Distribution Sectionalizing & System Protection Studies
Utility electric distribution and transmission systems are sectionalized by a variety of different protective devices installed across the system for the purpose of protecting the system from damaging fault currents and minimizing the time and number of consumers experiencing an outage. These sectionalizing devices are also paramount in ensuring public safety in the event of a downed conductor or contact with an energized line. Over time, changes to sectionalizing equipment and protective schemes are required as a result of new construction and line changes, system configuration changes, and increased fault current levels resulting from substation, transformer and transmission line upgrades.
To ensure proper protection of your system, each protective device must be periodically reviewed to evaluate its ability to:
Sense the minimum fault current in its zone of protection
Interrupt the maximum fault at its current location
Adequately handle continuous load currents during peak conditions and emergency backfeeding configurations
- Properly coordinate with upstream and downstream devices
The Power System Engineering, Inc. (PSE) team of professionals has many years of experience working with utilities in the area of sectionalizing and system protection. PSE can lead or assist your utility with:
- Evaluating sectionalizing equipment and making recommendations for change where deficiencies are found or where system improvements require changes to existing protective devices and schemes
Verifying size, type, and settings of reclosers that are re-installed during maintenance schedules
Assisting with programming of new and existing devices to accommodate protection requirements
Assisting with developing protective schemes when distributed generation is being interconnected with the system
Greater Personnel Demands
Due to changes in the industry, utility personnel are faced with greater demands on their time than ever before. Unfortunately, a consequence of these increased demands is that a proper review of system protection is not always completed in a timely manner. Whether you are evaluating sectionalizing for your entire system or just for those areas where recloser maintenance will occur, you can count on PSE’s expertise. Our professionals work on your behalf with a commitment to the safe and efficient operation of your utility’s system.