| 摘要 |
Exemplary embodiments are directed to a redundancy scheme for bay protection in Substation Automation (SA) that prevents a single failing Intelligent Electronic Device (IED) of the SA system from impairing the operation of a bay of a substation. A protection IED assigned to a home or host bay of a substation of an electric power system performs the protection functions of the bay to which it is assigned, plus protection functions of at least one of its neighboring bays. As a result, each bay can be managed by two different protection IEDs, wherein redundancy is achieved without a dedicated redundant protection IED for each bay. Whenever required to do so, the protection IED receives, from appropriate sensors, information about a status or value of a process quantity from the neighboring bay, computes or executes protection functionality such as overcurrent, overvoltage or earth fault on behalf of the neighboring bay, and issues commands directed to actuators of said neighboring bay. |
