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This paper shows a dc-bus voltage regulation for a dc distribution system integrated with a single-phase bidirectional inverter through using a control method to operate with no grid information, and without contributing the solar DC-DC converter. This system can intelligently and efficiently operate in islanding mode when load shedding is employed to regulate the DC bus voltage with providing the...
This paper proposes a novel 3$\phi$ stand-alone solar photovoltaic (PV) system configuration that uses high-gain high-efficiency $(\approx\! 96\%)$ dc–dc converters both in the forward power stage and the bidirectional battery interface. The high-voltage-gain converters enable the use of low-voltage PV and battery sources. This results in minimization of partial shading and parasitic capacitance...
This paper proposes an electrolytic capacitor-less bi-directional EV charger for V2G and V2H operation. The dc-dc converter stage of the proposed EV charger is a non-regulating series resonant converter (SRC) which can be designed with minimum voltage and current rating and always achieves ZCS turn ON and OFF. The unified inner loop of the proposed control block provides seamless mode transfer for...
The development of transformerless 5 kW grid connected/offline bidirectional inverter simulation in PT. Len Industri is reported. The aim of transformerless is to reduce total cost and losses; making it more suitable for remote area application. The bidirectional inverter consist of two stage: bi-directional multiphase dc - dc converter and single phase inverter. Double PI control loop is used in...
This paper presents a bi-directional quasi-Z-source inverter (qZSI) based DC/DC converter for supercapacitor (SC) interfacing in high power applications. In the SC charging mode the proposed converter acts as a conventional VSI based step-down converter, but in the energy recovery mode it acts as a qZSI-based step-up DC/DC converter. The paper analyzes and discusses the operation of the converter...
This paper presents a new bi-directional DC/DC converter for supercapacitor interfacing in high-power applications. The converter acts as a VSI-based step-down DC/DC converter during the supercapacitor charging mode and as a qZSI-based step-up DC/DC converter during the energy recovery mode. To provide voltage matching and galvanic isolation the medium frequency transformer was implemented. To ensure...
The conventional battery energy storage system (BESS) has many limits due to weight, size and low energy utilization resulted from battery characteristics. To solve this problem, we proposed a grid connected peak-load compensation system with high discharging current characteristics based on lithium polymer battery for development of the next generation power station. The lithium-polymer battery has...
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