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Distributed Video Networking Solution for Thermal Power Plants
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Introduction
 Distributed Control Systems (DCSs) are used in electricity, metallurgy, petroleum,
chemical, cement, filling, packaging, and water and wastewater
treatment applications to build up a surveillance monitoring
network of distributed equipment and sub-systems. The DCS
can monitor the remote site operation through a SCADA system
in the control center. Since real-time monitoring with
a DCS requires the installation of much equipment, such
as
PLCs,
Ethernet switches, video cameras, and IP phones, building
video, voice, and data into one Ethernet network has become
an optimum solution.
The DCS in a thermal power plant must maintain smooth data
flow to the control center, and also
support video
monitoring
and voice to
provide synchronous monitoring for coal burning facilities,
water supplies, and generators. In order to provide a high
quality
and real-time monitoring network, high bandwidth, excellent
anti-interference, and near real-time data transmission
are essential conditions.
System Description
In
a thermal power plant, a fiber gigabit video/voice/data
over IP network can provide non-stop operation
for real-time monitoring. The gigabit bandwidth meets
the high bandwidth demanded by this kind of system.
The Ethernet network formed by the Moxa EDS-518A Ethernet
switch
uses
the powerful Turbo Ring (recovery time < 20 ms) redundancy solution to establish a dual redundant ring
and increase the reliability and speed of the network backbone.
In the field,
the MOXA VPort
351 industrial video server works with analog video cameras
and microphones to provide real-time communication to
the central site. MOXA's products include wide temperature
(-40 to 75°C) operation, DIN-Rail mounting
capability, 12/24
VDC
or 24 VAC
redundant power inputs, IP30 protection, and are rugged
enough to operate in the harsh thermal power plant environment.
This
distributed control system works together with the SoftDVR
Pro network surveillance software, which was installed
in control
center, and helps
system integrators with remote management. MOXA SoftDVR
Pro supports up to 16 viewing formats, and can handle
complete video viewing and recording from video streams.
In addition,
the VPort 351 comes equipped with a pre/post alarm record
function that can ensure the complete tracking and quick
response to alarm events. In order to ensure the safety
of field site situations, the VPort 351's 2-way audio
provides real-time communication between system
administrators
and field engineers. |
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| Key Products |
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| Full motion, 1-channel MPEG4/MJPEG Industrial Video Encoder |
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Video stream up to 30 frames/sec at full D1 (720 x 480) resolution |
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Pre/post-alarm video recording function for advanced surveillance |
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2-way (1 in/ 1 out) audio supported |
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-40 to 75°C operating temperature range (T models) |
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Class 1, Div. 2 certified for use in hazardous locations (Pending) |
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VPort SDK PLUS and 4-channel video surveillance software provided free |
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| Industrial 16+2G-port Gigabit Managed Ethernet Switch |
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2 Gigabit plus 16 fast Ethernet ports for copper and fiber |
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Turbo Ring (recovery time < 20 ms), RSTP/STP (IEEE802.1W/D) for Ethernet redundancy |
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QoS, IGMP snooping/GMRP, VLAN, LACP, SNMP V1/V2c/V3, RMON supported |
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IEEE802.1X and https/SSL enhance network security |
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ABC-01 (Automatic Backup Configurator) for system configuration backup |
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