考虑系统风险的输电网线路除冰优化调度

发布时间：2019-06-18 14:50

【摘要】：为了降低冰灾期间系统的运行风险,提出一种输电网线路除冰优化调度模型。由气象预测与线路覆冰预测得到冰灾期间线路的冰风荷载,以应力?强度干涉模型为工具计算线路的时变强迫停运率,作为冰灾期间系统风险评估的元件停运模型。考虑系统的运行水平与线路覆冰厚度等约束,以线路除冰停运计划为变量,以除冰期间系统的电量不足期望值最小为目标函数,建立动态0-1整数优化问题,采用遗传算法进行求解。以IEEE-RTS系统为研究对象,设计两组基于经验的除冰方案与优化模型求解的方案并进行比较。结果表明,在三组方案均保证线路安全的前提下,优化模型求解的方案,使系统在除冰周期具有最小的风险水平。该模型可作为冰灾前制定除冰计划的工具。
[Abstract]:In order to reduce the operational risk of the system during the ice disaster, an optimal scheduling model for the de-icing of the transmission line is proposed. The ice wind load of the line during the ice disaster is predicted by the weather forecast and the line icing prediction, so as to stress? The intensity interference model is used to calculate the time-varying forced outage rate of the line, as an element shutdown model for the system risk assessment during the ice disaster. Taking into account the running level of the system and the thickness of the line ice, taking the line de-icing and stopping plan as a variable, taking the minimum expected value of the electric quantity of the system during the de-icing period as the objective function, building the dynamic 0-1 integer optimization problem, and using the genetic algorithm to solve the problem. Based on the IEEE-RTS system, two groups of experience-based de-icing schemes are designed and compared with the optimization model. The results show that, under the premise of ensuring the safety of the line in the three groups, the solution of the model is optimized, so that the system has the minimum risk level in the de-icing period. The model can be used as a tool to develop a de-icing plan before an ice disaster.
【作者单位】：西安交通大学电气工程学院;
【基金】：国家自然科学基金项目(51277140)~~
【分类号】：TM75;TM73

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