Risk and reliability assessment for electrical distribution systems and impacts of regulations with examples from Sweden

The introduction of performance based tariff regulations, and higher media and political pressure have increased the need for well-performed asset management in the operation and planning of electrical distribution systems. In this paper quantitative reliability assessment methods are proposed as a tool to meet these new incentives. Electrical distribution systems have compared to other technical systems several special characteristics which are important to take into consideration when introducing reliability analysis methods. Moreover, the paper gives a brief discussion on the effects and the importance of customer participation in improving system reliability by providing additional system operating reserve from the market perspective. Finally, the paper discusses the reliability analysis with the reliability test systems, and stresses the usefulness of generally known test systems for such assessments. The ideas of future work on development of these test systems to address the changing power systems are presented.

[1]  L. Bertling,et al.  Investigation of the Robustness of the Swedish Network Performance Assessment Model , 2008, IEEE Transactions on Power Systems.

[2]  L. Bertling,et al.  Maintenance Management of Wind Power Systems Using Condition Monitoring Systems—Life Cycle Cost Analysis for Two Case Studies , 2007, IEEE Transactions on Energy Conversion.

[3]  K. Bhattacharya,et al.  Competitive framework for procurement of interruptible load services , 2003, 2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491).

[4]  Roy Billinton,et al.  Adequacy assessment of composite power systems with HVDC links using Monte Carlo simulation , 1994 .

[5]  R. Billinton,et al.  Historic performance-based distribution system risk assessment , 2004, IEEE Transactions on Power Delivery.

[6]  Probability Subcommittee,et al.  IEEE Reliability Test System , 1979, IEEE Transactions on Power Apparatus and Systems.

[7]  Magnus Gammelgård.  The Network Performance Assessment Model : A Review of theSwedish tool for Regulation , 2002 .

[8]  Carl Johan Wallnerström.  On Risk Management of Electrical Distribution Systems and the Impact of Regulations , 2008 .

[9]  Lina Bertling,et al.  Reliability-centred maintenance for electric power distribution systems , 2002 .

[10]  I. Kamwa,et al.  Causes of the 2003 major grid blackouts in North America and Europe, and recommended means to improve system dynamic performance , 2005, IEEE Transactions on Power Systems.

[11]  Carl Johan Wallnerström,et al.  A Comparative Study of Regulation Policies for Interruption of Supply of Electrical Distribution Systems in Sweden and UK , 2007 .

[12]  Lina Bertling,et al.  Laws And Regulations Of Swedish Power Distribution Systems 1996-2012 : learning from novel approaches such as less good experiences , 2010 .

[13]  R. Billinton,et al.  A comparison of four-state generating unit reliability models for peaking units , 2004, IEEE Transactions on Power Systems.

[14]  Mohammad Shahidehpour,et al.  The IEEE Reliability Test System-1996. A report prepared by the Reliability Test System Task Force of the Application of Probability Methods Subcommittee , 1999 .

[15]  Carl Johan Wallnerström,et al.  Risk management applied to electrical distribution systems , 2009 .

[16]  Roy Billinton,et al.  A reliability test system for educational purposes-basic distribution system data and results , 1991 .

[17]  Carl Johan Wallnerström,et al.  A Sensitivity Study of the Swedish Network Performance Assessment Model Investigating the Effects of Changes in Input Data , 2007 .

[18]  Roy Billinton,et al.  Reliability evaluation of power systems , 1984 .

[19]  D. Dalabeih.  Reliability Evaluation of Distribution Systems , 1990 .

[20]  A. Nguni,et al.  Interruptible Load and Demand Response: Worldwide Picture and the Situation in Sweden , 2006, 2006 38th North American Power Symposium.

[21]  Roy Billinton,et al.  A test system for teaching overall power system reliability assessment , 1996 .

[22]  D.S. Popovic,et al.  Selective Maintenance Schedule of Distribution Networks Based on Risk Management Approach , 2007, IEEE Transactions on Power Systems.

[23]  L. Bertling,et al.  Evaluation of the customer value of component redundancy in electrical distribution systems , 2005, 2005 IEEE Russia Power Tech.

[24]  D. Nordgård.  Risk Analysis for Decision Support in Electricity Distribution System Asset Management : Methods and frameworks for analysing intangible risks , 2010 .