Introduction: Based on the analysis of the application scenario of the smart grid, it can be seen that the requirements of the services in different scenarios are quite different, which are reflected in different technical indicators.
Based on the analysis of the application scenario of the smart grid, it can be seen that the requirements of the services in different scenarios are quite different, which are reflected in different technical indicators. Operators and network equipment vendors should further quantify the technical indicators and architectural design of the network in response to the technical requirements of these industries, including further quantification of 5G network slice security requirements, service isolation requirements, end-to-end service delay requirements, and negotiation of network capabilities. Open requirements, network management interface, etc., as well as explore business cooperation models, future ecological environment, etc., provide complete solutions to meet the multi-scenario differentiation of the power industry, and carry out technical verification and demonstration.
New distributed power sources such as wind power generation, solar power generation, electric vehicle charging and replacing power stations, energy storage equipment and microgrid are energy supply methods built on the customer side, which can be operated independently or on the grid. With the deepening of China's energy reform and development, the rapid integration and total consumption of clean energy has become an urgent problem for power grid enterprises.
China's distributed power supply has developed rapidly, and its proportion has increased year by year, with an average annual increase of nearly 1 percentage point. By 2020, the installed capacity of distributed power sources will reach 187 million kilowatts, accounting for 9.1% of the total installed capacity in the country. Distributed power access is an indispensable part of the development of a strong smart grid. The integration of distributed power into the grid can bring huge benefits. In addition to saving investment in the transmission grid, it increases system-wide reliability and efficiency, providing emergency power and peak-load power support to the grid. At the same time, it also provides great flexibility for system operation. In the case of storms and snow and ice, when the large power grid is severely damaged, these distributed power sources can form silos or microgrids to provide emergency power to important users such as hospitals, transportation hubs and broadcast television.
However, the integration of distributed power sources brings new technical problems and challenges to the safe and stable operation of the distribution network. Since the design of the traditional distribution network does not consider the access of distributed power sources. After the integration of the distributed power supply, the structure of the network has undergone a fundamental change, from the original single-supply radial network to a dual-supply or even multi-power network, and the power flow on the distribution network side is more complicated. The user is both the electricity supplier and the power generator, and the current exhibits two-way flow and real-time dynamic changes.
Therefore, the distribution network urgently needs to develop new technologies and tools to increase the reliability, flexibility and efficiency of the distribution network. The distributed power monitoring system can realize the automatic system of distributed power supply operation monitoring and control, and has the functions of data acquisition and processing, active power regulation, voltage reactive power control, island detection, scheduling and coordinated control, and interconnection with related business systems. It mainly consists of distributed power monitoring main station, distributed power monitoring substation, distributed power monitoring terminal and communication system.