一种基于相对熵组合赋权法的区间联络线选取方法研究
电网分区后合理确定区间联络线的选取对于抑制短路电流、合理化电网结构、避免连锁故障的发生具有重要意义。为此,研究了一种基于相对熵组合赋权法的区间联络线选取评估方法。该评估方法选取短路电流、潮流分布、潮流转移、电压稳定和节点短路容量作为综合评价的指标,并且采用整体短路电流水平、潮流熵、潮流转移熵、系统的最大负荷裕度和系统短路容量裕度来定量描述上述评价指标。为避免单一赋权法的局限性,采用相对熵组合赋权法确定各评价指标的综合权重,得到区间联络线选取方案的综合评估值,进而确定最优方案。最后利用PSD电力系统分析软件进行仿真,仿真算例验证了该方法的有效性和可行性。...
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| Published in | 电力系统保护与控制 Vol. 46; no. 2; pp. 65 - 72 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
国网辽宁省电力有限公司大连供电公司,辽宁 大连,116011
16.01.2018
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| Subjects | |
| Online Access | Get full text |
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| Summary: | 电网分区后合理确定区间联络线的选取对于抑制短路电流、合理化电网结构、避免连锁故障的发生具有重要意义。为此,研究了一种基于相对熵组合赋权法的区间联络线选取评估方法。该评估方法选取短路电流、潮流分布、潮流转移、电压稳定和节点短路容量作为综合评价的指标,并且采用整体短路电流水平、潮流熵、潮流转移熵、系统的最大负荷裕度和系统短路容量裕度来定量描述上述评价指标。为避免单一赋权法的局限性,采用相对熵组合赋权法确定各评价指标的综合权重,得到区间联络线选取方案的综合评估值,进而确定最优方案。最后利用PSD电力系统分析软件进行仿真,仿真算例验证了该方法的有效性和可行性。 |
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| Bibliography: | The reasonable selection of interval tie line after network partition is of great significance to reducing the short circuit current, adjusting the power grid structure and avoiding the occurrence of cascading failures. Therefore, an evaluation method for the selection of interval tie line based on combinatorial weighting method of relative entropy is studied. The short circuit current, the power flow distribution, the flow transferring, the voltage stability, the node short circuit capacity are selected as the comprehensive evaluation indexes. And the overall short-circuit current level, the trend of entropy, the entropy of power flow transfer, the maximal load margin, the short circuit capacity margin are used to describe the above evaluation index quantitatively. To avoid the limitation of the single weighting method, combinatorial weighting method of relative entropy is used to determine weight for each evaluation index. Comprehensive assessment values of the selection of interval tie line schemes are obt |
| ISSN: | 1674-3415 |
| DOI: | 10.7667/PSPC170031 |