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The Load Shedding Control System of Thermal Power Unit Bypass System in Isolated Grid Mode

A thermal power unit, bypass system technology, applied in the direction of mechanical equipment, engine components, machines/engines, etc., can solve the problems of no steady-state parameters, bypass control reliability and adverse effects on stability, etc., to achieve strong operability , good anti-interference characteristics, intuitive control parameters

Active Publication Date: 2021-06-29
国网四川综合能源服务有限公司 +1
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  • Application Information

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Problems solved by technology

In particular, the unit operating in isolated grid may have frequent frequency modulation and quick load unloading for many times in a row. If the previous quick unloading load has not stabilized, there will be no steady-state parameters for reference in the next quick unloading load, which will affect the reliability and stability of bypass control. adversely affect

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  • The Load Shedding Control System of Thermal Power Unit Bypass System in Isolated Grid Mode
  • The Load Shedding Control System of Thermal Power Unit Bypass System in Isolated Grid Mode
  • The Load Shedding Control System of Thermal Power Unit Bypass System in Isolated Grid Mode

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Embodiment Construction

[0028] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings, which are not intended to limit the protection scope of the present invention.

[0029] A thermal power unit bypass system load shedding control system in the isolated grid mode, which is applied to the thermal power unit bypass control system in the isolated grid, including: a control mode conversion module, an override feedforward calculation module, and a steam parameter control module. , control mode conversion module: used to determine the full load rejection condition and partial load rejection condition according to the real-time monitored load rejection signal and generate conversion instructions, the conversion instructions include quick opening instructions, manual and automatic switching instructions and steam parameter settings instruction;

[0030] Override feed-forward calculation module: used to calculate the override quick-open...

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Abstract

The present invention provides a thermal power unit bypass system load rejection control system in the isolated grid mode, including: a control mode conversion module, an override feedforward calculation module, and a steam parameter control module; wherein, the control mode conversion module is used for real-time Monitor the load shedding signal to determine the full load shedding and partial load shedding conditions, and generate conversion instructions, including quick opening instructions, manual and automatic switching instructions, and steam parameter setting instructions; the override feedforward calculation module is used to Calculate the overriding quick opening amount and adjustment feedforward amount of each regulating loop in the bypass under load conditions and part load rejection conditions; the steam parameter control module is used to adjust the overriding quick opening amount and adjust the feedforward amount according to the acquired conversion command to control. The invention solves the problem of quick response of the load shedding control of the thermal power unit bypass system in the isolated grid mode, and improves the steam parameter control quality.

Description

technical field [0001] The invention relates to the technical field of thermal power unit control, in particular to a thermal power unit bypass system load shedding control system in an isolated grid mode. Background technique [0002] During the grid-connected operation of thermal power units, if a fault occurs on the steam turbine, generator or grid side and causes load shedding, in order to quickly restore power transmission after troubleshooting and avoid economic losses caused by unit shutdown, boilers are used to quickly reduce output and bypass The circuit system can be quickly opened and the steam parameters can be maintained in a stable operation, so that the grid can be connected to the grid quickly after the fault is eliminated. This load shedding control method is the fast cut back (FCB) protection of the unit, which includes three working conditions: tripping of the steam turbine, operation of the steam turbine with utility power and idling of the steam turbine....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D21/00F01D17/00
CPCF01D17/00F01D21/00F01D21/003
Inventor 马睿李恩汤明俊吴广生肖熠雷利
Owner 国网四川综合能源服务有限公司
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