Passivity-Based Virtual Damping Control of Three-Phase Grid-Tied PV Inverters
| Autor: | Jakob Teichrib, Shenghui Cui, Rik W. De Doncker, Zhiqing Yang, Chirag Shah |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Admittance Computer science 020208 electrical & electronic engineering Passivity 02 engineering and technology Dissipation Equivalent impedance transforms 01 natural sciences Phase-locked loop Three-phase Control theory 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Inverter Electrical impedance |
| Zdroj: | 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL). |
| Popis: | Apart from the classical control theory, the interconnection stability of a grid-tied inverter system can be investigated from the energy dissipation point of view. If a critical resonance occurs within regions where the system equivalent impedance/admittance behaves passively i.e. has only nonnegative real part, the system stability can be guaranteed. This paper presents the passivity-based stability analysis of a three-phase grid-tied photovoltaic inverter system. Passivity properties are observed over a wide frequency range for different control loops. Due to the implementation of a phase-locked loop and a direct-voltage control, passivity features are asymmetric between d- and q-axis. To enhance the system stability, a passivity-based control method is proposed by implementing virtual damping in d- and q-axis asymmetrically. By means of that, non-passive regions can be reduced over a specific frequency range. The validity of the proposed virtual damping control is investigated with both simulations and experiments. |
| Databáze: | OpenAIRE |
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