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Industrial Ethernet Book Issue 66 / 34
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Managing and securing a long Russian oil pipeline

Managing a 1600km long oil pipeline is no simple task, even for a leading oil pipeline company in Russia that owns the largest oil pipeline system in the world. As Chih-Hong Lin reports, a fibre-opticbased remote monitoring, control and management system was designed and installed, together with micro controllers and over 1000 industrial Ethernet switches for high reliability, redundancy, security and cost-effectiveness.

THE OIL PIPELINE, which runs through a variety of harsh natural and industrial environments, includes a parallel fibre optic backbone based on SDH multiplexers. This transmits standard E1 data streams over long distances. The backbone is connected with a variety of associated industrial installations, such as the ventilation, air conditioning (HVAC), fire alarm systems and others.

In order to transmit such a large amount of data aggregated from these numerous systems, the backbone must provide sustainable bandwidth for real-time delivery. The use of a long-distance fibre optic installation is, therefore, essential for this cross-country pipeline.

System requirements

This project called for remote monitoring, control and management of oil pipelines from the control centre, using fibre optics for longdistance data transmission across the country. The topology chosen was a Gigabit redundant ring to allow for high data availability.

The system chosen also, of necessity, had to be hardened so as to operate reliably in harsh environmental conditions, including extreme temperature variations, as well as difficult industrial situations.

To ensure that all data be transmitted accurately and immediately, a Gigabit Ethernet network comprising over 1000 Moxa EDS-510A industrial Ethernet switches was designed.

The Ethernet network was configured in as a ring topology - specifically a Turbo Ring (Fig.1) - to ensure data availability at all times with a fast recovery time of less than 20ms. The redundant Ethernet ring network was integrated with an SDH backbone to enhance reliability and security.

The EDS-510A provides up to three Gigabit Ethernet ports (RJ45/SFP) to address high bandwidth demands, making it ideal for building a Gigabit backbone with high bandwidth capability. Network management functions include IEEE 1588 PTP, IGMP snooping and GMRP, port-based VLAN, SNMPv1/v2c/v3, and port mirroring.

In addition, the EDS-510A switches support fibre optic transmissions up to 80km of long haul transmission, significantly reducing the number of installations required. With a -40C to 75C operating temperature range, these switches should be reliable, even in harsh Russian industrial environments.

At each node along the length of the pipeline, an ioLogik E2210 Active Ethernet micro controller - also by Moxa - is installed to allow for communications between the sensors and the Ethernet network. This 12-digital input and eight-digital output microcontroller provides event driven reporting and active messaging with time stamp, including SMS, SNMP trap with I/O status, TCP and email. It therefore provides precise event information and I/O status for real-time alarm. In this way, actions can be taken automatically to cope with unexpected events. The microcontroller supports the SNMPv1/v2c/v3 protocols.

Chih-Hong Lin is business development manager at Moxa Europe GmbH

Moxa oil and gas applications
Source: Industrial Ethernet Book Issue 66 / 34
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