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

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...

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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 efficiency, waste of medicines and inability to determine the amount of dosing in the current thermal power plant water treatment process. The problem of meeting the water standard requirements

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