Schweitzer Engineering Laboratories, Inc.

Christopher Ewing

Ryan Bradetich

David James Dolezilek

Dennis Gammel

Jerry J Bennett

Benjamin S Day

Rhett Smith

Nathan Paul Kipp

Kimberly Ann Yauchzee

Systems and methods are presented for managing communication between devices in an electric power generation and delivery system. In certain embodiments, a method for managing communication messages performed by a network device included in an electric power generation and delivery system may include receiving a message including an identifier and data state information via a communications interface. A determination may be made that that the message represents a data state change associated with the identifier. The message may be stored in a message buffer associated with the identifier. Finally, the stored message may be transmitted from the message buffer to an intelligent electronic device.

Systems and methods for communicating data state change information between devices in an electrical power system

Systems and methods are presented for exchanging messages between devices in an electrical power generation and delivery system. In certain embodiments, a method for exchanging messages between devices may include transmitting messages included in a message stream that includes multiple redundant copies of the messages. An indication may be received that at least one message of the message stream was received by an intended receiving device. Transmission of further redundant copies of the message included in the message stream may be determined based on receipt of the indication.

Exchange of messages between devices in an electrical power system

According to various embodiments, a session manager generates, stores, and periodically updates the login credentials for each of a plurality of connected IEDs. An operator, possibly via an access device, may provide unique login credentials to the session manager. The session manager may determine the authorization level of the operator based on the operator's login credentials, defining with which IEDs the operator may communicate. According to various embodiments, the session manager does not facilitate a communication session between the operator and a target IED. Rather, the session manager maintains a first communication session with the operator and initiates a second communication session with the target IED. Accordingly, the session manager may forward commands transmitted by the operator to the target IED. Based on the authorization level of the operator, a session filter may restrict what may be communicated between an operator and an IED.

Systems and methods for managing secure communication sessions with remote devices

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Colfax, WA, United States of America

Christopher Ewing