Statcom and load tap changing transformer (LTC) in Newton Raphson Power Flow: Bus voltage constraint and losses

Okyere, H.; Nouri, Hassan; Moradi, Hojjatullah; Li, Zhenbiao

doi:10.1109/upec.2007.4469089

Cited by 8 publications

(4 citation statements)

References 18 publications

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“…The stepwise calculation procedure to solve the power flow issue by applying the Fast Decoupled Power Flow Method is as given in [3] and as summarized thus: Creation of the node admittance Y as indicated by the lines given by the IEEE standard node test system, identification of all kinds of nodes according to the IEEE standard and setting all node initial value of u p.…”

Section: A Formulation For Fast Decoupled Power Flow Methodsmentioning

confidence: 99%

“…Availability of adequate electrical energy supply is an indispensable enabler for the social-economic advance of any nation [1,2]. Several numeral of resourceful and dependable power flow solution techniques, like, Gauss-Seidel (GS), Newton-Raphson (NR), Fast Decoupled Load Flow (FDLF), and so on were reviewed as in [3,4]. In an earlier era and now, they were widely and excellently used for network analysis, operation, control, and planning.…”

Section: Related Workmentioning

confidence: 99%

“…Though, these comprehensively useful programs may experience convergence complexities with radial distribution networks when many nodes are to be resolved [5][6][7] and, thus, development of a special program (SP) becomes crucial for distribution study. The result formulation and procedure may be accurate or estimated, with balanced values anticipated for either on-line or detached on line use, and intended to be applied for either single-case several-case assessments [3,8]. The load flow methodology is a key device in application programming for the network distribution management.…”

Section: Related Workmentioning

confidence: 99%

See 2 more Smart Citations

Load Evaluation with Fast Decoupled-Newton Raphson Algorithms: Evidence from Port Harcourt Electricity

Chinweoke¹,

Christopher²

2020

Adv. sci. technol. eng. syst. j.

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The undulated power supply has dropped to its worst reliability index in most parts of the city despite the installations of distribution transformers to improve the power. In this work, examination of Port Harcourt Town Zone 4 (Z4), Rivers State power distribution system forcing on its operation, planning for future expansion of the system, and sharing of power between utilities was done. The objective was to unravel the problematic recurrent blackouts as a result high power loss, that is (I 2 R) in the line; low voltage profile, poor cos∅ at the load end, excessive loading of feeder transformers, and conductors rating inadequacy at the receiving end of the 33KV Distribution part of the substation. A comprehensive study was carried out on the system with the formation of node admittance matrix. Programmable codes were written using MATLAB script to resolve the static power flow equations defined applying Fast decoupled-Newton Raphson calculation procedure centered on the advantages of time and PC memory space (PC-MS). Thus, the node voltage and the other variables like branch flows and phase angles were gotten, and network losses were reduced. However, the results obtained were compared with that gotten from Electrical Transient Analyzer Program (ETAP) application software. It was seen that the two results got were related. The general net power gotten was (129.741 MW, 83.818 MVAr) applying the Fast Decoupled-Newton-Raphson load flow technique in MATLAB programming environment after the addition of receptive power through the means of the capacitor bank to the affected nodes. The total net power that is real and reactive got employing ETAP programming were (125.765 MW, 92.782 MVAr). The overall line losses were enhanced by 0.246 reductions. That is from (4.75MW, 10.05MVAr) to (3.58MW, 7.57MVAr) of the entire real power losses.

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Section: A Formulation For Fast Decoupled Power Flow Methodsmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

See 1 more Smart Citation

Load Evaluation with Fast Decoupled-Newton Raphson Algorithms: Evidence from Port Harcourt Electricity

Chinweoke¹,

Christopher²

2020

Adv. sci. technol. eng. syst. j.

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“…Güç sistemlerinde bulunan yük altında kademe değiştiren kademe ayarlı transformatörler, kademe değişimine bağlı olarak sistemdeki reaktif güç akışı ve gerilim kontrolü için kullanılmaktadır. Yapıları itibariyle bu transformatörlere ait kademe ayarı değiştiğinde eşdeğer devrelerine ait seri ve şönt admitans değerleri değişir [1][2][3]. Bu durum, kademe ayarlı transformatörün bağlı olduğu tüm güç sistemine ait bara admitans yapısını değiştirerek, sistemdeki tüm aktif ve reaktif güç akışını etkiler.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Inserting the tap values of the tap changer transformers into the Jacobian matrix as control variables

Yalçın¹,

Arifoğlu²

2013

SAUFBE Derg

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Yük altında kademe değiştiren kademe ayarlı transformatörlere ait eşdeğer seri ve şönt admitans değerleri kademe değişimine bağlı olarak değer değiştirirler. Bu durum, bara admitans matrisi yapısını değiştireceğinden, güç akışı çalışmalarında, her kademe değişimi durumunda bara admitans matrisinin yeniden oluşturulmasını zorunlu kılar. Bu çalışmada, kademe ayarlı transformatörlerin kademe değişim etkilerini Jacobian matrise sokan yeni bir yaklaşım önerilmiştir. Önerilen yaklaşım ile, güç akışı çalışmalarında her kademe değişiminden sonra bara admitans matrisinin yeniden oluşturulması zorunluluğu ortadan kaldırılmıştır. Böylece güç akışı algoritmasının yakınsaması hızlandırılmıştır. Literatürde bu amaca yönelik benzer çalışmalar bulunmasına rağmen, bu çalışmalardan farklı olarak önerilen çalışma ile, aynı baraya birden çok ve farklı kombinasyonlarda kademe ayarlı transformatör bağlanması durumunda kademe değişim etkilerinin Jacobian matrise dahil edilmesi sağlanmıştır. Bu amaçla yeni güç denklemleri ve yeni Jacobian matris elemanı hesaplama denklemleri elde edilmiştir. Önerilen yaklaşım IEEE 57 baralı test sistemine uygulanmış ve doğruluğu ispatlanmıştır.

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Optimal Placement of Distributed Energy Resources in a DC Microgrid with Constant Power Loads to Minimize Bus Voltage Deviations and Line Losses

Hussain

Agarwal

2019

2019 1st Global Power, Energy and Communication Conference (GPECOM)

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Statcom and load tap changing transformer (LTC) in Newton Raphson Power Flow: Bus voltage constraint and losses

Cited by 8 publications

References 18 publications

Load Evaluation with Fast Decoupled-Newton Raphson Algorithms: Evidence from Port Harcourt Electricity

Load Evaluation with Fast Decoupled-Newton Raphson Algorithms: Evidence from Port Harcourt Electricity

Inserting the tap values of the tap changer transformers into the Jacobian matrix as control variables

Optimal Placement of Distributed Energy Resources in a DC Microgrid with Constant Power Loads to Minimize Bus Voltage Deviations and Line Losses

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