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.
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Abiri, E., Rahmati, A. & Abrishamifar, A. A sensorless and simple controller for VSC based HVDC systems. J. Zhejiang Univ. Sci. A 10, 1824–1834 (2009). https://doi.org/10.1631/jzus.A0820504
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DOI: https://doi.org/10.1631/jzus.A0820504
Key words
- Voltage source converter high-voltage direct current (VSC-HVDC)
- Space vector modulation (SVM)
- Direct power control (DPC)
- HVDC Light