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首页> 外文会议>International Conference on Electric Utility Deregulation and Restructuring and Power Technologies >Mechanism analysis on instability caused by multiple HVDC power drop of multiple sending HVDC systems
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Mechanism analysis on instability caused by multiple HVDC power drop of multiple sending HVDC systems

机译：多发直流输电系统多次直流输电引起的不稳定性机理分析

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摘要

As the high-voltage direct current (HVDC)s with large capacity are continually being commissioned, the 'strong DC and weak AC' characteristic of the power gird is furtherly being presented, the influence of the multiple sending HVDC system on the stability of the interconnected power system is becoming significant. In this paper, the HVDC power drop characteristic caused by contingencies of the sending-side system is analyzed, on the base of the three-area AC/DC equivalent model, the impact of the multiple HVDC power drop on the stability of the interconnected system under different power flow directions is analyzed, and the single HVDC blocking is taken to be compared. Finally, the results are verified by the 'North China-Central China-East China' power grid case system. The results show that the instability mode of the sending-side system caused by the multiple HVDC power drop is the first/second angle instability, the severity of the impact of which on the sending-side system stability is close to that of the single HVDC blocking, and further study on the effective counter-measures is quite necessary.
机译：随着大容量高压直流电（HVDC）的不断调试，电力网的“强直流弱AC”特性进一步显现，多发HVDC系统对电网稳定性的影响。互联电源系统变得越来越重要。本文在三区域交直流等效模型的基础上，分析了由发送方系统的突发事件引起的高压直流输电特性，分析了多个高压直流输电对互联系统稳定性的影响。分析了不同潮流方向下的直流输电，并比较了单个高压直流输电闭锁。最后，通过“华北-华中-华东”电网案例系统对结果进行了验证。结果表明，由多个高压直流输电引起的发送侧系统不稳定模式为第一/第二角度不稳定性，其对发送侧系统稳定性影响的严重性接近单个高压直流输电系统的稳定性。封锁，进一步研究有效的对策是十分必要的。

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