Method of adjusting voltage of station service working bus of power plant through synchronous motor

Abstract

The invention aims to solve the problem that the set safety performance is reduced as the voltage fluctuation range of voltage of the station service working bus of a power plant is large in the operation process of the conventional synchronous generator, and provides a method of adjusting voltage of a station service working bus of a power plant through a synchronous motor. The method is characterized in that by a test fitting mode, a relation curve between the voltage of the station service working bus of the power plant and stator voltage and high voltage side reactive power of a station service transformer is obtained, the maximal station service system capacitive reactive power vacancy value is obtained, and the synchronous motor is adopted as a station service working motor, so that adjustment of the voltage of the station service working bus is achieved. The invention provides a testing method which combines testing and curve fitting, the reactive power vacancy value of the power plant is effectively measured, station service working motor parameter information can be conveniently determined, voltage of the set station service bus can be maintained in a reasonable range, violent fluctuation of the voltage of the station service bus is avoided, the set energy saving effect is improved, and the high economic efficiency and the utility value are achieved.

Description

Technical field [0001] The present invention relates to the related technical fields of power plant operation and reactive power control, and in particular to a method for adjusting the voltage of the auxiliary working bus of the power plant through a synchronous motor, so as to solve the problem of Excessive bus voltage fluctuation range causes the safety performance of the unit to decrease. Background technique [0002] With the economic development, the interconnection scale of the power grid continues to grow, and the speed of power supply construction is also accelerating. As the power grid has higher and higher requirements for voltage quality, each unit requires sufficient reactive power regulation capability. The adjustment is very frequent. In particular, the operating range of the generator voltage is generally 90%-105% of the rated value, while the operating range of the auxiliary power supply is generally 95%-105% of the rated value. It is inevitable that the unit wil...

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Problems solved by technology

[0004] The present invention provides a method for adjusting the working bus voltage of a power plant through a synchronous motor in order to solve the problem that the safety performance of the unit is reduced due to the excessive fluctuation range of the bus voltage of the power plant during the operation of the existing synchronous generator

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