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<p>This paper explores advancements in wide-area measurement systems (WAMS) to enhance backup protection for transmission networks, addressing challenges posed by delays in data transmission, communication, and algorithm execution. Wide-area backup protection (WABP) operates within a few hundred milliseconds. It prevents the protection system misoperation and mitigate system instability, particularly in large-scale power systems. To tackle WABP delays, the paper introduces a three-stage integer linear programming (ILP) approach for optimal phasor measurement unit (PMU) placement and system partitioning, ensuring maximum observability with minimal redundancy and cost. This method includes optimizing PMU allocation, determining protection area boundaries, and specifying communication link locations. Incorporating zero-injection buses into PMU placement further reduces the number of required PMUs and overall costs, enhancing the efficiency of WABP deployment. The strategy also accounts for communication delays and latency constraints, ensuring fast fault detection and tripping signal transmission to maintain grid stability. Additionally, the paper improves fault detection accuracy through indirect voltage measurements, boosting the WABP system’s reliability. Extensive testing of the ILP model across various systems shows that regionalizing power systems makes WABP a practical and reliable solution for transmission line protection.</p>

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Efficient synchro phasor measurement-based approach for partitioning of power network in wide-area backup protection

  • 期刊论文

  • 发表日期：

    2026年4月21日

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  • Gholamhossein Khandar Shahabad,
  • Jamal Beiza,
  • Jaber Pouladi,
  • Taher Abedinzadeh

摘要

This paper explores advancements in wide-area measurement systems (WAMS) to enhance backup protection for transmission networks, addressing challenges posed by delays in data transmission, communication, and algorithm execution. Wide-area backup protection (WABP) operates within a few hundred milliseconds. It prevents the protection system misoperation and mitigate system instability, particularly in large-scale power systems. To tackle WABP delays, the paper introduces a three-stage integer linear programming (ILP) approach for optimal phasor measurement unit (PMU) placement and system partitioning, ensuring maximum observability with minimal redundancy and cost. This method includes optimizing PMU allocation, determining protection area boundaries, and specifying communication link locations. Incorporating zero-injection buses into PMU placement further reduces the number of required PMUs and overall costs, enhancing the efficiency of WABP deployment. The strategy also accounts for communication delays and latency constraints, ensuring fast fault detection and tripping signal transmission to maintain grid stability. Additionally, the paper improves fault detection accuracy through indirect voltage measurements, boosting the WABP system’s reliability. Extensive testing of the ILP model across various systems shows that regionalizing power systems makes WABP a practical and reliable solution for transmission line protection.