Abstract: Power monitoring system is widely used in intelligent buildings. Its advantages of timeliness, stability, safety and convenience improve the efficiency of power use and save costs. The power monitoring system can accurately judge the cause and location of the fault, which provides a strong support for the safety and intelligent development of intelligent buildings

Key words: power monitoring system; Intelligent building; Monitoring system; Electric energy saving

0 Introduction

Intelligent building is a building form that uses computer automatic control function to realize the automation of building information and communication. Power monitoring system plays an important role in intelligent buildings. It provides safe and reliable distribution system for intelligent buildings and plays a very important role in the use and saving of electric energy.

1. Structure of power monitoring system in intelligent building

Intelligent power monitoring system includes centralized monitoring system and other modes. The centralized monitoring system presents a layered distributed structure of communication layer, spacer layer and station control layer, including intelligent distribution instrument, microcomputer integrated protection, intelligent electronic equipment and other devices. All devices use communication protocol to manage the communication management machine through shielded twisted pair, and the background is connected to the Ethernet to run. In HMI view, the control screen, real-time running state, control and modify the system configuration.

The communication layer mainly collects and measures the operating parameters of the distribution system, and then transmits the data to the monitoring system. The equipment used includes multifunctional relay protection device, intelligent network multi-parameter measurement and control instrument, etc. These devices and devices can be configured to operate independently of the main control computer.

The main function of the spacer layer is to complete the communication connection, data exchange and communication protocol conversion between the main control computer, so as to realize the compatibility and extensibility of the system. Connect and share data with the system through Ethernet switches, data servers and gateway servers.

The station control floor is located in the central control room or duty room, equipped with high-performance computers, uninterruptible power supply, alarm devices, etc. Power monitoring software is installed in the main control computer to realize man-machine interface and management functions