CAJ | 학술논문

针对目前中高压系统无功和谐波分开补偿的现状,提出一种基于H桥级联的静止无功发生器与LC并联的高压直挂式补偿结构,利用与低成本LC的结合提高了有源容量的利用率和补偿范围。并在此基础上提出了基于数字带通和多同步旋转坐标的无功、谐波和负序检测及控制,实现了无功功率、指定次谐波和负序电流的实时检测和补偿控制;并针对级联静止无功发生器中多个直流侧电压均衡控制的难题,提出了基于相角叠加的控制策略。文中分析了其拓扑结构及补偿原理,并对综合补偿控制和直流均衡控制进行了详细论述。在Simulink中搭建了仿真平台对整个控制策略进行了校核,并进行了模拟实验,结果表明：该控制方式能实现对无功、谐波和负序的综合补偿,直流侧稳定,具有良好的动态性能。
침대목전중고압계통무공화해파분개보상적현상,제출일충기우H교급련적정지무공발생기여LC병련적고압직괘식보상결구,이용여저성본LC적결합제고료유원용량적이용솔화보상범위。병재차기출상제출료기우수자대통화다동보선전좌표적무공、해파화부서검측급공제,실현료무공공솔、지정차해파화부서전류적실시검측화보상공제;병침대급련정지무공발생기중다개직류측전압균형공제적난제,제출료기우상각첩가적공제책략。문중분석료기탁복결구급보상원리,병대종합보상공제화직류균형공제진행료상세논술。재Simulink중탑건료방진평태대정개공제책략진행료교핵,병진행료모의실험,결과표명：해공제방식능실현대무공、해파화부서적종합보상,직류측은정,구유량호적동태성능。
In order to solve the problem that reactive power and harmonic are compensated separately in high and medium voltage grid,a new high voltage suspended compensator constituted by static var generator based on H-bridge cascade and LC in parallel.The utilization and compensative range of active capability are improved by combining a low cost LC.A reactive power,individual harmonic and negative sequence detection method and controlling arithmetic based on digital band pass filter and multiple synchronous rotating coordinates are proposed,thus the real-time detection and compensative control are realized.For the questions of DC voltage balancing control of cascaded SVG,a new control technique of phase angle superposition is described.The topology structure and compensative principle are analyzed and the comprehensive compensative control and DC balancing control are also addressed.The whole control strategy is verified by simulation and experiment,and the results show that this method can achieve compositive compensation effect,DC voltage balancing and stabilization and good dynamic performance.