Journal of Shanghai Jiao Tong University ›› 2022, Vol. 56 ›› Issue (9): 1139-1147.doi: 10.16183/j.cnki.jsjtu.2021.275

• New Type Power System and the Integrated Energy • Previous Articles     Next Articles

An LC Inverter Based on Novel Dual-Loop Control

LI Shuang, SHI Jianqiang()   

  1. School of Energy and Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China
  • Received:2021-07-31 Online:2022-09-28 Published:2022-10-09
  • Contact: SHI Jianqiang


To improve the voltage tracking and anti-disturbance performance of the LC inverter, a novel voltage-current dual-loop control strategy is proposed. First, the voltage loop is tuned to first-order inertia link by zero-pole cancellation based on virtual resistance, which restrains the overshoot during voltage tracking. Next, the hypo-time-optimal current-loop is adopted to enhance the response speed of the current loop, which suppresses the sudden change of transient voltage. Finally, the cause of overshoot during the voltage recovery period is analyzed and the overshoot is eliminated by the adaptive integrator initial value, which modifies the voltage waveform distortion under loading disturbance. Based on the traditional double-loop control, the voltage loop and the current loop are improved respectively by the proposed novel control strategy, which overcomes the shortcomings of step response and anti-load disturbance performance. The feasibility and effectiveness of this method are validated through simulations on MATLAB/Simulink.

Key words: inverter, dual-loop control, virtual resistance, hypo-time-optimal current-loop, adaptive integrator initial value

CLC Number: