Water supply and condensation water cooperative system of direct air cooling unit based on double-fed system

Abstract

The invention relates to a water supply and condensation water cooperative system of a direct air cooling unit based on a double-fed system. The water supply and condensation water cooperative system comprises an air cooling island, a water supply pump, a condensation water pump, a double-frequency double-fed generator, a cooperative driving steam turbine and the like. According to the water supply and condensation water cooperative system, the cooperative driving steam turbine and the double-frequency double-fed generator are additionally arranged, the double-frequency double-fed generator can output currents with two frequencies at the same time, and after the driving power consumption of the water supply pump and the condensation water pump is met, redundant electric energy is conveyed to a factory power grid at 50 Hz. Under the variable working condition of the unit, the rotating speed of the water supply pump and the rotating speed of the condensation water pump are increased and decreased at the same time, the variable-frequency current output by the double-frequency double-fed generator can be subjected to cooperative driving adjustment according to the operation requirements of the water supply pump and the condensation water pump, and the rotating speed of the pumps is changed so as to change the operation working condition points of the pumps. According to the water supply and condensation water cooperative system of the direct air cooling unit based on the double-fed system, the operation requirements of the water supply and condensation water system can be met, the adjusting efficiency and the adjusting safety of the direct air cooling unit under the high-frequency and wide-load application scene in the future are improved, and the energy-saving potential is huge.

Description

technical field [0001] The invention belongs to the field of power plant boiler and steam turbine systems, and in particular relates to a direct air-cooling unit feedwater and condensate synergy system based on a double-fed system. Background technique [0002] In recent years, my country's wind power, photovoltaic, hydropower and other new energy power installed capacity has continued to grow rapidly, and the installed capacity both in service and under construction has ranked first in the world. New energy sources such as wind power and photovoltaics have provided us with a large amount of clean electricity, but on the other hand, the randomness and instability of their power generation output have also brought great challenges to the safe operation of the power system and the guarantee of power supply. Judging from the current situation, the regulation capacity of my country's power system is difficult to fully meet the requirements of large-scale development and consumpt...

AI Technical Summary

Problems solved by technology

Inverter frequency conversion speed regulation technology is mature, but there are disadvantages such as high equipment cost, harsh operating environment requirements, and heavy operation and maintenance workload.

The performance of the hydraulic coupling is stable, but the greater the slip, the greater the slip heat loss and the lower the adjustment efficiency

These two speed regulation methods are difficult to meet the safety and economical requirements of direct air-cooling units in the future high-frequency and wide-load operation regulation

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