Method and device for configuring phase modulator of high-capacity VSC converter station

Abstract

The invention discloses a method and a device for configuring a phase modulator of a high-capacity VSC converter station. The method comprises the following steps of: collecting a response curve of active power of a VSC-HVDC system about time in each expected fault, and a response curve of the active power of the VSC-HVDC about the time in each expected fault when phase modulators with different quantities are configured; calculating the effect indexes of the configured phase modulators for improvement of the VSC-HVDC system alternating current fault ride-through capacity according to the response curves; calculating the effect-cost comprehensive evaluation indexes of the configured phase modulators for improvement of the VSC-HVDC system alternating current fault ride-through capacity according to the effect indexes; and selecting the optimal configuration quantity of the phase modulator according to the effect-cost comprehensive evaluation indexes. The method and a device for configuring a phase modulator of a high-capacity VSC converter station achieves the unification of the safety and the economy of the phase modulator configuration and provides a technical idea for the near-zone dynamic reactive compensation configuration of the high-capacity converter station.

Description

technical field [0001] The invention relates to a method and a device for configuring a condenser in a large-capacity VSC converter station, and belongs to the technical field of electric power automation. Background technique [0002] With the rapid development of UHV AC and DC power grids, major changes have taken place in the form and operating characteristics of the power system, and the contradiction of "strong direct and weak AC" in the transition period of the power grid has become more prominent. With the large-scale replacement of conventional power supplies by power electronic equipment such as DC and new energy, problems such as DC commutation failure and new energy off-grid caused by insufficient dynamic reactive power support have become one of the main problems facing the power grid. [0003] Flexible direct current transmission (VSC-HVDC) based on fully controlled devices has the advantages of no commutation failure, decoupling control of active and reactive p...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of insufficient dynamic reactive power support of the power grid after the large-capacity VSC-HVDC system is put into operation. The effect of HVDC AC fault ride-through capability and economic cost, comprehensively determine the configuration quantity of condensers, in order to achieve the unity of safety and economy

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