Islanding in dispersed, utility-interactive photovoltaic systems
This report deals with the analysis of ''islanded'' operation in electric utility-connected, residential photovoltaic systems. Islanding is a phenomenon in which several such systems continue to operate and, together, keep the electric distribution system energized even after the primary source is disconnected. Such operation presents a hazard to utility and other personnel. We show how islanding can be studied using a combination of a power-flow- analysis-like method, an examination of large-signal limit-cycle behavior, and small-angle stability analysis that can account for control system response. The methodology is validated to a limited extent through simulation and testing. Studies conducted using the developed methods suggest that, although islanding is intrinsic to all systems, normal load variation, inverter protective mechanisms, voltage/frequency relays, and destabilizing feedback controls effectively limit the practical possibility of islanding. 14 refs., 63 figs., 2 tabs.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6236259
- Report Number(s):
- SAND-88-7042; ON: DE89013330
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects on electrical distribution networks of dispersed power generation at high levels of connection penetration
A study of islanding in utility-connected residential photovoltaic systems
Related Subjects
20 FOSSIL-FUELED POWER PLANTS
24 POWER TRANSMISSION AND DISTRIBUTION
PHOTOVOLTAIC POWER SUPPLIES
STABILITY
ELECTRIC UTILITIES
ELECTRONIC CIRCUITS
EQUATIONS
FLOWSHEETS
HEALTH HAZARDS
POWER CONDITIONING CIRCUITS
POWER DISTRIBUTION SYSTEMS
RESIDENTIAL SECTOR
DIAGRAMS
ELECTRONIC EQUIPMENT
EQUIPMENT
HAZARDS
POWER SUPPLIES
PUBLIC UTILITIES
SOLAR EQUIPMENT
140600* - Solar Energy- Photovoltaic Power Systems
200100 - Fossil-Fueled Power Plants- Power Plants & Power Generation
200300 - Electric Power Engineering- Power Transmission & Distribution- (-1989)