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CLC number: TM721
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Received: 2008-07-02
Revision Accepted: 2009-06-01
Crosschecked: 2009-04-27
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A sensorless and simple controller for VSC based HVDC systems
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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.
@article{title="A sensorless and simple controller for VSC based HVDC systems",
author="E. ABIRI, A. RAHMATI, A. ABRISHAMIFAR",
journal="Journal of Zhejiang University Science A",
volume="10",
number="12",
pages="1824-1834",
year="2009",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A0820504"
}
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A1 - 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.
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