System and method of device validation
A system and method for identifying pinout information for an IED and operable to test the IED in accordance with a power system. The pinout information for many IEDs is conventionally lacking, leading to conventional testing systems that utilize amplifiers in order to generate the actual current and voltage levels of a power system for simulating the power system in conjunction with one or more IEDs. A system and method are provided to identify pinouts of an IED that can be utilized for simulating the power system with an IED without the need to generate actual current and voltage levels of the power system.
1. A system for determining a low-voltage interface of an intelligent electronic device (IED) of a power system, wherein the low-voltage interface includes one or more of locations of pinouts of the IED, voltage levels of the pinouts, functions of the pinouts, or current and/or voltage scaling factors, the system comprising:
an interface module including
a plurality of connectors configured to be electrically connected in one-to-one correspondence to the pinouts of the IED, and
one or more switches configured to
provide power to one or more pinouts of the plurality of pinouts of the IED, when a voltage signal from a power source is electrically coupled to the interface module, to selectively provide a sinusoidal signal or a pulse signal to one or more connectors of the plurality of connectors, and
select testing modes;
a sensor system operable to identify one or more pinout voltage levels of the IED when the voltage signal from the power source is electrically coupled to the interface module; and
a controller communicatively coupled with the interface module, the power source, and a supervisory control and data acquisition (SCADA) module operating in conjunction with the IED, wherein the controller is configured to
obtain, from the SCADA module, signals induced in the IED in response to predetermined voltage inputs by the power source to the IED through a first set of the connectors,
determine functionality of input pinouts of the IED corresponding to the first set of connectors based on the obtained signals,
obtain, from the SCADA module, measurements of currents through, and voltages across, the IED corresponding to a sequence of voltages of different amplitudes that is input by the power source to the IED through a first set of the connectors, and
calculate current- or voltage-scaling factors for the input pinouts based on the obtained measurements.
2. The system of claim 1 , wherein as part of determining functionality of each of the input pinouts, the controller is configured to determine that each of the input pinouts corresponds to
an analog input of the IED associated with an analog phase current or an analog phase-to-ground voltage, or
a digital input of the IED associated with a breaker pole state.
3. The system of claim 1 , wherein the controller is communicatively coupled with a real-time simulator (RTS) with the IED in a loop, and configured to
obtain, from the SCADA module, signals output by the IED through a second set of the connectors, and
determine functionality of IED's output pinouts corresponding to the second set of connectors based on the obtained output signals.
4. The system of claim 1 , wherein
the one or more switches are configured to select connectivity between the connectors and the pinouts of the IED, and
the controller is configured to verify continuity between the connectors and the pinouts of the IED.
5. The system of claim 1 , wherein the IED comprises one of a protective relay, a smart meter, a phasor-measurement unit, a microgrid controller or a microcontroller measurement device applied in a power system.
6. A method comprising:
determining the low-voltage interface of an IED of a power system by using the system of claim 1 ; and
operating the IED in connection with an overhead power line low-voltage sensor.
7. The system of claim 1 wherein the pinouts of the IED are electrical contacts.