An Improved Model of Voltage Source Converters for Power System Harmonic Studies
| Autor: | Bo Gao, Wilsun Xu, Yang Wang |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Computer science
020209 energy Energy Engineering and Power Technology 02 engineering and technology Impedance parameters 7. Clean energy Power (physics) law.invention Harmonic analysis Electric power system Capacitor Control theory law Harmonics 0202 electrical engineering electronic engineering information engineering Harmonic Voltage source Electrical and Electronic Engineering |
| Zdroj: | IEEE Transactions on Power Delivery. 37:3051-3061 |
| ISSN: | 1937-4208 0885-8977 |
| Popis: | Voltage source converter (VSC) has been extensively used in power systems for interfacing renewable energies and other modern loads. Because of the nonlinear nature, it is important to establish a proper harmonic model of VSC devices when con-ducting harmonic analysis in power systems. This is especially true for low-order harmonics which are routinely encountered in present power systems. To this end, an analytical harmonic model that represents the low-order harmonic characteristics of the VSC is developed in this paper. The new model takes both the control loop and power loop (i.e., dc-link capacitor) of the VSC into account through rigorous mathematical derivations. The final result has shown that the VSC can be represented by a coupled impedance matrix at harmonic frequencies, which can be easily used for harmonic analysis in large-scale power systems. It also shows that the dc-link capacitor has a more noticeable impact on the harmonic impedance of VSC with a smaller dc-link capacitance and low-order harmonics. The correctness of the new model has been verified using EMT simulations and lab experiments. A complete procedure to construct the proposed VSC model is also established based on the research findings. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|