Super Decoupled Loadflow With Distributed Slack Bus

Haley, Paul; Ayres, Mark

doi:10.1109/tpas.1985.318883

Cited by 43 publications

(10 citation statements)

References 8 publications

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“…However, it has been shown to have failed to converge to a solution when FDL converged [3]. The transformation or super decoupled approach [4], [5] is mathematically sound and therefore, more general and reliable. Rotation operators applied to the complex node injections and corresponding admittance values that relate them to the system state variables, transform the network equations such that branch admittances appear to be almost entirely reactive.…”

Section: Introductionmentioning

confidence: 99%

Super Super decoupled Loadflow

Patel¹

2009

2009 IEEE Toronto International Conference Science and Technology for Humanity (TIC-STH)

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A generalized Super Super decoupled Loadflow referred to as SSDL-X'X' method is presented along with its special case manifestations leading to the proposed SSDL-YY method. Gain matrices of the SSDL-YY method are defined independent of rotation angles and they differ only in their diagonal terms. The diagonal terms in the gain matrix of Q-V sub-problem are characterized by the presence of transformed specified/known quantities. Rotation angles are limited to the maximum value of -48°, and the slack-start as a guess solution is suggested for increased efficiency. These along with simple modification of real power mismatches at PV-nodes yields a robust and fast loadflow method. An advanced version of the General-purpose Fast Decoupled Loadflow (GFDL) is manifested as SSDL-BX method. The proposed method is tested and compared with Fast Super Decoupled Loadflow (FSDL), SSDL-BX, and GFDL methods under wide range of simulated system operating conditions and network parameters. The proposed method is superior to the FSDL method under all most all conditions and can be more than twice faster than the SSDL-BX, and GFDL methods for systems having large R/X ratio branches.

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Section: Introductionmentioning

confidence: 99%

Super Super decoupled Loadflow

Patel¹

2009

2009 IEEE Toronto International Conference Science and Technology for Humanity (TIC-STH)

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“…The super-decoupled loadflow with distributed slack busbar (super-dec) method has recently been presented [1] as a more attractive alternative for computing loadflow solutions of power systems. Since its emergence, this method has not been widely received by the general power-system worker, primarily because not many of its capabilities have been investigated.…”

Section: Introductionmentioning

confidence: 99%

“…The loadflow programs developed are as described in the respective References [1,3]. For the outage simulation part, the principle used is the current-injection method as explained in Reference 3.…”

Section: Introductionmentioning

confidence: 99%

On the performance of the super-decoupled technique

Jasmon¹,

Choy²

1987

IEE Proc. C Gener. Transm. Distrib. UK

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The super-decoupled loadflow with distributed slack busbar is the most recent loadflow technique to be developed. The paper compares the performance of this new technique with that of established loadflow techniques, i.e. the fastdecoupled loadflow and the 2nd-order Newton Raphson methods, and several striking observations are made. The performance of these three methods with respect to outage simulation is also presented.

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“…높은 R/X비율의 송전선들을 가지고 있는 시스템에서 FDL의 수렴성능을 향상시키기 위해 직병 렬 보상 (series and parallel compensation) [5], super-decoupling [6], 그리고 를 무시하지 않고 반 영하여 R/X비가 높은 계통에서 우수한 수렴특성을 개선하였다 [7]. ″을 사용하지 않아 수렴속도가 기 존 FDL 보다 50% 빠른 조류계산 모델을 개발 [8], 선로저항을 ′ 에는 반영하고 ″ 에는 반영하지 않아 수렴시간을 줄이며 [9], R/X비가 높은 계통에서   계산에 를 반영하여 수렴성능을 개선하는 …”

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Research on the Improvement of Convergence Characteristics of the Fast Decoupled Load Flow

Lee¹

2012

Journal of the Korean Institute of Electrical and Electronic Ma

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In this paper, we propose useful load flow algorithms called FEDL (fast enhanced decoupled load flow). The proposed load flow method can improve the convergence characteristics particularly when the P-Q coupling becomes significant and the power system operating states deviate from the conditions required for stable convergence of the FDL by reflecting in part the effects of the off-diagonal terms in the Jacobian. In our test with IEEE AEP-30 bus system and RTS-96 73-bus system, it converge even when the fast decoupled load flow (FDL) and its variations keeping load flow matrices constant experience convergence problems. Test results show promising performances of the proposed algorithms in their convergence characteristics both in number of iterations and overall convergence speeds.

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Super Decoupled Loadflow With Distributed Slack Bus

Cited by 43 publications

References 8 publications

Super Super decoupled Loadflow

Super Super decoupled Loadflow

On the performance of the super-decoupled technique

Research on the Improvement of Convergence Characteristics of the Fast Decoupled Load Flow

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