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A novel method for optimum vector PWM (OVPWM) control of three-phase grid-connected photovoltaic inverter was described. The control vector and its corresponding action duration composed of the PWM sequences generated by optimum vector PWM strategy. A Differential Evolution (DE) algorithm was applied to determine the action duration of the output voltage vector based on conventional vector PWM (CVPWM)...
A concept of Digital Distribution Automation System (DAS) is present in this paper, and design of digital distribution automation and the construction model are analyzed. Applications of ECT/EVT, IEC 61850, local digital technology and fiber Ethernet communication in digital distribution automation are discussed; a program for practical Digital DAS is put forward to present ideas for future development.
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