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A combined MV and LV network voltage regulation strategy for the reduction of voltage unbalance

Conference Paper


Abstract


  • Voltage regulation is a crucial practice in distribution

    networks to ensure that the steady state voltage levels

    at customer connection points are within prescribed limits. In

    addition to ensuring required voltage levels, within a range of

    power quality problems, voltage unbalance is an important factor

    that determines the quality of supply. With regard to voltage

    regulation, one of the common methods employed by distribution

    network service providers is volt/var control. This method

    regulates the voltage of a network by controlling the voltage at

    the zone substation and by the injection or absorption of reactive

    power at different locations in the network. Typically, volt/var

    control is employed in medium voltage networks only, which

    overlooks the growth of distributed generation in low voltage

    networks. The increasing penetration of distributed generation

    may change the paradigm of voltage regulation to the extent

    that traditional volt/var control may not be effective. However,

    the effects of this increasing penetration can be countered

    by exploiting the versatility of distributed generation devices.

    This paper proposes a holistic volt/var control approach which

    takes into account voltage regulation in both medium and low

    voltage networks and voltage unbalance reduction in a low

    voltage network. The proposed control method utilises an on

    load tap changer and a fixed capacitor bank in the medium

    voltage network and also photovoltaic inverters in the low voltage

    network. The proposed control is tested on a modified IEEE 13

    node test feeder over a 24-hour period over which the load varies.

    The results demonstrated that the proposed control method

    is able to perform voltage regulation and voltage unbalance

    reduction concurrently.

Publication Date


  • 2016

Citation


  • I. Afandi, P. Ciufo, A. Agalgaonkar & S. Perera, "A combined MV and LV network voltage regulation strategy for the reduction of voltage unbalance," in International Conference on Harmonics and Quality of Power (ICHQP), 2016, pp. 318-323.

Scopus Eid


  • 2-s2.0-85009508825

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/6256

Start Page


  • 318

End Page


  • 323

Abstract


  • Voltage regulation is a crucial practice in distribution

    networks to ensure that the steady state voltage levels

    at customer connection points are within prescribed limits. In

    addition to ensuring required voltage levels, within a range of

    power quality problems, voltage unbalance is an important factor

    that determines the quality of supply. With regard to voltage

    regulation, one of the common methods employed by distribution

    network service providers is volt/var control. This method

    regulates the voltage of a network by controlling the voltage at

    the zone substation and by the injection or absorption of reactive

    power at different locations in the network. Typically, volt/var

    control is employed in medium voltage networks only, which

    overlooks the growth of distributed generation in low voltage

    networks. The increasing penetration of distributed generation

    may change the paradigm of voltage regulation to the extent

    that traditional volt/var control may not be effective. However,

    the effects of this increasing penetration can be countered

    by exploiting the versatility of distributed generation devices.

    This paper proposes a holistic volt/var control approach which

    takes into account voltage regulation in both medium and low

    voltage networks and voltage unbalance reduction in a low

    voltage network. The proposed control method utilises an on

    load tap changer and a fixed capacitor bank in the medium

    voltage network and also photovoltaic inverters in the low voltage

    network. The proposed control is tested on a modified IEEE 13

    node test feeder over a 24-hour period over which the load varies.

    The results demonstrated that the proposed control method

    is able to perform voltage regulation and voltage unbalance

    reduction concurrently.

Publication Date


  • 2016

Citation


  • I. Afandi, P. Ciufo, A. Agalgaonkar & S. Perera, "A combined MV and LV network voltage regulation strategy for the reduction of voltage unbalance," in International Conference on Harmonics and Quality of Power (ICHQP), 2016, pp. 318-323.

Scopus Eid


  • 2-s2.0-85009508825

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/6256

Start Page


  • 318

End Page


  • 323