1. IEC 61400-21, TC 88, WG 10, CDV. Measurements and Assessments of Power Quality Characteristics of Grid Connected Wind Turbines, 2001.
2. EN 50160. Voltage characteristics of electricity supplied by public distribution systems, 1994 and amendment 1997.
3. VDEW. Eigenerzeugungsanlagen am Mittelspannungsnetz, 1994 (revised 1998).
4. ANSI/IEEE std 1001–1988. IEEE Guide for Interfacing Dispersed Storage and Generation Facilities with Electric Utility Systems, 1988.
5. Engineering Recommendations for the connection of embedded generating plants G59/1, regional electricity companies distribution systems — 1990, G75, public electricity suppliers, above 5MW, 20kV — 1995