Power Flow: Solution Theory

See Also

 

This help concentrates only on describing the basic set of equations that define the power flow solution. When you click Solve Power Flow in PowerWorld Simulator there is a lot more going on that solving these basic equations. Solve Power Flow in PowerWorld encompasses numerous voltage control algorithms such as tap changing transformers moving, phase shifters, switched shunts, generator MW control and so on. This is described in detail in the Solving the Power Flow help topic which discusses the Blue Loop (MW control), Green Loop (Voltage control) and Red Loop (power flow inner loop). The topic you are reading now only relates to the Red Loop which solves the Inner Power Flow Equations.

 

The power flow equations can be very simple when considering only local voltage control on a generator, but variations on this theme make the topic more complex. The following topics walk through the basics and then successively add the variations that describe the complete voltage control features for generation (and switched shunt SVCs).

• Bus Equation Basics
• Remote Voltage Regulation
• Power Flow: Mvar Sharing between Generators
• Line Drop Compensation
• Voltage Setpoint Tolerance (added in Simulator Version 21)
• Voltage Droop Control with Deadband (added in Simulator Version 21)
• Power Flow: Bus Category Possibilities