Coordinated management means that DMS600 can utilize available measurements from many locations along with distribution networks and can make optimal control decisions to keep voltages at a good level and to minimize losses in the network. These measurement points include primary and secondary substations, pole-mounted switches, and even smart meters providing real voltage in customer premises.
The objectives of Volt-VAr control are:
- Keeping voltages in limits
- Reducing losses by minimizing reactive power flows
- Reducing peak power by voltage reduction
The voltage reduction (conservation voltage reduction, CVR) is an own mode in the application. In that mode, separate voltage limit parameters are used. The control variables include capacitor bank status and voltage tap changer or regulator set-point or position. Controllable capacitor banks and transformer tap changers can be selected in settings and are easy to change. The application supports both direct control of tap positions and setting voltage set-points depending on the mode of the controller (automatic/manual). The mode can be read from SCADA process object.
The application can run without capable load flow calculation using real voltage measurements via SCADA communication. When good load flow results (afterload estimation) are available so-called pseudo-measurements can be defined to use the results from the load flow calculation.