CN209767241U - Remote automatic monitoring and adjusting device for transformer - Google Patents
Remote automatic monitoring and adjusting device for transformer Download PDFInfo
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- CN209767241U CN209767241U CN201920953209.8U CN201920953209U CN209767241U CN 209767241 U CN209767241 U CN 209767241U CN 201920953209 U CN201920953209 U CN 201920953209U CN 209767241 U CN209767241 U CN 209767241U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 37
- 238000005259 measurement Methods 0.000 claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims abstract description 23
- 238000004891 communication Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 claims 4
- 238000001816 cooling Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 5
- 238000005070 sampling Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
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- 239000013307 optical fiber Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
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- 230000004075 alteration Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The utility model discloses a long-range automatic monitoring adjusting device of transformer, including observing and controlling the module, with V/I that the module of observing and controlling is connected measures and adopts module and switch module, V/I measures and adopts voltage, the circuit parameter of module connection collection each phase circuit, observe and control the module through a trigger circuit and each switch module connects, a switch module one end output connection control power capacitor, switch module's input is parallelly connected each phase circuit and zero line respectively. When the potential danger of three-phase unbalance is detected, the upper computer sends an instruction to the remote automatic monitoring and adjusting device, the measurement and control module controls the trigger circuit according to the instruction, and the trigger circuit controls the input or the cut-off between the power capacitor and the three-phase line and the zero line through the switch module, so that the automatic balance of the three-phase load is realized.
Description
Technical Field
The utility model relates to a power grid equipment monitors technical field, in particular to transformer remote automatic monitoring adjusting device.
Background
In the daily operation management of power distribution networks, both line loss and power quality are one of the most concerned problems for the power sector and consumers today. In production and domestic power consumption, a large number of single-phase, asymmetric, nonlinear and impact loads exist, so that three phases of a power distribution system are unbalanced, the performances and service lives of equipment and facilities such as a distribution transformer and a transformer area line are seriously affected, and even the transformer is burnt. And unbalanced three phase adjusting device can effectively reduce the trouble harm that distribution system unbalanced three phase brought to improve the realization of joining in marriage net operating stability and intelligent control.
In order to reduce frequency and voltage deviation, power grid dispatching automation, reactive power optimization, load control and development and application of a plurality of novel frequency modulation and voltage regulation devices are required. In the aspects of suppressing harmonic waves, reducing voltage fluctuation and flicker, and solving three-phase imbalance, the power grid compensation technology and the filtering device with quite mature technology are basically adopted at present, and comprise a static reactive power compensation device, a static reactive power generation device, an active filtering device and the like. The improvement of the power quality can be considered from the aspects of reactive compensation and filtering treatment. The lack of reactive power may cause the system voltage to drop, causing a series of problems; harmonic pollution can disrupt the operation of the communication system and pose a threat to the life of the electrical equipment and the operation of the power system.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a transformer remote automatic monitoring adjusting device, can switch the condenser of compensation to corresponding looks by oneself when detecting the unbalanced three phase hidden danger existence to realize the automatic balance of three-phase load.
In order to solve the technical problem, the technical scheme of the utility model as follows:
The utility model provides a transformer remote automatic monitoring adjusting device, including observe and control the module, with V/I that the module of observing and controlling is connected measures and adopts module and switch module, V/I measures and adopts voltage, the circuit parameter of module connection collection each looks circuit, observe and control the module through a trigger circuit and each switch module connects, a switch module one end output connection control power capacitor, each looks circuit and zero line are parallelly connected respectively to switch module's input.
Furthermore, the measurement and control module is a single chip microcomputer with an analog-to-digital conversion unit, and the V/I measurement adopts a module to connect and collect the voltage of each phase line and input circuit parameters into the analog-to-digital conversion unit.
Further, the transformer remote automatic monitoring and adjusting device further comprises an internet of things submodule, the internet of things submodule is connected with the measurement and control module, and the internet of things submodule is connected with an upper computer in a wired or wireless mode.
Further, the sub-module of the internet of things is any one or more of a WiFi communication module, a GPRS communication module and a ZigBee communication module.
Furthermore, a rectification filter circuit and a zero-crossing detection circuit are connected to the measurement and control module and are connected with the three-phase voltage input circuit.
Furthermore, the transformer remote automatic monitoring and adjusting device further comprises a cooling fan and a cooling temperature sensor, wherein the cooling fan and the cooling temperature sensor are connected with the measurement and control module.
Furthermore, the transformer remote automatic monitoring and adjusting device further comprises a working condition alarm circuit, wherein the working condition alarm circuit is connected with the measurement and control module and used for sending sound and light alarm information or reporting the working condition alarm information to an upper computer.
Furthermore, the remote automatic monitoring and adjusting device for the transformer is further provided with an extended protection function circuit, wherein the extended protection function circuit at least comprises an undervoltage protection circuit, a harmonic protection circuit and an overvoltage protection circuit.
Optionally, the switch module is a magnetic latching relay.
Optionally, the measurement and control module can perform very comprehensive data detection, including three-phase voltage, three-phase current, three-phase power factor, three-phase active power, three-phase reactive power, three-phase voltage harmonic distortion rate, three-phase current harmonic distortion rate, connection modes of capacitors, and the like.
By adopting the technical scheme, the remote automatic monitoring and adjusting device is arranged at the outlet of the transformer, and basic data such as three-phase voltage, current and the like of equipment of the remote automatic monitoring and adjusting device are acquired; the detected signals are transmitted to the remote automatic monitoring and adjusting device through carrier waves or radio frequency, data are transmitted to a background of the upper computer through a GPRS network or optical fibers by the remote automatic monitoring and adjusting device for analysis, when the potential danger of three-phase imbalance is detected, the upper computer sends instructions to the remote automatic monitoring and adjusting device, the measurement and control module controls the trigger circuit according to the instructions, and the trigger circuit controls the input or the cut-off among the power capacitor, the three-phase line and the zero line through the switch module, so that the automatic balance of three-phase loads is realized.
drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 inventive exercise.
FIG. 1 is a block diagram of the structure of the remote automatic monitoring and adjusting device of the present invention;
FIG. 2 is a schematic circuit diagram of the connection relationship of the remote automatic monitoring and adjusting device of the present invention;
Fig. 3 is a schematic circuit diagram of the power capacitor of the present invention, which is an active compensation device.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
As shown in fig. 1 and 2, the embodiment of the utility model provides a long-range automatic monitoring adjusting device of transformer, including observing and controlling the module, with V/I that the module of observing and controlling is connected measures and adopts module and switch module, V/I measures and adopts voltage, the circuit parameter of module connection collection each looks circuit, observe and control the module through a trigger circuit and each switch module connects, a switch module one end output connection control power capacitor, each looks circuit and zero line of parallelly connected respectively of switch module's input.
Description of the technical principle:
Basic principle 1: and a resistor is connected between the phase lines in a cross mode, and the reactive power transfer capability between the phase lines is realized.
Basic principle 2: and a capacitor or an inductor is connected between the phase lines in a cross mode, so that the capacity of transferring active power between the phase lines is realized.
The method of properly connecting a plurality of power capacitors between each phase and each phase in a three-phase four-wire power distribution system and between each phase and a zero line skillfully utilizes the inductance in a load loop, thereby not only well compensating the power factor of each phase, but also balancing the active current of each phase. Since the capacitance of the capacitor in an actual compensator is fixed, it is impossible to arrange the capacitance of the capacitor at will as in a theoretical calculation process, so that the research of a computer algorithm for achieving a control target is more practical than the theoretical research. The computer algorithm used in practice takes several steps:
(1) and the unbalanced active current is preferentially adjusted on the premise of no overcompensation.
(2) The unbalance degree can be properly adjusted excessively on the premise of improving the unbalance degree.
For example: the active current of phase A100A and the active current of phase B90A before adjustment, and the active current of phase A94A and the active current of phase B96A after adjustment. The phase A current is larger than the phase B before adjustment, and the phase A current is smaller than the phase B after adjustment, so that the phase A current is over-adjusted. However, the unbalance after adjustment is obviously improved, so that the unbalance is effectively adjusted excessively.
(3) In the case of a high system original power factor, i.e., a low system inductance, if the three phases cannot be adjusted to balance, the phase most deviated from the balance value is preferentially adjusted.
(4) And after the calculation for adjusting the unbalanced active current is completed, calculating a required reactive compensation mode.
The measurement and control module is a single chip microcomputer with an analog-to-digital conversion unit, and the V/I measurement adopts a module to connect and collect the voltage of each phase line and input circuit parameters into the analog-to-digital conversion unit. The single chip microcomputer can be a 32-bit ARM high-performance single chip microcomputer for calculation and control, and accurate parameter detection results and precise control effects are obtained while complexity of the controller in the single chip microcomputer is simplified to the maximum extent. The analog quantity to be detected is directly input into the A/D converter of the singlechip for sampling after voltage division, thereby avoiding the error caused by inputting into a processing circuit. The sampling rate per input channel is up to 2 ten thousand times per second, and the total sampling rate of 6 input channels (3 voltage channels, 3 current channels) is up to 12 ten thousand times per second. The high-speed sampling and the well-designed control software fully meet the requirement of precision measurement, not only can detect harmonic voltage and harmonic current, but also can ensure the measurement precision under the condition of serious harmonic interference. The voltage detection resolution can reach 0.1V, the current detection resolution can reach 0.1A, and the power factor detection resolution can reach 0.01.
the transformer remote automatic monitoring and adjusting device further comprises an internet of things submodule, the internet of things submodule is connected with the measurement and control module, and the internet of things submodule is connected with an upper computer in a wired or wireless mode.
Specifically, the sub-module of the internet of things is any one or more of a WiFi communication module, a GPRS communication module, and a ZigBee communication module.
The measurement and control module is further connected with a rectification filter circuit and a zero-crossing detection circuit, and the rectification filter circuit and the zero-crossing detection circuit are connected with a three-phase voltage input circuit.
The transformer remote automatic monitoring and adjusting device further comprises a cooling fan and a cooling temperature sensor, wherein the cooling fan and the cooling temperature sensor are connected with the measurement and control module.
The transformer remote automatic monitoring and adjusting device further comprises a working condition alarm circuit, and the working condition alarm circuit is connected with the measurement and control module and used for sending sound and light alarm information or reporting the working condition alarm information to an upper computer.
The remote automatic monitoring and adjusting device for the transformer is further provided with an extended protection function circuit, wherein the extended protection function circuit at least comprises an undervoltage protection circuit, a harmonic protection circuit and an overvoltage protection circuit.
Overvoltage protection: when the supply voltage is higher than the overvoltage set value, all the capacitor banks which are put into use are cut off.
Undervoltage protection: and when the power supply voltage is lower than the undervoltage set value, all the switched capacitor banks are switched off.
Harmonic protection: and when the harmonic content of the power supply voltage is higher than a set value, all the input capacitor banks are cut off.
Optionally, the switch module is a magnetic latching relay. In order to realize the connection between 'phase and phase' and 'phase and zero' of each capacitor, a magnetic latching relay is adopted to control the switching and connection modes of the capacitors, so that the self-electricity consumption of the compensator is reduced to be minimum, and the operation noise is reduced to be minimum. The synchronous switching technology of the magnetic latching relay is used for realizing the voltage zero-crossing switching-in and current zero-crossing switching-off of the capacitor in any marshalling state.
Optionally, the measurement and control module can perform very comprehensive data detection, including three-phase voltage, three-phase current, three-phase power factor, three-phase active power, three-phase reactive power, three-phase voltage harmonic distortion rate, three-phase current harmonic distortion rate, connection modes of capacitors, and the like.
The compensation of the power capacitor is real-time compensation, the response time is less than 15 milliseconds, the device is an active compensation device, a modern electronic device IGBT is adopted to form a current source type device (as shown in figure 3), the resonance phenomenon caused by the traditional capacitor device is avoided from the mechanism, and the power capacitor is more stable and safer. Harmonic waves are not generated, secondary power grid pollution is not caused, bidirectional split-phase voltage compensation is not performed, and voltage quality is improved.
By adopting the technical scheme, the remote automatic monitoring and adjusting device is arranged at the outlet of the transformer, and basic data such as three-phase voltage, current and the like of equipment of the remote automatic monitoring and adjusting device are acquired; the detected signals are transmitted to the remote automatic monitoring and adjusting device through carrier waves or radio frequency, data are transmitted to a background of the upper computer through a GPRS network or optical fibers by the remote automatic monitoring and adjusting device for analysis, when the potential danger of three-phase imbalance is detected, the upper computer sends instructions to the remote automatic monitoring and adjusting device, the measurement and control module controls the trigger circuit according to the instructions, and the trigger circuit controls the input or the cut-off among the power capacitor, the three-phase line and the zero line through the switch module, so that the automatic balance of three-phase loads is realized.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "row", etc. indicate the orientation or positional relationship indicated based on the drawings, and are only for the convenience of describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present patent application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," "secured," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present patent application, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Claims (9)
1. The utility model provides a transformer remote automatic monitoring adjusting device, its characterized in that, including observe and control the module, with the V/I measurement that the module of observing and controlling is connected adopts module and switch module, V/I measurement adopts voltage, the circuit parameter of module connection collection each looks circuit, observe and control the module through a trigger circuit and each switch module connects, a switch module one end output connection control power capacitor, each looks circuit and zero line are parallelly connected respectively to switch module's input.
2. The transformer remote automatic monitoring and adjusting device according to claim 1, wherein the measurement and control module is a single chip with an analog-to-digital conversion unit, and the V/I measurement adopts a module connection to collect voltage of each phase line and input circuit parameters to the analog-to-digital conversion unit.
3. The transformer remote automatic monitoring and adjusting device according to claim 1, further comprising an internet of things submodule, wherein the internet of things submodule is connected with the measurement and control module, and the internet of things submodule is connected with an upper computer in a wired or wireless mode.
4. The transformer remote automatic monitoring and adjusting device according to claim 3, wherein the Internet of things submodule is any one or more of a WiFi communication module, a GPRS communication module and a ZigBee communication module.
5. The transformer remote automatic monitoring and adjusting device according to claim 1, wherein a rectifying filter circuit and a zero-crossing detection circuit are further connected to the measurement and control module, and are connected with a three-phase voltage input line.
6. The device for remotely and automatically monitoring and adjusting the transformer according to claim 1, further comprising a heat dissipation fan and a heat dissipation temperature sensor, wherein the heat dissipation fan and the heat dissipation temperature sensor are connected with the measurement and control module.
7. The device for remotely and automatically monitoring and adjusting the transformer according to claim 1, further comprising a working condition alarm circuit, wherein the working condition alarm circuit is connected with the measurement and control module and is used for sending sound and light alarm information or reporting the working condition alarm information to an upper computer.
8. the transformer remote automatic monitoring and adjusting device according to claim 1, further comprising an extended protection function circuit, wherein the extended protection function circuit at least comprises an under-voltage protection circuit, a harmonic protection circuit and an over-voltage protection circuit.
9. The transformer remote automatic monitoring and adjusting device of claim 1, wherein the switch module is a magnetic latching relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920953209.8U CN209767241U (en) | 2019-06-24 | 2019-06-24 | Remote automatic monitoring and adjusting device for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920953209.8U CN209767241U (en) | 2019-06-24 | 2019-06-24 | Remote automatic monitoring and adjusting device for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209767241U true CN209767241U (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920953209.8U Expired - Fee Related CN209767241U (en) | 2019-06-24 | 2019-06-24 | Remote automatic monitoring and adjusting device for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209767241U (en) |
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2019
- 2019-06-24 CN CN201920953209.8U patent/CN209767241U/en not_active Expired - Fee Related
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Granted publication date: 20191210 |