中国电机工程学报2017，Vol.37Issue(12)：3372-3382,11.DOI:10.13334/j.0258-8013.pcsee.161976
直流电网建模分析与阻尼控制研究
Modeling, Analysis and Damping Control of DC Grid
摘要
Abstract
Modeling of the DC grid is the prerequisite for analyzing the resonant characters and stability issues.It is significant to improve the operating characteristics of DC grid by designing a well-performed damping controller.Firstly,a Thévenin's model of the converter was derived from the averaged converter model using power-balancing principle.Secondly,the small signal model (SSM) of DC grid was established considering the network frame,and then the resonant characteristics were studied.Thirdly,a power damping control strategy was proposed by feeding back the DC current outputted from the converter.The realization form of damping controller was analyzed and its parameters were designed.Finally,electromagnetic and RT-LAB real-time simulation models were constructed.Both results validate that the proposed damping control strategy can suppress the resonant current in DC grid and improve the operating stability of the system.关键词
直流电网/稳定性/阻尼控制/振荡抑制/戴维南模型Key words
DC grid/stability/damping control/oscillation suppression/Thévenin's equivalent model分类
信息技术与安全科学引用本文复制引用
李云丰,汤广福,吴亚楠,杨杰..直流电网建模分析与阻尼控制研究[J].中国电机工程学报,2017,37(12):3372-3382,11.基金项目
国家电网公司科技项目(SGRIZLKJ[2015]457).Science and technology project supported by the state grid corporation of China (SGRIZLKJ[2015]457). （SGRIZLKJ[2015]457）
