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Journal of Zhejiang University SCIENCE A 2009 Vol.10 No.12 P.1824~1834

10.1631/jzus.A0820504


A sensorless and simple controller for VSC based HVDC systems


Author(s):  E. ABIRI, A. RAHMATI, A. ABRISHAMIFAR

Affiliation(s):  Department of Electronic and Electrical Engineering, Shiraz University of Technology, Shiraz 71555-313, Iran; more

Corresponding email(s):   abiri@sutech.ac.ir

Key Words:  Voltage source converter high-voltage direct current (VSC-HVDC), Space vector modulation (SVM), Direct power control (DPC), HVDC Light


E. ABIRI, A. RAHMATI, A. ABRISHAMIFAR. A sensorless and simple controller for VSC based HVDC systems[J]. Journal of Zhejiang University Science A, 2009, 10(12): 1824~1834.

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author="E. ABIRI, A. RAHMATI, A. ABRISHAMIFAR",
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Abstract: 
voltage source converter high-voltage direct current (VSC-HVDC) is a new power transmission technology preferable in small or medium power transmission. In this paper we discuss a new control system based on space vector modulation (SVM) without any voltage line sensors. Using direct power control (DPC) SVM and a new double synchronous reference frame phase-locked loop (DSRF-PLL) approach, the control system is resistant to the majority of line voltage disturbances. Also, the system response has accelerated by using a feed forward power decoupled loop. The operation of this control strategy was verified in a SIMULINK/MATLAB simulation environment. To validate this control system, a 5 kV·A prototype system was constructed. Compared to the original controllers, the current total harmonic distortion (THD), the active and reactive deviations and the DC voltage overshoot were lowered by 2.5%, 6.2% and 8%, respectively. The rectifier power factor in the worst condition was 0.93 and the DC voltage settling time was 0.2 s.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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