CAJ | 학술논문

作为一种关键的控制技术.数字锁相被广泛应用于逆变器并网以及与其他逆变电源并联运行的场合.基于传统正过零检测数字锁相环的上作原理,针对锁相环路中压控振荡器的频率控制精度问题,采用直接数字频率合成器(DDS)的方法对数字锁相环进行设计.详细分析了数字锁相环的模型,采用XCl64CM单片机设计了数字锁相控制系统,并在一台额定输出功率为500W的并网型光伏逆变装置上进行了实验.仿真和实验结果验证了理论的正确性.
작위일충관건적공제기술.수자쇄상피엄범응용우역변기병망이급여기타역변전원병련운행적장합.기우전통정과령검측수자쇄상배적상작원리,침대쇄상배로중압공진탕기적빈솔공제정도문제,채용직접수자빈솔합성기(DDS)적방법대수자쇄상배진행설계.상세분석료수자쇄상배적모형,채용XCl64CM단편궤설계료수자쇄상공제계통,병재일태액정수출공솔위500W적병망형광복역변장치상진행료실험.방진화실험결과험증료이론적정학성.
Digital phase locked loop(DPLL)is widely used as a crucial control technology in inverters'application in many situations such as gird-connected inverter and parallel inverter system.Based on the working principle of the traditional ze-ru-crossing detection DPLL,in order to control the output frequency of the voltage-controlled oscillator in DPLL precisely,this paper uSes the method of direct digital synthesizers(DDS)for the design of DPLL.The model of DPLL is analyzed,and the DPLL control system which bases on the XCl64CM is designed for a 500 W grid-connected photovoltaic inverter.The simulation and experimental results verify the proposed theory.