Online Assessment of Fault Current Considering Substation Topologies
Changes to the power system, especially the installation of new generation sources and new operating conditions, result in higher fault currents. Circuit breakers, which are previously designed and coordinated for the power systems before the appearances of new generation sources and new operating conditions, may have inadequate fault current interruption capability. This paper discusses those operating conditions that result in interruption capability violations of circuit breakers, based on substation topologies/circuit breaker connections. An online application of fault current assessment is proposed to identify those unsafe operating conditions limited by circuit breaker interruption capabilities. Based on the findings of the paper, this application can give system operators suggestions of remedy actions that eliminate unsafe operating conditions by changing substation topologies. The design of such an online application is described and a MATLAB version is tested on IEEE 14-bus system.
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
- The following copyright notice applies to all of the above items that appear in IEEE publications: "Personal use of this material is permitted. However, permission to reprint/publish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from IEEE."
- The following copyright notice applies to all of the above items that appear in ACM publications: "© ACM, effective the year of publication shown in the bibliographic information. This file is the author’s version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in the journal or proceedings indicated in the bibliographic data for each item."
- The following copyright notice applies to all of the above items that appear in IFAC publications: "Document is being reproduced under permission of the Copyright Holder. Use or reproduction of the Document is for informational or personal use only."