DE102012202273A1 - Transformer arrangement for the local grid voltage supply - Google Patents

Transformer arrangement for the local grid voltage supply

Info

Publication number
DE102012202273A1
DE102012202273A1 DE201210202273 DE102012202273A DE102012202273A1 DE 102012202273 A1 DE102012202273 A1 DE 102012202273A1 DE 201210202273 DE201210202273 DE 201210202273 DE 102012202273 A DE102012202273 A DE 102012202273A DE 102012202273 A1 DE102012202273 A1 DE 102012202273A1
Authority
DE
Germany
Prior art keywords
voltage
control
transformer arrangement
transformer
local network
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
DE201210202273
Other languages
German (de)
Inventor
Karsten Handt
Detlev Zink
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE201210202273 priority Critical patent/DE102012202273A1/en
Publication of DE102012202273A1 publication Critical patent/DE102012202273A1/en
Ceased legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M5/00Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02Conversion 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
    • H02M5/04Conversion 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
    • H02M5/10Conversion 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
    • H02M5/12Conversion 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P13/00Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
    • H02P13/06Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by tap-changing; by rearranging interconnections of windings

Abstract

Transformer arrangement for the local grid voltage supply, comprising: - a transformer for converting a primary voltage in the form of a medium voltage in the range of 1 kV to 50 kV in a relation to the primary voltage lower secondary voltage to the local power supply, - an adjusting device for adjusting the ratio between the primary voltage and the Secondary voltage, - a control device for detecting the voltage of at least one of the phases and for controlling the adjusting device based on the detected voltage, wherein the control is such that a deviation of voltage values occurring in the local network are reduced by a predetermined target voltage value for the local network.

Description

  • The invention relates to a transformer arrangement for the local grid voltage supply and to a method for operating a transformer arrangement for the local grid voltage supply.
  • Conventional fossil fuel generation, for example, was virtually 100% centralized and current power grids are designed for this situation. It is always to be expected with a voltage drop from the grid transformer to the terminals such as private households.
  • Currently, however, the generation of electricity from renewable sources is growing rapidly. In contrast to the traditional generation of electricity, a not inconsiderable part of the generation of electricity from renewable sources takes place locally, for example in private households or small plants.
  • As a result, it can increasingly come to the previously impossible situation that reverses the voltage drop along spurs in the local network, for which, however, the local network is not designed. The result is voltage overshoots in the local network, which can exceed the limit of 10% of the nominal voltage. Even in the medium-voltage network voltage overshoots are possible, for example, by connected wind turbines. These also entail an increased voltage in the low-voltage network (local area network).
  • One known way to deal with these problems is to significantly expand the local area networks, i. an increase in the cable cross-section laid in the local network. This leads to a reduction of the voltage drop across the cables and thus also to a reduction of voltage overshoots in the local network. However, this is associated with a considerable effort.
  • It is an object of the present invention to provide a transformer arrangement and a method for operating the transformer arrangement, with which the above-mentioned problem is reduced.
  • This object is achieved by a transformer arrangement having the features of claim 1. One solution to the method is a method having the features of claim 8.
  • The transformer arrangement according to the invention for the local grid voltage supply has a transformer for converting a primary into a relative to the primary voltage lower secondary voltage to the local power supply. The primary voltage is a medium voltage in the range of a few kV, for example 10 kV, 20 kV or 30 kV. The secondary voltage is a voltage for the local supply of a local network or urban network, for example, 230V single-phase at 400V line-to-line voltage.
  • The transformer arrangement further comprises an adjusting device for adjusting the ratio between the primary and the secondary voltage. This will typically be designed so that the secondary voltage can be varied in steps. Furthermore, the transformer arrangement comprises a control device for detecting the voltage of at least one of the phases. The detection can be done on the side of the primary voltage. However, the detection of the voltage is preferably carried out on the secondary side, since it is advantageous due to the lower secondary voltage, a lower measurement cost is required.
  • The control device controls the adjusting device on the basis of the measured value (s), the control taking place in such a way that a deviation of voltage values occurring in the local network from a predefinable setpoint voltage value for the local network is reduced.
  • In the method according to the invention for operating a transformer in a transformer arrangement for the local grid voltage supply, which is designed to convert a primary voltage into a secondary voltage that is lower than the primary voltage, the following steps are carried out:
    • Detecting the voltage of at least one phase by means of a control device provided locally in the transformer arrangement,
    • Comparison of the detected values for the voltage with nominal values and determination of a control signal from the comparison by means of the control device,
    • - Control of a locally provided in the transformer adjusting device for adjusting the height of the secondary voltage based on the control signal.
  • Advantageously, this achieves an adaptation of the work of a transformer in such a way that overvoltages in the local network are avoided. This is true even when there is a return of energy from decentralized regenerative energy producers to the medium-voltage level.
  • In a particularly advantageous embodiment of the invention, adjusting device, control device and transformer are constructed in the immediate vicinity of each other. You can, for example, form a structural unit, so be designed as a total device. Alternatively, you can For example, the controller be an external and separate from the transformer device, but which is located in the immediate vicinity of the transformer.
  • As a result, it is advantageous to control the work of the transformer exclusively from information available locally at the transformer by detecting and processing the voltage in the region of the transformer. A remote control is so advantageous not required. Similarly, no telemetry of voltage data, for example, is required.
  • The following two embodiments are possible individually or together:
    The measurement of the voltage has the following purpose: By measuring the voltage of at least one of the phases is determined whether on the medium voltage level, a change in voltage has occurred with respect to the setpoint, for example by feeding from wind turbines or in the event of an error, ie when a short circuit occurs , Since the height of the medium voltage directly affects the level of the low voltage, a correction by the adjusting device is advantageous here.
  • In one embodiment of the invention, the detection of the voltage is performed for all phases. It is particularly advantageous if, in addition to the absolute values of the voltage, the spread of the values, i. Distance between the measured voltages is taken into account when controlling the actuator.
  • In addition to the measurement of the voltage, a measurement of the current can also take place: By means of the measurement of the current on at least one of the phases, it is determined how the load situation is on the side of the low voltage. The measured current is the difference between consumed and generated electricity in the local network. Depending on the load situation in the local network, the voltage in the local network drops or rises, with the change in the voltage usually increasing with the distance from the transformer.
  • Both the voltage and the current can be measured instead of a measurement on one of the phases on all three phases. Such a measurement has the advantage that the control device can take into account all voltages and currents. It is therefore impossible to overlook changes in the load situation in the local network or medium voltage because they occur in the wrong phase. Furthermore, it is advantageous that a spread of the measured values for the phases can be taken into account. By spreading is meant, for example, the difference between the largest and smallest value.
  • In a development of the invention, a three-phase detection of the current takes place in at least one, in particular all, output lines of the secondary side of the transformer arrangement. In other words, the current is no longer detected on the busbar for the entire secondary side, but separated in the individual branch lines. Again, this can be done in addition to the single-phase measurement three-phase. This makes it possible to more accurately determine the load situation in the local network. Thus, for example, a compensation of a voltage change can be made, which would not have been noticed in a measurement on the busbar. Likewise, it can be avoided that a compensation of a voltage change is carried out, which causes on average an approximation to the target voltage, but for individual parts of the local network a leaving the allowable voltage range of 100% +/- 10% of the target voltage causes.
  • The adjusting device is designed in an advantageous embodiment such that it allows an increase of the local network voltage of the transformer by a fixed amount or relative value and a decrease by the same amount or relative value. That There are exactly three voltage levels available.
  • Further expedient embodiments and advantages of the invention are the subject of the following description of embodiments of the invention with reference to the figures of the drawing, wherein like reference numerals refer to the same components. Show
  • 1 a transformer arrangement,
  • 2 a course of electricity in the local network against maximum change in the voltage in the local network.
  • 1 shows a transformer assembly 14 according to a first embodiment. The transformer arrangement 14 includes a transformer 20 for three-phase conversion of a medium voltage using three medium-voltage connections 15 is supplied from the nationwide medium voltage supply, in a low voltage for the supply of local network sections 10 ... 12 a local network. The medium voltage should be 20 kV in this example, while the low voltage is the usual three-phase supply in Germany with 230 V against the neutral conductor. The transformer 20 is on the input side with the medium-voltage connections 15 and on the output side with busbars 24 connected to the distribution of low voltage.
  • From the busbars 24 off consist of the usual connections to the local network sections 10 ... 12 of the local network. These city network sections 10 ... 12 In the present example, each comprises a number of private households supplied with low voltage. In this example, some of the households have photovoltaic systems, for example, and can thus generate and feed back electricity. Both the consumption of energy on the part of households and the feed back changes the voltage in parts of the respective local network section 10 ... 12 , The most obvious change is usually at the point of the local loop 10 ... 12 , the furthest from the transformer assembly 14 is removed.
  • 2 shows a modeling of the influence of feed and feedback on the voltage in a local network section 10 ... 12 , The graph of 2 shows on the x-axis the current that enters the local area section 10 ... 12 flows or is fed back by this and on the y-axis, the relative change of the voltage at the farthest point of an imaginary network section 10 ... 12 through the flow of electricity. This was a first extreme 22 calculated from the assumption of the maximum load, ie the maximum conceivable consumption of all connected consumers without any decentralized energy generation and regeneration. A current of 220 A flows into the local network section 10 ... 12 , The relative voltage change in this case is 1.5%; the voltage is thus at the furthest point of the local network section 10 ... 12 about 1.5% less than the transformer.
  • A second extreme 23 was determined from the worst-case assumption of maximum regeneration without load. It was assumed that a recovery of 650 A, which leads to a voltage increase at the farthest point of 3.5%. The resulting points were characterized by a characteristic curve 21 connected. The actual change in voltage will usually be less than that at the extreme points due to the mixing of feed back 22 . 23 but the characteristic 21 allows an assumption of the voltage change from the current on the transformer assembly 14 flows.
  • The transformer arrangement 14 contains a control device 18 , designed for three-phase measurement of the current in the local network sections 10 ... 12 , The control device 18 is in a convenient way with the busbars 24 connected. The measured current values are sent to a control device 18 passed, with which the control device 18 connected is.
  • In addition, the controller measures 18 the voltage of a phase at the busbars 24 , Both the controller 18 as well as the voltage measuring device 17 are in the transformer arrangement 14 realized and arranged and access to the measurement only on there existing connections and lines. So there is no need to connect to the outside or provided.
  • The control device 18 is designed to evaluate the incoming measured values. Thus, the voltage value is compared with the reference voltage value of 230 V or 400 V. If there is a change in the medium voltage, this is via the transformer 20 passed directly to the low voltage side. Therefore, the controller determines 18 whether a measure must be taken to adjust the low voltage. Furthermore, the measured values for the low-side current become the characteristic curve 21 evaluated and used to determine the voltage change resulting from load and power generation on the low-voltage side. Both voltage changes, so the medium voltage as well as from the local network sections 10 ... 12 themselves, are considered together.
  • For example, the strongest voltage deviation from the set point in the various local network sections 10 ... 12 determined. If this exceeds a threshold value, then the control device ensures 18 for a change in tension. The control device checks in this example also, if taken together, one of the voltages at the farthest point local network sections 10 ... 12 leaves the permitted range of +/- 10% of the setpoint voltage even after the voltage has changed. In other words, the controller takes into account 18 also the spread of the measured current values, ie their distance from each other. For example, assigns one of the local area sections 10 ... 12 a significant increase in voltage and another of the local network sections 10 ... 12 a significant decrease in voltage, so an adjustment of the voltage may not make sense.
  • In this case, it is possible that the transformer assembly 14 has a possibility to give a warning signal to a control center or to save the problem situation in a log for later evaluation.
  • In order to achieve an adaptation of the voltage, the control device controls 18 an adjusting device 19 , This adjusting device 19 fits the turns ratio of the voltage converter 20 at. In the present example, the actuator is 19 designed in addition to the normal turns ratio for the transformation of the medium voltage to the low voltage at each setpoint also transformations to 6% more or 6% to be able to make less tension. Thus, the control device in the present example make a circuit to more voltage, if, for example, a lowered medium voltage and a strong feed on the local network side a summed voltage change of more than 9% - far from the transformer assembly 14 - results. After increasing the voltage by means of the adjusting device 19 by 6% then remains a voltage near the transformer assembly 14 in exemplary figures - 2% higher than the nominal voltage and far from the transformer 14 lowered by about 3% compared to the setpoint voltage.
  • The adjusting device 19 , the control device 18 and the transformer 20 are advantageously implemented in a local context, for example as a transformer station. The transformer arrangement 14 is thus independent of external signals, ie it does not require externally given commands and no external measurement signals. It is convenient to the in 2 shown characteristic for each of the local network sections 10 ... 12 to determine and deposit in the transformer arrangement, for example in a memory unit of the control device 18 ,
  • The transformer arrangement 14 This example performs a single-phase voltage measurement to detect changes in the mean voltage. In addition, a three-phase measurement of the current in the direction of the local network sections 10 ... 12 performed. This is an advantageous compromise of accuracy of measurement against effort. Towards the medium voltage side, it is typically sufficient to measure single-phase. On the side of low voltage, on the other hand, it is more likely that differences in the current flow will occur between the phases. The measurement in all phases takes these differences into account.
  • However, there are deviating from the described embodiment, other design options. These are briefly described below. The components present in the exemplary embodiment remain largely the same.
  • So it is also possible to measure the voltage of all phases. In this way it can be achieved that differences in the voltage between the phases are also recognized there. Thus, it is possible to react in a more precise manner to the absolute values and also to the spread of the voltage values. For this purpose, the control device 18 adjust accordingly; the evaluation of an increased number of measured values must be made.
  • Furthermore, in the sense of a simplification, instead of the three-phase current measurement, a single-phase current measurement can be carried out. This reduces the measurement and evaluation effort. Certain operating situations on the part of the low voltage are not detected in this case.
  • An expansion of the detection possibilities of the transformer arrangement 14 This makes it possible that the current measurement on the low-voltage side is no longer at the busbar 24 but even individually for each of the local network sections 10 ... 12 is carried out. This will become a value for each of the local area sections 10 ... 12 won and the transformer arrangement 14 can react with increased accuracy or more accurately recognize problem situations in which the control options are no longer sufficient.
  • Even more accurate is the evaluation of the situation of the Ortsnetzabschnitte 10 ... 12 if the current measurement not only individually for the local area sections 10 ... 12 but also for each of the phases is carried out. As a result, the measurement cost is increased again, but the situation of the district network sections 10 ... 12 can be determined very accurately. Unfavorable voltage adjustments by the controller 18 This will almost completely avoidable and adjustments in the local network - if the transformer arrangement 14 Saving or reporting problems - simplified, because the problems are already more accurately known. Unfavorable voltage adjustments are, for example, those in which the voltage profile in one of the local network sections 10 ... 12 is improved, but at the same time the voltage in another of the local network sections 10 ... 12 violated the tolerance limits.
  • It is apparent to those skilled in the art that the current measurement - unless they are individually per local network section 10 ... 12 should be done - on both sides of the voltage converter 20 can be done. Likewise, the voltage measurement can basically on both sides of the voltage converter 20 respectively. The measured values must be evaluated and converted in a manner known per se. However, the measurement on the side of the medium voltage brings an increased effort with it.
  • As a further simplification of the transformer shown 14 the current measurement can be omitted altogether. In this case, the situation on the low-voltage side will not be further evaluated. The still existing voltage measurement allows a reaction to changes on the medium voltage side. The voltage measurement can be carried out as already stated single-phase or three-phase.

Claims (15)

  1. Transformer arrangement ( 14 ) for the local power supply, comprising: - a transformer ( 20 ) for converting a primary voltage in the form of a medium voltage in the range of 1 kV to 50 kV in a relation to the primary voltage lower secondary voltage to the local power supply, - an adjusting device ( 19 ) for adjusting the ratio between the primary voltage and the secondary voltage, - a control device ( 18 ) for detecting the voltage of at least one of the phases and for controlling the adjusting device ( 19 ) Based on the detected voltage, wherein the control is carried out such that a deviation of voltage values occurring in the local network is reduced by a predetermined target voltage value for the local network.
  2. Transformer arrangement ( 14 ) according to claim 1, in which the control device ( 18 ) is designed to detect the voltage of all phases.
  3. Transformer arrangement ( 14 ) according to claim 1 or 2, in which the control device ( 18 ) is designed for detecting the current in at least one phase, in particular in all phases.
  4. Transformer arrangement ( 14 ) according to one of the preceding claims, in which the control device ( 18 ) for single-phase detection of the current in at least one, in particular all, output lines of the secondary side of the transformer arrangement ( 14 ) to local network sections ( 10 ... 12 ) is configured.
  5. Transformer arrangement ( 14 ) according to one of the preceding claims, in which the control device ( 18 ) for three-phase detection of the current in at least one, in particular all, output lines of the secondary side of the transformer arrangement ( 14 ) to local network sections ( 10 ... 12 ) is configured.
  6. Transformer arrangement ( 14 ) according to one of the preceding claims, in which the control device ( 18 ) is designed to take into account apart from the detected values for current and / or voltage and their distances from each other.
  7. Transformer arrangement ( 14 ) according to one of the preceding claims, wherein the transformer ( 20 ), Adjusting device ( 19 ) and control device ( 18 ) are built in close proximity to each other.
  8. Method for operating a transformer ( 20 ) for the local grid voltage supply in a transformer arrangement ( 14 ), which is designed to convert a primary voltage into a secondary voltage that is lower than the primary voltage, comprising the following steps: detecting the voltage of at least one phase by means of a control device ( 18 ), - Comparison of the detected voltage with a setpoint for the local network and determination of a control signal from the comparison by means of the control device ( 18 ), - control of a control device ( 19 ) for adjusting the level of the secondary voltage based on the control signal such that a deviation of voltage values occurring in the local network is reduced by a predetermined target voltage value for the local network.
  9. Method according to claim 8, in which the voltage of all phases is detected.
  10. Method according to Claim 9, in which, in addition to the comparison with nominal values, an evaluation of the distances between the detected voltages with one another is carried out and the control signal is determined from the comparison and the evaluation of the distances.
  11. Method according to one of claims 8 to 10, wherein the current of at least one, in particular of all phases is determined.
  12. A method according to claim 11, wherein an evaluation of the distances of the detected currents with each other is carried out and in the determination of the control signal, the evaluation of the distances of the currents is taken into account.
  13. Method according to one of claims 8 to 10, wherein a single-phase current measurement in at least one, in particular all, output lines of the secondary side of the transformer arrangement ( 14 ) and the measured currents of the output lines are taken into account in the determination of the control signal.
  14. Method according to one of claims 8 to 10, wherein a three-phase current measurement in at least one, in particular all, output lines of the secondary side of the transformer arrangement ( 14 ) and the measured currents of the output lines are taken into account in the determination of the control signal.
  15. Method according to one of claims 8 to 14, wherein a local in the transformer assembly ( 14 ) adjusting device ( 19 ) as well as locally in the transformer arrangement ( 14 ) provided control device ( 18 ) be used.
DE201210202273 2012-02-15 2012-02-15 Transformer arrangement for the local grid voltage supply Ceased DE102012202273A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE201210202273 DE102012202273A1 (en) 2012-02-15 2012-02-15 Transformer arrangement for the local grid voltage supply

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE201210202273 DE102012202273A1 (en) 2012-02-15 2012-02-15 Transformer arrangement for the local grid voltage supply
EP13704926.8A EP2801148A1 (en) 2012-02-15 2013-02-13 Transformer arrangement for secondary distribution network voltage supply
PCT/EP2013/052812 WO2013120866A1 (en) 2012-02-15 2013-02-13 Transformer arrangement for secondary distribution network voltage supply
CN201380009566.4A CN104115388A (en) 2012-02-15 2013-02-13 Transformer arrangement for secondary distribution network voltage supply

Publications (1)

Publication Number Publication Date
DE102012202273A1 true DE102012202273A1 (en) 2013-08-22

Family

ID=47739238

Family Applications (1)

Application Number Title Priority Date Filing Date
DE201210202273 Ceased DE102012202273A1 (en) 2012-02-15 2012-02-15 Transformer arrangement for the local grid voltage supply

Country Status (4)

Country Link
EP (1) EP2801148A1 (en)
CN (1) CN104115388A (en)
DE (1) DE102012202273A1 (en)
WO (1) WO2013120866A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015032598A1 (en) * 2013-09-03 2015-03-12 Maschinenfabrik Reinhausen Gmbh Device and method for controlling the stability of a local network using an adjustable local network transformer

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH118811A (en) * 1926-04-10 1927-02-01 Oerlikon Maschf Circuitry for additional transformers.
DE3502889A1 (en) * 1984-07-24 1986-02-06 Mitec Moderne Ind Gmbh Transformer circuit
DE3546614C2 (en) * 1985-01-29 1990-08-09 Mitec Moderne Industrietechnik Gmbh, 8012 Ottobrunn, De Transformer circuit
DE19848428A1 (en) * 1998-10-21 2000-05-04 Thomas Klein Staged voltage maintainer for AC voltages has several transformers with staged secondary voltages that can all be switched onto or disconnected from mains voltage mutually independently
DE19933811A1 (en) * 1999-07-20 2001-02-01 Abb Research Ltd Three-phase transformer for power distribution at medium-and high-voltages, with voltage control, uses controlled converter for regulating the secondary voltage via an input-side
DE102007037277A1 (en) * 2007-08-07 2009-02-19 Kaestle, Gunnar Method and system for demand control in the low-voltage grid
DE102010015276A1 (en) * 2010-04-15 2011-10-20 A. Eberle Gmbh & Co. Kg Control / regulation of the secondary voltage of local power transformers through the use of line-commutated inverters
DE102010040969A1 (en) * 2010-09-17 2012-03-22 Siemens Aktiengesellschaft Transformer device i.e. low voltage transformer, for setting of low voltage in power supply region of supply network, has adding device designed for adding supplementary voltage on lines of secondary or primary line system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3117338C2 (en) * 1981-05-02 1990-12-20 Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De
JPS59108121A (en) * 1982-12-14 1984-06-22 Tokyo Denshi Kogyo Kk Adjusting device of alternating current voltage
DE4214431C3 (en) * 1992-04-30 1996-08-14 Reinhausen Maschf Scheubeck Step switch with motor drive
CN2168277Y (en) * 1993-05-30 1994-06-08 周楚康 Voltage-stabilizing controlling transformer
CN2328111Y (en) * 1998-05-12 1999-07-07 沈阳工业学院 Small low voltage single phase distributor automatic with voltage regulator by load
DE10119664A1 (en) * 2001-04-20 2002-11-14 Reinhausen Maschf Scheubeck Arrangement for automatic voltage regulation and motor drive for automatic voltage regulation
EP1923765A1 (en) * 2006-11-17 2008-05-21 ABB Research Ltd Voltage control for electric power systems
DE102009014243A1 (en) * 2009-03-20 2010-09-23 A. Eberle Gmbh & Co. Kg Local power transformer or circuit for electrical distribution transformer for control or regulation of voltage range of every phase for low voltage level, is provided with distribution transformer with primary and secondary coiling

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH118811A (en) * 1926-04-10 1927-02-01 Oerlikon Maschf Circuitry for additional transformers.
DE3502889A1 (en) * 1984-07-24 1986-02-06 Mitec Moderne Ind Gmbh Transformer circuit
DE3546614C2 (en) * 1985-01-29 1990-08-09 Mitec Moderne Industrietechnik Gmbh, 8012 Ottobrunn, De Transformer circuit
DE19848428A1 (en) * 1998-10-21 2000-05-04 Thomas Klein Staged voltage maintainer for AC voltages has several transformers with staged secondary voltages that can all be switched onto or disconnected from mains voltage mutually independently
DE19933811A1 (en) * 1999-07-20 2001-02-01 Abb Research Ltd Three-phase transformer for power distribution at medium-and high-voltages, with voltage control, uses controlled converter for regulating the secondary voltage via an input-side
DE102007037277A1 (en) * 2007-08-07 2009-02-19 Kaestle, Gunnar Method and system for demand control in the low-voltage grid
DE102010015276A1 (en) * 2010-04-15 2011-10-20 A. Eberle Gmbh & Co. Kg Control / regulation of the secondary voltage of local power transformers through the use of line-commutated inverters
DE102010040969A1 (en) * 2010-09-17 2012-03-22 Siemens Aktiengesellschaft Transformer device i.e. low voltage transformer, for setting of low voltage in power supply region of supply network, has adding device designed for adding supplementary voltage on lines of secondary or primary line system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015032598A1 (en) * 2013-09-03 2015-03-12 Maschinenfabrik Reinhausen Gmbh Device and method for controlling the stability of a local network using an adjustable local network transformer
CN105659463A (en) * 2013-09-03 2016-06-08 赖茵豪森机械制造公司 Device and method for controlling the stability of a local network using an adjustable local network transformer
US10027121B2 (en) 2013-09-03 2018-07-17 Maschinenfabrik Reinhausen Gmbh Method and apparatus for controlling stability of a local power grid
RU2665700C2 (en) * 2013-09-03 2018-09-04 Машиненфабрик Райнхаузен Гмбх Device and method for controlling the stability of a local network using an adjustable local network transformer
CN105659463B (en) * 2013-09-03 2018-09-18 赖茵豪森机械制造公司 Device and method for the stability for controlling local power grid using adjustable local power grid transformer

Also Published As

Publication number Publication date
CN104115388A (en) 2014-10-22
EP2801148A1 (en) 2014-11-12
WO2013120866A1 (en) 2013-08-22

Similar Documents

Publication Publication Date Title
Gao et al. An improved voltage compensation approach in a droop-controlled DC power system for the more electric aircraft
RU2605083C2 (en) Method of electric generator controlling
US9735619B2 (en) Power conversion device
Benz et al. Low voltage ride through capability of a 5 kW grid-tied solar inverter
Xu et al. DC grid management of a multi-terminal HVDC transmission system for large offshore wind farms
Papathanassiou A technical evaluation framework for the connection of DG to the distribution network
JP5926946B2 (en) Method and system for operating a power generation system
KR101628920B1 (en) Power grid frequency flexibility operation system and method using the same
JP4019150B2 (en) Distribution system information monitoring system
JP5865602B2 (en) Power exchange system for exchanging electrical energy between battery and power grid, and method for exchanging electrical energy between battery and power grid
DE19620906C2 (en) Wind farm
US7656059B2 (en) System and method for a power system micro grid
ES2361901T3 (en) Power system with capacity of bridge of equipment failures.
US8259479B2 (en) Methods and systems for operating a two-stage power converter
JP5216181B2 (en) Wind park driving method
US20120300510A1 (en) Method and apparatus for controlling a dc-transmission link
CN101682192B (en) Method and system to influence the power generation of an adjustable speed generator
CN102549902B (en) Distribution system
Safayet et al. Reactive power management for overvoltage prevention at high PV penetration in a low-voltage distribution system
CA2700248C (en) Wind park with voltage regulation of the wind energy systems and operating method
EP2506384A1 (en) System and method for operating a tap changer
Xiao et al. Multi-level energy management system for real-time scheduling of DC microgrids with multiple slack terminals
US9997922B2 (en) Method for feeding electrical power into an electrical supply network
KR20120083848A (en) Output control method and output control unit for wind power plant
JP2012120428A (en) Integration of renewable power generating technologies with integrated volt/var control systems

Legal Events

Date Code Title Description
R012 Request for examination validly filed
R002 Refusal decision in examination/registration proceedings
R003 Refusal decision now final

Effective date: 20131001