CN-122015077-A - Forward acceleration device and system controller facing process

Abstract

The invention discloses a forward acceleration device and a controller of a system facing a process, wherein the device comprises a first addition link, a limiting integrator, a differentiator, a forward output controller and a second addition link, the limiting integrator comprises an integrator and an integrator limiting controller, and the integrator limiting controller is used for limiting the output of the integrator. The first adding unit is configured to add the output signal of the integrator and the external process signal, accelerate the external process signal, and output an acceleration signal to the differentiator. The invention can advance the forward control quantity and has better effect on inhibiting the forward overtemperature of the overheat steam temperature control system.

Inventors

• LI JUN

Assignees

• 广东电网有限责任公司电力科学研究院

Dates

Publication Date

20260512

Application Date

20260212

Claims (9)

1. 1. The forward acceleration device facing the process is characterized by comprising a first addition link, a limiting integrator, a differentiator, a forward output controller and a second addition link, wherein the limiting integrator comprises an integrator and an integrator limiting controller; The first input end of the first addition link is used for receiving an external process signal, the second input end of the first addition link is connected with the output end of the integrator, the output end of the first addition link is connected with the input end of the integrator and the input end of the differentiator, the output end of the differentiator is connected with the input end of the forward output controller, the output end of the forward output controller is connected with the first input end of the second addition link, the second input end of the second addition link is used for receiving the external process signal, and the output end of the second addition link is used for outputting the external process signal after the forward signal is overlapped; The first adding unit is configured to add the output signal of the integrator and the external process signal, accelerate the external process signal, and output an acceleration signal to the differentiator.
2. 2. The forward acceleration apparatus of claim 1, wherein the forward output controller is configured to extract a forward signal from the differentiator output signal and output the extracted forward signal to the first input of the second summing element.
3. 3. The process-oriented forward acceleration device of claim 1, wherein the differentiator is configured to extract a differentiated signal of the acceleration signal.
4. 4. The forward acceleration apparatus of claim 1, wherein the second adding unit is configured to add the forward signal to the external process signal and output the external process signal after the superimposed forward signal through an output terminal.
5. 5. The process-oriented forward acceleration device of claim 1, wherein the transfer function of the integrator clipping controller is: where I (T) is the integrator output signal, PV IN (T) is the external process signal, s is the laplace operator, and T I is the integration time constant.
6. 6. The process-oriented forward acceleration device of claim 1, wherein the forward output controller has a transfer function of: , Wherein FOC (t) is the output signal of the forward output controller, and D (t) is the output signal of the differentiator.
7. 7. The process-oriented forward acceleration device of claim 1, wherein the transfer function of the differentiator is: , where D(s) is the transfer function of the differentiator, s is the laplace operator, and T D is the differentiation time constant.
8. 8. The process-oriented forward acceleration device of claim 1, wherein the transfer function of the integrator is: , where I(s) is the transfer function of the integrator, s is the laplace operator, and T I is the integration time constant.
9. 9. A process-oriented forward acceleration system controller, comprising a cascade proportional controller, an engineering fastest integrator, a third addition element, a process-oriented forward acceleration device according to any one of claims 1-8, and a negative proportional element; The input end of the cascade proportional controller receives a deviation signal of process setting and process output, and the output end of the cascade proportional controller is connected with the input end of the engineering fastest integrator and the input end of the forward acceleration device facing the process; the output end of the engineering fastest integrator is connected with the first input end of the third addition link, the second input end of the third addition link is connected with the output end of the forward acceleration device facing the process, and the output end of the third addition link is connected with the input end of the negative proportion link; the negative proportion link is used for outputting a control signal to a control process, and the process output is obtained at the output end of the control process.

Description

Forward acceleration device and system controller facing process Technical Field The present invention relates to the field of process control technologies, and in particular, to a forward acceleration device and a controller for a system for a process. Background In the process control practice, for example, an overheat steam temperature control system of a thermal power unit often has an overheat problem of overheat steam temperature, the problem of forward overheat is relatively more serious, and the prior art adopts a one-position control method aiming at the problem of forward overheat of overheat steam temperature, namely when the forward deviation of overheat steam temperature exceeds a certain amplitude, a fixed opening degree is increased by controlling a temperature reducing water valve, and the main problems are control lag and limited effect. This causes a hysteresis problem for the control of the system process, since the superheated steam temperature takes a certain time from zero deviation to a certain positive deviation. Disclosure of Invention The embodiment of the invention provides a forward acceleration device and a controller of a system for a process, which are applied to an overheat steam temperature control system of a thermal power unit, can advance forward control quantity, and have a good effect on inhibiting forward overtemperature of the overheat steam temperature control system. In order to achieve the above objective, a first aspect of the embodiments of the present application provides a forward acceleration device facing a process, including a first adding link, a clipping integrator, a differentiator, a forward output controller, and a second adding link, where the clipping integrator includes an integrator and an integrator clipping controller; The first input end of the first addition link is used for receiving an external process signal, the second input end of the first addition link is connected with the output end of the integrator, the output end of the first addition link is connected with the input end of the integrator and the input end of the differentiator, the output end of the differentiator is connected with the input end of the forward output controller, the output end of the forward output controller is connected with the first input end of the second addition link, the second input end of the second addition link is used for receiving the external process signal, and the output end of the second addition link is used for outputting the external process signal after the forward signal is overlapped; The first adding unit is configured to add the output signal of the integrator and the external process signal, accelerate the external process signal, and output an acceleration signal to the differentiator. In a possible implementation manner of the first aspect, the forward output controller is configured to extract a forward signal from the differentiator output signal and output the extracted forward signal to the first input terminal of the second adding link. In a possible implementation manner of the first aspect, the differentiator is configured to extract a differentiated signal of the acceleration signal. In a possible implementation manner of the first aspect, the second adding unit is configured to add the forward signal to the external process signal and output the external process signal after the forward signal is superimposed through an output terminal. In a possible implementation manner of the first aspect, the transfer function of the integrator clipping controller is: where I (T) is the integrator output signal, PV IN (T) is the external process signal, s is the laplace operator, and T I is the integration time constant. In a possible implementation manner of the first aspect, the transfer function of the forward output controller is: , Wherein FOC (t) is the output signal of the forward output controller, and D (t) is the output signal of the differentiator. In a possible implementation manner of the first aspect, the transfer function of the differentiator is: , where D(s) is the transfer function of the differentiator, s is the laplace operator, and T D is the differentiation time constant. In a possible implementation manner of the first aspect, a transfer function of the integrator is: , where I(s) is the transfer function of the integrator, s is the laplace operator, and T I is the integration time constant. A second aspect of the embodiment of the present application provides a controller for a forward acceleration system facing a process, which is applied to the plurality of error calculation units, and includes: the system comprises a cascade proportional controller, an engineering fastest integrator, a third addition link, a forward acceleration device facing the process and a negative proportional link; The input end of the cascade proportional controller receives a deviation signal of process setting and process output, and the o