Power quality monitoringdevicePurpose and characteristics:

1. Main purpose:Measurement and analysis of the AC power quality supplied by the public power grid to the user end, including frequency deviation, voltage deviation, voltage fluctuation and flicker, allowable three-phase voltage imbalance, and grid harmonics;Applying wavelet transform to measure and analyze the harmonics of non-stationary time-varying signals;Measure and analyze the impact of various electrical equipment on the power quality of the public power grid under different operating conditions;Load fluctuation monitoring: Regularly record and store the trend of changes in power parameters such as voltage, current, active power, reactive power, frequency, phase, etc.

2Dynamic monitoring of power equipment adjustment and operation process, helping users solve problems that arise during the adjustment and operation of power equipment;Test and analyze the causes of faults such as circuit breaker action, transformer overheating, motor burning, and automatic device malfunction in the power system;Test and analyze the dynamic parameters of reactive power compensation and filtering devices in the power system, and quantitatively evaluate their functions and technical indicators;The characteristics of online, multi parameter, large capacity, high accuracy, and the application of modern signal analysis theory make power quality monitoring devices widely applicable in fields such as transmission and distribution, power electronics, and motor drive.

3. Main features:reliable：The voltage input adopts a high-voltage isolation module，The current input adopts a high-precision current transformer to isolate the input signal from the measurement system, greatly improvingGHDZ-300AIts anti-interference ability;Power quality monitoring deviceEasy to use，Adopting a Chinese interface and simple button operation, making it easy for users to use;High precision：Conforming to national standardsALevel instrument requirements. Reference algorithms are used for harmonics, three-phase imbalance, flicker, and fluctuations, without approximate calculations and with high accuracyA/D（sixteen Bit), simultaneous sampling, collection rate12.8 kHz。

4Strong software functionality：adoptDSP+ARM+CPLD Kernel, fast processing speed, rich software features, enablingGHDZ-300ASuitable for complex testing and data processing work, greatly improving testing efficiency and level;Mass storage：Built in power quality tester512M Memory to5Store data in minutes, with each channel capable of continuous storage4Historical data for months.

5Multiple testing parameters：Power quality monitoring deviceSystem frequency, grid harmonics, three-phase voltage imbalance, voltage fluctuation and flicker, voltage deviation, fundamental effective value and true effective value of voltage, fundamental effective value and true effective value of current, fundamental active power, active power, fundamental apparent power2-50The parameters specified in the five major national standards for power quality, such as subharmonics and true power factor.