A Staged Event Source Location Identification Scheme in Power Distribution Networks Under Extremely Low Observability

Area of Science:

• Electrical Engineering
• Power Systems Analysis

Background:

• Synchrophasor measurement technologies offer enhanced visibility in power distribution networks (PDNs).
• High costs of measurement devices limit system observability and event source location identification (ESLI) accuracy.
• Existing ESLI methods face challenges under low-observability conditions.

Purpose of the Study:

• To propose a cost-effective staged ESLI scheme for PDNs with extremely low observability.
• To achieve high-precision ESLI and event current calculations with minimal measurement devices.
• To develop a voltage measurement deviation (VMD)-based algorithm for accurate event source localization.

Main Methods:

• A staged ESLI scheme based on voltage measurement deviation (VMD) is proposed.
• An ESLI model using virtual event current injection (VCI) is constructed to derive terminal bus voltage and outgoing current.
• A VMD-based staged ESLI algorithm is developed for ordered and accurate event source searching.

Main Results:

• The proposed VMD-based staged ESLI scheme achieves high-precision ESLI and event current solving.
• The method demonstrates effectiveness under extremely low-observability conditions.
• Experimental results on the IEEE 33-bus test system show significant performance improvement over state-of-the-art methods.

Conclusions:

• The developed VMD-based staged ESLI algorithm provides a highly accurate and cost-effective solution for event source location identification in PDNs.
• The scheme is particularly effective in scenarios with limited sensor deployment.
• This approach significantly enhances the capabilities of PDNs in managing and responding to events.