Power quality monitoringdeviceIt is a long-term installation and operation on the testing site, transmitting data in real-time, so it is called "online". Capable of measuring voltage, current, power, harmonics, and flicker. Simple waveform viewing and analysis, data storage, and voltage are generally within 1000V. The current is measured based on the current sensor.

Power quality analyzerIt is an industry measurement tool that records and analyzes power quality issues in the power grid. It can capture common power quality issues such as harmonics, voltage fluctuations, flicker, power, and three-phase imbalance at fault sites, and provide functional evaluation and management decisions on power quality for smart grids, new energy, electrified railways, and large industrial users.

The sampling power analyzer can reach several megabytes, and the power quality analyzer is generally within 1M. Power quality monitoring is a device that uses power quality standards as limits and records power quality events through machine triggered limits. Power quality monitoring is not limited to standards and can only be tested within a bandwidth range.The quality of AC power supplied to the user through the public power grid.

Simply put, it refers to the quality of electrical energy in the power grid line. Power quality issues are mainly caused by the terminal load side. For example, impulsive reactive loads can cause severe fluctuations in the voltage of the power grid, reducing the quality of power supply. The number of rectifiers, variable frequency speed control equipment, electric arc furnaces, electrified railways, and various power electronic equipment used in the distribution network of various user terminals in the power grid system is constantly increasing.

Harmonics can cause parallel resonance or series resonance in some parts of the power system, expanding the harmonic content and causing equipment such as capacitors to burn out. The non-linear, impulsive, and unbalanced electricity consumption characteristics of these loads pose a serious pollution to the quality of power supply. Therefore, eliminating the problem of high-order harmonics in the power supply and distribution system has a very active meaning for improving power quality monitoring and ensuring stable and economic operation of the power system.