CN211720266U - Three-phase unbalanced power supply regulation transmission cabinet device - Google Patents
Three-phase unbalanced power supply regulation transmission cabinet device Download PDFInfo
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- CN211720266U CN211720266U CN202020444602.7U CN202020444602U CN211720266U CN 211720266 U CN211720266 U CN 211720266U CN 202020444602 U CN202020444602 U CN 202020444602U CN 211720266 U CN211720266 U CN 211720266U
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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
- Y02E40/30—Reactive power compensation
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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 an unbalanced three phase power supply is adjusted and is become and send cabinet device, including power transformer, unbalanced load, controller, IGBT drive module, three-phase current-limiting reactor and three-phase filter reactor, power transformer carries voltage to controller and three-phase current-limiting reactor, and unbalanced load and three-phase filter reactor are still connected respectively to three-phase current-limiting reactor, and IGBT contravariant module is still connected to three-phase filter reactor, and the controller still connects IGBT contravariant module through IGBT drive module, the utility model discloses mainly used low voltage power supply equipment terminal, but automatically regulated administers three-phase current unbalanced, and phase voltage deviation and phase line electricity are uneven and compensate idle, optimize the electric energy quality. The specification of the SPC product covers 50A/35kvar,75A/50kvar and 150A/100kvar, and three-phase unbalanced current and reactive power can be simultaneously compensated, so that continuous and dynamic compensation is realized.
Description
Technical Field
The utility model relates to an electric wire netting field specifically is an unbalanced three phase power supply is adjusted and is become and send cabinet device.
Background
The existing power grid has the following defects:
1. the three-phase imbalance is serious:
as the user side of the 400V low-voltage distribution system is almost all single-phase loads and the electricity consumption has non-timeliness, the distribution transformer system is easy to generate three-phase imbalance, and the imbalance degree seriously exceeds the standard.
2. The voltage qualification rate is lower:
the power supply radius of the 400V low-voltage power distribution system is long, and the voltage is easily caused to exceed the limit value due to the influence of three-phase imbalance and power utilization high and low time periods.
3. The power factor is low:
the distribution transformer widely uses a grouping switching electric boundary device, has a compensation step, and has poor compensation effect (excessive compensation or insufficient compensation is easy to occur).
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an unbalanced three phase power supply is adjusted and is become and send cabinet device to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a three-phase unbalanced power supply regulation transformer cabinet device comprises a power transformer, an unbalanced load, a controller, an IGBT driving module, a three-phase current-limiting reactor and a three-phase filter reactor, wherein the power transformer transmits voltage to the controller and the three-phase current-limiting reactor, the three-phase current-limiting reactor is also respectively connected with the unbalanced load and the three-phase filter reactor, the three-phase filter reactor is also connected with an IGBT inversion module, the controller is also connected with the IGBT inversion module through the IGBT driving module, the power transformer is connected with the controller and the three-phase current-limiting reactor through a three-phase switch K1, a three-phase switch K1 comprises a switch Ka, a switch Kb and a switch Kc, a three-phase switch K1 comprises a switch Ka, a switch Kb and a switch Kc which are respectively connected on a A, B, C three-phase circuit, the transmission currents of the A, B, C three-phase circuit are, the three independent reactor units are respectively connected to the A, B, C three-phase circuit, the three-phase filter reactor comprises three independent filter reactors, and the three independent current-limiting reactors are respectively connected with the three independent filter reactors.
As a further technical solution of the present invention: the controller is a PLC or a single chip microcomputer.
As a further technical solution of the present invention: and a three-phase switch K2 is arranged between the three-phase current-limiting reactor and the three-phase filter reactor.
As a further technical solution of the present invention: the controller is a PLC or a single chip microcomputer.
As a further technical solution of the present invention: one side of the unbalanced load is grounded.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses mainly used low pressure power supply unit terminal, but automatically regulated administers three-phase current unbalance, and uneven and the compensation of looks phase voltage deviation and phase line electricity are idle, optimize the electric energy quality. The specification of the SPC product covers 50A/35kvar,75A/50kvar and 150A/100kvar, and three-phase unbalanced current and reactive power can be simultaneously compensated, so that continuous and dynamic compensation is realized.
Drawings
Fig. 1 is a circuit diagram 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 creative work belong to the protection scope of the present invention.
Example 1: referring to fig. 1, a three-phase unbalanced power supply regulation transformer cabinet device comprises a power transformer, an unbalanced load, a controller, an IGBT driving module, a three-phase current limiting reactor and a three-phase filter reactor, and is characterized in that the power transformer transmits voltage to the controller and the three-phase current limiting reactor, the three-phase current limiting reactor is further connected with the unbalanced load and the three-phase filter reactor respectively, the three-phase filter reactor is further connected with an IGBT inverter module, the controller is further connected with the IGBT inverter module through the IGBT driving module, the power transformer is connected with the controller and the three-phase current limiting reactor through a three-phase switch K1, the three-phase switch K1 comprises a switch Ka, a switch Kb and a switch Kc, the three-phase switch K1 comprises a switch Ka, a switch Kb and a switch Kc which are connected to a A, B, C three-phase circuit respectively, and the transmission currents of the A, B, C three, the three-phase current-limiting reactor comprises three independent current-limiting reactors, three independent reactor units are respectively connected to the A, B, C three-phase circuit, the three-phase filter reactor comprises three independent filter reactors, and the three independent current-limiting reactors are respectively connected with the three independent filter reactors. The power transformer is connected with the controller and the three-phase current-limiting reactor through a three-phase switch K1. And a three-phase switch K2 is arranged between the three-phase current-limiting reactor and the three-phase filter reactor. One side of the unbalanced load is grounded.
The design can compensate in real time, the response time is less than 15 milliseconds, the NADSPC is an active compensation device, a current source device is formed by adopting modern power electronic devices IGBT, the resonance phenomenon caused by traditional capacitance components is avoided in principle, and the device 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.
The fully-controlled equipment is maintenance-free, so that the labor cost is saved;
the NADSPC adopts advanced power electronic technology and data processing technology, automatically detects the change of each phase current in a power grid system, calculates and sends out required compensating current in real time, so that the power grid can quickly reach a balanced state. The whole process is automatically completed by the equipment without manual operation, and the labor cost consumed by operating the traditional compensation equipment is greatly saved.
Multiple protection, adaptation to various severe environments;
the inner core equipment of the NADSPC has various protection functions: overvoltage protection, undervoltage protection, overcurrent protection, short-circuit protection, etc
The cabinet body of NADSPC possesses the protect function: low-voltage lightning protection and leakage protection, and IP protection grade: IP 44.
The three-phase unbalance compensation principle is as follows:
after the NADSPC is started, the system current is detected in real time through an external Current Transformer (CT), system current information is sent to an internal controller for processing and analysis, whether the system is in an unbalanced state or not is judged, meanwhile, the current value required to be converted by each phase when the system reaches a balanced state is calculated, then, signals are sent to an internal IGBT and are driven to act, the unbalanced current is transferred from a phase with large current to a phase with small current, and finally, a three-phase balanced state is achieved.
Example 2: on the basis of the embodiment 1, the controller is a PLC or a single chip microcomputer. The two controllers have small volume and convenient use.
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.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. A three-phase unbalanced power supply regulation transformer cabinet device comprises a power transformer, an unbalanced load, a controller, an IGBT driving module, a three-phase current-limiting reactor and a three-phase filter reactor, and is characterized in that the power transformer transmits voltage to the controller and the three-phase current-limiting reactor, the three-phase current-limiting reactor is also respectively connected with the unbalanced load and the three-phase filter reactor, the three-phase filter reactor is also connected with an IGBT inversion module, the controller is also connected with the IGBT inversion module through the IGBT driving module, the power transformer is connected with the controller and the three-phase current-limiting reactor through a three-phase switch K1, a three-phase switch K1 comprises a switch Ka, a switch Kb and a switch Kc, the three-phase switch K1 comprises a switch Ka, a switch Kb and a switch Kc which are respectively connected on a A, B, C three-phase circuit, the transmission currents of the A, B, C three-phase circuit are, the three independent reactor units are respectively connected to the A, B, C three-phase circuit, the three-phase filter reactor comprises three independent filter reactors, and the three independent current-limiting reactors are respectively connected with the three independent filter reactors.
2. The device of claim 1, wherein the controller is a PLC or a single chip microcomputer.
3. The device as claimed in claim 1, wherein a three-phase switch K2 is provided between the three-phase current limiting reactor and the three-phase filter reactor.
4. A three-phase unbalanced supply regulation substation apparatus as set forth in claim 3, wherein one side of said unbalanced load is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020444602.7U CN211720266U (en) | 2020-03-31 | 2020-03-31 | Three-phase unbalanced power supply regulation transmission cabinet device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020444602.7U CN211720266U (en) | 2020-03-31 | 2020-03-31 | Three-phase unbalanced power supply regulation transmission cabinet device |
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| CN211720266U true CN211720266U (en) | 2020-10-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115207915A (en) * | 2022-08-04 | 2022-10-18 | 广东元极科技实业有限公司 | Power transmission and distribution switching type comprehensive adjusting device and control method thereof |
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- 2020-03-31 CN CN202020444602.7U patent/CN211720266U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115207915A (en) * | 2022-08-04 | 2022-10-18 | 广东元极科技实业有限公司 | Power transmission and distribution switching type comprehensive adjusting device and control method thereof |
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