Industrial Switch Solution In Photovoltaic Power Generation Monitoring System

Photovoltaic power generation system is a power generation system that uses the principle of photovoltaic effect to convert solar energy into electric energy. Its main components are solar photovoltaic arrays, combiner boxes, DC cabinets, inverters and box transformers. It is characterized by high reliability, long service life, no pollution to the environment, independent power generation and grid connected operation. It is a clean and pollution-free environmental energy, favored by enterprises and organizations in many countries, and has broad prospects for development.

With the construction and use of photovoltaic power stations in China, the domestic photovoltaic industry has developed rapidly. The power plant owner needs to know the operation of the power plant in real time. Therefore, it is urgent to establish a complete monitoring system.

There are many types of monitoring equipment involved in the photovoltaic power station, including photovoltaic string, day patrol device, conflux device, inverter, and environmental detector related to the photovoltaic system; Security devices (monitoring probes, lightning arresters, alarm devices, etc.), collection devices (metering instruments related to electricity/voltage/power quality), protection devices (high-voltage switches, DC grounding), etc. The inverter control system is an important part of controlling photovoltaic power generation, which can control a series of systems such as startup control, current and voltage reading of each combiner box, power generation data reading, active power, reactive power, reactive feedback, box transformer FU fusing, circuit breaker status, high temperature tripping, oil level alarm, operating room door, load switch opening, temperature alarm, pressure abnormality, smoke control signal, etc, In order to ensure the stability and controllability of photovoltaic power generation.

However, the environment of photovoltaic power station is very harsh, which requires that the performance of Industrial Switch transmission equipment of photovoltaic power generation monitoring system is quite reliable. System requirements: communication equipment has low transmission delay and high reliable transmission guarantee; Support Vlan/QoS and other data processing functions to ensure priority transmission of monitoring and control data; Support ACL access control, and the network management system supports SNMP v1/v2c/v3; Protection against dust, humidity, salt fog and vibration, and adaptability to high temperature; Provide convenient network management and diagnosis functions, and assist operators in remote fault analysis and location of network systems and business systems.

In addition, some equipment in the photovoltaic power station will produce a strong electromagnetic field, which puts forward high requirements on the electromagnetic compatibility of industrial switches. If the electromagnetic compatibility is not good, the data communication will be abnormal or even unable to communicate.

Based on the above requirements, the solution of our Industrial Network Switch in the monitoring system of photovoltaic power station adopts a three-tier 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 to the communication management machine for protocol conversion and analysis. Each outdoor room is composed of multiple clamping rail mounted 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 power SCADA, environment detector, inverter DC distribution cabinet, combiner box, video and other services to 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, adopt the Qos quality of service function to allocate the bandwidth of the access port of the switch according to different service levels.

Solution features of our industrial switch in photovoltaic power generation monitoring system

Industrial chip scheme: industrial switch adopts industrial chip scheme, which can meet the needs of large bandwidth and high code stream of network high-definition video transmission.

Complete security protection mechanism: supports MAC+IP+VLAN+port binding, ARP, DOS protection, 802.1x authentication, DHCP Snooping and other features.

Multiple networking modes: support star, tree and ring networking modes, fast ring networking, and ring self-healing time less than 20ms.

Switch redundancy technology: dual power supply safety redundancy, ring network double link safety redundancy.

Industrial application environment: - 40 ℃~85 ℃ high and low temperature working adaptability.

Industrial hardware design standards, meeting IP40 and EMC Class IV standards;

High isolation and high protection: 6KV lightning protection and 8KV anti-static.

Working for extra long time: 7 × 24-hour uninterrupted full load operation without jamming

MTBF MTBF up to 300000 hours

Rich network management: support port management, QoS, multicast, STP, RSTP, MSTP and static routing, CLI, SNMP network management methods, and PoE control Web management functions to meet the management requirements of high security and intelligence.

Our industrial switches can meet the harsh industrial environment of photovoltaic power stations. As an innovative enterprise specializing in the research and development of industrial network switches, our industrial switch products have passed the CE certification, FCC certification and CCC certification, as well as the national grid inspection report and the network access license for telecommunications equipment. In addition, we have accumulated a lot of successful experience and the latest technical product solutions in the industry in the application of industrial Internet systems, including photovoltaic power generation monitoring systems. We always adhere to the quality policy of "quality assurance, good service, and customer satisfaction", and provide customers with perfect technical support and thoughtful solutions.