System Impact Studies are usually performed prior to the addition of a new facility into an existing transmission system. Its purpose is to assess the impact of the proposed facility on the overall performance of the system. The ultimate goal of this evaluation is to look for possible violations of reliability and performance criteria caused by the addition of the new facility. These concerns include thermal overloading, voltage violations, power quality issues, reactive power deficiencies, and stability concerns; just to name a few.
The process usually starts with a high level evaluation geared towards utilities or power plant developers looking for potential sites for new generation over large areas. First-cut feasibility studies based solely on power flow studies are contemplated, and then more in-depth studies including transient stabilities studies, power quality studies, and short circuit analyses are performed.
Steady-state and dynamic performances of the existing system (without the proposed facility) are investigated to establish the baseline performance. Similar investigations are conducted while considering the proposed additions. These analyses help determine the impact of the proposed facility on the transmission system, help identify constraints that might restrict the transfer of power, help determine if available transfer capability is sufficient to accommodate the proposed transfer of power, help preserve the adequacy of system facilities, help ensure that short circuit current contributions from the proposed facilities are compatible with fault duties of existing breakers.
Numerous combinations of generation scenarios and loading pattern are considered to ensure that every possible operating condition is covered. All possible interconnection alternatives are evaluated from technical and economical standpoints then a recommendation is made by our staff our highly qualified professionals.
SAGEPS experts rely routinely on a number of tools for completing a wide range of activities. These tools include, but are not limited to:
♦ Power Flow Analyses
♦ Voltage Stability Studies
♦ Transient Stability Studies
♦ Motor Starting Studies
♦ Protection Devices Coordination Studies
♦ Power Factor Studies
♦ Harmonics Studies
♦ Switching Studies
♦ Power Transfer Capability Studies
♦ Insulation Coordination Studies
♦ Short Circuit calculations
♦ Electromagnetic Transient Analyses (EMTP, EMTDC)