A sensorless and simple controller for VSC based HVDC systems |
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| Authors: | E Abiri A Rahmati A Abrishamifar |
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| Institution: | 1. Department of Electronic and Electrical Engineering, Shiraz University of Technology, Shiraz, 71555-313, Iran
2. Department of Electronic and Electrical Engineering, Iran University of Science and Technology, Narmak, Tehran, 16765-163, Iran
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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. |
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| Keywords: | Voltage source converter high-voltage direct current (VSC-HVDC) Space vector modulation (SVM) Direct power control (DPC) HVDC Light |
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