Ambrish Chandra

Presentations:

Hybrid Renewable Energy Standalone Systems

Several isolated areas in the world currently use only diesel generators (DGs) to serve their requirements of electrical energy. However, the use of DGs has many drawbacks: 1) high cost of electricity, 2) air and noise pollution, 3) Loss in fuel efficiency and maintenance cost. To remedy those problems it is better to generate power from a cost-effective, environmental friendly renewable energy sources (RESs) such as wind, solar, hydro, biomass, etc. RESs are clean and almost available all over the planet but are intermittent in nature, especially wind and solar power generations. This makes their integration to micro-grid with DG difficult, especially if the local grid is not connected to the main grid. Hybrid standalone system consists of many elements such as photovoltaic panels, wind turbines, DG, energy storage system, AC and DC loads, dump load etc. Most of these elements are connected to the AC or DC bus via power electronic devices. In this presentation many possible hybrid renewable energy standalone systems will be discussed. Control of some of the systems will be discussed in detail.

Electrical Energy Situation and Microgrid Projects in Canada

Renewable energy generation in Canada is different from other countries around the world. Present energy scenario in Canada will be discussed with efforts being made to integrate renewables with the grid. Several isolated areas in the North of Canada currently use only diesel generators to serve their requirements of electrical energy. Efforts are being made to integrate renewables to reduce the pollution and the consumption of diesel to reduce the cost of electricity generation for isolated communities.

Recent Advancements in Power Quality based Controllers with Grid Integration of Renewable Energy Sources

Modern power distribution systems face twin challenges of increased use of power electronic based loads and integration of renewable energy systems. These power electronic devices cause current based power quality problems in distribution systems. Prominent power quality problems include poor power factor, load unbalancing, harmonics in supply current, voltage regulation etc. Several controllers are designed to achieve this task. Renewable Energy integration of grid connected sys-tems plays a crucial role and serves dual purpose of bidirectional active power transfer to the grid and load and can be controlled to achieve grid current balancing, harmonic reduction, reactive pow-er balance and improve the supply side power factor to unity. The interfacing of renewable energy sources with the grid connected system takes place at the Point of common coupling (PCC) with the help of Voltage source converter. Non-Linear Loads are also connected at PCC. These power electronic based loads are increasing day by day due to their com-pactness and efficiency. They inject harmonics into the grid, draw reactive power which deteriorate the power quality and increase the losses. To overcome the above problems power quality-based converters and controllers are designed and controlled to perform power factor correction, reactive power compensation and harmonic mitigation. Various IEEE and IEC based international standards are recommended to improve the quality of power in distribution systems. Harmonic mitigation in grid currents should follow IEEE-519 standard. It is measured in terms of Total Harmonic Distor-tion Factor in grid current which should be less than 5% as per IEEE-519 standards. Moreover IEEE-1547 standard discusses the harmonic content in grid connected systems with distributed en-ergy resources. Power Quality based controllers with grid integration of Renewable Energy sources: Design, Miti-gation techniques and their Performance Analysis at the distribution level will be a beneficial re-source for researchers and graduate students in encouraging their efforts in this crucial field of monitoring power quality with integration of renewable technology research.