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Multi-stage pulse control method for regulating valve in thermal power plant

A technology of pulse control and regulating valves, which is applied in the direction of valve operation/release devices, valve details, valve devices, etc., can solve the problems of undisclosed multi-stage pulse control methods, achieve excellent dynamic response ability, and simplify the on-site parameter debugging process , tracking the effect of problem simplification

Active Publication Date: 2019-04-09
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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  • Multi-stage pulse control method for regulating valve in thermal power plant
  • Multi-stage pulse control method for regulating valve in thermal power plant

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of 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 regulating valve in a thermal power plant. At the beginning of each switching cycle, the regulator automatically detects the position state of the pulse regulating valve, and controls the error between the output command and the position feedback signal according to the current PID Select one of the multi-level pulses as the effective control signal for this period. In this control method, switch pulses of different levels with different duty ratios are set according to the regulator topology and parameters, and these control pulses with different levels of strength form a pulse sequence to realize the swit...

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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 in a thermal power plant, and belongs to the technical field of thermal automation positioning control of final control elements in a thermal power plant. Background technique [0002] At present, my country's automatic control instruments are used in thermal power plants, including electric unit combination instruments, assembly component instruments, single-loop regulators, and most of the distributed control systems (DCS). These instruments are either analog or For digital, their PID adjustment units are all continuous volume regulators, all of which use 4-20mA as the output signal, and the execution circuit realizes the positioning control of the valve through a first-stage 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 an automati...

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Application Information

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Patent Type & Authority Patents(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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