Power quality monitoring equipment mainly includes the quality of voltage, frequency and waveform. The power quality online monitoring device mainly measures voltage deviation, voltage fluctuation and flicker, frequency deviation, harmonics and voltage asymmetry, unbalance, etc.
Monitoring the reliability of power supply is also an important task. Power supply reliability refers to the ability of the power supply system to continue supplying power. It is an important indicator for evaluating the power quality of the power supply system. It reflects the degree to which the power industry meets the power demand of the national economy and has become a standard for measuring the economic development of a country. Power supply reliability can be measured by a series of indicators as follows: power supply reliability rate, average user outage time, average user outage times, system outage equivalent hours; my country's power supply reliability rate currently reaches 3 9 (ie 99.9%) in general urban areas ) Above, the average annual power outage time for users does not exceed 8.76 hours; the key urban central areas have reached more than 4 9s (ie 99.99%), and the average annual power outage time for users does not exceed 53 minutes.