Systems and methods of dynamic reactive voltage support for a power transmission system

摘要

Systems and methods of dynamic reactive power support (100) for a power transmission system (105) are provided. In one embodiment, a method of dynamic reactive power support (100) for a power transmission system (105) includes at least one circuit breaker (115) connecting a shunt capacitor bank containing at least one shunt capacitor (120) with a metal oxide varistor (MOV) (125) connected in parallel. A controller (130) is used to detect a voltage drop at the power transmission system (105) (e.g., substation bus). In response to detecting the voltage drop, the controller (130) closes the circuit breaker(s) (115) connecting the shunt capacitors (120) to the power transmission system (105). The controller (130) then monitors at least one MOV (125) to detect a current flow. Upon detection of a current flow in the MOV (125), the controller (130) disconnects one or more shunt capacitors (120) from the power transmission system (105) by opening one or more circuit breakers (115). The shunt capacitors (120) may be disconnected simultaneously, sequentially, in groups, or otherwise.