一种考虑 contingency set 下电力网格动态 VAR 响应的实用网格划分方法
A Practical Grid-Partitioning Method Considering the Dynamic VAR Response of Power Grid under Contingency Set
AI总结:
本文提出一种实用网格划分方法,用于提升电力系统短期电压稳定性,通过将大电网分解为子问题,考虑动态 VAR 在 contingency set 下的响应特性。
摘要:
由于负载需求增加,现代电力系统运行状态接近临界水平。此外,现代电力系统集成了大量快速响应动态元件,因此短期电压稳定性(STVS)问题应引起重视。为了提高电力系统的 STVS,可以通过优化 contingency set 中的动态 VAR 预留量。然而,实际电力电网规模通常较大,因此难以直接解决整体优化问题。为降低解决问题的难度,本文提出了一种考虑 contingency set 下电力网格动态 VAR 响应的实用网格划分方法,将整体问题分解为若干子问题。每个区域内的节点在动态 VAR 和故障情况下的电压响应相似。本文基于中国区域电网模型验证了所提方法的有效性。
英文摘要:
Due to the increasing load demand, the operating state of modern power systems are become closing to their critical levels. Moreover, the modern power systems are integrated with a large amount of fast-response dynamic elements, so the short-term voltage stability (STVS) issues should be taken seriously. In order to improve the STVS of power systems, we can optimize the dynamic VAR reserve under contingency set. However, the scale of actual power grids is usually large, so it is hard to solve the overall optimization problem directly. To reduce the difficulty of solving the problem, a practical grid-partitioning method considering the dynamic VAR response of power grid under contingency set is proposed in this paper, to decompose the overall problem into several sub-problems. The buses in each region are similar in terms of voltage response to dynamic VARs and contingencies. The effectiveness of the proposed method is verified based on a region power grid model of China.
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