PSO-LSSVM-based on-line control method and apparatus for dosing of water island

A control method, the technology of Mizushima, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve problems such as low work efficiency, waste of medicines, and inability to meet the requirements of effluent standards

Active Publication Date: 2017-02-01
大唐(北京)水务工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the above problems, the object of the present invention is to provide a PSO-LSSVM-based water island dosing online control method and device, to solve the low work ef

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  • PSO-LSSVM-based on-line control method and apparatus for dosing of water island
  • PSO-LSSVM-based on-line control method and apparatus for dosing of water island
  • PSO-LSSVM-based on-line control method and apparatus for dosing of water island

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Embodiment 1

[0030] refer to figure 1 , shows an embodiment of an online control method for water island dosing based on PSO-LSSVM. This embodiment aims at the obvious hysteresis and constancy of the water treatment and dosing system in thermal power plants, combined with LSSVM nonlinear time series prediction As well as the characteristics of PSO parameter optimization, select the inflow monitoring indicators and dosing amount of the corresponding period when the historical water output indicators meet the requirements as samples, use the LSSVM model for sample training, and apply the PSO algorithm to optimize the parameters of the LSSVM model, and finally get the water island The drug dosing model is used to realize intelligent dynamic real-time drug dosing. The method of this embodiment specifically includes the following steps S102 to S112.

[0031] Step S102: Acquiring M groups of historical parameter values ​​of incoming water monitoring indicators for which the outlet water index me...

Embodiment 2

[0044] This embodiment shows a preferred embodiment based on the above-mentioned embodiment 1. The PSO-LSSVM-based online control method for water island dosing provided in this embodiment is aimed at the current production process of water treatment in thermal power plants that only relies on Experience and traditional dosing models are difficult to guarantee the online optimization analysis of dosing amount, and the PSO algorithm falls into the local optimum problem. Using chaos theory to generate the initial population and improve the ergodicity, randomness and diversity of the initial population can avoid PSO randomness. The quality of the initial population is poor and it is concentrated in some local areas so that the algorithm falls into a local optimum. PSO is referenced to the LSSVM training samples to determine the optimal parameters and realize intelligent dynamic water treatment dosing. The specific instructions are as follows:

[0045]Step 1. Obtain the digital si...

Embodiment 3

[0077] Such as Figure 10 As shown, this embodiment provides a PSO-LSSVM-based water island dosing online control device, the control device is applied in the water treatment system of a thermal power plant, and specifically includes a historical data acquisition module 10, a model building module 20, a parameter An optimization module 30 , a real-time monitoring module 40 and a dosage control module 50 .

[0078] Wherein, the historical data acquisition module 10 is used to obtain the M groups of historical parameter values ​​of the incoming water monitoring index that meet the requirements of the water outlet index, and the historical dosing amount of the dosing agent corresponding to each group of historical parameter values, wherein the incoming water monitoring index Including a plurality of indicators, each group of historical parameter values ​​includes the parameter values ​​of a plurality of indicators; the model building module 20 is used to establish an online contr...

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Abstract

The invention discloses a PSO-LSSVM-based on-line control method and apparatus for dosing of a water island. The method comprises: M groups of historical parameter values with outgoing water indexes meeting requirements of an incoming water monitoring index as well as a historical dosing amount of a dosing drug corresponding to each historical parameter value group are obtained; on the basis of a least-squares support vector machine, an on-line control LSSVM model is established, wherein the historical parameter values are input vectors of the LSSVM model and historical dosing amounts are output vectors of the LSSVM model; a PSO algorithm is executed on the LSSVM model and an optimal solution of parameters in the LSSVM model is calculated; and the calculated optimal solution is inputted into the LSSVM model to obtain a dosing model of a water island; an incoming water monitoring index is monitored in real time to obtain a group of real-time parameter values; and real-time parameter values are inputted into the dosing model of the water island and the dosing amounts of the dosing drugs at a current time are determined. With the method, the influence on the operating process by the quality of incoming water can be eliminated; the dosing amount is updated in real time; the drug wasting is reduced; and thus costs are lowered.

Description

technical field [0001] The invention belongs to the technical field of water treatment in thermal power plants, and in particular relates to an online control method and device for dosing in water islands based on PSO-LSSVM, which can be used to automatically control the dosing amount. Background technique [0002] A thermal power plant, referred to as a thermal power plant, is a factory that uses coal, oil, and natural gas as fuel to produce electric energy. Its basic production process is: the fuel is burned in a boiler to heat water to generate steam, and the chemical energy of the fuel is converted into heat energy, and then the steam The pressure pushes the steam turbine to rotate, converting thermal energy into mechanical energy, and finally the steam turbine drives the generator to rotate, converting the mechanical energy into electrical energy. [0003] In modern thermal power plants above 300MW, the water treatment system has basically realized the DCS automatic con...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 秦栋陈慧艳刘宁
Owner 大唐(北京)水务工程技术有限公司
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