CAJ | 학술논문

针对级联多电平静止无功补偿器( STATCOM)的直流侧电容电压存在平衡性和稳定性的问题,提出采用可控整流技术对电容电压进行控制. 给出了该系统数学模型的建立过程,研究了控制器的设计方法,并在SIMPLORER软件平台上完成了系统模型的搭建,仿真结果表明,整流器可以有效地补偿各个H桥中的损耗差异,使电容电压保持较好的平衡性和稳定性. 在仿真结果中,还给出了逆变侧在直接电流控制和间接电流控制下不同的控制效果,比较了它们的优缺点. 具有一定的实用性和可行性.
침대급련다전평정지무공보상기( STATCOM)적직류측전용전압존재평형성화은정성적문제,제출채용가공정류기술대전용전압진행공제. 급출료해계통수학모형적건립과정,연구료공제기적설계방법,병재SIMPLORER연건평태상완성료계통모형적탑건,방진결과표명,정류기가이유효지보상각개H교중적손모차이,사전용전압보지교호적평형성화은정성. 재방진결과중,환급출료역변측재직접전류공제화간접전류공제하불동적공제효과,비교료타문적우결점. 구유일정적실용성화가행성.
The voltage of capacitor could be unbalanced and unstable at the DC link in the cascaded multilevel static synchronous compensator ( STATCOM) .A strategy that the rectifiers control the voltage of capacitor is presented.The modeling establishment of the system and the design process of the controllers are listed.Also the model of system is built on the simulation software SIMPLORER platform.The result of the simulation shows that the rectifiers could effi-ciently compensate the power loss difference in the H bridges, which keeps the voltage of capacitors in benign balance and stability.The result also gives the comparison when the different control effect under the direct and the indirect current control, in which the advantages and the disadvantages are discussed.The strategy suggested is practical and feasible.