摘要
为了实现新能源系统中各并网运行设备的实时同步,采用了一种不需要进行滤波器设计且计算量小的正弦锁定器技术。本文通过虚拟同步发电机的控制思想模拟同步发电机的运行情况,控制其与电网的功率交换为0,实现对电网输入信号幅值、频率及其相位的同步。仿真分析可知,在输入信号发生阶跃突变时,由于虚拟惯性的存在其输出信号不发生瞬时突变;当输入电压信号中含有幅值为10%基波的2、3、5次谐波成分时,正弦锁定器的输出电压总谐波畸变率从增强型锁相环条件下的4.28%减小到0.01%,有效的验证了正弦锁定器的抗谐波干扰能力。
In order to realize the real-time synchronization of various grid-connected operation equipment in new energy system,this paper adopted a effective sinusoid-locked loop technique which do not need to design the filter and has the advantage of less calculation. This paper mimicked the operation of synchronous generators which is based on the control thinking of virtual synchronous generator,by controlling the power exchanged to be zero with the grid to get the synchronized signal of input amplitude,frequency and phase. Finally through the Matlab / Simulink simulation analysis,the sinusoid-locked loop technology has the characteristic of that output signal without instantaneous mutations because of the existence of virtual inertia when the input signal step mutation; when the input voltage signal with 2nd,3rd,5th order harmonic components which the amplitudes are 10% of the fundamental wave,and the output voltage total harmonic distortion rate decreased from 4. 28% which under the condition of enhanced phase-locked loop to 0.01%. The simulation results are given to effectively verify the capacity of resisting harmonic interference of sinusoidlocked loop technique.
出处
《电测与仪表》
北大核心
2015年第16期17-20,共4页
Electrical Measurement & Instrumentation
基金
西华大学研究生创新基金资助项目(YCJJ2015101)
四川省科技厅应用基础项目(2012JY0120)
四川省高校重点实验室项目(2013TYNZ-02)
攀枝花市科技局项目(2014CY-S-1-2)
攀枝花学院校级项目(2014YB11)
攀枝花市科技计划项目(2015CY-C-5)
四川省电力电子节能技术与装备重点实验室项目(szjj2015-066)
关键词
并网
虚拟同步发电机
正弦锁定器
同步
grid connected
virtual synchronous generator（VSG）
sinusoid-locked loop（SLL）
synchronization
