(1) Are Distributed Generators(DGs) placed on transmission network for improved
ID: 2083687 • Letter: #
Question
(1) Are Distributed Generators(DGs) placed on transmission network for improved reliability? if yes,explain
(2) State 5 objective functions with their mathematical models and constraints for the optimal placement of DGs on distribution networks for improved reliability.
(3) Is it possible to use Improved Strength Pareto Evolutionary Algorithm(SPEA-2) to optimize Neuro-Fuzzy Logic for three area Load Frequency control? If Yes, please Explain and also give the mathematical model to achieving it with MATLAB/SIMULINK
Explanation / Answer
1. Yes distributed generators are placed in a network to improve the overall reliability of the power system. Conventional way of power generation includes large power plants such as thermal, nuclear or hydro power plants located at an isolated place from the load centre. Lets suppose there is only one set of generators feeding a particular area A in the network. If by any chance a fault arises in any of those set of genrators or for that matter fact in transmission lines feeding the area A the whole system would trip the area A would face a complete blackout.
Now suppose we have two different set of generators placed in the network at differnet places feeding this area A. Now suppose one of the set of generators face a problem and if it trips, area A still has the other set of generators feeding it. So the reliability of the network is not being compromised due to a fault in some of the system. This was just a simple example to explain the advantage of distributed generation.
This area A we are talking about can be a country, state, province whatever you can think of. Now if there are very large number of distributed generators like this feeding a large area such as a country say, the reliability of the whole system is greatly increased considering the amount of dependence electricity has these days.
This was just a simple example to explain the advantage of distributed generation. In general DG's are placed lot nearer to the load while feeding them and are connected to the grid also. Many such DG's connected together to the grid forms a microgrid. A microgrid with distributed generation localizes the impact of fault on a sytem and thus reducing the number of users getting effected.
Further, large amount of diatributed generators placed would eventually lead to loads being closer to the generators feeding it. This would again increase the reliability by decreasing the transmission and distribution losses and increasing the power quality of the system. Further it gives opportunities for electric utilities to use DG during peak load demand to meet the power demand and hence reducing load shedding. These factors also lead to an increase in the overall power system reliability.
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