SMART VOLTAGE REDUCTION AND REVERSE POWER OPERATING MODE DETERMINATION FOR LOAD TAP CHARGING TRANSFORMERS AND VOLTAGE REGULATORS

摘要

The present disclosure relates to a system for using load tap changing (LTC) transformers and voltage regulators to more accurately reduce the voltage in a power transmission system. It further relates to a system for determining the operating mode for LTC transformers and VRs during reverse power flow. Corresponding methods are also disclosed. The various components of the present system, and the manner in which they interrelate, are more fully described hereinafter.

主权项

1. A system for more accurately reducing applied voltages comprising:
a power distribution system, the distribution system including a power generator and a load, the power generator delivering an applied voltage at a predetermined level to the load; the power distribution system including a load tap changing (LTC) transformer or voltage regulator, the LTC transformer or voltage regulator including tap selector switches, the tap selector switches selectively engaging a contact to thereby lower the applied voltage, the tap selector switches reducing the applied voltage in set increments; a LTC controller for controlling the operation of the tap selector switches, the LTC controller establishing an upper band edge voltage, a lower band edge voltage, and a bandcenter that is between the upper and lower band edge voltages, the LTC controller functioning to keep the applied voltage between the upper and lower band edge voltages via the operation of the tap selector switches; means for temporarily disabling the upper band edge voltage and temporarily designating the bandcenter as the upper band edge voltage whereby the tap selector switches operate in set increments to reduce the applied voltage to a level that is between the redesigned bandcenter and the lower band edge.