Three-leg inverter-based distribution static compensator topology for compensating unbalanced and non-linear loads

被引:34
作者
Kumar, Manjathu Valappil Manoj [1 ]
Mishra, Mahesh Kumar [1 ]
机构
[1] Indian Inst Technol, Dept Elect Engn, Madras 600036, Tamil Nadu, India
关键词
invertors; static VAr compensators; network topology; distribution networks; capacitor storage; nonlinear load compensation; unbalanced loads compensation; three-leg voltage source inverter-based distribution static compensator topology; three-leg VSI-based DSTATCOM topology; low-voltage three-phase four-wire distribution system; DC storage capacitor; DC voltage balancing; split capacitor neutral clamped VSI topology; neutral current compensation; ACTIVE POWER FILTER; HYSTERESIS CURRENT CONTROL; 3-PHASE 4-WIRE SYSTEMS; CAPACITOR VOLTAGES; CONTROL STRATEGIES; CONTROL SCHEMES; DSTATCOM; DESIGN; IMPLEMENTATION; EQUALIZATION;
D O I
10.1049/iet-pel.2015.0044
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This study proposes a new three-leg voltage source inverter (VSI)-based distribution static compensator (DSTATCOM) topology to compensate unbalanced and non-linear loads in low-voltage three-phase four-wire distribution systems. The proposed topology uses a three-leg VSI with a single DC storage capacitor. This scheme has an additional small AC capacitor which is connected between negative DC bus to the system neutral. As the proposed topology uses a single DC-link capacitor, the DC voltage balancing issues associated with the popular split capacitor neutral clamped VSI topology is avoided. Moreover, the topology is able to compensate neutral current without using four-leg inverter topology. Analysis and modelling of the proposed topology is explained in detail. Simulation studies are carried out to verify the performance of the proposed scheme and results are presented. The performance of the new topology has been compared with conventional three-leg two level split capacitor VSI-based DSTATCOM topology. Results are also experimentally verified on a laboratory prototype of DSTATCOM.
引用
收藏
页码:2076 / 2084
页数:9
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