CN114123254A - Multifunctional low-voltage three-phase comprehensive adjusting device - Google Patents
Multifunctional low-voltage three-phase comprehensive adjusting device Download PDFInfo
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- CN114123254A CN114123254A CN202111397677.XA CN202111397677A CN114123254A CN 114123254 A CN114123254 A CN 114123254A CN 202111397677 A CN202111397677 A CN 202111397677A CN 114123254 A CN114123254 A CN 114123254A
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- 238000012545 processing Methods 0.000 claims abstract description 24
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 230000033228 biological regulation Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 230000018199 S phase Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 9
- 230000001105 regulatory effect Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000000819 phase cycle Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000005457 optimization Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides a multifunctional low-voltage three-phase comprehensive adjusting device, and belongs to the technical field of power distribution networks. Including adjusting module, measuring module and data transmission module, wherein adjusting module can control the connection and the disconnection of low pressure wire, the staff of being convenient for carries out the phase modulation and handles, measuring module real-time supervision three-phase unbalanced loading platform district's load current provides the reference for staff's phase modulation, data transmission module then sends the load current information of monitoring in real time to staff department for the staff can in time master the site conditions, in time carries out the phase modulation and handles. The invention monitors the load current of the three-phase load unbalance platform area in real time through the measuring module, thereby providing phase modulation reference for field personnel, and leading the working personnel to conveniently acquire the load current data and carry out phase modulation processing in time.
Description
Technical Field
The invention belongs to the technical field of power distribution networks, and particularly relates to a multifunctional low-voltage three-phase comprehensive adjusting device.
Background
With the development of power systems, the problem of three-phase imbalance of a low-voltage power grid is more and more prominent. The reason is that the power grid supplies power to users in a three-phase four-wire system, the power users are numerous and distributed, and three-phase load distribution imbalance of a transformer area is easily caused in the power distribution network. Unbalanced three phase can influence the power supply quality, brings huge economic loss for electric power system, reduces the power supply reliability, influences the safe, the steady operation of electric wire netting, consequently need through taking technical means, carries out automatically regulated to unbalanced three phase.
At present, the traditional method for solving the three-phase imbalance mainly comprises artificial phase modulation, intelligent phase modulation and an additional imbalance compensation device. For manual phase modulation, the imbalance condition of the three-phase current of the current transformer area needs to be acquired, so that phase modulation operation is carried out on site. For field workers, the phase modulation processing is inconvenient for acquiring the three-phase load current situation in real time, so that the phase modulation processing is troublesome.
Disclosure of Invention
In view of the above, the present invention aims to solve the problem that the phase modulation processing is troublesome due to the fact that field workers are inconvenient to obtain the three-phase load current during the phase modulation processing.
In order to solve the technical problems, the invention provides the following technical scheme:
a multifunctional low-voltage three-phase comprehensive adjusting device comprises an adjusting module, a measuring module and a data sending module;
the adjusting module is used for connecting or disconnecting a low-voltage wire so that a worker can perform phase modulation processing on the three-phase load imbalance of the transformer area;
the measuring module is used for monitoring the load current of the three-phase load unbalance area at the adjusting module in real time;
the data sending module is used for sending the load current data monitored by the measuring module in real time to workers, so that the workers can utilize the adjusting module to perform phase modulation processing on the three-phase load unbalance of the transformer area according to the load current of the three-phase load unbalance transformer area.
Further, the adjusting module is used for connecting or disconnecting the low-voltage wire, so that the phase modulation processing of the three-phase load unbalance of the platform area by the staff specifically comprises:
the method comprises the following steps that a worker obtains load current of a three-phase load unbalance area at an adjusting module when the adjusting module is connected with a low-voltage lead;
the staff utilizes adjusting module disconnection low pressure wire based on the load current in unbalanced three-phase load platform district to the staff carries out the phase modulation to platform district unbalanced three-phase load and handles.
Further, the measuring module measures load current through a three-phase low-voltage current transformer;
the three-phase low-voltage current transformer is used for measuring the load current of the three-phase load unbalance area at the adjusting module in real time.
Further, the device also comprises a power supply module;
the power module is used for providing a working power supply for the multifunctional low-voltage three-phase comprehensive adjusting device.
Further, the power module specifically includes: a battery and a photovoltaic panel;
the storage battery is connected with the data sending module and is used for providing a working power supply for the data sending module;
the photovoltaic panel is connected with the storage battery and is used for converting solar energy into electric energy stored in the storage battery.
Furthermore, the device also comprises a digital display module;
and the digital display module is respectively connected with the storage battery and the measuring module and is used for displaying the load current monitored by the measuring module in real time.
In summary, the invention provides a multifunctional low-voltage three-phase comprehensive adjusting device, which comprises an adjusting module, a measuring module and a data sending module, wherein the adjusting module can control the connection and disconnection of a low-voltage wire, so that a worker can conveniently perform phase modulation processing, the measuring module monitors the load current of a three-phase load unbalance platform area in real time and provides a reference basis for phase modulation of the worker, and the data sending module sends the load current information monitored in real time to the worker, so that the worker can timely master the field situation and perform phase modulation processing in time. The invention monitors the load current of the three-phase load unbalance platform area in real time through the measuring module, thereby providing phase modulation reference for field personnel, and leading the working personnel to conveniently acquire the load current data and carry out phase modulation processing in time.
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 a multifunctional low-voltage three-phase comprehensive regulating device provided by an embodiment of the invention;
fig. 2 is a schematic diagram of a regulating module according to an embodiment of the present invention.
In the drawings: 100-adjusting module, 200-measuring module, 300-data sending module, 400-storage battery, 500-photovoltaic panel and 600-digital display device.
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 apparent 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.
With the development of power systems, the problem of three-phase imbalance of a low-voltage power grid is more and more prominent. The reason is that the power grid supplies power to users in a three-phase four-wire system, the power users are numerous and distributed, and three-phase load distribution imbalance of a transformer area is easily caused in the power distribution network. Unbalanced three phase can influence the power supply quality, brings huge economic loss for electric power system, reduces the power supply reliability, influences the safe, the steady operation of electric wire netting, consequently need through taking technical means, carries out automatically regulated to unbalanced three phase.
At present, the traditional method for solving the three-phase imbalance mainly comprises artificial phase modulation, intelligent phase modulation and an additional imbalance compensation device. For manual phase modulation, the imbalance condition of the three-phase current of the current transformer area needs to be acquired, so that phase modulation operation is carried out on site. For field workers, the phase modulation processing is inconvenient for acquiring the three-phase load current situation in real time, so that the phase modulation processing is troublesome.
Specifically, the artificial phase modulation is a traditional balance optimization method, and is classified when users access the network, so that similar users are uniformly distributed on three phases as much as possible. When three phases are unbalanced, the load phase sequence is adjusted manually after the unbalance degree is calculated manually. The final aim of phase modulation is to optimize the voltage quality (technical level) and reduce the line losses (economic level).
Based on the operating characteristics of manual phase modulation and the problem that real-time load current is inconvenient to obtain during phase modulation processing, the invention provides a multifunctional low-voltage three-phase comprehensive adjusting device.
The following is a detailed description of an embodiment of the multifunctional low-voltage three-phase comprehensive regulating device of the invention.
Referring to fig. 1 and 2, the present embodiment provides a multifunctional low-voltage three-phase comprehensive regulating device, including: an adjustment module 100, a measurement module 200 and a data transmission module 300.
In this embodiment, the adjusting module 100 is used to connect or disconnect low-voltage wires, so that a worker can perform phase adjustment processing on the three-phase load imbalance of the platform area.
It should be noted that, the multifunctional low-voltage three-phase comprehensive adjusting device of the present embodiment is mainly applied to a scene of artificial phase modulation. The manual phase modulation is to manually adjust the phase sequence after calculating the unbalance degree manually when the three phases are unbalanced. The specific operation is that when a single-phase user in the low-voltage three-phase system is switched on, the single-phase user is switched among A, B, C three phases until the single-phase user is switched to accord with the phase sequence. The method requires that a worker disconnects a main switch of the current three-phase unbalanced load area before phase modulation, peels off a refute interface of an overload phase line of the original low-voltage power line during phase modulation, and selects the phase line with lower load to be reconnected.
In order to facilitate the phase modulation process for the workers, as shown in fig. 2, the present embodiment employs a regulating module 100, and the regulating module 100 is used for conveniently connecting or disconnecting the low-voltage wires. Before the phase modulation processing is performed by the staff, the adjusting module is connected with the low-voltage wire by using the socket (i.e. the circle in fig. 2), and when the phase modulation is needed, the adjusting module 100 is operated to disconnect the low-voltage wire and adjust the phase sequence and then reconnect the low-voltage wire, so that the phase modulation processing can be completed. The specific structural design of the conditioning module 100 is not limited herein, and it is sufficient that it can perform a convenient operation of connecting and disconnecting low-voltage wires.
There are two general methods for calculating the degree of unbalance based on the load current. One is (maximum current-minimum current)/maximum current, and the other is MAX (phase current-three-phase average current)/three-phase average current. Both methods require knowledge of the data of the current load current of the current transformer area.
In this embodiment, the measurement module 200 is used to monitor the load current of the three-phase load unbalance area at the regulation module in real time.
It should be noted that, in this embodiment, the measurement module 200 is adopted, and specifically, the measurement module adopts 1 set of three-phase low-voltage Transformers (TA), and utilizes the electromagnetic induction principle, converts the current measured by the low-voltage conductors in proportion through the first and second transformation ratios, and transmits the converted current into the measurement module 200 for reading, metering and monitoring.
Further, the measurement module 200 of the present embodiment is specifically configured to measure the three-phase load current at the regulation module 100. That is, the measurement terminal (e.g., three-phase low-voltage transformer TA) of the measurement module 200 is integrated on the adjustment module 100. The specific arrangement may be determined according to the structure of the conditioning module 100.
The measuring module 200 continuously monitors the load current of the current conductor when the regulating module 100 is connected to the low-voltage conductor, and the data sending module 300 sends the load current to a remote worker to calculate the three-phase unbalance. If the three-phase load of the distribution room is unbalanced at this time, the worker goes to the site to perform phase modulation processing through the adjusting module 100.
In this embodiment, the data sending module 300 is configured to send the load current data monitored in real time by the measuring module 200 to the staff, so that the staff uses the adjusting module 100 to perform phase modulation processing on the three-phase load imbalance of the platform area according to the load current of the three-phase load imbalance platform area.
It should be noted that, a judging module may be further disposed in the data sending module 300, and the judging module automatically calculates the three-phase imbalance degree based on the load current measured by the measuring module 200, and sends the result to the remote staff through the data sending module 300 when the three-phase imbalance degree is greater than the set threshold value, so as to provide a reference basis for the remote staff to perform phase modulation on site.
In addition, the device needs to be provided with a power supply module required by work, and the power supply module is used for providing a working power supply for the multifunctional low-voltage three-phase comprehensive adjusting device. In the present embodiment, the power module may be specifically configured to include a storage battery 400 and a photovoltaic panel 500; the storage battery 400 is connected with the data transmission module 300 and is used for providing working power supply for the data transmission module 300; photovoltaic panel 500 is attached to battery 400 for converting solar energy to electrical energy stored in battery 400.
The power module can provide required continuous electric energy for each functional module through solar power generation and is arranged above the adjusting device. The solar energy is irradiated by sunlight in the daytime, and the surplus current is stored in the storage battery 400 so as to be used at night without light. Considering the power failure factor, the external photovoltaic panel 500 can avoid the problem that the functional module is shut down due to power loss when the power of the line is cut off.
Because the main application function of the multifunctional low-voltage three-phase comprehensive adjusting device of the embodiment is in the scene of artificial phase modulation, the real-time load current of the low-voltage wire can be conveniently acquired when workers perform phase modulation on site. And a digital display module 600 can be additionally arranged, wherein the digital display module 600 is respectively connected with the storage battery 400 and the measuring module 200 and is used for displaying the load current monitored by the measuring module 200 in real time. Specifically, the digital signal transmitted by the measurement module 200 is converted into a display form of an LED display screen.
This embodiment provides a multi-functional low pressure three-phase synthesis adjusting device, including adjusting module, measuring module and data transmission module, wherein adjusting module can control the connection and the disconnection of low pressure wire, the staff of being convenient for carries out the phase modulation and handles, the load current in the unbalanced three-phase load district of measuring module real-time supervision, for staff's phase modulation provides the reference foundation, data transmission module then sends the load current information of monitoring in real time to staff department, make the staff can in time master the site conditions, in time carry out the phase modulation and handle. The invention monitors the load current of the three-phase load unbalance platform area in real time through the measuring module, thereby providing phase modulation reference for field personnel, and leading the working personnel to conveniently acquire the load current data and carry out phase modulation processing in time. The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; 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 (6)
1. The multifunctional low-voltage three-phase comprehensive adjusting device is characterized by comprising an adjusting module, a measuring module and a data sending module;
the adjusting module is used for connecting or disconnecting a low-voltage wire so that a worker can perform phase modulation processing on the three-phase load imbalance of the transformer area;
the measuring module is used for monitoring the load current of the three-phase load unbalance platform area at the adjusting module in real time;
the data sending module is used for sending the load current data monitored by the measuring module in real time to a worker, so that the worker can utilize the adjusting module to perform phase modulation processing on the three-phase load unbalance of the platform area according to the load current of the three-phase load unbalance platform area.
2. The multifunctional low-voltage three-phase comprehensive adjusting device as claimed in claim 1, wherein the adjusting module is used for connecting or disconnecting low-voltage wires, so that a worker can perform phase modulation processing on three-phase load imbalance of a platform area specifically comprises:
a worker obtains the load current of a three-phase load unbalance area at the adjusting module when the adjusting module is connected with a low-voltage lead;
and the staff utilizes the adjusting module to disconnect the low-voltage lead based on the load current of the three-phase load unbalance transformer area, so that the staff can perform phase modulation processing on the three-phase load unbalance of the transformer area.
3. The multifunctional low-voltage three-phase comprehensive regulation device according to claim 1, characterized in that the measuring module measures the load current, in particular through a three-phase low-voltage current transformer;
the three-phase low-voltage current transformer is used for measuring the load current of the three-phase load unbalance area at the adjusting module in real time.
4. The multifunctional low-voltage three-phase comprehensive regulation device according to claim 1, further comprising a power module;
the power module is used for providing a working power supply for the multifunctional low-voltage three-phase comprehensive adjusting device.
5. The multifunctional low-voltage three-phase comprehensive regulation device according to claim 1, wherein the power module specifically comprises: a battery and a photovoltaic panel;
the storage battery is connected with the data sending module and is used for providing a working power supply for the data sending module;
the photovoltaic panel is connected with the storage battery and is used for converting solar energy into electric energy stored in the storage battery.
6. The multifunctional low-voltage three-phase comprehensive regulation device according to claim 5, further comprising a digital display module;
and the digital display module is respectively connected with the storage battery and the measuring module and is used for displaying the load current monitored by the measuring module in real time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111397677.XA CN114123254A (en) | 2021-11-23 | 2021-11-23 | Multifunctional low-voltage three-phase comprehensive adjusting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111397677.XA CN114123254A (en) | 2021-11-23 | 2021-11-23 | Multifunctional low-voltage three-phase comprehensive adjusting device |
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| CN114123254A true CN114123254A (en) | 2022-03-01 |
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- 2021-11-23 CN CN202111397677.XA patent/CN114123254A/en active Pending
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| CN206471834U (en) * | 2016-11-25 | 2017-09-05 | 江苏大航泓城电力电子有限公司 | Distribution transforming three-phase imbalance governing system |
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