Electric front water feeding pump system of indirect air cooling unit based on doubly-fed system

Abstract

The invention discloses an electric front water feeding pump system of an indirect air cooling unit based on a doubly-fed system. The electric front water feeding pump system of the indirect air cooling unit based on the doubly-fed system comprises a steel structure indirect air cooling tower and the like. According to the electric front water feeding pump system of the indirect air cooling unit based on the doubly-fed system, a motor of the electric front water feeding pump is changed into a doubly-fed motor, and the rotating speed of the electric front water feeding pump is adjusted through the doubly-fed motor, and the operation working condition of the electric front water feeding pump is adjusted under the condition that the requirement for safe operation of the water feeding pump is met when the working condition of a unit changes; when the speed regulation function of the doubly-fed motor fails, the doubly-fed motor operates at power frequency, and the electric front water feeding pump temporarily operates at a constant speed; the speed regulation range of the doubly-fed motor is set according to the accurate rotating speed range of actual operation of the electric front water feeding pump instead of 0-100%, waste of regulation allowance is avoided, and the manufacturing cost is low. By implementing the electric front water feeding pump system of the indirect air cooling unit based on the doubly-fed system, all operation requirements of the electric front water feeding pump can be met, the adjusting efficiency and the adjusting safety of the electric front water feeding pump in a future high-frequency wide-load application scene 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 an electric pre-feed water pump system of an indirect air-cooling unit 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 con...

AI Technical Summary

Problems solved by technology

At present, the electric pre-feed water pumps of indirect air-cooled units mostly operate at a constant speed. Under variable operating conditions, the electric pre-feed water pumps have low operating efficiency and poor economy. Satisfy the operation requirements of frequent adjustment of indirect air-cooled units

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