Results 181 to 190 of about 7,353 (217)

Shunt reactor switching simulation by EMTP

Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521), 2004
The work reported in this paper is EMTP simulation of reactor switching. The simulation has identified the causes of high transient overvoltage, which are produced when switching high voltage shunt reactors.
B. Vahidi, A. Ghatrehsamani, S.A. Kashi
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Elimination of undemonstrable phenomena in the EMTP

POWERCON '98. 1998 International Conference on Power System Technology. Proceedings (Cat. No.98EX151), 2002
This paper discusses the undemonstrable phenomena that can occur when the EMTP is used for simulation of some types of networks, consisting of power electronics, and/or voltage-, current controlled elements. The synchronous response procedure (SRP) is suggested for elimination of these phenomena.
openaire   +1 more source

EMTP modeling of hybrid HVDC breakers

2015 IEEE Power & Energy Society General Meeting, 2015
HVDC meshed systems offer several advantages in front of their HVAC counterparts. However, the lack of fast, low-losses and reliable circuit breaker technology has postponed their implementation. A recently proposed hybrid breaker design can alter this situation.
Juan A. Martinez, Jesper Magnusson
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A high frequency transformer model for the EMTP

IEEE Transactions on Power Delivery, 1993
A model to simulate the high-frequency behavior of a power transformer is presented. This model is based on the frequency characteristics of the transformer admittance matrix between its terminals over a given range of frequencies. The transformer admittance characteristics can be obtained from measurements or from detailed internal models based on the
A. Morched, L. Marti, J. Ottevangers
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Universal Arc Representation Using EMTP

IEEE Transactions on Power Delivery, 2005
A preliminary description of a new arc representation has been introduced in . In which, the Modified Mayr (P-/spl tau/ model) arc equations are solved in the transient analysis control system (TACS) field of the electromagnetic transient program (EMTP) and represented in the power network by TACS controlled voltage source.
H.A. Darwish, N.I. Elkalashy
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MODELS: A new simulation tool in the emtp

European Transactions on Electrical Power, 1992
AbstractMODELS is an autonomous general‐purpose simulation program recently interfaced to two versions of the Electromagnetic Transients Program (EMTP). This interfacing enables the description of components that could not be represented easily until now using the electrical elements of the EMTP and the set of control blocks available in its TACS ...
L. Dubé, I. Bonfanti
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Headway of Transformer Models in EMTDC/EMTP

2007 8th International Conference on Electronic Measurement and Instruments, 2007
The developments of transformer models in electromagnetic transients programs of EMTP/EMTDC are introduced in details. We show that different transformer models can result in different transients' phenomena. It is seen that UMEC model is more accurate for simulation on non-linear analysis than classical transformer models.
null Li Huawei, Fan Yu
openaire   +1 more source

Discussion on the initialization of the EMTP-type programs

Canadian Conference on Electrical and Computer Engineering, 2005., 2006
A discussion on the initialization of the electromagnetic transient programs (the EMTP-type programs) is presented in this paper. Since power systems are getting larger, establishing the steady state of a network for transient study can be very time consuming. Initializing the EMTP-type programs must be undertaken to improve their solution speeds.
K.W. Louie, A. Wang, P. Wilson, P. Buchanan   +3 more
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การศึกษาเปรียบเทียบแบบจำลองการเกิดวาบไฟและการใช้งานในโปรแกรม EMTP

วิทยานิพนธ์ฉบับนี้นำเสนอผลการศึกษาการใช้อินทิเกรชันโมเดลและลีดเดอร์โมเดลในโปรแกรม EMTP เพื่อจำลองการเกิดเบรกดาวน์ของแกปอากาศเนื่องจากแรงดันอิมพัลส์ฟ้าผ่าระหว่างอิเล็กโตรดทั้งแบบ rod-rod และ rod-plane ที่มีระยะแกปในช่วง 10-28.5 ซม. และนำไปประยุกต์ใช้สำหรับจำลองการเกิดวาบไฟตามผิวของลูกถ้วยแท่งก้านตรงชนิด 56/57-2 และ 56/57-3 โดยเปรียบเทียบเส้นโค้งแรงด ...
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Emtp simulation of synchronous machine from standstill to synchronization

2009 IEEE Power & Energy Society General Meeting, 2009
This paper presents the modeling and simulation studies for the startup of a 250 MVA pumped storage unit in pumping mode and the startup of a 65 MVA hydraulic unit as a corrective action following an uncontrolled islanding of an area due to an extreme contingency.
Karaağaç, Ulaş, Mahseredjian, Jean, Dennetière, Sébastien   +2 more
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