No.0 high-pressure heater optimization control system based on multi-data judgment

Abstract

The invention relates to a No.0 high-pressure heater optimization control system based on multi-data judgment. The No.0 high-pressure heater optimization control system comprises four control levels, namely a heating pipe control level, an environmental protection control level, an economic control level and a primary frequency modulation control level. Full-process automatic commissioning of a No.0 high-pressure heater after unit starting and grid connection is realized through the four control levels. According to thermal control measurement values such as 0 extraction pressure, 0 extraction temperature, outlet temperature of the No.0 high-pressure heater, upper and lower wall temperatures of a 0 extraction pipeline, steam inlet pressure of the No.0 high-pressure heater, unit load and a primary frequency modulation slip signal, optimization of heating pipe control, environmental protection control, economic control and primary frequency modulation control of the No.0 high-pressure heater is realized. Thus, the outlet smoke temperature of a coal economizer is improved, the environmental protection level of a unit is greatly improved, and the economic performance of the unit is improved to the maximum extent. The frequency modulation load basically meets the small disturbance requirement, so that different control targets are achieved at different operation stages of the unit of the No.0 high-pressure heater, and the maximum economic value of the unit is achieved from the three aspects of energy conservation, environmental protection and frequency modulation.

Description

technical field [0001] The invention relates to the technical field of automatic control of thermal power plants, in particular to a No. 0 height plus optimization control system based on multi-data judgment. Background technique [0002] As the requirements for energy saving, emission reduction and environmental protection are getting higher and higher, domestic power generation groups pay special attention to the application of new technologies for energy saving and environmental protection when building or expanding thermal power units. No. 0 high-pressure heater (No. 0 high-pressure heater) is a new technology with energy-saving and emission-reducing benefits. It can not only increase the flue gas temperature at the denitrification inlet at low load, meet the SCR catalyst activation temperature in a wider range, but also increase the partial load The combined use of the feed water temperature and the low-temperature economizer can improve the economy of the unit to the g...

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Problems solved by technology

[0003] At present, domestic power plants with No. 0 high addition have been put into operation, and the overall operation effect of No. 0 high addition is poor. The main problems are as follows: the temperature rise of the pipeline is not well controlled when it is put into operation, and there is a phenomenon of large vibration of the pipeline; No. 0 No in-depth economic analysis has been carried out by Gaojia; the contribution of No. 0 Gaojia to environmental protection has not been thoroughly investigated and analyzed; the primary frequency adjustment capability of No. 0 Gaojia has not been tested and applied

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