CAJ | 학술논문

介绍了单相级联型静止无功发生器(static var generator， SVG)的原理与控制系统结构，采用光纤隔离检测技术进行级联单元直流侧电压的测量。考虑光纤隔离检测延时，建立了基于瞬时能量平衡的直流侧电压外环控制数学模型，得到了基于比例积分(proportional integral，PI)控制的传递函数，并进行了电压外环稳定性分析；建立了基于比例(proportional， P)控制的电流内环离散控制模型，分析得到其在离散域内稳定控制的充要条件。样机实验结果验证了所提稳定性分析方法的正确性。
개소료단상급련형정지무공발생기(static var generator， SVG)적원리여공제계통결구，채용광섬격리검측기술진행급련단원직류측전압적측량。고필광섬격리검측연시，건립료기우순시능량평형적직류측전압외배공제수학모형，득도료기우비례적분(proportional integral，PI)공제적전체함수，병진행료전압외배은정성분석；건립료기우비례(proportional， P)공제적전류내배리산공제모형，분석득도기재리산역내은정공제적충요조건。양궤실험결과험증료소제은정성분석방법적정학성。
The principle of single-phase cascaded static var generator (SVG) and the structure of its control system are presented, and the optical fiber isolation test technology is utilized to measure the voltages at DC sides of cascaded units. Considering the time-delay of optical fiber isolation, an instantaneous energy balance based mathematical model of outer-loop control for voltage at DC side is established, and the stability of voltage outer-loop is analyzed; a proportional control based discrete control model of current inner-loop is established and through analysis the necessary and sufficient condition for its stable control within the discrete domain is obtained. Test results of a 13-level cascaded prototype show that the proposed stability analysis method is correct.