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ETS protection system in steam turbine emergent interruption protection

A technology for protection systems and steam turbines, applied in the direction of machines/engines, mechanical equipment, engine components, etc., can solve problems such as cross misoperation and unit tripping, and achieve the effect of avoiding cross misoperation

Inactive Publication Date: 2014-07-02
DATANG JIXI THERMAL POWER CO LTD
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  • Abstract
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Problems solved by technology

[0003] The present invention solves the problem that the oil protection system of the hydraulic control system, the vacuum protection system of the condenser and the lubricating oil protection system in the existing steam turbine crisis interruption protection have cross interaction, which is prone to cross misoperation and causes unit tripping , put forward the ETS protection system in the crisis interruption protection of the steam turbine

Method used

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  • ETS protection system in steam turbine emergent interruption protection

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specific Embodiment approach 1

[0024] Specific implementation mode 1. Combination figure 1 Describe this specific embodiment, the ETS protection system in the steam turbine crisis interruption protection described in this specific embodiment includes four condenser vacuum pressure sensors, four hydraulic control system oil pressure sensors, four lubricating oil pressure sensors, four A trip solenoid valve, the first OR gate 13, the second OR gate 14, the third OR gate 15, the fourth OR gate 16, the fifth OR gate 17, the sixth OR gate 18, the seventh OR gate 22 and the eighth OR gate Gate 23, which also includes a first AND gate 19, a second AND gate 20 and a third AND gate 21,

[0025] Any two condenser vacuum pressure sensors in the four condenser vacuum pressure sensors are respectively connected to the first input end and the second input end of the first OR gate 13,

[0026] The output end of the first OR gate 13 is connected with the first input end of the first AND gate 19,

[0027] The other two co...

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Abstract

The invention discloses an ETS protection system in steam turbine emergent interruption protection, and relates to the technical field of steam turbine emergent interruption protection. The problem that in existing steam turbine emergent interruption protection, a hydraulic control system oil protection system, a condenser vacuum protection system and a lubricating oil protection system have the cross interaction, cross maloperation is prone to being caused, and therefore tripping of a unit is caused is solved. By means of the ETS protection system, the logical relationship in the ETS protection system is improved, the improved protection system can give out a tripping signal only when two channels for the condenser vacuum pressure, the hydraulic control system oil pressure or the lubricating oil pressure simultaneously move to give an alarm, and the cross maloperation is accordingly avoided. The ETS protection system is suitable for steam turbine emergent interruption protection.

Description

technical field [0001] The invention relates to the technical field of crisis interruption and protection of steam turbines. Background technique [0002] In the existing ETS protection system (steam turbine tripping protection system), the protection method of "dual channel two out of one" is usually used for lubricating oil pressure, condenser vacuum pressure, and EH (hydraulic control system oil) oil pressure, but this When using the protection method, the occurrence of cross misoperation often occurs. Contents of the invention [0003] The present invention solves the problem that the oil protection system of the hydraulic control system, the vacuum protection system of the condenser and the lubricating oil protection system in the existing steam turbine crisis interruption protection have cross interaction, which is prone to cross misoperation and causes unit tripping , put forward the ETS protection system in the crisis interruption protection of the steam turbine. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D21/00
Inventor 薛龙常征涛刘海泉粱洋李国春韩金朝刘德生杨承郡佘凤武
Owner DATANG JIXI THERMAL POWER CO LTD
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