适用于PEBB采样系统的高速光纤隔离通讯装置

High speed and optic-isolated communication unit for sampling system in PEBB

为了解决系统中较高电压电流变换率对采样产生的干扰问题,提出一种基于现场可编程门阵列(FPGA)的光纤隔离采样通讯装置,并阐述了该装置的具体设计思路及步骤。这种装置可实现信号采样并进行数字化传输和接收,具有优良的绝缘性能和暂态特性,对复杂电力电子系统隔离采样及信号传输有工程实用价值。最后通过实验给出了两个节点间数据传输波形及延时,分析和计算结果证实该装置的有效性。

In order to reduce the sampling interruption induced by high dI/dt and dV/dt in the system,a field programmable gate array（FPGA）-based and optic-isolated communication unit was proposed,and the design philosophy and highlights of this method were described in detail.In the unit,the sampled values can be transmitted and received in digital mode.It was point out that,in complicate power electronic system,application of this unit has practical value for their excellent performance in insulation and transient characteristics.Finally,waveforms and propagation delay between two modes were presented by experimental result.According to capacity calculation,the feasibility of the system design was proved.