1Power quality monitoring仪Measurement and analysis of the AC power quality supplied by the public power grid to the user end, including frequency deviation, voltage deviation, 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 power quality of various electrical equipment in the public power grid under different operating conditions.

2. Load fluctuation monitoring: Regularly record and store the trend of changes in power parameters such as voltage, current, active power, reactive power, apparent power, frequency, phase, etc. Dynamic 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.

3. 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 portable, multi-parameter, large capacity, high-precision, and modern signal analysis theory of the power quality monitoring instrument make WD-PQ1100 widely applicable in fields such as power transmission and distribution, power electronics, and motor drive.

With the widespread application of power electronics technology and impact loads such as electric arc furnaces, as well as the increasing number of driving loads such as electric locomotives. For the power industry, maintaining power quality that meets user requirements has become increasingly difficult. The widespread application of power electronics technology not only brings a series of convenience and benefits in technology and economy, but also significantly increases the content of harmonics in the power grid.

The increasingly serious harmonic pollution in the power grid has led to a shortened lifespan of electrical equipment, increased network losses, and increased the possibility of resonance in the power grid. This has led to the inability of relay protection and automatic devices to function or operate normally, resulting in a series of serious consequences such as inaccurate instrument indications and electrical measurement, as well as interference with computers and communication. High power impact loads such as electric arc furnaces not only cause serious harmonic pollution, but also are important reasons for voltage fluctuations and flicker.