- Distributed Generation Study
Burns & McDonnell was retained by Gainesville Regional Utilities (GRU) to perform a dynamic stability study for its distribution system model and to study the system under normal and contingency conditions. The purpose of the study was to investigate whether the existing and new GRU generators will be stable under various operation conditions. The study evaluated the frequency, voltage and unit synchronism through the simulation to identify unstable conditions that could impact the overall system reliability.
The purpose of this analysis is to study the transient stability of the GRU electric distribution system following the addition of a new 7 MW generator to their system. Nine modeling scenarios were developed in three categories for the study:
- The existing 4.3 MW generator is in service
- The new 7 MW generator is in service
- Both 4.3 MW and 7 MW generators are in service
- The SEC is operating in parallel with the grid
- The SEC is operating isolated from the grid
- The SEC is operating only with the grid
- The motor is in service with a dynamic load model
- The motor is out of service
- The motor is started while separated from the grid
Burns & McDonnell performed the transient stability analysis to evaluate the GRU distribution system based on the load forecast for 2015 and 2020. The objective of the stability analysis was to assess the violations caused by the existing and new generators on the GRU distribution system. A report will be provided that summarizes the outcomes of the study including the frequency, voltage profilesand the unit angles used to determine whether the units are stable within the defined operating conditions and contingencies.
The preparation of the distribution system analysis began with a general review of the existing electric power system, generator models data and GRU’s planning criteria.
- Transient stability analysis
- Short circuit analysis
- Voltage profile analysis