TY - JOUR
T1 - Safety assessment of hydro-generating units using experiments and grey-entropy correlation analysis
AU - Li, Huanhuan
AU - Chen, Diyi
AU - Arzaghi, Ehsan
AU - Abbassi, Rouzbeh
AU - Xu, Beibei
AU - Patelli, Edoardo
AU - Tolo, Silvia
PY - 2018/12/15
Y1 - 2018/12/15
N2 - This paper focuses on the safety analysis of a nonlinear hydro-generating unit (HGU) running under different loads. For this purpose, a dynamic balance experiment implemented on an existing hydropower station in China is considered, to qualitatively investigate the stability of the system and to obtain the necessary indices for safety assessment. The experimental data are collected from four on-load units operating at different working heads including 431 m, 434 m, 437 m, and 440 m. A quantitative analysis on the safety performance of the four units was carried out by employing an integration of entropy weights method with grey correlation analysis. This assisted in obtaining the safety degree of each unit, providing the risk prompt to the operation of nonlinear hydro-generating units. The results confirm that unit 4 has the highest level of safety while unit 3 operates with the lowest safety condition. This provides the optimal operational schedule of HGUs to cope with the fluctuations of electricity demand in the studied station. The proposed methodology in this paper is not only applicable to the HGUs in the studied station but could also be adopted to assess the safety degree of any hydropower facility.
AB - This paper focuses on the safety analysis of a nonlinear hydro-generating unit (HGU) running under different loads. For this purpose, a dynamic balance experiment implemented on an existing hydropower station in China is considered, to qualitatively investigate the stability of the system and to obtain the necessary indices for safety assessment. The experimental data are collected from four on-load units operating at different working heads including 431 m, 434 m, 437 m, and 440 m. A quantitative analysis on the safety performance of the four units was carried out by employing an integration of entropy weights method with grey correlation analysis. This assisted in obtaining the safety degree of each unit, providing the risk prompt to the operation of nonlinear hydro-generating units. The results confirm that unit 4 has the highest level of safety while unit 3 operates with the lowest safety condition. This provides the optimal operational schedule of HGUs to cope with the fluctuations of electricity demand in the studied station. The proposed methodology in this paper is not only applicable to the HGUs in the studied station but could also be adopted to assess the safety degree of any hydropower facility.
KW - Dynamic balance experiment
KW - Grey-entropy correlation
KW - Hydro-generating unit
KW - Safety analysis
UR - http://www.scopus.com/inward/record.url?scp=85054662807&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2018.09.079
DO - 10.1016/j.energy.2018.09.079
M3 - Article
AN - SCOPUS:85054662807
SN - 0360-5442
VL - 165
SP - 222
EP - 234
JO - Energy
JF - Energy
ER -