CAJ | 학술논문

提出了一种电网电压不平衡及谐波畸变时基波电压同步信号的检测方法。通过采用一种新颖的谐振式锁相环技术,快速补偿锁相过程中各类电网故障引起的相位跟踪误差,有效地抑制了电网电压中负序及谐波分量引起的频率波动、相位抖动。该方法不仅适用于理想电网条件,更可在各种电压跌落、三相不平衡和谐波畸变等严重瞬态、稳态电网故障下,实现基波电压同步信号的快速检测和电压中基波正、负序分量与谐波分量的分离和提取。仿真与实验结果表明,所提出方法具有检测精度高、实时性好、适应性强和简单实用的特点,可为各种风力发电机组、太阳能光伏并网装置、可逆调速传动系统和动态无功补偿器等并网电力电子设备的运行控制提供有效和可靠的控制基准。
제출료일충전망전압불평형급해파기변시기파전압동보신호적검측방법。통과채용일충신영적해진식쇄상배기술,쾌속보상쇄상과정중각류전망고장인기적상위근종오차,유효지억제료전망전압중부서급해파분량인기적빈솔파동、상위두동。해방법불부괄용우이상전망조건,경가재각충전압질락、삼상불평형화해파기변등엄중순태、은태전망고장하,실현기파전압동보신호적쾌속검측화전압중기파정、부서분량여해파분량적분리화제취。방진여실험결과표명,소제출방법구유검측정도고、실시성호、괄응성강화간단실용적특점,가위각충풍력발전궤조、태양능광복병망장치、가역조속전동계통화동태무공보상기등병망전력전자설비적운행공제제공유효화가고적공제기준。
A novel synchronizing signal detection scheme for the fundamental voltage during unbalanced and/or distorted grid voltage conditions is proposed.By adopting a new resonant-type phase locked loop（PLL） design,the phase tracking error caused by the grid faults can be quickly compensated,and the frequency variation and phase jitter can be effectively suppressed as well.This method can be used for detecting the frequency,amplitude and phase of the fundamental voltage under ideal grid condition,as well as the grid fault condition,which is related with the voltage dips,unbalance and harmonic distortion at both the steady state and transient state.Besides,the positive and negative components of the fundamental voltage,and the harmonic components can be separated completely and rapidly.Simulation and experimental results prove that the proposed algorithm is of high precision,fast dynamic response and strong practicability.It provides a reliable foundation for the control of grid connected power electronic devices,e.g.,wind turbine generators,grid-connected converters of solar photovoltaic,reversible variable speed drive system and dynamic reactive compensators and so on.