CAJ | 학술논문

对基于H桥级联的静止同步补偿器（ STATCOM）进行了研究，分析了虚拟磁链观测器的原理和基于虚拟磁链的直接功率控制算法，对虚拟磁链观测器中的纯积分环节进行了改进，应用级联惯性环节代替纯积分环节来消除纯积分环节带来的稳态误差，从功率守恒的角度分析了直流侧电压不平衡的因素，引入了分布式直流侧电压控制算法。在MATLAB仿真软件中对功率解耦控制算法与基于虚拟磁链的直接功率控制算法进行了仿真分析，结果表明基于虚拟磁链的直接功率控制算法有更好的动态性能，且验证了直流侧控制算法的正确性。最后，在一台以VME控制箱为核心控制器的3级链式STATCOM系统上对控制策略进行了验证，实验结果表明了算法的有效性、可行性。
대기우H교급련적정지동보보상기（ STATCOM）진행료연구，분석료허의자련관측기적원리화기우허의자련적직접공솔공제산법，대허의자련관측기중적순적분배절진행료개진，응용급련관성배절대체순적분배절래소제순적분배절대래적은태오차，종공솔수항적각도분석료직류측전압불평형적인소，인입료분포식직류측전압공제산법。재MATLAB방진연건중대공솔해우공제산법여기우허의자련적직접공솔공제산법진행료방진분석，결과표명기우허의자련적직접공솔공제산법유경호적동태성능，차험증료직류측공제산법적정학성。최후，재일태이VME공제상위핵심공제기적3급련식STATCOM계통상대공제책략진행료험증，실험결과표명료산법적유효성、가행성。
The H-bridge cascaded connection based static synchronous compensators ( STATCOM) has been mainly studied in this paper.The principle of virtual flux observer and the direct power control algorithm based on the virtual flux linkage has been analyzed.The integration element in flux observer has been improved and the cascaded inertial element has been adopted instead to eliminate the steady state error.The DC side voltage imbalance factors are ana-lyzed in the view of power conservation, and a distributed DC voltage control algorithm has been introduced.The sim-ulation results show that the direct power control method based on virtual flux linkage has been dynamic property, and the control algorithm in DC side is correct.Finally, the control strategy is verified in a three level chain STATCOM system with VME control box as its core controller, and the experimental results verify the effectiveness and feasibility of the algorithm.