Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | IEEE PES General Meeting |
| Seiten | 1-8 |
| Seitenumfang | 8 |
| Publikationsstatus | Veröffentlicht - 1 Juli 2010 |
Abstract
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IEEE PES General Meeting. 2010. S. 1-8.
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Resonance analyses in transmission systems: Experience in Germany
AU - Amornvipas, C.
AU - Hofmann, L.
PY - 2010/7/1
Y1 - 2010/7/1
N2 - In order to analyze harmonic problems effectively, system resonant behavior in addition to harmonic sources has to be concerned. Resonant frequencies are known as the critical frequencies of electrical power systems, where systems could be sensitively excited. Harmonic sources which normally behave like frequency-dependent current sources could excite system parallel resonant frequencies. These results in extremely high overvoltage which could be dangerous to electrical power system elements as well as affect power system operation negatively. Conventionally parallel resonant frequencies will be detected by observing the positions at nodal impedance-frequency curves where impedances are especially high. However, resonant frequencies determined from different nodal impedance-frequency curves might not be identical. Moreover, some resonant frequencies could not be obviously identified. In contrast, system parallel resonant frequencies will be obviously identified at modal impedance-frequency curves in modal coordinate system by using the method of Resonance Mode Analysis or RMA. In modal coordinate system, it is more effective to identify parallel resonant frequencies and also analyze individual resonances. The theory of RMA and its application for determining system resonances in a test system are shown in this paper. As the basis for resonance analysis with RMA in correspondence with switching operations, formulation of the modified nodal admittance matrices for series and shunt power system elements based on the fault matrix method is demonstrated. At the end of this paper, the results of resonance analyses in an Extra High Voltage (EHV) transmission system in Germany at different operating conditions by using the methods presented in this paper are shown and discussed.
AB - In order to analyze harmonic problems effectively, system resonant behavior in addition to harmonic sources has to be concerned. Resonant frequencies are known as the critical frequencies of electrical power systems, where systems could be sensitively excited. Harmonic sources which normally behave like frequency-dependent current sources could excite system parallel resonant frequencies. These results in extremely high overvoltage which could be dangerous to electrical power system elements as well as affect power system operation negatively. Conventionally parallel resonant frequencies will be detected by observing the positions at nodal impedance-frequency curves where impedances are especially high. However, resonant frequencies determined from different nodal impedance-frequency curves might not be identical. Moreover, some resonant frequencies could not be obviously identified. In contrast, system parallel resonant frequencies will be obviously identified at modal impedance-frequency curves in modal coordinate system by using the method of Resonance Mode Analysis or RMA. In modal coordinate system, it is more effective to identify parallel resonant frequencies and also analyze individual resonances. The theory of RMA and its application for determining system resonances in a test system are shown in this paper. As the basis for resonance analysis with RMA in correspondence with switching operations, formulation of the modified nodal admittance matrices for series and shunt power system elements based on the fault matrix method is demonstrated. At the end of this paper, the results of resonance analyses in an Extra High Voltage (EHV) transmission system in Germany at different operating conditions by using the methods presented in this paper are shown and discussed.
KW - constant current sources
KW - high-voltage techniques
KW - modal analysis
KW - power system harmonics
KW - power transmission faults
KW - resonance
KW - electrical power systems
KW - harmonic sources
KW - frequency-dependent current sources
KW - resonant frequencies
KW - nodal impedance-frequency curves
KW - resonance mode analysis
KW - RMA
KW - modal coordinate system
KW - switching
KW - shunt power system
KW - series power system
KW - fault matrix method
KW - extra high voltage
KW - EHV transmission system
KW - Germany
KW - Resonant frequency
KW - Power systems
KW - Symmetric matrices
KW - Impedance
KW - Switches
KW - Transmission line matrix methods
KW - Admittance
KW - Fault Matrix Method
KW - Modal Coordinate System
KW - Power Transmission System
KW - Resonant Frequencies
KW - Resonance Mode Analysis (RMA)
U2 - 10.1109/PES.2010.5588098
DO - 10.1109/PES.2010.5588098
M3 - Conference contribution
SP - 1
EP - 8
BT - IEEE PES General Meeting
ER -