Power quality is the focus of power enterprises. The deterioration of power quality first affects the safety and reliability of power generation and power supply equipment, and then affects the normal operation of user precision equipment. It is imperative to monitor and manage power quality online.

Power quality analysis according to the basic data provided, according to the characteristics of massive data, the system has the function of online fast calculation, realizing the statistics and analysis of various power quality indicators such as power grid frequency, power grid voltage, power supply voltage, power transmission and transformation reliability, user power supply reliability, etc. According to different power quality evaluation models, the evaluation system is established to realize the automatic generation of power quality analysis report. At the same time, in order to meet the needs of business sharing and data fusion, the system has the interface function of unified release.

From the current situation, power companies at all levels have completed the coverage of regional power quality monitoring devices, and built a power quality management system to meet the requirements of business management. At present, power quality on-line monitoring system is mainly oriented to frequency, voltage and reliability, Power quality management needs to include harmonic, flicker, unbalance, voltage interruption and other steady-state indicators and transient indicators into the management scope. At the same time, considering the future business development, the system needs to support automatic access from different system related statistical indicators.

With the increase of nonlinear load and impact load in power grid, the problem of power quality is becoming increasingly prominent. In order to ensure the safe and economic operation of power grid and electrical equipment, it is necessary to quantitatively analyze the harmonic source and its pollution degree of power grid, and realize the online monitoring of harmonic, flicker, imbalance and other indicators. It is necessary to use the power quality on-line monitoring device for harmonic analysis, flicker measurement, power measurement, imbalance measurement and fault recording, recording each event, recording steady-state data and transient data, deeply mining the cause of each event, quickly collecting and accurately analyzing various power parameters, and monitoring and evaluating various indicators of power quality.