基于无线同步技术的数字化变电站二次系统新型测试方法

A new testing method based on wireless synchronization technology for the secondary system of digital substation

针对数字化变电站已与传统变电站结构及数据传输方式不尽相同,用传统站的测试方法已不再适用于数字化站,该文提出一种面向数字化变电站的新型调试方法。基于无线同步技术2.4 GHz WLAN网络与IEEE 1588时间报文协议标准,该方法可对数字化变电站内多间隔多套二次系统装置同时、同步进行测试,其中同步过程能够实现主机与终端之间时差为4μs,即可实现同步注入数据进行测试。基于电磁暂态仿真算法对测试系统进行仿真建模,实现暂态数据的生成,并与电磁暂态仿真软件PSCAD进行校核,证明建模正确性。该新型测试方法能够实现数字化变电站二次系统测试功能,并可对站内多套保护装置进行系统测试,成果已应用于数字站变电站测试工作中。

This paper presents a new testing method for digital substation,aiming at the fact that the structure and data transmission mode of digital substation are different from those of traditional substation,and the testing method of traditional substation is no longer suitable for digital substation.Based on the wireless synchronization technology 2.4 GHz WLAN network and the time message protocol standard of IEEE 1588,this method can test the multiple secondary system devices in the digital substation simultaneously and synchronously.The synchronization process can realize the synchronization between the host and the terminal.The time difference is 4μs,so the synchronous injection data can be tested.Based on the electromagnetic transient simulation algorithm,the test system is modeled to generate transient data,and checked with the electromagnetic transient simulation software PSCAD to prove the correctness of the model.The new testing method proposed in this paper can realize the secondary system test function of digital substation,and can test many sets of protection devices in the station.The results have been applied to the substation test of digital substation.