Converter connection with a balancing circuit

Details Converter connection with a balancing circuit Converter connection with a balancing circuit

1995-07-18

1997-07-01

Wong, Peter S.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363125, H02M 7155

Patent

active

056444850

ABSTRACT:
A converter connection for conversion between alternating voltage and direct voltage, for connection to a power network (DCN) having a neutral pole (P0) and at least one pole (P+,P-) energized by direct voltage in relation to the neutral pole, comprises a voltage-source converter (VC) with two direct-voltage terminals (DP, DM). At least one of the direct-voltage terminals of the converter is connected by means of an electric pole conductor (W1, W12, W11, W21, W2) to at least one of the poles of the power network which are energized by direct voltage. The converter connection further comprises two valves (V7, V8) mutually series-connected at a common point of connection (J), each of said valves comprising a gate turn-off semiconductor valve (T1) and a diode valve (D1) connected thereto in anti-parallel connection, said series connection being connected between the direct-voltage terminals of the converter, and a reactor (SL) with a first terminal (T1) connected to the connection point and a second terminal (T2) which communicates with the neutral pole in an electrically conducting connection. The converter connection may be accommodated in a converter station (SR1 and SR2, respectively) included in an installation for transmission of high-voltage direct current. (FIG. 2)

REFERENCES:
patent: 4375612 (1983-03-01), Wirth
patent: 4455598 (1984-06-01), Andre
patent: 4757435 (1988-07-01), Wood et al.
patent: 4805082 (1989-02-01), Heinrich et al.
patent: 5267137 (1993-11-01), Goebel
patent: 5355294 (1994-10-01), De Doncker et al.
patent: 5483435 (1996-01-01), Uchino
Impulse-Commutated Controller Rectifiers with no Request of Reactive Power from the Power Supply Network, Alexa et al Etz Archiv vol. 2 Nov. 1980 No. 11, pp. 325-326, 4 Figure.

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