Experience concerning availability and reliability of DSAS from WG B5.42
Digital Substation Automation Systems (DSAS),with some form of communication facility on station or bay level,have already been in service for several decades.Their functions include protection,command,control,supervision,grid and equipment monitoring,auto diagnosis and metering,to varying degrees of capability and complexity.The performance of the DSAS is a vital element for the efficiency of the power system operation.Concerning operation and failure analysis of DSASs,most utilities and vendors have their individual procedure to gather information from the field,analyse these data and initiate specific maintenance or replacement actions on this basis.Feedback from the experience gained to date has been identified as of major benefit to users, for effective design and life-time management of protection and control systems. The operational experience concerning dependability and reliability of these systems, but also problems related to hardware or software of IED, are the base for new developments or improvements. This paper will discuss how Users, Manufacturers and Systems Integrators can use experiences related to Reliability, Availability, Maintainability and Performance (RAMP) to specify, design, develop, operate and maintain the DSAS system. It will include experience gained from the survey studied by Working group Cigre B5.42 1. The survey shows that many utilities use little efforts to gather thorough knowledge of RAMP, make detailed fault statistics of DSAS or specify detailed requirements for RAMP of DSAS. For a utility/end user of a DSAS project, actions should be planned during the design and development phase in order to ensure the adequacy of the dependability design specifications, the completeness of design verification and validation prior to design release, and the applicability of the maintenance support strategy for product operation, maintenance support and end of life disposal.For a DSAS system or equipment manufacturer, actions during the design and development phase should include RAMP requirement specification, product hardware and/or software specification, quality procedures, certification definition and compliance testing. During the manufacturing phase vendors are requested to consider RAMP effects on the process, taking into account the feedback they receive from the utilities/end customers, as well as the feedback from prototype/pilot system tests aimed to validate the RAMP of the system itself. The integrated system or end product should be put through its performance demonstration in an actual operating environment prior to final acceptance for operation. During this phase the users could operate many types of maintenance, by themselves or with the contribution of a manufacturer or a third part company. Beyond maintenance, during the operation phase the users may have to alter some settings or to extend the size of the substation. The survey reveals a certain lack of focus related to the management of warranty and maintenance contracts. There are not many utilities dealing with the maintenance performance and the way to measure it, for example: investigation time, repair time by vendor, time to partial restoration, classification by severity, etc. Finally, utilities and vendors opinions about the impact of IEC 61850 Standard on DSASs RAMP, have been investigated: according to the survey results, almost all the interviewed vendors, but also half of the interviewed utilities, think that the adoption of IEC 61850 can improve DSAS RAMP.
Digital Substation Automation Systems (DSAS) Reliability Availability Maintainability and Performance (RAMP) management and organisational changes
M. PETRINI E. CASALE M. PEDICINO R. S. J. L(o)KEN A. DARBY J.-L. NOE P. LINDBLAD C. D. ARRIBA
Terna Italy Statnett Norway United Kingdom Alstom RTE France Fingrid Finland GE Spain
国际会议
国际大电网会议组织保护与自动化专业委员会年度会议暨学术研讨会
南京
英文
1-7
2015-09-20（万方平台首次上网日期，不代表论文的发表时间）