Protection system for devices in an electrical distribution network

A computer-implemented protection system for use in a multi-phase electrical distribution network, the system comprising:

• a first sensor operable to measure an impedance of a first device connected to a first phase of the distribution network to improve coupling of electrical potential from a source to a load;
• a second sensor operable to measure an impedance of a second device connected to a second phase of the distribution network to improve coupling of electrical potential from a source to a load;
• and
• a processor connected to the first and second sensors and programmed to:
• receive an impedance measurement from the first sensor,
• receive an impedance measurement from the second sensor,
• automatically calculate a variation in impedance of the first device, the variation being based on a comparison of the impedance measurement in the first phase to the impedance measurement in the second phase, and
• automatically perform a protection analysis of the first device based on the impedance variation.

A computer-implemented protection system for use in a multi-phase electrical distribution network, the system comprising:

• a sensor operable to measure an impedance of a capacitive device connected to a phase of the distribution network to improve coupling of electrical potential from a source to a load;
• and
• a processor connected to the sensor and programmed to:
• receive an impedance measurement from the sensor,
• automatically calculate a variation in impedance of the capacitive device, the variation being based on a comparison of the impedance measurement to a previous impedance measurement, and
• automatically perform a protection analysis of the capacitive device based on the impedance variation.