Universiti Teknologi Malaysia Institutional Repository

Multilevel D-STATCOM for sag and swell mitigation using modulation index control

Majed, A. and Salam, Z. (2016) Multilevel D-STATCOM for sag and swell mitigation using modulation index control. In: 2nd IEEE Conference on Energy Conversion, CENCON 2015, 19 - 20 Okt 2015, Johor Bahru, Malaysia.

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Abstract

The D-STATCOM has been utilized to regulate the voltage to its nominal value by exchanging reactive power with the distribution network. For an effective compensation of the sag and swell, two control approaches, namely the phase angle and modulation index schemes have been utilized. For the former, rapid adjustment in the injected or absorbed reactive power cannot be achieved. Thus, this paper proposes a D-STATCOM using a 15-level cascaded inverter based on the modulation index approach. The advantage of this scheme is rapid adjustment of the reactive power, which in turn results in a rapid regulation of the bus voltage. It allows a direct connection to the medium voltage grid (11 kV) without using bulky transformers while maintaining very low total harmonics distortion without using any filter. The performance of the system with its controller is tested using Simulink-MATLAB. The results indicate very good performance in mitigating the voltage sag and swell; the controller is able to recover very rapidly (less than 1 cycle) with THD less than 6% for the whole range of operation.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Distribution Static Synchronous Compensator (D-STATCOM), Modulation index (MI), Power Quality (PQ), Total Harmonic Distortion (THD)
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:73401
Deposited By: Mohd Zulaihi Zainudin
Deposited On:21 Nov 2017 08:17
Last Modified:21 Nov 2017 08:17

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