Design and Application of Power Monitoring System in Intelligent Power Distribution Cabinet

This paper introduces the power monitoring system based on human-machine interface, intelligent electric measuring instrument and motor protector, which is designed and implemented by intelligent power distribution cabinet incoming line, feeder line, and outgoing line distributed acquisition and centralized control management.

Ankerui Electric Co., Ltd.




Abstract: This paper introduces the power monitoring system based on human-machine interface, intelligent electric measuring instrument and motor protector, which is designed to realize the distributed distribution and centralized control of intelligent power distribution cabinet incoming, feeder and outgoing circuits. The system realizes man-machine. The unmanned function of the interface in the intelligent power distribution cabinet eliminates the cumbersomeness of on-site operation of the on-duty personnel, reduces the error of manual operation, improves the quality of power supply and management level, and has the advantages of concise and practical, low investment, etc. Application prospects.




Keywords: human-machine interface; smart meter; power monitoring; intelligent power distribution cabinet




0 Preface

The intelligent power distribution cabinet is a power distribution cabinet that collects all energy data comprehensively, provides high-precision measurement data for the terminal energy monitoring system, and reflects the power parameters and power quality data in real time through the display unit, and communicates to the background control system through digital communication. In order to achieve effective management of real-time monitoring and operation quality of the entire distribution system, as the development trend of intelligent distribution industry today, power monitoring system is a very important part of distribution automation control, the main functions include: data acquisition and Display, data logging, export, real-time display of field device health, recording, etc.

Taking an electric power distribution cabinet power monitoring and management system of an electric appliance company as an example, this paper proposes to design a set of intelligent intelligent power monitoring and management system using touch screen and smart meter, motor protector and circuit breaker module [1] applied to the distribution cabinet inlet line. In the feeder line and the outlet circuit, real-time monitoring and management are realized for the operating parameters and operating conditions of the electrical equipment of each circuit of the power distribution cabinet.




1 Project introduction

The power monitoring system can monitor the power consumption of each loop device by using the power meter, display and store it in real time through centralized collection and display terminals, and can export data of one work cycle, which is convenient for system and power data analysis, and can be used for power distribution. The cabinet provides the basis for analyzing the operation status and power consumption of the equipment. The power distribution system project of the intelligent power distribution cabinet is based on the user's demand for the on-line power distribution cabinet incoming line, feeder line, outlet circuit equipment and power consumption monitoring. TPC1062K and Ankerui intelligent instrument PZ72L-E4/KC, PZ80L-E4/KC and motor protector ARD2F-100A/CKQ realize three-phase operation during the operation of the incoming, feeder and outlet circuit of the intelligent power distribution cabinet. Real-time monitoring display of voltage, current, active power, reactive power, apparent power, and energy data, data saving and export functions, real-time display of the on/off state of the loop, and overload, unbalance, underload, and grounding of the motor equipment If the fault is alarmed and recorded, it can ensure the normal operation of the intelligent power distribution cabinet and the incoming line of the power distribution cabinet. Line, real-time monitoring outgoing circuit management.




2 User requirements

Through monitoring and management of the power distribution cabinet, understanding the operation status and power consumption of the equipment, the following requirements are put forward for the designed power monitoring system:

real-time display:

Incoming cabinet: Real-time data acquisition of PZ80L-E4/KC voltage, current, power and electric energy of the intelligent instrument PZ80L-E4/KC through the touch screen, which visually shows the load power consumption of the main power inlet cabinet;

Feeder cabinet: It mainly collects the voltage, current, power and energy parameters of the feeder cabinet loop, which is convenient for the user to know the power consumption status of the external power supply in real time;

Outlet cabinet: Collect the AC current, voltage, power and other parameters of the single loop of the cabinet through the PZ72L-E4/KC AC instrument, and use the motor protector ARD2F to monitor and protect the data of the outlet loop motor;

Curve analysis: real-time display of current (or power) real-time curve trend graph of each electrical cabinet;

Event alarm: realize the over-limit alarm of parameters such as voltage, current, power, frequency and power factor of the incoming line cabinet, feeder line cabinet and outlet cabinet;

Power management: complete the power parameter set copy function of each meter of the circuit, you can query the calendar hardware business network information center) http://news.chinawj.com.cn