基于运行韧性评价的配电网电压暂降治理评估

随着中国生产制造水平的提升,配电网中敏感负荷日趋增加,电压暂降及短时中断造成的经济损失日趋严重,而当前的可靠性及韧性的评价方法无法评价短时间尺度下配电网持续供电的能力,也难以反映电压暂降的影响程度,因而无法提供量化指标为电压暂降治理作规划参考.文中在挖掘电网以往评估方法内涵的基础上,针对含敏感负荷的配电网,考虑网架结构...

Evaluation of Voltage Sag Management in Distribution Network Based on Operation Resilience Assessment

With the rising manufacturing level in China, the ratio of sensitive load in the distribution network keeps increasing, and massive economic loss caused by voltage sag and short-term interruption has become increasingly serious. However, current assessment methods of reliability and resilience are insufficient to evaluate the continuous power supply capacity of the distribution network in the short-term scale. It is difficult to reflect the impact level of voltage sags, which cannot put forward the quantitative indicators as planning reference for voltage sag management. In this paper, on the basis of mining the connotation of the previous assessment methods for the power grid, aiming at the distribution networks with sensitive loads, an assessment method and workflow of operation resilience are presented considering the factors such as grid structure, load level, economy of control measures. Furthermore, the indicators of operation resilience for the distribution network are defined, which can provide the quantitative reference to the assessment of voltage sag management. After performing assessment through specific examples, the indicators of reliability and operation resilience with different power grid structures, and management measures are analyzed and compared in the distribution network with sensitive loads. The result shows that the indicators of operation resilience can evidently and effectively reflect the technical economy of voltage sag management.