Method for replacing working motors in power plants with synchronous motors

Abstract

The invention provides a method for replacing a station service work drive motor of a power station with a synchronous motor to solve the problems that an asynchronous motor is adopted as the station service work drive motor in the prior art and a station service bus of the power station is overlarge in voltage fluctuating range to cause safety performance reduction of a unit in the operation process of a synchronous generator. According to the method, a relation curve between station service work bus voltage of the generator and stator voltage and the relation curve between the station service work bus voltage of the generator and high-voltage side reactive power of a station service transformer are obtained through a test fitting method; and a maximum capacitive reactive power gap value of a station service system is obtained, so that a parameter of the synchronous motor is determined as the station service work drive motor. A test method of combining a test and curve fitting is provided by the invention. The reactive power gap value of the station service system of the power station is effectively tested; parameter information of the station service work motor is conveniently determined; the station service bus voltage of the unit can be kept within a reasonable range; severe fluctuation of the station service bus voltage is avoided; the energy-saving effect of the unit is improved; and the method has relatively high economical efficiency and practical value.

Description

technical field [0001] The present invention relates to the related technical fields of power plant operation and reactive power control, in particular, it relates to a method for replacing a working motor in a power plant with a synchronous motor, so as to solve the problem of using an asynchronous motor as a working motor in a synchronous During the operation of the generator, the excessive fluctuation range of the factory bus voltage of the power plant 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...

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Problems solved by technology

[0004] In order to solve the problem that the existing asynchronous motor is used as the factory working motor and the synchronous generator is running, the power plant factory bus voltage fluctuation range is too large to cause the safety performance of the unit to decrease, and a power plant factory working motor is provided. Method of replacing with synchronous motor

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