Wind-driven magnetic suspension vertical shaft seawater desalination system and control method thereof

Abstract

The invention discloses a wind-driven magnetic suspension vertical shaft seawater desalination system and a control method thereof. A vertical shaft wind turbine is adopted to directly drive a high-pressure water pump, current regulation and control of a suspension winding of a disc-type motor are combined, and a fan is suspended based on a four-point suspension control method; according to requirements of fresh water, wind energy capture power and high-pressure pump rated power, an algorithm is determined by adopting a pump diaphragm, and the high-pressure water pump and a reverse osmosis membrane component are switched; on the basis of a rotor flux linkage orientation strategy and electromagnetic torque regulation and control of the disc-type motor, coarse and fine regulation of wind energy capture and power control are achieved; a multi-layer fan blade trapezoid structure is adopted, the suspension winding and an iron core are moved downwards to the bottom end of a fan rotating body, and thus, the fan rotating body is more stable in suspension; and by adopting hybrid energy storage of a storage battery and a high-pressure tank, multi-working modes of seawater desalination such as suspension electric drive, suspension capture, and damping rated rotating speed are achieved, and wind energy utilization, seawater desalination efficiency and diaphragm desalination service life are synergistically improved. The effective implementation of the system and the method can greatly promote offshore wind power and the seawater desalination to be practical.

Description

technical field [0001] The invention relates to a wind-powered seawater desalination system, in particular to a wind-force magnetic levitation vertical axis seawater desalination system and a control method for solving the shortage of fresh water resources, belonging to the field of wind-electromagnetic levitation. Background technique [0002] With the worsening of water shortage and energy crisis, the seawater desalination system powered by new energy has attracted more and more attention from all over the world. Wind power resources have a large capacity and are strictly non-polluting. They are especially suitable for solving remote islands without grid access. Electric energy and fresh water resources seriously affect the quality of life of island residents. However, wind resources and seawater resources are abundant. The development of seawater desalination based on wind energy is the solution to water resources. Deficiency is an effective means to improve the quality o...

AI Technical Summary

Problems solved by technology

However, traditional wind power generation is mostly a horizontal-axis wind power generation system, and its energy interaction with seawater desalination devices adopts a wind-machine-electricity coupling energy supply structure. There are many energy conversion links, and the efficiency of wind energy utilization and seawater desalination is generally low. Seawater desalination efficiency is severely restricted due to high wind energy and volatility, especially for reverse osmosis membrane seawater desalination, which is not suitable for frequent changes in working conditions, frequent fluctuations in wind energy seriously affect seawater desalination efficiency and membrane component life aging

At present, most of the wind turbines in the wind-powered seawater desalination system use horizontal-axis wind turbines. The power generated by the wind turbines fluctuates greatly, and the failure rate of the horizontal-axis yaw windward device is high, which undoubtedly increases the cost of seawater desalination, and the desalination pressure of seawater desalination membrane modules Most of the control adopts a simple shutdown structure. Although battery energy storage is also used to stabilize wind energy fluctuations, frequent charging and discharging of electrodes will easily lead to a reduction in battery life and increase desalination costs. Therefore, it is necessary to study a method that can reduce wind energy conversion. The wind-driven seawater desalination system with coexistence of energy storage methods will really promote the real practicality of the wind-driven seawater desalination system

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