继电保护定值仿真模型研究及系统开发

发布时间：2018-02-26 13:35

本文关键词： 阶段式保护定值仿真模型面向对象Petri网系统开发图形显示　出处：《华中科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：目前，继电保护定值是在离线模式下采用方式组合的整定方法计算得到的。当系统出现某些特殊方式时，离线整定得到的定值可能难以满足选择性或灵敏性的要求。因此，需要对故障情形下保护的动作行为和保护之间的配合关系进行仿真模拟，以确保定值在各种运行方式下的正确性和可靠性。本文对继电保护定值仿真中的理论问题和关键技术问题进行研究，内容包括继电保护基本原理、定值仿真模型和保护定值仿真系统实现。首先，对阶段式保护的基本原理进行了研究。分析了保护之间、保护与重合闸之间的配合关系，研究了各种类型保护的动作特性，并对影响保护定值性能的因素进行了探讨。然后，建立了基于面向对象Petri网的定值仿真模型。该模型将断路器及其相关的保护、重合闸等封装为一个保护仿真单元，大大的减少了整体模型的复杂程度；并引入决策控制单元，，使之能够清晰地展示各种时间定值的配合情况；定义了对象间的通信机制，使得模型能够描述保护之间的配合关系。最后，在上述理论和模型的基础上，构建了继电保护定值仿真系统。详细阐述了系统各模块的具体功能，并对软件开发过程中的关键问题提出了实际可行的解决方案。以VB. NET为开发工具完成了定值仿真系统的开发。该系统具有友好的图形界面，操作简单、方便，并能将仿真结果以图形的形式清晰直观地展示给用户。仿真实例表明该系统能很好的完成继电保护定值仿真校验功能。
[Abstract]:At present, relay protection setting is calculated by the method of combination of modes in off-line mode. When there are some special ways in the system, the setting obtained by off-line setting may not meet the requirements of selectivity or sensitivity. It is necessary to simulate the protection action behavior and the coordination relationship between the protection and the fault protection. In order to ensure the correctness and reliability of the fixed value in various operation modes, this paper studies the theoretical problems and key technical problems in the simulation of relay protection setting, including the basic principles of relay protection, The simulation model of fixed value and the simulation system of protecting fixed value are realized. Firstly, the basic principle of stage protection is studied, the coordination relationship between protection and reclosing is analyzed, the action characteristics of various types of protection are studied, and the factors that affect the performance of protection setting are discussed. Then, the simulation model based on object-oriented Petri net is established, which encapsulates the circuit breaker and its related protection, reclosing and so on into a protection simulation unit, which greatly reduces the complexity of the whole model. The decision control unit is introduced to show the coordination of different time and value clearly, and the communication mechanism between objects is defined so that the model can describe the relationship between protection and protection. Finally, on the basis of the above theory and model, the simulation system of relay protection setting value is constructed, and the specific functions of each module of the system are described in detail. A practical and feasible solution to the key problems in the process of software development is put forward. Using VB. NET as the development tool, the development of the fixed value simulation system is completed. The system has friendly graphical interface, simple operation and convenient operation. The simulation results can be clearly and intuitively displayed to the user in the form of graphics. The simulation example shows that the system can accomplish the function of relay protection setting simulation and verification well.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM77

【参考文献】