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arXiv 2202.07394cs.NI
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基于能量应用服务数据单元缩减的IEC61850样本值服务IOT

IEC61850 Sample-Value Service Based on Reduced Application Service Data Unit for Energy IOT

Wenhao Xu, Nan Xie

摘要:

随着5G技术和低功耗无线通信技术的发展,大量物联网设备被引入能源系统。现有的物联网通信协议如MQQT和COAP不能满足高可靠性和实时性的要求。但61850-9-2采样值协议相对复杂,消息长度较大,对于传输速率有限的物联网设备难以保证实时传输。提出了一种基于应用服务数据单元的物联网控制器9-2采样值协议。通信协议严格按照IEC 61850 -9-2,可被现有的智能电子设备如合并单元识别。该协议对部分参数进行了简化和调整,将浮点值改为整数值。考虑到无线通信的不稳定性,在2.4GHz WIFI的基础上,采用单播或组播UDP/IP发送SV Payload。最大传输速率可达30 Mbps。实现降低SV的硬件采用ESP 32-S,这是一款支持WIFI的双核MCU,频率为240 MHz。软件基于FreeRTOS、Linux和Libiec 61850。采用PC机或树莓派作为主机接收和分析数据包,验证了简化SV协议的可行性。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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