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Coal-fired unit drum boiler water level control method for improving transient performance based on parameter self-adaptation

A technology for coal-fired units and drum boilers, applied in the control and energy fields, can solve the problems of inaccurate measurement, affecting control effects, and large water level fluctuations.

Active Publication Date: 2020-02-28
浙江省能源集团有限公司 +1
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Problems solved by technology

However, due to the limitations of measurement technology, the existing measurement methods are inaccurate, which can be regarded as a disturbance, which will affect the control effect; at the same time, the water level fluctuates greatly and the convergence speed is slow, which seriously affects the control effect. Need to improve transient performance while eliminating measurement errors

Method used

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  • Coal-fired unit drum boiler water level control method for improving transient performance based on parameter self-adaptation
  • Coal-fired unit drum boiler water level control method for improving transient performance based on parameter self-adaptation
  • Coal-fired unit drum boiler water level control method for improving transient performance based on parameter self-adaptation

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Embodiment Construction

[0076] 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.

[0077] The present invention provides a water level control method for a coal-fired unit steam drum boiler based on parameter self-adaptive improvement of transient performance. The flow chart of the control method is as follows figure 1 As shown, the block diagram of the control system is shown as figure 2 As shown, among them, the boiler drum water level height y measured by the water level sensor, and the expected water level height x d Get the tracking error e after doing the difference 1 , tracking error e 1 It is transmitted to the adaptive controller, and the control law is calculated by the controller to output the control input variable, which is transmitted...

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Abstract

The invention discloses a coal-fired unit drum boiler water level control method for improving transient performance based on parameter self-adaptation. The method includes the following steps that atransfer function model of a known coal-fired unit drum boiler water feeding system control model is equivalently converted into a state space model, the measuring error is considered, the tracking error is defined, system transformation is carried out through the error conversion technology, a self-adaptive control law is designed for a transformed system, and the error between the water level actual value and the set value of a water feeding system is kept within the error bound preset by a user. Meanwhile, the situations that parameters are unknown and bounded disturbance exists are considered in the control method. The control method can overcome the uncertainty in existing models and enhance the robustness of the control system and has anti-disturbance capacity. In addition, by meansof the method, the transient output error of the system is kept within a preset boundary layer, it can be guaranteed that the overshoot is not too large, the control effect is improved as much as possible while safety production is guaranteed, and then the production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of control and energy, in particular to a water level control method for a drum boiler of a coal-fired unit that improves transient performance based on parameter self-adaptation. Background technique [0002] As countries and organizations around the world are actively exploring new alternative energy technologies, renewable energy has been highly valued for its renewable and non-polluting characteristics. The development of new energy technology has led to the integration of various new energy sources into the grid. 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. However, as multiple energy sources are integrated into the grid The challenges brought about increase, and the regulation ability of traditional coal-fired units needs to be improved, so it is necessary to develop better control methods to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22D5/30F22B35/00F22B35/18G05D9/12
CPCF22B35/00F22B35/18F22D5/30G05D9/12
Inventor 杨秦敏梁琪陈积明范海东解剑波李清毅
Owner 浙江省能源集团有限公司
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