Power quality monitoringdeviceWe adopt a high-performance multi-core platform and embedded operating system, and measure various power quality indicators according to the measurement methods specified in IEC61000-4-30 "Testing and Measurement Techniques - Power Quality Measurement Methods". We integrate functions such as harmonic analysis, waveform sampling, voltage sag/sag/interruption, flicker monitoring, voltage imbalance monitoring, event recording, and measurement control.

The device meets the IEC61000-4-30 A-level standards in terms of standardization of measurement methods for power quality index parameters, measurement accuracy of index parameters, clock synchronization, event marking functions, and other aspects. It can meet the requirements of power quality monitoring for 110kV and below power supply systems and is widely applicable to power quality monitoring in industries such as chemical, steel, metallurgy, hospitals, data centers, transportation and construction.

Adopting a dual ARM core processor based on Xilinx SoC architecture, ARM1 is used for data sampling and power quality data calculation. ARM2 runs embedded Linux, TCP/IP protocol, HTTP protocol, web server, storage, statistics, and analysis of power quality data. The device samples up to 1024 points per cycle, with high measurement accuracy and accurate recording of fault waveforms.

Adopting an eMMC high-speed storage chip with a capacity of 32GB, it can store event records and fault waveforms for a long time.Equipped with a friendly human-machine interface, 800 * 480 pixel dot matrix color large-sized LCD, capable of on-site viewing of real-time waveforms and fault waveforms, facilitating user fault analysis.

The device's software and hardware have continuously improved self checking functions and good anti-interference performance. The device has passed multiple electromagnetic compatibility testing certifications, and the electrical fast transient pulse group, electrostatic discharge, and surge anti-interference performance all meet national standards.This series of devices not only have regular monitoring of steady-state indicators of power quality, but also monitor and record transient disturbances and impacts of power quality, which has strong practicality.

The device provides multiple communication interface methods to achieve real-time transmission of monitoring data or timed extraction and storage records. It can communicate with the remote power quality management center through industrial Ethernet interface, or communicate with the remote through RS232/RS485 interface via modem or GPRS. The device supports Modbus TCP/RTU communication protocol and IEC 61850 MMS protocol.