Online monitoring device for power quality

1、 Overview

APView350Online monitoring device for power qualityAdopting 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 meets the national standard A requirements in terms of standardization of power quality index parameter measurement methods, measurement accuracy of index parameters, clock synchronization, event alarm functions, and other aspects, and can meet the power quality monitoring of new energy generation systems such as 10kV and below photovoltaic/energy storage/wind power.

2、 Function Comparison Table

Monitoring of steady-state data such as voltage deviation, frequency deviation, 2-63rd harmonic voltage/current, 0.2-62.5 harmonic voltage/current, voltage flicker, voltage fluctuation, DC component, etc; Voltage interruption, voltage transient rise, and voltage transient drop monitoring; Current transient and voltage transient monitoring. IEC61850 communication protocol

The main menu has six submenus, including 'Real time Data', 'Power Quality', 'Event Recording', 'User Settings',' System Settings', and 'Device Debugging'. When a submenu is selected, a blue selection box will appear and be highlighted. At the same time, the sub menu content of that submenu will be displayed in the 'Menu Navigation' bar on the right. At this point, press the confirm button again to enter the submenu.

Select the 'Real time Data' menu from the main menu to enter the real-time data interface. The real-time data menu mainly includes six submenus: 'voltage and current', 'real-time waveform', 'vector diagram', 'power metering', 'energy metering', and 'input status'.

The real-time waveform interface mainly displays the waveform of the current sampling value. Press the left and right keys to select the operation area; Press the up and down keys to select the displayed channel. Yellow, green, and red represent the A, B, and C phases respectively, while blue represents the zero sequence; Press the '+' and '-' keys to move the waveform cursor.

Select from the main menu'power quality'The menu enters the power quality interface. The power quality submenu mainly includes'Harmonic measurement'、'Harmonic power'、'Interharmonic measurement'、'Harmonic electric energy'、'fluctuation/flicker'、'unbalanced/bias'Six submenus.

3、 Technical parameters

4、 Size and appearance

This device is an embedded installation method, which can be centrally installed on the control room screen or cabinet, or dispersed and installed on the switchgear.

Four, Online monitoring device for power qualityRelated testing reports

5、 The difference between Class A and Class B online monitoring devices

1. Application scenarios
A-class online monitoring devices are mainly used in places with high requirements for power quality, such as large industrial parks, data centers, hospitals, schools, etc. The electricity load of these places is relatively important, and any power quality issues may cause significant economic losses or social impacts. B-class online monitoring devices are applied in places with relatively low requirements for power quality, such as residential areas, commercial centers, etc.

2. Technical parameters
A-class online monitoring devices require higher technical parameters. For example, its voltage and current measurement range is wider, which can cover more electrical equipment and scenarios. At the same time, the measurement accuracy of Class A online monitoring devices is also higher, which can more accurately reflect the actual operating status of the power system. In addition, Class A online monitoring devices usually have more advanced data processing and storage functions, which can conduct in-depth analysis and storage of collected data, facilitating subsequent data mining and fault diagnosis.

3. Communication Protocol
A-class online monitoring devices typically use internationally recognized communication protocols, such as IEC61850, to achieve interconnectivity with other smart devices and build a smart grid. However, Class B online monitoring devices may use older communication protocols or only support simple communication protocols, making it difficult to achieve interconnectivity with smart devices.

4. Scalability
Due to the higher technical parameters of Class A online monitoring devices, their scalability is relatively good. In the future, with the continuous development of technology, Class A online monitoring devices can better adapt to new power quality standards and requirements. However, Class B online monitoring devices have relatively poor scalability due to their low technical parameters, making it difficult to adapt to new power quality standards and requirements.