,如何避免电网发生崩溃,保

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