Pi-type homologous nuclear phase system and method for gas power plant

Abstract

The invention discloses a pi-type homologous nuclear phase system and method for a gas power plant. An excitation unit of a gas turbine generator is connected with a rotor of the gas turbine generator; the output end of the gas turbine generator is connected with the low-voltage side of a gas turbine main transformer through an outlet enclosed bus of the gas turbine generator and one synchronization point unit of the gas turbine generator sequentially; the high-voltage side of the gas turbine main transformer is connected with a high-voltage bus through two synchronization point units of the gas turbine generator; the high-voltage side of a steam turbine main transformer is connected with the high-voltage bus through a synchronization point unit of the steam turbine generator; and the low-pressure side of a steam turbine main transformer is connected with the output end of the steam turbine generator through an outlet enclosed bus of the steam turbine generator. According to the systemand the method, homologous nuclear phases of the plurality of synchronization points can be completed once; it is not required to change a running mode and operate a knife switch frequently; dangerous sources are relatively few; experiment time and fuel are saved; the experiment efficiency is relatively high; and asynchronous accidents caused by wiring errors can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of power debugging and power testing, and relates to a π-type homologous nuclear phase system and method for a gas-fired power plant. Background technique [0002] As a high-efficiency and environmentally friendly power generation device, gas-fired units are widely used all over the world. The gas usually adopts the gas-steam combined cycle mode, that is, the high-temperature flue gas after the combustion of natural gas and air enters the gas turbine to expand and do work to drive the gas generator to generate electricity. After doing work, the flue gas enters the waste heat boiler through the flue, and the high-temperature flue gas heats the boiler feed water to produce superheated steam to drive the turbine generator to do work. Gas-fired power plants mostly use "one-to-one" (one gas turbine with one waste heat boiler to drive one turbo-generator), and gas-fired power plants have many synchronous points a...

AI Technical Summary

Problems solved by technology

In the existing homologous nuclear phase experiment, the method of generator with bus step-up or transformer reverse transmission is usually used, and each synchronous point is respectively subjected to a homologous nuclear phase. It is necessary to frequently change the operation mode of the power grid, frequently operate the circuit breaker, Isolation knife switch, there are problems such as long nuclear phase test time, low test efficiency and many hazards

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