CAJ | 학술논문

快速准确地获取同步相位是变流器控制的基本要求。针对传统单相锁相环在动态响应速度与应对谐波污染等方面存在的不足，提出基于旋转坐标变换的单相电力信号同步相位快速开环捕获方法，可同时应对幅值、相位、频率的突变。首先通过三角函数运算推导出一种准确的虚拟正交信号生成的方法，从而提高同步旋转坐标系下锁相方法的精确度。并基于此提出旋转坐标系下快速准确计算实时相位的开环锁相方法，该方法无需相位差闭环自调节过程，从而显著地提高了相位捕获的实时性。最后，通过借用DSC方法成功地解决谐波致锁相不准的问题。各种工况下的实验结果同时表明：提出的方法可在电网环境恶劣的条件下实现快速准确地捕获单相电力信号的同步相位，具有较强的鲁棒性。
쾌속준학지획취동보상위시변류기공제적기본요구。침대전통단상쇄상배재동태향응속도여응대해파오염등방면존재적불족，제출기우선전좌표변환적단상전력신호동보상위쾌속개배포획방법，가동시응대폭치、상위、빈솔적돌변。수선통과삼각함수운산추도출일충준학적허의정교신호생성적방법，종이제고동보선전좌표계하쇄상방법적정학도。병기우차제출선전좌표계하쾌속준학계산실시상위적개배쇄상방법，해방법무수상위차폐배자조절과정，종이현저지제고료상위포획적실시성。최후，통과차용DSC방법성공지해결해파치쇄상불준적문제。각충공황하적실험결과동시표명：제출적방법가재전망배경악렬적조건하실현쾌속준학지포획단상전력신호적동보상위，구유교강적로봉성。
The prompt and accurate phase detection is an essential qualification for the control of power converters. Aiming at the shortcomings of the traditional single-phase PLL such as long response time and inability to operate properly under distorted utility conditions, a novel fast synchronization method is provided based on Park transformation, which is capable of processing utility network signals containing sudden, simultaneous changes of the amplitude, phase and frequency, as well as eliminating phase errors due to harmonics by adopting the Delayed Signal Cancellation (DSC) scheme. An accurate generation method of imaginary orthogonal signals based on mathematical deduction is introduced first, and then the accuracy of phase synchronization is improved in the rotating coordinate system. A real-time open-loop phase synchronization method is further proposed, which requires no self-tuning closed-loop control process and therefore significantly enhances the real-time performance. Finally, the DSC method is utilized to effectively suppress the phase errors due to harmonics. Experiments under different operating conditions validated the proposed phase synchronization method and its fast and accurate qualities, as well as the adaptive performance even in harsh utility environments.