CN117219424A - Method for realizing on-load voltage-regulating tapping switch - Google Patents
Method for realizing on-load voltage-regulating tapping switch Download PDFInfo
- Publication number
- CN117219424A CN117219424A CN202311179547.8A CN202311179547A CN117219424A CN 117219424 A CN117219424 A CN 117219424A CN 202311179547 A CN202311179547 A CN 202311179547A CN 117219424 A CN117219424 A CN 117219424A
- Authority
- CN
- China
- Prior art keywords
- voltage
- regulating
- voltage regulating
- windings
- independent
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 88
- 238000004804 winding Methods 0.000 claims abstract description 74
- 230000007704 transition Effects 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims description 17
- 230000008859 change Effects 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007363 regulatory process Effects 0.000 description 1
Landscapes
- Control Of Electrical Variables (AREA)
Abstract
The utility model provides a on-load voltage regulation's tapping switch realization method, belongs to on-load voltage regulation's technical field, and on-load voltage regulation's tapping switch is used for voltage regulator and the transformer of different capacity and voltage class, on-load voltage regulation's tapping switch is three-phase, and each phase includes a plurality of independent voltage regulating windings, two associated vacuum switches (K5 a, K5 b), a plurality of change over switches, a transition resistance (R); the on-load voltage-regulating tapping switch has simple regulating logic, fewer taps and switches, simplifies the number of component parts, and greatly reduces the volume and the cost; the step size of the pressure regulation is optional, and the gear and the precision of the pressure regulation are optional; the voltage regulating winding is connected positively and negatively, and the number of leads is not required to be increased when the voltage regulating gear is increased; the method is applicable to voltage regulators and transformers with various capacities, and has wide application range.
Description
Technical Field
The invention belongs to the technical field of on-load voltage regulation, and particularly relates to a realization method of a tap switch with on-load voltage regulation.
Background
The problem of low voltage exists in the power distribution network in China for a long time, and as the distributed photovoltaic is connected to the load side of the traditional low power distribution network, the power flow distribution is changed, when the capacity of the distributed photovoltaic exceeds the load, the original load side is changed into the power supply side, the power flow is inverted, the node with the original voltage reduced due to the inverted power flow is changed into the node with the voltage increased, and the phenomenon that the voltage is higher than the upper limit occurs when the connected capacity is overlarge. Among the risks faced by high-proportion distributed photovoltaic grid-connection, voltage out-of-limit is the most important factor affecting photovoltaic capacity. Currently, more than 100 tens of thousands of distribution transformers exist in a distribution network in China, most of the transformers are non-excitation voltage regulating transformers, and dynamic regulation of output voltage under the condition of load cannot be realized. In recent years, as on-load voltage regulating switch technology is mature gradually, a small amount of on-load voltage regulating distribution transformers are applied to distribution areas in a distribution network in an demonstration mode, but the distribution areas are new areas, the old stock areas still cannot realize the on-load voltage regulating function, the problem of low voltage existing for a long time cannot be solved dynamically, and a large amount of distributed photovoltaic access low-voltage areas cannot be supported. .
Disclosure of Invention
In order to solve the current situation of on-load voltage regulation of a power distribution network, ensure the quality and safe operation of distribution voltage and further improve the absorption capacity of a low-voltage power distribution network in a lifting distributed photovoltaic mode, the invention provides an on-load voltage regulation tapping switch implementation method.
The technical scheme adopted by the invention for achieving the purpose is as follows:
the on-load voltage-regulating tap changer is used for voltage regulators and transformers with different capacities and voltage levels, and each phase comprises two independent voltage-regulating windings U1 and U2, two associated vacuum switches K5a and K5b, a plurality of switching switches K1, K2, K3 and K4 and a transition resistor R;
the number of the change-over switches is 2 times that of the independent voltage regulating windings;
the turns ratio of the independent voltage regulating windings in sequence is 3, namely when the independent voltage regulating windings are arranged as two independent voltage regulating windings, the turns ratio of the two independent voltage regulating windings is 1:3, and when the independent voltage regulating windings are arranged as three independent voltage regulating windings, the turns ratio of the three independent voltage regulating windings is 1:3:9, a step of performing the process; the number of the independent voltage regulating windings determines the number of voltage regulating stages; the number of independent voltage regulating windings and the specific number of turns jointly determine the voltage regulating range of the device; the transition resistor R is used for limiting current in the voltage regulation transition process;
the realization method of the on-load voltage-regulating tap changer comprises the following steps: connecting the two or three independent voltage regulating windings in series through a plurality of change-over switches, wherein one end of a tap is connected with an input end and the transition resistor, the other end of the tap is connected with a vacuum switch, the two associated vacuum switches are connected in parallel, one end of the tap is connected with the transition resistor (R), and the other end of the tap is connected with an output end; the switching of the two related vacuum switches and the change-over switch is controlled, the access mode of the voltage regulating winding is changed, the number of turns of the equivalent winding of the branch circuit where the tapping switch is positioned is changed, the regulation of the output voltage of the device is realized, and the transition resistor is used for limiting the current in the voltage regulating transition process; the on-load voltage-regulating tapping switch realizes the method that the voltage-regulating step length is optional, and the voltage-regulating gear and the precision are optional; the voltage regulating winding can realize forward and reverse access to the branch circuit, and the voltage regulating stage number can be greatly increased on the premise of the same tap number; the on-load voltage-regulating tap changer is suitable for voltage regulators and transformers with different capacities and voltage classes.
Furthermore, the number of the independent voltage regulating windings and the specific number of turns determine the voltage regulating range of the device, for example, when there are two voltage regulating windings U1 and U2, and the number of turns of the two voltage regulating windings is u1=3%u0 and u2=9%u0, the number of voltage regulating stages is 9, and the voltage regulating range is ±12%u0.
The beneficial effects of the invention are as follows: the on-load voltage-regulating tapping switch has simple regulation logic, fewer taps and switches, simplified number of component parts, greatly reduced volume and cost, and no maintenance in the service cycle, wherein the arcing contact in the voltage-regulating transition process adopts a vacuum tube to isolate the direct contact between transformer oil and electric arc, thereby avoiding the pollution of the transformer oil by automatic voltage regulation; the step size of the pressure regulation is optional, and the gear and the precision of the pressure regulation are optional; the voltage regulating winding is connected positively and negatively, and the number of leads is not required to be increased when the voltage regulating gear is increased; the method is applicable to voltage regulators and transformers with various capacities, and has wide application range.
Drawings
FIG. 1 is a schematic diagram of one phase connection of an on-load tap changer according to the present invention;
FIG. 2 is a schematic diagram of a tap changer of the present invention in connection with one of the on-load tap changers;
fig. 3 is a schematic diagram of a tap changer of the present invention with on-load voltage regulation connected to one of the 10kV line autotransformers;
wherein U1, U2: an independent voltage regulating winding; k5a, K5b: a vacuum switch; k1 K2, K3, K4; r: and a transition resistance.
Description of the embodiments
The invention will now be described in detail with reference to the drawings and examples, which together with the examples serve to illustrate the invention. It will be appreciated by those skilled in the art that the following examples are not intended to limit the scope of the invention, and any equivalent changes or modifications made within the spirit of the invention should be considered as falling within the scope of the invention.
Examples
Referring to fig. 1 and fig. 2, in a method for implementing an on-load tap changer for on-load tap changer, when the on-load tap changer is used for an on-load tap changer, the on-load tap changer is located on a high-voltage side branch of the transformer, and the on-load tap changer is three-phase, and each phase includes an independent voltage-regulating winding U1, U2, a primary base winding U0, two associated vacuum switches K5a, K5b, four switches K1, K2, K3, K4, and a transition resistor R;
the turns ratio of the two independent voltage regulating windings is 3 in turn, the turns can be determined according to the voltage regulating range (U1 = 3% U0, U2 = 9% U0 is taken), the turns of the two voltage regulating windings U1 and U2 are determined according to the voltage regulating range, namely when the two independent voltage regulating windings are arranged, the turns ratio of the two independent voltage regulating windings is 1:3, and when the three independent voltage regulating windings are arranged, the turns ratio of the three independent voltage regulating windings is 1:3:9, a step of performing the process; the number of the independent voltage regulating windings determines the number of voltage regulating stages, 9-stage voltage regulation is realized when two independent voltage regulating windings are arranged, and 27-stage voltage regulation is realized when three independent voltage regulating windings are arranged.
In fig. 2, AX is the high-side input terminal of the transformer, and AX is the low-side output terminal of the transformer; k1, K2, K3 and K4 are change-over switches, and K5 two associated vacuum switches can realize simultaneous switching of the two vacuum switches and change the conduction state; r is a transition resistance for reducing short-circuit current in the switching process; u0 is a primary base winding, U1 and U2 are two voltage regulating windings, the turns ratio of the voltage regulating windings is 1:3, and the turns can be determined according to the voltage regulating range (U1 = 3% U0 and U2 = 9% U0);
for convenience of explanation of the principle and process of the on-load voltage-regulating tap changer for the on-load voltage-regulating transformer implementation method, define contacts of the switches in the circuits A1, B1, C1, A2, B2, C2, A3, B3, C3, A4, B4, and C4, all the switch states shown in fig. 2 are original states (0 states), and the switched states are switch states (1 states), such as: the state 0 of K1 is an A1-C1 path, B1-C1 is broken, the state 1 of K1 is A1-C1 is broken, and B1-C1 is a path; k2, K3, K4 are similar to K1; the 0 state of K5 is C1-A 'path, C4-A' path is open, and the 1 state of K5 is C1-A 'path, C4-A' path is open.
The on-load voltage-regulating tap changer is used for the voltage regulating process of the on-load voltage-regulating transformer and comprises the following steps: setting K5 at 0 state position at the beginning of each voltage regulation, namely, a C1-A 'path and C4-A' circuit breaking; and (3) restoring K5 to 1 state bit at the end of each voltage regulation, namely, opening the circuit of C1-A 'and opening the circuit of C4-A'. For example, the process of adjusting from any gear to output boost 1 gear (boost 3%) is: firstly, K5 is placed in a 0 state, then K2, K3 and K4 are placed in a 0 state, K1 is placed in A1 state (A1-C1 is broken, B1-C1 is opened), finally K5 is restored to A1 state position, voltage regulation is finished, at the moment, a U1 winding is reversely connected in series with a primary winding, the ratio of the equivalent turns of the primary winding to the turns of a basic winding of a transformer is changed into (U0-U1)/U0, and the output voltage of the low-voltage side of the transformer rises by 3% compared with the output voltage of the transformer in a non-voltage regulation state.
The process of adjusting from any gear to output step-down 2 gear (step-down 6%) is: firstly, K5 is placed in a 0 state, then K2 and K3 are placed in a 0 state, K1 and K4 are placed in a1 state, finally K5 is restored to a1 state position, voltage regulation is finished, at the moment, a voltage regulating winding U1 is reversely connected into a primary side in series, U2 is connected into the primary side in a forward direction, the ratio of the equivalent turns of a primary side winding of a transformer to the turns of a base winding is changed into U0+ (U2-U1)/U0, and the output voltage of the low-voltage side of the transformer is reduced by 6% compared with that in a non-voltage regulating state. Thus, all voltage regulation action logic is as follows:
voltage regulating action logic table I
Examples
Referring to fig. 1 and fig. 3, in a method for implementing an on-load voltage-regulating tap changer, when the on-load voltage-regulating tap changer is used for a 10kV line autotransformer, the on-load voltage-regulating tap changer is three-phase, and each phase includes two independent voltage-regulating windings U1 and U2, an excitation winding U0, two associated vacuum switches K5a and K5b, four switches K1, K2, K3 and K4, and a transition resistor R;
the turns ratio of the two independent voltage regulating windings is 1:3, and the turns are determined according to the voltage regulating range (taking u1=3%u0, u2=9%u0);
the on-load voltage-regulating tapping switch is arranged on the high-voltage side of the 10kV line self-coupling voltage regulator.
In fig. 3, AX is an input terminal of the voltage regulator, and a' X is an output terminal of the voltage regulator; k1, K2, K3 and K4 are change-over switches, and K5 two associated vacuum switches can realize simultaneous switching of the two vacuum switches and change the conduction state; r is a transition resistance for reducing short-circuit current in the switching process; u0 is an excitation winding, U1 and U2 are two voltage regulating windings, the turns ratio of the voltage regulating windings is 1:3, and the turns can be determined according to the voltage regulating range (for example, u1=3% U0, u2=9% U0);
all the switch states shown in fig. 3 are the original state (0 state), and the switched states are the switch states (1 state), such as: the state 0 of K1 is an A1-C1 path, B1-C1 is broken, the state 1 of K1 is A1-C1 is broken, and B1-C1 is a path; k2, K3, K4 are similar to K1; the 0 state of K5 is C1-A 'path, C4-A' path is open, and the 1 state of K5 is C1-A 'path, C4-A' path is open.
The tap changer with load voltage regulation is arranged in the voltage regulation process of the 10kV line self-coupling voltage regulator, and the voltage regulation process is as follows: setting K5 at 0 state position at the beginning of each voltage regulation, namely, a C1-A 'path and C4-A' circuit breaking; and (3) restoring K5 to 1 state bit at the end of each voltage regulation, namely, opening the circuit of C1-A 'and opening the circuit of C4-A'. For example, the process of adjusting from any gear to output boost 1 gear (boost 3%) is: firstly, K5 is placed in a 0 state, then K2, K3 and K4 are all placed in a 0 state, K1 is placed in A1 state (A1-C1 is broken, B1-C1 is opened), finally K5 is restored to A1 state position, voltage regulation is finished, at the moment, a U1 winding is reversely connected in series with an excitation winding, the ratio of the equivalent turns of an input side winding and the turns of an output side winding of a voltage regulator is changed into (U0-U1)/U0, and the output voltage of the voltage regulator is increased by 3% compared with that in a non-voltage regulation state.
The process of adjusting from any gear to output step-down 2 gear (step-down 6%) is: firstly, K5 is placed in a 0 state, then K2 and K3 are placed in a 0 state, K1 and K4 are placed in a1 state, finally K5 is restored to a1 state position, voltage regulation is finished, at the moment, a voltage regulating winding U1 is reversely connected into an input side in series, U2 is connected into the input side in a forward direction in series, the winding equivalent turns ratio of the input side winding and the output side winding of the voltage regulator is changed into U0+ (U2-U1)/U0, and the output voltage of the voltage regulator is reduced by 6% compared with that of the voltage regulator in a non-voltage regulating state. Thus, all voltage regulation action logic is as follows:
voltage regulating action logic table II
The on-load voltage-regulating tapping switch has simple regulating logic, fewer taps and switches, simplified number of component parts, greatly reduced volume and cost, selectable voltage-regulating step length, and selectable voltage-regulating gear and precision; the voltage regulating winding is connected positively and negatively, and the number of leads is not required to be increased when the voltage regulating gear is increased; the method is applicable to voltage regulators and transformers with various capacities, and has wide application range.
The foregoing embodiments are only illustrative of the present invention, and the structure, size, shape, location and shape of each component may be changed, and on the basis of the technical solution of the present invention, modifications and equivalent changes to the individual components according to the principles of the present invention should not be excluded from the protection scope of the present invention.
Claims (2)
1. The method for realizing the on-load voltage-regulating tap changer is characterized in that the on-load voltage-regulating tap changer is used for voltage regulators and transformers with different capacities and voltage grades, the on-load voltage-regulating tap changer is three-phase, and each phase comprises two independent voltage-regulating windings U1 and U2, two associated vacuum switches K5a and K5b, a plurality of change-over switches K1, K2, K3 and K4 and a transition resistor R;
the number of the change-over switches is 2 times that of the independent voltage regulating windings;
the turns ratio of the two independent voltage regulating windings in turn is 3, namely when the two independent voltage regulating windings are arranged, the turns ratio of the two independent voltage regulating windings is 1:3, and when the three independent voltage regulating windings are arranged, the turns ratio of the three independent voltage regulating windings is 1:3:9, a step of performing the process; the number of the independent voltage regulating windings determines the number of voltage regulating stages; the number of independent voltage regulating windings and the specific number of turns jointly determine the voltage regulating range of the device; the transition resistor R is used for limiting current in the voltage regulation transition process;
the realization method of the on-load voltage-regulating tap changer comprises the following steps: connecting the two or three independent voltage regulating windings in series through a plurality of change-over switches, wherein one end of a tap is connected with an input end and the transition resistor, the other end of the tap is connected with a vacuum switch, the two associated vacuum switches are connected in parallel, one end of the tap is connected with the transition resistor R, and the other end of the tap is connected with an output end; the switching of the two associated vacuum switches and the change-over switch is controlled, the access mode of the voltage regulating winding is changed, the number of turns of an equivalent winding of a branch where the tapping switch is positioned is changed, the output voltage of the device is regulated, the transition resistance is used for limiting current in the voltage regulating transition process, the on-load voltage regulating tapping switch realizes the voltage regulating step size of a method, and the voltage regulating gear and the precision are selectable; the voltage regulating winding can realize forward and reverse access to the branch circuit, and the voltage regulating stage number can be greatly increased on the premise of the same tap number; the on-load voltage-regulating tap changer is suitable for voltage regulators and transformers with different capacities and voltage classes.
2. The on-load tap changer of claim 1, wherein: the number of the independent voltage regulating windings and the specific number of turns jointly determine the voltage regulating range of the device, for example, when two voltage regulating windings U1 and U2 exist, the number of turns of the two voltage regulating windings is U1 = 3% U0 and U2 = 9% U0 respectively, the number of voltage regulating stages is 9, and the voltage regulating range is +/-12% U0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311179547.8A CN117219424A (en) | 2023-09-13 | 2023-09-13 | Method for realizing on-load voltage-regulating tapping switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311179547.8A CN117219424A (en) | 2023-09-13 | 2023-09-13 | Method for realizing on-load voltage-regulating tapping switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117219424A true CN117219424A (en) | 2023-12-12 |
Family
ID=89041989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311179547.8A Pending CN117219424A (en) | 2023-09-13 | 2023-09-13 | Method for realizing on-load voltage-regulating tapping switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117219424A (en) |
-
2023
- 2023-09-13 CN CN202311179547.8A patent/CN117219424A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100498633C (en) | Device for regulating electrical voltage | |
| CN112908652B (en) | On-load tap-changer and control method thereof | |
| Zhou et al. | A review on voltage control using on-load voltage transformer for the power grid | |
| CN105336481A (en) | 36-level high-precision capacitance and voltage adjusting transformer for distributing line | |
| CN107946053B (en) | Tapping switch of dry-type on-load capacity-regulating voltage-regulating transformer | |
| CN221783062U (en) | Tap switch with load voltage regulation | |
| CN112216494A (en) | On-load tap-changer and operation control method thereof | |
| CN113077978A (en) | Novel voltage-regulating phase-shifting transformer with high-capacity double-device height impedance and additional reactor | |
| CN111404172B (en) | Mixed type dynamic reactive power compensation system and method based on high-impedance transformer | |
| CN117219424A (en) | Method for realizing on-load voltage-regulating tapping switch | |
| CN210469151U (en) | Interleaved parallel seven-gear transformer on-load voltage regulation circuit with polarity conversion | |
| CN2625948Y (en) | Noncontact compensating power stabilizer | |
| CN207587513U (en) | A kind of dry type loaded capacity regulating voltage regulating sub-connecting switch of transformer | |
| CN114441950A (en) | Circuit system for on-load tap-changer electrical switching test | |
| CN220964334U (en) | On-load voltage regulating device of stock distribution transformer | |
| CN102074960A (en) | Thyristor valve control type controllable shunt reactor device adopting valve series type configuration | |
| CN205122371U (en) | 36 level high accuracy distribution lines transfers and holds powerstat | |
| CN115346780A (en) | Transformer on-load tap changer capable of striding gear adjustment | |
| CN206331885U (en) | One kind is without arc loaded automatic voltage-regulating distribution transformer device | |
| CN211790774U (en) | Mixed type dynamic reactive power compensation system based on high-impedance transformer | |
| CN117335434A (en) | On-load voltage regulation method for stock distribution transformer | |
| CN215911906U (en) | 10kV line voltage regulator | |
| CN112382484A (en) | Power supply transformer capable of dynamically adjusting capacitance compensation capacity | |
| CN203103962U (en) | Voltage reactive integrated compensator | |
| CN110164726A (en) | A kind of voltage regulating distribution transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |