【摘要】 为了保障电力系统的安全稳定运行,需要对光纤通信网络传送继电保护信号传输方法进行研究,但是采用当前方法进行继电保护信号传输时,信号处理设备会产生较大的信号延迟,存在引发继电保护等装置误动的问题。为解决上述问题,提出一种基于编码波形的光纤通信网络传送继电保护信号传输方法。上述方法先利用相位差定义光纤通信信号传输系统的组成结构,给出网络绝对传输延时组成模型,得到延时包含的主要因素,将NRZ码和时钟信号相异或进行编码,采用保护式继电器接法对编码器和解码器进行设计,设定通信的同步头,组建光纤通信网络传送继电保护信号的双向传输机制,利用该机制完成对光纤通信网络传送继电保护信号传输。仿真证明,所提方法传输精度较高,为保障电力系统的安全稳定运行提供了依据。更多还原

【Abstract】 A transmission method for relay protection signal transferred by optical fiber communication network is proposed based on code waveform. Firstly,the phase difference is used to define composition and structure of transmission system of optical fiber communication signal,and a composition model of the network with absolute transmission delay is provided,then principal factor contained by delay is obtained. Moreover,the NRZ code and clock signal are differed or encoded,and relay connection method with protection type is used to design encoder and decoder. The synchronization head of communication is set and two-way transmission mechanism of the relay protection signal is built. Finally,the transmission of relay protection signal is completed by using the mechanism. Simulation proves that the method has high transmission precision. It can provide gist for ensuring safe and stable operation of electric system.更多还原