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Thermal power generating unit main steam pressure control method and system based on three-stage control series connection

A technology of main steam pressure and thermal power unit, applied in electric controllers, controllers with specific characteristics, etc., can solve problems such as poor applicability, slow response speed of main steam pressure, large dynamic deviation, etc., and achieve improved robustness performance, improve the response speed, and reduce the effect of dynamic deviation

Active Publication Date: 2021-08-17
湖南省湘电试验研究院有限公司
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Problems solved by technology

Practical application shows that due to the poor applicability of PID control to the control characteristics of main steam pressure with large time delay and large time delay, the problems of slow response speed and large dynamic deviation of main steam pressure in the above conventional thermal power unit main steam pressure control methods are difficult to solve Solve the problem by optimizing and adjusting the control parameters of the main steam pressure control method of conventional thermal power units

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  • Thermal power generating unit main steam pressure control method and system based on three-stage control series connection
  • Thermal power generating unit main steam pressure control method and system based on three-stage control series connection
  • Thermal power generating unit main steam pressure control method and system based on three-stage control series connection

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Embodiment Construction

[0034] Hereinafter, a certain 660MW supercritical thermal power unit will be used as the implementation object, and the main steam pressure control method and system of the thermal power unit based on the three-level control in series according to the present invention will be optimized. For the thermal power unit based on the three-level control in series in the present invention The main steam pressure control method and system are further described in detail.

[0035] Such as figure 2 As shown, the main steam pressure control method of thermal power units in series based on three-level control in this embodiment includes:

[0036] 1) Design a three-level controller series structure, the three-level controller series structure includes a multi-model predictive controller, boiler main control and fuel main control connected in series;

[0037] 2) Adjust the parameters of boiler main control and fuel main control in the three-level controller series structure;

[0038] 3) D...

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Abstract

The invention discloses a thermal power generating unit main steam pressure control method and system based on three-stage control series connection, and the method comprises the steps: designing a three-stage controller series connection structure, wherein the three-stage controller series connection structure comprises a multi-model prediction controller, a boiler master controller and a fuel master controller which are sequentially connected in series; setting parameters of boiler master control and fuel master control in the three-stage controller series connection structure; and designing model prediction controllers under multiple working conditions, summing the outputs of the model prediction controllers under the multiple working conditions and then performing accumulating, and taking the accumulated output as the overall output of the multi-model prediction controller. According to the method and system, the main steam pressure control response speed can be improved, the main steam pressure dynamic deviation can be reduced, the automatic power generation control stability can be improved, the fuel quantity can be rapidly adjusted during load changing, and therefore the main steam pressure response speed is increased, and the dynamic deviation is reduced.

Description

technical field [0001] The invention belongs to the technical field of thermal control of thermal power units, and in particular relates to a method and system for controlling main steam pressure of thermal power units based on three-stage control in series. Background technique [0002] The main steam pressure control characteristics of thermal power units have control difficulties such as large time delay, large inertia, and nonlinearity. The response speed of the steam pressure control method is slow, and the dynamic deviation of the main steam pressure is large, which not only affects the safe and stable operation of the unit itself, but also limits the potential of the unit for rapid load change. [0003] At present, the main steam pressure control of conventional thermal power units is completed by the cooperation of the boiler main control and the fuel main control in the coordinated control system (the control block diagram is attached figure 1 shown). Generally sp...

Claims

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Application Information

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IPC IPC(8): G05B11/42
CPCG05B11/42Y02P90/02
Inventor 盛锴邱靖朱晓星陈厚涛寻新王志杰王锡辉
Owner 湖南省湘电试验研究院有限公司
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