A variable frequency start-up control method for a heavy-duty gas turbine unit

A technology for gas turbines and units, which is applied to control systems, control generators, electrical components, etc., can solve problems such as sustainability impacts, achieve simple and reliable control, ensure maximum output, and save start-up time.

Active Publication Date: 2015-08-05
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, conventional coal-fired thermal power generating units at home and abroad still occupy a dominant position in the power grid, but due to the constraints of energy supply, environmental pollution, energy structure and other factors, the sustainability of its development is affected

Method used

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  • A variable frequency start-up control method for a heavy-duty gas turbine unit
  • A variable frequency start-up control method for a heavy-duty gas turbine unit

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Embodiment Construction

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0029] figure 1 It shows the flow chart of the heavy-duty gas turbine set frequency conversion start control method in the embodiment of the present invention; the frequency converter collects the machine terminal voltage, machine terminal current and speed signal of the gas turbine set in real time, and the specific steps are:

[0030] (1) After receiving the purge command sent by the monitoring system of the gas turbine unit, the frequency converter enters into the forced commutation working mode, and performs constant torque control on the gas turbine unit; the excitation system of the gas turbine unit controls the excitation current I fd For closed-loop control, the excitation current I fd It is a constant current before the machine terminal voltage reaches the rated vo...

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Abstract

The invention provides a variable frequency starting control method of a heavy-type gas turbine unit. The method comprises the specific steps that A, after receiving a purging command, a frequency changer enters a forced commutation working mode; B, when the rotating speed frequency of the gas turbine unit is the natural commutation frequency, the frequency changer enters a natural commutation working mode; C, after receiving a purging stopping command, the frequency changer enters a locking mode; D, after receiving a starting command, the frequency changer enters a maximum output torque working mode; E, after the voltage of a generator terminal reaches the nominal voltage of the frequency changer, the frequency changer enters a maximum operation power working mode of the gas turbine unit; F, when the rotating speed of the gas turbine unit is the self-sustaining speed, the frequency changer enters a locking mode, and after receiving an exit command, the frequency changer enters the standby state. Compared with the prior art, the variable frequency starting control method of the heavy-type gas turbine unit provides the control strategy for different starting stages and the operation switching mode of the gas turbine unit, and the coordination control over the rotating speed of the gas turbine unit and the voltage of the generator terminal is achieved.

Description

technical field [0001] The invention relates to a gas turbine start-up control method, in particular to a variable-frequency start-up control method for a heavy-duty gas turbine unit. Background technique [0002] At present, conventional coal-fired thermal power generating units at home and abroad still occupy a dominant position in the power grid, but due to the constraints of energy supply, environmental pollution, energy structure and other factors, the sustainability of its development is affected. The world is looking for a new power supply mode, among which the gas-steam combined cycle power generation mode is one of them. This mode has the characteristics of low emission pollution, fast start-up, and good response performance; To achieve the effect of fast peak regulation, regulation or emergency backup, while improving and optimizing the structure of the power system. [0003] The starting methods of the gas turbine unit can be divided into mechanical and electrica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/08
Inventor 王德顺杨波姬联涛桑丙玉叶荣波陶琼崔红芬丁杰吴福保赫卫国陶以彬李官军俞斌叶季蕾薛金花
Owner STATE GRID CORP OF CHINA
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