State space model building and validation by comparison with non-linear models and performing SSA
The level of penetration of renewables and power electronics in the grid is increasing, and in the future, it may even be possible to have a 100 % converter-based transmission system[1]. In such a future, methods for analyzing the stability of the grid with high penetration of power electronics and...
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| Formato: | tesis de maestría |
| Fecha de publicación: | 2023 |
| País: | España |
| Recursos: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/393871 |
| Acesso em linha: | https://hdl.handle.net/2117/393871 |
| Access Level: | acceso abierto |
| Palavra-chave: | Electric power systems -- Automatic control -- Design and construction Smart power grids -- Automatic control -- Mathematical models Electric power system stability Sistemes de distribució d'energia elèctrica -- Control automàtic -- Disseny i construcció Xarxes elèctriques intel·ligents -- Control automàtic -- Models matemàtics Sistemes de distribució d'energia elèctrica -- Estabilitat Àrees temàtiques de la UPC::Energies::Tecnologia energètica::Emmagatzematge i transport de l'energia |
| Resumo: | The level of penetration of renewables and power electronics in the grid is increasing, and in the future, it may even be possible to have a 100 % converter-based transmission system[1]. In such a future, methods for analyzing the stability of the grid with high penetration of power electronics and renewable energy sources are essential. However, due to the increased penetration of power electronics in power systems and the instability of renewable energy sources, the stability analysis of power systems can be very complex. In this paper, GFOL(Grid following system) and GFOR(Grid forming system) are modeled and verified using the state-space equation, and then the stability of the system is analyzed based on the data from the matrix of the state-space equation. This thesis first describes the working principles, advantages and disadvantages, key components, and key technologies of GFOL(Grid following system) and GFOR(Grid forming system). The system components are described and modeled. Control schemes are described, the basic necessary control modules are detailed and simulation results are provided to illustrate the control methods described. This thesis then investigates the application of state-space modeling to the modeling of circuits and control elements. The linearisation of non-linear equations is introduced and the state-space equation of state models for GFOL and GFOR are constructed and validated using small signal disturbance analysis. Finally, the stability of the GFOR and GFOL systems was assessed and analyzed through indicators such as eigenvalues and participation coefficients. This paper provides a simple and reliable example for analyzing the stability of modern power systems by modeling, verifying, and analysing the state-space equations of power systems |
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