Abstract
This paper examines the dynamic performance of a vectorcurrent controlled unified power flow controller (UPFC) to be installed in an actual Chinese power network. This first UPFC of China, with a total rating of ± 120MVA, has been in full operation since the end of 2015. This paper establishes the non-linear dynamic mathematical model of the vector-current controlled UPFC to be installed in the power network and carries out detailed examination on the dynamic performance of the UPFC and its impact on power system small-signal angular stability. The linearized model of the UPFC is derived afterwards. Based on the derived model, dynamic interactions among the multiple control functions of the UPFC are investigated by using the method of relative gain array (RGA). It is found that the vector-current controlled UPFC exhibits well decoupling performance among multiple control loops. This finding is further confirmed by the results of non-linear simulation. Moreover, modal analysis is conducted to examine the impact of the installation of the UPFC on the damping of electromechanical oscillation modes of the real power network. Conclusions of the modal analysis are further validated by the non-linear simulation results.
| Original language | English |
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| Title of host publication | IET Conference Publications |
| Publisher | Institution of Engineering and Technology |
| Publication status | Published - 1 Jan 2016 |
| Externally published | Yes |
| Event | 12th IET International Conference on AC and DC Power Transmission, ACDC 2016 - Beijing, China Duration: 28 May 2016 → 29 May 2016 |
Conference
| Conference | 12th IET International Conference on AC and DC Power Transmission, ACDC 2016 |
|---|---|
| Country/Territory | China |
| City | Beijing |
| Period | 28/05/16 → 29/05/16 |
Keywords
- Linearized model
- Non-linear dynamic mathematical model
- RGA
- Smallsignal angular stability
- Vector-current controlled UPFC
ASJC Scopus subject areas
- Electrical and Electronic Engineering