WO2001079953A1 - Voltage adapter assembly - Google Patents
Voltage adapter assembly Download PDFInfo
- Publication number
- WO2001079953A1 WO2001079953A1 PCT/FR2001/001153 FR0101153W WO0179953A1 WO 2001079953 A1 WO2001079953 A1 WO 2001079953A1 FR 0101153 W FR0101153 W FR 0101153W WO 0179953 A1 WO0179953 A1 WO 0179953A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- value
- output voltage
- output
- adapter assembly
- Prior art date
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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
- G05F1/32—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices
- G05F1/34—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices combined with discharge tubes or semiconductor devices
Definitions
- the present invention relates to a voltage adapter assembly intended in particular, but not exclusively, to compensate for voltage variations of an electrical supply line of the electrical energy distribution network
- the power supply lines of the network deliver a voltage which evolves over time Indeed, when the power demand suddenly increases, there are voltage drops at the end of the line in particular
- Overvoltages can also be due to maneuvers on the lines, they can come from a switching at the level of the supply transformers, from the commissioning of highly inductive rotating machines, or from the imbalance of the three-phase network Or, the standards provide, for example in France in rural areas to date, that the effective voltage of the Low Voltage network must be between 230 V + 6 / -10%, that is to say between 207 and 244 V
- An object of the present invention is to provide a voltage adapter assembly capable of rapidly responding to variations in the voltage of the supply line, in particular in the event of an overvoltage, and not producing cuts or micro-cuts on the line.
- the adapter assembly comprises, a voltage adaptation device to which an input voltage VE to be adapted is applied and provided with voltage dividing means
- control means for developing information representative of the ratio k to be applied to said voltage divider, - said measurement means delivering, with a periodicity T, values of output voltages, and said control means comprising
- the measuring means which make it possible to measure the output voltage of the adapter supply information representative of said output voltage to the control means which produce information capable of applying an additional voltage to the input voltage VE in the case of '' a voltage drop compared to the nominal voltage or information capable of reducing the input voltage VE in the case of a voltage greater than the nominal voltage
- k takes negative values
- a forecast voltage called predicted voltage Vp re d is produced as a function of the output voltage values, which is an estimate of the voltage value for the future taking into account the past evolution of the voltage of output Vs This estimate makes it possible to prepare a correction to be applied to the voltage taking into account the possible drift which one notes In order to evaluate this drift, first of all, one compares the predicted voltage with a predetermined value V m m and a rapid regulation procedure is initiated
- Vpred ⁇ Vmm Vmm is a configurable threshold value below
- the adapter assembly further comprises an overvoltage switch and an anti-overvoltage resistance mounted in parallel with said primary winding of the means for summing the voltages, and means for controlling the open or closed state of said switch
- the anti-overvoltage resistance is connected to the terminals of the primary winding means for summing the voltages, so as to compensate for the drop in load This resistance thus makes it possible to damp the rise in voltage, the time that the voltage dividing means adapt to the new state of the line
- the anti-overvoltage resistance is connected to the terminals of said primary winding by a switch actuated by control means which are capable of receiving a closing signal produced by the control means.
- said means for developing a predicted voltage value means for developing a predicted voltage value
- Vpred generate a predicted voltage value Vpred at a time of
- the predicted voltage value Vpred represents a reliable value of the voltage value expected in the near future
- control means further comprise means for comparing said measured output voltage Vs with a
- V max predetermined voltage V max and means for generating a closing signal of said overvoltage switch if said output voltage is greater than V m ax
- control means analyze the output voltage Vs and a predetermined voltage V m ax corresponding to a voltage threshold not to be exceeded This voltage threshold corresponds to a certain percentage of the nominal voltage supplied by the supply line electrical
- the analysis consists in comparing the output voltage Vs with a predetermined value and in connecting the anti-overvoltage resistance if this value is exceeded.
- the measurement of the output voltage Vs and the comparison with the predetermined value Vmax are carried out at a high frequency in order to intervene very quickly on the line in the event of overvoltage
- control means further comprise means for comparing said measured output voltage Vs to
- the output voltage must also not drop below a certain voltage threshold Vmf When it is the case, an additional voltage is added to the output voltage at the output of the adapter assembly, depending on the rapid regulation mode
- the adapter assembly further comprises, in the case of a three-phase network, a plurality of means for summing the voltages on each of the phases, whereby said means for summing the voltages are physically independent on each of the phases
- FIG. 1 is a schematic view of the circuit of the voltage adapter assembly
- FIG. 2 is a schematic view of the circuit of the voltage adaptation device comprising an input, voltage dividing means, means for summing up the input voltage and means for applying the voltage Vs to the output of the adaptation device,
- FIG. 3 is a schematic view of the circuit according to FIG. 2 to which the means for measuring the output voltage have been added, the control means and the control means,
- FIG. 4 is a schematic view of a flow diagram representing the three possible regulation procedures.
- FIG. 5 is a schematic view of a flowchart representing the regulation strategy of the adapter assembly
- the adapter device has an input E for receiving an input voltage VE to be adapted which corresponds to the power supply and a output S to deliver an output voltage Vs corresponding to a suitable voltage delivered to the user
- the device also includes divider means 110 or switching transformer which is a variable ratio transformer k making it possible to develop an additional voltage Vp This
- additional voltage is equal to k VE
- the value of the additional voltage is determined by the control means 112 and by the control means 114 which determine the transformation ratio k to be applied as a function of the value of the output voltage Vs given by the measurement means 116
- the measurement could also be made at the input E of the voltage adapter assembly
- the dividing means 110 are connected to means for making the sum 118 of the input voltage VE and of a fraction k 'VQ of the additional voltage so as to obtain the output voltage VS, k' being the transformation ratio fixes means for making the sum 118 which are, in this case, a transformer with fixed ratio, called coupling transformer
- the switching transformer 210 comprises a primary winding 220 at the terminals of which the input voltage VE is applied and a secondary winding 230 comprising, for example, six division outputs 232, 234, 236, 238, 240, and, 242, respectively connected to six switches C232, C234, C236, C238, C240 and, C242, which are also connected to the output of the voltage division means 210
- a seventh switch connects the division output 232 to the output of the division means of tension 210 So, by choosing a switching of two switches, it is possible to vary the additional voltage, for example, from -8 to + 24% of the input voltage
- the coupling transformer 118 comprises a secondary winding 246 to which the complementary voltage k 'VQ is applied and a primary winding 248 to which the additional voltage is applied
- VD This transformer has a fixed ratio k 'and makes it possible to add to the
- the adaptation device comprises an overvoltage switch 250 and an anti-overvoltage resistance 252 mounted in parallel with the primary winding 248.
- measurement means 354 measure the output voltage of the adaptation device at a frequency multiple of that of the electrical network, ie for example 1000 Hz for a voltage of frequency 50 Hz, that is to say a periodicity of 1 ms
- the signal is sampled by the measuring means so as to calculate the effective value of the tension
- the measurement means 354 are able to provide a measurement of the output voltage value Vs to control means 360
- the control means 360 comprise comparison means 361 for comparing the output voltage Vs measured by the measurement means 354 with a predetermined voltage Vmax which must not be exceeded or be exceeded for the shortest possible time.
- voltage V m ax corresponds, for example, for electrical energy distributed at low voltage in France in rural areas to an excess of 6% of the nominal value 230 V, i.e. 244 V When the output voltage Vs
- means 362 generate a signal capable of ordering the control means 363 to close the anti-overvoltage switch 250
- the anti-overvoltage device is activated as a priority.
- its activation is followed by a switching process of the switches C332 and C337 so as to be on a transformation ratio K equal to 1 for a certain duration which may be equal to 1 s
- La deactivation of the over-voltage switch 350 intervenes as soon as the switching of the switches C332 and C337 has been carried out
- the control means comprise means 364 for developing a predicted voltage value Vpred at an instant of measure t to
- T being the period between two measurements of the voltage and has an integer.
- T is 1 ms and a is 10.
- Vpred is produced at an instant t, from the output voltage values measured at times t-10ms and t-20ms
- An example of calculating the predicted voltage is given by the following formula
- V 2 pred (t) 1, 8333 V 2 (t) + 0.3333 V 2 (t - 10ms) - 1, 1667 V 2 (t - 20ms)
- This predicted value corresponds to an output voltage value estimated for a determined future, taking into account the values of the output voltage at time t, at time t minus half a signal period and at l 'instant t minus a signal period
- the control means comprise comparison means 365 for comparing the predicted voltage Vp re d with a voltage
- means 368 When the predicted voltage Vpred is lower than the threshold value Vmm, means 368 generate a signal capable of supplying information to the control means 363 so that they control the switches according to a so-called regulation procedure " fast "aiming to return immediately to a Vcible value equal to the setpoint voltage Vc This setpoint will generally be chosen close to the nominal value of the network This procedure will be described in detail in the following description
- the control means also comprise means 367 for calculating the speed of variation ⁇ V of the output voltage Vs over n preceding periods and for comparing this speed of variation with a
- V v This value is taken close to the product of the nominal voltage by the quantity ⁇ K which is the difference between two consecutive ratios K
- ⁇ K the difference between two consecutive ratios K
- V v will be worth 6 V per 60 ms, the variation being measured over 3 periods of the voltage
- the means 368 develop a signal capable of supplying information to the control means 363 so that they control the closing of the switches according to a so-called rapid procedure
- ⁇ V is less than V v means 369 develop a signal capable of supplying information to the control means 363 so that the so-called "slow" procedure is continued
- the comparison means 361 also compare the output voltage Vs with a
- V s is less than V i ⁇ f
- the means 368 develop a signal capable of supplying information to the control means 363 so that they control the closing of the switches according to a so-called "rapid" procedure.
- FIG. 4 we will now refer to FIG. 4 for describe the three regulatory procedures
- the new transformation ratio will take into account the previous transformation ratio, a "target" voltage V ⁇ bie and the value of the voltage to be regulated V re g
- the value of the target voltage V C ⁇ ble may be taken equal to the value of the reference voltage, which will generally be close to the nominal network voltage
- the voltage to be regulated V reg may, for it is equal to the output voltage Vs measured at the instant t of the triggering of the rapid regulation, or the predicted voltage Vpred at this same instant
- the slow regulation comes to replace the fast regulation on the triple condition that the output voltage is not lower than V m f, that the predicted voltage is not lower than V m ⁇ n , and that the variations of the voltage of output are slow ( ⁇ V ⁇ V v ) Under these conditions, you are allowed to change the transformation ratio by one notch (that is to say, you switch to the ratio immediately lower or higher than that activated previously ) at least ntemp seconds (ntemp integer) after the previous switching of the switches The duration of this delay ntemp is calculated so as to keep the flicker below the level of annoyance (this level of annoyance is characterized by an empirical curve connecting the variation of voltage at the frequency of this variation)
- the "fast" regulation mode is the main regulation mode II is called in several cases, and differently according to each of these cases the difference lies in the target voltage values
- V ble and voltage to be regulated V re g which are involved in the calculation of the new transformation ratio
- the “slow" regulation procedure only authorizes the passage from one transformation report to another consecutive one and at the end of a time delay equal to ntemp seconds (ntemp integer)
- ntemp seconds ntemp integer
- V ble then equals the setpoint voltage and the voltage to be regulated V re g equals the output voltage Consequently, the difference observed between the output voltage Vs and the setpoint voltage (which may be the nominal network voltage) will be reduced by an increase or a decrease in the transformation ratio immediately higher or immediately lower, which corresponds, in the example considered, to a modification of approximately 2% of the output voltage
- the predicted value does not exceed the predetermined threshold, that is to say that the output voltage does not seem to deviate significantly from the nominal voltage in the determined future, and taking into account nor does it seem to deviate from its nominal voltage in the near future
- the difference observed between the output voltage V s and the nominal voltage or the setpoint voltage will be reduced by an increase or a decrease in the transformation ratio immediately higher or immediately lower, which corresponds, in the example considered , at a modification of approximately 2% of the output voltage
- the time delay is in this mode, for example, of 18 s, that is to say that this ratio is maintained for at least 18 s Transformation
- the "fast" regulation mode is called, in a first case when the output voltage is less than Vmf If the reliability index that one has of the predicted voltage value V pr ed is good, the target value V C ⁇ ble to calculate new transformation ratio will be worth the reference voltage Vc (close to the rated voltage generally), and otherwise, V ⁇ ble worth a value between Vc and Vmf the concept of reliability index will described during the complete description of the regulation flowchart In a second case, it is called when Vpred is less than Vmm If the reliability index is good, V C ⁇ bie will be worth Vc, and the voltage to be regulated Vreg will be worth the voltage of output Vs In the case where the reliability is insufficient, no action is triggered. We understand that this test allows to anticipate a decrease in Vs below Vmf, but the regulation is then triggered only if this prediction is reliable
- the "fast” regulation is called when the variation of output voltage is greater than V v .
- no action is triggered if the reliability is insufficient.
- the “slow” regulation procedure is chosen in the other cases, that is to say when the output voltage Vs is less than Vmax and on the triple condition that V e ff is greater than Vmf, that V pre d is greater than V m ⁇ n and that V is less than Vv
- the transformation ratio is applied according to 470 to be applied in order to return as quickly as possible to the target value V ⁇ ble.
- This flowchart includes a test step corresponding to a conditional choice of regulation as a function of the reliability index of the predicted voltage value Vpred already mentioned in the description.
- This reliability index makes it possible to know whether the prediction that has been made of the voltage value in a determined future is good or bad
- this reliability index is measured by the calculation of the variance associated with the calculation of the predicted value Just as for the calculation of the predicted voltage, in general, we calculate at time t, as a function of the values of the voltage at times t t t - aT and t - 2aT, a
- Var (t) 0.8975 V 2 (t) - 1, 795 2 V (t - 10ms) + 0.8975, V 2 (t - 20ms) larger the variance is low and the prediction value of the voltage is good Consequently, a threshold is determined above which it is estimated that the value of the predicted voltage Vpred is bad, and this is this threshold variance value which conditions, in certain cases, such or such regulation
- the regulation process is controlled by a programmable automaton which, in accordance with the flow diagram of FIG. 4, first orders, according to the first test 582, to compare the value of the output voltage Vs with the maximum voltage V max
- the anti-overvoltage mode 583 is triggered Nevertheless, there is a case where the anti-overvoltage resistance will not be connected when Vs> Vmax is the one where the overvoltage is caused by an imbalance in the network This case is detected by the fact that there is an overvoltage even though the transformation ratio kk 'is lower than the upper limit provided by the standard, ie 6% in the case of rural areas in France
- the processor of the automaton performs a second test 584 comparing the value of the output voltage with the value V ) n f equivalent, for example, to 207 V (c i.e. - 10% of nominal value 230 V) If the output voltage is less than V f, the processor performs a third test 585 on the variance, and if it is less than the threshold it initiates the mode of regulation "fast" 586, with a value equal to V ⁇ ble Vc set, otherwise it triggers the control mode "fast" 587 with a target value V ble between V m and V m
- a fifth test 589 on the variance is carried out, and if it is less than the threshold, the "fast" regulation mode 590 is triggered otherwise no new regulation mode is triggered If the predicted voltage is greater than Vmm.
- a sixth test 591 compares the speed of variation of the voltage over the last n periods
- test 595 is carried out, if its result is negative, the end of the time delay is expected and if its result is positive the "slow" regulation mode 593 is triggered, if this variation ⁇ V is greater than V v a last test 592 compares the variance associated with the value of the predicted voltage with the threshold value At the end of this comparison, the "fast" regulation mode 594, is triggered if the variance is less than said threshold, with a target value V ble equal to the output voltage n periods earlier and a value to be regulated V re g equal to the output voltage at time t, otherwise no new mode of regulation is not triggered
- the adapter assembly according to the invention further comprises, in the case of a three-phase network, a plurality of means for sum the voltages on each of the phases, said means being physically independent on each of the phases
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
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- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Dc-Dc Converters (AREA)
- Cable Accessories (AREA)
- Emergency Protection Circuit Devices (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Jib Cranes (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Pens And Brushes (AREA)
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- Rectifiers (AREA)
- Measurement Of Current Or Voltage (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60110780T DE60110780D1 (en) | 2000-04-13 | 2001-04-13 | VOLTAGE ADAPTER UNIT |
EP01925651A EP1279084B1 (en) | 2000-04-13 | 2001-04-13 | Voltage adapter assembly |
MXPA02010160A MXPA02010160A (en) | 2000-04-13 | 2001-04-13 | Voltage adapter assembly. |
SI200130378T SI1279084T1 (en) | 2000-04-13 | 2001-04-13 | Voltage adapter assembly |
AT01925651T ATE295564T1 (en) | 2000-04-13 | 2001-04-13 | POWER ADAPTER UNIT |
AU2001252339A AU2001252339A1 (en) | 2000-04-13 | 2001-04-13 | Voltage adapter assembly |
BR0110005-0A BR0110005A (en) | 2000-04-13 | 2001-04-13 | Voltage adapter device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0004750A FR2807883B1 (en) | 2000-04-13 | 2000-04-13 | VOLTAGE ADAPTER ASSEMBLY |
FR00/04750 | 2000-04-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001079953A1 true WO2001079953A1 (en) | 2001-10-25 |
Family
ID=8849219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2001/001153 WO2001079953A1 (en) | 2000-04-13 | 2001-04-13 | Voltage adapter assembly |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP1279084B1 (en) |
AT (1) | ATE295564T1 (en) |
AU (1) | AU2001252339A1 (en) |
BR (1) | BR0110005A (en) |
DE (1) | DE60110780D1 (en) |
ES (1) | ES2242744T3 (en) |
FR (1) | FR2807883B1 (en) |
MA (1) | MA25789A1 (en) |
MX (1) | MXPA02010160A (en) |
PT (1) | PT1279084E (en) |
WO (1) | WO2001079953A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103064454B (en) * | 2011-10-24 | 2016-01-20 | 上海美迪馨电子科技有限公司 | A kind of single-phase precision alternating-current voltage stabilizer |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB544312A (en) * | 1939-10-30 | 1942-04-08 | British Thomson Houston Co Ltd | Improvements in transformer voltage regulating systems |
GB2307567A (en) * | 1994-10-27 | 1997-05-28 | Seec Densetsu Kk | Load tap changing AC voltage regulator |
US5712554A (en) * | 1995-12-22 | 1998-01-27 | Thomas E. Dorn | Voltage compensation device |
US5808454A (en) * | 1997-02-28 | 1998-09-15 | Chung; Young Choon | Alternating current power control device |
-
2000
- 2000-04-13 FR FR0004750A patent/FR2807883B1/en not_active Expired - Fee Related
-
2001
- 2001-04-13 DE DE60110780T patent/DE60110780D1/en not_active Expired - Lifetime
- 2001-04-13 AT AT01925651T patent/ATE295564T1/en not_active IP Right Cessation
- 2001-04-13 PT PT01925651T patent/PT1279084E/en unknown
- 2001-04-13 EP EP01925651A patent/EP1279084B1/en not_active Expired - Lifetime
- 2001-04-13 WO PCT/FR2001/001153 patent/WO2001079953A1/en active IP Right Grant
- 2001-04-13 BR BR0110005-0A patent/BR0110005A/en not_active IP Right Cessation
- 2001-04-13 MX MXPA02010160A patent/MXPA02010160A/en active IP Right Grant
- 2001-04-13 AU AU2001252339A patent/AU2001252339A1/en not_active Abandoned
- 2001-04-13 ES ES01925651T patent/ES2242744T3/en not_active Expired - Lifetime
-
2002
- 2002-10-08 MA MA26855A patent/MA25789A1/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB544312A (en) * | 1939-10-30 | 1942-04-08 | British Thomson Houston Co Ltd | Improvements in transformer voltage regulating systems |
GB2307567A (en) * | 1994-10-27 | 1997-05-28 | Seec Densetsu Kk | Load tap changing AC voltage regulator |
US5712554A (en) * | 1995-12-22 | 1998-01-27 | Thomas E. Dorn | Voltage compensation device |
US5808454A (en) * | 1997-02-28 | 1998-09-15 | Chung; Young Choon | Alternating current power control device |
Also Published As
Publication number | Publication date |
---|---|
MA25789A1 (en) | 2003-07-01 |
PT1279084E (en) | 2005-09-30 |
MXPA02010160A (en) | 2005-06-06 |
DE60110780D1 (en) | 2005-06-16 |
ES2242744T3 (en) | 2005-11-16 |
AU2001252339A1 (en) | 2001-10-30 |
EP1279084A1 (en) | 2003-01-29 |
BR0110005A (en) | 2003-02-11 |
EP1279084B1 (en) | 2005-05-11 |
ATE295564T1 (en) | 2005-05-15 |
FR2807883B1 (en) | 2002-07-12 |
FR2807883A1 (en) | 2001-10-19 |
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