基于线路态势感知的台区检修决策优化技术研究

A Study on Optimization Technology of Maintenance Strategy in Power Distribution Areas Based on Line Situation Awareness

传统方式下低压台区采用计划检修以及事后抢修的模式,运维检修决策模式固化、滞后的弊端明显。以当前低压配电网数据为基础,以用户回路阻抗计算为手段,提出台区线路状态感知评估模型,支撑台区检修模式转型。基于台区简化网络拓扑构建用户回路阻抗方程,并采用约束线性最小二乘模型进行求解;考虑线路阻抗状态与故障类型的关联关系,创新性提出台区线路随机故障与累积故障状态判定模型;构建考虑检修成本的经营成效评估模型,并以经营成效最大化为目标,结合供电可靠性约束条件,建立基于非线性规划方法的台区检修决策优化模型。以某个含376个公变台区的供电所为例,进行了算例分析,验证了所提模型与算法的有效性。

Under the traditional mode,the planned maintenance and emergency repair are adopted in the power distribution station,in which the decision-making is rigid with obvious lagging disadvantages.Based on the data of the current LV power distribution network,by means of calculation of the user loop impedance,this paper proposes a model to fully sense and evaluate the line state of the transform area,so as to support the transformation of the maintenance mode.First,the impedance equation of the user loop is established by simplifying the network topology,and the impedance of the user loop is calculated using the constrained linear least square model.Second,considering the relationship between line impedance state and fault type,the decision model of random fault and cumulative fault states of the line in the transformer area is proposed innovatively.Furthermore,the operation effectiveness evaluation model considering the maintenance cost is constructed,and with the objective of maximizing the operation effectiveness,combined with the constraints of power supply reliability,the optimization model of the maintenance decision of the transformer area is established based on a nonlinear programming method.Finally,the effectiveness of the proposed model and algorithm are verified by taking the power supply station covering 376 common transformers as an example.