输电网输电能力评价方法的解析与改进

Analysis and Improvement on Evaluation Method of Power Grid Transfer Capacity

随着电网规模的增大和运行复杂程度的提高,基于运行统计的输电网输电能力评价能够真实地反映电网的设备、结构和运行管理水平,因此逐步受到各国重视。在深入剖析输电网可靠性评价指标体系的基础上,提出了考虑回路调度容量的输电能力评价系列指标;同时建立了以变电站为核心的变电能力的评价指标,包括变电站整体健康程度和考虑站内网络特征的变电站容量损失两类指标。进一步提升了现有指标评估实际输电能力的准确度,通过局部电网案例分析表明了所建指标的有效性。

With the expending scale and the increasing operation complexity of power grid,reliability evaluation of transmission grid based on operation statistics can truly reflect the level of facility,structure and operation management of power network,which gradually gains the attention in many countries.After deep research on various countriesreliability evaluation indexes of transmission grid,a series of indexes for evaluating transfer capacity are proposed by considering circuit scheduling capacity.And the evaluation indexes of substation capacity is built,which include such two indexes as whole health degree and the substation capacity loss by considering in-substation network features.In the end,the accuracy of the existing indexes in evaluating the actual transfer capacity is further enhanced.The analysis of a case on the local power grid shows that these indexes are effective.