Control method and control system for water feed pump turbine

A technology for feeding water pump steam turbines and control methods, which is applied in the direction of mechanical equipment, engine components, machines/engines, etc., and can solve problems such as rising exhaust pressure of small steam turbines and failure of output of small steam turbines to meet requirements, so as to achieve simple operation process and easy solution The effect of increasing the back pressure of the condenser

Inactive Publication Date: 2014-11-19
HUADIAN POWER INTERNATIONAL CORPORATION LTD +2
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Problems solved by technology

Huadian Shandong Qingdao Co., Ltd. #2 power unit after the high back pressure heating transformation, the back pressure of the condenser of the unit increased, and t

Method used

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  • Control method and control system for water feed pump turbine
  • Control method and control system for water feed pump turbine
  • Control method and control system for water feed pump turbine

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[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The following description is only for demonstration and explanation, and does not limit the present invention in any form.

[0031] In order to realize the safety and economy of the operation of the feed pump steam turbine under the premise of the heating period and the non-heating period thermal process, the heating period (that is, the high back pressure working condition) uses cold and then as the steam source of the small unit, and the non-heating period (I.e. pure condensing condition) use four-pump as the steam source of the small engine, such as figure 1 As shown, the operation method of this kind of feed pump steam turbine suitable for heating and pure condensing dual mode includes the following steps: S1, replacing the rotor and cylinder of the small steam turbine of the existing electric power unit to meet both high back pressure and pure ...

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Abstract

The invention discloses a control method and a control system for a water feed pump turbine. An independent manual operating device is added to a pipeline valve again under a high back pressure working condition, the logic that the pipeline valve cannot be opened until the fully open state of a low pressure valve is removed, an auxiliary steam source is used when impulse starting is carried out on a small turbine, after the cold-recycling pressure of a generator unit load belt meets requirements, an operator manually switches the steam source of the small turbine, the small turbine merely uses a cold-recycling steam source under a high back pressure operation working station, a four-section steam pumping system is separated from the auxiliary steam source, and after the pipeline valve is fully opened or opened to a certain opening degree, the rotating speed of the small turbine is still controlled through the valve of a small turbine unit. The control method and control system for the water feed pump turbine can be applied to a heat supply mode and a pure condensation mode, the safety and economy requirements for operation of the water feed pump turbine on the premise of the thermal process of a heat supply period and a non-heat-supply period can be met.

Description

technical field [0001] The invention relates to the technical field of feedwater pump turbines, in particular to a control method and control system for feedwater pump steam turbines in dual modes of heat supply and pure condensation for power plant equipment. Background technique [0002] The feedwater pump turbine is one of the main components of the thermal cycle system of the power station, especially in the ultra-supercritical unit with high parameters and large capacity. Its safe and reliable operation directly affects the operation of the entire power station equipment. The working task of the feedwater pump steam turbine is to drive the feedwater pump, which must meet the water supply requirements required by the boiler. The steam for the feedwater pump steam turbine is supplied by high-pressure steam source or low-pressure steam source. The steam in the cold section), the low-pressure steam source comes from the fourth section of the main engine, and the steam is di...

Claims

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Application Information

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IPC IPC(8): F01D21/00F01D15/08
Inventor 黄鹏刘克军苏振勇宋岩王修成姜维军宋海宾李从国王刚高鹏
Owner HUADIAN POWER INTERNATIONAL CORPORATION LTD
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