CAJ | 학술논문

针对10 kV配电系统,动态电压恢复器（DVR）采用无串联变压器、模块级联、从网侧通过可控整流取能的拓扑结构。文章在简单分析了单相电压型PWM整流器双闭环控制原理及特点的基础上,提出了一种直流电压单闭环控制策略。该策略有利于降低直流电压、减小开关器件电压应力、减少直流电容串联的数量,在体积、成本大为减小和降低的同时,其控制性能有所提高。利用PSCAD/EMTDC软件对所提出的控制策略结合DVR的补偿控制进行了仿真,仿真结果验证了该控制策略的有效性及可行性。
침대10 kV배전계통,동태전압회복기（DVR）채용무천련변압기、모괴급련、종망측통과가공정류취능적탁복결구。문장재간단분석료단상전압형PWM정류기쌍폐배공제원리급특점적기출상,제출료일충직류전압단폐배공제책략。해책략유리우강저직류전압、감소개관기건전압응력、감소직류전용천련적수량,재체적、성본대위감소화강저적동시,기공제성능유소제고。이용PSCAD/EMTDC연건대소제출적공제책략결합DVR적보상공제진행료방진,방진결과험증료해공제책략적유효성급가행성。
A dynamic voltage restorer（DVR） used in 10 kV distribution network is constructed with no series injection transformer,cascaded cells and a single-phase PWM rectifier connected to the power side.In addition to the principle and characteristics of double closedloop control for single-phase voltage PWM rectifier,a DC voltage single closed-loop control strategy is proposed.It can help to reduce DC voltage level,voltage stress of switch devices and the series amount of DC capacitance.Therefore,the control performance is proved based on the decreased volume and lowered cost.The proposed control strategy and with the DVR compensative control methods are simulated through PSCAD/EMTDC software.Simulation results verify the effectiveness and feasibility of this strategy.