Calculation of Power System Overvoltages

• Published in: Transient Analysis of Power Systems pp. 203 - 274
• Main Authors: Martinez‐Velasco, Juan A, Castro‐Aranda, Ferley
• Format: Book Chapter
• Language: English
• Published: United Kingdom Wiley 2019; John Wiley & Sons, Incorporated; John Wiley & Sons, Inc
• Edition: 1
• Subjects: ATP; fast‐front overvoltages; insulation coordination studies; modelling guidelines; power system overvoltage calculation; slow‐front overvoltages; temporary overvoltages; time‐domain simulation; Power systems; Surges; Transient analysis; Lightning; Switches; Load modeling
• ISBN: 9781119480532; 1119480531
• DOI: 10.1002/9781119480549.ch6

This chapter presents a short description of the main causes of overvoltages and a summary of the modelling guidelines to be used when calculating overvoltages with a transients tool like ATP. For more details on these topics, readers are referred to the specialized literature on overvoltage calculation and insulation coordination studies. The chapter illustrates how to apply ATP to the calculation of different types of overvoltages and the estimation of the probability distribution of some random‐nature overvoltages. The calculation of power system overvoltages, regardless of their causes, must usually be based on a time‐domain simulation, an adequate modelling of the system components, and a large enough model of the system zone to be analysed. The chapter presents several case studies that analyse different causes of overvoltages in power systems. The description of each case study includes a summary of modelling guidelines, some details about the ATP implementation, and a selection of simulation results.