Analysis and design of a three-phase PLL structure for utility connected systems under distorted utility conditions This paper presents a new phase detecting method by using a digital three-phase PLL (phase locked loop) system for utility- connected devices under distort... S Da,AO S.,Coelho,...
Different PLL implementation structures and their major characteristics are pointed out. The primary application of the proposed synchronization method is for the distributed generation units with renewable energy sources, which utilize power electronic converters as an integral part of their systems. T...
connectedconverters,phaselockedloop(PLL),positivesequencesignalsdetection,synchronousreferenceframe(SRF).I.INTRODUCTIONONEofthemostimportantaspectstoconsiderinthecontrolofgrid-connectedpowerconvertersisthepropersynchronizationwiththeutilityvoltages.Specifically,thedetectionofthepositive-sequencevoltagecomponentatfun-da...
INTRODUCTIONOsynchronization with the utility voltages. Specifically, thedetection of the positive-sequence voltage component at fun-damental frequency is essential for the control of distributedgeneration and storage systems, flexible ac transmission sys-tems (FACTS), power line conditioners and ...
single-phase NE of the most important aspects to consider in the PLL for each phase of the system [12], [13], allowing the estima- Ocontrol of grid-connected power converters is the proper tion of frequency and in-phase and quadrature-phase waveforms synchronization with the utility voltages...
This is naturally a highly desirable feature for the control of power electronics systems applied to wind generators [2], especially when these generators work in island mode or are connected to weak grids. In order to experimentally evaluate the behavior of the DDSRF-PLL when the utility ...
Yamano, Development of a new utility-connected photovoltaic inverter LINE BACK, Proc. of the 16th international telecommunications energy conference (INTELEC'94), 1994, 676-682. [7] Y.-T. Hsiao, C.-H. Chen, Maximum power tracking for photovoltaic power system, IEEE proc. of the 37th ...
The integration of distributed energy resources (DERs) in modern power systems has substantially changed the local control capabilities of the grid since the majority of DERs are connected through a controlled dc/ac inverter interface. Such long-distance located DER installations, usually represented by...