| Autor: |
Su, Guoyun, Xu, Long, Du, Wenjuan, Chen, Chen, Ji, Yining, Wang, Haifeng |
| Předmět: |
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| Zdroj: |
Journal of Engineering; Apr2019, Vol. 2019 Issue 4, p2514-2519, 6p |
| Abstrakt: |
Power system voltage stability can be significantly affected by load dynamic characteristics. This study examines the impacts of dynamic interaction between doubly fed induction generator (DFIG)-based wind farms and induction motor (IM) loads on system dynamic voltage stability. It is revealed that the IM load model exhibits a recovery response which is accompanied by an IM oscillation mode (IMOM). The IMOM is first demonstrated to be closely related to system voltage stability. Moreover, a closed-loop interconnected model is established, which consists of the following two open-loop subsystems: DFIG; the rest of power system with IM loads. Generally, due to the fast response of the voltage-source converter control loop, the dynamic interaction between the two open-loop subsystems is weak. However, it is discovered that under a special condition named as open-loop modal coupling, the aforementioned dynamic interaction will become tremendous. As a consequence, the damping of IMOM may be degraded substantially which can cause system voltage instability. Therefore, the mechanism of dynamic voltage instability issues is investigated from the perspective of modal coupling. A modified Western Systems Coordinating Council (WSCC) 9-bus system integrated with a DFIG-based wind farm is adopted to demonstrate and validate the above conclusions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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