Challenges: The Ethernet network is one of the most significant infrastructure components used to construct the smart grid and the quality of network is the key factor that affects the operating performance. The switches must overcome the harsh environment with strong EMI and support the real time protocol for seamless data transmission.
IED
Via an Ethernet network, the Intelligent Electronic Devices (IEDs) are able to connect with a RTU and satisfy all management needs.
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RTU
The Remote Terminal Unit (RTU) collects and sends data to a central control room, which may be located a long way from the substations which make up the Transmission / Distribution system.
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The harsh environment of power substation demands specially hardened reliable network infrastructure to support the IED’s. Lantech provides managed switches that comply with the latest IEC 61850-3 & IEEE 1613 standards which define specifications for operation in the substation environment covering EMI/RFI e.g. from inductive load switching, lightening, electrostatic discharge, interference from portable radio handsets, ground potential rise resulting from high current fault conditions within the substation, and a variety of other EMI phenomena commonly encountered in the substation environment.
One of the most important features of IEC 61850-3 is the ability to transfer events immediately with security and dependability - Generic Object Oriented Substation Events (GOOSE) is a control model defined by IEC 61850-3 to transport critical events such as intertripping, over substation networks. Based on VLAN and priority tagging, GOOSE group messages are securely accessed within VLAN groups and being priority serviced in the network. Defined by the standard, the GOOSE messages transfer data with a maximum delay of 4ms in a network environment.
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