Hello Steemians!!!
Hope you all are doing well and enjoying the bounties of life.Today i am gonna start a new electrical engineering related course with you guys.The course is about "Distributed generation" and today is the first lecture about.
Introduction :
- According to new technology, the electric power generation trend uses disbursed generator sized from kW to MW at load sites instead of using traditional centralized generation units sized from 100MW to GW and located far from the loads where the natural resources are available.
- Distributed generation (DG) is not a new concept but it is an emerging approach for providing electric power in the heart of the power system. It mainly depends upon the installation and operation of a portfolio of small size,compact, and clean electric power generating units at or near an electrical load (customer).
Distributed Generation Types :
Advantages of Micro-Turbines :
- Unlike the traditional combustion turbines, MTs run at less temperature and pressure and faster speed (100,000 rpm).
- They can be installed on-site especially if there are space limitations. Also they are compact in size and light in weight with respect to traditional combustion engines.
- They are very efficient (more than 80%) and have lower emissions (less than 10 ppm – parts per million NOx) with respect to large scale ones.
- They have well-known technology and they can start-up easily, have good load tracking characteristics and require less maintenance due their simple design
- They have lower electricity costs and lower capital costs than any other DG technology costs.
- They have a small number of moving parts with small inertia not like a large gas turbine with large inertia.
- Modern power electronic interface between the MT and the load or grid increases its flexibility to be controlled efficiently .
Micro-Turbines Operation :
- There are different types of MTs according to their operation such as gas turbines and combustion turbines.
- Gas turbines are combustion turbines that produce high temperature and pressure gas.
- This high-pressure gas is used to rotate turbine shaft, which drives a compressor, an electric alternator and generator. Gas turbines are always used above 1MW, but nowadays we can generate electricity through small modular with a micro-gas turbine of 200kW size.
- The produced heat can be used as a waste heat recovery to generate steam for compound heat and power (CHP) in combined cycle application and fuel cell/turbine hybrids applications.
Hope you like the article and if you do please
