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A robust water level control method for drum boilers in coal-fired units

A technology for coal-fired units and drum boilers, applied in the control and energy fields, can solve problems such as control system collapse, and achieve the effects of improving safety, increasing profits, and enhancing anti-interference ability.

Active Publication Date: 2021-10-01
浙江省能源集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional sliding mode control will bring about the problem of control chatter, and even cause the activation of high-frequency unmodeled dynamics, resulting in the collapse of the control system. Therefore, it is necessary to reasonably improve the control law to suppress the control chatter without causing serious negative effects on the control effect. influences

Method used

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  • A robust water level control method for drum boilers in coal-fired units
  • A robust water level control method for drum boilers in coal-fired units
  • A robust water level control method for drum boilers in coal-fired units

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0042] The present invention provides a robust method for controlling the water level of a drum boiler of a coal-fired unit. The flow chart of the control method is as follows figure 1 as shown, figure 2 is the control block diagram of the water supply system, in which, the water level height y of the boiler drum is measured by the water level sensor, and the tracking error is obtained after the comparison link It is input into the sliding mode controller for calculation, and the control law is calculated by the sliding mode controller to output the control input variable u, and u is transmitted to the feed water valve as a signal of the feed water amount, and then co...

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Abstract

The invention discloses a method for controlling the water level of a drum boiler of a coal-fired unit with strong robustness. Set the control target and define the filtering error; determine the boundary of the dynamic uncertainty of the water supply system; design a control law with strong robustness and can suppress control chatter. For the situation of parameter mismatch and operating environment change, the present invention can overcome the uncertainty in the existing model, enhance the robustness of the control system, have anti-interference ability, and improve the control effect as much as possible while ensuring safe production, and then Improve production efficiency and improve power plant profits.

Description

technical field [0001] The invention belongs to the field of control and energy, and in particular relates to a water level control method of a drum boiler of a coal-fired unit with strong robustness. Background technique [0002] In recent years, the energy issue has become the primary problem that countries all over the world need to discuss and solve. Countries and organizations around the world are actively exploring new alternative energy technologies. Among them, renewable energy has been highly valued for its renewable and non-polluting characteristics. With the development of new energy technology, a variety of new energy sources are integrated into the grid, and the energy form is no longer limited to electric energy, but a combination of various energy forms such as electric energy, natural gas energy, and petroleum energy. The challenges brought by grid connection are increasing, and the adjustment ability of traditional coal-fired units needs to be improved. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B35/00F22B37/46
CPCF22B35/00F22B37/46
Inventor 陈积明杨秦敏梁琪解剑波李清毅范海东
Owner 浙江省能源集团有限公司