Load Flow Analysis

Load flow analysis is the steady state analysis of a power system network and provides the starting point for many other calculation functions in PowerFactory. The iterative AC method, for both balanced and unbalanced networks, uses an enhanced non-decoupled Newton-Raphson algorithm. The algorithm, optimised for stability and convergence, together with the multiple command options and sophisticated controller models, yields an accurate and reliable solution. A linear DC method, solving for active power flows and voltage angles, is an extremely fast and robust alternative.

• Balanced and unbalanced load flow for coupled AC and DC grids
• Meshed DC supergrid load flow analysis
• State-of-the-art numerical solvers for fast and robust convergence from arbitrary starting-points
• Active/reactive power and voltage regulation options, such as SVC, shunt and tap controllers
• Station- and network control features, including Q(U)-, cosphi(P)-, Q(P)-, and droop
• Local- and remote control options
• Secondary and primary control, inertial response
• Distributed slack by load and generation, including interchange schedules
• Consideration of active and reactive power limits, including (voltage-dependent) generator capability curves
• Accurate modelling of induction machines
• Voltage dependent load models
• User-definable load flow controller models
• Simple load/generation scaling, as well as automated feeder load scaling (balanced and unbalanced)
• Determination of "power at risk"
• Consideration of temperature dependency
• Reporting against continuous and short-term thermal ratings, which can optionally include dependencies on ambient temperature, wind speed or solar irradiance