Background introduction
As the number of distribution terminals grows rapidly, the amount of data required to be transmitted is increasing. In addition, the expansion of the power distribution management system function will also increase the amount of data transmitted by the terminal to the system master station. Distribution network data services mainly include energy billing data services, user meter reading data services, electricity marketing data services, distribution network scheduling data services, etc. Distribution network information can be divided into two categories: one is around distribution The various information of the network device, and the other type is various information surrounding the user. From the perspective of network tiering, the power distribution network automation system can be divided into three levels: the on-site service acquisition layer, the reliable data transmission layer, and the back-end service processing and network management layer.
An Introduction
Power Distribution Network/Marketing Automation System Solution (EPON/McWiLL) DT EPON Transmission System Solution
The EPON system consists of an Optical Line Terminal (OLT), an Optical Network Unit (ONU), and an Optical Distribution Network (ODN). In this solution, 110kV becomes the convergence point, and one end OLT device is placed at each power return line of 110KV, and one end ONU device is placed at each switch station. The PON interface of the OLT reaches the ONU through the passive optical splitter. According to the geographical distribution pattern of each switch station, combined with the electrical wiring structure of the 10kV power line outlet, each ONU connects the OLTs from two different return lines through the dual PON interfaces, and Simultaneously "register" on the two OLTs to form a "hand in hand" network structure with dual access.
DT McWiLL wireless access, transmission system solution
In the access stations where some optical cables cannot reach, the wireless transmission method is used to realize the distribution monitoring, and the remote meter reading and distribution transformers are monitored, protected, controlled, measured, and managed in the normal and accident situations. Together, it achieves the best economical power supply and enterprise management is more effective. In order to improve the reliability and quality of power supply, the distribution Transformer monitoring system will gradually increase the coverage of distribution transformers, especially the distribution transformers above 100KVA will be included in the monitoring of the distribution transformer monitoring system, and the daily work scheduling business will be gradually transferred to The way to get it wirelessly.
Power Smart Meter Reading Solution
The smart energy meter (fiber optic) solution actually embeds the ONU as a built-in module into the smart energy meter, thus enabling intelligent collection of the meter.
Program characteristics
The meter realizes the power supply to the embedded ONU module, and truly realizes the bare-edge optical network (the device power supply problem is no longer needed); the system failure point is greatly reduced;
End-to-end network management solution.
Optical fiber sensing temperature measurement system
Datang Telecom is aiming at the phenomenon of heat generation at the junction of electrical equipment. It uses optical fiber sensing technology to actively monitor the temperature changes of the nodes online, and to detect hidden dangers earlier and minimize losses. At the same time, the staff can be freed from heavy inspections, and a large amount of online monitoring data is provided to provide a reliable basis for users to fully understand and evaluate the use of electrical equipment, and to guide future maintenance work.
Fiber optic sensor temperature measurement system features
High insulation, anti-electromagnetic interference, corrosion resistance and long service life;
Real-time monitoring in 24 hours, truly unattended around the clock;
The system can set the alarm temperature arbitrarily, or set the temperature rise rate abnormal alarm;
The wavelength information of the sampled light is not affected by factors such as undulation of the light source, bending loss of the fiber, connection loss, and aging of the detector;
Draw real-time and historical curves of temperature at each point; easy to install and maintain.
Datang McWiLL Product Introduction
Datang Telecom's McWiLL multi-carrier wireless broadband access system uses advanced code-expanded orthogonal frequency division multiple (CS-OFDMA), smart antenna, space null, joint detection and other wireless communication technologies, making its wireless performance far higher. Broadband wireless communication (BWA) technology, including WiFi, microwave and WiMAX technology; McWiLL based on IP packet switching network and softswitch core network architecture, can be seamlessly integrated into the operator's NGN network.
The McWiLL system has complete independent intellectual property rights, and all equipment is not affected by import quotas in domestic production, and the security and confidentiality are good. In addition, the McWiLL system provides carrier-grade reliability (99.999%), high transmission rate, and large user capacity, which can meet the rapidly growing capacity requirements of the number of monitoring terminals in the future. The coverage radius is large (single base station coverage radius can reach tens of kilometers) and supports large-scale networking. McWiLL adopts TDD duplex mode, so it can adjust the uplink and downlink bandwidth according to needs. The maximum uplink bandwidth can reach 13Mbps, which better meets the requirements of power load management and power distribution monitoring. The upstream data stream is larger than the downlink data stream.
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