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Primary frequency modulation system for thermal power plant

A thermal power plant and regulating system technology, which is applied in the direction of steam engine devices, machines/engines, mechanical equipment, etc., can solve the problems of non-linear valve flow curves and complex operation execution, and achieve simple operation and maintenance, less investment and safe operation The effect of high reliability

Pending Publication Date: 2019-04-05
UNI RISING BEIJING TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 2) FM dead zone:
[0026] 2. Valve flow curve is not linear
In this one-time frequency regulation method, the boiler and steam turbine need to operate jointly, and the operation is complicated

Method used

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  • Primary frequency modulation system for thermal power plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046] Example: Primary frequency regulation system of a thermal power plant

[0047] The installed capacity of the thermal power plant is two 300MW units, and both steam turbines participate in primary frequency regulation.

[0048]The large adjustable nozzle type steam booster is used as a bypass device for the high-pressure cylinder and the medium-pressure cylinder of the steam turbine to adjust the load of the steam turbine. This enables the unit to have the primary frequency modulation function and shortens the primary frequency modulation response time.

[0049] The large-scale adjustable nozzle-type steam booster actuator can act and respond within 0.5 seconds, and the load response time of one frequency adjustment is less than 3 seconds required by the technology to start action.

[0050] The large adjustable nozzle type steam generator actuator can realize full opening and closing within 15 seconds, and is not affected by the flow curve of the valve. Not only fast r...

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Abstract

The invention discloses a primary frequency modulation system for a thermal power plant. The primary frequency modulation system for the thermal power plant comprises a steam turbine high-pressure cylinder, a steam turbine medium-pressure cylinder, a high-pressure steam bypass system, a medium-pressure steam bypass system and a thermal load unit, wherein the high-pressure steam bypass system comprises a high-pressure steam increasing machine and a matched pipeline valve; the medium-pressure steam bypass system comprises a medium-pressure steam increasing machine and a matched pipeline valve; and the high-pressure steam bypass system and the medium-pressure steam bypass system are further connected to the thermal load unit separately, and the thermal load unit utilizes steam led out by a bypass for carrying out steam supply application or heat supply application. The primary frequency modulation system for the thermal power plant is capable of realizing rapid response, and high in climbing speed; and bypass adjustment system equipment is all static equipment, simple to operate, run, repair and maintain, and high in running safe reliability.

Description

technical field [0001] The invention belongs to the field of frequency regulation of power grids and thermal power plants, and in particular relates to a primary frequency regulation system of thermal power plants. Background technique [0002] As we all know, the rated frequency of my country's power grid is 50Hz. In the actual operation of the power grid, when the power consumption does not match the power supply, it can cause a small component with a small change in the frequency of the power grid and a short period of change. In the conventional method, this kind of frequency disturbance mainly relies on the regulating system of the steam turbine generator set to directly and automatically adjust the steam turbine gate to complete the grid load compensation and correct the fluctuation of the grid frequency. This process is the primary frequency regulation of the generator set. [0003] The primary frequency regulation function in the electro-hydraulic control system of ...

Claims

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Application Information

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IPC IPC(8): F01K13/02
CPCF01K13/02
Inventor 曲恒郭清温马正中智凯龙
Owner UNI RISING BEIJING TECH CO LTD
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