Post-contingency equilibrium analysis techniques for power systems

Yeu, Rodney; Sauer, W.

doi:10.1109/naps.2005.1560548

Cited by 8 publications

(5 citation statements)

References 4 publications

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“…LOLP adalah kemungkinan sistem tidak dapat memasok energi listrik ke pelanggan. LOLP kurang dari 0,274% berarti sistem hanya diperbolehkan tidak dapat memasok energi listrik ke pelanggan maksimal 1 hari/tahun [1][2][3][4][5].…”

Section: Pendahuluanunclassified

Pemodelan Perhitungan Indeks Lost of Load Probability untuk N Unit Pembangkit pada Sistem Kelistrikan Opsi Nuklir

Budi

Birmano

Bastori

2018

Jurnal Pengembangan Energi Nuklir

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Perhitungan LOLP dapat dilakukan secara manual ataupun dengan bantuan program. Perhitungan secara manual membutuhkan waktu yang lebih lama dan ketelitian dibandingkan dengan menggunakan bantuan program. Tujuan penelitian ini adalah untuk membuat sebuah model perhitungan indeks LOLP yang lebih sederhana, fleksibel (dapat digunakan untuk N jumlah pembangkit), dan waktu perhitungan yang lebih cepat. Program perhitungan LOLP menggunakan bantuan program Matlab. Penelitian dilakukan dengan langkah sebagai berikut: pembuatan source code pada Matlab, perhitungan indeks LOLP dengan data masukkan yang digunakan, dan validasi hasil perhitungan. Validasi dilakukan dengan cara bencmarking terhadap hasil perhitungan penelitian sebelumnya. Hasil penelitian menunjukkan bahwa model perhitungan indeks LOLP untuk N unit pembangkit pada sistem kelistrikan opsi nuklir telah berhasil dibuat dengan mempertimbangkan aspek kesederhanaan data masukkan, fleksibilitas, dan waktu yang lebih cepat. Hasil perhitungan dapat dinyatakan valid dengan selisih yang kurang dari 1% jika dibandingkan dengan hasil pada penelitian sebelumnya yang telah menghitung indeks LOLP dengan cara manual.

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Section: Pendahuluanunclassified

Pemodelan Perhitungan Indeks Lost of Load Probability untuk N Unit Pembangkit pada Sistem Kelistrikan Opsi Nuklir

Budi

Birmano

Bastori

2018

Jurnal Pengembangan Energi Nuklir

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“…Determining the post-disturbance stable equilibrium point of a power system, using a static simulation program, is a problem that has been defined since mid 70´s and continues to be reported in very recent papers, [7] to [11]. The aim of these approaches is to improve static security assessment results.…”

Section: B Determination Of the Post-disturbance Equilibrium Statementioning

confidence: 99%

“…In order to improve the results, we perform the following additional step [8]: 2. Compute new values of X mQ and X mP for all the generators considering the new system conditions, using (10) and (11), and set X mQ and X mP to the average of values before and after the disturbance. a.…”

Section: Model 1: Model Implemented By Pv and Pq Nodesmentioning

confidence: 99%

An alternative synchronous machine model for Quasi-Steady-State simulations

Garcia-Dominguez¹,

Ruiz-Vega²

2008

2008 40th North American Power Symposium

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The conventional system model for Quasi-Steady-State (QSS) simulation considers a current injection equilibrium model of the synchronous machine and a nodal admittance matrix model of the transmission system [1]. An alternative representation of the system for QSS simulation, referred to as the "reduced to the network model" has also been proposed, but has been considered less accurate or convenient than the conventional model.In this paper we present the basics and improvements to the synchronous machine model used in the "reduced to the network model" with special attention to the accuracy of the results. Accuracy is tested by a direct comparison between QSS simulation results and the ones obtained by a transient stability program, on an IEEE test system, using detailed modeling of the synchronous machines and their controls. We review the performance of the synchronous machine model in the operating region in which machine variables are within their permissible operating limits.The proposed new synchronous machine model is represented by its Q-V characteristic, in a similar way to the Q-V characteristic of a SVC, but in this case the slope of the linear part varies with system operating conditions. According to the results of extensive simulations, considering the effect of different static load characteristics, this improved synchronous machine model can also achieve an excellent accuracy in long term timedomain simulations.Index Terms--Synchronous machine model, quasi steady-state simulation, long term voltage stability assessment, determination of post-contingency equilibrium state. c c c d z = h x,y, z , zzd Under Load Tap Changers, Over excitation limiters.

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“…Os modelos convencionais de fluxo de carga não são capazes de levar em conta essas tecnologias. Mostra-se, por exemplo, em , Feng et al, 2000, Yeu e Sauer, 2005, Kopcak, 2007 que algumas hipóteses inerentes às equações do fluxo de carga convencional não refletem apropriadamente as características de regime permanente de diversos componentes dinâmicos do sistema. Um bom exemplo é a modelagem dos limites de corrente de campo e de armadura dos geradores síncronos, os quais só podem ser representados pela abordagem convencional de forma aproximada.…”

Section: Introductionunclassified

“…Para estudos em regime permanente, como é o caso do fluxo de carga, os termos das derivadas nas equações diferenciais são zerados, resultando em um conjunto matricial de equações algébricas não-lineares, que é então resolvido, de forma iterativa, pelo conhecido método de Newton. Este modelo já foi estudado considerando redes de transmissão , Feng et al, 2000, Yeu e Sauer, 2005, Kopcak, 2007, sendo que a contribuição deste trabalho consiste na sua aplicação para redes de distribuição, bem como a inclusão dos modelos de equipamentos usados em geração distribuída.…”

Section: Introductionunclassified

Um modelo de fluxo de carga para sistemas de distribuição contendo diferentes tecnologias de geração distribuida

Anzai¹,

Filho²

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Post-contingency equilibrium analysis techniques for power systems

Cited by 8 publications

References 4 publications

Pemodelan Perhitungan Indeks Lost of Load Probability untuk N Unit Pembangkit pada Sistem Kelistrikan Opsi Nuklir

Pemodelan Perhitungan Indeks Lost of Load Probability untuk N Unit Pembangkit pada Sistem Kelistrikan Opsi Nuklir

An alternative synchronous machine model for Quasi-Steady-State simulations

Um modelo de fluxo de carga para sistemas de distribuição contendo diferentes tecnologias de geração distribuida

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