Intelligent frequency conversion control cabinet and control method thereof

Abstract

The invention discloses an intelligent frequency conversion control cabinet comprising a control cabinet body, and a DDC, a frequency converter, a soft starter, a contactor, an operation display panel, an intelligent electric meter and a thermal module which are installed in the control cabinet body; the operation display panel is provided with manual start-stop buttons, and variable frequency / power frequency and local / remote selector knobs; the DDC is controlled through these buttons and knobs so that the contactor, the frequency converter and the soft starter are controlled, and the DDC is connected to all on-site sensors through sensor interfaces; meanwhile, the DDC is further connected to a network controller through a cable, so that the operating data of the intelligent frequency conversion control cabinet is uploaded to a remote upper computer, and the system operation can be monitored conveniently and remotely. The intelligent frequency conversion control cabinet disclosed by the invention has the functions of energy efficiency monitoring, automatic control, energy-saving control and regulation, and energy use safety monitoring and alarm.

Description

technical field [0001] The invention relates to the technical field of energy and energy-saving control, in particular to an intelligent frequency conversion control cabinet and its control method; it belongs to equipment such as circulating water pumps and fan equipment in ventilation and air-conditioning systems, circulating water pumps in heating systems, domestic and fire-fighting water pumps, etc. Carry out the design of automation and intelligent frequency conversion energy-saving control. Background technique [0002] With the rapid development of my country's social economy, my country's power consumption and power supply demand remain high. According to statistics, the largest air-conditioning load in the country has reached 230 million kilowatts, and the air-conditioning load accounts for 30%-40% of the peak load in summer, and even reaches 50% in central cities such as Beijing, Shanghai, Guangzhou, and Nanjing. It is the general trend to save energy and reduce co...

AI Technical Summary

Problems solved by technology

Most of the equipment such as circulating water pumps and fans in the ventilation and air conditioning control system work in the power frequency state. The operators determine the number of equipment such as the main engine, water pumps, cooling tower fans and other equipment based on past operating experience, temperature and pressure of supply and return water, and manually Complete the start-stop and loading / unloading control of the unit. Even if some fans and pumps are equipped with frequency converters, the fixed operating frequency is manually set, which cannot really adapt to the operating environment of the system. It is difficult to fully consider the influence of many factors. Ventilation The energy consumption of the air conditioning system inevitably brings a lot of waste

The physical and mental burden of the operating personnel is heavy, and the management personnel cannot display, record and store the operating parameters of the equipment through the computer, and cannot perform statistics, analysis and other management work

More importantly, the ventilation and air-conditioning system is relatively complex, with high requirements for safety and reliability. It is very easy to cause safety accidents due to misoperation if it is only monitored and operated by humans.

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