Load shedding scheme for an interconnected hydro-thermal hybrid system with SMES

doi:10.1007/s11708-012-0198-6

Front Energ

2012, Vol. 6

Issue (3) : 227-236 https://doi.org/10.1007/s11708-012-0198-6

RESEARCH ARTICLE

Load shedding scheme for an interconnected hydro-thermal hybrid system with SMES

D. TYAGI, Ashwani KUMAR(

), Saurabh CHANANA

Department of Electrical Engineering, National Institute of Technology, Kurukshetra 136119, India

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Abstract

The frequency of the power system varies based on the load pattern of the consumers. With continuous increase in the load, the frequency of the system keeps decreasing and may reach its minimum allowable limits. Further increase in the load will result in more frequency drop leading to the need of load shedding, if excess generation is not available to cater the need. This paper proposed a methodology in a hybrid thermal-hydro system for finding the required amount of load to be shed for setting the frequency of the system within its minimum allowable limits. The load shedding steps were obtained based on the rate of change of frequency with the increase in the load in both areas. The impact of superconducting magnetic energy storage (SMES) was obtained on load shedding scheme. The comparison of the results was presented on the two-area system.

Keywords critical load frequency response load shedding multi-area system rate of change of frequency superconducting magnetic energy storage (SMES) device

Corresponding Author(s): KUMAR Ashwani,Email:ashwa_ks@yahoo.co.in

Issue Date: 05 September 2012

Cite this article:

D. TYAGI,Ashwani KUMAR,Saurabh CHANANA. Load shedding scheme for an interconnected hydro-thermal hybrid system with SMES[J]. Front Energ, 2012, 6(3): 227-236.

URL:

https://academic.hep.com.cn/fie/EN/10.1007/s11708-012-0198-6
https://academic.hep.com.cn/fie/EN/Y2012/V6/I3/227

Fig.1 Model of two-area system without SMES

Fig.2 SMES-circuit diagram []

Fig.3 SMES block diagram with negative inductor current deviation feedback

Fig.4 SIMULINK diagram of hydrothermal power plant with SMES in thermal area

Fig.5 Frequency response of Area 1 corresponding to equally varying loads in both areas

Tab.1 Frequency variation w.r.t change in loads without SMES

Fig.6 Frequency response of Area 2 corresponding to equally varying loads in both areas

Fig.7 Frequency response of Area 1 after load shedding

Fig.8 Frequency response of Area 2 after load shedding

Fig.9 Frequency response of Area 1 corresponding to equally varying loads in both areas with SMES

Tab.2 Frequency variation w.r.t loads with SMES

Fig.10 Frequency response of Area 2 corresponding to equally varying loads in both areas with SMES

Fig.11 Frequency response of Area 1 after load shedding

Fig.12 Frequency response of Area 2 after load shedding

Fig.13 Frequency for different loads with and without SMES for Area 1

Fig.14 Frequency for different loads with and without SMES for Area 2

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