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A Study on the Out-of-Step Detection Algorithm Using Time Variation of Complex Power-Part II: Out-of-Step Detection Algorithm and Simulation Results

Author

Listed:
  • You-Jin Lee

    (KEPCO Research Institute (KEPRI), Daejeon 34056, Korea)

  • O-Sang Kwon

    (Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16410, Korea)

  • Jeong-Yong Heo

    (Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16410, Korea)

  • Chul-Hwan Kim

    (Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16410, Korea)

Abstract

One of the established unstable power swing (out-of-step) detection algorithms in micro grid/smart grid power systems uses a trajectory of apparent impedance in the R-X plane. However, this algorithm is not suitable for fast out-of-step conditions and it is hard to detect out-of-step conditions exactly. Another algorithm for out-of-step detection is using phasor measurement units (PMUs). However, PMUs need extra equipment. This paper presents the out-of-step detection algorithm using the trajectory of complex power. The trajectory of complex power and generator mechanical power is used to identify out-of-step conditions. A second order low pass digital filter is used to extract the generator mechanical power from the complex power. Variations of complex power are used to identify equilibrium points between stable and unstable conditions. The proposed out-of-step algorithm is based on the modification of assessment of a transient stability using equal area criterion (EAC). The proposed out-of-step algorithm is verified and tested by using alternative transient program/electromagnetic transient program (ATP/EMTP) MODELS.

Suggested Citation

  • You-Jin Lee & O-Sang Kwon & Jeong-Yong Heo & Chul-Hwan Kim, 2020. "A Study on the Out-of-Step Detection Algorithm Using Time Variation of Complex Power-Part II: Out-of-Step Detection Algorithm and Simulation Results," Energies, MDPI, vol. 13(7), pages 1-15, April.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:7:p:1833-:d:343742
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    Cited by:

    1. You-Jin Lee & Jeong-Yong Heo & O-Sang Kwon & Chul-Hwan Kim, 2020. "A Study on an Out-of-Step Detection Algorithm Using the Time Variation of Complex Power: Part I, Mathematical Modeling," Energies, MDPI, vol. 13(16), pages 1-12, August.

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