核安全級DCS通信網絡殘差率設計研究
企業:北京廣利核系統工程有限公司 日期:2020-09-12
領域:DCS 點擊數:193

北京廣利核系統工程有限公司 李明利,李剛,張杰

摘要:核電廠系統是核電廠的神經中樞,是核電廠安全、可靠、穩定運行的重要保障,其中核安全級DCS承擔著重要的保護功能,數字化核安全級DCS以其高可靠、高診斷等特點已經成為技術發展趨勢。數字化技術以CPU/FPGA及通信技術為特征。核安全級DCS通信網絡的設計是一個關鍵問題。目前IEEE 7-4.3.2等標準中對通信的總體要求包括獨立性、確定性及總體可靠性等要求,IEC 61784-3中提出了對通信殘差率的要求。本文結合應用于數字化核安全級DCS的和睦系統的通信設計經驗,總結了通信系統可靠性的影響因素,并提出了高可靠性的通信系統的設計方法,通過該方法的應用,和睦系統的通信殘差率進一步降低,滿足了SIL3的要求。本方法作為一種實現安全要求的有益實踐,可以推廣到武器裝備等軍用領域。

關鍵詞:核安全級DCS;通信殘差率;和睦系統

Abstract: A nuclear digital control system (DCS) function as neuralcenters in the nuclear power plant, which is an important guaranteefor safe, reliable and stable operation. Nuclear safety level DCS playsan important role in protection. The digital safety DCS has become atechnology development trend with its high reliability and advanceddiagnostics. Digital technology is characterized by CPU / FPGA and communication technology. The communication network design ofnuclear safety DCS is a critical issue. Standard IEEE 7-4.3.2 gives thegeneral requirements of communication including independence,determinacy, and reliability, etc. Standard IEC61784-3 introduces residual error probability as the requirement of communication. In this paper, combined with the communication network development experience of FirmSys and requirements from IEC standards, we summarize the influencing factors of communication reliability, and put forward the design method to develop communication network with high reliability level. Through the application of the method, the residual error probability of FirmSys communication system is further reduced to meet the requirements of SIL3. As a useful practice to realize the safety requirements, the design method can be a reference for communication design in military industries.

Key words: Nuclear safety DCS; Residual error probability; FirmSys

在線預覽:核安全級DCS通信網絡殘差率設計研究

摘自《自動化博覽》2020年9月刊

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