An optimization method for primary frequency modulation control of steam drum boiler thermal power unit

Abstract

The invention belongs to the technical field of automatic control of a thermal power generator set and especially relates to a drum boiler thermal power generator set primary frequency modulation control optimization method. The method can be used for primary frequency modulation automatic control of the drum boiler thermal power generator set in the actual operation process, thereby ensuring that primary frequency modulation load is controlled within a reasonable range automatically in the operation process of the thermal power generator set. The method comprises adding a primary frequency modulation boiler master control feed-forward correction control logic, a primary frequency modulation turbine master control feed-forward correction control logic, a primary frequency modulation steam turbine digital electric hydraulic control system DEH correction coefficient control logic and a primary frequency modulation turbine extraction steam amount correction control logic to control logic configuration of a drum boiler thermal power generator set distributed control system DCS. The method can reduce labor intensity of personnel, and the control effect is not dependent on technical levels of operation personnel; and through an existing set distributed control system DCS coordinated control system, the method is good in real-time performance, simple in field debugging process and convenient for engineering realization.

Description

technical field [0001] The invention belongs to the technical field of automatic control of thermal power generating sets, and in particular relates to an optimization method for primary frequency modulation control of a steam drum boiler thermal power generating set. It can be used for the automatic control of the primary frequency regulation of the steam drum boiler thermal power unit in the actual operation process, so as to ensure that the primary frequency regulation load is automatically controlled within a reasonable range during the operation of the unit. Background technique [0002] Primary frequency regulation is an important means for power grid companies to maintain grid frequency stability. For the safety, stability and economical operation of the power grid and to improve the quality of power supply, the power grid company requires that the on-grid thermal power generating units must have the primary frequency modulation function, and put forward specific tech...

AI Technical Summary

Problems solved by technology

Chinese patent "An anti-primary frequency modulation reverse regulator" patent application number 201510072922 discloses a primary frequency modulation reverse regulator, which includes an output circuit, a primary frequency modulation direction judgment circuit, a primary frequency modulation action judgment circuit and AGC action judgment The loop is connected to the unit target power selection judgment circuit, and the unit target power selection judgment circuit is connected to the output circuit; the invention solves the problem of the incomplete design of the primary frequency modulation control system of the generator set that uses the primary frequency modulation technology to maintain the grid frequency in the prior art. , can not adapt to all the working conditions in the production process, causing the power demand corresponding to the frequency change of the power grid to be opposite to the actual power change of the generator set's frequency modulation action, which eventually aggravates the instability of the grid frequency and solves the grid frequency change The corresponding power demand is opposite to the actual power change effect of the first frequency regulation action of the generator set, and there are problems such as affecting the frequency stability of the power system grid

[0004] The above documents mainly elaborate on the online monitoring of the primary frequency modulation, the conventional setting of the primary frequency modulation, and the prevention of reverse adjustment of the primary frequency modulation. The feed correction amount, the DEH correction coefficient of the primary frequency modulation steam turbine digital electro-hydraulic control system, and the primary frequency modulation steam turbine extraction steam correction amount have not been targeted research

Images