4Li H J, Xu Y, Adhikari S, et al. Real and reactive power control of a three-phase single-stage PV system and PV voltage stability[C]. IEEE Power and Energy Society General Meeting, San Diego, CA, 2012: 1-8.
5Mohd A, Ortjohann E, Schmelter A, et al. Challenges in integrating distributed energy storage systems intofuture smart grid[C]. IEEE International Symposium on Industrial Electronics, Cambridge, 2008: 1627- 1632.
6Liu Y, Bebic J, Kroposki B, et al. Distribution system voltage performance analysis for high penetration PV[C]. IEEE Energy 2030 Conference, Atlanta, GA: 2008: 1-8.
7Verband Deutscher Elektrotechniker (VDE). Technical minimum requirements for the connection to and parallel operation with low-voltage distribution networks[S]. Berlin: Vde Verlag Gmbh, 2011.
8Braun M, Stetz T, Reimann T, et al. Optimal reactive power supply in distribution networks-technological and economic assessment for PV systems[C]. European Photovoltaic Solar Energy Conference and Exhibition, Hamburg, Germany, 2009: 3872-3881.
9Geibel D. Multi functional photovoltaic inverter systems-energy management and improvement of power quality and reliability in industrial environ- ments[C]. IEEE Energy Conversion Congress and Exposition, San Jose, CA, 2009: 3881-3888.
10Craciun B I, Man E A, Muresan V A, et al. Improved voltage regulation strategies by PV inverters in LV rural networks[C]. IEEE Power Electronics for Distributed Generation Systems (PEDG), Aalborg, 2012: 775-781.