摘要
从降低试验装置成本的角度对相关文献提出的模块化多电平换流器(modular multilevel converter,MMC)换流阀运行试验装置进行改进;根据改进拓扑阐述试验装置电流、电容电压控制原理,并设计电流闭环控制算法和考虑试验装置内部损耗的子模块电容电压闭环控制算法。PSCAD/EMTDC仿真结果表明所提试验电路及控制策略能等效模拟实际运行工况MMC各种电气应力,具有可行性。
To reduce the testing cost, the operational test device for modular multilevel converter （MMC） valves, which is given in relevant literatures, is improved. According to the improved topology of the testing device, the control principle of current and voltage in the improved device is expounded, and the closed-loop control algorithm for the current as well as the closed-loop control algorithm for capacitance voltage in the sub-module, in which the internal loss of the test device is taken into account, are put forward. Results of PSCAD/EMTDC based simulation show that it is feasible for the proposed testing circuit and the control strategy to equivalently simulate actual operational conditions and various electrical stressings in MMC.
出处
《电网技术》
EI
CSCD
北大核心
2014年第9期2611-2616,共6页
Power System Technology
