摘要
提出一种基于滑模鲁棒控制器的有功功率调制方案,并将它应用在基于电压源型换流器的多端直流输电系统中,可以通过快速调节陆上电压源型换流器(voltage source converter,VSC)的传输功率,加强陆上交流系统受到扰动后的稳定性。该控制方式由以下3步实现:1)受到扰动后的陆上交流系统,其内部机组根据振荡形式差异,可划分为两个区域,每个区域的动态特性由系统惯量中心模型来表征;2)以灵敏度系数来描述某个机组的角速度相对陆上某个VSC有功变化的灵敏程度,并提出权重系数来量化每个VSC的调制程度;3)通过基于滑模变结构控制理论的推导,得出附加控制规则。上述方案被应用在PSCAD/EMTDC软件上的一个改进的新英格兰39节点系统中,仿真结果表明,该方法具有很好的控制效果。
This paper proposes a Sliding Mode Robust Control based Active-Power Modulation（SMAPM）, which is used in Voltage Source Converter based Multi-Terminal Direct Current（VSC-MTDC） systems. By regulating power of the onshore converters rapidly, it can improve the onshore ac system stability after disturbances. This method can be accomplished by the following three steps. Firstly, the generators in onshore disturbed ac system can be separated into two areas, considering their different swing modes. In each area, the center of inertia model（COI） is used to represent its dynamic performance. Secondly, sensitivity index is used to describe the sensitivity of generator angular speed to active-power change in VSCs. And the extent of modulation in each VSC can be quantified by a proposed weight coefficient. Thirdly, the sliding mode variable structure control theory is used to derive the extra control law. In PSCAD/EMTDC, a modified New England 39-bus system is used for verification and the results turn out well.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2016年第3期664-673,共10页
Proceedings of the CSEE
基金
国家电网公司总部科技项目资助课题(SGCC-HRP031-2015)~~
关键词
有功功率调制
滑模鲁棒控制器
多端直流输电系统
系统惯量中心
灵敏度系数
active-power modulation
sliding mode robust control
multi-terminal direct current system
center of inertia
sensitivity index
