一种改进型二阶广义积分器的单相锁相环研究

Research on an Improved Single-Phase Locked Loop of Second-Order Generalized Integrator

为保证煤矿补偿设备的精确稳定补偿,需要准确、快速地跟踪电网电压,所以锁相技术对煤矿补偿设备极为重要。在传统基于二阶广义积分器单相锁相环的基础上,提出了一种采用三阶积分模块,对整个系统进行离散化。该改进的二阶广义积分器配合瞬时无功功率理论的单相锁相环,提高了单相锁相环的整体性能和精度。通过仿真与实验验证了该方法的有效性。

In order to ensure the accurate and stable compensation of coal mine compensation devices, it necessary to accurately and quickly track the grid voltage, so the lock-in technique is extremely important for the mine compensation equipment. On the basis of the traditional second-order generalized integrator on single-phase locked loop, proposes a third-order integral module to discrete the whole system. At the same time, the improved second-order generalized integrator coordinate with instantaneous reactive power theory of single-phase phase-locked loop, which improves the overall performance and accuracy of single-phase phase-locked loop. And verifies the effectiveness of the method through simulation and experiment.