Title :
A single phase inverter-zigzag transformer hybrid filter to suppress neutral harmonic currents in three-phase four-wire systems
Author :
Choi, Sewan ; Jang, Minsoo
Author_Institution :
Dept. of Control & Instrum. Eng., Seoul Nat. Univ. of Technol., South Korea
Abstract :
This paper proposes a new hybrid filter to suppress neutral harmonic currents in three-phase four-wire systems. The compensation characteristics illustrate that the proposed scheme works well not only with harmonic voltage-source loads but also with harmonic current-source loads. Under unbalanced loading, the proposed filter eliminates only harmonics in the neutral current while it does not affect the fundamental. The VA rating of the inverter is significantly reduced compared to the conventional one. The experimental results on a prototype validate the proposed control approach.
Keywords :
distribution networks; invertors; power harmonic filters; power system harmonics; transformers; harmonic current-source loads; harmonic voltage-source loads; inverter; neutral harmonic currents; single phase inverter-zigzag transformer hybrid filter; three-phase four-wire systems; unbalanced loading; Conductors; Control systems; Electronic mail; Impedance; Instruments; Low voltage; Manufacturing; Power harmonic filters; Prototypes; Pulse width modulation inverters;
Conference_Titel :
Power Electronics Specialists Conference, 2004. PESC 04. 2004 IEEE 35th Annual
Print_ISBN :
0-7803-8399-0
DOI :
10.1109/PESC.2004.1354814