基于虚拟同步电动机技术的变频器控制策略研究

发布时间：2018-06-19 22:34

本文选题：虚拟同步电机 + 变频器　；参考：《中国电机工程学报》2017年15期

【摘要】：电力系统的一次调频是维护电网稳定运行的有效手段,变频器在日常生产和生活中占有大量比重,为了使其能够对电力系统一次调频过程产生有益的影响,该文提出一种基于虚拟同步电动机(virtual synchronous motor,VSM)技术的变频器控制策略。变频器由整流和逆变两部分主要功能组成:针对整流部分,采用Udc-Q控制策略,控制变频器向电网输出的无功及抑制向电网输出的谐波;针对逆变部分,采用虚拟同步电动机控制策略,分别设计功频控制器和无功/电压控制器,能够随所带负荷的有功和无功变化,使变频器改变输出频率和内部励磁电压,同时能够随系统频率变化调整自身功率输出。在Matlab/Simulink下对该控制策略进行仿真,仿真结果表明,所提控制策略能够使变频器模拟虚拟同步电动机的特性,可有效提高系统电能质量和系统运行稳定性。
[Abstract]:The primary frequency modulation of power system is an effective means to maintain the stable operation of power network. The frequency converter occupies a large proportion in daily production and daily life, in order to enable it to have a beneficial impact on the process of primary frequency modulation of power system. This paper presents a frequency converter control strategy based on virtual synchronous motor VSM technology. The inverter is composed of two main functions: for the rectifier part, the Udc-Q control strategy is used to control the reactive power output from the inverter to the power grid and to suppress the harmonic output to the power grid, and for the inverter part, Using the control strategy of virtual synchronous motor, the power and frequency controller and the reactive power / voltage controller are designed respectively, which can change the output frequency and the internal excitation voltage with the change of the active and reactive power of the load. At the same time, it can adjust its own power output with the system frequency change. The simulation results under Matlab / Simulink show that the proposed control strategy can make the inverter simulate the characteristics of virtual synchronous motor and improve the power quality of the system and the stability of the system.
【作者单位】：国家电网公司;中国电力科学研究院;
【基金】：国家自然科学基金项目(51377148) 国家电网公司科技项目(EPRIPDKJ(2016)1138) 中国电科院创新基金项目(PD83-16-036)~~
【分类号】：TM921.51

【相似文献】