Solutions of Houshi Industrial Switches in Wind Power

Wind power refers to the conversion of the kinetic energy of the wind into electrical energy. Wind power can be divided into onshore wind power and offshore wind power according to different installation areas. Wind is a pollution-free energy source. Using wind power to generate electricity is very environmentally friendly and can generate huge electrical energy. Therefore, more and more countries pay more attention to wind power generation.

Looking back at the development of domestic wind power in the past ten years, we find that the newly installed capacity has three distinct stages.

The first stage (2006-2011) The budding period of the wind power industry: From the promulgation of the Renewable Energy Law in 2006 to the first negative growth in 2011, we think it is the budding period of the wind power industry. In the first four years of this stage, Chinese newly installed wind power capacity basically doubled every year, and the compound annual growth rate of newly installed wind power capacity in the four years from 2006 to 2009 reached an astonishing 128%. Subsequently, due to the high wind curtailment phenomenon in 2011, the newly installed capacity of wind power began to decline.

The second stage (2012-2016) the stable growth period of the wind power industry: After the curtailment of wind power and curtailment in 2013 was significantly improved, Chinese wind power installed capacity has ushered in a relatively rapid growth, because in 2016 there was the first decline in wind power subsidies ——The electricity price was lowered by 0.02 yuan, and the wind power industry ushered in the first rush to install in 2015. Since then, in 2016, under the dual influence of the subsidy decline and the high wind curtailment rate, the newly installed wind power capacity began to decline for the second time.

The third stage (2017-2021) of the rapid growth of the wind power industry: During 2016 and 2017, a number of UHV lines in my country were put into operation, and the implementation of the policy to ensure the utilization of hours in 2016 finally completely reversed the phenomenon of large-scale wind abandonment. Wind power installed capacity has ushered in rapid growth. Especially in the last year of wind power tariff subsidies in 2020, Chinese newly installed wind power grid-connected capacity reached 72GW, a record high.

With the large-scale construction of wind farms, wind farm information management systems and wind turbine remote monitoring systems are also widely used.These systems have harsh application environments and require managed wide temperature industrial switches for network support.Recently, a large-scale wind turbine manufacturer in China chose Houshi industrial switch as the backbone network switch of its wind farm management system.

The demand for industrial switches in the wind power sector

1. The application environment of wind power is harsh, the temperature difference between day and night is large, and the sandstorm is serious. The required working temperature: -45～75℃, storage temperature: -45～85℃, storage humidity: 0[%]～95[%], no condensation.

2. The electromagnetic environment of the motor control system is harsh, and the industrial switch is required to have a strong anti-electromagnetic interference capability and a longer mean time between failures.

3. In order to ensure the reliability of communication, industrial switches are required to establish a redundant ring network with a small self-healing time. When the communication network fails, it can smoothly switch to the redundant backup line.

4. In order to ensure the security of remote monitoring data, industrial switches need to have comprehensive network security settings.

Analysis of Industrial Switch Solutions

As the wind power industry has both its universality and its particularity, we mainly consider the following aspects in the networking scheme:

1. The system design fully considers the system characteristics of multiple business subsystems, and technically follows the principle of equal emphasis on advanced nature, practicability and mature reliability, and forms a complete set of networking solutions with complete functions.

2. Can meet the harsh physical environment of wind farms, temperature, dustproof, electromagnetic compatibility and other requirements

3. Due to the large scale of the network, the networking scheme adopts a clear multi-layer structure, which simplifies the maintenance and management of the network from the most fundamental network structure design, realizes the rapid separation and clarification of fault points, and ensures the stable operation of the system.

4. The networking scheme itself must have certain troubleshooting and fast self-healing functions, which can self-diagnose and quickly eliminate equipment failures and link failures, and alarm in real time.

5. When performing manual maintenance, expansion, or fault repair on the network, the impact should be minimized, so that maintenance and expansion have no impact on system operation; fault repair only has a certain impact on the connection terminals of related network equipment.

6. Select industrial-grade equipment with high real-time performance and stability for network equipment

7. The networking solution must have compatibility, be able to seamlessly connect network equipment from different manufacturers, and be cost-effective.

Taking into account the real-time requirements of the industrial environment, the ring network design concept is adopted to avoid the impact of a single link failure on the network.

Advantages of Industrial Switches

Industrial switches have the following superior features:

1. Fast redundancy

Hoshi's industrial switch products can form a fast redundant network, and use the original X-Ring protocol to build a reliable industrial network for you, with an ultra-fast self-healing time of less than 10 milliseconds. Commercial switch products can also form a redundant network, but the STP protocol needs to be activated, so that the redundant time will reach 10~30 seconds or more, so it cannot be used in an industrial environment.

2. Strong anti-interference - suitable for harsh environments

Houshi industrial switch products can work in harsh electromagnetic environments, and have high protection levels in data port lightning protection, rapid burst, static electricity, etc., which are not available in commercial products.

3. Good temperature characteristics & flexibility of installation methods

Good temperature characteristics, Houshi's network management series industrial switches are designed for wide temperature. Working temperature: -45 ~ 75℃ Storage temperature: -45 ~ 85℃, to meet the stable demand in harsh weather environment. The installation method is more flexible. Industrial products can support various methods such as rail installation, panel installation, stack installation and cabinet installation.

4. Advantages of power supply & installation method

The power supply part is the root cause of any product, and all products fail, and the power failure rate accounts for more than 35%. Therefore, in order to avoid the trouble caused by power failure, industrial products generally choose the mode of dual power supply. And use DC power supply. Commercial products generally use AC single power supply.

5. Security advantages

Houshi's industrial switches take the following measures to ensure the safety of industrial networks

(1) VLAN (Virtual Local Area Network) technology

VLANs are an essential feature of security switches. VLANs may span one or more switches, regardless of their physical location, and devices communicate as if they were on the same network. VLAN can realize the isolation of broadcast domain on the switch, it can divide the network into an independent area, and can control whether these areas can communicate.

(2) IP/MAC and port binding

Set the binding function of IP/MAC address and port, which can limit the user's unauthorized network access.

(3) Traffic control function

The flow control of industrial switches can prevent the abnormal load of the switch bandwidth caused by the excessive data flow of broadcast packets, multicast packets and unicast packets due to wrong destination addresses, and can improve the overall efficiency of the system and maintain network security and stability. run. In addition, the HouShi's industrial switch can also provide bidirectional (in/out) limit function for each port.

(4) ACL (Access Control List) technology

The HouShi's industrial switch adopts the access control list ACL to realize the security function of the packet filtering firewall and enhance the security protection capability. Access control filtering measures can be implemented based on source/destination IP, TCP/UDP port, etc. ACL can not only be used by network administrators to formulate network policies, allow or deny control for individual users or specific data flows, but also be used to strengthen network security shielding, thereby ensuring network security to a greater extent.

(5) IEEE802.1x authentication mechanism

The LAN access control protocol of the IEEE 802 protocol suite is a port-based access control protocol. It can provide a means of authenticating and authorizing users connected to the local area network on the basis of utilizing the advantages of the IEEE 802 local area network, and achieves the purpose of accepting access by legitimate users, rejecting access by unauthorized users, and protecting network security.

(6) QoS mechanism

The HouShi's industrial switch adopts the IEEE802.p QoS CoS/TOS/DSCP priority strategy to ensure the real-time and reliable transmission of key data.

(7) SysLog (system log)

The Syslog log function of the industrial switch can transmit information such as system errors, system configuration, status changes, and periodic status reports to the log server. Based on this information, network administrators can grasp the operating status of the equipment, find problems early, and perform configuration settings and troubleshooting in a timely manner. , to ensure the safe and stable operation of the network.