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This paper presents a new HVDC system improved by an inductive filtering method, and afterward proposes a unified equivalent circuit model and a corresponding mathematical model for the calculation of the harmonic transfer characteristics of the new HVDC system. First, according to the special topology of the new HVDC converter station, an equivalent circuit model described by the fundamental and...
The new converter transformer and harmonic suppression scheme Filter Commutated Converter (FCC) has a unique connection mode. It is very hard to establish the coupled circuit mathematical model when the FCC only contains unaccompanied voltage sources or voltage controlled voltage sources (VCVSs), because some of their elements have no branch admittances or the impedances equals to zero. However the...
The auto-compensation and harmonic shielding converter transformer, namely the new converter transformer, adopts the prolonged delta wiring in the secondary winding, and there is a tap between the common winding and the prolonged winding, which is connected with the inductive filters. Compared with the traditional converter transformer, the electrical connection in the new converter transformer is...
In the paper, a novel filter commutated converter (FCC) is proposed, taking its special configuration into account, the reactive power compensation factor at the valve side (compensation factor in short) is defined. It's indeed necessary to research Compensation Factor how to influence on the commutated reactance and the HVDC transmission system's line voltage of the valve side without load, DC voltage,...
Compared with the traditional converter transformer, the new converter transformer has a unique connection. Based on the principle of the transformer coupling circuit and the actual design parameter of the transformer, the three-phase mathematical model, which includes the information about the new converter transformer's wiring feature, the electrical parameters, etc, is presented according to the...
The new converter transformer, that is the auto-compensation and harmonic-shielding converter transformer, adopts the self-coupling wiring for the secondary windings, and there is a tap at the linking point of the coupling windings, which is connected with the inductive filters. Compared with the traditional converter transformer, the electromagnetic transient state of the new converter transformer...
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