Power electronic transformers – is it the future of power systems?
It is well known that traditional networks transformers are difficult to control as well as they increase in a significant way the size of coupling AC installations. Moreover, in no-load running they generate relatively high reactive power and may cause voltage distortion. These factors and other ob...
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| Опубліковано в: : | Технічна електродинаміка |
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| Дата: | 2012 |
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| Мова: | Англійська |
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Інститут електродинаміки НАН України
2012
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Power electronic transformers – is it the future of power systems? / R. Strzelecki // Технічна електродинаміка. — 2012. — № 2. — С. 28-29. — Бібліогр.: 5 назв. — англ |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1860237332024655872 |
|---|---|
| author | Strzelecki, R. |
| author_facet | Strzelecki, R. |
| citation_txt | Power electronic transformers – is it the future of power systems? / R. Strzelecki // Технічна електродинаміка. — 2012. — № 2. — С. 28-29. — Бібліогр.: 5 назв. — англ |
| collection | DSpace DC |
| container_title | Технічна електродинаміка |
| description | It is well known that traditional networks transformers are difficult to control as well as they increase in a significant way the size of coupling AC installations. Moreover, in no-load running they generate relatively high reactive power and may cause voltage distortion. These factors and other observed trends associated with change toward application of Smart Grids raised interest in promoting Electronics Power Interfaces for AC systems. This paper presents the idea a special kind of EPI equipments – Power Electronics Transformers.
|
| first_indexed | 2025-12-07T18:25:58Z |
| format | Article |
| fulltext |
,
28 ISSN 1607-7970. . . 2012. 2
621.3
POWER ELECTRONIC TRANSFORMERS IS IT THE FUTURE OF POWER SYSTEMS?
R.Strzelecki, prof., dr hab. in .,
Electrotechnical Institute, ul. Po aryskiego, 28, 04-703 Warszawa, Poland,
Gdynia Maritime University, ul. Morska, 81-87, 61-225 Gdynia, Poland.
It is well known that traditional networks transformers are difficult to control as well as they increase in a significant way the size of
coupling AC installations. Moreover, in no-load running they generate relatively high reactive power and may cause voltage
distortion. These factors and other observed trends associated with change toward application of Smart Grids raised interest in
promoting Electronics Power Interfaces for AC systems. This paper presents the idea a special kind of EPI equipments – Power
Electronics Transformers. References 4, figures 4.
Key words: power electronics, smart transformer, energy interface.
Fig. 1 illustrates simplified diversifi-
cation of EPI for AC systems. It should be
noted that almost each AC/AC converters
(direct and indirect) can be applied as EPI.
However, in practice, not all of the proposed
solutions are efficient and acceptable. In
particular, many solutions related to connec-
ting systems LV and MW might be debated.
In this case, due to differences in voltage, one
must apply solutions including EPI with
galvanic isolation. Such EPI, regardless of its
realization, is termed Power Electronics
Transformer (PET) [1].
Fig. 2 presented basis different
approaches to realize a PET. Realize 1 is
advantageous when unidirectional power flow
is sufficient and requirements are not very high,
and only for lower power. In other cases, in
particular if required bidirectional power flow,
realization 4 is favorable. This realization of
PET if the most flexible and can fulfill
additional functions such as improvement of
input or output power quality or attachment of
storage and renewable source in LV DC-bus.
At the same time, realization 3 with current
power electronics technology is not efficient
and nothing seems to indicate changes in the
near future [2]. This realization is not concur-
rent to realize 4. Even disregarding characte-
ristics of PE switching, PET without DC-link
cannot smoothen pulsation without instanta-
neous active power. In consequence, PET
without DC-link can improve power quality
only within the range of compensation of
instantaneous reactive power. Moreover, reali-
zation of 3 requires application of significantly
larger input and output filters than in case of
realization 4. Taking into consideration flexi-
bility and multi-functionality, the name PE
Smart Transformer (PE-ST) should be used
only for PET with realization 4 [3,4].
Fig. 3 illustrate the originally authors
idea PE-ST arrangements. In this arrange-ment,
each phase consists of M identical AC-DC-AC-Tr-AC-DC-AC converter cells, series connected on the side of the higher
voltage, and in parallel, on the side of the lower. Possible are other cell connections, by which it is always necessary to
ensure equal loading and equal voltages. In proposed PE-ST (actually investigated by authors), 3-phase modules are
connected, which in case of supply symmetry and reception prevents unnecessary pulsations of instantaneous power in
Fig. 1
Fig. 2
,
ISSN 1607-7970. . . 2012. 2 29
DC-buses. It is estimated that high
power and medium voltage PE-ST,
ensuring the same functional capa-
bilities as typical “back-to-back”
couplers, will be about one third the
size of conventional transformers
(Fig.4) [5].
1. Benysek G., Kazimier-
kowski M.P., Popczyk J., Strzelecki R.
Power electronic systems as a crucial
part of smart grid infrastructure – a
survey // Biulletin of the Polish
Academy of Science – Technical
Sciences. – 2011. – Vol.58. – No.4. –
Pp. 455–473.
2. Friedli T., Kolar J.W.
Comprehensive comparison of three-
phase AC-AC matrix converter and
voltage DC-Link back-to-back con-
verter systems // IEEE/IEEJ Int.
Power Electronics Conference. –
2010. – Pp. 1–10.
3. Inoue S., Akagi H. A
bi-directional isolated DC-DC con-
verter as a core circuit of the next-generation
medium voltage power conversion system //
Power Electronics Specialists Conference (48).
– 2006. – Pp. 314–320.
4. Staudt V., Steimel A., Wrede H.
Konzept eines mobilen elektronischen 110-
kV/mittel spannungs leistungs transformators //
Technische Innovationen in Verteilungsnetzen:
Vorträge der ETG-Fachtagung (1-2). – 2006. –
Pp. 59–66.
5. Wang J.J. at al. Smart Grid techno-
logies. Development of 15-kV SiC IGBTs and
their impact on utility applications // IEEE Industrial Electronics Magazine (6). – 2009. – Pp. 16–23.
621.3
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23.01.2012
Received 23.01.2012
Fig. 3
Fig. 4
|
| id | nasplib_isofts_kiev_ua-123456789-62089 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1607-7970 |
| language | English |
| last_indexed | 2025-12-07T18:25:58Z |
| publishDate | 2012 |
| publisher | Інститут електродинаміки НАН України |
| record_format | dspace |
| spelling | Strzelecki, R. 2014-05-16T16:21:29Z 2014-05-16T16:21:29Z 2012 Power electronic transformers – is it the future of power systems? / R. Strzelecki // Технічна електродинаміка. — 2012. — № 2. — С. 28-29. — Бібліогр.: 5 назв. — англ 1607-7970 https://nasplib.isofts.kiev.ua/handle/123456789/62089 621.3 It is well known that traditional networks transformers are difficult to control as well as they increase in a significant way the size of coupling AC installations. Moreover, in no-load running they generate relatively high reactive power and may cause voltage distortion. These factors and other observed trends associated with change toward application of Smart Grids raised interest in promoting Electronics Power Interfaces for AC systems. This paper presents the idea a special kind of EPI equipments – Power Electronics Transformers. en Інститут електродинаміки НАН України Технічна електродинаміка Електроенергетичні комплекси, системи та керування ними Power electronic transformers – is it the future of power systems? Article published earlier |
| spellingShingle | Power electronic transformers – is it the future of power systems? Strzelecki, R. Електроенергетичні комплекси, системи та керування ними |
| title | Power electronic transformers – is it the future of power systems? |
| title_full | Power electronic transformers – is it the future of power systems? |
| title_fullStr | Power electronic transformers – is it the future of power systems? |
| title_full_unstemmed | Power electronic transformers – is it the future of power systems? |
| title_short | Power electronic transformers – is it the future of power systems? |
| title_sort | power electronic transformers – is it the future of power systems? |
| topic | Електроенергетичні комплекси, системи та керування ними |
| topic_facet | Електроенергетичні комплекси, системи та керування ними |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/62089 |
| work_keys_str_mv | AT strzeleckir powerelectronictransformersisitthefutureofpowersystems |