Introduction:
With the continuous enlargement of the power system, the demand of users for power is increasing day by day. Various unbalanced loads are widely used in the power system. The various power quality problems caused have caused the power sector and power users to attach great importance to it. At home and abroad, the construction of an on-line power quality network monitoring system was successively carried out, and a special monitoring system for the provincial or regional power quality monitoring center was built.
Among these special monitoring systems, the use of wired transmission communication networks occupies a very important position in modern power quality monitoring systems, but this method still has the following deficiencies:
1. Remote substations that are geographically remote and that have not undergone communications transformation have not yet achieved wired communications;
2. The wired network terminal equipment takes up more resources and has a longer recovery time.
3. For steel, metallurgy and chemical industries, special optical fiber networks have high laying costs, long implementation cycles, and large maintenance workloads.
China has entered the 3G era of third-generation mobile communications. 3G technology provides a new solution to solve the above problems with its broad signal coverage, stable channel guarantee, and mature technology applications.
case analysis:
Zhiyuan Electronics E8000 series power quality on-line monitoring device is based on 3G technology and virtual private network VPN wireless monitoring scheme. It transmits the data from each monitoring point to the PQS sub-station system. The monitoring center personnel can remotely view and manage the power quality system through the web. Remote users can log in through the VPN connection to perform functions such as data viewing, uploading, and management, and can perfectly implement wireless monitoring and management of the power quality system. The power quality monitoring communication network architecture based on 3G technology is as follows:
The power quality monitoring system includes three components: monitoring terminal, communication network and monitoring center. The communication network is responsible for transmitting measurement data from each monitoring terminal to the monitoring center, and monitoring commands from the monitoring center to each monitoring terminal. The power quality monitoring center serves as the main station of the communication network and stores the user name and password required for establishing the connection of the monitoring terminal 3G wireless router, and performs VPN dial-in authentication for the access terminal. The communication server collects the measurement data of the power quality monitoring terminal in two ways: the MMS real-time communication transmission service based on the IEC 61850 protocol and the PQDIF file transmission method based on the protocol. The former is used for real-time online monitoring, and the latter is used to transmit historical data generated by the terminal.
The database server of the power quality monitoring center is used to store real-time and historical measurement data of power quality and various indexes obtained through analysis and statistics, so that the monitoring center client can comprehensively analyze the data collected by terminals accessing the 3G wireless network. Clients and mobile users can remotely log in via the Web to view and manage the power quality information system.
data analysis:
The power quality data stored in the main station database server can be analyzed in many aspects through PQS data analysis software. The main functions include real-time data browsing, comprehensive statistical report export, alarm data query and historical data query, etc. Several aspects of the analysis ultimately assessed the power quality of the substations where 3G wireless connected terminal equipment is located.
to sum up:
The power quality monitoring system realized through virtual private network VPN technology and 3G wireless technology, combined with Zhiyuan Electronics E8000 series power quality monitoring device and PQS substation system, can quickly build a low-cost, safe and convenient power quality detection system.
With the continuous enlargement of the power system, the demand of users for power is increasing day by day. Various unbalanced loads are widely used in the power system. The various power quality problems caused have caused the power sector and power users to attach great importance to it. At home and abroad, the construction of an on-line power quality network monitoring system was successively carried out, and a special monitoring system for the provincial or regional power quality monitoring center was built.
Among these special monitoring systems, the use of wired transmission communication networks occupies a very important position in modern power quality monitoring systems, but this method still has the following deficiencies:
1. Remote substations that are geographically remote and that have not undergone communications transformation have not yet achieved wired communications;
2. The wired network terminal equipment takes up more resources and has a longer recovery time.
3. For steel, metallurgy and chemical industries, special optical fiber networks have high laying costs, long implementation cycles, and large maintenance workloads.
China has entered the 3G era of third-generation mobile communications. 3G technology provides a new solution to solve the above problems with its broad signal coverage, stable channel guarantee, and mature technology applications.
case analysis:
Zhiyuan Electronics E8000 series power quality on-line monitoring device is based on 3G technology and virtual private network VPN wireless monitoring scheme. It transmits the data from each monitoring point to the PQS sub-station system. The monitoring center personnel can remotely view and manage the power quality system through the web. Remote users can log in through the VPN connection to perform functions such as data viewing, uploading, and management, and can perfectly implement wireless monitoring and management of the power quality system. The power quality monitoring communication network architecture based on 3G technology is as follows:
The database server of the power quality monitoring center is used to store real-time and historical measurement data of power quality and various indexes obtained through analysis and statistics, so that the monitoring center client can comprehensively analyze the data collected by terminals accessing the 3G wireless network. Clients and mobile users can remotely log in via the Web to view and manage the power quality information system.
data analysis:
The power quality data stored in the main station database server can be analyzed in many aspects through PQS data analysis software. The main functions include real-time data browsing, comprehensive statistical report export, alarm data query and historical data query, etc. Several aspects of the analysis ultimately assessed the power quality of the substations where 3G wireless connected terminal equipment is located.
The power quality monitoring system realized through virtual private network VPN technology and 3G wireless technology, combined with Zhiyuan Electronics E8000 series power quality monitoring device and PQS substation system, can quickly build a low-cost, safe and convenient power quality detection system.
Creative cats and dogs, large, medium and small dogs, all kinds of warm clothing in autumn and winter size and color and materials customized to customer needs
Creative cat and dog warm clothing in autumn and winter
Shenzhen Ananda Technology Co.,LTD , https://www.carmitek.com