CN111029120A - On-load capacity and voltage regulating switch and system applied to dry-type transformer - Google Patents
On-load capacity and voltage regulating switch and system applied to dry-type transformer Download PDFInfo
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- CN111029120A CN111029120A CN201911379886.4A CN201911379886A CN111029120A CN 111029120 A CN111029120 A CN 111029120A CN 201911379886 A CN201911379886 A CN 201911379886A CN 111029120 A CN111029120 A CN 111029120A
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- 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
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- 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
- H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
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Abstract
The embodiment of the invention relates to an on-load capacity and voltage regulating switch and system applied to a dry-type transformer. The on-load capacity and voltage regulating switch arranged above the dry-type transformer and the oil tank are wrapped on the outer wall surface of the switch shell, so that the dry-type transformer with the on-load capacity and voltage regulating switch is small in size and wide in application range; and the winding and the iron core in the dry-type transformer can not be immersed in the oil tank, so that the volume of the oil tank is reduced, and compared with the existing oil-immersed transformer capable of regulating capacity and voltage, the fire-fighting hidden danger is greatly reduced, so that the safety performance of an on-load capacity-regulating voltage-regulating switch applied to a dry-type transformer is improved.
Description
Technical Field
The invention relates to the technical field of dry-type transformers, in particular to an on-load capacity and voltage regulating switch and system applied to a dry-type transformer.
Background
The on-load capacity and voltage regulating switch applied to the dry type transformer at present is air-insulated, mainly comprises two types of vacuum bubble switch cabinets and a cylindrical air capacity and voltage regulating switch, and is placed in parallel with the transformer body to meet the requirement of safety distance, so that the dry type transformer is large in size. The space of the outdoor box-type substation is small, and the dry-type transformer with the switch cannot be accommodated in the outdoor box-type substation, so that an on-load capacity regulating and voltage regulating switch capable of being placed in the outdoor box-type substation is needed.
There is the accent of an oily formula distribution transformer usefulness and holds pressure regulating switch in current market, the volume of this switch is less, can satisfy the spatial arrangement requirement of outdoor box-type substation, nevertheless because winding, the whole immersion of iron core that use this switch dry-type transformer are in oil, and the oil tank volume is great, and insulating oil is mostly flammable mineral oil, has the fire control hidden danger, does not allow to settle in the position that fire control requirements such as residential quarter, special industrial area are high.
Therefore, how to make the on-load capacitance-regulating voltage-regulating switch small in size and high in safety becomes an important technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides an on-load capacity and voltage regulating switch and system applied to a dry-type transformer, which are used for solving the technical problems of large volume, small volume, low safety performance and narrow application range of the existing on-load capacity and voltage regulating switch applied to the dry-type transformer.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
an on-load capacity and voltage regulating switch applied to a dry-type transformer is arranged above the dry-type transformer and comprises a switch shell and an oil tank wrapped outside the switch shell, a busbar used for wiring is arranged above the oil tank, a connecting piece used for being connected with a tap is arranged below the oil tank, and the tap is arranged on the dry-type transformer;
wherein, vegetable insulating oil is placed in the oil tank.
Preferably, the material of the oil tank is a steel plate with the thickness larger than 2mm, and the projection area size of the oil tank does not exceed the area size of the dry-type transformer.
Preferably, the switch shell is internally provided with a capacity and voltage regulating switch, and the capacity and voltage regulating switch comprises a vacuum bubble and a switch connected with the vacuum bubble.
Preferably, the dry-type transformer comprises a winding connected to the tap, the winding comprising a high-voltage winding and a low-voltage winding;
the capacity of the dry-type transformer is divided into large capacity and small capacity; when the capacity of the dry-type transformer is the large capacity, the windings of the dry-type transformer are connected by Dyn 11; when the capacity of the dry-type transformer is the small capacity, the winding of the dry-type transformer is wired by Yyn 0.
Preferably, the voltage ratio of the voltage of the delta-connected high voltage winding to the voltage of the star-connected high voltage winding is
Preferably, at least 9 taps are arranged on the dry-type transformer.
The invention also provides an on-load capacity and voltage regulating system applied to the dry-type transformer, which is applied to the on-load capacity and voltage regulating switch applied to the dry-type transformer, and comprises a voltage acquisition module, a state judgment module, an instruction output module and a control unit;
the voltage acquisition module is used for acquiring the voltage of the dry-type transformer through the voltage sensor;
the state judgment module is used for comparing the acquired voltage with a standard voltage value;
the instruction output module is used for sending a control instruction according to the condition that the comparison result of the condition judgment module does not accord with the standard voltage value;
and the control unit is used for controlling the capacitance and voltage regulating switch to regulate the voltage of the dry-type transformer according to the control instruction sent by the instruction output module.
Preferably, the control instruction output by the instruction output module includes a voltage up-regulation instruction, a voltage down-regulation instruction, a voltage regulation stage instruction, a switch-to-large-capacity instruction, a switch-to-small-capacity instruction, and a warning instruction.
Preferably, according to the control instruction sent by the instruction output module, the control unit controls the on-load capacitance and voltage regulating switch to regulate the tap position of the dry-type transformer, so as to change the connection mode of the upper winding of the dry-type transformer and achieve the voltage output by the dry-type transformer to be regulated.
Preferably, the on-load capacity and voltage regulating system applied to the dry-type transformer further comprises a preset regulating module and a warning module;
the preset adjusting module is used for controlling the capacity of the dry-type transformer to be adjusted to be large according to the requirement of the output voltage of the dry-type transformer;
and the warning module is used for sending out an alarm according to the warning instruction output by the instruction output module.
According to the technical scheme, the embodiment of the invention has the following advantages:
1. the on-load capacity and voltage regulating switch applied to the dry-type transformer is wrapped on the outer wall surface of the switch shell through the on-load capacity and voltage regulating switch arranged above the dry-type transformer and the oil tank, so that the dry-type transformer with the on-load capacity and voltage regulating switch is small in size, can be installed in an outdoor box-type substation, and is wide in application range; and because of the oil tank setting is in changing the formula transformer top futilely for winding, iron core among the change formula transformer futilely can not soak in the oil tank, also can reduce the volume of oil tank, consequently the dry-type transformer that has on-load accent holds the tap changer compares with current oil-immersed transformer that can adjust holding the pressure regulating, has greatly reduced the fire control hidden danger, thereby has improved the security performance who is applied to the on-load accent of dry-type transformer holds the tap changer. The technical problems of large volume or small volume, low safety performance and narrow application range of the existing on-load capacity and voltage regulating switch applied to the dry-type transformer are solved;
2. the on-load capacity and voltage regulating system applied to the dry-type transformer adopts the voltage acquisition module, the state judgment module, the instruction output module and the control unit, realizes automatic control of the voltage output by the dry-type transformer, avoids overload output and damages to the dry-type transformer, applies the on-load capacity and voltage regulating system applied to the dry-type transformer with the on-load capacity and voltage regulating switch, and improves the safety performance of the dry-type transformer. The technical problem that the safety performance of the existing on-load capacity and voltage regulation applied to the dry-type transformer is low is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an on-load capacitance and voltage regulating switch applied to a dry-type transformer according to an embodiment of the present invention.
Fig. 2 is a block diagram of an on-load capacitance and voltage regulating system applied to a dry-type transformer according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the application provides an on-load capacity and voltage regulating switch and system applied to a dry-type transformer, and aims to solve the technical problems of large volume, small volume, low safety performance and narrow application range of the existing on-load capacity and voltage regulating switch applied to the dry-type transformer.
The first embodiment is as follows:
fig. 1 is a schematic structural diagram of an on-load capacitance and voltage regulating switch applied to a dry-type transformer according to an embodiment of the present invention.
As shown in fig. 1, an on-load capacitance and voltage regulating switch 20 applied to a dry-type transformer is provided, the on-load capacitance and voltage regulating switch 20 is disposed above a dry-type transformer 10, the on-load capacitance and voltage regulating switch 20 includes a switch housing 21 and an oil tank 22 wrapped outside the switch housing 21, a busbar 23 for wiring is disposed above the oil tank 22, a connecting member 30 for connecting with a tap 11 is disposed below the oil tank 22, and the tap 11 is disposed on the dry-type transformer 10;
wherein, vegetable insulating oil is placed in the oil tank 22.
In the embodiment of the present invention, the busbar 23 is used for connecting with a load through a copper wire harness.
In the embodiment of the present invention, the tap 11 is connected to the tank 22 through the connection member 30.
The connecting member 30 may preferably be a pressing plate made of copper.
In the embodiment of the invention, the vegetable insulating oil has the characteristics of high ignition point and high flash point, the electrical performance of the vegetable insulating oil completely meets or is superior to the common technical standard of mineral oil, and compared with the on-load capacity-regulating voltage-regulating switch of a common oil-immersed distribution transformer, the on-load capacity-regulating voltage-regulating switch 20 adopting the vegetable insulating oil does not need to be changed on the electrical safety distance of a switch in the oil tank 22, so that the electrical safety distance of the on-load capacity-regulating voltage-regulating switch 20 is not greater than that of the on-load capacity-regulating voltage-regulating switch of the common oil-immersed distribution transformer, and the on-load capacity-regulating voltage-regulating switch is safe and reliable.
In the embodiment of the present invention, the oil tank 22 is wrapped on the outer wall surface of the switch housing 21, and the oil tank 22 is disposed above the dry-type transformer 10.
It should be noted that the oil tank 22 solves the problem that the conventional dry-type capacitance and voltage regulating switch is too large in size and cannot be applied to a narrow space such as a box transformer substation. And the oil tank 22 is in an overhead type, the size of the projection area is not more than that of the dry transformer 10, and compared with a laterally-arranged oil-immersed capacitance and voltage regulating switch for distribution transformation, the whole occupied area of the dry transformer 10 is smaller. Because the oil tank 22 sets up the top of doing the transformer 10 makes winding, iron core among the dry type transformer need not soak in the oil tank 22, gradually and reduce the volume of oil tank 22, consequently the dry-type transformer that has on-load capacitance-regulating tap changer 20 compares with the oil-immersed transformer of current adjustable volume pressure regulating, has greatly reduced the fire control hidden danger to improve the security performance who is applied to the on-load capacitance-regulating tap changer of dry-type transformer, make the dry-type transformer that has on-load capacitance-regulating tap changer 20 can be used in outdoor box-type substation, and this outdoor box-type substation can settle in the position that fire control requirements such as residential quarter, special industrial area are high, and the wide range of use that should be applied to the on-load capacitance-regulating tap changer of dry-type transformer has been widened.
The on-load capacity and voltage regulating switch applied to the dry-type transformer is wrapped on the outer wall surface of the switch shell through the on-load capacity and voltage regulating switch arranged above the dry-type transformer and the oil tank, so that the dry-type transformer with the on-load capacity and voltage regulating switch is small in size, can be installed in an outdoor box-type substation, and is wide in application range; and because of the oil tank setting is in changing the formula transformer top futilely for winding, iron core among the change formula transformer futilely can not soak in the oil tank, also can reduce the volume of oil tank, consequently the dry-type transformer that has on-load accent holds the tap changer compares with current oil-immersed transformer that can adjust holding the pressure regulating, has greatly reduced the fire control hidden danger, thereby has improved the security performance who is applied to the on-load accent of dry-type transformer holds the tap changer. The technical problems of large volume or small volume, low safety performance and narrow application range of the existing on-load capacity and voltage regulating switch applied to the dry-type transformer are solved.
In one embodiment of the present invention, the material of the oil tank is selected to be a steel plate with a thickness greater than 2mm, and the projected area size of the oil tank 22 does not exceed the area size of the dry-type transformer 10.
The oil tank 22 is a sealed oil tank made of steel plates by welding, and the protection grade of the oil tank 22 is greater than IP 67. The size of the oil tank 22 is 1330mm 980mm 1141 mm.
In one embodiment of the present invention, a capacitance and voltage regulating switch is installed in the switch housing 21, and the capacitance and voltage regulating switch comprises a vacuum bulb and a switch connected with the vacuum bulb.
It should be noted that the working principle, structure and connection relationship of the structural components of the capacity and voltage regulating switch are the same as or similar to the structure and working principle of a tapping switch of a dry-type on-load capacity regulating and voltage regulating transformer with publication number CN207587513U in the intellectual property office in 2018, 7, 6, and therefore are not described in this embodiment one by one.
In one embodiment of the present invention, the dry-type transformer 10 includes a winding connected to the tap 11, the winding including a high-voltage winding and a low-voltage winding; wherein, the capacity of the dry-type transformer 10 is divided into a large capacity and a small capacity; when the capacity of the dry-type transformer 10 is the large capacity, the windings of the dry-type transformer 10 are connected by Dyn 11; when the capacity of the dry-type transformer 10 is the small capacity, the winding of the dry-type transformer 10 is wired by Yyn 0.
It should be noted that the capacitance and voltage regulating switch is mainly used for regulating the distribution ratio and the capacity of the dry-type transformer 10, and the selection of the capacity of the dry-type transformer 10 is realized by changing the tap position of the dry-type transformer 10. The capacity ratio of the dry-type transformer 10 is 3:1, the dry-type transformer 10 performs capacity switching through the on-load capacity regulating and voltage regulating switch 20, and the capacity of the dry-type transformer 10 is divided into two levels of large capacity and small capacity. Under the two modes of the large capacity and the small capacity, the high-voltage winding is the same as the winding of a common transformer, but the low-voltage winding is divided into three sections. When the capacity of the dry-type transformer 10 is the large capacity, the connection of the dry-type transformer 10 adopts a Dyn11 connection mode, and the equivalent of the low-voltage winding is 100%; when the capacity of the dry-type transformer 10 is small, the connection of the dry-type transformer 10 adopts a Yyn0 connection mode, and the equivalent of the low-voltage winding is 173%.
In one embodiment of the invention, the voltage ratio of the voltage of the delta-connected high-voltage winding to the voltage of the star-connected high-voltage winding is
At least 9 taps are arranged on the dry transformer 10.
It should be noted that the voltage ratio of the voltage of the delta-connected high-voltage winding to the voltage of the star-connected high-voltage winding is
Therefore, the voltage output by the dry-type transformer 10 is basically unchanged under the two modes of the large-capacity mode and the small-capacity mode of the dry-type transformer 10, and the capacity ratio of the dry-type transformer is close to 3: 1.
In one embodiment of the present invention, at least 9 of the taps are disposed on the dry-type transformer 10.
Note that the range of adjustment of the tap 11 is ± 10%.
Example two:
fig. 2 is a block diagram of an on-load capacitance and voltage regulating system applied to a dry-type transformer according to an embodiment of the present invention.
As shown in fig. 2, an embodiment of the present invention provides an on-load capacitance and voltage regulating system applied to a dry-type transformer, which is applied to the above-mentioned on-load capacitance and voltage regulating switch applied to a dry-type transformer, and the on-load capacitance and voltage regulating system applied to a dry-type transformer includes a voltage acquisition module 101, a state judgment module 102, an instruction output module 103, and a control unit 104;
the voltage acquisition module 101 is configured to acquire the voltage of the dry-type transformer 10 through a voltage sensor;
the state judgment module 102 is configured to compare the acquired voltage with a standard voltage value;
the instruction output module 103 is configured to send a control instruction according to a result of the comparison performed by the state determination module 102 that does not meet the standard voltage value;
and the control unit 104 is configured to control the capacitance and voltage regulating switch to regulate the voltage of the dry transformer according to the control instruction sent by the instruction output module 103.
It should be noted that the voltage sensor refers to a sensor that can sense a measured voltage and convert the measured voltage into a usable output signal. The standard voltage value can be 220V, 380V, 6kV, 10kV, 35kV, 110kV, 220kV, 330kV, 500kV, 1000kV and the like. The standard voltage value is determined according to a load connected to the bus bar 23.
In an embodiment of the present invention, the instruction output module 103 is configured to, according to the result of the comparison performed by the state determination module, not conform to the standard voltage value, that is, the voltage is greater than or less than the standard voltage value, and a control instruction needs to be issued to allow the control unit 104 to control the dry-type transformer 10 to adjust the output voltage, so as to avoid that the overload voltage or the voltage lower than the load is provided to the load, so that the load is damaged or the load cannot work normally.
In an embodiment of the present invention, the control instruction output by the instruction output module 103 includes a voltage up adjustment instruction, a voltage down adjustment instruction, a voltage adjustment level instruction, a switch-to-large capacity instruction, a switch-to-small capacity instruction, and a warning instruction.
It should be noted that the instruction output module 103 is further provided with a channel for outputting other instructions, so as to facilitate expansion.
In the embodiment of the present invention, according to the control instruction sent by the instruction output module 103, the control unit 104 controls the on-load capacitance-regulating voltage-regulating switch 20 to regulate the position of the tap 11 of the dry-type transformer 10, and changes the connection mode of the upper winding of the dry-type transformer 10, so as to achieve the purpose of regulating the voltage output by the dry-type transformer 10.
It should be noted that, according to the voltage output by the dry-type transformer 10 and the voltage required by the load, the tap 11 in the dry-type transformer 10 is changed to switch the voltage division ratio and the capacity of the dry-type transformer 10, so as to adjust the voltage output by the dry-type transformer 10 in the case of a power outage.
In the embodiment of the present invention, the on-load capacity and voltage regulating system applied to the dry-type transformer further includes a preset regulating module 105 and an alarm module 106;
the preset adjusting module 105 is configured to, according to a requirement of the required output voltage of the dry-type transformer 10, control the capacity of the dry-type transformer 10 to be adjusted to a large capacity by the control unit 104;
the warning module 106 is configured to send an alarm according to the warning instruction output by the instruction output module 103.
It should be noted that the warning module 106 gives an alarm under the condition that the voltage is abnormal and the warning instruction is acquired, the warning module 106 includes a buzzer and/or a loudspeaker, and the buzzer and/or the loudspeaker give out a sound to give a warning. The case where the dry transformer 10 is abnormal is as follows:
firstly, when the capacity of the dry-type transformer 10 is overloaded under the condition of high capacity, the permanent damage may be caused to the winding of the dry-type transformer 10 when the operation is continued and the overload duration allowed in the operation and maintenance standard of the dry-type transformer 10 is exceeded;
and secondly, when the voltage quality problem which cannot be solved by the on-load capacitance and voltage regulating switch 20 occurs, such as the voltage problem of a transmission and distribution network caused by single-phase earth fault.
In the embodiment of the present invention, the on-load capacity and voltage regulating system applied to the dry-type transformer may be arranged on a remote background terminal device, and a remote control instruction is sent to the dry-type transformer 10 by the remote background on-line monitoring, but the remote control function needs to be locked under the following conditions: firstly, when the on-load capacity and voltage regulating switch 20 regulates the dry transformer 10 to be manual, the state of remote control cannot be carried out, and the state needs to be set to be automatic; secondly, when the voltage quality problem that the on-load capacitance and voltage regulating switch 20 cannot solve, and data display may be caused by single-phase earth fault and transmission and distribution network voltage problems, a regulating instruction cannot be generated by remote control, and damage to the switch is avoided. In addition, the mobile terminal in the remote background can perform adjustment presetting in the preset adjusting module 105 according to the environment where the dry-type transformer 10 is located and the load prediction curve.
The preset adjustment module 105 includes the following preset modes:
firstly, rural residents use electricity to have the condition that the heavy load is easily caused in the heavy holidays, and once the voltage caused by the heavy load is low in the preset holiday period, the capacity of the dry-type transformer 10 is preferentially adjusted to be high capacity instead of adjusting a voltage-adjusting tap, so that the dry-type transformer 10 operates under the economic capacity, the damage to the dry-type transformer 10 is reduced, and the loss is reduced;
secondly, the capacity adjustment period of the dry-type transformer 10 (such as large industrial loads with regular operation) with particularly obvious load rate periodic variation can be preset, the capacity of the dry-type transformer 10 is adjusted to be large in advance, impact on the dry-type transformer 10 caused by instantaneous overload of a large load starting machine under the condition that the dry-type transformer 10 is small in capacity is avoided, and the capacity of the dry-type transformer 10 is adjusted to be small after the load is stably reduced, so that the economic operation of the dry-type transformer 10 is realized.
It should be noted that the design of the preset adjusting module 106 enables a capacity and voltage adjusting and regulating optimal coping strategy for common distribution transformer operating conditions such as heavy overload in major holidays and periodic variation of load rate, and a scheme of adjusting mode presetting can be performed through a remote background mobile terminal according to the environment where the dry-type transformer 10 is located and a load prediction curve, so that the number of switching actions is reduced as much as possible, and the service life of equipment is prolonged. The mobile terminal can be a mobile phone, a computer, an iPad and other monitoring equipment.
The on-load capacity and voltage regulating system applied to the dry-type transformer provided by the invention adopts the voltage acquisition module, the state judgment module, the instruction output module and the control unit, realizes automatic control of the voltage output by the dry-type transformer, avoids overload output and damages to the dry-type transformer, and improves the safety performance of the dry-type transformer by applying the on-load capacity and voltage regulating system applied to the dry-type transformer with the on-load capacity and voltage regulating switch. The technical problem that the safety performance of the existing on-load capacity and voltage regulation applied to the dry-type transformer is low is solved.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An on-load capacity and voltage regulating switch applied to a dry-type transformer is characterized by comprising an on-load capacity and voltage regulating switch arranged above the dry-type transformer, wherein the on-load capacity and voltage regulating switch comprises a switch shell and an oil tank wrapped outside the switch shell;
wherein, vegetable insulating oil is placed in the oil tank.
2. An on-load capacity and voltage regulating switch applied to a dry-type transformer as claimed in claim 1, wherein the material of the oil tank is selected to be a steel plate with a thickness of more than 2mm, and the projected area size of the oil tank does not exceed the area size of the dry-type transformer.
3. An on-load capacity and voltage regulating switch applied to a dry type transformer according to claim 1, wherein a capacity and voltage regulating switch is installed in the switch shell, and the capacity and voltage regulating switch comprises a vacuum bulb and a switch connected with the vacuum bulb.
4. The on-load capacitance and voltage regulating switch applied to a dry type transformer according to claim 1, wherein the dry type transformer comprises a winding, the winding is connected with the tap, and the winding comprises a high-voltage winding and a low-voltage winding;
the capacity of the dry-type transformer is divided into large capacity and small capacity; when the capacity of the dry-type transformer is the large capacity, the windings of the dry-type transformer are connected by Dyn 11; when the capacity of the dry-type transformer is the small capacity, the winding of the dry-type transformer is wired by Yyn 0.
5. The on-load capacity and voltage regulating switch applied to the dry type transformer according to claim 4, whereinCharacterized in that the voltage ratio of the voltage of the delta-connected high-voltage winding to the voltage of the star-connected high-voltage winding is
6. The on-load capacitance and voltage regulating switch applied to the dry type transformer according to claim 1, wherein at least 9 taps are arranged on the dry type transformer.
7. An on-load capacity and voltage regulating system applied to a dry-type transformer is applied to the on-load capacity and voltage regulating switch applied to the dry-type transformer according to any one of claims 1 to 6, and is characterized by comprising a voltage acquisition module, a state judgment module, a command output module and a control unit;
the voltage acquisition module is used for acquiring the voltage of the dry-type transformer through the voltage sensor;
the state judgment module is used for comparing the acquired voltage with a standard voltage value;
the instruction output module is used for sending a control instruction according to the condition that the comparison result of the condition judgment module does not accord with the standard voltage value;
and the control unit is used for controlling the capacitance and voltage regulating switch to regulate the voltage of the dry-type transformer according to the control instruction sent by the instruction output module.
8. The on-load capacity and voltage regulation system applied to the dry-type transformer, according to claim 7, wherein the control commands output by the command output module comprise a voltage up regulation command, a voltage down regulation command, a voltage regulation level command, a switch-to-large capacity command, a switch-to-small capacity command and a warning command.
9. The on-load capacity and voltage regulating system applied to the dry-type transformer according to claim 7, wherein according to the control command sent by the command output module, the control unit controls the on-load capacity and voltage regulating switch to regulate the tap position of the dry-type transformer, so as to change the connection mode of the upper winding of the dry-type transformer and achieve the voltage output by the dry-type transformer.
10. The on-load capacity and voltage regulating system applied to the dry-type transformer according to claim 7, further comprising a preset regulating module and a warning module;
the preset adjusting module is used for controlling the capacity of the dry-type transformer to be adjusted to be large according to the requirement of the output voltage of the dry-type transformer;
and the warning module is used for sending out an alarm according to the warning instruction output by the instruction output module.
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| CN201911379886.4A CN111029120A (en) | 2019-12-27 | 2019-12-27 | On-load capacity and voltage regulating switch and system applied to dry-type transformer |
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| CN201911379886.4A CN111029120A (en) | 2019-12-27 | 2019-12-27 | On-load capacity and voltage regulating switch and system applied to dry-type transformer |
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| CN (1) | CN111029120A (en) |
Citations (7)
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| CN109411217A (en) * | 2018-12-19 | 2019-03-01 | 北京南瑞电研华源电力技术有限公司 | A kind of voltage regulating distribution transformer |
| CN208690049U (en) * | 2018-07-18 | 2019-04-02 | 浙江纪元电气科技股份有限公司 | A kind of permanent magnetism on-load tap changer equipment of transformer |
| CN109637793A (en) * | 2016-04-20 | 2019-04-16 | 浙江宝威电气有限公司 | Capacitance-adjustable transformer with lightning protection function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2512093Y (en) * | 2001-12-13 | 2002-09-18 | 鞍山电力设备制造厂 | Loaded voltage regulating transformer |
| CN202434322U (en) * | 2011-12-23 | 2012-09-12 | 上海置信电气非晶有限公司 | Structure of on-load voltage regulating transformer |
| CN106330031A (en) * | 2015-06-24 | 2017-01-11 | 湖南德沃普电气股份有限公司 | On-load capacitance regulation and voltage regulation distribution transformer control system |
| CN109637793A (en) * | 2016-04-20 | 2019-04-16 | 浙江宝威电气有限公司 | Capacitance-adjustable transformer with lightning protection function |
| CN208142007U (en) * | 2018-02-06 | 2018-11-23 | 广西南宝特电气制造有限公司 | A kind of automatic loaded capacity regulating voltage regulating vegetable insulating oil transformer of amorphous alloy |
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