CAJ | 학술논문

以背靠背双脉宽调制（pulsewidthmodulation，PWM）变流器为研究对象，首先建立了其动态数学模型，接着从实现其多种控制功能的角度出发，设计了其构成电压源型变流器（voltagesourceconverter，vsc）的双闭环控制器结构，并基于所建立电压源型变流器的d-q同步旋转坐标数学模型，研究了双闭环控制中用于实现VSC输出电流解耦控制的内环控制策略，以及用于实现VSC直流电压恒定、交流电压跟踪和功率四象限动态调节的多种外环控制策略。最后通过数字仿真，不仅考察了双PWM变流器中2个VSC实现不同外环控制策略的动态协调响应特性，而且仿真结果同时验证了所研究控制策略的可行性。
이배고배쌍맥관조제（pulsewidthmodulation，PWM）변류기위연구대상，수선건립료기동태수학모형，접착종실현기다충공제공능적각도출발，설계료기구성전압원형변류기（voltagesourceconverter，vsc）적쌍폐배공제기결구，병기우소건립전압원형변류기적d-q동보선전좌표수학모형，연구료쌍폐배공제중용우실현VSC수출전류해우공제적내배공제책략，이급용우실현VSC직류전압항정、교류전압근종화공솔사상한동태조절적다충외배공제책략。최후통과수자방진，불부고찰료쌍PWM변류기중2개VSC실현불동외배공제책략적동태협조향응특성，이차방진결과동시험증료소연구공제책략적가행성。
Dual-PWM converter can simultaneously realize multiple control functions, so it has been used increasingly and widely in renewable energy sources and power system. Taking dual-PWM converter as research object, firstly its dynamic mathematical model is built. For the purpose of implementing its multi control functions, a dual closed-loop controller for voltage source converter （VSC） composed of dual-PWM converter is designed and based on the built d-q synchronous rotational coordinate mathematical model of VSC the inner-loop control strategy of the dual closed loop controller to implement decoupled control for output current of VSC as well as the multi outer-loop control strategies to implement constant DC voltage, AC voltage tracking and dynamic power control in four quadrants are researched. By means of digital simulation, not only dynamic cooperative response characteristics of different outer-loop control strategies implemented by the two VSCs in dual-PWM converter are investigated, but also the feasibility of the proposed control strategies is verified by simulation results.