Solution of Industrial Switch in Video Monitoring System of Hydropower Station

Hydropower station is a power station that uses the kinetic energy of strong water flow generated by water level difference to generate electricity. It is called "hydropower station" for short. It consists of various hydraulic structures, as well as mechanical and electrical equipment for power generation, transformation, distribution, etc., forming an organic complex, which works together and cooperates with each other. In the hydropower station, the video monitoring system, which is networked by Industrial Switches, is an indispensable link. Its main responsibility is to assist in safe production, monitor the operation status of various equipment in the hydropower station, so as to reduce the labor volume and labor intensity of on-site personnel, timely find various dangerous situations, and prevent accidents.

However, the video monitoring system of hydropower station generally operates under the environmental conditions of low temperature, humidity, heavy wind and dust, and strong electromagnetic field interference. Moreover, hydropower station has the characteristics of wide geographical distribution, many operating equipment, etc., which requires a high level of video monitoring system. It is very important to establish a video monitoring system that can operate reliably and stably for a long time, transmit clear images remotely and operate conveniently.

System requirements of video surveillance for industrial switches in hydropower stations

1. The self-healing redundancy protection function, how to establish a reliable and uninterrupted communication network, has become a challenge we must face. In recent years, with the rapid development of industrial Ethernet, network redundancy technology has been widely used in power automation system. The masterless architecture of ring network redundancy algorithm and its self-healing time are less than 20ms, which ensure the reliability of the network.

2. Optical fiber data transmission is adopted to meet the requirements for integrated networking of various types of terminals on site;

3. The industrial switch should adapt to the harsh EMC/EMI environment;

4. Industrial switch should adopt industrial design scheme to meet the requirements of stable and reliable operation under strong electromagnetic interference;

5. High security of industrial switch system to ensure the security of field data

6. Industrial switch products should adopt low power consumption power supply scheme to meet the power supply requirements of special scenarios;

7. Industrial switches need to have strong scalability to meet the expansion of the system. Therefore, the industrial switch needs to adopt a modular design, so that users can choose the transmission medium flexibly, and it is conducive to the future upgrade and expansion.

8. Provide convenient network management and diagnosis functions, and assist operators in remote fault analysis and location of network systems and business systems.

In response to the above requirements, the solution of our Industrial switch in the monitoring system of hydropower station adopts a 3-layer architecture, which is respectively the data acquisition layer, the network transmission layer and the central monitoring layer. This scheme uses private ring to realize front-end equipment redundancy, and uses aggregation layer switch port aggregation to realize link redundancy of uplink power station control layer. The core machine room is composed of rack mounted industrial switches, which gather multiple ring network data flows and transmit them upstream to the core layer 3 switch. Each data acquisition point is composed of multiple clamping rail type ring network switches. Each ring network improves the security of the network through physical isolation. The ring network switch enables the fast ring network redundancy protocol to ensure rapid network failover. The VLAN virtual LAN function of the switch is enabled in the ring network to isolate the hydropower station webcam, PC, PLC and other services, and prevent broadcast storms from affecting other services, And enable the broadcast storm suppression function of each service access port of the switch, which can realize the function of "effective data transmission and invalid data isolation" in the network, and improve the security of network data transmission.

At the same time, the QoS function is used to allocate the bandwidth of the access port of the industrial switch according to different service levels. The central monitoring system divides VLANs of multiple different gateways through a layer 3 switch. If one of the gateways fails between different LANs, the normal use of other gateways will not be affected.

After the whole network is built, first ping the switch, network video camera, PC and other devices from primary to secondary according to the topology structure, and bind them to a specific port through the MAC address and IP address of the device. After the binding is completed, set a specific corresponding IP address for the bound device or port. If you need to add and change devices in the network, first apply to the network management center. After obtaining permission, you will need to add the MAC address record of the device and assign a corresponding IP address to improve security. Finally, the industrial switch equipment in the network selects disable for the port that is not applicable, and turns off the port function.

As a professional manufacturer of industrial switch equipment, we have provided an expert level solution for hydropower stations: advanced industrial Ethernet communication technology is used to achieve effective monitoring of hydropower stations, ensuring the safety, reliability and stability of the entire system, and improving the efficiency of hydropower generation. Standard communication protocols also facilitate access to other businesses.