Research On Control Platform Of Building Electrical Equipment Based On Device Level Ring

In the centralized architecture of the current automatic control system for construction equipment,there are problems such as lacking flexibility in the networking terminal equipment,inefficient communication coordination among equipment,inability to share information locally and control linkage.This paper analyzed the main characteristics of the Ethernet ring network structure.Based on the Device Level Ring structure produced by Rockwell Automation,a spatially oriented and plug-and-play flat building electrical equipment control platform was proposed.The proposed control platform can realize energy-saving control of lighting system,optimized control of terminal devices of variable air volume air-conditioning system,collect and predict building power consumption.Futhermore,a linkage plan between various building subsystems was designed.The building equipment information can be monitored through the mobile terminals of computers and mobile phones.The main research contents of this article are as follows:(1)This paper analyzed the shortcomings of the current construction equipment automatic control system and the application status of industrial Ethernet.Combining with the advantages of Device Level Ring network,a plug-and-play control system scheme for building electrical equipment is proposed.Fuzzy control of LED lighting was realized by using CompactLogix L36 ERM controller,which achieves 30.8% energy saving effect.(2)The operation mechanism of VAV air conditioning terminal device and the feasibility of its application in Device Level Ring network were analyzed.An improved scheme was designed to replace the traditional air valve with a variable frequency fan as the VAV air conditioning terminal device.The hardware-in-the-loop simulation platform was built by using the CompactLogixL35 E controller,PowerFlex40 inverter and MATLAB/SIMULINK.Through fuzzy PID control of frequency converter,the temperature control simulation of VAV air conditioning system under Device Level Ring network was realized.(3)The monitoring and management of building electricity were carried out based on the electric energy measuring equipment supporting the Device Level Ring network,which realizes the combination of building electricity consumption monitoring and building equipment automatic control system.The real-time partition measurement of building electricity consumption was completed,and the particle swarm BP neural network was used to analyze the electricity consumption data,thus realizing the prediction of building electricity consumption load with a prediction error of less than 6%.(4)According to the characteristics of the linkage work of the various building subsystems,the linkage scheme was designed,and the local linkage control was realized in the CompactLogix L36 ERM controller.The monitoring design of the building equipment information was performed using FactoryTalk View,which is released through Web browser to achieve remote monitoring of the operating status of building equipment.This paper presents a spatial distribution-oriented,plug-and-play and flat automatic control system scheme for building electrical equipment.Through lighting control,variable-frequency air-conditioning terminal control,building power monitoring and prediction,the feasibility of application of Device Level Ring network in building electrical equipment control system is verified,which provides reference for optimization and improvement of building electrical equipment automatic control system.