电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2014年
11期
148-154
,共7页
变流器%电网系统%锁相环%对称分量法%广义积分器
變流器%電網繫統%鎖相環%對稱分量法%廣義積分器
변류기%전망계통%쇄상배%대칭분량법%엄의적분기
converter%power system%phase locked loop (PLL)%symmetrical component method%generalized integrator
为准确快速检测出电网电压的幅值、相位和频率，在分析对称分量法及单同步坐标系锁相环基本原理的基础上，提出了广义积分器锁相环的设计方法。这种方法在αβ坐标系下对电网电压进行正、负分序，进而锁定正序电压的相位和频率。并且使用Matlab/Simulink环境分别对单同步坐标系锁相环和基于广义积分器锁相环进行仿真研究，仿真结果表明广义积分器锁相环在电网不平衡时能够准确提取电网信号的幅值、相位和频率，频率自适应性良好且对低次谐波有一定的抑制作用。
為準確快速檢測齣電網電壓的幅值、相位和頻率，在分析對稱分量法及單同步坐標繫鎖相環基本原理的基礎上，提齣瞭廣義積分器鎖相環的設計方法。這種方法在αβ坐標繫下對電網電壓進行正、負分序，進而鎖定正序電壓的相位和頻率。併且使用Matlab/Simulink環境分彆對單同步坐標繫鎖相環和基于廣義積分器鎖相環進行倣真研究，倣真結果錶明廣義積分器鎖相環在電網不平衡時能夠準確提取電網信號的幅值、相位和頻率，頻率自適應性良好且對低次諧波有一定的抑製作用。
위준학쾌속검측출전망전압적폭치、상위화빈솔，재분석대칭분량법급단동보좌표계쇄상배기본원리적기출상，제출료엄의적분기쇄상배적설계방법。저충방법재αβ좌표계하대전망전압진행정、부분서，진이쇄정정서전압적상위화빈솔。병차사용Matlab/Simulink배경분별대단동보좌표계쇄상배화기우엄의적분기쇄상배진행방진연구，방진결과표명엄의적분기쇄상배재전망불평형시능구준학제취전망신호적폭치、상위화빈솔，빈솔자괄응성량호차대저차해파유일정적억제작용。
In order to detect the amplitude, phase and frequency of the grid voltage quickly and accurately, this paper analyzes the method of symmetrical components and principle of single synchronous reference frame phase locked loop. A design method of the generalized integrator phase locked loop is presented, of which the positive and negative components are distinguished in αβcoordinate system, and the phase and frequency of positive sequence voltage are locked. And it takes use of Matlab/Simulink to carry on the research of single synchronous reference frame phase-locked loop and generalized integrator phase locked loop. Simulation results show that the generalized integrator phase locked loop can get amplitude, phase and frequency of the grid voltage accurately when the grid is unbalanced, and the frequency has good adaptiveness and has a certain inhibiting effect on low-order harmonic.
