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With the rapid development of the power industry, the information construction of the power industry has become more and more important; especially in severe weather such as snow disasters, earthquakes and other disasters, timely understand the working conditions of power equipment to ensure the safety, stability and reliability of power facilities The work has become an urgent need in the power industry. In order to solve the 18-kilometer wireless transmission between Changchun Baojia UHV Substation and Jilin Jilin Electric Group Connected together through wireless Mesh links.
Mesh system helps smart grid online monitoring
The construction of a wireless monitoring system requires the use of advanced wireless network technology, which requires easy installation, high reliability, and high security. Advanced Mesh technology is the direction of wireless network development. The Strix wireless Mesh network adopts a “mesh”-like network structure, which can be expanded freely, and the installation is very flexible and convenient. Strix wireless Mesh network is an intelligent network. The network itself can be automatically networked, automatic fault isolation, automatic network optimization, and has high reliability and stability. The wireless Mesh base station uses a modular, multi-frequency, multi-channel, and multi-RF approach to demonstrate advanced backhaul methods. According to the on-site environment, each power pole is installed with a base station to achieve better on-site image acquisition and remote monitoring, and The good multi-hop performance of the Strix wireless Mesh network extends the monitoring range and reduces the number of fiber points. At present, the speed of wireless network technology is very fast. After the project is completed, it is very important to ensure that the wireless network system built is not outdated and how to smoothly upgrade the technology following the development of technology. This is the advantage of the advanced Strix Mesh modular design. Long-term and smooth technology upgrades can be achieved through simple replacement of functional modules, which is difficult for other wireless network products to achieve.
The complete set of wireless IP phone solutions for Strix Mesh wireless network products, including wireless video surveillance, emergency communication command and other fields have complete and mature application cases. This project uses Strix Mesh wireless networking solutions to achieve wireless network coverage, and provide broadband wireless access for fixed monitoring, mobile monitoring, emergency temporary monitoring and VOIP voice services.
According to the design of video monitoring points for each power pole, the base station spacing is 500 meters. The fixed base station adopts OWS2400-20 four-mode wireless Mesh product. The communication distance between any two base stations can reach up to 40 kilometers (depending on the specific surveillance camera). The density and the accessibility of the on-site environment are different.) Base stations are usually erected every 1-2 kilometers along the power line, as shown in the following figure:
The system backbone connection of the fixed base station adopts the wireless interconnection in the 5.8GHz frequency band, and cooperates with the high-gain directional antenna; it saves the cost of fiber erection or lease to the greatest extent. While video transmission, the wireless system also supports data transmission and voice function applications. Generally speaking, when deploying a wireless network over a large area, a traditional bridge will encounter the problem of long-distance limitation. The base station at the edge of the network cannot be connected nearby and must intervene with the central base station in the wireless network. Wireless network construction and future network expansion bring many restrictions.
The Strix Mesh topology introduces the concept of a mesh network, which does not require a so-called central point-any two wireless nodes can be connected, and for each wireless node, there are one or more wireless links to choose from. The characteristics of the Mesh wireless mesh network easily solve the point-to-multipoint topology limitation problem. Using the characteristics of Mesh topology, blocking problems encountered in large-scale wireless networks can be easily circumvented. However, Mesh topology will introduce more wireless hops in the wireless network (hop, each wireless device is called a hop); if the throughput loss caused by each hop is too large (such as single-radio Mesh single-radio mesh) Adding more than 50% throughput loss per network hop will inevitably require more optical fiber and other wired backhaul lines, which will lead to a soaring overall project cost. Strix Mesh uses the unique multi-radio Mesh (multi-radio mesh) technology, which greatly reduces the throughput loss per hop. In a laboratory environment, the loss per hop is less than 1%; in practical applications, each hop loss is less than 1%; Jump loss can reach less than 10%.
Therefore, in this solution, the bandwidth loss between the equipment of the 10-terminal fixed base station is extremely small, and the throughput of at least 10 Mbps can be provided in the end-to-end network from beginning to end.
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