Improved State-Feedback Control for Current Source Converter of SMES
Current source converter (CSC) can control power transfer between superconducting coil and the AC power system, which is the key component of superconducting magnetic energy storage (SMES). This paper presents an improved state-feedback control for CSC of SMES. Adopting the discretization method, the design of decoupled state-feedback control system is simple and straight. To overcome the drawbacks of the discretization method and improve the control system dynamics, the effect of the control time delay is considered. Furthermore, by selecting the current error vector and the output voltage error vector as the additional state variables, a linear state feedback loop is added to the control system to achieve the feature of deadbeat. The steady state performance and dynamic response are investigated. MATLAB simulation is performed to evaluate the performance of the proposed control method.
Nanqi Ren, Lam Kin Che, Bo Jin, Renjie Dong and Haiquan Su
S. P. Zhou et al., "Improved State-Feedback Control for Current Source Converter of SMES", Advanced Materials Research, Vols. 512-515, pp. 1049-1054, 2012