Identification of Weak Areas of Power Network Based on Exposure to Voltage Sags—Part I: Development of Sag Severity Index for Single-Event Characterization

This paper presents a new single-event characteristic, sag severity index (SSI), derived with respect to equipment sensitivity to voltage sags. It is more inclusive of associated uncertainties/variation in equipment response to voltage sags than existing single-event characteristics. By changing parameter settings, the index appropriately accounts for sag duration and adequately addresses the variation in equipment sensitivity. The value of the index changes continuously at the joining regions of different sag severity levels and reflects realistically the sensitivity trend of equipment embedded in voltage tolerance curves. The properties of the SSI are analyzed and discussed through comparison with characteristics of five previously reported single-event indices including four numerical indices and one fuzzy voltage sag index.

[1]  R. S. Thallam,et al.  Voltage-sag indices - recent developments in IEEE PI564 task force , 2003, CIGRE/IEEE PES International Symposium Quality and Security of Electric Power Delivery Systems, 2003. CIGRE/PES 2003..

[2]  S.Z. Djokic,et al.  A new method for classification and presentation of voltage reduction events , 2005, IEEE Transactions on Power Delivery.

[3]  Chan-Nan Lu,et al.  A Voltage Sag Index Considering Compatibility Between Equipment and Supply , 2007, IEEE Transactions on Power Delivery.

[4]  R. S. Thallam,et al.  Power acceptability and voltage sag indices in the three phase sense , 2000, 2000 Power Engineering Society Summer Meeting (Cat. No.00CH37134).

[5]  Irene Yu-Hua Gu,et al.  Signal processing of power quality disturbances , 2006 .

[6]  Jovica V. Milanovic,et al.  Advanced voltage sag characterisation ii: point on wave , 2007 .

[7]  C.N. Lu,et al.  Voltage sag immunity factor considering severity and duration , 2004, IEEE Power Engineering Society General Meeting, 2004..

[8]  V. K. Ramachandaramurthy,et al.  Voltage Sag Acceptability Assessment Using Multiple Magnitude-Duration Function , 2012, IEEE Transactions on Power Delivery.

[9]  H. Wayne Beaty,et al.  Electrical Power Systems Quality , 1995 .

[10]  Chan-Nan Lu,et al.  Estimation of Sensitive Equipment Disruptions Due to Voltage Sags , 2007, 2007 IEEE Power Engineering Society General Meeting.

[11]  Jovica V Milanović,et al.  Risk-Based Assessment of Financial Losses Due to Voltage Sag , 2011, IEEE Transactions on Power Delivery.

[12]  J.V. Milanovic,et al.  Sensitivity of AC adjustable speed drives to voltage sags and short interruptions , 2005, IEEE Transactions on Power Delivery.

[13]  Jhan Yhee Chan.  Framework for assessment of economic feasibility of voltage sag mitigation solutions , 2010 .

[14]  D.D. Sabin,et al.  International Coordination for Voltage Sag Indices , 2006, 2005/2006 IEEE/PES Transmission and Distribution Conference and Exhibition.

[15]  J.V. Milanovic,et al.  Sensitivity of personal computers to voltage sags and short interruptions , 2005, IEEE Transactions on Power Delivery.

[16]  J.V. Milanovic,et al.  Probabilistic assessment of financial losses due to interruptions and voltage sags-part I: the methodology , 2006, IEEE Transactions on Power Delivery.

[17]  Jovica V. Milanovic,et al.  Advanced voltage sag characterisation. Part I: Phase shift , 2006 .

[18]  J.V. Milanovic,et al.  Probabilistic assessment of equipment trips due to voltage sags , 2006, IEEE Transactions on Power Delivery.

[19]  Gilsoo Jang,et al.  Assessment of system voltage sag performance based on the concept of area of severity , 2010 .

[20]  J.V. Milanovic,et al.  Generic Failure-Risk Assessment of Industrial Processes due to Voltage Sags , 2009, IEEE Transactions on Power Delivery.

[21]  J.V. Milanovic,et al.  Probabilistic assessment of financial losses due to interruptions and voltage sags - part II: practical implementation , 2006, IEEE Transactions on Power Delivery.

[22]  J.V. Milanovic,et al.  Severity Indices for Assessment of Equipment Sensitivity to Voltage Sags and Short Interruptions , 2007, 2007 IEEE Power Engineering Society General Meeting.

[23]  S.Z. Djokic,et al.  Shortfalls of existing methods for classification and presentation of voltage reduction events , 2005, IEEE Transactions on Power Delivery.

[24]  Johan Driesen,et al.  Assessment of voltage sag indices based on scaling and wavelet coefficient energy analysis , 2013, 2013 IEEE Power & Energy Society General Meeting.

[25]  Matti Lehtonen,et al.  Equipment sensitivity to voltage sags-test results for contactors, PCs and gas discharge lamps , 2002, 10th International Conference on Harmonics and Quality of Power. Proceedings (Cat. No.02EX630).

[26]  A. M. Dan.  Introducing a voltage dip severity index (a proposal) , 2010, Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010.