CAJ | 학술논문

军用移动电站的并网系统在向电网馈电的过程中，当电网电压波动，特别是系统工作于轻载时，会使并网系统输出电流畸变，电流谐波含量增高。在研究传统并网电流控制的基础上，首先提出将重复控制引入电网电压前馈控制计算中，达到抑制电网突变对系统前馈的影响和消除电网周期性扰动产生的电流畸变的目的，提高了系统稳定性；然后采用前馈控制和 PI 控制器串联方式，保证系统的动态性能。实验结果表明，基于重复控制的前馈补偿方法便于实现，该方法能够降低并网电流总谐波，提高系统稳态特性和并网输出电压质量。
군용이동전참적병망계통재향전망궤전적과정중，당전망전압파동，특별시계통공작우경재시，회사병망계통수출전류기변，전류해파함량증고。재연구전통병망전류공제적기출상，수선제출장중복공제인입전망전압전궤공제계산중，체도억제전망돌변대계통전궤적영향화소제전망주기성우동산생적전류기변적목적，제고료계통은정성；연후채용전궤공제화 PI 공제기천련방식，보증계통적동태성능。실험결과표명，기우중복공제적전궤보상방법편우실현，해방법능구강저병망전류총해파，제고계통은태특성화병망수출전압질량。
In the process of feeding the grid by the grid-connected system of military mobile power station,when the grid voltage fluctuates,especially when the system operates at light loads,it will distort the output current of grid-connected system,and increase current harmonics.Based on the study of traditional grid-connected current control,repetitive control is introduced into the grid voltage feedforward control calculations so as to suppress mutations on the grid system of feedfor-ward,eliminate periodic disturbances to generate grid current distortion,and improve the stability of the system.Then by using feedforward control method and the PI controller,we can ensure the system dynamic performance.Experimental results show that the feedforward Control based on repetitive control is easy to implement and improve the stability of the system,reduce total har-monic current grid,and improve the quality of output voltage in grid-connected systems.