考虑综合需求响应的气电联合系统可靠性评估

气电联合系统是能源互联网的重要组成部分,其可靠性评估对系统安全运行具有重要意义.因此,提出一种考虑综合需求响应的气电联合系统可靠性评估方法.首先建立气电联合系统负荷削减优化模型,利用泰勒级数展开法对考虑气网潮流方向和天然气管道运行状态的天然气潮流约束方程进行线性化处理;其次引入电、气负荷综合需求响应以提升系统可靠性,并对可中断和可转移电、气需求响应负荷进行建模;然后提出考虑综合需求响应的气电联合系统可靠性评估指标,并基于序贯蒙特卡洛模拟法获取系统设备元件的运行状态,评估考虑综合需求响应的气电联合系统可靠性;最后对IEEE 24-NGS 12气电联合系统进行算例分析,评估了7种不同场景下气电联合系统的可靠性,仿真结果验证了所提方法的有效性.

Reliability evaluation of integrated electricity and natural-gas system considering integrated demand response

The integrated electricity and natural-gas system is an important part of energy internet, and its reliability evaluation is of great significance to the safe operation of the system. Therefore, a reliability evaluation method for integrated electricity and natural-gas system considering integrated demand response is proposed. Firstly, a load shedding optimal model of integrated electricity and natural-gas system is established, and the Taylor series expansion method is used to linearize the natural-gas flow constraint functions consi-dering the direction of natural-gas flow and the state of natural-gas pipelines. Secondly, the electricity and natural-gas load considering the integrated demand response is introduced to improve reliability of the system, and the interruptible and transferable electricity and natural-gas demand response load is modeled. Then, the reliability evaluation indexes of the integrated electricity and natural-gas system considering integrated demand response are proposed. Based on the system state obtained by using the sequential Monte Carlo simulation method, the reliability of the integrated electricity and natural-gas system considering integrated demand response is evaluated. Finally, the calculation example of IEEE 24-bus and NGS 12-node integrated electricity and natural-gas system is analyzed, which evaluates the reliability of the integrated electricity and natural-gas system under seven different kinds of scenarios, and the simulative results verify the effectiveness of the proposed method.