Calculating Real Utility Demand to Prevent Voltage Sag and Air Pressure Losses
Calculate real utility demand using empirical millisecond-level coincidence vectors to size low-impedance feeders and local buffers, preventing voltage sags and air loss.
Coincidence Ratio
Meaning
Statistical metric measures the relationship between the peak demand of a combined group of loads and the sum of the individual maximum demands of those units. The coincidence ratio typically ranges from zero to one with lower values indicating that different users draw their highest currents at different times. Utility planners utilize this figure to size shared neighborhood transformers.
Diversified Planning
Aggregating diverse users like residential homes and commercial shops usually drives down the coincidence ratio of a feeder. Industrial facilities with identical shift patterns create a different result because they often start heavy motors simultaneously. Designers avoid overbuilding substations by studying these historical patterns.
Calculation Factor
Applying the logic requires dividing the actual total peak observed at the junction by the arithmetic sum of every local peak. A value near parity suggests a high risk of equipment overload during extreme weather events. Monitoring peak overlap prevents unexpected failures on secondary networks.
Economic Optimization
Infrastructure costs fall when engineers can safely design for a coincidence ratio below eighty percent. Capital stays available for other projects when transformer capacity matches the actual shared peak rather than the total possible load. Regular audits verify that changing consumer habits have not pushed the overlap into dangerous levels.