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A static voltage fluctuation compensator for AC electric railway using self‐commutated inverters
Author(s) -
Uzuka Tetsuo,
Hase ShinIchi,
Mochinaga Yoshifumi,
Takeda Masatoshi,
Miyashita Takeshi,
Ueda Tsuyoshi
Publication year - 1996
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391170308
Subject(s) - harmonics , ac power , single phase electric power , transformer , exciter , voltage , engineering , voltage drop , electrical engineering , volt ampere reactive , three phase , static var compensator , electronic circuit , power factor , control theory (sociology) , voltage optimisation , computer science , control (management) , artificial intelligence
In this paper, the authors describe the basic configuration of an RPC (Railway Static Power Conditioner), its compensation principles and successful test results (using a small model of RPC). An ac electric railway is placed under a rapidly changing single‐phase load. To avoid a voltage fluctuation under single‐phase loads, electric power is received from a large source. At a feeding substation, three‐phase electric power is transformed into two kinds of directional single‐phase feeding electric power. The authors have already proposed a static voltage compensator for the ac electric railway, called “RPC.” The RPC links a pair of feeding circuits, using two self‐commutated inverters. At the substation, the RPC accommodates an active power in the directional pair of feeding circuits to balance three‐phase power, and possess a reactive power to regulate a three‐phase voltage fluctuation. At a sectioning post, it can compensate for voltage drop using reactive power. It can also act as an active filter to compensate for harmonics. The authors have made a small model (220 V, 20 kVA) of the RPC, and report on the test results obtained using this small model under various conditions. The results indicate that the RPC can accommodate single phase loads, such as transformers and thyristors, can handle an exciter rush current from a transformer, can compensate for harmonics, and so on.