0.4kV new energy grid connected power quality monitoring device

The potential power quality issues that may be encountered during the production process mainly include the following aspects:

(1) Voltage fluctuations and flicker:

High power equipment and process lead to rapid changes in power load, which in turn impact the power grid and cause voltage fluctuations. The current harmonics generated by power electronic equipment such as intermediate frequency furnaces and direct current furnaces interfere with the normal operation of the power grid, exacerbating voltage fluctuations and flicker. The inherent characteristics of power grid capacity, impedance distribution, and reactive power compensation also affect voltage stability. In addition, external factors such as weather, operating conditions of other equipment, and changes in grid load can also affect voltage stability.

(2) Harmonic pollution:

In the production process, there are multiple stages involved, such as feeding, melting, necking growth, shoulder laying growth, equal diameter growth, and tail growth. These stages usually require the use of various power electronic equipment, such as intermediate frequency furnaces, DC furnaces, high-power switching power supplies, etc. These power electronic devices commonly use semiconductor controllable rectification during operation, which generates a large amount of current harmonics. These harmonics not only cause pollution to the power grid and reduce power quality, but may also interfere with production equipment and even damage it.

(3) Frequency deviation:

The frequency deviation of the power system can have an impact on the production process. For example, the speed of an electric motor varies with frequency, which may affect the normal operation of the equipment and the stability of product quality.

The APView350 power quality online monitoring device adopts a high-performance multi-core platform and embedded operating system. According to the measurement methods for various power quality indicators specified in IEC 61000-4-30 "Testing and Measurement Techniques - Methods for Measuring Power Quality", the measurement integrates functions such as harmonic analysis, waveform sampling, voltage sag/sag/interruption, flicker monitoring, voltage imbalance monitoring, demand, time-sharing measurement, event recording, and measurement control. The device has met the national standard requirements in terms of standardization of measurement methods for power quality index parameters, measurement accuracy of index parameters, clock synchronization, event alarm functions, etc. It can meet the power quality monitoring of new energy generation systems such as photovoltaic/energy storage/wind power of 10kV and below.

1、 Application scenario diagram

2、 Functional Features

Meets IEC61000-4-30 power quality monitoring and 1024 point high-precision sampling

Support steady-state and transient monitoring

Temporary source localization and tolerance curve analysis

Demand and multi rate electricity

Electric pulse output

fault recording

Daily statistics, compliance assessment and level assessment of power quality

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3、 Installation diagram

0.4kV new energy grid connected power quality monitoring device

0.4kV new energy grid connected power quality monitoring device