CN205565745U - A automatic commutation device for low pressure three phase line - Google Patents
A automatic commutation device for low pressure three phase line Download PDFInfo
- Publication number
- CN205565745U CN205565745U CN201620348324.9U CN201620348324U CN205565745U CN 205565745 U CN205565745 U CN 205565745U CN 201620348324 U CN201620348324 U CN 201620348324U CN 205565745 U CN205565745 U CN 205565745U
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- CN
- China
- Prior art keywords
- relay
- circuit
- commutation
- phase
- control circuit
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- Expired - Fee Related
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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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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model relates to an automatic commutation device for low pressure three phase line, including a control circuit, communication module, power line load information acquisition module, commutation circuit, power module to and the remote control host computer, power line load information acquisition module gathers three phase line's load information, sends the remote control host computer through control circuit and communication module, and the remote control host computer instructs the commutation and sends control circuit through communication module, and control circuit is with commutation instruction issue to power line 1, commutation circuit includes three relay, and two contacts of first relay connect low pressure three phase line's A congruence B looks respectively, and a contact of its public termination second relay, another contact of second relay connect the C looks, a contact of the public termination third relay of second relay, and another contact of third relay connects the load, power module is control circuit and commutation circuit power supply.
Description
Technical field
The utility model belongs to power supply field, relates to a kind of automatic commutation device for low voltage three-phase circuit, for low
Automatic three-phase switching when line ball road three-phase load is uneven or is necessary commutation.
Background technology
China is about 3.5 × 10 in the total capacity of fortune transformer at present9KVA, owing to total number of units is many, capacity is big again, so electric energy
It is lost the biggest.According to statistics, only the electric energy loss the most about 30～50TWh of distribution transformer (abbreviation distribution transforming), accounts for
The 2～3% of gross generation.The inefficient capacity of distribution transform being on active service more than 20 years at electricity online operation at present is about 2.4 × 108KVA,
These distribution transforming parameters are aging simultaneously, loss is high, defect is many, and operational reliability is poor, threatens electric power netting safe running, wherein with three-phase
The loss that load inequality causes is the most prominent.Three-phase load inequality can increase line loss, the utilization rate reducing transformer and threaten operation
Safety, electrical equipment causes scaling loss, causing system voltage three phase deviation relatively big simultaneously, it is many that quality of voltage can not get guarantee etc.
Unfavorable factor.
Summary of the invention
The purpose of this utility model is to provide a kind of automatic commutation device for low voltage three-phase circuit, can be according to load inequality
The automatic commutation of situation, thus realize the relative equilibrium of three-phase load.
The technical solution of the utility model is as follows:
A kind of automatic commutation device for low voltage three-phase circuit, it is characterised in that: include a control circuit, communication module, electricity
Line of force road information on load acquisition module, commutation circuit, power module, and long-range control host machine, described power circuit load is believed
Breath acquisition module gathers voltage and the current capacity information of A, B, C three-phase line by voltage transformer summation current transformer,
And be transferred to described control circuit, control circuit by communication module by the voltage of circuit and current capacity information by wired or nothing
Line mode is sent to long-range control host machine, and commutation instruction is sent to control circuit through communication module by described long-range control host machine, control
The commutation of long-range control host machine is instructed and is sent to commutation circuit by circuit processed；Described commutation circuit includes the first relay, second continues
Electrical equipment and the 3rd relay, wherein the first relay and the second relay are conversion hysteria relay, and the 3rd relay is common relay
Device, two contacts of the first relay connect A phase and the B phase of low voltage three-phase circuit respectively, the one of its public termination the second relay
Individual contact, another contact of the second relay connects C phase, a contact of public termination the 3rd relay of the second relay, the
Another contact of three relays connects load；Described power module is control circuit and commutation circuit is powered.
The utility model can be sent to long-range control host machine, far according to the information on load of circuit A, B, C three-phase of Real-time Collection
Process control main frame is according to the information on load of A, B, C three-phase, uneven at three-phase load, send commutation instruction when being necessary commutation,
Realize automatically switching, reduce manual operation, ensure the safety of line upkeep.
Accompanying drawing explanation
Fig. 1 is building-block of logic of the present utility model；
Fig. 2 is line information collection of the present utility model and transmission principle figure；
Fig. 3 is commutation circuit schematic diagram of the present utility model；
Fig. 4 is that power module of the present utility model is from circuit power taking schematic diagram.
Detailed description of the invention
As it is shown in figure 1, a kind of automatic commutation device for low voltage three-phase circuit that the utility model provides, including a control electricity
Road 1, communication module 2, power circuit information on load acquisition module 3, commutation circuit 4, power module 5, and remotely control
Main frame 6.When being embodied as, the control circuit 1 of this device, communication module 2, power circuit information on load acquisition module 3, change
Circuitry phase 4, power module 5, can be integrated in a housing 7, it is simple to equipment is installed.Control circuit 1 therein can use general
Logical single-chip microcomputer.
Fig. 2 is line information collection of the present utility model and transmission principle figure, and described power circuit information on load acquisition module passes through
The voltage transformer summation current transformer being arranged on A, B, C three-phase line gathers the voltage at this device and current capacity information.
Power circuit information on load acquisition module can be obtained three-phase voltage at this device by AD acquisition chip or the special metering IC, be born
The information such as charged pressure, electric current, active power, reactive power, and it is transferred to described control circuit, control circuit is by communication mould
Voltage and the current capacity information of circuit are sent to long-range control host machine by wired or wireless mode by block.
Described long-range control host machine automatically determines whether commutation according to the parameter preset, and commutation instruction is sent to through communication module
Control circuit, the commutation of long-range control host machine is instructed and is sent to commutation circuit by control circuit.
Described commutation circuit includes the first relay, the second relay and the 3rd relay, wherein the first relay and the second relay
Device is conversion hysteria relay, and the 3rd relay is common relay, and two contacts of the first relay connect low voltage three-phase circuit respectively
A phase and B phase, a contact of its public termination the second relay, another contact of the second relay connects C phase, and second continues
One contact of public termination the 3rd relay of electrical equipment, another contact of the 3rd relay connects load.Commutation circuit performs control
Circuit processed sends the commutation come and instructs and realize commutation action.
It is a kind of embodiment of commutation circuit shown in Fig. 3, uses the structure of three relay interlockings to realize commutation, and three can be ensured
Electricity is the most short-circuit mutually, and wherein relay R LY1 and relay R LY2 are conversion hysteria relay, and relay R LY3 is common relay.
Two contacts of relay R LY1 connect A phase, B phase respectively, a contact of common port contact relay RLY2, relay R LY2
To connect C phase electric in another contact, a contact of the common port contact relay RLY3 of relay R LY2, relay R LY3 another
One contact connects load.
Embodiment illustrated in fig. 3 also includes that the controllable silicon in parallel with relay R LY3 is to assist switching；By controlling relay deciliter
Lock and controllable silicon folding realize load commutation.Control signal and executable portion are all isolated by the symplectic signal of light.
Described power module is control circuit and commutation circuit is powered.Power module can be powered by self-contained battery, it is possible to logical
Directly from low voltage three-phase circuit, power taking is as power supply to cross CT electricity getting device, and power supply provides two-way output, and a road is for controlling
Circuit small-signal use, another road works for commutation circuit relay.
Power circuit principle figure shown in Fig. 4, power module come to whole device by power taking direct on low voltage three-phase circuit and
Load supplying；Can be selected for the heterogeneous power taking of A, B, C to be powered, to ensure that device still has electricity when phase shortage.
Claims (2)
1. the automatic commutation device for low voltage three-phase circuit, it is characterised in that: include a control circuit, communication module,
Power circuit information on load acquisition module, commutation circuit, power module, and long-range control host machine, described power circuit load
Information acquisition module gathers voltage and the current capacity information of A, B, C three-phase line by voltage transformer summation current transformer,
And be transferred to described control circuit, control circuit by communication module by the voltage of circuit and current capacity information by wired or nothing
Line mode is sent to long-range control host machine, and commutation instruction is sent to control circuit through communication module by described long-range control host machine, control
The commutation of long-range control host machine is instructed and is sent to commutation circuit by circuit processed；Described commutation circuit includes the first relay, second continues
Electrical equipment and the 3rd relay, wherein the first relay and the second relay are conversion hysteria relay, and the 3rd relay is common relay
Device, two contacts of the first relay connect A phase and the B phase of low voltage three-phase circuit respectively, the one of its public termination the second relay
Individual contact, another contact of the second relay connects C phase, a contact of public termination the 3rd relay of the second relay, the
Another contact of three relays connects load；Described power module is control circuit and commutation circuit is powered.
Automatic commutation device for low voltage three-phase circuit the most according to claim 1, it is characterised in that: described power supply
Module passes through the directly power taking from low voltage three-phase circuit of CT electricity getting device, and power supply provides two-way output, and a road is little for control circuit
Signal use, another road works for commutation circuit relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620348324.9U CN205565745U (en) | 2016-04-22 | 2016-04-22 | A automatic commutation device for low pressure three phase line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620348324.9U CN205565745U (en) | 2016-04-22 | 2016-04-22 | A automatic commutation device for low pressure three phase line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205565745U true CN205565745U (en) | 2016-09-07 |
Family
ID=56807039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620348324.9U Expired - Fee Related CN205565745U (en) | 2016-04-22 | 2016-04-22 | A automatic commutation device for low pressure three phase line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205565745U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107147113A (en) * | 2017-06-05 | 2017-09-08 | 泰豪科技股份有限公司 | A kind of phase change method and device without phase fault |
| CN108063446A (en) * | 2017-12-20 | 2018-05-22 | 厦门宏发电力电器有限公司 | A kind of three-phase phase reversal relay combining structure |
-
2016
- 2016-04-22 CN CN201620348324.9U patent/CN205565745U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107147113A (en) * | 2017-06-05 | 2017-09-08 | 泰豪科技股份有限公司 | A kind of phase change method and device without phase fault |
| CN108063446A (en) * | 2017-12-20 | 2018-05-22 | 厦门宏发电力电器有限公司 | A kind of three-phase phase reversal relay combining structure |
| CN108063446B (en) * | 2017-12-20 | 2024-05-14 | 厦门宏发电力电器有限公司 | Three-phase change relay combination structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160907 Termination date: 20180422 |