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An inverter-based resource (IBR) is a source of electricity that is asynchronously connected to the electrical grid via an electronic power converter ("inverter"). The devices in this category, also known as converter interfaced generation (CIG), include the variable renewable energy generators (wind, solar) and battery storage power stations. [1]
As of July 2018, South Africa had a coal power generation capacity of 39 gigawatts (GW). [2] South Africa is the world's 14th largest emitter of greenhouse gases. [2] South Africa is planning to shift away from coal in the electricity sector and the country produces the most solar and wind energy by terawatt-hours in Africa. [3]
A power inverter, inverter, or invertor is a power electronic device or circuitry that changes direct current (DC) to alternating current (AC). [1] The resulting AC frequency obtained depends on the particular device employed. Inverters do the opposite of rectifiers which were originally large electromechanical devices converting AC to DC. [2]
South Africa's energy crisis (or load shedding) is an ongoing period of widespread national blackouts of electricity supply. It began in the later months of 2007 towards the end of Thabo Mbeki 's second term as president, and continues to the present.
The doubly fed generator rotors are typically wound with 2 to 3 times the number of turns of the stator. This means that the rotor voltages will be higher and currents respectively lower. Thus in the typical ±30% operational speed range around the synchronous speed, the rated current of the converter is accordingly lower which leads to a lower ...
Seal pups are weaned from their mothers in a matter of weeks after birth. ©Nicram Sabod/Shutterstock.com