County Power Enterprise Research and Application of Distribution Automation

Abstract: Power resources strained situation of China's indisputable. The current power industry in many parts of the country have lagged behind the development of local economic development, which not only fail to meet the current needs of China's rapid economic development, but also greatly disrupted the normal life of the people . to gradually reverse this situation, in addition to other efforts to increase energy development, but also to gradually improve the quality of electricity services and supply reliability. the traditional structure and distribution network operation and management methods were not suited to the new situation needs. Distribution Automation Management System came into being. the system in different regions have different operational logic, this article will focus on power Distribution Automation in the county to explore the application of the enterprise.

Keywords:: county-level power supply companies, Distribution Automation
First, the content Distribution Automation
Power Distribution Automation application Technology in recent years in response to tensions and other power energy to the new Technology. It is mainly involved in low-voltage power grid, the role of the object is operating electric power companies.

Distribution automation is not simple and the corresponding distribution line equipment, it also includes communications, computer integrated applications, electric power (load) control, energy, power grid and so the statute. Summed up in the following aspects:
1. Safe and reliable electricity supply network: including power point should be to ensure economic operation of power transmission lines, switches, transformers and other facilities for reliability.

2. Automatic fault detection and isolation: the manual or automatic conditions, resume the supply of non-fault line of self-isolation and fault diagnosis.

3. To determine the operational status of the system for real-time monitoring: the information required on the distribution network for processing, on all kinds of information sent downstream, timely response to operational status and incident handling analysis.

4. Power management: including the user of the power management requirements, management advice, they have a timely response to the distribution centers, and by the distribution management center to react and deal with.

Second, the distribution automation meaning of enterprise applications at the county level
China's electric power distribution automation on the optimal use of energy, relieve the supply pressure, and better provision of electricity services are all of great significance. Enterprises in county-level power distribution automation, the meaning of the following:
1. Help improve the county-level power management level, but also an effective way to improve their economic efficiency. Automated mode of operation, through the distribution network monitoring, switching operation can effectively reduce the workload and improve the overall labor productivity and safety.

2. Is conducive to improve supply capacity, open up the electricity market. The implementation of distribution automation, to correctly determine the fault location, automatic fault isolation, automatic restoration of electricity, the failure to reduce the losses to a minimum, greatly improving the power grid safety and reliability and increase the efficiency of handling the accident so as to enhance supply capacity, consumers won praise.

3. Will help improve quality of power supply. The implementation of distribution automation, reduced energy consumption and supply risks, improve reliability, help improve the quality of power supply.

Third, the distribution automation system, the design principles and functional requirements
(A Main Station Design
1. Design: the main station system design should adhere to the hierarchical and modular.

The software hierarchy is divided into two levels: the base platform layer and the application module level, making the function to expand and modify the function module only additions and modifications without changing the basic platform as the core layer, thereby improving system reliability and scalability .

Modular refers to the system as much as possible in the basic platform for modular by function, so function can be easily added, modified and streamlined to suit the scale of investment.

Links to Research Papers Download http://www.hi138.com 2. Network design: network design into hardware and software.

Hardware should be designed as dual-network balance, and models of triage each other to increase the bandwidth and reliability of communication.

Software designed for C / S mode and B / S mode. Where a running management and maintenance of all workstations using C / S mode, you can authorize various types of control operations and modify the database, where a query only to browse the whole nature of the workstations used B / S mode, the workstation using only IE browser, can access various types of distribution automation data and pictures, but not modified. This will not only reduce the power distribution network automation system, the burden of the main station, and also enhance the master system data security, to maximize the network coverage of the master system.

3. In addition, the master system should allow the interface with other automation systems to achieve information sharing, elimination of all automated information silos.

(B sub-station terminal design
Terminal stations require the use of industrial grade hardware, chips, especially the column FTU, to meet the industrial temperature requirements and low power requirements. Because the FTU to take into account outdoor seal, can not have ventilation openings. Besides anti-jamming design is also very important, especially in FTU, switch on the column next to it, and hung on the poles, the most vulnerable to outside interference, requiring the input of the power supply, the signal input and output circuits to take anti-interference measures, such as static shielding surge suppression , burst suppression and other methods. software also has a corresponding anti-jamming algorithm.

(C communication design
System uses GPRS wireless communication, to solve the wireless communication equipment is expensive, unreliable and shortcomings, to provide two-way reliable real-time channel. With the remote terminal equipment, to realize the power distribution network any device operating conditions of the monitoring. At the same time, GPRS communications with Move the existing wireless network for transmission, no additional laying communication lines, to reduce the construction costs, and cover the wide wide operating costs low, to adapt to the complex real situation.

1. Communication content: the action, including remote control switch (remote control, such as closing, tripping, etc., the working status of the remote query switch (remote, such as a power forward / no electricity supply left / right power supply, etc. query the current time operating parameters (telemetry, such as the switch setting value, alarm, statistics and so on.

2. Communication: Real-time mode can be set based on the user's real-time upload, the minimum interval of 1s, real strong, but the traffic flow, high running costs. Intelligent upload mode, the user can set a fixed interval Upload , polling the controller's cycle, when the controller or remote signals generated SoE modification, the communication card to automatically upload issues, all the communication parameters can be remotely modified.

IV Conclusion
China's rapid economic development and a huge consumer groups, making China's electricity supply and services in a longer period of time will face serious challenges. Distribution automation applications, as a new Technology, with broad prospects. From county in terms of distribution automation, it can improve the power quality and service quality, reduce risk reduction, with good social and economic benefits, will have greater development and application of space. but we should also strive to improve understanding of the distribution automation, innovation, the development of distribution automation technologies to a new height, to better serve the community and the people.

References:
[1] Mrs, Ni Jianli, Deng Yonghui. Distribution automation system [M]. China Water Power Press, 2006.

[2] Fengqing Dong, Mao people. Distribution network automation Technology and engineering case study [M]. China Electric Power Press, 2007.

[3] Chen Tong, Zhao Zukang, Chen Xing Ying, Hu Daliang. Distribution System and Automation Technology [M]. China Electric Power Press, 2006. Links http://www.hi138.com Research Papers Download