Power quality monitoringdeviceBasic introduction:

1Characteristics of the device:adoptDSP+ARM9As the core,DSPHas extremely strong data processing capabilities, used to complete data collection and calculation, and the core hardware is at the domestic level. Used for data statistics, display, storage, buttons, communication, and alarm tripping functions. adoptThe embedded real-time operating system serves as a software platform, and all software is programmed using language, ensuring high reliability and portability of the system. The data collection part adopts6Channel, synchronous samplingsixteenBit High SpeedA/DThe converter has high collection accuracy, and the actual measurement accuracy meets the requirements of national standards for power quality testing indicators; Large capacity storage space meets the requirements for data storage, and can store historical data for more than one year without losing power.

2. Adopting hardware phase-locked loop technology and automatic frequency tracking, it prevents the impact of frequency changes on testing indicators in the power system and prevents frequency "leakage". Powerful communication interface, equipped with industrial Ethernet, with a communication speed of up to100Mbps, also equipped withRS232C、RS485、USBCommunication interface, with multiple communication methods available for exchanging data with remote management centers; The core hardware adopts a four layer printed circuit boardProcess andSMTThe process, hardware reliability, and electromagnetic compatibility capabilities have reached the domestic level, meeting the national standard for power quality monitoring devicesEMCRequirements.Power quality monitoring deviceIn terms of testing functions, in addition to monitoring conventional steady-state indicators of power quality, transient disturbances of power quality, mainly voltage surges and dips, are also tested and recorded, which has strong practicality.

3Basic test indicators: grid frequency, three-phase fundamental voltage, effective value of current, fundamental active power, reactive power, power factor, phase, etc; Voltage deviation, frequency deviation, three-phase voltage imbalance, three-phase current imbalance, negative sequence voltage, current; harmonicIncluding the total harmonic distortion rate of voltage and current, the content of each harmonic, amplitude, and phase.Power quality monitoring deviceTest indicators: inter harmonic, voltage fluctuation, flicker, voltage surge, drop, short-term interruption, temporary overvoltage, transient overvoltage.