环网分布式母线保护装置就地化实现探讨

针对层次化继电保护控制系统中保护装置就地安放的需求,目前集中式母线保护直接就地安放存在功耗过大、回路复杂等问题,提出了基于HSR环网的分布式母线保护就地化实现方案。该方案中,各间隔配置独立的间隔子机,独立采集各个间隔的采样和开关量数据。通过双重冗余HSR环网将子机互联并共享数据,采用全主式设计方案,各子机独立逻辑判断,改进的插值同步技术使得母线保护不依赖于外界对时,同时增加光旁路设计,降低了母线保护运维的复杂性。该母线保护样机成功通过专业机构检测和试运行,验证了该方案的可行性。

Local placing implementation research of distributed HSR busbar protection

According to the requirement of the protection equipment's local placing in the hierarchical relay protection control system and because of the problems, such as large power supply, complex link, etc., the centralized busbar protection cannot be directly placed locally. This paper puts forward a distributed busbar protection locally placing implementation scheme based on HSR ring network. In this scheme, at each interval it locally places the corresponding independent submachine to get the interval's sampling value and digital data. Using dual redundant HSR ring network to interconnect each submachine and share each data, each submachine owns whole busbar protection function and judges independently. The new interpolation synchronization technology makes the busbar protection not rely on the external clock, at the moment the bypass technology designed can reduce the complexity of operation. This busbar protection model machine has been successfully passed the professional institute's test and trial work in the substation, which verify the feasibility of this scheme.