Triple redundant digital protective relay and operating method therefor
AssigneeYpp Co., Ltd.
InventorsJong Han Shin, Yong Gil Kim, Jae Hyun Kim
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Abstract
Provided are a triple redundant digital protective relay and an operating method therefor. The triple redundant digital protective relay according to the present invention includes: three power monitoring control devices which have a triple redundant structure and control a circuit breaker for separating a failed power system based on a 2 out of 3 voting using real-time mutual data communication; and a central communication device which acquires data related to an operating state of the power system from the three power monitoring control devices and manages the acquired data related to the operating state of the power system.
Claims8
A triple redundant digital protective relay comprising:
- three power monitoring control devices which have a triple redundant structure and control a circuit breaker for separating a failed power system based on a 2 out of 3 voting using real-time mutual data communication;
- and
- a central communication device which acquires data related to an operating state of a power system from the three power monitoring control devices and manages the acquired data related to the operating state of the power system,
- wherein each of the three power monitoring control devices comprises:
- a CPU which controls a circuit breaker for separating a failed power system based on a 2 out of 3 voting using real-time data communication with other power monitoring control devices;
- a first circuit breaker trip circuit which is implemented by one signal relay as an output contact point for a trip control of the circuit breaker according to a first control signal from the CPU;
- and
- a second circuit breaker trip circuit which is implemented by two signal relays connected in series as an output contact point for a trip control of the circuit breaker according to a second control signal from the CPU,
- wherein each of said power monitoring control devices controls one of said two signal relays connected in series according to a first logic operation result thereof based on a 2 out of 3 voting, and controls said one signal relay according to a second logic operation result based on a 2 out of 3 voting of another of said power monitoring control devices.
A method for operating a triple redundant digital protective relay, the method comprising:
- detecting a failure or non-failure of a power system based on quantity of electricity calculated based on a voltage and a current;
- controlling a circuit breaker for separating a failed power system based on a 2 out of 3 voting using real-time mutual data communication through three power monitoring control devices which have a triple redundant structure;
- and
- acquiring data related to an operating state of the power system from the three power monitoring control devices and managing the acquired data related to the operating state of the power system,
- wherein each of the three power monitoring control devices comprises:
- a CPU which controls a circuit breaker for separating a failed power system based on a 2 out of 3 voting using real-time data communication with other power monitoring control devices;
- a first circuit breaker trip circuit which is implemented by one signal relay as an output contact point for a trip control of the circuit breaker according to a first control signal from the CPU;
- and
- a second circuit breaker trip circuit which is implemented by two signal relays connected in series as an output contact point for a trip control of the circuit breaker according to a second control signal from the CPU,
- wherein each of said power monitoring control devices controls one of said two signal relays connected in series according to a first logic operation result thereof based on a 2 out of 3 voting, and controls said one signal relay according to a second logic operation result based on a 2 out of 3 voting of another of said power monitoring control devices.
Dependencies are inferred from the claim text.