CN207853480U - Uneven low-voltage controlling device - Google Patents
Uneven low-voltage controlling device Download PDFInfo
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- CN207853480U CN207853480U CN201820239225.6U CN201820239225U CN207853480U CN 207853480 U CN207853480 U CN 207853480U CN 201820239225 U CN201820239225 U CN 201820239225U CN 207853480 U CN207853480 U CN 207853480U
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- voltage regulating
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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
-
- 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
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Abstract
The utility model discloses a kind of uneven low-voltage controlling devices, including transmission line of electricity, detection and control terminal, signal acquisition module, communication module, man-machine interface, data memory module, imbalance compensation module and voltage regulating module, transmission line of electricity includes passing through the sequentially connected detection circuit of linked switch, compensated line and voltage regulating line, detection and control terminal passes through collection voltages and the signal acquisition module of current signal and detection connection, detection and control terminal is connect by communication interface with the voltage regulating module being arranged on voltage regulating line, and imbalance compensation module is arranged between detection and control terminal and voltage regulating module and is connect with compensated line；The utility model realizes that quickly connection, wired in parallel are run, equipment dilatation is realized in simple environment by carrying out plug-in connection between imbalance compensation module, voltage regulating module and detection and control terminal；More times of zero curve compensation abilitys eliminate neutral line current, reduce line loss, have the improvement of processing three-phase imbalance and low-voltage abatement functions.
Description
Technical field：
The utility model is related to a kind of supply lines to balance controlling device, be administered more particularly to a kind of uneven low-voltage
Device.
Background technology：
With the improvement of living standards, the increase of power load, part circuit low voltage is caused, line load is seriously not
Balance.Transformer overload can be caused to burn, affected to power supply enterprise and people's lives.Individual low-voltage is controlled
Reason cannot be such that line load balances, larger to threephase load fluctuation, and unbalanced occasion adaptability is poor.Benefit device is adjusted generally to pacify
Mounted in distribution transforming side, the line loss and low-voltage of branch line current imbalance can not be solved the problems, such as.In addition its uneven force adjustment knack in
The power factor of low-voltage network.And low-pressure system inductive reactive power is less at present, power factor is higher, therefore adjusts and mend device injustice
The regulating power that weighs is general, current less use.The device that imbalance is administered cannot promote line voltage distribution, and track remodelling cost is too
It is high.Therefore it is used and unsatisfactory the method that existing uneven improvement type low-voltage is administered, and innovation and is improved gesture and is existed
It must go.
Utility model content：
Technical problem to be solved in the utility model is：Overcome the deficiencies of the prior art and provide a kind of simple in structure, tool
The uneven low-voltage controlling device that standby processing three-phase imbalance is administered and low-voltage is administered.
The technical solution of the utility model is：A kind of imbalance low-voltage controlling device, including transmission line of electricity, observing and controlling end
End, signal acquisition module, communication module, man-machine interface, data memory module, imbalance compensation module and voltage regulating module, it is described
Transmission line of electricity includes by the sequentially connected detection circuit of linked switch, compensated line and voltage regulating line, and the detection and control terminal is logical
The signal acquisition module and the detection connection, the detection and control terminal for crossing collection voltages and current signal pass through communication interface
It is connect with the voltage regulating module being arranged on voltage regulating line, and the imbalance compensation module is arranged in the detection and control terminal and pressure regulation
It is connect between module and with the compensated line, the imbalance compensation module includes dsp controller and three imbalance compensations
Device, the imbalance compensation device include circuit breaker Q 1, pre-charge resistance R, relay switch Q2, filter inductance L, voltage-type
PWM rectifier bridges and dc-link capacitance C, the circuit breaker Q 1, relay switch Q2, filter inductance L, voltage type PWM rectifier bridge
It is sequentially connected in series with dc-link capacitance C, the pre-charge resistance R is in parallel with relay switch Q2, the circuit breaker Q 1 and relay
Device switch Q2 is connect with dsp controller.
Three imbalance compensation devices are connected respectively at A phases, the B phases in compensated line with C, the pressure regulation mould
The outlet terminal of block is connect with voltage regulating line, and the input terminal of the voltage regulating module is connect with compensated line.
The detection circuit, compensated line and voltage regulating line include A phase, B phase, C phase and zero phase.The detection and control terminal is
STM32F103 chips, the voltage regulating module are ZBDVR-60-0.4 voltage regulating modules, and model is provided on the compensated line
The arrester of HY1.5W-0.28.
The detection and control terminal, imbalance compensation module and voltage regulating module are by internal communication module and total using 485
Line and 485 sockets carry out plug-in connection, and the detection and control terminal is connect with data storage module and human-machine exchange module.
The utility model has the beneficial effects that：
1, the utility model by between imbalance compensation module, voltage regulating module and detection and control terminal carry out plug-in connection,
It realizes that quickly connection, wired in parallel are run, equipment dilatation is realized in simple environment；More times of zero curve compensation abilitys eliminate zero curve electricity
Stream reduces line loss, has the improvement of processing three-phase imbalance and low-voltage abatement functions.
2, the utility model power transmission line is divided into through the sequentially connected detection circuit of multigang switch, compensated line and line pressure regulator
Road facilitates it to carry out quick on-off operation.
3, when the utility model voltage regulating module is that controller detects that utilization voltage is relatively low, constant situation is stablized in compensation
Under, according to the afterflow of transition resistance effect ensure switching when no-flashy-flow, without power-off in the case of, switch over, maintain transformation
Device output voltage is constant and compensation load changes.
4, when the utility model imbalance compensation module is that controller detects that threephase load degree of unbalancedness reaches setting value,
Controller utilizes 485 communication transfers, sends instruction and carries out the imbalance compensation device work in the block of imbalance compensation mould.
Description of the drawings：
Fig. 1 is the schematic diagram of uneven low-voltage controlling device.
Fig. 2 is the structural schematic diagram of uneven low-voltage controlling device.
Fig. 3 is voltage regulating module system diagram.
Fig. 4 is the electrical connection schematic diagram of imbalance compensation device.
Specific implementation mode：
Embodiment：Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4.
A kind of imbalance low-voltage controlling device, including transmission line of electricity, detection and control terminal, signal acquisition module, communication module,
Man-machine interface, data memory module, imbalance compensation module and voltage regulating module, transmission line of electricity include being connected successively by linked switch
Detection circuit, compensated line and the voltage regulating line connect, the signal acquisition module that detection and control terminal passes through collection voltages and current signal
With detection connection, detection and control terminal is connect by communication interface with the voltage regulating module being arranged on voltage regulating line, and uneven
Compensating module is arranged between detection and control terminal and voltage regulating module and is connect with compensated line, and imbalance compensation module includes DSP controls
Device processed and three imbalance compensation devices, imbalance compensation device include circuit breaker Q 1, pre-charge resistance R, relay switch Q2,
Filter inductance L, voltage type PWM rectifier bridge and dc-link capacitance C, circuit breaker Q 1, relay switch Q2, filter inductance L, voltage
Type PWM rectifier bridges and dc-link capacitance C are sequentially connected in series, and pre-charge resistance R is in parallel with relay switch Q2, circuit breaker Q 1 and after
Electric switch Q2 is connect with dsp controller.
Three imbalance compensation devices are connected respectively at A phases, the B phases in compensated line with C, the outlet of voltage regulating module
Terminal is connect with voltage regulating line, and the input terminal of voltage regulating module is connect with compensated line.Detect circuit, compensated line and pressure regulation
Circuit includes A phase, B phase, C phase and zero phase.
Detection and control terminal is STM32F103 chips, and voltage regulating module is ZBDVR-60-0.4 voltage regulating modules, is arranged on compensated line
There is the arrester of model HY1.5W-0.28.
Detection and control terminal, imbalance compensation module and voltage regulating module by internal communication module and using 485 buses and
485 sockets carry out plug-in connection, and detection and control terminal is connect with data storage module and human-machine exchange module.
The course of work：Signal acquisition module setting is transferred on detection line road, and the voltage and current signals of acquisition
Detection and control terminal, detection terminal are handled according to the information received, and then by communication interface, treated, information is sent
To the imbalance compensation module being connect with compensated line and the voltage regulating module being connect with voltage regulating line, then pass through detection and control terminal control
Imbalance compensation module processed and voltage regulating module do unbalanced principle according to pressure regulation after first compensating and are controlled again, rate-determining steps
For：
A, it is realized by the switching of imbalance compensation mould capacitance compensation pattern in the block advanced to electric current or lagging voltage
Compensating operation, compensation process are：
1）In advance：Capacitance compensation is added, can carry out A, B, C phase splitting compensation according to actual idle amount per phase compensation rate, make
The power factor of power grid reaches between 0.98-1；
2）Lag：It carries out exiting capacitance compensation, A, B, C split-phase can be carried out according to actual idle amount per mutually excision capacitance
Compensation is exited, between so that the power factor of power grid is reached 0.98-1；
B, when detection and control terminal detects that voltage is relatively low, compensation stablize it is constant in the case of, according to the afterflow of transition resistance make
With ensure switching when no-flashy-flow, without power-off in the case of, switch over, maintain transformer output voltage it is constant and compensation load
Variation.
C, when detection and control terminal detects that threephase load degree of unbalancedness reaches setting value, detection and control terminal utilizes 485 communication transfers,
Dsp controller controls the imbalance compensation module work in the block of imbalance compensation mould.
Whether D, dsp controller detects load current in real time, calculate analysis load current and judge compensated line in not
Equilibrium state isolates positive-sequence component, negative sequence component and the zero-sequence component of out-of-balance current, and then dsp controller drives in real time
IGBT, STUR send out the electric current reversed with negative sequence component and zero-sequence component, finally reach three-phase equilibrium state.
The degree of unbalancedness of threephase load is to subtract minimum value again according to the maximum value of three-phase divided by maximum value is multiplied by percent
Hundred, as the percentage of degree of unbalancedness, such as A phase 50A, B phase 43A, C phase 48A, 50-43=7,7/50=0.14, when degree of unbalancedness is set
Controller is transmitted using 485 communication instructions when setting value less than 14%, and sending instruction makes imbalance compensation module work.
Imbalance compensation module includes dsp controller and three imbalance compensation devices, and imbalance compensation device includes disconnected
Road device Q1, pre-charge resistance R, relay switch Q2, filter inductance L, voltage type PWM rectifier bridge and dc-link capacitance C, open circuit
Device Q1, relay switch Q2, filter inductance L, voltage type PWM rectifier bridge and dc-link capacitance C are sequentially connected in series, pre-charge resistance
R is in parallel with relay switch Q2, and circuit breaker Q 1 and relay switch Q2 are connect with dsp controller.
Fig. 3 is voltage regulating module system diagram, and end transformer outlet voltage is US, and load current forms voltage on the line
Drop, when circuit is long or load increases, the voltage at L2 is likely lower than the minimum value of rated voltage permission, at L2
One series regulation is installed, device is in boost mode, by voltage increase Δ U, the voltage UL of load side is made to be promoted to U+
Δ U, to reach load voltage value；The principle is equally applicable to reduction regulation.
Fig. 4 is the electrical connection schematic diagram of imbalance compensation device, wherein the control of circuit breaker Q 1 is main to be inputted into electric current；
Resistance R is the pre-charge resistance of system, and after Q1 is closed, system busbar capacitance voltage slowly charges；Relay switch Q1 controls
The input of main road alternating current, at the same pre-charge resistance R is short-circuit；Inductance is the power between power converter and electric system
Interface element is transmitted, on the one hand plays energy storage, on the other hand filters out high frequency switching ripple electric current；Voltage type PWM rectifier bridge is
Power conversion components, by igbt（IGBT）It constitutes, applied voltage space vector modulation（SVPWM）Technology humanized
IGBT generates compensation current waveform；DC capacitor module stores the DC energy generated through IGBT power conversion modules.
The above descriptions are merely preferred embodiments of the present invention, not makees in any form to the utility model
Limitation, it is made by the above technical examples according to the technical essence of the present invention it is any it is simple modification, equivalent variations with
Modification, is still within the scope of the technical solutions of the present invention.
Claims (5)
1. a kind of imbalance low-voltage controlling device, including transmission line of electricity, detection and control terminal, signal acquisition module, communication module, people
Machine interface, data memory module, imbalance compensation module and voltage regulating module, it is characterized in that：The transmission line of electricity includes passing through connection
Dynamic to switch sequentially connected detection circuit, compensated line and voltage regulating line, the detection and control terminal passes through collection voltages and electric current is believed
Number signal acquisition module and the detection connection, the detection and control terminal by communication interface be arranged on voltage regulating line
Voltage regulating module connection, and the imbalance compensation module be arranged between the detection and control terminal and voltage regulating module and with the benefit
Connection is repaid, the imbalance compensation module includes dsp controller and three imbalance compensation devices, the imbalance compensation
Device includes circuit breaker Q 1, pre-charge resistance R, relay switch Q2, filter inductance L, voltage type PWM rectifier bridge and DC bus
Capacitance C, the circuit breaker Q 1, relay switch Q2, filter inductance L, voltage type PWM rectifier bridge and dc-link capacitance C are successively
Series connection, the pre-charge resistance R is in parallel with relay switch Q2, the circuit breaker Q 1 and relay switch Q2 and dsp controller
Connection.
2. imbalance low-voltage controlling device according to claim 1, it is characterized in that：Three imbalance compensation devices
It is connected with C respectively at A phases, the B phases in compensated line, the outlet terminal of the voltage regulating module is connect with voltage regulating line, and institute
The input terminal for stating voltage regulating module is connect with compensated line.
3. imbalance low-voltage controlling device according to claim 2, it is characterized in that：The detection circuit, compensated line
Include A phase, B phase, C phase and zero phase with voltage regulating line.
4. imbalance low-voltage controlling device according to claim 1, it is characterized in that：The detection and control terminal is
STM32F103 chips, the voltage regulating module are ZBDVR-60-0.4 voltage regulating modules, and model is provided on the compensated line
The arrester of HY1.5W-0.28.
5. imbalance low-voltage controlling device according to claim 1, it is characterized in that：The detection and control terminal, uneven benefit
Module is repaid to connect with 485 sockets progress plug-in by internal communication module and 485 buses of use with voltage regulating module, it is described
Detection and control terminal is connect with data storage module and human-machine exchange module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820239225.6U CN207853480U (en) | 2018-02-10 | 2018-02-10 | Uneven low-voltage controlling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820239225.6U CN207853480U (en) | 2018-02-10 | 2018-02-10 | Uneven low-voltage controlling device |
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| Publication Number | Publication Date |
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| CN207853480U true CN207853480U (en) | 2018-09-11 |
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| CN201820239225.6U Active CN207853480U (en) | 2018-02-10 | 2018-02-10 | Uneven low-voltage controlling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301846A (en) * | 2018-02-10 | 2019-02-01 | 新乡市中宝电气有限公司 | Uneven low-voltage controlling device and method |
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2018
- 2018-02-10 CN CN201820239225.6U patent/CN207853480U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301846A (en) * | 2018-02-10 | 2019-02-01 | 新乡市中宝电气有限公司 | Uneven low-voltage controlling device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Torch Park V (A-F) (5-7), high tech Zone, 1789 Xinfei Avenue, Xinxiang City, Henan Province, 453000 Patentee after: Zhongbao Electric Co.,Ltd. Address before: Torch Park V (A-F) (5-7), high tech Zone, 1789 Xinfei Avenue, Xinxiang City, Henan Province, 453000 Patentee before: XINXIANG STRONG POWER ELECTRIC Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |