Selecting the best point of connection for shunt active filters in multi-bus power distribution systems

Morán, L.; Mahomar, J.; Dixon, J.

doi:10.1109/ias.2002.1043763

Cited by 12 publications

(4 citation statements)

References 11 publications

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“…It also denotes the relation between the line voltage and line current and corresponding phase angle between them [16]. The PF is defined in literature as Equation 1 [17,18].…”

Section: Background Overview 21 Definition Of Power Factor and Totalmentioning

confidence: 99%

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Reactive power and harmonic compensation: A case study for the coal-mining industry

Roos

Bansal²

2019

J. energy South. Afr.

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This study reports on a case study in Grootegeluk Mine: Exxaro Coal, Lephalale, South Africa, in terms of power factor correction (PFC), load flow, harmonic frequency scans and harmonic voltage distortion analyses. The DIgSilent PowerFactory software was used for network simulations. Harmonic and reactive power compensation techniques were compared in terms of filter type evolution and technology advancement, with the use of simple trade-off criteria such as cost-effectiveness versus performance. It was found that both passive and hybrid filters were more favourable and could effectively compensate all voltage and current harmonics and reactive power for large nonlinear loads. The installation of switched PFC filter banks tuned at the fifth harmonic order accommodates future network growth and this solution can be rolled out to any mining industry as a benchmark to lower energy cost and maximise savings achievable on the electricity bill.

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“…It also denotes the relation between the line voltage and line current and corresponding phase angle between them [16]. The PF is defined in literature as Equation 1 [17,18].…”

Section: Background Overview 21 Definition Of Power Factor and Totalmentioning

confidence: 99%

“…Line voltage and line current become distorted because of the nonlinear load. Equations 3 and 4 give the Fourier expansion representations for the line current and line voltage, respectively [16][17][18].…”

Section: Background Overview 21 Definition Of Power Factor and Totalmentioning

confidence: 99%

Reactive power and harmonic compensation: A case study for the coal-mining industry

Roos

Bansal²

2019

J. energy South. Afr.

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“…Various solutions are reported in the literature for addressing the aforementioned instability problem [14,[16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. In [16][17][18][19][20][21][22], it has been reported that the instability problem can be avoided by repositioning the PFC capacitors at a point which is upstream to the point of sensing of the load current. By employing this scheme it is ensured that the current drawn by the PFC capacitors does not get included in the feedback path of the harmonic compensation loop.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the stability of active harmonic filter using artificial neural network‐based current control scheme

Vaidya

Chatterjee

2020

IET power electron.

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A combination of shunt active harmonic filter (SAHF), and adjustable power factor correction (PFC) capacitors is generally employed in industrial applications to achieve cost effective solution for the load compensation. It has been experienced that SAHFs operating in conjunction with PFC capacitors may lose their stability while compensating certain harmonic components which are near the resonant frequency of the network. This resonant frequency is not known beforehand while designing the controller of the SAHF, and further it keeps on varying with time as the value of PFC capacitors vary based on the reactive power requirement of the load. Therefore, the conventional controllers having predetermined values for gains fail to stabilise the operation of the SAHF under varying operating conditions of the network. This necessitates the involvement of an adaptive control mechanism within the SAHF with which the SAHF exhibits stable operation even under varying network conditions. In order to accomplish this requirement an artificial neural network-based control scheme is proposed in this study. The proposed scheme is verified by conducting thorough simulation studies. The viability of the proposed scheme is also confirmed by carrying out detailed experimental studies on a laboratory prototype.

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“…It has been reported in the literature that irrespective of the type of the current control scheme being employed for an AHF, the presence of PFC capacitors affects the operational behaviour of the AHF [34–58]. The operation of AHF can become unstable while compensating certain higher‐order harmonic components.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the stability of AHF

Vaidya

Chatterjee

2019

IET Power Electronics

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Active harmonic filters (AHFs) have a problem of losing their stability when they are installed in a distribution network having power factor correction (PFC) capacitors. This study has made an effort to assess the stability margin of an AHF installed in a distribution network along with PFC capacitors. After establishing the underlying cause of instability, an attempt has been made in this study to propose a control algorithm, so that the problem of instability is overcome when these AHFs are made to operate in tandem with PFC capacitors. The effectiveness of the proposed control algorithm is established by carrying out detailed simulation studies of the system. A 30 kVA laboratory prototype of the AHF has been fabricated. Detailed experimental validations have been carried out utilising the aforesaid prototype to confirm the viability of the proposed scheme. Nomenclature List of symbols K P proportional gain of the controller K R resonant gain of the controller ω n resonant frequency of the controller ω b bandwidth around the resonant frequency T one switching period of the inverter ϕ phase angle of the network at the nth harmonic frequency ϕ L phase angle of the nth harmonic load current component ϕ T phase angle of the test current generated by the active filter

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Selecting the best point of connection for shunt active filters in multi-bus power distribution systems

Cited by 12 publications

References 11 publications

Reactive power and harmonic compensation: A case study for the coal-mining industry

Reactive power and harmonic compensation: A case study for the coal-mining industry

Enhancing the stability of active harmonic filter using artificial neural network‐based current control scheme

Enhancing the stability of AHF

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