Preventing out-of-synchronism reclosing between power systems

摘要

The present disclosure provides apparatus, systems, and methods for preventing out-of-synchronism closing between power systems. An intelligent electronic device (IED) apparatus may include a control component and a delay component. The control component is configured to selectively control opening and closing of a breaker. The control component selectively outputs a close signal to cause the breaker to connect a first portion of a power delivery system to another portion of the power delivery system. The delay component is configured to delay output of the close signal to the breaker. The delay component includes circuitry independent from control by the control component and the delay component is inconfigurable from a remote location.

主权项

1. An intelligent electronic device (IED), comprising:
a control component configured to selectively control opening and closing of a breaker, wherein the control component selectively outputs a close signal to cause the breaker to connect a first portion of a power delivery system to another portion of the power delivery system, the control component comprising:
a synchronization component in communication with the power delivery system, the synchronization component configured to determine whether the first portion of the power delivery system is synchronized with the another portion of the power delivery system and output a synchronization signal when the first portion of the power delivery system is synchronized with the another portion of the power delivery system; and,a delay component in communication with the control component, configured to delay for a delay time, an output of the close signal to the breaker until both the synchronization signal is received from the synchronization component and the delay time ends, wherein the delay component comprises circuitry independent from control by the control component and wherein the delay component is only configurable by physical alteration of the IED; wherein the delay component is configured to output the close signal to the breaker without delay upon receipt thereof until a predetermined number of close signals within a predetermined time period have been provided by the control component, after which the delay component is configured to delay further control commands.