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Sundar, G.
- Grid Connected Boost-Full-Bridge Photovoltaic Microinverter System Using Phase Opposition Disposition Technique and Maximum Power Point Tracking
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Source
International Journal of Innovative Research and Development, Vol 3, No 1 (2014), Pagination:Abstract
This paper presents a novel grid-connected boost-full-bridge photovoltaic (PV) micro-inverter system and its control implementations. The concept of micro-inverter is a future trend for grid connected Photovoltaic micro-inverter. Increasing demand on the renewable energy sources has made the grid connected inverter systems to be more important than ever before. Maximum Power Point Tracking (MPPT) technique is implemented which is used by the grid connected inverters to get the maximum power from one or more photovoltaic device, typically solar panels. The Z source network is used to get the steady state. Interleaving of the Boost DC-DC converter is carried out to get more boosts up the voltage and better efficiency. A new multilevel inverter topology constituting of an H-bridge structure with four switches connected to the DC link. Based on Phase Opposition Disposition technique a new PWM method requires only one carrier signal is suggested.
Keywords
Boost-Full-Bridge, Grid-connected photovoltaic (PV) system, Incremental Conductance (IncCond), Maximum Power Point Tracking (MPPT), Photovoltaic micro-inverter, Phase Opposition Disposition technique (POD)Full Text
- Deciding Optimal Location for Placing FACTS Devices [UPFC, IPQC, DPFC] Using Bang-Bang Control Technique
Authors
Source
International Journal of Innovative Research and Development, Vol 3, No 1 (2014), Pagination:Abstract
There are many problems arising in the electricity networks. In that, voltage fluctuation and power loss reduction becomes a major drawback in the electrical power supply system. Hence it is necessary to enhance the system power flow by placing suitable facts devices. Hence, the placement of FACTS devices in suitable location can lead to control in-line flow and maintain bus voltages in desired level and reduce the losses. The facts devices like Upfc, Ipqc, Dpfc are compared with each other, and the higher efficiency converter is identified. Finally, the location for better efficiency is traced out. The unique control capability of the UPFC is given by the back-to-back connection between the shunt and series converters, which allows the active power to freely exchange. UPFC has a DC link, whereas DPFC does not have any DC link. It is connected directly to the transmission line so the hysteresis loss is controlled. Optimal location and better efficiency of UPFC, IPQC and DPFC are found out and the devices are placed at the exact location. This project presents one of the Bang-Bang Controller to seek the optimal location of FACTS devices in a power system Proposed algorithm is tested on IEEE 14 bus power system for optimal location of multi-type FACTS devices and the results are presented.
Keywords
Bang-Bang control technique, Distributed Power Flow Controller (DPFC), FACTS (Flexible AC Transmission System), Improved Power Quality Controller (IPQC), optimal location, Unified Power Flow Controller (UPFC)Full Text