一种配电网层间供电能力匹配度评价方法

传统配电网供电能力评价的对象一般是单一电压等级下的配电网,由于配电系统涵盖多电压等级,所以其并不能很全面的评价整个配电系统。为了改善传统方法对整体配电网供电能力裕度评估的局限性,基于配电网具有多电压等级这一前提,提出一种配电网层间供电能力匹配度评价方法与指标,其意义在于评价不同电压等级配电网上级与下级间的匹配程度,能够充分考虑上级配电网对下级配电网的限制情况以及下级配电网对上级配电网的制约情况,进而全方位评定配电网供电能力。并结合供电裕度、负载能力裕度等单一电压等级下的指标,运用线性规划算法建立模型,从而对配电网整体的供电能力有较为直观的判断。最终利用算例分析证明模型可行性,从而完善评估配电网最大供电能力的指标体系。

An evaluation method for matching degree of power supply between layers in distribution network

The traditional distribution network power supply capacity evaluation is generally a single voltage level distribution network. As the distribution system covers multiple voltage levels, it cannot evaluate the entire distribution system comprehensively. In order to improve the limitation of the traditional method on the evaluation of the overall distribution capacity of the distribution network, based on the premise that distribution network has multiple voltage levels, a method and index for evaluating the inter - layer power supply capability of distribution network are proposed. Its significance is to evaluate the matching degree between superior and subordinate of distribution network under different voltage levels, it can take full account of the constraints between superior distribution network to the subordinate distribution network and the subordinate distribution network to the superior distribution network, and then evaluate the power supply capability of distribution network in all directions. According to the index of power supply margin and load capacity margin, the linear programming algorithm is used to establish the model, which can be used to judge the power supply capability of distribution network. Finally, the feasibility of the model is proved by the example analysis, so as to improve the index system to evaluate the maximum power supply capacity of distribution network.