基于滑模变结构控制的三段式继电保护离线整定的定值性能分析

在传统的三段式继电保护离线整定的定值性能分析过程中，常因定值选择不合理而导致定值计算准确度低。为此，在确定影响分支系数大小的因素的基础上，将分支系数看作为预计算变量，建立故障分析模型，计算三段式继电保护过程后备保护定值；设定三段式继电保护离线整定定值优化约束条件，采用滑膜变结构控制方法设定控制策略，结合惩罚函数的形式将约束条件添加到目标函数中，将定值性能分析问题转化为无约束优化问题，实现基于滑模变结构控制的三段式继电保护离线整定的定值性能分析。实验结果表明，相比于传统方法，该方法的定值准确度更高，定值性能更好。

Performance Analysis of Three-stage Relay Protection Offline Setting Based on Sliding Mode Variable Structure Control

On the basis of determining the factors affecting the size of the branch coefficient, the branch coefficient is regarded as the expected calculation variable, the fault analysis model is established, and the fixed value of the backup protection in the three-stage relay protection process is calculated. The offline optimization constraints of three-stage relay protection setting value is set, and the synovial variable structure control method is utilized to set control strategy, combined with the form of penalty function,the constraints are added to the objective function, the fixed value performanceanalysis problem is converted into unconstrained optimization problem, implementation is based on sliding mode variable structure control of a three-stage relay protection o ff-line setting the fixed value of performance analysis. The experimental results show that the method has higher accuracy and better performance than the traditional method.