A construction scheme of regional power grid dispatching intelligent error prevention system based on D5000 system is proposed. The system architecture, system requirements, technical requirements and acceptance criteria of the system are described in detail. It provides reference for the construction of intelligent error prevention in the process of integration of regulation and control and intelligent layout in other power industry.
This paper analyzes the typical distribution network structure and the operating characteristics of distributed generation (DG). By analyzing the impact of grid-connected DG on equipment such as reclosing and spare power automatic switching, we calculate the power supply reliability indexs after the DG is connected to the grid under various operation modes such as reclosing, spare power automatic switching, de-sequencing distributed energy and islanding. Finally, the results of the reliability indexs can provide the theory and data for planning and improving the operating mode of grid-connected DG.
With the increasing expansion of power grid scale and the increasing complexity of power grid structure, the integration of power network is becoming more and more obvious. The existing real-time model of power network can no longer meet the requirements of network analysis and calculation. In order to improve the accuracy of online analysis and application function of power grid, a whole model splicing method of the provincial and regional power grid is proposed, and the modeling method of boundary equipment, boundary splicing method and processing of boundary T connection lines are studied. By applying the whole model splicing scheme on Tianjin Power Grid, and validating the result, the method can improve the accuracy and rationality of the result for whole model splicing of the provincial and regional power grid, at the same time meet the requirements of various network analysis and calculation.
In recent years, natural disasters happened frequently, which caused more and more failures of power system. To study the transmission lines failure under extreme hot weather, firstly the line's temperature changing with time is forecast based on the heat balance equation and the line's failure probability is calculated according to the historical statistics of failure rate. Then a test system to simulate the power grid under extreme hot weather is built and the curve of line's failure probability changing with time is obtained. The results provide a reference to power sector to guarantee the security and stability of the power grid.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.