Your browser does not support JavaScript!
http://iet.metastore.ingenta.com
1887

access icon openaccess A direction element using high frequency transient energy in distribution network with distributed generation

This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
Received 04/09/2018, Accepted 19/09/2018, Published 23/10/2018

The accessing of distributed generation resources to distribution network leads to a multi power grid structure. The direction of power flow changes with it. The photovoltaic (PV) generation contains a large number of power electronic devices and control links, which causes that the output responses and fault characteristics are significantly different from the synchronous machine. In consideration of the topological structure of the distributed distribution network, this paper analyses the differences of transient characteristics of AC distribution line with PV power supply between internal and external faults. Then, a new principle for constructing directional element using transfer and consumption characteristics of high-frequency transient energy is proposed. This directional element only uses high-frequency transient fault voltage and current in early stage, which can reliably distinguish the fault direction. What's more, the existence of transition resistance will be conducive to the judgement. Finally, corresponding simulation cases were carried out to verify the feasibility and superiority of the proposed directional element.

Inspec keywords: distributed power generation; power system transients; photovoltaic power systems; fault location; power transmission lines; power distribution lines; power grids; power system faults

Other keywords: internal faults; transient characteristics; fault direction; consumption characteristics; external faults; power flow changes; PV power supply; distributed distribution network; topological structure; fault characteristics; control links; photovoltaic generation; directional element; power electronic devices; high frequency transient energy; high-frequency transient energy; distributed generation resources; multipower grid structure; AC distribution line

Subjects: Solar power stations and photovoltaic power systems; Distributed power generation; Power system protection; Distribution networks

References

    1. 1)
      • 7. Li, X.-P., He, Z.-Y., Wu, X., et al: ‘Ultra high speed directional element based on amplitude comparison using S-transform energy relative entrop’, Autom. Electr. Power Syst., 2014, 38, (14), pp. 113–117.
    2. 2)
      • 4. Ge, Y.-Z. ‘The principle and technology of New relay protection and fault location’ (Xi'an Jiaotong University Press, Xi'an, 2007, 2nd edn.).
    3. 3)
      • 5. Shen, G.-R.: ‘A New directional relay based on the variation of power frequency components’, Autom. Electr. Power Syst., 1983, 7, (1), pp. 28–38.
    4. 4)
      • 8. Kong, F., Zhang, B.-H., Wang, Y.-T., et al: ‘Ultra-high-speed directional element of relay protection for HVDC transmission line’, Electr. Power Autom. Equip., 2014, 34, (8), pp. 83–88.
    5. 5)
      • 12. Eissa, M.M., Hasan, S., Saleh, S.S.: ‘A new digital filter directional relay technique using active/reactive power portrait’, Int. J. Electr. Power Energy Syst., 2017, 86, pp. 33–52.
    6. 6)
      • 9. He, B.-T., Jin, H.-F., Liu, J.: ‘Principle and property research of the energy directional protection’, Proc. CSEE, 1997, 17, (3), pp. 166–170.
    7. 7)
      • 11. Liu, H.-F., Wang, Z.-P., Liu, H.-Q., et al: ‘Improved energy directional protection and its application in UHV transmission lines’, Power Syst. Technol., 2010, 34, (10), pp. 185–191.
    8. 8)
      • 1. Tian, C.-W.: ‘Fault Direction Element Studies for Smart Distribution Grid with DG’. Master thesis, Shandong University, 2014.
    9. 9)
      • 2. Zhang, B.-H., Yin, X.-G.: ‘Power system protective relaying’ (China Electric Power Press, Beijing, 2009, 2nd edn.).
    10. 10)
      • 10. Wang, Y., Pan, P.-F., Kong, F.-F., et al: ‘Simulation analysis of transient energy directional element based on recursive median filter’, Power Syst. Protect. Control, 2010, 38, (7), pp. 29–31, 41.
    11. 11)
      • 3. Gu, B., Tan, J., Wei, H.: ‘High speed directional relaying algorithm based on the fundamental frequency positive sequence superimposed components’, IET Gener. Transm. Distrib., 2014, 8, (7), pp. 1211–1220.
    12. 12)
      • 6. Dong, X.-Z., Luo, S.-X., Shi, S.-X., et al: ‘PCTDR-based directional comparison pilot protection technology and its application in 750 kV transmission lines’, Electr. Power Autom. Equip., 2015, 35, (9), pp. 1–5.
http://iet.metastore.ingenta.com/content/journals/10.1049/joe.2018.8868
Loading

Related content

content/journals/10.1049/joe.2018.8868
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
Print this page
This is a required field
Please enter a valid email address