| 基于虚拟节点的复杂电网电压跌落随机评估方法 |
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| 引用本文： | 王东旭,乐健,刘开培,仰彩霞,沈广. 基于虚拟节点的复杂电网电压跌落随机评估方法[J]. 电工技术学报, 2011, 0(8): 190-197 |
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| 作者姓名： | 王东旭 乐健 刘开培 仰彩霞 沈广 |
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| 作者单位： | 武汉大学电气工程学院;杭州电力局; |
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| 基金项目： | 国家自然科学基金资助项目(50677048) |
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| 摘 要： | 随着电力系统中敏感设备的大量应用,电力用户对供电质量要求不断提高,电压跌落的评估成为现代电能质量研究中的一项重要内容。本文提出了一种在故障点增加虚拟节点的电压跌落随机预估方法。该方法通过求解复杂电网中任意地点发生对称或不对称故障时各节点的电压跌落幅值,计算出不同故障类型下的电压凹陷域。根据待考察的电压跌落幅值范围,推出对应的故障区间,并结合故障分布概率给出各节点年电压跌落频次的评估结果。在标准IEEE-30节点系统中验证了本文电压跌落评估方法的有效性。
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| 关 键 词： | 复杂电网 电压跌落 电能质量 随机预估 对称和不对称故障 凹陷域 |
Stochastic Assessment Method of Voltage Dip in Complex Power Grid Based on Virtual Bus |
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| Wang Dongxu Le Jian Liu Kaipei Yang Caixia Shen Guang. Stochastic Assessment Method of Voltage Dip in Complex Power Grid Based on Virtual Bus[J]. Transactions of China Electrotechnical Society, 2011, 0(8): 190-197 |
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| Authors: | Wang Dongxu Le Jian Liu Kaipei Yang Caixia Shen Guang |
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| Affiliation: | Wang Dongxu1 Le Jian1 Liu Kaipei1 Yang Caixia1 Shen Guang2(1.Wuhan University Wuhan 430072 China 2.Hangzhou Electric Power Company Hangzhou 310009 China) |
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| Abstract: | With the wide application of sensitive equipment in power system,the requirement of power customers for better power quality is rising.The voltage dip assessment is becoming an important content of power quality study.In this paper,a stochastic assessment method of voltage dip with adding a virtual bus in the fault position is proposed.The remaining voltage expression of each bus is derived after a balanced or unbalanced fault taking place in any position of the complex power grid.The areas of vulnerability... |
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| Keywords: | Complex power grid voltage dips power quality stochastic assessment balanced and unbalanced fault area of vulnerability |
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