A mathematical model for the loadability analysis of a simultaneous AC–DC power transmission system

Alam, Mohammad Tawhidul; Ahsan, Q.

doi:10.1007/s00202-017-0670-8

Cited by 5 publications

(5 citation statements)

References 7 publications

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“…The main purpose of simultaneous AC-DC system is to improve loadabiliy and stability both. The equations ( 1) and (3) present the expressions of loadability [15] and stability [16], respectively.…”

Section: Proposed Modelmentioning

confidence: 99%

“…At the highest point of DC voltage mix (49.5%) the optimal operation gives 61.87% and 49.71% of loadability and stability improvements respectively. Note that, in simultaneous AC-DC system the DC voltage mix must be less than 50% of original AC voltage [15].…”

Section: Application Of the Analytical Model Of Optimal Pointmentioning

confidence: 99%

“…Using the mathematical model, the limiting values of the variables of any system can be determined for which the improvement in loadability is just marginally possible. From the numerical analysis of [15] it is seen that the power flow increases with the increase of voltage mix and transmission angle.…”

Section: Introductionmentioning

confidence: 97%

“…An appropriate mathematical model is developed in [15] for the loadability analysis of simultaneous AC-DC system. In this model, AC and DC power of AC-DC system are expressed in terms of AC power flow of original AC system.…”

Section: Introductionmentioning

confidence: 99%

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An Analytical Approach for the Optimal Operation of Simultaneous AC-DC Power Transmission System

Alam

Ahsan

2020

IJEEI

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Simultaneous AC-DC power transmission technique can improve both loadability and stability of a power system with long transmission line. But, there is a tradeoff between loadability and stability, i.e. increase in the improvement of loadability causes the decrease in the improvement of stability and vice versa. Actually, it is a multi-objective optimization problem where the objective function depends on two decision variables with opposite in nature. Firstly, this paper presents an analytical expression for the objective function which is the function of two decision variables; power flowing capacity and critical clearing time. Secondly, a mathematical model is developed for the optimal point of the objective function. Considering a typical system a numerical analysis is performed using the proposed expressions. Again, the impacts of the line length and the voltage level of a transmission line on the objective function are also investigated. Finally, the developed model of the optimal point is validated to judge its accuracy and applied to a real system to justify its ability to evaluate the combined benefit of loadability and stability of simultaneous AC-DC system.

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Section: Proposed Modelmentioning

confidence: 99%

Section: Application Of the Analytical Model Of Optimal Pointmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Analytical Approach for the Optimal Operation of Simultaneous AC-DC Power Transmission System

Alam

Ahsan

2020

IJEEI

Self Cite

View full text Add to dashboard Cite

show abstract

“…In order to meet the national optimal allocation of resources, reasonably distributed electric energy [1,2], and realized large-scale transmission of electricity from the north to the south, from the west to the east, water and fire, and national networking [3], the long-distance and large-capacity power transmission mode has became the development direction of the optimal allocation of resources in China, and the advantages of high-voltage transmission lines are increasingly obvioused [4,5]. Today, highvoltage AC and DC transmission lines are complemented and supported each other, promoted the construction of a strong power grid, and promoted the rational allocation of resources and the optimization of energy structure [6,7].…”

Section: Introductionmentioning

confidence: 99%