CN212784782U - Three-phase unbalanced load automatic regulating apparatus - Google Patents
Three-phase unbalanced load automatic regulating apparatus Download PDFInfo
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- CN212784782U CN212784782U CN202021880788.7U CN202021880788U CN212784782U CN 212784782 U CN212784782 U CN 212784782U CN 202021880788 U CN202021880788 U CN 202021880788U CN 212784782 U CN212784782 U CN 212784782U
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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
Abstract
The utility model discloses an unbalanced three-phase load automatic regulating apparatus belongs to electric power low pressure distribution system technical field. The three-phase load unbalance automatic adjusting device comprises an unbalance management unit and a three-phase load unbalance automatic adjusting terminal, wherein the unbalance management unit consists of a second current transformer and an insulated gate bipolar transistor module, and the second current transformer is connected with the insulated gate bipolar transistor module; and the insulated gate bipolar transistor module is connected with the three-phase load imbalance automatic regulation terminal through a communication line. The utility model discloses whole accommodation process is accomplished by equipment is automatic, need not manual operation, has saved the human cost who consumes because operation tradition compensation equipment greatly.
Description
Technical Field
The utility model relates to an electric power distribution transformer low pressure load distribution technical field, concretely relates to unbalanced three-phase load automatic regulating apparatus.
Background
With the rapid development of social economy and the updating of electric equipment, the structure of loads in a power distribution network is changed greatly. The demand of users for electric energy is gradually increased, and the requirement for the quality of the electric energy is also gradually increased. Three-phase unbalance is one of important indexes of electric energy quality, and the three-phase unbalance mostly occurs in a 10/0.4kV medium and low voltage distribution network. In low voltage distribution networks, distribution transformers often operate in a three-phase unbalanced state due to the non-uniformity of the three-phase load distribution and the randomness of the power usage. The traditional load compensation method is to improve three-phase unbalance while compensating reactive power by putting or withdrawing a capacitor bank or a reactor bank on the unbalanced phase. The method is difficult to accurately and rapidly carry out dynamic tracking and compensation on the unbalanced load, and has limited adjusting range and adjusting precision, so the method is often applied to occasions with slow load change and low compensation performance requirement.
An intelligent control system for three-phase load unbalance of distribution transformer is disclosed in an authorized bulletin number CN108988366A, and comprises an unbalance control controller, a control unit, a data acquisition module, a first communication module, a second communication module, a commutation switch control module and a commutation switch. The data acquisition module is used for monitoring the current of the main road and transmitting data to the control unit; the control unit receives data, performs phase change operation, transmits a phase change operation instruction to the first communication module, and sends a control signal to the unbalance management unit; the first communication module outputs a phase change operation instruction to the phase change switch control module; and after receiving the instruction, the phase change switch control module controls the phase change switch to act to complete current phase change. However, the device also requires manual operation of the compensation device, so that efficiency and accuracy are to be improved.
SUMMERY OF THE UTILITY MODEL
In view of this, the technical problem to be solved by the present invention is to provide an automatic three-phase load imbalance adjusting device, which can accurately and rapidly perform dynamic tracking and compensation on an unbalanced load.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the three-phase load unbalance automatic adjusting device comprises an unbalance management unit and a three-phase load unbalance automatic adjusting terminal, wherein the unbalance management unit consists of a second current transformer and an insulated gate bipolar transistor module, and the second current transformer is connected with the insulated gate bipolar transistor module; and the insulated gate bipolar transistor module is connected with the three-phase load imbalance automatic regulation terminal through a communication line.
The three-phase load unbalance automatic mediation terminal is further provided with a first current transformer, a digital-to-analog converter, a display module, a data storage device, a signal processor and a data remote communication interface, the first current transformer collects signals to the digital-to-analog converter, the digital-to-analog converter transmits the signals to the signal processor, the signal processor and the data storage device transmit data in a two-way mode, and the signal processor is connected with the display module, a power supply and the remote communication interface.
And the mutual inductor of the three-phase load unbalance automatic regulation terminal is connected with a distribution transformer to acquire current data of a low-voltage side of a distribution transformer.
And the three-phase load unbalance automatic regulation terminal is connected with the phase change switch module through a data remote communication interface to execute phase change switch operation.
The data memory arranged on the three-phase load imbalance automatic mediation terminal comprises a flash memory and a static random access memory.
And the signal processor arranged on the three-phase load imbalance automatic regulation terminal is connected with the insulated gate bipolar transistor module through a communication line.
The utility model has the advantages that: the utility model adopts advanced power electronic technology and data processing technology, effectively improving the automation and intelligence level; according to the voltage support principle and the capacitive/inductive reactive compensation principle, the adjustment accuracy is effectively improved; the phase change switch, the remote communication interface and the signal processor form a feedback closed loop, so that a feedback signal can be detected in real time and adjusted, and the adjustment efficiency is improved; the unbalanced load can be accurately and rapidly dynamically tracked and compensated; the adjusting precision is high, manual operation is not needed in automatic detection and automatic processing, and the labor cost consumed by operating the traditional compensation equipment is greatly saved.
Drawings
Fig. 1 is the utility model discloses unbalanced three-phase load automatically regulated terminal structure sketch map.
Fig. 2 is the schematic diagram of the unbalanced treatment unit of the utility model.
Detailed Description
The invention is further described with reference to the following figures and examples.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following description will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to fig. 1 and fig. 2 of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
The reference numerals in fig. 1 denote:
1. a distribution transformer; 2. a first current transformer; 3. a digital-to-analog converter; 4. an unbalance management unit; 5. a data storage; 6. a signal processor; 7. a display module; 8. a phase change switch module; 9. a remote communication interface; 10. a power source.
The reference numerals in fig. 2 denote:
11. a power grid; 12. a second current transformer; 13. an insulated gate bipolar transistor module; 14. an unbalanced load.
As shown in fig. 1, an automatic three-phase load imbalance adjusting device includes an imbalance treatment unit 4 and an automatic three-phase load imbalance adjusting terminal; the three-phase load unbalance automatic adjusting terminal mainly comprises a first current transformer 2, a digital-to-analog converter 3, a data memory 5, a signal processor 6, a display module 7 and a remote communication interface 9. The three-phase load unbalance automatic adjusting terminal is connected with a distribution transformer 1, a first current transformer 2 (for example, a BH-0.66 series current transformer produced by Zhengtai) directly monitors a current signal at the low-voltage side of a distribution transformer, and an analog signal is converted into a digital signal which can be identified by a signal processor 6 (for example, an XDS100V3ISO signal processor produced by Han dynasty) through a digital-to-analog converter 3 (for example, an RS485 series A/D digital-to-analog converter produced by Zhongzhen technology); in addition, the signal processor 6 is connected with the commutation switch module 8 through a remote communication interface 9 (for example, a communication interface of model HF7111 manufactured by an internet of things plant), and acquires current and phase sequence data of each load branch of the commutation switch module 8 in real time through a state input loop. The two signal transmission lines form a closed loop feedback loop. The current and phase sequence data measured by the closed loop feedback loop are stored by the data storage device 5 and processed by the signal processor 6, and further control signals are sent to the unbalance management unit 4, and the optimal commutation instructions are sent to the commutation switch modules 8 through the control output loop, so that the three-phase load unbalance is automatically adjusted.
The data memory arranged on the three-phase load imbalance automatic mediation terminal comprises a flash memory and a static random access memory. The flash memory is used for storing programs, and the static random access memory is used for running the programs.
As shown in fig. 2, the imbalance management unit 4 includes a second current transformer 12 and an IGBT module 13, where the second current transformer 12 (for example, a LMK-0.66 current transformer manufactured by delayscraper) is connected to the power grid 11 to detect the system current in real time, and sends the system current information to an internal controller for processing and analysis, so as to determine whether the system is in an imbalance state, and at the same time, calculates a current value required to be converted for each phase when the system reaches a balance state, and then sends a signal to the internal IGBT 13 (for example, an IGBT module manufactured by wah corporation and having a model of FF200R12KS 4) to drive the internal IGBT 13 to convert the imbalance current from a phase with a large current to a phase with a small current, and finally, the imbalance load 14 reaches a three-phase balance state.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. The utility model provides a three-phase unbalanced load automatic regulating apparatus which characterized in that: the three-phase load unbalance automatic regulation terminal comprises an unbalance management unit and a three-phase load unbalance automatic regulation terminal, wherein the unbalance management unit consists of a second current transformer and an insulated gate bipolar transistor module, and the second current transformer is connected with the insulated gate bipolar transistor module; and the insulated gate bipolar transistor module is connected with the three-phase load imbalance automatic regulation terminal through a communication line.
2. The apparatus of claim 1, wherein: the three-phase load unbalance automatic mediation terminal is provided with a first current transformer, a digital-to-analog converter, a display module, a data storage device, a signal processor and a data remote communication interface, wherein the first current transformer collects signals to the digital-to-analog converter, the digital-to-analog converter transmits the signals to the signal processor, the signal processor and the data storage device transmit data in a two-way mode, and the signal processor is connected with the display module, a power supply and the remote communication interface.
3. The apparatus of claim 2, wherein: and a first current transformer of the three-phase load unbalance automatic regulation terminal is connected with a distribution transformer to acquire current data of a low-voltage side of a distribution transformer.
4. The apparatus of claim 2, wherein: and the three-phase load unbalance automatic regulation terminal is connected with the phase change switch module through a data remote communication interface to execute phase change switch operation.
5. The apparatus of claim 2, wherein: the data memory arranged on the three-phase load imbalance automatic mediation terminal comprises a flash memory and a static random access memory.
6. The apparatus of claim 2, wherein: and the signal processor arranged on the three-phase load imbalance automatic regulation terminal is connected with the insulated gate bipolar transistor module through a communication line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021880788.7U CN212784782U (en) | 2020-09-02 | 2020-09-02 | Three-phase unbalanced load automatic regulating apparatus |
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| CN202021880788.7U CN212784782U (en) | 2020-09-02 | 2020-09-02 | Three-phase unbalanced load automatic regulating apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114123254A (en) * | 2021-11-23 | 2022-03-01 | 广东电网有限责任公司 | Multifunctional low-voltage three-phase comprehensive adjusting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114123254A (en) * | 2021-11-23 | 2022-03-01 | 广东电网有限责任公司 | Multifunctional low-voltage three-phase comprehensive adjusting device |
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