Power quality monitoringdeviceAlso known as harmonic power monitoring device, it is a high-performance multifunctional power quality testing and analysis instrument. Mainly solves the rapid increase in power load, especially the continuous growth of impulsive and nonlinear load capacity, which leads to waveform distortion, voltage fluctuation and flicker, and three-phase imbalance in the power grid.

Suitable for power plants, substations, wind farms, photovoltaic power stations, oil, coal mines, steel, metallurgy, chemical and other large-scale factories and mining enterprises with voltage levels of 220KV, 110KV, 35KV, 10KV, 6KV, and 380V. Power quality mainly includes the quality of voltage, frequency, and waveform. The online monitoring equipment for power quality mainly measures voltage deviation, voltage fluctuation and flicker, frequency deviation, harmonics, voltage asymmetry, imbalance, etc.

Monitoring the reliability of power supply is also one of the important tasks. Power supply reliability refers to the ability of a power supply system to continuously supply electricity, which is an important indicator for assessing the quality of power supply system energy. It reflects the degree to which the power industry meets the national economic energy demand and has become one of the standards for measuring a country's economic development level.The reliability of power supply can be measured by a series of indicators: power supply reliability rate, average user outage time, average user outage frequency, and equivalent system outage hours.

At present, the reliability rate of power supply in general urban areas in China has reached over 3 9s (99.9%), and the average annual power outage time for users does not exceed 8.76 hours; The number of major urban centers has reached over 99.99%, with an average annual power outage time of no more than 53 minutes for users.The voltage input adopts a high voltage isolation module, and the current input adopts a high-precision current transformer, which isolates the input signal from the measurement system and greatly improves the anti-interference ability of the instrument.

Used to detect system 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, fundamental apparent power, 2-63 harmonics, true power factor, and other parameters specified in all five national standards for power quality.Meet the requirements of national standard A-level instruments. Reference algorithms are used for harmonics, three-phase imbalance, flicker, and fluctuations, without approximate calculations. High precision A/D (16 bit) is used for simultaneous sampling, with a collection rate of 12.8 kHz.

The communication interface supports RS-232 and 485, and the power quality monitoring device has multiple testing channels, flexible configuration, and can measure 8-way 3-phase voltage signals and 8-way 3-phase current signals.Built in 512M memory, data is stored in units of 5 minutes, and each channel can continuously store 4 months of historical data.