By Muhammad H. Rashid
This new source is a realistic evaluation of designing, checking out and troubleshooting strength electronics in substitute strength structures, giving you an important info on how strength electronics elements resembling inverters, controllers and batteries can play a pivotal function within the winning implementation of eco-friendly strength recommendations for either stand-alone and grid-connected functions. you'll how one can decide on the correct parts for varied structures, from utility-scale wind farms to photovoltaic panels on unmarried apartments, easy methods to get the main out of present platforms, and the way to unravel the cruel demanding situations specific to substitute power functions. no matter if you're a renewables specialist who must comprehend extra approximately how strength electronics influence strength output, or an influence engineer who's attracted to studying what new avenues the choice power revolution is establishing on your paintings, commence the following with suggestion and reasons from the specialists, together with equations, diagrams and tables designed that will help you comprehend and succeed.
- Provides a radical assessment of the most important applied sciences, tools and demanding situations for imposing strength electronics in replacement strength structures for optimum strength generation
- Includes hard-to-find info on the way to follow converters, inverters, batteries, controllers and extra for stand-alone and grid-connected systems
- Covers wind and sunlight purposes, in addition to ocean and geothermal power, hybrid structures and gasoline cells
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Extra resources for Alternative Energy in Power Electronics
Vertical axis wind turbines (VAWTs) have an axis of rotation that is vertical, and so, unlike the horizontal wind turbines, they can capture winds from any direction without the need to reposition the rotor when the wind direction changes (without a special yaw mechanism). Vertical axis wind turbines were also used in some applications as they have the advantage that they do not depend on the direction of the wind. It is possible to extract power relatively easier. But there are some disadvantages such as no self starting system, smaller power coefficient than obtained in the horizontal axis wind turbines, strong discontinuation of rotations due to periodic changes in the lift force, and the regulation of power is not yet satisfactory.
The utilities are more inclined with large scale, centralized power supply. The PV systems can be centralized or distributed systems. Grid-connected PV systems must observe the islanding situation, when the utility supply fails. In case of islanding, the PV generators should be Power Electronics for Renewable Energy Sources Chapter | 1 33 disconnected from mains. PV generators can continue to meet only the local load, if the PV output matches the load. If the grid is re-connected during islanding, transient overcurrents can flow through the PV system inverters and the protective equipments like circuit breakers may be damaged.
The maximum power tracking control is required in the control algorithm for solar application. The basic diagram for a single-phase line-commutated inverter is shown in the Fig. 33 . The driver circuit has to be changed to shift the firing angle from the rectifier operation (0 < φ < 90) to inverter operation (90 < φ < 180). Six-pulse or 12-pulse inverter are used for the grid interfacing but 12-pulse inverters produce less harmonics. The thyristor type inverters require a low impedance grid interface connection for commutation purpose.
Alternative Energy in Power Electronics by Muhammad H. Rashid