In a generation scheduling problem, the load demand has to be satisfied but in a deregulated environment, GENCOs no longer have an obligation to satisfy the load demand.
So, how is the system reliability maintained in those hours when total generation is not equal to load demand?
Dear Prateek,
In the deregulated environment (or in restructured power systems), not only the load demand is absolutely satisfied but also it is an obligatory as we had before.
In the restructured power systems, Independent System Operator (ISO) must maintain the reliability, although GENCOs no longer have an obligation to satisfy the load demand. In other words, the same as what we had in the traditional or monopoly power systems, now ISO should perform system security monitoring functions and redispatch generation as necessary to eliminate real-time transmission congestion and to maintain system reliability, including taking all necessary emergency actions to maintain the security of the system in both normal and abnormal operating conditions.
But, in this structure, GENCOs can participate in the electricity market and submit their offers in order to compete with other rivals and sell more energy. Market Operator (MO) (or sometimes ISO) has the role of running the electricity market such that total supply meets system demand. It is done using an auction.
I recommend you study the worthwhile book of Professor Shahidehpour for more details.
Meanwhile, load shedding is not a good choice because it is the last resort. In a competitive environment, we have another concept namely Demand Response (DR) which is different from load shedding. It has economic aspects and it is beneficial especially for the reliability issues.
I hope this brief answer could be helpful for your research.
Regards,
Morteza Shabanzadeh
http://mortezash.blogfa.com/
Priority based load shedding should be implemented, keeping distribution reliability along with efficiency same. I developed a ' Microprocessor based load shedding controller........' when demand is more than generation considering, equal incremental cost, panelty factor etc., refer my paper. Revanue(earning) can be increased in such case.
Dear Prateek,
In the deregulated environment (or in restructured power systems), not only the load demand is absolutely satisfied but also it is an obligatory as we had before.
In the restructured power systems, Independent System Operator (ISO) must maintain the reliability, although GENCOs no longer have an obligation to satisfy the load demand. In other words, the same as what we had in the traditional or monopoly power systems, now ISO should perform system security monitoring functions and redispatch generation as necessary to eliminate real-time transmission congestion and to maintain system reliability, including taking all necessary emergency actions to maintain the security of the system in both normal and abnormal operating conditions.
But, in this structure, GENCOs can participate in the electricity market and submit their offers in order to compete with other rivals and sell more energy. Market Operator (MO) (or sometimes ISO) has the role of running the electricity market such that total supply meets system demand. It is done using an auction.
I recommend you study the worthwhile book of Professor Shahidehpour for more details.
Meanwhile, load shedding is not a good choice because it is the last resort. In a competitive environment, we have another concept namely Demand Response (DR) which is different from load shedding. It has economic aspects and it is beneficial especially for the reliability issues.
I hope this brief answer could be helpful for your research.
Regards,
Morteza Shabanzadeh
http://mortezash.blogfa.com/
Nice and detailed answer Morteza Shabanzadeh. a small addition to this can be;
The deregulated system is more like a market where buyers and sellers have to coordinate. GENCO ultimately have to sell their generation to DISCOMS. and in tern DISCOMs have to keep an eye on Load scheduling.
the coordination between the two is the only alternative.
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