CN211206602U - Voltage transformer and voltage tracking compensation device thereof - Google Patents
Voltage transformer and voltage tracking compensation device thereof Download PDFInfo
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- CN211206602U CN211206602U CN201921998129.0U CN201921998129U CN211206602U CN 211206602 U CN211206602 U CN 211206602U CN 201921998129 U CN201921998129 U CN 201921998129U CN 211206602 U CN211206602 U CN 211206602U
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Abstract
The utility model provides a voltage transformer and a voltage tracking compensation device thereof, wherein the voltage tracking compensation device comprises a control module and a sampling module and a compensation module which are connected with the control module; the sampling module is connected with the secondary side of the voltage transformer body and used for detecting a voltage signal of the secondary side of the voltage transformer body and sending the voltage signal to the control module; the compensation module comprises a compensation power supply and a voltage conversion unit, wherein the power supply end of the voltage conversion unit is connected with the compensation power supply, and the output end of the voltage conversion unit is connected with the output end of the voltage transformer body; the control module is used for controlling the working state of the compensation module according to the voltage signal collected by the sampling module. The utility model provides a technical scheme controls compensation module when the voltage of voltage transformer body secondary side is unusual, provides the compensation for voltage transformer's output voltage to solve the relatively poor problem of voltage transformer reliability.
Description
Technical Field
The utility model belongs to the technical field of the electric power measurement, concretely relates to voltage transformer and voltage tracking compensation arrangement thereof.
Background
The basic structure of a voltage transformer is similar to that of a transformer, and the voltage transformer also has two windings, one is called a primary winding and the other is called a secondary winding. Both windings are mounted or wound on the core. Insulation is arranged between the two windings and between the windings and the iron core, so that the two windings and between the windings and the iron core are electrically isolated. When the voltage transformer operates, the primary winding is connected in parallel to a line to be tested, and the secondary winding is connected in parallel to an instrument or a relay. Therefore, when measuring the voltage on the high-voltage line, although the primary voltage is high, the secondary voltage is low, and the safety of operators and instruments can be ensured.
At present, the voltage that voltage transformer that the electric power industry operated detected divide into single bus and double bus, the mode of many buses, even if when many buses were operated, also can install voltage transformer decompression alarm device additional, but can not provide follow-up guarantee problem, only provide an alarm information, integrated automation system and consumer all have voltage transformer's monitoring measure, all can react to the host computer on, the host computer reports voltage transformer's voltage anomaly, but can not resume it to factor of safety is also not high.
With the rapid development of the power industry, the amplitude or the angle deviation of the voltage transformer is compensated by the overvoltage transformer compensation equipment on the social level, so that the problem that the amplitude of the voltage transformer is insufficient or the angle deviation is overlarge is solved. According to the development requirements of the local area, electric power companies in various places can provide requirements of various phase angles for compensation of equipment, expand the stable function of the equipment in order to meet the sudden requirements of users on the premise of not increasing extra cost, and can reduce the later maintenance cost of the equipment to the maximum extent, so that the stable switching of the equipment becomes the optimal solution under the current condition.
However, in the prior art, the compensation of the voltage transformer is mainly to compensate for the voltage drop caused by the secondary side loop of the voltage transformer, and the secondary side loop of the voltage transformer cannot be compensated when the secondary side loop is abnormal, so that the problem of poor reliability of the voltage transformer is caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem existing in the background art, the utility model provides a voltage transformer and voltage tracking compensation arrangement thereof.
A voltage transformer comprises a voltage transformer body and a voltage tracking compensation device; the voltage tracking compensation device comprises a control module and a sampling module and a compensation module which are connected with the control module; the sampling module is connected with the secondary side of the voltage transformer body and used for detecting a voltage signal of the secondary side of the voltage transformer body and sending the voltage signal to the control module; the compensation module comprises a compensation power supply and a voltage conversion unit, wherein the power supply end of the voltage conversion unit is connected with the compensation power supply, and the output end of the voltage conversion unit is connected with the output end of the voltage transformer body; the control module is used for controlling the working state of the compensation module according to the voltage signal collected by the sampling module.
Based on the above, the compensation power supply includes a rectifying unit and a high-frequency transformer, an ac side of the rectifying unit is used for connecting to the commercial power, and a dc side of the rectifying unit is connected to a primary side of the high-frequency transformer; the control module is connected with the primary side of the high-frequency transformer; and the secondary side of the high-frequency transformer is connected with the output end of the voltage transformer.
Based on the above, the secondary side of the high-frequency transformer is provided with two induction coils, one of the two induction coils is connected with the control module, and the other induction coil is connected with the output end of the voltage transformer body.
Based on the above, the voltage conversion unit includes a thyristor, the control module is connected to the control electrode of the thyristor, the anode of the thyristor is connected to the primary side of the high-frequency transformer, and the other end of the thyristor is grounded.
A voltage tracking compensation device of a voltage transformer; the system comprises a control module and a sampling module and a compensation module which are connected with the control module; the sampling module is used for connecting the secondary side of the voltage transformer, detecting a voltage signal of the secondary side of the voltage transformer and sending the voltage signal to the control module; the compensation module comprises a compensation power supply and a voltage conversion unit, wherein the power supply end of the voltage conversion unit is connected with the compensation power supply, and the output end of the voltage conversion unit is used for being connected with the output end of a corresponding voltage transformer; the control module is used for controlling the working state of the compensation module according to the voltage signal collected by the sampling module.
Based on the above, the compensation power supply includes a rectifying unit and a high-frequency transformer, an ac side of the rectifying unit is used for connecting to the commercial power, and a dc side of the rectifying unit is connected to a primary side of the high-frequency transformer; the control module is connected with the primary side of the high-frequency transformer; and the secondary side of the high-frequency transformer is used for connecting the output end of the voltage transformer.
Based on the above, the secondary side of the high-frequency transformer is provided with two induction coils, one of the two induction coils is connected with the control module, and the other induction coil is used for connecting the output end of the voltage transformer body.
Based on the above, the voltage conversion unit includes a thyristor, the control module is connected to the control electrode of the thyristor, the anode of the thyristor is connected to the primary side of the high-frequency transformer, and the other end of the thyristor is grounded.
The utility model discloses relative prior art has substantive characteristics and progress, specifically speaking, the utility model provides a technical scheme, control module among voltage transformer's the voltage tracking compensation arrangement acquires the voltage of voltage transformer body secondary side through sampling module, controls compensation module when the voltage of voltage transformer body secondary side is unusual, provides the compensation for voltage transformer's output voltage to solve the relatively poor problem of voltage transformer reliability.
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, 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 creative efforts.
Fig. 1 is a schematic structural diagram of a voltage transformer in an embodiment of the voltage transformer of the present invention;
fig. 2 is a schematic structural diagram of a voltage tracking compensation device in an embodiment of the voltage transformer of the present invention;
fig. 3 is a schematic structural diagram of the compensating power supply in the embodiment of the voltage transformer of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
The embodiment of the voltage transformer comprises:
as shown in fig. 1, the voltage transformer provided by the present embodiment includes a voltage transformer body and a voltage tracking compensation device. The primary side of the voltage transformer body is arranged in a tested line, the secondary side of the voltage transformer body is connected with the output end, the output end is used for connecting an upper computer, the voltage transformer body detects the voltage of the tested line and sends the voltage to the upper computer, and the upper computer acquires the voltage of the tested line through the voltage transformer body.
The structure of the voltage tracking compensation device is shown in fig. 2 and comprises a sampling module, a control module and a compensation module. The sampling module in this embodiment is a sampling voltage transformer, and a primary side of the sampling voltage transformer is disposed on a secondary side of a voltage transformer body, and the secondary side of the sampling voltage transformer is connected to the control module, and is configured to detect a voltage signal on the secondary side of the voltage transformer body and send the voltage signal to the control module. The control module in this embodiment is a single chip microcomputer of 80C52 series, and is connected to the compensation module, and is configured to determine whether a loop on the secondary side of the voltage transformer body is abnormal according to the voltage signal collected by the sampling module, and if the loop on the secondary side of the voltage transformer body is abnormal, control the compensation module to compensate the loop.
The structure of the compensation module in this embodiment is shown in fig. 3, and includes a compensation power supply and a voltage conversion unit, where the compensation power supply includes a rectifier chip U1 with a model number MB 6S. The alternating current side of the rectifying chip U1 is connected with an interface J0, and an interface J0 is used for connecting the commercial power. The negative electrode of the rectifier chip U1 on the direct current side is grounded, the positive electrode is connected with one end of the primary side of the high-frequency transformer T, the other end of the primary side of the high-frequency transformer T is connected with the anode of the thyristor Q1, and the cathode of the thyristor Q1 is grounded. The control module is connected with the control electrode of the thyristor Q1 and controls the working state of the thyristor Q1 through the generated PWM wave. Two groups of coils are arranged on the secondary side of the high-frequency transformer T, a first rectifying circuit is correspondingly arranged on the first coil, and a second rectifying circuit is correspondingly arranged on the second coil. The alternating current side of the first rectifying circuit is connected with the first coil, the direct current side of the first rectifying circuit is connected with the control module, and the control module obtains the output voltage of the high-frequency transformer through the first coil; the alternating current side of the second rectifying circuit is connected with the second coil, and the direct current side of the second rectifying circuit is connected with the output end of the voltage transformer to provide compensation for the output voltage of the secondary side of the voltage transformer body.
In the control module in the embodiment, when the voltage transformer body detects that a phase loss or voltage loss occurs in a voltage system, whether normal power failure maintenance or fault power failure occurs is judged firstly, if the normal power failure occurs, tracking compensation is stopped, and equipment is in a maintenance state; and if the power failure is a fault power failure, starting a tracking compensation measure.
When the voltage transformer body detects that the voltage system is lower than the amplitude or the angle has deviation, judging the amplitude, judging the angle, adjusting the phase of the amplitude according to the change condition of the angle, and adjusting the output when the phase reaches the threshold; and if the fault phase deviation and amplitude change are caused by the secondary equipment fault of the voltage transformer body, tracking, compensating, alarming and prompting maintenance.
The compensation power supply in the embodiment comprises a rectifying unit and a high-frequency transformer, wherein the voltage transformation unit is a thyristor Q1, and the compensation power supply converts commercial power into voltage for providing compensation for the voltage transformer; in other embodiments, the compensation power supply may be a direct current power supply.
In the embodiment, two coils are arranged on the secondary side of the high-frequency transformer, wherein one coil is used for detecting the output voltage of the secondary side of the high-frequency transformer so as to facilitate the control module to control the high-frequency transformer; as another embodiment, a voltage sensor may be used to detect the voltage of the output of the secondary side of the high frequency transformer.
In the embodiment, the control module controls the working state of the high-frequency transformer through the thyristor; in other embodiments, a controllable switch such as a triode, a field effect transistor, or the like may be used to control the operating state of the high frequency transformer.
The voltage tracking compensation device embodiment of the voltage transformer comprises:
the present embodiment provides a voltage tracking compensation apparatus for a voltage transformer, which has been described in detail in the above-mentioned voltage transformer embodiment and will not be described herein much, as the structure of the voltage tracking compensation apparatus for the above-mentioned voltage transformer embodiment is the same.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The utility model provides a voltage transformer, includes voltage transformer body and voltage tracking compensation arrangement, its characterized in that: the voltage tracking compensation device comprises a control module and a sampling module and a compensation module which are connected with the control module; the sampling module is connected with the secondary side of the voltage transformer body and used for detecting a voltage signal of the secondary side of the voltage transformer body and sending the voltage signal to the control module; the compensation module comprises a compensation power supply and a voltage conversion unit, wherein the power supply end of the voltage conversion unit is connected with the compensation power supply, and the output end of the voltage conversion unit is connected with the output end of the voltage transformer body; the control module is used for controlling the working state of the compensation module according to the voltage signal collected by the sampling module.
2. The voltage transformer of claim 1, wherein: the compensation power supply comprises a rectifying unit and a high-frequency transformer, wherein the alternating current side of the rectifying unit is used for being connected with commercial power, and the direct current side of the rectifying unit is connected with the primary side of the high-frequency transformer; the control module is connected with the primary side of the high-frequency transformer; and the secondary side of the high-frequency transformer is connected with the output end of the voltage transformer.
3. The voltage transformer of claim 2, wherein: and the secondary side of the high-frequency transformer is provided with two induction coils, one induction coil is connected with the control module, and the other induction coil is connected with the output end of the voltage transformer body.
4. The voltage transformer of claim 2, wherein: the voltage conversion unit comprises a thyristor, the control module is connected with a control electrode of the thyristor, the anode of the thyristor is connected with the primary side of the high-frequency transformer, and the other end of the thyristor is grounded.
5. The utility model provides a voltage transformer's voltage tracking compensation arrangement which characterized in that: the system comprises a control module and a sampling module and a compensation module which are connected with the control module; the sampling module is used for connecting the secondary side of the voltage transformer, detecting a voltage signal of the secondary side of the voltage transformer and sending the voltage signal to the control module; the compensation module comprises a compensation power supply and a voltage conversion unit, wherein the power supply end of the voltage conversion unit is connected with the compensation power supply, and the output end of the voltage conversion unit is used for being connected with the output end of a corresponding voltage transformer; the control module is used for controlling the working state of the compensation module according to the voltage signal collected by the sampling module.
6. The voltage tracking compensation apparatus of a voltage transformer according to claim 5, wherein: the compensation power supply comprises a rectifying unit and a high-frequency transformer, wherein the alternating current side of the rectifying unit is used for being connected with commercial power, and the direct current side of the rectifying unit is connected with the primary side of the high-frequency transformer; the control module is connected with the primary side of the high-frequency transformer; and the secondary side of the high-frequency transformer is used for connecting the output end of the voltage transformer.
7. The voltage tracking compensation apparatus of a voltage transformer according to claim 6, wherein: and two induction coils are arranged on the secondary side of the high-frequency transformer, one induction coil is connected with the control module, and the other induction coil is used for connecting the output end of the voltage transformer body.
8. The voltage tracking compensation apparatus of a voltage transformer according to claim 6, wherein: the voltage conversion unit comprises a thyristor, the control module is connected with a control electrode of the thyristor, the anode of the thyristor is connected with the primary side of the high-frequency transformer, and the other end of the thyristor is grounded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921998129.0U CN211206602U (en) | 2019-11-19 | 2019-11-19 | Voltage transformer and voltage tracking compensation device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921998129.0U CN211206602U (en) | 2019-11-19 | 2019-11-19 | Voltage transformer and voltage tracking compensation device thereof |
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| CN211206602U true CN211206602U (en) | 2020-08-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113078618A (en) * | 2021-03-08 | 2021-07-06 | 珠海润科电力设备有限公司 | PT blocking method and device based on thyristor |
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2019
- 2019-11-19 CN CN201921998129.0U patent/CN211206602U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113078618A (en) * | 2021-03-08 | 2021-07-06 | 珠海润科电力设备有限公司 | PT blocking method and device based on thyristor |
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