Power Reference

In order to respond to the requirements of the national thermal power flexibility transformation policy, improve the deep peak shaving capacity of thermal power units during the heating period, and enhance the competitiveness and profitability of thermal power units in the electricity auxiliary service peak shaving market, the zero output heat supply transformation of low pressure cylinders of thermal power plant units (also known as the “transformation of removing steam from low pressure cylinders”) has been carried out successively since 2018. The project is mainly located in thermal power plants with steam extraction heating load in northeast, north and northwest China.
The zero output technical transformation of the low pressure cylinder to improve the flexibility of the heat supply unit. Under the high vacuum operation condition of the low pressure cylinder, a fully sealed hydraulic butterfly valve is used to cut off the steam inlet of the original steam inlet pipe of the low pressure cylinder, and a small amount of cooling steam is introduced through the new bypass pipe to take away the blast heat generated by the rotation of the low pressure rotor after cutting off the steam inlet of the low pressure cylinder.