Aggregation of Voltage-Controlled Devices During Distribution Network Reduction

Quasi-steady state time-series (QSTS) simulation of distribution feeders can become computationally burdensome due to many buses and devices, long horizons, and/or high temporal resolution. To reduce this burden, network reduction removes shifts loads/generation the remaining circuit produce a smaller equivalent. However, voltage-controlled devices have traditionally limited reduction, since their operation depends on measurement voltage at local bus. This work includes with by replacing an estimate from fast sensitivity approach, which is integrated directly into modified QSTS simulation. Comprehensive tests unbalanced feeder real operating data volt-var controlled inverters show agreement in cumulative reactive power output between reduced original circuits. The maximum error 0.005 Vp.u., nearly identical benchmark without smart inverter control. algorithm convergences for every time step, even when reducing frequency estimation was updated. While methodology demonstrated control, it represents frequent use case, be extended other devices.