[China Meter Network Instrument Research and Development] Recently, the Yangzi Petrochemical Thermal Power Plant successfully developed the intelligent thermal power plant extraction steam coordinated control system. This system is followed by a thermoelectric industry advanced since the plant achieved the steam boiler tube pressure coordination and automatic pressure control for the jellyfish tube. The successful development and application of control. The steam extraction coordinated control system realizes the automatic control of the steam turbine exhaust steam tube pressure, heat-set power and load distribution, so as to maximize the unit operating efficiency and achieve the purpose of energy saving and consumption reduction. According to calculations, it can reduce the annual efficiency of more than 20 million yuan.
The way in which several steam turbines are operated in parallel and steam is extracted from the same parent pipe to meet the heating demand is called the steam extraction master control operation mode. The steam extraction parent pipe is used in petrochemical, metallurgy, papermaking, cogeneration, central heating and other industries. Wide range of applications. Electricity and steam are the main products of thermal power plants, especially steam products, which are crucial for ensuring the stable production of chemical plants, and the quality assurance and optimization of extraction are the key factors.
For a long time, the extraction steam pipe system of the Yangzi Petrochemical Co., Ltd. power plant is basically under manual control, and improper matching between the voltage regulator and the power modulating unit makes it difficult to achieve heat-set power. Because of the different characteristics of the steam turbine, the unreasonable extraction distribution leads to high energy consumption. Large fluctuations in the pressure of the steam turbine lead to reduced efficiency, and the safety of production and product quality of heat users is also constrained. Therefore, the development of an automated control system for a steam extraction system is necessary.
However, the extraction steam pipe system is a very complicated system with complex operating conditions and many disturbance factors. Therefore, at present, the steam turbine extractor systems running in parallel in China are basically in the manual adjustment state.
In order to solve this problem, Yangzi Petrochemical Co., Ltd. cooperated with domestic research institutes and developed a smart coordinating pressure control system for thermal power plants for two years. The system solves the multi-machine control problem, increases the anti-jamming capability caused by internal and external loads, realizes the thermoelectric production rule that ensures the heat supply with the real-time adjustment of the power generation amount, and realizes the automatic control of the load distribution of the steam turbine. Loads are optimized in real time, with the lowest operating costs and maximum benefits. The successful implementation of this project will not only improve the automation level and safety and stability of the Yangzi Thermal Power Plant, but also establish a technical model for the national hot industry, and it will have great promotion value in the thermoelectric industry.
(Original title: Yangzi Petrochemical Intelligent Extraction Control System fills domestic gaps)
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