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The Requirement of Intelligent Grid Development on Regional Power Grid Dispatching Mode and the Coun

In the traditional power grid structure, data processing form and scheduling mode of the power grid, with the continuous advancement of the smart grid, there are new contradictions and challenges. This paper puts forward the planning idea of the development of the grid division, and summarizes the data processing capability of the scheduling platform The measures and methods are given, and the measures and suggestions of improving the self - management capacity of the power grid are given.

Background and meaning

With the concept of smart grid and the deepening of the reform of the power system, the traditional grid scheduling operation is facing great challenges, such as: due to grid safety and stability and other requirements, the current variable distribution network mostly layered It is clear that there is a need for coordination between the traditional centralized dispatching mode and the current regional grid structure and operation mode. Under the strong support of the continuous development of hardware and software technology such as computer and communication, Complexity and scheduling automation requirements of the increasingly improved, the operation of the grid scheduling data in the massive need for effective management. How to combine the construction of smart grid, to achieve the local data distributed management and highly centralized unified platform management seamlessly, for improving the power grid scheduling and operation and management efficiency is significant.

The development model of grid structure suitable for stratified district

The stratified partition operation of the power grid is obviously the only way to develop the power grid. Reasonable hierarchical partition will bring many benefits to the safe operation of the power grid, not only can effectively reduce the short circuit current, but also conducive to the dispatcher in any case can be more convenient. Therefore, the hierarchical operation of the grid should not be considered due to short-circuit capacity limit forced to move, but the development of power grid in one of the strategic initiatives.

With the development of modern management and the construction of smart grid, the importance of dispatching automation system is becoming more and more obvious. It is the necessary means to realize the operation and management of power grid and realize the safety and multi-supply and reduce the efficiency. The hierarchical partition control and management of the grid can improve the stability of the grid control center and improve the reliability of the system operation. At the same time due to the flexibility of hierarchical management planning, can better adapt to the development of the power grid and management system changes.

Regional grid hierarchical development model of the planning ideas for:

(1) zoning planning. Based on the substation layout, administrative area, the main geographical features as the conditions, the planning area of the power supply zoning, according to the district load characteristics, the status of the network and other differences in the planning, the subordinate to maintain a certain percentage of contact

(2) hierarchical planning. With the deepening of the development of regional power grid, the scale of medium voltage distribution network will rapidly expand, standardize the network wiring, optimize the network structure, to ensure the reliability of the premise of simplifying the structure of medium voltage distribution network, the formation of high, Clear network structure.

The regional power grid planning based on the hierarchical partitioning principle refers to the concept of partitioning and partitioning from the beginning of load forecasting. The regional power grid is divided into several relatively independent partitions according to local conditions, and the power distribution and capacity of different voltage levels Of the optimal adjustment, so that the load distribution tends to balance. So that the regional power grid has a relatively clear, basically stable power supply range. On the basis of this, the grid grid in each district is designed, and finally the partition grid is connected with each other to form a reliable grid structure.

Reasonable stratification, district power grid structure is to build a safe and can withstand a variety of disasters, "strong grid" basis, therefore, the regional power grid construction with strong disaster performance of the grid, the hierarchical planning should meet the following points:

(1) adhere to the scientific power supply, power grid planning and design. Optimize the consideration of the power point in the various voltage levels of the hierarchical access, reasonable layout, to ensure that all levels of power grid in the normal and accident conditions are available power. Attaches great importance to the safety and flexibility of the layout of the grid structure, decentralized external power supply, partition operation, mutual reserve, improve its ability to fight natural disasters.

(2) to adapt to the smart grid in the context of regional power grid construction, should pay attention to the development of micro-grid and determine the power grid planning and design of the dominant ideology. The development of smart grid with self-healing function, including intelligent transmission network and intelligent distribution network, is the inevitable result of the development of the world's energy and environment. The integration of distributed power grid into the distribution network is the core of intelligent power grid, the distribution network will be transformed into active distribution network and micro-grid will greatly improve the reliability of electricity users to improve disaster resistance. In the development of micro-network at the same time, the low-voltage power grid in each partition should have the appropriate distributed power supply as a support power.

Which is helpful to improve data processing efficiency and consideration

According to the characteristics of the distributed data processing platform with the smart grid continues to improve, the grid will have a faster acquisition rate of the acquisition device, which will power dispatch automation secondary system brings great changes and challenges. On the one hand, the huge amount of data on a system of data collection has brought great pressure, the need to develop large amounts of information, high-speed digital real-time communication and processing technology. On the other hand, a large number of dispatch automation systems collect and accumulate a lot of information about power system operation, production management, and power market operations. But the computer accumulated a large number of data, a direct impact on the system for the effective use of data and efficient processing. Therefore, the measures and methods to improve the data processing capability of dispatching platform are as follows:

(1) grid technology

The concept of grid technology is to share resources and solve problems in virtual organizations that are dynamically formed by multiple organizations, and are essentially shared and collaborative. Grid technology in the field of power dispatching automation applications can be called "power grid." Power grid has a strong distributed processing and information integration capabilities. Therefore, the power grid helps to exchange data between different regional dispatching centers, solve the coexistence of multiple data formats between the massive data of the power system, construct the data grid and the information grid, turn the data into information, , To accurately grasp the entire power system to create real-time dynamic conditions. The grid has the ability to integrate the existing data and resources of the power system and provides distributed high-performance computing capabilities. The grid technology provides a great deal of integration capabilities for the various resources on the network to be applied to the power system for different scheduling systems Information and resources to share the convenience, and can support the entire power system data sharing, monitoring, analysis and simulation and simulation platform. The use of grid technology to achieve information sharing, integration, improve the efficiency of massive data processing efficiency is based on the original data stored in the format and location.

(2) data warehouse and data mining

Data warehousing and data mining can dig out a lot of data from the hidden knowledge, and data storage technology into a higher stage. Not only the use of the data warehouse storage function, the historical data query and traversal, and through data mining to find out the potential relationship between historical data, mining behind it hidden a lot of information. Real-time data and historical data as important information on the operation of the grid, need to be shared in the operating sector. The current data transmission makes the data flow between departments is more complex, if faced with massive data, it is difficult to ensure data consistency and uniqueness. Therefore, the public data collation, statistics, the establishment of power grid data warehouse, application data mining technology to achieve data consistency and sharing, reduce the network burden.

(3) multi-data source scheduling information fusion technology

There are multiple data sources in the system, and the system data model of the integrated data platform is different and most of the data may be redundant. In the system integration, the redundant data needs to be merged and preprocessed. Through the pretreatment operation, in order to ensure the legitimacy and validity of the data. For the data integration and application process can be from the data source, data cleaning, data storage, data expression, data application of five processes. In the establishment of the data source to pool the data of each module, and data analysis work for the data storage to prepare. In addition to redundant information processing, the preprocessing operation needs to estimate and infer the information of the missing network, as well as the analysis and processing of the bad data, and the state estimation of the grid dispatching information.

Research on Regional Power Grid Dispatching Mode to Improve the Self - management Ability of Power Grid

China's scheduling system technology and equipment has been ranked the international advanced level. However, with the gradual construction of strong smart grid, distributed / energy storage power of large-scale access, the system will make the operating environment more complex, to ensure the importance of system operation is more prominent. Intelligent dispatching mechanism similar to the central nervous system of the power grid, the role of scheduling and status is more prominent, scheduling and power grid business links will be further strengthened, the timely response to the accident and processing capacity also requires further improvement, to improve the scheduling control technology and enhance Scheduling management level put forward higher requirements. From the technical and management of two areas to strengthen the regional power grid self-management capacity of the scheduling model measures and recommendations:

(1) technical aspects

1, data transmission network. It is a reliable data communication guarantee for the safe and stable operation of the regional power grid, which can realize the fast and reliable transmission of the operation information and production management information and the emergency backup of the system through the special dispatching data network.

2, running surveillance panorama. It is the ability to realize the comprehensive monitoring, data sharing and multi-angle visualization of the operation of the grid from the time, space, business and other levels and multiple dimensions to realize the panoramic monitoring, intelligent alarm, Scheduling to a comprehensive, fast, accurate and intuitive to grasp the operation of the power grid.

3, dynamic assessment of security. It is an active safety defense which can realize the online safety automatic alarm, auxiliary decision and multi-dimensional multi-layer coordination through the steady-state, dynamic and transient multi-angle online safety analysis and evaluation.

4, scheduling decision-making fine. It can prevent and control the leanness, intelligence and operation risk of dispatching decision by focusing on the core business of the year, monthly maintenance, and real-time planning and security checking.

5, run control automation. It can adjust and control the power grid frequency, voltage, power flow and reserve automatically on the basis of the unified coordination and optimization of the control strategy of AVC, disassembly, low frequency and low voltage, and so on, so as to realize the coordinated control of regional grid integration.

(2) management aspects

1, to promote professional operation and maintenance. Smart grid environment, the power of a secondary equipment, a high degree of integration and integration of the traditional one, the second device interface fuzzy, to further promote the operation and maintenance of specialized equipment, adhere to the whole life cycle management concept of overall planning, design, Construction, operation and other aspects of management.

2, improve the professional information platform. As a technical support platform to support the smart grid, the communication information platform needs to strengthen the investment and management in the communication system and information platform, improve the reliability and stability of the communication information system and the ability to resist all kinds of natural disasters. Improve the data transmission capacity of the communication network, meet the transmission requirements of the massive data of the smart grid, improve the integration utilization rate and the coordination ability of the information resources, and fully integrate the production control, the enterprise management, the marketing and the market as well as the real-time and non-real- The company's internal horizontal information and vertical and horizontal power company vertical information interoperability to improve the depth of application and practical degree.

3, a sound marketing management system. Optimize the integrated marketing business and customer service resources, deepen and improve the standardization of marketing business organization model construction. Establish an intensive marketing management model and a new standardized marketing business organization model to meet the development requirements of the new situation, and improve the market responsiveness, customer service ability, management control ability and marketing operation ability of the whole company as a whole.

Conclusion

The development of smart grid makes the traditional scheduling model need to keep pace with the times. This paper analyzes some problems in the development process, and gives the corresponding coping strategies, which provides some reference for its future development.