发输电组合系统可靠性随系统负荷变化的规律研究发输电组合系统可靠性随系统负荷变化的规律研究.pdf

Smart Grid 智能电网, 2014, 4, 231-241 Published Online December 2014 in Hans. /journal/sg /10.12677/sg.2014.46033 Study on the Reliability Variation of Generation and Transmission System with Load Rate Pan Duan South Bank Bureau, State Grid Chongqing Electric Power Company, Chongqing Email: 824074768@ th th th Received: Nov. 13 , 2014; revised: Dec. 10 , 2014; accepted: Dec. 17 , 2014 Copyright © 2014 by author and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract The rules between the reliability indices of generation and transmission system, such as: LOLP (loss of load probability), LOLF (loss of load frequency), EENS (expected energy not supplied), and the system load are analyzed. The relationship model between the power system reliability and system load rate is modeled using cubic spline interpolation, and the model can be solved accord- ing to the interpolation boundary conditions, the interpolation points and derivative information. Therefore, a fast evaluation technique based on the proposed model for the reliability of power systems can be obtained, which can avoid the duplication of reliability evaluation with multi-load levels. The proposed model is applied to the RBTS system. Results indicate that the relationship between the system reliability and load rate is non-linear variation. The average error for the evaluation on the reliability in these cases is about 2.0% when the load changes. Keywords Load, Variation Regularity, Cubic Spline Interpolation, Generation and Transmission System, Reliability 发输电组合系统可靠性随系统负荷