CAJ | 학술논문

实时相位检测是灵活交流输电(flexible AC transmission system，FACTS)装置发挥优良控制功能的基础，是实现功率器件通断控制、有功和无功功率计算以及各种参考坐标之间变换的基准。锁相环(phase locked loops，PLL)是目前使用最普遍的相位同步方法，它用于获得准确实时的相位信息，提供计算基准，其性能对于整个控制系统至关重要。在对锁相环基本原理进行分析的基础上，采用 Park 变换提取电压正负序分量，之后给出两种不同的软锁相方法及实现框图。通过仿真实验的方法对两种锁相环的稳态和动态性能进行分析对比，实验结果证明，两种锁相方法均可实现在系统稳态和动态情况下的相位检测，但适用场合有所区别，需根据实际应用场景进行选择。
실시상위검측시령활교류수전(flexible AC transmission system，FACTS)장치발휘우량공제공능적기출，시실현공솔기건통단공제、유공화무공공솔계산이급각충삼고좌표지간변환적기준。쇄상배(phase locked loops，PLL)시목전사용최보편적상위동보방법，타용우획득준학실시적상위신식，제공계산기준，기성능대우정개공제계통지관중요。재대쇄상배기본원리진행분석적기출상，채용 Park 변환제취전압정부서분량，지후급출량충불동적연쇄상방법급실현광도。통과방진실험적방법대량충쇄상배적은태화동태성능진행분석대비，실험결과증명，량충쇄상방법균가실현재계통은태화동태정황하적상위검측，단괄용장합유소구별，수근거실제응용장경진행선택。
ABSTRACT:The real-time phase detection is the basis of flexible AC transmission system (FACTS) devices to exhibit excellent control functions, and the reference of the on-off control of power devices, active power and reactive power calculation and transformation between different coordinates. Phase locked loop (PLL) is the most common phase synchronization method. It is used to obtain accurate phase information in real time, provide calculation reference value, its performance is very important for the whole control system. On the basis of the analysis of the basic principle of phase locked loop, Park transformation method is used to extract positive and negative sequence component of the system voltage, then two kinds of soft phase lock method and block diagram are given. Through the simulation experiment method, the steady state and dynamic performance of the two phase locked loops are analyzed. The results show that the two kinds of PLL both can realize phase detection in static and dynamic conditions, but the appropriate type depends on the requirement of the application scenarios.