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1.

Thunderstorm Algorithm

A.N. Afandi
PPIJK, Japan (2016)

A.N. Afandi [Kumamoto University, Universitas Negeri Malang] (20 records)

Abstract
At the previous early time, Benjamin Franklin was demonstrated practically the lightning theory throughout an erected media while waiting for completion of the spire aimed his idea of a flying object using a kite. Furthermore, the conduction was conditioned while the string stretching out and a spark jumped in the rain during the storming soaked to the line. Nowadays, the lightning is supposed to contribute an atmospheric discharge which typically occurs during thunderstorms covered many possibility factors. In detail, the lightning development is produced by several steps in terms of the charge separation for providing the first process in the generation of lightning, the leader formation for the moving thundercloud over the earth’s surface to induce the ground charge follows the movement of the cloud, and discharge channel when the electric field becomes strong enough for creating a point of the striking between clouds and the ground. By considering the charge propagation as illustrated in Figure 1, the lightning process is electric discharges in the form of sparks in the which are charged with the negative pole location is deployed in the lower part and the positive pole centre is located at opposite up.

Full article

 
2.

Optimal Scheduling Power Generations Using HSABC Algorithm Considered A New Penalty Factor Approach

A.N. Afandi
ICPERE 2014 (2014)

A.N. Afandi [Kumamoto University, Universitas Negeri Malang] (20 records)

Abstract
Scheduling power generations are very important in power system operations to meet various combinations of generating units for providing electric energy in order to operate more economically for supplying power demands. This strategy is able to cover using a combined economic and emission dispatch (CEED) considered pollutant emission and fuel consumption aspects under operational constraints for optimizing the total operating cost. The pollutant production is embedded in the CEED using a penalty factor to become the same priority cost function. This paper introduces a new penalty factor approach for combining emission and economic dispatches solved using the latest intelligent computation. Results obtained on IEEE-62 bus system show different performances of previous and new penalty factor approaches. Moreover, the CEED is carried out in the similar result for the total power output. The time consumption, operating cost, and speed of the new approach are less than one others while obtaining the optimal solution.

Full article

 
3.

Optimal Solution of the EPED Problem Considering Space Areas of HSABC on the Power System Operation

A.N. Afandi
IJET (2015)

A.N. Afandi [Kumamoto University, Universitas Negeri Malang] (20 records)

Abstract
Recently, the emission problem and economic dispatch (EPED) becomes crucial aspects in the power system operation. These aspects are measured technically using financial payments as the total operating cost based on pollutant productions and fuel consumptions throughout individual costs of generating units based on a committed power output to meet a load demand. This paper introduces the newest artificial intelligent computation, harvest season artificial bee colony (HSABC) algorithm, for determining the optimal solution of the EPED based on the operating cost function using IEEE-62 bus system with various operational constraints. Results obtained show that HSABC has short time computations and fast convergences while space areas give different implications on performances. The optimal solution produces various individual power outputs, pollutants, and costs.

Full article

 
4.

Optimal Scheduling Power Generations Using HSABC Algorithm Considered A New Penalty Factor Approach

A.N. Afandi [Kumamoto University, Universitas Negeri Malang] (20 records)

Abstract
Scheduling power generations are very important in power system operations to meet various combinations of generating units for providing electric energy in order to operate more economically for supplying power demands. This strategy is able to cover using a combined economic and emission dispatch (CEED) considered pollutant emission and fuel consumption aspects under operational constraints for optimizing the total operating cost. The pollutant production is embedded in the CEED using a penalty factor to become the same priority cost function. This paper introduces a new penalty factor approach for combining emission and economic dispatches solved using the latest intelligent computation. Results obtained on IEEE-62 bus system show different performances of previous and new penalty factor approaches. Moreover, the CEED is carried out in the similar result for the total power output. The time consumption, operating cost, and speed of the new approach are less than one others while obtaining the optimal solution.

Full article

 
5.

HSABC Algorithm for Searching the Optimal Solution of CEED Problem Considering Uncontrolled Distance Placements

A.N. Afandi [Kumamoto University, Universitas Negeri Malang] (20 records)

Abstract
An economic power system operation is able to approach using a total operating cost of generating units. Technically, this problem is presented by a combined economic and emission dispatch (CEED) due to a total load demand. This paper presents performances of a novel intelligent computation, harvest season artificial bee colony (HSABC) algorithm, for obtaining the optimal solution of the CEED problem. Simulation results used IEEE-62 bus system show that HSABC has a smooth convergence and applicability for solving the CEED problem.

Full article

 
6.

The New Opportunity for Carrying Out a Dynamic Economic Dispatch using the Latest Evolutionary Computation Method

A.N. Afandi [Kumamoto University, Universitas Negeri Malang] (20 records)

Abstract
Practically, a power system is operated by combined various types of generating units for determining a committed power schedule to meet load demand changes at all period times of the operation in order to reach the most economical operation. The committed power schedule of generating units is obtained by allocating power outputs based on the given load demand at a certain period time for minimizing the total cost considered some constraints. The total cost changes of operation are expressed by dynamic economic dispatch (DED) problems with considering load demand changes for each period time of the operation. In this paper, the harvest season artificial bee colony (HSABC) algorithm is used to solve the DED problem for 24 hours of operating times using IEEE-30 bus system. Simulation results show thatthe best solution of the problem is obtained by HSABC within theshortest iteration step. The computations used load demand changes for all period times are quick and smooth with stable characteristics of convergences. The DED problem is solved using HSABC in different convergence speeds, power outputs and total operating costs for 24 hours.

Full article

 
7.

Transient Stability Evaluation of the Power Generation under a Blackout Condition based on the Branch Tripping Scenario

A.N. Afandi [Kumamoto University, Universitas Negeri Malang] (20 records)

Abstract
An operational condition of a power system is able to affect to stability performances after disturbed by a certain fault on the interconnection system. Moreover, this fault also gives impact to the blackout situation created by a large disturbance as disconnecting back bone lines of the interconnection system. In detail, this case is presented in this paper for evaluating transient stability performances of generating units while producing energy for the load center online the power system operation with the blackout situation designed using a branch tripping method. Furthermore, the transient stability responses are subjected to the power generation of the electric power system in Malang Raya as a real system operation for interacting the generating and demand sites. Results obtained show that voltage changes of Wlingi power station is 0.944 pu to 0.946 pu and its overshoot is 0,962. But the other overshoot of the power generation in Sutami remained to 0.968 pu at 0.5 second after appearing a blackout fault and its voltage increase to 0.952 pu from 0.948 pu at the final stable position.

Full article

 
8.

Optimal Solution of the EPED Problem Considering Space Areas of HSABC on the Power System Operation

A.N. Afandi [Kumamoto University, Universitas Negeri Malang] (20 records)

Abstract
Recently, the emission problem and economic dispatch (EPED) becomes crucial aspects in the power system operation. These aspects are measured technically using financial payments as the total operating cost based on pollutant productions and fuel consumptions throughout individual costs of generating units based on a committed power output to meet a load demand. This paper introduces the newest artificial intelligent computation, harvest season artificial bee colony (HSABC) algorithm, for determining the optimal solution of the EPED based on the operating cost function using IEEE-62 bus system with various operational constraints. Results obtained show that HSABC has short time computations and fast convergences while space areas give different implications on performances. The optimal solution produces various individual power outputs, pollutants, and costs.

Full article

 
9.

Flexible Cu(In,Ga)Se2 solar cells fabricated using a polyimide-coated soda-lime glass substrate

Adiyudha Sadono, Masashi Hino, Mitsuru Ichikawa, Kenji Yamamoto, Yasuyoshi Kurokawa, Makoto Konagai, and Akira Yamada
Japanese Journal of Applied Physics (2015)

Adiyudha Sadono (1 records)

Abstract
Flexible solar cells with a Cu(In,Ga)Se2 (CIGS) absorber layer were fabricated on a polyimide thin film using a lift-off process. Polyimide-coated soda-lime glass (SLG) was used as a substrate for fabricating CIGS solar cells before the lift-off process conducted to make the cells flexible. A conversion efficiency of 13.4% was achieved by low temperature deposition; this value is comparable to that obtained by direct deposition on a rigid glass substrate even without an external Na source. The final conversion efficiency after the lift-off process was 12.7% with some area correction due to the partial peeling-off between CIGS and Mo. Open-circuit voltage and fill factor did not change before and after the lift-off process, suggesting that the lift-off process did not give any physical damage.

Full article

 
10.

Plutonium Utilization in FUJI-U1 Molten Salt Reactor

Cici Wulandari, Indarta Kuncoro Aji, Syeilendra Pramuditya, Sidik Permana, and Abdul Waris*
The 6th Asian Physics Symposium (2015)

Syeilendra Pramuditya (11 records)

Abstract
Molten salt reactor (MSR) design has been elected as one of the Generation IV nuclear energy systems, since it has many advantages such as safety improvement, proliferation resistance, resource sustainability, and ability to be used for hydrogen production. MSR has no chance for high power surges due to online refueling and small excess reactivity, which in turn enhances the safety aspect of MSR. Natural Thorium (232Th) can undergo the radiative capture reaction to generate the artificial fissile nuclide 233U after successive beta decays. Thorium - 233U fuel cycle will produce 232U, a 2.6 MeV gamma emmiter. These later two aspects provide the resource sustainability and the proliferation resistance advantages of MSR. FUJI-U1 is an MSR with 450 MWth of power output and 44.4% of thermal efficiency. The basic design of FUJI-U1 reactor utilizes ThF4-UF4 as a fuel composition. In this study, ThF4-PuF4 will be used instead of ThF4-UF4. SRAC 2006 code with JENDL 3.3 will be employed in the neutronics calculation.

Full article

 

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