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Multistage pulse control method for thermal power plant regulation valve

A technology of pulse control and regulating valve, which is applied in the direction of valve operation/release device, valve details, valve device, etc., can solve the problems of undisclosed multi-stage pulse control method, etc., achieve excellent dynamic response ability, easy engineering realization, on-site Simple effect of parameter debugging process

Active Publication Date: 2017-11-03
HUADIAN ELECTRIC POWER SCI INST CO LTD
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Problems solved by technology

The patent does not disclose the control method of multi-stage pulse

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  • Multistage pulse control method for thermal power plant regulation valve
  • Multistage pulse control method for thermal power plant regulation valve

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and through the examples. The following examples are to explain the present invention and the present invention is not limited to the following examples.

[0022] Example.

[0023] see figure 1 .

[0024] This embodiment is a multi-stage pulse control method for a control valve in a thermal power plant. At the beginning of each switching cycle, the regulator automatically detects the position state of the pulse control valve, and controls the error between the output command and the position feedback signal according to the current PID control. Select one of the multi-level pulses as the effective control signal of the cycle. In this control method, switching pulses at different levels with different duty ratios are set according to the regulator topology and parameters, and these control pulses with different strength levels form a pulse sequence to realize t...

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Abstract

The invention relates to a multistage pulse control method for a thermal power plant regulation valve. The method sequentially comprises the following steps that (1) a single circuit control logic is formed by a manual controller and a PID regulation unit, and an output instruction of the manual controller is introduced into a deviation value control circuit of the pulse regulation valve; (2) a deviation value of the output instruction of the manual controller and a position feedback pulse signal of the pulse regulation valve is generated, and a multistage control switching pulse is calculated through the deviation value; and (3) after the step (2) is completed, a control system is put into actual operation, and control parameters are adjusted online according to the real time value of a regulated variable of the control system and an action characteristic curve of the pulse regulation valve. Through the method, a pulse regulation valve system has the optimal transient performance and robustness, so that control over the regulated variable is more rapid and accurate.

Description

technical field [0001] The invention relates to a multi-stage pulse control method for a regulating valve of a thermal power plant, and belongs to the technical field of thermal automation positioning control of a final control element of a thermal power plant. Background technique [0002] At present, my country's automatic control instruments used in thermal power plants include electric unit combination instruments, assembled component instruments, single-loop regulators, and most of the distributed control systems (DCS) used. These instruments are either analog, or Digital, their PID adjustment units are all continuous regulators, all take 4-20mA as the output signal, and the execution loop realizes the positioning control of the valve through the first-level servo amplification. In particular, from the end of the 1980s to the mid-1990s, my country imported a total of 10 thermal power generating units from the former Soviet Union, which used the automatic adjustment syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/02
CPCF16K31/02
Inventor 揭其良王文杰蒋翀刘国华王礼孙永斌唐浩源杨让民
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD
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