Zero power starting method of thermal generator set with high-voltage direct-current transmission system

Abstract

The invention relates to a zero power starting method of a thermal generator set with a high-voltage direct-current transmission system. The zero power starting method comprises the following steps: (1) forming a flexible direct current transmission system by using part of equipment of a high-voltage direct-current transmission system pole I such as a converter transformer, a smoothing reactor and a direct current transmission line and adding another part of equipment including an insulated gate bipolar translator (IGBT) converter valve, a bridge arm electric reactor and a starting resistor, wherein the flexible direct current transmission system determines the parameters of the added another part of the equipment according to the parameters of the part of the equipment of the high-voltage direct-current transmission system; (2) establishing the flexible direct current transmission system; and (3) conducting zero power starting of the thermal generator set with the high-voltage direct-current transmission system. The zero power starting method of the thermal generator set with the high-voltage direct-current transmission system has the advantages of being low in cost, convenient to assemble and disassemble, and capable of being widely used for solving the problem of zero power starting of the thermal generator set with the high-voltage direct-current transmission system.

Description

technical field [0001] The invention relates to the field of high-voltage direct current transmission, in particular to a zero-power start-up method of a thermal power generating set with a high-voltage direct current transmission system. Background technique [0002] Most of the thermal power bases that have been developed in my country are located near the load centers. The AC power grids in these areas are relatively complete. The generator sets of thermal power bases can be directly connected to the AC power grid, and the high-voltage direct current transmission system sent out can also be directly connected to the AC power grid. But some areas that are urgently needed to be developed do not have a complete AC grid, or even an AC grid. When the thermal power bases in these areas are developed and transmitted to the load center through the high-voltage direct current transmission system, neither the thermal power generation units nor the high-voltage direct current transm...

AI Technical Summary

Problems solved by technology

The flexible DC transmission system is limited by equipment manufacturing and investment. The voltage level does not exceed 320kV, and the transmission capacity does not exceed 1000MW. At present, it does not meet the needs of thermal power bases for large-capacity power transmission. However, flexible DC transmission technology and high-voltage DC transmission technology are used Combined, it can solve the problem of zero-power start-up of thermal power generating units with HVDC transmission system on the basis of increasing a small investment

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