智能变电站站域保护控制装置的研制

Development of Substation-area Protection and Control Device in Smart Substation

站域保护控制装置通过通信网络实现全站的模拟量、开入量、开出量的全景信息共享获取,实现全站的保护和控制功能。文中重点介绍了基于全站功能集成的站域保护控制装置的硬件实现和软件实现。针对变电站改建和扩建带来的模型升级和功能扩展问题,采用"搭积木"组合方式实现智能电子设备能力描述(ICD)模型的灵活扩展,采用平台软件与应用软件模块解耦方式实现功能的可灵活裁剪。文中应用哈希算法对网络流量进行抑制,提出基于合并单元采样序号自学习调整秒脉冲宽度的方法,以及采用单一数据源失步不闭锁保护的方法。同时,提出基于全站主接线拓扑结构闭锁的简易母线保护、合闸于故障的加速保护和变压器死区保护联跳各侧的保护方案,优化装置的后备保护功能。通过对装置的动模、数据流量等测试结果表明,站域保护装置能够满足智能变电站的保护要求,证明其在智能变电站应用中的实用性和可靠性。

The substation-area protection and control device gets and shares the information about the substation＇ s analogs, binary inputs, binary outputs through a communication network to realize all the substation＇ s protection and control functions. The paper mainly focuses on the hardware and advanced application software implementation of substation-area protection and control. In view of the model＇s updating and function expansion problem brought about by the restructuring and expansion of substations, a ＂building block＂ method is used to achieve flexible expansion of an intelligent electronic device （IED） capability description （ICD） model, and a decoupled method of platform software and application software is used to achieve flexible functions. A Hash algorithm is used to curb the network flow. A pulse per second width adjustment method is proposed based on self-learning of the merging unit sampling sequence number and a non-blocking protection method is used for a single data source getting out-of-step. Meanwhile, a protection scheme of simple busbar protection, switch-onto-fault protection and transformer end fault protection is proposed for optimizing backup protection. The dynamic and data flow simulation results show that the substation-area protection and control device can satisfy the protection requirement on smart substation for its practicality and reliability.