CAJ | 학술논문

SVC产生的谐波电流较大，通常采用三角形联结的 TCR来抑制进入电网的三次谐波。当三相电压不平衡时，三次谐波电流不能构成零序系统而进入电网。论文提出一种抑制三次谐波电流方法，该方法采用三相晶闸管不对称触发来校正相电流，迫使每相三次谐波电流相等而不能进入电网。仿真结果验证了该方法的可行性。
SVC산생적해파전류교대，통상채용삼각형련결적 TCR래억제진입전망적삼차해파。당삼상전압불평형시，삼차해파전류불능구성령서계통이진입전망。논문제출일충억제삼차해파전류방법，해방법채용삼상정갑관불대칭촉발래교정상전류，박사매상삼차해파전류상등이불능진입전망。방진결과험증료해방법적가행성。
Since a harmonic current generated from SVC is large ,outflow of the tertiary harmonic current toward the system usually is restrained by delta‐connecting the TCR .When the system voltage includes a three‐phase unbalanced compo‐nent ,the tertiary harmonic current can not compose zero sequence system and flows out toward the system .In this paper ,a control method for restraining a tertiary harmonic current is introduced ,which uses the nonsymmetrical firing angle for cor‐recting the current of a reactor for each phase ,so that the quantity of generated tertiary harmonic current of each phase be‐comes equal ,and therefore tertiary harmonic current can be canceled .The simulation results show the proposed method is feasible .