METHOD AND APPARATUS FOR CONTROLLING VOLTAGE OF DISTRIBUTED PHOTOVOLTAIC POWER DISTRIBUTION NETWORK

摘要

Disclosed are a method and apparatus for controlling the voltage of a distributed photovoltaic power distribution network, which use a step-by-step control strategy from bottom to top. The method involves: when a feeder voltage rises to a warning value and does not exceed an upper limit value, a local controller executing local control over a reactive power feeder voltage of a photovoltaic inverter; when reactive power in a current area is depleted and the feeder voltage still reaches the upper limit value, using a regional controller to execute coordinated control over a regional reactive power feeder voltage; and when the reactive power capacity along a line is depleted and the feeder voltage still reaches the upper limit value, a power station controller executing on-load voltage-regulating transformer control, and when a transformer tap reaches an action limit and the feeder voltage exceeds the upper limit value, executing active power reduction control over the photovoltaic inverter until the feeder voltage does not exceed the upper limit value.