双闭环正交相量锁相法的电网频率跟踪技术

发布时间：2018-11-20 11:18

【摘要】：在分析传统基于旋转坐标变换单相锁相环(single-phase locked loop,SPLL)原理的基础上,针对单相瞬时无功锁相法的正交相量模块,提出一种基于双闭环结构的正交相量的产生方法和瞬时无功锁相技术,对比分析二阶通用积分器构建正交相量的方法和基于双闭环产生正交向量方法的数学特性。通过仿真证明,基于两种不同正交向量产生方法的锁相锁频技术,基于双闭环结构的正交相量的瞬时无功锁频锁相技术能较好地解决电网电压幅值变化、电网电压相位变化、电网电压频率变化、电网电压含有谐波时对锁相的影响,该新型锁相法能够很好的跟踪电网频率,保证逆变器的稳定性。
[Abstract]:Based on the analysis of the principle of traditional single-phase phase-locked loop (single-phase locked loop,SPLL) based on rotating coordinate transformation, the direct phasor module of single-phase instantaneous reactive power locked method is proposed. In this paper, a method of generating positive phase variables based on double closed loop structure and instantaneous reactive power phase locking technique are proposed. The mathematical characteristics of the second order universal integrator to construct the orthogonal vector method and the orthogonal vector method based on double closed loop generation are compared and analyzed. The simulation results show that the phase-locked frequency locking technology based on two different orthogonal vector generation methods and the instantaneous reactive power frequency locked phase-locked technology based on the orthogonal phase locked with double closed loop structure can better solve the voltage amplitude change and the voltage phase change of the power network. The new phase-locked method can track the frequency of the power grid well and ensure the stability of the inverter because of the change of the voltage frequency and the influence of the harmonic wave on the power grid voltage.
【作者单位】：浙江工业职业技术学院;华北科技学院;西北工业大学航空学院;绍兴烽光电子科技有限公司;
【基金】：2016浙江省公益技术项目(2016C31055) 华北科技学院河北省矿井灾害防治重点实验室开放研究基金(KJZH2014K07)
【分类号】：TM464

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