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- Bernhardsson, Bo, et al.
(författare)
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A Load Model Structure for Analysis and Control of Electric Distribution Network
- 1999
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Ingår i: IFAC Proceedings Volumes. ; 32:2, s. 6148-6153
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Tidskriftsartikel (refereegranskat)abstract
- Power electronics result in increased harmonic distortion, but can also be used for harmonic mitigation. This requires simple, low order models for nonlinear networks. The Harmonic Norton Equivalent is a load model structure that supports aggregation of nonlinear loads, and makes nonlinear network solving (i.e. simulation) a non-iterative procedure. It is a linearized description of the relation between voltage spectrum and current spectrum. A procedure for obtaining the Equivalents from measurements is presented and shows good agreement with the validation data.
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- Bernhardsson, Bo, et al.
(författare)
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A Simple Model for Harmonics in Electrical Distribution Networks
- 1997
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Ingår i: Proceedings of the 36th IEEE Conference on Decision and Control.
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Konferensbidrag (refereegranskat)abstract
- A modularized approach to modeling of harmonics in electrical distribution networks at steady state is presented. It is based on harmonic balance and exploits that the loads in a distribution network are connected in parallel in such a way that their operating conditions are approximately known in advance (e.g. 230 V, 50 Hz) and the harmonic distortion of the voltage is limited. The model for a component is given by a linear relation between the Fourier coefficients of the deviations from nominal current and voltage. The linear relationship implies that aggregation of loads and network solving are a matter of solving linear equation systems. This leads to fast calculations without convergence problems.
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