| 引用本文: | 安天瑜,周苏荃.一种电压薄弱负荷节点群的戴维南等值参数跟踪方法研究[J].电力系统保护与控制,2007,35(24):21-25.[点击复制] |
| AN Tian-yu, ZHOU Su-quan.Research on a weak voltage node group’s Thevenin equivalents tracing method[J].Power System Protection and Control,2007,35(24):21-25[点击复制] |
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| 摘要: |
| 提出了用戴维南等值参数对电压薄弱负荷节点群进行监视的一种方案。静态分析中，采用连续潮流法确定负荷节点电压——负荷参数曲线；在负荷变化率相同情况下，根据电压幅值变化量确定电压薄弱负荷节点；考虑低电压水平与电压崩溃的关系，提出电压幅值变化率作为电压薄弱负荷节点分群所观察信息，考虑地理因素，将电压薄弱负荷节点模糊聚类分群；将每个电压薄弱负荷节点群中典型节点电网侧戴维南等值参数跟踪。提出基于潮流的仿真计算方法进行戴维南等值参数跟踪，观测电压薄弱负荷节点群的电压稳定裕度。该方法在IEEE 118节点系统上验证了其有 |
| 关键词: 电压薄弱负荷节点分群 典型节点 潮流 戴维南等值参数跟踪 |
| DOI：10.7667/j.issn.1674-3415.2007.24.005 |
| 投稿时间：2007-06-06修订日期：2007-07-17 |
| 基金项目:国家自然科学基金（50177006） |
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| Research on a weak voltage node group’s Thevenin equivalents tracing method |
| AN Tian-yu,ZHOU Su-quan |
| (Dept of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China) |
| Abstract: |
| A method is presented to monitor the weak voltage load node groups with Thevenin equivalents. First, continuation power flow solves voltage-load parameter curves of the load nodes. Then weak voltage nodes are selected with voltage magnitude variation under similar load variation rate. With considering about the relation of low voltage level and voltage collapse, voltage magnitude variation rate is chosen as the observation information of weak voltage load nodes grouping. The weak voltage load nodes are fuzzily clustered according to their similarities and simultaneously the geographic factors are taken into consideration. This paper tracks network side Thevenin equivalents on each typical node of weak voltage load node group and analyzes the problems of Thevenin equivalents computing based on local measurements. Therefore, a power flow data based simulation method to track Thevenin equivalents is proposed, which can observe the voltage stability margin of weak voltage load node group. The simulations on IEEE 118 system show the proposed scheme is effective. |
| Key words: weak voltage load node grouping typical node of weak voltage load node group power flow Thevenin equivalents’ tracing |
