CAJ | 학술논문

针对三相电网不平衡和畸变时传统的三相锁相环锁相精度差等问题,研究了一种基于采样周期变化的锁相环技术（VSP_PLL）,并通过滑动Gortzel滤波器滤除负序和谐波电压造成的扰动,从而消除电压不平衡的影响,很好地完成锁相。在三相电压不平衡、电压畸变、频率突变情况下进行了仿真研究,结果验证了所用锁相环的正确性和有效性。
침대삼상전망불평형화기변시전통적삼상쇄상배쇄상정도차등문제,연구료일충기우채양주기변화적쇄상배기술（VSP_PLL）,병통과활동Gortzel려파기려제부서화해파전압조성적우동,종이소제전압불평형적영향,흔호지완성쇄상。재삼상전압불평형、전압기변、빈솔돌변정황하진행료방진연구,결과험증료소용쇄상배적정학성화유효성。
A PLL method based on variable sampling period was proposed under voltage unbalancing and harmonics. In order to eliminate disturbances caused by the negative sequence voltage and the harmonics, a filter based on the Sliding Gortzel Transform was used in the method. Simulation with frequency steps, unbalances and harmonics was given to verify the method.