The Method of Adjusting the Working Bus Voltage of Power Plant by 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, in particular, to a method for adjusting the working bus voltage of a power plant through a synchronous motor, so as to solve the problem of The excessive fluctuation range of the bus voltage leads to the decrease of the safety performance of the unit. Background technique [0002] With the development of the economy, the scale of power grid interconnection continues to grow, and the speed of power supply construction is also accelerated. As the power grid has higher and higher requirements for voltage quality, each unit is required to have sufficient reactive power adjustment capabilities. During the operation of the unit, the generator voltage The adjustment is very frequent. In particular, the operating range of the generator voltage is generally 90% to 105% of the rated value, while the operating range of the utility power is generally...

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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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