论文标题
IEC61850基于减少的应用程序服务数据单元的样本值服务
IEC61850 Sample-Value Service Based on Reduced Application Service Data Unit for Energy IOT
论文作者
论文摘要
随着5G技术和低功率无线通信技术的开发，将大量的物联网设备引入到能源系统中。现有的物联网通信协议（例如MQQT和COAP）无法满足高可靠性和实时性能的要求。但是，61850-9-2样本值协议相对复杂，消息长度很大，难以确保输送速率有限的IoT设备实时传输。本文提出了基于应用程序服务数据单元的物联网控制器的9-2个样本价值协议。通信协议严格符合IEC61850-9-2，可以通过合并单元等现有智能电子设备来识别。该协议简化并修剪一些参数，并将浮点值更改为整数数据。考虑到无线通信的不稳定性，使用Uni-Cast或多播UDP/IP用于基于2.4GHz WiFi发送SV有效负载。最大传输速率最高可高达30 Mbps。实施减少SV的硬件采用ESP32-S，这是一个双核MCU，支持WiFi，频率为240MHz。软件基于Freertos，LWIP和Libiec61850。 PC或Raspberry Pi用作接收和分析数据包的主机，从而验证了SV协议降低的可行性。
With the development of 5G technology and low-power wireless communication technology, a large number of IOT devices are introduced into energy systems. Existing IOT communication protocols such as MQQT and COAP cannot meet the requirements of high reliability and real-time performance. However, the 61850-9-2 Sample value protocol is relatively complex and the message length is large, difficult to ensure real-time transmission for IOT devices with limited transmission rate. This paper proposes a 9-2 Sample Value protocol for IOT controller based on Application Service Data Unit. The communication protocol is strictly in accordance with IEC61850-9-2 and can be recognized by existing intelligent electronic devices such as merging units. The protocol simplifies and trims some parameters, and changes the floating point value to integer data. Considering the instability of wireless communication, uni-cast or multicast UDP/IP is utilized to send SV Payload based on the 2.4GHz WIFI. The maximum transmission rate can be up to 30 Mbps. The hardware to implement reduced SV adopts ESP32-S, which is a dual-core MCU supporting WIFI with frequency of 240MHz. Software is based on FreeRTOS, LWIP and Libiec61850. A PC or raspberry PI is used as the Host to receive and analyze packets, verifying feasibility of reduced SV protocols.
