Power flow control in networks using controllable network transformers

Das, Debrup; Divan, Deepak; Harley, R.G.

doi:10.1109/tpel.2010.2042076

Cited by 60 publications

(15 citation statements)

References 6 publications

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“…16-19. This is a byproduct of the VQS modulation method, as explained in [7], and would need to be filtered out in a practical application, as demonstrated by [2]. As shown in Fig.…”

Section: B Issues With Harmonics and Resonancesmentioning

confidence: 99%

“…This phenomenon was not noticeable at the lower power level tests performed in [5], and is due to the voltage drop across the impedance of the source and power transformers from the third harmonic current. Filtering of the third harmonic current as in [2] will also solve the voltage harmonic issue.…”

Section: B Issues With Harmonics and Resonancesmentioning

confidence: 99%

“…To drive adoption of power flow controllers among utilities, a solution for power flow control that is low in cost, easy to integrate, and does not lower overall system reliability is needed. One attractive solution that exists in literature is the controllable network transformer (CNT), which adds a direct-ac/ac, fractionally-rated power electronics converter to an LTC transformer to achieve grid power control [2]. The design and initial testing of an AC-PEBB for a CNT application is outlined previously by the authors in [3].…”

Section: Introductionmentioning

confidence: 99%

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Validation of the plug-and-play AC/AC power electronics building block (AC-PEBB) for medium voltage grid control applications

Iyer

Moghe

Kandula

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

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As ac-to-ac power conversion becomes increasingly importantly in applications such as grid power control and motor control, demand for a plug-and-play converter has been increased. Traditional VSI-based ac-to-ac power converters such as the back-to-back converter require bulky dc-link capacitors that limit their reliability. This paper examines a plug-and-play concept for achieving ac-to-ac power conversion via the direct-ac/ac power electronic building block (AC-PEBB). The AC-PEBB is a compact, self-contained cell requiring no energy storage. It can be used in a variety of direct ac/ac converters including matrix converters, controllable network transformers (CNT), etc. This paper details the design of an 800 V, 100 A AC-PEBB prototype to be used in a 13 kV, 1 MVA application. Successful test results using several AC-PEBBs in a variety of configurations are demonstrated at up to 11 kV and 600 kVA.

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“…16-19. This is a byproduct of the VQS modulation method, as explained in [7], and would need to be filtered out in a practical application, as demonstrated by [2]. As shown in Fig.…”

Section: B Issues With Harmonics and Resonancesmentioning

confidence: 99%

Section: B Issues With Harmonics and Resonancesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Validation of the plug-and-play AC/AC power electronics building block (AC-PEBB) for medium voltage grid control applications

Iyer

Moghe

Kandula

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

View full text Add to dashboard Cite

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“…The CNT is realized by augmenting an existing load tap changer (LTC) with a thin ac converter (TACC), as shown in Figure 1 [2]. The TACC is realized using bidirectional AC switches S 1 and S 2 , and passive filter elements L f and C f .…”

Section: Cnt Basicsmentioning

confidence: 99%

“…The real power through the tie line with CNT is given by (2). The sending end and receiving end reactive power equations are given by (3) and (4).…”

Section: A Power Flow Through Cntmentioning

confidence: 99%

Implementation of loadflow for networks with controllable network transformers

Das

Divan

Harley

2013

2013 North American Power Symposium (NAPS)

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Traditional power system tools like loadflow are designed for systems with largely passive transmission and distribution assets. However, as the grid becomes smarter, more T&D assets are expected to be controllable. Tools such as loadflow and optimal power flow have to be modified to adapt to such "smart and controllable" grids. Controllable Network Transformers (CNTs) are low-cost power flow controllers that can be realized by augmenting an existing load tap changer by a direct AC-AC converter. This paper proposes a method for implementation of loadflow of networks with CNTs. The proposed method is applied to the IEEE 30 bus system and the results of the same are also presented.

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