Analysis of Open-Phase Conductor Events

First of a kind technology to eliminate open-phase issues

The Challenge

Open-phase conductor events cause a loss of offsite power

Two open-phase conductor events resulting in a loss of offsite power; protective relaying schemes are not designed to detect open-phase conditions.

The Solution

Evaluate the issue; eliminate design vulnerability impacting the industry

MPR's solution utilized the following approach:

  • Identify an analysis methodology using first principles transformer models and plant system models; develop generic open phase detection logic
  • Ask to assist the manufacturer in the final development of technology to eliminate risk
  • Complete R&D of generic detection logic for open phase detection system
  • Develop detailed transformer models of various transformer winding configurations and core constructions to evaluate options
  • Validate models with field tests of open phase conditions

Ultimately, MPR developed a logic scheme to be used as a generic detection scheme.

The Results

First of a kind technology solves industry-wide problem

MPR teamed with our customer and its vendor to thoroughly review the development of first of a kind technology to eliminate open phase issues and continue to be involved solving an industry wide problem.

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