VAr Dispatch

What VAr Dispatch is for

VAr Volt-Ampere reactive power, relating to voltage control in the power system Dispatch See National Electricity Rules is a term used for issuing instructions to achieve stable voltage control of the electricity grid. These instructions typically request changes to reactive plant (such as, capacitors, reactors, and generating units), to increase or decrease the VAr contribution to the grid.

The purpose of VAr Dispatch is to introduce productivity gains in the National Electricity Market See Relevant Rules or Procedures (NEM) control rooms by providing a systematic approach to voltage control. The approach allows for operation of voltages at higher levels, potentially reducing losses on the transmission system.

RPO basic functional requirements

At a minimum, RPOs need:

1. One or more displays to show the instructions and conformance status sent by AEMO.
2. The ability to change the availability status of the plant and communicate the status to AEMO.
3. The ability to implement the instructions, for example, execute required changes to the reactive plant (such as: switching, setpoint control, or tap changes).