Relay-to-relay direct communication system and method in an electric power system
First Claim
1. A relay-to-relay direct communication system in a power system, the relay-to-relay direct communication system comprising:
- a first protective relay including a first transmit module, the first transmit module including a first microcontroller adapted to provide a plurality of data channels, each of the plurality of data channels associated with channel data having a variety of bit-lengths; and
a second protective relay directly coupled to the first protective relay via a communication link, the second protective relay including a first receive module, the first receive module including a second microcontroller adapted to provide the plurality of data channels, wherein a speed of receipt of the channel data associated with a particular data channel of the plurality of data channels as a plurality of serial messages by the first receive module is adjustable based on an assignment of the channel data associated with the particular data channel to multiple data channels of the plurality of data channels of the first transmit module.
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Abstract
Provided is a system relay-to-relay direct communication system and method in a power system. The relay-to-relay direct communication system includes a first protective relay having a first transmit module where the first transmit module includes a first microcontroller adapted to provide a plurality of data channels. Each of the plurality of data channels is associated with channel data having a variety of bit-lengths. The relay-to-relay direct communication system also includes a second protective relay directly coupled to the first protective relay via a communication link. The second protective relay includes a first receive module where the first receive module including a second microcontroller adapted to provide the plurality of data channels. A speed of receipt of the channel data by the first receive module is adjustable based on an assignment of the channel data to the plurality of data channels of the first transmit module.
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Citations
29 Claims
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1. A relay-to-relay direct communication system in a power system, the relay-to-relay direct communication system comprising:
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a first protective relay including a first transmit module, the first transmit module including a first microcontroller adapted to provide a plurality of data channels, each of the plurality of data channels associated with channel data having a variety of bit-lengths; and a second protective relay directly coupled to the first protective relay via a communication link, the second protective relay including a first receive module, the first receive module including a second microcontroller adapted to provide the plurality of data channels, wherein a speed of receipt of the channel data associated with a particular data channel of the plurality of data channels as a plurality of serial messages by the first receive module is adjustable based on an assignment of the channel data associated with the particular data channel to multiple data channels of the plurality of data channels of the first transmit module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A relay-to-relay direct communication system in a power system, the relay-to-relay direct communication system comprising:
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a first protective relay including a first transmit module, the first transmit module including a first microcontroller adapted to provide a plurality of data channels, each of the plurality of data channels associated with channel data having a variety of bit-lengths; and a second protective relay directly coupled to the first protective relay via a communication link, the second protective relay including a first receive module, the first receive module including a second microcontroller adapted to provide the plurality of data channels, the communication link adapted to transmit a plurality of serial messages at a predictable rate, each of the plurality of serial messages formed using channel data bits corresponding to the channel data, wherein each of the first and second microcontrollers is further adapted to provide communication link monitoring capability via detection of corrupted serial messages and missing serial messages of the plurality of serial messages, and to calculate communication link availability based on a number of the corrupted and missing serial messages during a time period. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A relay-to-relay direct communication system in a power system, the relay-to-relay direct communication system comprising:
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a first protective relay including a first transmit module, the first transmit module including a first microcontroller adapted to provide a plurality of data channels, each of the plurality of data channels associated with channel data having a variety of bit-lengths; and a second protective relay directly coupled to the first protective relay via a communication link, the second protective relay including a first receive module, the first receive module including a second microcontroller adapted to provide the plurality of data channels, the communication link adapted to transmit a plurality of serial messages at a predictable rate, each of the plurality of serial messages formed using channel data bits corresponding to the channel data, wherein a speed of receipt of the channel data by the first receive module is adjustable based on an assignment of the channel data to the plurality of data channels of the first transmit module, and wherein each of the first and second microcontrollers is further adapted to provide communication link monitoring capability via detection of corrupted serial messages and missing serial messages of the plurality of serial messages, and to calculate communication link availability based on a number of the corrupted and missing serial messages during a time period. - View Dependent Claims (25, 26, 27, 28)
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29. In a relay-to-relay direct communication system in a power system, the relay-to-relay direct communication system having a first protective relay including a first microcontroller adapted to provide a plurality of data channels and having a second protective relay directly coupled to the first protective relay via a communication link, the second protective relay including a second microcontroller adapted to provide the plurality of data channels, each of the plurality of data channels associated with channel data having a variety of bit-lengths, a method for calculating communication link availability, the method comprising:
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converting the channel data into a plurality of serial messages; transmitting, via the communication link, each of the plurality of serial messages at a predictable rate; determining an aggregate number of received uncorrupted serial message; and dividing the aggregate number of uncorrupted serial messages received during a time period by a number of serial messages expected to be received during the time period.
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Specification