基于相位角的失步解列判据在复杂场景下的适应性及对策

发布时间：2018-05-05 09:02

本文选题：失步振荡 + 解列判据　；参考：《电力系统自动化》2015年16期

【摘要】：明确基于就地信息解列判据在大电网适应性,以及对指导复杂大电网运行与控制具有重大意义。分析了失步振荡中心两侧等值电势电压幅值不等、解列装置安装位置和多频振荡对失步过程中相位角变化规律的影响,研究了基于相位角解列判据在复杂场景下的适用条件,提出了适用于大电网的配置原则和应对策略。以失步振荡中心为分界点,配置在等值电势电压较高侧的解列装置存在不能正确识别系统失步的风险,现有工程判据适用于等值电势比小于1.4的场景,配置在等值电势电压较低侧的解列装置存在误判失步周期问题。针对潜在风险,提出统一失步振荡中心方向判断逻辑,在备选解列断面双侧配置解列装置和闭锁反方向失步判断逻辑等应对策略。以多频失步振荡场景,验证了改进策略的正确性。
[Abstract]:It is of great significance to make clear the adaptability of the criterion based on the local information de-listing in large power networks and to guide the operation and control of complex large power grids. The effects of the amplitude of equivalent potential voltage on the two sides of the out-of-step oscillation center, the installation position of the demultiplexing device and the multi-frequency oscillation on the variation of the phase angle during the out-of-step process are analyzed, and the applicable conditions based on the criterion of the de-listing of the phase angle in the complex scene are studied. The configuration principles and countermeasures for large power grids are put forward. Taking the center of out-of-step oscillation as the boundary point, there is a risk that the degaussing device disposed at the higher side of equivalent potential voltage may not correctly identify the out-of-step of the system. The existing engineering criteria are suitable for scenarios where the equivalent potential ratio is less than 1.4. In the lower side of equivalent potential voltage, there is a problem of misjudging the out-of-step period. In view of the potential risks, the unified central direction judgment logic of out-of-step oscillation is put forward, the de-listing device is arranged on both sides of the alternate de-listing section, and the counter-directional out-of-step judgment logic of the locking is put forward. The correctness of the improved strategy is verified by the multi-frequency out-of-step oscillation scene.
【作者单位】：国电南瑞科技股份有限公司;
【基金】：国家电网公司大电网重大专项资助项目(SGCC-MPLG003-2012)~~
【分类号】：TM712

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