Creation of Libraries

Alternative Transients Program (ATP) capabilities can be used to represent the most important power components, calculate control system dynamics, incorporate user‐defined models, and develop module libraries. This chapter shows how to create a library of custom‐made modules for a specific type of studies, namely power quality studies. It presents the ATP as an adequate tool for power quality studies. The chapter covers the application of ATP to the analysis of two power quality categories: harmonics and voltage dips. It also covers three issues: generation and propagation of harmonics, voltage dip studies in distribution networks, and application of mitigation techniques for reducing harmonic currents and voltage dips. The system model implemented in ATPDraw incorporates custom‐made modules for representing the high voltage system equivalent, the substation and distribution transformers, the zig‐zag grounding impedance, overhead lines, loads, and voltage dip monitors.