The urban heating industry is an important part of the city's thermal supply and it is one of the important infrastructures for urban construction. The development of urban thermal power is of great significance in saving energy, protecting the environment, facilitating people’s livelihood, promoting industrial production, and developing urban public utilities. It is one of the important symbols of realizing urban modernization.
Data collection and transmission
It can collect all technical data of all heat exchange stations (including water-water stations and gas-water stations) of the company in real time, including various basic data such as pressure, temperature, flow, heat, water and electricity consumption, and pump status, through company-specific virtual telephones. The network transmits the data of each substation to the central dispatch office. The company dispatcher can learn about the various operating parameters of each heat exchange station in the dispatch office.
Automatic control of heat exchange station: Each heat exchange station can timely control the temperature of the supply and return water of the secondary pipe network by adjusting the opening of the electric valve of the primary pipe network according to the change of outdoor air temperature. Through the control curve given by the dispatcher, each exchange The hot station can operate independently, ensuring that the operating parameters always operate within the given range. At the same time, dispatching in the central dispatching room can intervene in the operation of the substations at any time as needed, and dispatching electric valves that can remotely control the substations to adjust the operating parameters.
After the heating network is put into operation automatically, the temperature of the supply and return water of the secondary pipe network of the heat exchange station always runs within the specified range. At the same time, the automatic operation of the heating network can quickly follow the change of outdoor temperature. When the outdoor temperature changes greatly, The temperature of the water supply and return water in the grade pipe network also changes along with it, ensuring that the indoor temperature of the heating users is always balanced, avoiding the hysteresis of the heating network temperature, greatly improving the quality of the heating service, and reducing the heating during the day when the outdoor temperature is high. Quantity, this can save a lot of heat and electricity, reducing the operating costs of the heating network. Since the dispatcher has a means to control the heat network, the operational parameters of the heat network can be adjusted at any time. During the holidays, heating operation parameters can be artificially increased to ensure the indoor temperature of the user.
Project Overview
This design proposal targets the program requirements for the central heating system of the Dalian Development Zone, according to geographic location requirements, and thermal control of the optical fiber network requirements. The network topology must have features such as real-time acquisition, long-distance, high-bandwidth network transmission, and redundant backup. In combination with the actual situation of the network, it was decided to set up a fiber optic network and use fiber cabling products. The requirements of the plan must not only fully meet the needs of the district heating station detection network, but also coordinate with the communication application network. Therefore, we choose professional industrial-grade network communication equipment to provide industrial-grade reliability and achieve long-term, trouble-free continuous operation. Only the functions specifically designed for industrial equipment management can completely monitor the status and network operation of industrial equipment. Prevent possible accidents before they happen.
Network design
According to the requirements of the specific environment of this project, the plan decided to use industrial-grade redundant ring network switches to form a redundant optical fiber ring network structure. The ring network equipment uses the WISE series of industrial Ethernet switches from Zhengwei Technology, distributed in 32 nodes. Thirty-two WISE 2200-2S industrial Ethernet switches are connected in a ring topology with fiber links. This structure takes full advantage of the advantages of the industrial redundant ring network structure. When the communication link fails, the recovery time of its network transmission is controlled. Within 300 milliseconds, if a common civilian Ethernet switch is used to construct a link redundancy network, the recovery time is as long as about 1 minute. Obviously, the uninterrupted data transmission requirements cannot be met. This is also WISE Industrial Ethernet Switch and Civil Ethernet. Compared with the switch has a clear advantage. In addition, this ring topology facilitates project expansion and maintenance with high safety performance. Network monitoring software is used to monitor the network controller in real-time on the network and organically coordinate with the thermal SCADA system to ensure that they do not affect each other.
This program has the following characteristics:
1. Link automatic redundancy backup In the thermal control redundant ring network, we use WISE2200-2S switch, which can automatically backup redundancy, can automatically negotiate the path to the nearest node, if a line is damaged, the network topology is reconfigured to achieve The normal network state only needs 300 milliseconds, and it supports the industrial environment voltage 18-36VDC.
2. Longer transmission distance
The ring structure adopts the optical fiber medium type and has low loss in transmission, which makes the transmission distance of the transmission line longer, and the maximum length between adjacent stations can reach 5KM, and the single-mode optical fiber can reach 40-. 80KM, the maximum coverage is 120KM.
3. Has a large bandwidth
The transmission bandwidth of the ring network is 100Mbps, and new multi-data processing technology is adopted at the same time, so that the network can maintain high bandwidth under heavy load conditions.
4. High reliability
The ring structure can still be self-reconfigured in the event of a network failure, ensuring the system is safe and reliable. At the same time, the transmission optical fiber has the ability to suppress electromagnetic and radio frequency interference, and is not affected by electromagnetic and radio frequency noise during transmission, and does not affect the equipment. Because the optical fiber transmits optical signals, the power supplies at both ends are relatively isolated, which effectively solves the serious threat that the power and ground cables at both ends of the optical fiber may cause to the device.
5. Good safety
When the optical fiber communicates, the light beam is transmitted inside the fiber, and does not generate any form of radiation. It can prevent tapping during the transmission process, and eliminates the eavesdropping of radiated waves. Therefore, it is the most secure communication medium.
The system was put into operation for a year. After our investigation on users, the communication system was stable. Users were very satisfied with the reliability and safety performance of the WISE 2200-2S series of industrial Ethernet equipment. Focused on the industrial automation communication field, is committed to providing the necessary results for the optimization of industrial automation customers.
Today, more and more industrial devices around the world use the Ethernet+TCP/IP protocol as their communication and control standard. However, industrial automation systems require that their network communications equipment have higher reliability and security than civilian network communications equipment (eg, civilian switches). It is required to connect different plant network sections and important automation equipment with high reliability requirements. However, the general civilian network communication equipment does not take into consideration the high demand for stability and reliability of the equipment in the design and manufacture of industrial networks. It is only applicable to office equipment such as computers connected to the office or air-conditioning environment and cannot adapt to the industrial field environment. (such as high temperature, low temperature, dust, strong electromagnetic interference, vibration, impact, etc.) and industrial automation requirements for the reliability and safety of communication equipment (auto recovery of link faults, automatic fault alarms, redundant power supplies, etc.). Therefore, for the reliability and security of your industrial automation network communication system, we recommend the use of industrial-grade Ethernet communication equipment in industrial Ethernet networks.
Data collection and transmission
It can collect all technical data of all heat exchange stations (including water-water stations and gas-water stations) of the company in real time, including various basic data such as pressure, temperature, flow, heat, water and electricity consumption, and pump status, through company-specific virtual telephones. The network transmits the data of each substation to the central dispatch office. The company dispatcher can learn about the various operating parameters of each heat exchange station in the dispatch office.
Automatic control of heat exchange station: Each heat exchange station can timely control the temperature of the supply and return water of the secondary pipe network by adjusting the opening of the electric valve of the primary pipe network according to the change of outdoor air temperature. Through the control curve given by the dispatcher, each exchange The hot station can operate independently, ensuring that the operating parameters always operate within the given range. At the same time, dispatching in the central dispatching room can intervene in the operation of the substations at any time as needed, and dispatching electric valves that can remotely control the substations to adjust the operating parameters.
After the heating network is put into operation automatically, the temperature of the supply and return water of the secondary pipe network of the heat exchange station always runs within the specified range. At the same time, the automatic operation of the heating network can quickly follow the change of outdoor temperature. When the outdoor temperature changes greatly, The temperature of the water supply and return water in the grade pipe network also changes along with it, ensuring that the indoor temperature of the heating users is always balanced, avoiding the hysteresis of the heating network temperature, greatly improving the quality of the heating service, and reducing the heating during the day when the outdoor temperature is high. Quantity, this can save a lot of heat and electricity, reducing the operating costs of the heating network. Since the dispatcher has a means to control the heat network, the operational parameters of the heat network can be adjusted at any time. During the holidays, heating operation parameters can be artificially increased to ensure the indoor temperature of the user.
Project Overview
This design proposal targets the program requirements for the central heating system of the Dalian Development Zone, according to geographic location requirements, and thermal control of the optical fiber network requirements. The network topology must have features such as real-time acquisition, long-distance, high-bandwidth network transmission, and redundant backup. In combination with the actual situation of the network, it was decided to set up a fiber optic network and use fiber cabling products. The requirements of the plan must not only fully meet the needs of the district heating station detection network, but also coordinate with the communication application network. Therefore, we choose professional industrial-grade network communication equipment to provide industrial-grade reliability and achieve long-term, trouble-free continuous operation. Only the functions specifically designed for industrial equipment management can completely monitor the status and network operation of industrial equipment. Prevent possible accidents before they happen.
Network design
According to the requirements of the specific environment of this project, the plan decided to use industrial-grade redundant ring network switches to form a redundant optical fiber ring network structure. The ring network equipment uses the WISE series of industrial Ethernet switches from Zhengwei Technology, distributed in 32 nodes. Thirty-two WISE 2200-2S industrial Ethernet switches are connected in a ring topology with fiber links. This structure takes full advantage of the advantages of the industrial redundant ring network structure. When the communication link fails, the recovery time of its network transmission is controlled. Within 300 milliseconds, if a common civilian Ethernet switch is used to construct a link redundancy network, the recovery time is as long as about 1 minute. Obviously, the uninterrupted data transmission requirements cannot be met. This is also WISE Industrial Ethernet Switch and Civil Ethernet. Compared with the switch has a clear advantage. In addition, this ring topology facilitates project expansion and maintenance with high safety performance. Network monitoring software is used to monitor the network controller in real-time on the network and organically coordinate with the thermal SCADA system to ensure that they do not affect each other.
This program has the following characteristics:
1. Link automatic redundancy backup In the thermal control redundant ring network, we use WISE2200-2S switch, which can automatically backup redundancy, can automatically negotiate the path to the nearest node, if a line is damaged, the network topology is reconfigured to achieve The normal network state only needs 300 milliseconds, and it supports the industrial environment voltage 18-36VDC.
2. Longer transmission distance
The ring structure adopts the optical fiber medium type and has low loss in transmission, which makes the transmission distance of the transmission line longer, and the maximum length between adjacent stations can reach 5KM, and the single-mode optical fiber can reach 40-. 80KM, the maximum coverage is 120KM.
3. Has a large bandwidth
The transmission bandwidth of the ring network is 100Mbps, and new multi-data processing technology is adopted at the same time, so that the network can maintain high bandwidth under heavy load conditions.
4. High reliability
The ring structure can still be self-reconfigured in the event of a network failure, ensuring the system is safe and reliable. At the same time, the transmission optical fiber has the ability to suppress electromagnetic and radio frequency interference, and is not affected by electromagnetic and radio frequency noise during transmission, and does not affect the equipment. Because the optical fiber transmits optical signals, the power supplies at both ends are relatively isolated, which effectively solves the serious threat that the power and ground cables at both ends of the optical fiber may cause to the device.
5. Good safety
When the optical fiber communicates, the light beam is transmitted inside the fiber, and does not generate any form of radiation. It can prevent tapping during the transmission process, and eliminates the eavesdropping of radiated waves. Therefore, it is the most secure communication medium.
The system was put into operation for a year. After our investigation on users, the communication system was stable. Users were very satisfied with the reliability and safety performance of the WISE 2200-2S series of industrial Ethernet equipment. Focused on the industrial automation communication field, is committed to providing the necessary results for the optimization of industrial automation customers.
Today, more and more industrial devices around the world use the Ethernet+TCP/IP protocol as their communication and control standard. However, industrial automation systems require that their network communications equipment have higher reliability and security than civilian network communications equipment (eg, civilian switches). It is required to connect different plant network sections and important automation equipment with high reliability requirements. However, the general civilian network communication equipment does not take into consideration the high demand for stability and reliability of the equipment in the design and manufacture of industrial networks. It is only applicable to office equipment such as computers connected to the office or air-conditioning environment and cannot adapt to the industrial field environment. (such as high temperature, low temperature, dust, strong electromagnetic interference, vibration, impact, etc.) and industrial automation requirements for the reliability and safety of communication equipment (auto recovery of link faults, automatic fault alarms, redundant power supplies, etc.). Therefore, for the reliability and security of your industrial automation network communication system, we recommend the use of industrial-grade Ethernet communication equipment in industrial Ethernet networks.