| 引用本文: | 郑飞平,刘宝柱.电压稳定临界参数的异步接替求取策略[J].电力自动化设备,2011,31(3): |
| ZHENG Feiping,LIU Baozhu.Determination of voltage stability critical parameters by asynchronous succession strategy[J].Electric Power Automation Equipment,2011,31(3): |
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| 摘要: |
| 在负荷导纳模型潮流算法基础上，提出了一种基于负荷导纳动态步进的静态电压稳定临界参数的异步接替求取策略。策略1：功率极大值点的快速求取策略，通过跟踪求取逼近过程中的戴维南等值阻抗，并将其对应导纳模值累计于该计算点的负荷导纳值后进行下一次计算，可从初始点快速、不等步地过渡到临界点附近，获得最接近临界点的功率极大值点。策略2：临界参数的准确计算策略，从功率极大值点开始，利用等步长增 ／ 减负荷导纳值的方式获得准确的电压稳定临界参数。策略3：过渡策略，提出的方向判断系数实现了策略1向策略2的有效过渡，使得总体计算效率和计算精度得到了有机协调。多个算例验证了该求取策略的有效性和准确性。 |
| 关键词: 电力系统 电压稳定 功率 - 电压曲线 临界参数 接替策略 |
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| Determination of voltage stability critical parameters by asynchronous succession strategy |
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ZHENG Feiping, LIU Baozhu
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School of Electrical & Electronic Engineering，North China Electric Power University，Beijing 102206，Ｃhina
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| Abstract: |
| Based on the power flow algorithm of load admittance model，an asynchronous succession strategy for determining the critical parameters of static voltage stability by dynamic steps is proposed based on the load admittance. The strategy 1 is for fast determination of maximal power point：by tracing calculation of Thevenin’s equivalent impedance on the process approaching the critical point，which is accumulated to the initial load admittance value for next calculation. Accordingly，the transition from the initial point to the proximity of critical point is very quick with unequal steps and the maximal power point close to critical point is obtained. The strategy 2 is for exact determination of critical parameters：the maximum power point can be used as the beginning to compute the critical parameters of voltage stability by equal steps of load admittance. The strategy 3 is for transition from the strategy 1 to the strategy 2：directional determination factor is created to achieve the valid transition. Several examples show its validity and accuracy. |
| Key words: power system voltage stability power-voltage curve critical parameters succession strategy |
