WO2016205903A1 - Estabilizadores reguladores de tensão sem reatores de transição e chave inversora de polaridade do comutador de derivacões - Google Patents
Estabilizadores reguladores de tensão sem reatores de transição e chave inversora de polaridade do comutador de derivacões Download PDFInfo
- Publication number
- WO2016205903A1 WO2016205903A1 PCT/BR2015/000093 BR2015000093W WO2016205903A1 WO 2016205903 A1 WO2016205903 A1 WO 2016205903A1 BR 2015000093 W BR2015000093 W BR 2015000093W WO 2016205903 A1 WO2016205903 A1 WO 2016205903A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- transition
- stabilizers
- coil
- reactors
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
- G05F1/14—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices
- G05F1/147—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices with motor driven tap switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
- H02M5/12—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of voltage or current amplitude only
Definitions
- the public power grid is the utility of greatest social and economic impact on the modern citizen; It is thanks to electricity that much of the personal hygiene, health, well-being, media and entertainment is maintained.
- Concessionaires must keep prices compatible with the economic conditions of users, reaching the lowest income brackets and be operationally surplus, so that governments can pay timely the financiers - usually international funds - who financed them, as well as not bringing deficits. to public accounts.
- Figure 1 schematically illustrates the power grid (1), which is fed by the high voltage of the transmission lines (2), which reaches the substations (3), where the voltage is lowered to values between 13.8kV and 34.5kV, forming the three-phase medium voltage network (4), which, as it advances in space to serve consumers (8), has its voltage regulated and stabilized by the voltage regulators (5), it then passes through the capacitor banks (6) and thus reaches the distribution transformers (7), thus maintaining the quality of the grid for consumers (8).
- Voltage regulators are individually single-phase and self-transforming, consisting of equipment designed to regulate the voltage of each of the three phases that make up the three-phase power distribution systems to predetermined values and can be applied by forming banks of three units. , to operate in three phase units, ie there is a single phase voltage regulator applied to each phase.
- This equipment is standardized by ABNT NBR 1 1809 and ANSI C.57.15 standards.
- FIG 2 illustrates the schematic of an autotransformer which is the single phase step voltage regulator A (9); we see that it consists of an excitation coil (10), connected in parallel with the medium voltage network (4) shown in Figure 1, a coil with leads (11) with its fixed contacts (12), connected in series with medium voltage network (16); we also see the polarity reversing switch (13), the transition reactor (14) and their moving contacts (15), and the voltage stabilized network (16) by the voltage regulators (5) in Figure 1 proceeds along the path shown in Figure 1 and goes to consumers (8); the mains voltage is increased as the moving contacts (15) of the transition reactor (14) are contacted with the fixed contacts (12) of the coil with leads (1 1) placed in the direction of arrow AB in this Figure 2, by an electrical-mechanical mechanism called a tap-changer, which will be described in due course in this Report.
- an electrical-mechanical mechanism called a tap-changer
- voltage sampling is done; which is sent to an electronic circuit - not shown in this Figure 2 - that performs the positioning control of the aforementioned tap-changer so that the tap suitable for correcting the voltage in the stabilized network is selected (16).
- a transition reactor (14) is installed to the moving contacts (15), which is connected to the fixed contacts (12) of the shunt coil (11), which is determined by by the electronic circuit quoted.
- the transition reactor (14) is a component composed of a coil inserted in a core independent of the core of single-phase step voltage regulator autotransformers (A) (9), and is always present in such equipment built within the State of This technique is always in series with one of the single-phase poles that make up the medium voltage three-phase network (4), shown in Figure 1.
- the tap-changer driven by its own electric motor - not shown in Figure 2 - promotes contact between the moving contacts (15). of the transition reactor (14) with the fixed contacts (12) of the shunt coil (11), which causes the voltage to be adjusted to the grid, in accordance with the quality standards that must be observed.
- FIG 3 illustrates the schematic of an autotransformer which is the single phase step B voltage regulator (9A); we see that it is composed of the same devices as the single-phase step voltage regulator autotransformer (A) (9), and the excitation coil (10) is connected in parallel with the medium voltage three-phase network (16) shown Figure 2 and the shunt coil (11) is connected in series with the network (4) of Figure 1, which goes to consumers (8) and the shunt coil (11 A) is connected in series with the three-phase network.
- medium voltage (4) This type B configuration of the single phase step voltage regulator (9A) is functionally more advanced than type A (9), but for all The effects of this patent are identical to those of the single phase step voltage regulator autotransformer type A (9).
- the moving contacts (15) of the transition reactor (14) and the fixed contacts (12) of the junction coil (11) have dimensions and spacings that allow the circuit to be always bypassed without any interruptions; thus, even during the transition between leads, the circuit is not interrupted. This continuity of the current is allowed by the presence of the transition reactor (14).
- the transition reactor (14) is always inserted in the mains circuit and generates electrical losses (l 2 R) from the core and windings.
- Figure 4 illustrates the state of the art of the operation of a tap-changer (17) applied to an exemplary single-phase step voltage regulator (9) for comparison with the advances brought to the state of the art by the subject of this article.
- Patent that will be reported in due course; in it we see the tap changer (17), the medium voltage line (4), the excitation coil (10), the tap coil (11), the polarity reversing switch (13) - which will be eliminated due to the innovations to the State of the Art brought by the object of this patent, the transition reactor (14), with its pair of movable contacts (5), which, when moving in a rotating form, having as its axis the center of the Figure 4, can make electrical contact with any of the 9 fixed contacts (12) of the tapped coil (11) as shown in Figure 5 below;
- the movable contacts (15) are driven by an electric motor, which in turn is controlled by the control system, both not shown in this Figure 4.
- transition reactor (14) also always in series with the transition reactor (14) and which, in the special case of the movable contacts (15) thereof, are in contact with the fixed contact (12) shown in the upper part of this Figure 4, specially designated as " zero contact ", the shunt coil is eliminated from the circuit and the stabilized grid (16) is the same medium voltage line (4) with the simple difference that it has placed in series, the transition reactor (14); It can be seen from Figure 4 that as the moving contacts (15) rotate clockwise, contact with the tapped coil (1) is selected in order to increase the voltage, while the opposite effect is also true.
- FIGS 5, 5A and 5B show the sequence of interaction between the fixed contacts (12) and the moving contact pair (15) of the transition reactor (14) according to the prior art.
- Figure 5 shows the pair of moving contacts (15A and 15B) both making electrical coupling with the fixed contact (12A) in the so-called steady state 1; We also see the transition reactor (14) and its output connected to the stabilized grid (16).
- Figure 5A shows the pair of moving contacts (15A and 15B) in the so-called transient state position 1; we see the movable contact (15A) coupled to the fixed contact (12A) and the movable contact (12B) without electrical coupling, isolated in the space between the fixed contacts (12).
- Figure 5B shows the form of electrical coupling between the fixed contacts (12A and 12B) and the moving contacts (15A and 15B), called steady state 2, whereby the transition reactor (14) simultaneously makes electrical couplings. with two fixed contacts, when their internal coils add and divide by two the voltage between them and takes it to the grid 16) thus making a smooth transition between the rise or fall of voltage applied to the stabilized network (16).
- State-of-the-art voltage regulating autotransformers are high-cost oil-cooled equipment and reduce the arcing that forms between fixed contacts (12) of the shunt coil (1 1) with the contacts of the transition reactor (14), where these arcs tend to destroy these contacts, which means more power outages and high maintenance costs.
- 5 a - can operate without cooling oil and decrease of electric arcs in the low voltage networks, ie, operate "dry", with savings of materials and elimination of environmental hazards caused by the entire chain of delivery of oil;
- the three autotransformers necessary for the operation of the three-phase network, due to the removal of the transition reactors, can be housed in only one box, which also houses the three switches and their respective motors or single motor, with evident reduction. in material consumption and manufacturing costs.
- Figure 6 illustrates the electrical circuit of the new design of autotransformers VOLTAGE REGULATOR STABILIZERS WITHOUT TRANSITION REACTORS AND BY-SWITCH POLARITY INVERTER (18), object of this Patent, hereinafter referred to as STABILIZERS (18), applied to autotransformers of the type.
- B (9A) of Figure 3 making sure that they can be equally applied to type A equipment of Figure 2; In it we see the medium voltage mains (4) coming from the substation (3) of Figure 1, the excitation coil (10), the shunt coil (11) with the fixed contacts (12A ...
- Figure 6 shows the absence of the polarity inverter switch (13) and the transition reactor (14), which has been replaced by the resistor (R) and is part of the moving contact (15B) and consists of a wire segment. of low ohmic resistance metal alloy, whose value is negligible, and the transition reactor (14) and polarity inverter switch (13) previously mentioned and absent in the subject of this Patent constitute about 30% of the final cost of the equipment.
- the positioning control motor (19) provided with gears for the proper positioning of the moving contacts (15), the switching controller (20) and the device responsible for adjusting the level of voltage (21) at the measuring point, which may only be a direct connection to the controller (20), if the measuring point has the same voltage level as the working voltage of the controller (20), which, from its parameters , make the necessary changes, which are made according to the following figures.
- FIGs 7, 7A, 7B, 7C and 7D illustrate a switching operation performed by the STABILIZERS (18), object of this Patent, with their controller (20), which again performs the switches that have been illustrated as prior art. 5, 5A and 5B.
- This coupling is called steady state 1 and means that when the controller (20) finishes making a coupling position change to increase or decrease the voltage value by selecting one of the fixed contacts (12) of the coil with leads (11), the movable contact (15B) is parked in the empty space between the fixed contacts (12), in this case illustrated by its position between the two fixed contacts (12A) and (12B) and therefore outside of the electrical circuit;
- Figure 7A illustrates the so-called transient state 1, in which a steady state switching 1 is taking place, wherein the moving contacts (15A) and (15B) start to disconnect the fixed contact (12A) from the STABILIZER circuit (18). ) and transfer it to the fixed contact (12B) without interrupting the current supply on the stabilized line (16); It can be seen from this Figure 7A that the moving contacts 15A and 15B are at the same time electrical coupling between the fixed contacts 12A and 12B, and it is easy to understand that the arc that forms is smaller. therefore, the electric current derives from the contact with lower electrical resistance, in this case without the resistor (R) and the supply remains constant.
- Figure 7B illustrates transient state 2, which is the only moment of switching when electrical power dissipation occurs at resistor (R), because in this case only the moving contact (15B), which contains resistor (R) , attaches to the fixed contact (12B) and keeps current flowing from the mains (4) to the stabilized network (16) without interruption;
- resistor present in the contact (15B) it is noted that the need for the resistor present in the contact (15B) to be extremely low, otherwise it would result in a sudden voltage drop during switching, something not desired in the application of the object of this patent.
- Figure 7C illustrates the so-called "transient state 3" situation in which the two moving contacts (15A) and (15B) at the same time electrical coupling to the same fixed contact (12B) causing the current to pass through the contact. lower resistance, in this case the mobile contact (15A).
- Figure 7D illustrates steady state 2, similar to Figure 7, which occurs when the switching is terminated and the equipment is ready for the next switching, either to proceed with increasing or decreasing the voltage when the steps are executed in reverse order;
- the moving contact (15B) is out of circuit and between the fixed contact (12B) and the next, the stabilized network (16) has had its voltage increased or decreased without interruption of current.
- the STABILIZERS (18) object of this Patent may be applied in single-phase manner as described in this Patent Report, wherein each phase of the network passes through a unit of the object of this Patent; Due to the reduction in the number of large parts such as the transition reactor and the polarity reversing switch, they can be built and assembled within a single box, with obvious material savings and weight reduction. In case of single-box application, each phase can have its own electric motor for its individual switching or the three-phase switching can be driven by a single electric motor, with greater material savings and operating electrical consumption.
- FIG. 8 shows an application of the STABILIZERS (18), object of this patent, to a single-phase distribution transformer with two secondary bushings;
- the references are made in the technical language of electrical engineering, a transformer (TD), whose primary winding receives the medium voltage network in its two input bushings (H1) and (H2) and whose Secondary winding provides the proper voltage for consumers through its two output bushings (X1) and (X2), and the secondary winding acts as the tapped coil to which innovations consisting of STABILIZERS (18) are applied. , object of this patent.
- Figure 9 illustrates the application of STABILIZERS (18) to a single-phase distribution transformer with three secondary bushings;
- a transformer (TD) whose primary winding is receives the medium voltage network on its two input bushings (H1) and (H2) and whose secondary winding provides the proper voltage to consumers through its three output bushings (X1), (X2) and (X3), being whereas the secondary winding with center tapping (X2) acts as the tapped coil in which they are applied to the innovations in which the STABILIZERS (18) consist.
- FIG 10 illustrates the application of STABILIZERS (18) to a single phase four transformer bushing distribution transformer;
- the references are made in the technical language of electrical engineering, a transformer (TD), whose primary winding receives the medium voltage network in its two input bushings (H1) and (H2) and whose Secondary winding provides the proper voltage for consumers through its four output bushings (X1), (X2), (X3) and (X4), with the secondary branch, secondary shunt (X2) winding acting as two coils with derivations in which they are applied to innovations consisting of the STABILIZERS (18).
- TD transformer
- FIG 11 illustrates the application of STABILIZERS (18) to a three-phase distribution transformer (DTT);
- DTT three-phase distribution transformer
- the references are made in the technical language of electrical engineering, a transformer (DTT), whose primary winding receives the three-phase medium voltage mains of triangle type, through its three input bushings. (H1), (H2) and (H3), whose secondary winding provides the proper voltage to consumers through its four output bushings (X0), (X1), (X2) and (X3), whereby the winding Three-phase secondary, star-linked, center-shifted secondary (X0) acts as three shunt coils to which the innovations consisting of the STABILIZERS (18) are applied.
- the STABILIZERS (18) can consist of a constructive variant that has one more feature that advances the state of the art, as they can also reduce their output voltage by The introduction of a third operating coil called the reverse coil, which, because it is wound in the opposite direction to the lead coil, results in a decrease in the induced voltage on the lead coil when passing through the reverse coil.
- Figure 12 illustrates a form of connection of this constructive variant, in which the STABILIZERS (18), now referred to as the STABILIZERS (18A) for differentiation;
- the STABILIZERS (18A) now referred to as the STABILIZERS (18A) for differentiation
- the substation (3) the medium voltage line (4), the switching controller (20), the excitation coil (10), the shunt coil (11), the device responsible for the adequacy of the voltage level (21) for measurement, which may only be a direct connection to the controller (20), if the measuring point has the same voltage level as the working voltage of the controller (20), the reverse coil (22), the movable contacts (15), the fixed contacts (12), with emphasis on the fixed contact (PO), which, when selected by the switching controller (19) results in a bypass of the coil with leads (1) 1) and the medium voltage grid (4) goes straight to the stabilized grid (16), passing only through the reverse coil (22), and that, in this Figure it is seen that the grid (4), to reach the stabilized mains (16) must travel through the reverse
- the operation of the STABILIZERS (18A) is as follows, that is, the preferred constructive form of the STABILIZERS (18) to which the reverse coil (22) has been added, considering that it has been designed to cause a fixed voltage drop. and equivalent to the potential difference between a certain number of fixed contacts (12) of the tapped coil leads (1) - or "taps" - of the tapped coil (1 1).
- the switching controller (19) selects the fixed contact (PO) - from the fixed contact group (12) - the voltage that will reach the stabilized network (16) is suffering a potential drop equivalent to the coil voltage drop. reverse.
- the introduction of the reverse coil (22) which results in the STABILIZERS (18A) realizes an equipment with the ability to asymmetrically regulate voltage in the mains, which can vary more widely and in different steps.
- Figure 13 illustrates a constructional variant of STABILIZERS (18) introducing an alternative form of economy in metering adequacy devices (21) consisting of STABILIZERS (18B) using a measuring coil (23) wound around the same core of the excitation coil (10).
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Ac-Ac Conversion (AREA)
- Control Of Electrical Variables (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201580080139.4A CN107710100A (zh) | 2015-06-22 | 2015-06-22 | 不具有过渡电抗器的电压调节器稳定器以及分接头变换器极性反转开关 |
BR112017026971-6A BR112017026971B1 (pt) | 2015-06-22 | 2015-06-22 | Estabilizadores reguladores de tensão sem reatores de transição e chave inversora de polaridade do comutador de derivações |
PCT/BR2015/000093 WO2016205903A1 (pt) | 2015-06-22 | 2015-06-22 | Estabilizadores reguladores de tensão sem reatores de transição e chave inversora de polaridade do comutador de derivacões |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/BR2015/000093 WO2016205903A1 (pt) | 2015-06-22 | 2015-06-22 | Estabilizadores reguladores de tensão sem reatores de transição e chave inversora de polaridade do comutador de derivacões |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016205903A1 true WO2016205903A1 (pt) | 2016-12-29 |
Family
ID=57584318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BR2015/000093 WO2016205903A1 (pt) | 2015-06-22 | 2015-06-22 | Estabilizadores reguladores de tensão sem reatores de transição e chave inversora de polaridade do comutador de derivacões |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN107710100A (pt) |
BR (1) | BR112017026971B1 (pt) |
WO (1) | WO2016205903A1 (pt) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022003402A1 (es) * | 2020-07-02 | 2022-01-06 | Prolec-Ge Internacional, S. De R. L. De C. V. | Transformador eléctrico de impedancia variable |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4081741A (en) * | 1975-10-29 | 1978-03-28 | Asea Aktiebolag | On-load tap changer |
JPS6179210A (ja) * | 1984-09-27 | 1986-04-22 | Toshiba Corp | 負荷時タツプ切換器 |
EP0712140A2 (de) * | 1994-11-08 | 1996-05-15 | MASCHINENFABRIK REINHAUSEN GmbH | Stufenschalter |
US5550459A (en) * | 1994-08-08 | 1996-08-27 | Siemens Energy & Automation, Inc. | Tap position determination based on regular impedance characteristics |
US5786552A (en) * | 1994-03-09 | 1998-07-28 | Maschinenfabrik Reinhausen Gmbh | Switching arrangement for load change-over switches of step switches and for selector switches |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2595066Y (zh) * | 2002-12-26 | 2003-12-24 | 西安森宝电气工程有限公司 | 馈线自动调压器 |
CN2678083Y (zh) * | 2004-01-16 | 2005-02-09 | 谷正国 | 小电流切换自耦式路灯变压器 |
CN104426383A (zh) * | 2013-08-29 | 2015-03-18 | 大禹电气科技股份有限公司 | 一种自耦变压器调压电路 |
CN203800619U (zh) * | 2014-05-08 | 2014-08-27 | 中国电子科技集团公司第十四研究所 | 一种三相储能变流器的并网连接电路 |
-
2015
- 2015-06-22 CN CN201580080139.4A patent/CN107710100A/zh active Pending
- 2015-06-22 BR BR112017026971-6A patent/BR112017026971B1/pt active IP Right Grant
- 2015-06-22 WO PCT/BR2015/000093 patent/WO2016205903A1/pt active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4081741A (en) * | 1975-10-29 | 1978-03-28 | Asea Aktiebolag | On-load tap changer |
JPS6179210A (ja) * | 1984-09-27 | 1986-04-22 | Toshiba Corp | 負荷時タツプ切換器 |
US5786552A (en) * | 1994-03-09 | 1998-07-28 | Maschinenfabrik Reinhausen Gmbh | Switching arrangement for load change-over switches of step switches and for selector switches |
US5550459A (en) * | 1994-08-08 | 1996-08-27 | Siemens Energy & Automation, Inc. | Tap position determination based on regular impedance characteristics |
EP0712140A2 (de) * | 1994-11-08 | 1996-05-15 | MASCHINENFABRIK REINHAUSEN GmbH | Stufenschalter |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022003402A1 (es) * | 2020-07-02 | 2022-01-06 | Prolec-Ge Internacional, S. De R. L. De C. V. | Transformador eléctrico de impedancia variable |
Also Published As
Publication number | Publication date |
---|---|
BR112017026971B1 (pt) | 2022-12-27 |
BR112017026971A2 (pt) | 2018-08-21 |
CN107710100A (zh) | 2018-02-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3232452B1 (en) | High-capacity three-phase combined type phase-shift transformer | |
US8330302B2 (en) | Device for the ignition and the start-up of silicon rods | |
BR102015021900A2 (pt) | sistema de controle de voltagem | |
CN101354956B (zh) | 大容量双器身移相变压器 | |
CN101354957B (zh) | 大容量双器身调压移相变压器 | |
BRPI0802444A2 (pt) | sistema para regulaÇço de tensço de carga em circuitos de distribuiÇço de energia e mÉtodo para regulaÇço de tensço de carga em circuitos de distribuiÇço de energia | |
RU2585007C1 (ru) | Устройство регулирования реактивной мощности электрической сети (варианты) | |
WO2016205903A1 (pt) | Estabilizadores reguladores de tensão sem reatores de transição e chave inversora de polaridade do comutador de derivacões | |
KR101483066B1 (ko) | 배전용 30kv 무부하탭절환기 | |
US20210111561A1 (en) | Systems and methods for regulating voltage along a distribution bus | |
CN103928225B (zh) | 一种将220kV无励磁调压变压器器身改造为有载调压变压器器身的方法 | |
RU119184U1 (ru) | Устройство регулирования напряжения трансформатора | |
Sweeney | Application of phase-shifting transformers for the enhanced interconnection between Northern Ireland and the Republic of Ireland | |
Kumari et al. | Multi-winding transformer based high resolution power flow controller | |
US11159091B2 (en) | Stackable isolated voltage optimization module | |
CN111446074A (zh) | 变压器 | |
RU2531389C1 (ru) | Устройство регулирования напряжения сети | |
JP2015050881A (ja) | 力率自動調整装置 | |
WO2021000610A1 (zh) | 电压平衡稳定装置及方法 | |
BR102020007075A2 (pt) | Regulador de distribuição com comutação sob carga utilizando resistor sem inserção de câmara a vácuo para a transição de tape | |
CN110556242B (zh) | 一种有载调压变压器以及调压方法 | |
McFetridge | How to reduce operations on load tap changers at distribution substation transformers | |
Chaudhary et al. | Design and Fabrication of Automatic Voltage Stabilizer using Relay-Based Tap Changing of Transformer | |
RU2549377C1 (ru) | Устройство для регулирования напряжения сети | |
RU2576630C2 (ru) | Управляемый подмагничиванием трансформатор |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15895863 Country of ref document: EP Kind code of ref document: A1 |
|
DPE1 | Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101) | ||
NENP | Non-entry into the national phase |
Ref country code: DE |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112017026971 Country of ref document: BR |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 15895863 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 112017026971 Country of ref document: BR Kind code of ref document: A2 Effective date: 20171214 |