CAJ | 학술논문

随着电压源变换器型高压直流(Voltage-Sourced Converter-Based High-Voltage Direct Current，VSC-HVDC)输电需求的持续增加，模块化多电平变换器(Modular Multilevel Converter，MMC)成为柔性直流输电的研究热点。环流的抑制和子模块电容电压的平衡是 MMC 控制的研究重点之一。推导了模块化多电平变换器高压直流(Modular Multilevel Converter based HVDC，MMC-HVDC)输电系统的离散数学模型，在此基础上针对五电平MMC的控制目标提出一种改进的具有工程应用价值的模型预测控制策略(Model Predictive Control，MPC)。通过引入误差因子减小了子模块电压波动范围，同时通过MPC与电压排序算法相结合减小了传统MPC的计算量，并实现了HVDC系统传输功率的控制、MMC环流的抑制和MMC子模块中电容电压的平衡。仿真结果验证了所提出的控制策略的有效性。
수착전압원변환기형고압직류(Voltage-Sourced Converter-Based High-Voltage Direct Current，VSC-HVDC)수전수구적지속증가，모괴화다전평변환기(Modular Multilevel Converter，MMC)성위유성직류수전적연구열점。배류적억제화자모괴전용전압적평형시 MMC 공제적연구중점지일。추도료모괴화다전평변환기고압직류(Modular Multilevel Converter based HVDC，MMC-HVDC)수전계통적리산수학모형，재차기출상침대오전평MMC적공제목표제출일충개진적구유공정응용개치적모형예측공제책략(Model Predictive Control，MPC)。통과인입오차인자감소료자모괴전압파동범위，동시통과MPC여전압배서산법상결합감소료전통MPC적계산량，병실현료HVDC계통전수공솔적공제、MMC배류적억제화MMC자모괴중전용전압적평형。방진결과험증료소제출적공제책략적유효성。
With-the-continuously-growing-demand-of-the-voltage-sourced-converter-based-high-voltage-direct-current-(VSC-HVDC)-transmission,-modular-multilevel-converter-(MMC)-achieves-great-attentions-in-VSC-HVDC-system.-Circulating-current-eliminating-and-sub-module-capacitor-voltage-balancing-is-one-of-the-main-technical-challenges-associated-with-the-control-of-MMC.-The-discret-mathematic-model-of-the-modular-multilevel-converter-based-HVDC-(MMC-HVDC)-system-is-derived,-and-an-improved-model-predictive-control-(MPC)-strategy-with-engineering-value-is-proposed-for-five-level-MMC.-The-sub-module-voltage-ripple-is-reduced-by-introducing-the-error-factor.-Furthermore,-the-combination-of-MPC-and-voltage-sequencing-algorithm-reduces-the-computation-burden,-and-realizes-the-transmission-power-control-in-MMC-HVDC-system,-circulating-current-eliminating,-sub-module-capacitor-voltage-balancing.-Simulation-results-validate-the-proposed-control-strategy.