Control and Real-Time Validation for Convertible Static Transmission Controller Enabled Dual Active Power Filters and PV Integration

This paper proposes a versatile convertible static transmission controller, in shunt-shunt mode, with dual active filters and photovoltaic (PV) power integration. The combined system aims to back up and control the power of a transmission transformer, as well as, improve the transmitted power quality to meet the grid standards and codes, especially the recently revised IEEE 1547 standards. The filters are also designed to eliminate the current and voltage harmonics due to the fluctuation in the injected PV power and the use of the switching power converters. A new reference generation technique is proposed to inject the solar power into the grid and compensate the system reactive power and harmonics. Moreover, the varying nature of PV power, due to the intermittent solar radiation and temperature, is accounted with the online computation of the dc voltage and power references with the help of the system rectifier. A simulation study adopted by real-time digital simulator is used to validate the proposed system for the integration of an actual solar PV under normal and faulted conditions.