华中科技大学学报（自然科学版）2024，Vol.52Issue(7)：22-28,7.DOI:10.13245/j.hust.240808
基于等效无功弹性的变换器电压支撑能力评估
Evaluation of voltage support capability of transformers based on equivalent reactive power elasticity
摘要
Abstract
A voltage support capability evaluation method based on equivalent reactive power elasticity was proposed to accurately evaluate the voltage support capability of converters under different control modes and their applicability in fast disturbance scenarios,as existing voltage support capability evaluation methods rarely focus on the dynamic control of converters and the rate of voltage change during reactive power disturbances.Firstly,considering the control strategy of the converter,the amplitude motion equations of typical grid-forming and grid-following converters were constructed separately.Then,based on the amplitude motion equation,the equivalent reactive power elasticity JQ associated with voltage change rate was extracted as an evaluation index for voltage support capability.By analyzing the amplitude frequency characteristics of JQ,the voltage support capability and related differences of two types of converters under rapid reactive power disturbance were compared and evaluated.Finally,a simulation model in Matlab/Simulink was built to verify the accuracy of the relevant analysis.关键词
并网变换器/跟网型控制/构网型控制/电压支撑能力/幅值运动方程/等效无功弹性Key words
grid-connected converter/grid-following control/grid-forming control/voltage support capability/amplitude movement equation/equivalent reactive power elasticity分类
信息技术与安全科学引用本文复制引用
郑晨灿,孙海斌,王学斌,邹旭东..基于等效无功弹性的变换器电压支撑能力评估[J].华中科技大学学报（自然科学版）,2024,52(7):22-28,7.基金项目
国家电网公司总部科技项目(5108-202218280A-2-305-XG). （5108-202218280A-2-305-XG）
