Abstract
Power electronic converters operated in AC power system, such as the boost rectifier, behave as a constant power loads (CPLs), which have negative impedance characteristics at the input terminals. And this might cause system instability. In small-signal sense, the stability of the system including the CPL is determined by the source output impedance and the load input impedance (admittance). As a result, the stability criterion based on these impedances is an effective way to check the stability of the system. This paper summarized existing work, and proposed a novel stability criterion using the infinite-norm of the impedance (admittance) matrixes for three phase AC power systems. Further, the conservatism of the proposed criterion was compared with the one of the existing criterions. Among existing four stability criterions, singular-value criterion is with the least conservatism, while the calculation of the singular-value is complex. However, the conservatism of the proposed stability criterion based on the infinite-norm is close to the one of singular-value criterion, and it is simpler to calculate the infinite-norm. Consequently, the proposed stability criterion can facilitate the stability analysis of the three phase AC power systems.
| Original language | English |
|---|---|
| Pages (from-to) | 143-148 |
| Number of pages | 6 |
| Journal | Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering |
| Volume | 32 |
| Issue number | 25 |
| State | Published - 5 Sep 2012 |
Keywords
- Converter load
- Infinite-norm
- Singular-value
- Stability criterion
- Three-phase AC power systems