EPICS redundancy technology based on PRP

LIU Shaohai; CHEN Yongzhong; HAN Lifeng

doi:10.11889/j.0253-3219.2015.hjs.38.040401

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EPICS redundancy technology based on PRP

更新时间：2021-03-03

- EPICS redundancy technology based on PRP
- NUCLEAR TECHNIQUES Vol. 38, Issue 4, Article number: 040401(2015)
- 作者机构：
  
  1. 中国科学院上海应用物理研究所嘉定园区,上海,201800
  2. 中国科学院大学,北京,100049
  3. 中国科学院核辐射与核能技术重点实验室,上海,201800
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2015.hjs.38.040401
  CLC：
- Published：09 April 2015
- 稿件说明：
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LIU Shaohai, CHEN Yongzhong, HAN Lifeng. EPICS redundancy technology based on PRP[J]. Nuclear techniques, 2015, 38(4): 040401
DOI：

LIU Shaohai, CHEN Yongzhong, HAN Lifeng. EPICS redundancy technology based on PRP[J]. Nuclear techniques, 2015, 38(4): 040401 DOI： 10.11889/j.0253-3219.2015.hjs.38.040401.

摘要

冗余技术是提高EPICS (Experimental Physics and Industrial Control System)在核电领域应用可靠性的有效解决方案。不同于当前采用的“热备用”冗余模式，本文借鉴IEC 62439-3标准所发布的并行冗余协议(Parallel Redundancy Protocol

PRP)阐述的“并行”冗余模式，分析了该协议的应用层实现方案用于EPICS系统的可行性，并参照EPICS的通道访问协议(Channel Access

CA)，在Linux系统下开发了基于PRP的EPICS CA协议软件。测试表明，基于PRP应用层协议方案的EPICS CA协议，在网络单点故障时可以实现无缝切换的高可靠性要求，为提高核电领域EPICS系统的通信网络可靠性，提供了实现方式。

Abstract

Background: Redundancy technology can be used as an effective solution to improve the reliability of Experimental Physics and Industrial Control System (EPICS) applied to nuclear reactor

and the most popular redundancy method is a standby mode with the switching time less than 1 s. Meanwhile

the Parallel Redundancy Protocol (PRP) released in standard IEC62439-3 is proposed as a possible solution to provide zero switching time in case of a single-point failure. Purpose: In order to further improve the reliability of EPICS to fulfill the high-reliability requirements of the redundancy control network in nuclear reactor

the "parallel" redundancy mode elaborated in PRP is applied to the nuclear reactor. Methods: The feasibility of EPICS achieving a high reliability based on PRP technology is analyzed

and a software implementation example of Channel Access (CA) protocol of EPICS has been developed over Linux based on PRP which implemented on the application layer. Results: Test results show that the high-reliability requirements of completely seamless switchover can be realized when a single-point failure occurs in the redundant network. Conclusion: With the proposed implementation plan

the redundant EPICS can be employed to achieve a high-reliability network for nuclear reactor. Abstract

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Related Institution

CNNC Nuclear Fuel Components Co., Ltd.

Institute of Nuclear Energy Safety Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences

University of Science and Technology of China

Xinjiang Institute of Physics and Chemistry

新疆理化技术研究所

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