Robust GPS-Based Timing for PMUs: A Position-Information-Aided Approach
The security and reliability of GPS receivers are critical to Phasor Measurement Units (PMUs). These devices provide synchronized voltage and current phasor measurements in power systems based on GPS timing. However, due to the unencrypted nature and low received signal to noise ratio of civil GPS signals, jamming and spoofing attacks on GPS receivers can pose a risk to both the position and timing solutions. In this work, we aim for robust GPS time transfer for PMUs. We achieve this goal by taking advantage of the static nature of PMUs. We propose a position-information-aided vector tracking loop to improve tracking capabilities and ensure continued operation through various attacks. To evaluate the effectiveness of the algorithm presented in this paper, we further conduct field experiments. Our test shows that the proposed position-information-aided vector tracking approach 1) improves the robustness of GPS receivers used in PMUs against jamming; 2) is able to successfully detect record-and-reply attacks; and 3) improves the accuracy of timing solutions.
**Won Best Presentation of the Session Award at ION GNSS 2014 Conference.
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."
