A Delta Connected Hybrid STATCOM and Dc Capacitor Voltage Balance Technique Using Zero-Sequence Current
| Autor: | Ibhan Chand Rath, Anshumna Shukla |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
business.industry
Computer science 020209 energy 020208 electrical & electronic engineering Electrical engineering Modulation index 02 engineering and technology Grid Symmetrical components Energy storage Power (physics) law.invention Capacitor law 0202 electrical engineering electronic engineering information engineering Harmonic business Voltage |
| Zdroj: | 2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES). |
| Popis: | The parallel hybrid converter (PHC) is advantageous over the modular multilevel converter (MMC) in terms of energy storage requirement, number of switching devices, capacitors and switching losses. However, the PHC cannot be employed for static compensation (STATCOM) applications, owing to its nature of operation at a fixed modulation index (MI). The PHC utilizes harmonic injection methods (HIMs) to regulate its MI, within narrow limits. These harmonic voltages tend to be unequal, during unbalanced grid conditions (UGCs), and therefore enter the grid and distort it further. This paper proposes a new delta hybrid STATCOM (DH-SC) which inherits the advans power with the grid and hence the capacitor voltages belonging to different CLs divert from its reference value. However, the capacitor voltages get restored to its original value with the injection of unequal third harmonic voltages as mentioned above. Nonetheless, these unequal harmonic voltages enter into the grid and further degrade its power quality. This paper proposes a new delta hybrid STATCOM (DH-SC), which is capable of operating at any MI without requiring any THIMs, both during balanced and unbalanced grid conditions. The proposed DH-SC converter also inherits the advantages of PHC over MMC such as lower energy storage requirement, lesser number of capacitors and lesser switching loss. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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