CN205583706U - Three -phase unbalanced load adjusting device - Google Patents
Three -phase unbalanced load adjusting device Download PDFInfo
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- CN205583706U CN205583706U CN201620379347.6U CN201620379347U CN205583706U CN 205583706 U CN205583706 U CN 205583706U CN 201620379347 U CN201620379347 U CN 201620379347U CN 205583706 U CN205583706 U CN 205583706U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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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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- 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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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
- 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
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Abstract
The utility model discloses a three -phase unbalanced load adjusting device, switch the module and load access module more than two including three current transformer, voltage sensor, intelligent control ware, load, the inner structure of load access module is identical more than two, three current transformer installs in the A of device, B, C three -phase AC inlet wire end, measures three -phase AC inlet wire electric current, voltage sensor's input is introduced from A, B, C three -phase AC inlet wire end, measures three -phase AC inlet wire voltage, the intelligent control ware comprises a central processing unit, current detection unit, voltage detection unit, synchronous detection unit, memory cell and communication unit 0, when the unbalanced load degree exceeds standard requirements, but device automatic switch -over single -phase load inserts electric power system's phase line, makes three phase loads tend to balance, and switches over the outage of in -process load nothing, does not influence general domestic appliance's normal use. In low -voltage power supply network, it is a low cost and direct effectual mode to adjust electric wire netting unbalanced three phase through three -phase unbalanced load adjusting device, has very high feasibility and higher economic benefits.
Description
Technical field
This utility model relates to low voltage electric network electric and electronic technical field, particularly relates to a kind of three-phase load unbalance adjusting apparatus.
Background technology
In the upgrading of rural power grids, take and such as distribution transformer is arranged on load center, shorten the measure such as radius of electricity supply, selection larger sectional area wire, significantly improve rural low voltage network situation, construct a good electrical network " hardware ".
After the upgrading of rural power grids and " same price and grid " are implemented, substantial amounts of high-power household electrical appliance enter common people house, cause single-phase load to increase sharply, and the problem of three-phase load unbalance is increasingly severe, causes operation of power networks situation to be deteriorated.Three-phase load unbalance, a phase or biphase abnormal heavy, the voltage drop of circuit will be increased, reduce the quality of voltage of user, affect the production of user, household electricity；When three-phase current unbalance degree is bigger, the zero-sequence current produced is the biggest, the most even can blow system zero line, make load neutral point to the big phase shift of load, the phase voltage that load is big reduces, the phase voltage that load is little then can raise, if the voltage after Sheng Gaoing substantially exceeds the rated voltage of low-voltage electrical apparatus, then can cause the accident that a large amount of household electrical appliance of user burn；Three-phase load unbalance, makes transformator and low voltage electric network loss increase, transformator and circuit can be caused to burn because heating is serious, on the one hand power supply cost is increased, on the other hand interruption maintenance can cause long-time power failure, reduces power supply reliability, have impact on the economic benefit of power supply enterprise.
Current domestic solution this problem of low-voltage distribution network three-phase load unbalance, it is common that use manual switching single-phase load to power the mode of phase, but this method also exists certain limitation.On the one hand, owing to load variations is frequent, needs often to switch adjustment, add human cost；On the other hand, manual switching needs configuration load monitoring device, to guarantee the correctness of load commutation, and needs during commutation first to have a power failure load to operate again, and the power off time of load often to have had a strong impact on the normal electricity consumption of user more than 30 minutes.
This utility model is for above-mentioned situation, devise a kind of three-phase load unbalance adjusting apparatus, this device can monitor the electric current of electrical network three-phase load, magnitude of voltage in real time, and calculate the instantaneous value of three-phase load unbalance degree, when load unbalanced degree is beyond the requirement of standard, device can control the switching of switch by intelligent controller, and automatic switchover single-phase load accesses the phase line of power system, making load unbalanced degree reduce, three-phase load tends to balance.In handoff procedure, the dead electricity time of single-phase load was determined by the switching time switched, (according to GB/T30137-2013 within caning be controlled in 10 milliseconds, Voltage Drop within 10 milliseconds is not considered as voltage termination), do not affect the normal use of general household electrical appliance, it can be considered that load switching process is without power-off.In low voltage electric network, it is adjusted electrical network three-phase imbalance being a kind of effective manner with low cost and direct by three-phase load unbalance adjusting apparatus, there is the highest feasibility and higher economic benefit.
Summary of the invention
Goal of the invention of the present utility model is to provide a kind of automatic regulating apparatus for low voltage electric network three-phase load unbalance, this device can monitor the electric current of electrical network three-phase load, magnitude of voltage in real time, calculate and store the instantaneous value of three-phase load unbalance degree, when load unbalanced degree is beyond the requirement of standard, device can control the switching of switch by intelligent controller, automatic switchover single-phase load accesses the phase line of power system, makes load unbalanced degree reduce, and three-phase load tends to balance.In handoff procedure, the dead electricity time of single-phase load was determined by the switching time switched, (according to GB/T30137-2013 within caning be controlled in 10 milliseconds, Voltage Drop within 10 milliseconds is not considered as voltage termination), do not affect the normal use of general household electrical appliance, it can be considered that load switching process is without power-off, and in the phase line handoff procedure of switch, dash current to load is zero, it is ensured that load runs safely and reliably.
This utility model realizes its goal of the invention especially by following technological means: a kind of three-phase load unbalance adjusting apparatus, including three current transformers, voltage sensor, intelligent controller, load switching module and two (or two or more) load AM access modules, the internal structure of said two (or two or more) load AM access module is identical.Described three current transformers are installed on A, B, C three-phase alternating current end of incoming cables of device, measure three-phase alternating current inlet wire current；The input of described voltage sensor, from A, B, C three-phase alternating current end of incoming cables introducing, measures three-phase alternating current primary voltage；Described intelligent controller is made up of CPU, current detecting unit, voltage detection unit, synchronous detection unit, memory element and communication unit 0；The internal structure of described load AM access module is identical, respectively by driver element 0, signal generating unit 0, communication unit 1 and four gate-controlled switch K11, K12, K13, K14 compositions；Described load switching module is made up of driver element 01, driver element 02, signal generating unit 1, communication unit 2, three gate-controlled switches K1, K2, K3 and three high-speed switches S1, S2, S3.Inside described load AM access module, described four gate-controlled switches K11, K12, K13, K14, its first end not charged common port COM internal with A, B, C three-phase alternating current phase line of device and device respectively is connected, and its second end links together, and is connected with external load together with the zero line N of device；In described load switching inside modules, described three gate-controlled switches K1, K2, K3, its first end is connected with A, B, C three-phase alternating current phase line of device respectively, its second end the first end with described high-speed switch S1, S2, S3 respectively is connected, and second end of described high-speed switch S1, S2, S3 is all connected with the zero line N of device respectively.
Described three current transformers by measure current analog signal input intelligent controller current detecting unit, after filtering with signal conversion process after, obtain instantaneous value and the real-time phase of three-phase inlet wire current；Described voltage sensor by measure voltage analog signal input intelligent controller voltage detection unit, after filtering with signal condition after, obtain instantaneous value and the real-time phase of three-phase primary voltage；The signal that described synchronous detection unit detects according to voltage detection unit, calculates the zero crossing moment of three-phase voltage；Described CPU is according to the detection data of described current detecting unit and voltage detection unit, calculate the active power of current three-phase load, reactive power, power factor and three-phase imbalance angle value, and record inside described memory element, carry out decision-making according to the degree of unbalancedness situation of current three-phase load simultaneously, determine described load AM access module and the action scheme of described load switching module；Described communication unit 0 carries out RS485 communication with described communication unit 1 and described communication unit 2, the information such as the voltage over zero moment that the action scheme described CPU finally determined and described synchronous detection unit calculate send described communication unit 1 and described communication unit 2 to, the switch motion information that the communication unit 2 of the communication unit 1 and described load switching module that simultaneously receive described load AM access module feeds back；The signal generating unit 0 of described load AM access module carries out signal processing all in accordance with the action scheme received by described communication unit 1 and voltage over zero time information respectively, send correct on-off model, output is to described driver element 0, produce the driving pulse being suitable for gate-controlled switch, drive described four gate-controlled switches K11, K12, K13, K14；The signal generating unit 1 of described load switching module carries out signal processing according to the action scheme received by described communication unit 2 and voltage over zero time information, send correct on-off model, export to described driver element 01 and described driver element 02 respectively, described driver element 01 produces the driving pulse being suitable for gate-controlled switch, drive described three gate-controlled switches K1, K2, K3, described driver element 02 produces the driving pulse being suitable for high-speed switch, drives described three high-speed switches S1, S2, S3.
As optional embodiment of the present utility model: described controllable switch element is magnetic latching relay, and it is little that magnetic latching relay has volume, it is suitable for PCB and installs；Low in energy consumption, load capacity is strong；Safe and reliable, service life, the feature such as length, can reduce energy loss during load switching, it is ensured that the service life in whole loop.
As optional embodiment of the present utility model: described high-speed switch element is silicon controlled module, described silicon controlled module is made up of the controllable silicon of two reverse parallel connections, controllable silicon reaction is fast, it is swift in motion, triggering burst length during conducting is accurately controlled Millisecond, therefore can realize the load switching time and control within 10 milliseconds.
As optional embodiment of the present utility model: described high-speed switch element is IGBT, IGBT is that full-control type voltage drives semiconductor switch, it turns on and off and all can control, driving power is little, saturation pressure reduces, can work at still higher frequencies, therefore the control accuracy of load switching process is higher.
Relative to prior art, this utility model has the advantages that
1) this device can monitor the electric current of electrical network three-phase load, magnitude of voltage in real time, calculates and store the instantaneous value of three-phase load unbalance degree.
2) when load unbalanced degree is beyond the requirement of standard, device can control the switching of switch by intelligent controller, automatic switchover single-phase load accesses the phase line of power system, load unbalanced degree is made to reduce, three-phase load tends to balance, thus reduce line loss and the transformer loss that three characteristics of the middle term imbalance is brought, reach the purpose of saving energy and decreasing loss.
3) in handoff procedure, the dead electricity time of single-phase load was determined by the switching time switched, (according to GB/T30137-2013 within caning be controlled in 10 milliseconds, Voltage Drop within 10 milliseconds is not considered as voltage termination), do not affect the normal use of general household electrical appliance, it can be considered that load switching process is without power-off.
4) in the phase line handoff procedure of high-speed switch, the dash current to load is zero.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the three-phase load unbalance adjusting apparatus of this utility model preferred embodiment.
Detailed description of the invention
As shown in Figure 1, the three-phase load unbalance adjusting apparatus of the present embodiment includes three Current Transmits 1, CT2, CT3, voltage sensor PT, intelligent controller MC, two loads AM access module Load1, Load2, and load switching module LSwitch, the internal structure of described load AM access module Load1, Load2 is identical.Described intelligent controller MC includes CPU, current detecting unit, voltage detection unit, synchronous detection unit, memory element and communication unit 0；Said two load AM access module Load1, Load2 the most all include driver element 0, signal generating unit 0, communication unit 1, and four magnetic latching relays K11, K12, K13, K14；Described load switching module LSwitch includes driver element 01, driver element 02, signal generating unit 1, communication unit 2, three magnetic latching relays K1, K2, K3, and three groups of silicon controlled modules S1, S2, S3, described three groups of silicon controlled modules S1, S2, S3 are respectively by the controllable silicon composition of two reverse parallel connections.
Described three Current Transmits 1, CT2, CT3 are installed on A, B, C three-phase alternating current end of incoming cables of device, and output signal is connected with the current detecting unit of described intelligent controller MC；The input of described voltage sensor PT is from A, B, C three-phase alternating current end of incoming cables introducing, and output signal is connected with the voltage detection unit of described intelligent controller MC；Inside said two load AM access module Load1, Load2, described four magnetic latching relays K11, K12, K13, K14, its first end not charged common port COM internal with A, B, C three-phase alternating current phase line of device and device respectively is connected, its second end links together, and is connected with external load together with the zero line N of device；Inside described load switching module LSwitch, described three magnetic latching relays K1, K2, K3, its first end is connected with A, B, C three-phase alternating current phase line of device respectively, its second end the first end with described three groups of silicon controlled modules S1, S2, S3 respectively is connected, and second end of described three groups of silicon controlled modules S1, S2, S3 is all connected with the zero line N of device respectively.
Described communication unit 0 carries out RS485 communication with described communication unit 1, described communication unit 2 respectively, completes the mutual of information and instruction.Described signal generating unit 0 sends on-off model, exports to described driver element 0, produces the driving pulse being suitable for magnetic latching relay, drive described four magnetic latching relays K11, K12, K13, K14；Described signal generating unit 1 sends on-off model, output is to described driver element 01 and described driver element 02, described driver element 01 produces the driving pulse being suitable for magnetic latching relay, drive described three magnetic latching relays K1, K2, K3, described driver element 02 produces the driving pulse being suitable for silicon controlled module, drives described three silicon controlled modules S1, S2, S3.
The operation principle of the present embodiment is as follows: the current analog signal measured is inputted the current detecting unit of intelligent controller MC by three Current Transmits 1, CT2, CT3, after filtering with signal conversion process after, obtain instantaneous value and the real-time phase of A, B, C three-phase inlet wire current；Described voltage sensor PT by measure voltage analog signal input intelligent controller MC voltage detection unit, after filtering with signal condition after, obtain instantaneous value and the real-time phase of three-phase primary voltage；The signal that described synchronous detection unit detects according to voltage detection unit, calculates the zero crossing moment of three-phase voltage；Described CPU, according to the detection data of described current detecting unit and voltage detection unit, calculates the active power of current three-phase load, reactive power, power factor and three-phase imbalance angle value, and records inside described memory element.The three-phase imbalance angle value of the CPU real-time judge current memory cell of intelligent controller MC, if the overproof requirement of this value, then carry out decision-making according to the degree of unbalancedness situation of current three-phase load, determine load AM access module Load1, Load2 and the action scheme of load switching module LSwitch, and send action command；Communication unit 0 carries out RS485 communication with communication unit 1 and communication unit 2, the information such as the voltage over zero moment that action command CPU sent and synchronous detection unit calculate send communication unit 1 and communication unit 2 to, the switch motion information that the communication unit 2 of the communication unit 1 and load switching module that simultaneously receive load AM access module Load1, Load2 feeds back.
If the load of Load1 is connected in A phase, i.e. the driver element 0 of Load1, create the driving pulse of internal K11, be allowed to close.When A phase load is heavier, B phase load is relatively light, and three-phase imbalance angle value is above standard requirement, and CPU sends instruction: the A phase of load AM access module Load1 is accessed load switching to B phase.The signal generating unit 0 of Load1 carries out signal processing according to the instruction received by communication unit 1 and voltage over zero time information, send correct on-off model, export to the driver element 0 of Load1, produce the driving pulse of internal K14, it is allowed to close, the signal generating unit 1 of load switching module LSwitch carries out signal processing according to the instruction received by communication unit 2 and voltage over zero time information, send correct on-off model, export to driver element 01 and driver element 02 respectively, driver element 01 produces K1, the driving pulse of K2, it is allowed to close, driver element 02 produces the driving pulse of S1, it is allowed to turn on, now, the load that accesses of Load1 is powered by the A phase line of Load1 and the A phase line of LSwitch simultaneously；Then, the driver element 0 of Load1 stops the driving pulse of the internal K11 of output, is allowed to disconnect, and the load that accesses of Load1 is only powered by the A phase line of LSwitch；It follows that the driver element 02 of LSwitch stops sending the triggering pulse of silicon controlled module S1, after being spaced 1 ac cycle, while S1 turns off, driver element 02 sends the triggering pulse of silicon controlled module S2, makes S2 turn on, and now the load that accesses of Load1 is only powered by the B phase line of LSwitch；S1 turn off S2 conducting transit time be 1/3 ac cycle, the about 7ms time, be significantly less than the response time of load, it can be considered that load does not has power-off during this；It follows that the driver element 0 of Load1 exports the driving pulse of internal K12, it is allowed to close；Now, the load that accesses of Load1 is powered by the B phase line of Load1 and the B phase line of LSwitch simultaneously, postpones 3 ac cycles, after circuit stability, the driver element 02 of LSwitch stops sending the triggering pulse of S2, makes S2 turn off, and now the load that accesses of Load1 is only powered by the B phase line of Load1；Postpone 1 ac cycle again, the driver element 0 of Load1 stops sending the driving pulse of K14, is allowed to disconnect, and the driver element 01 of LSwitch stops sending the driving pulse of K1, K2, being allowed to disconnect, now the load that accesses of Load1 completes the overall process being switched to B phase from A phase.
If the load of Load2 is connected in B phase, i.e. the driver element 0 of Load2, create the driving pulse of internal K12, be allowed to close.When B phase load is heavier, C phase load is relatively light, and three-phase imbalance angle value is above standard requirement, and CPU sends instruction: the B phase of load AM access module Load2 is accessed load switching to C phase.The signal generating unit 0 of Load2 carries out signal processing according to the instruction received by communication unit 1 and voltage over zero time information, send correct on-off model, export to the driver element 0 of Load2, produce the driving pulse of internal K14, it is allowed to close, the signal generating unit 1 of load switching module LSwitch carries out signal processing according to the instruction received by communication unit 2 and voltage over zero time information, send correct on-off model, export to driver element 01 and driver element 02 respectively, driver element 01 produces K2, the driving pulse of K3, it is allowed to close, driver element 02 produces the driving pulse of S2, it is allowed to turn on, now, the load that accesses of Load2 is powered by the B phase line of Load2 and the B phase line of LSwitch simultaneously；Then, the driver element 0 of Load2 stops the driving pulse of the internal K12 of output, is allowed to disconnect, and the load that accesses of Load2 is only powered by the B phase line of LSwitch；It follows that the driver element 02 of LSwitch stops sending the triggering pulse of silicon controlled module S2, after being spaced 1 ac cycle, while S2 turns off, driver element 02 sends the triggering pulse of silicon controlled module S3, makes S3 turn on, and now the load that accesses of Load2 is only powered by the C phase line of LSwitch；S2 turn off S3 conducting transit time be 1/3 ac cycle, the about 7ms time, be significantly less than the response time of load, it can be considered that load does not has power-off during this；It follows that the driver element 0 of Load2 exports the driving pulse of internal K13, it is allowed to close；Now, the load that accesses of Load2 is powered by the C phase line of Load2 and the C phase line of LSwitch simultaneously, postpones 3 ac cycles, after circuit stability, the driver element 02 of LSwitch stops sending the triggering pulse of S3, makes S3 turn off, and now the load that accesses of Load2 is only powered by the C phase line of Load2；Postpone 1 ac cycle again, the driver element 0 of Load2 stops sending the driving pulse of K14, is allowed to disconnect, and the driver element 01 of LSwitch stops sending the driving pulse of K1, K2, being allowed to disconnect, now the load that accesses of Load2 completes the overall process being switched to C phase from B phase.
When load unbalanced degree is beyond the requirement of standard, device can control the switching of switch by intelligent controller, and automatic switchover single-phase load accesses the phase line of power system, makes load unbalanced degree reduce, and three-phase load tends to balance.In handoff procedure, the dead electricity time of single-phase load was determined by the switching time switched, (according to GB/T30137-2013 within caning be controlled in 10 milliseconds, Voltage Drop within 10 milliseconds is not considered as voltage termination), do not affect the normal use of general household electrical appliance, it can be considered that load switching process is without power-off.In low voltage electric network, it is adjusted electrical network three-phase imbalance being a kind of effective manner with low cost and direct by three-phase load unbalance adjusting apparatus, there is the highest feasibility and higher economic benefit.
Claims (7)
1. a three-phase load unbalance adjusting apparatus, including three current transformers, voltage sensor, intelligent controller, load switching module and two or more load AM access module, the internal structure of said two above load AM access module is identical；Described three current transformers are installed on A, B, C three-phase alternating current end of incoming cables of device, measure three-phase alternating current inlet wire current；The input of described voltage sensor, from A, B, C three-phase alternating current end of incoming cables introducing, measures three-phase alternating current primary voltage；Described intelligent controller is made up of CPU, current detecting unit, voltage detection unit, synchronous detection unit, memory element and communication unit 0；The internal structure of described load AM access module is identical, respectively by driver element 0, signal generating unit 0, communication unit 1 and four gate-controlled switch K11, K12, K13, K14 compositions；Described load switching module is made up of driver element 01, driver element 02, signal generating unit 1, communication unit 2, three gate-controlled switches K1, K2, K3 and three high-speed switches S1, S2, S3；Inside described load AM access module, first end of described four gate-controlled switches K11, K12, K13, K14 not charged common port COM internal with A, B, C three-phase alternating current phase line of device and device respectively is connected, second end of described four gate-controlled switches K11, K12, K13, K14 links together, and is connected with external load together with the zero line N of device；In described load switching inside modules, first end of described three gate-controlled switches K1, K2, K3 is connected with A, B, C three-phase alternating current phase line of device respectively, second end of described three gate-controlled switches K1, K2, K3 the first end with described high-speed switch S1, S2, S3 respectively is connected, and second end of described high-speed switch S1, S2, S3 is all connected with the zero line N of device respectively.
Three-phase load unbalance adjusting apparatus the most according to claim 1, it is characterised in that: described load AM access module is two.
Three-phase load unbalance adjusting apparatus the most according to claim 1, it is characterised in that: the communication modes between described communication unit 0, described communication unit 1 and described communication unit 2 is RS485 communication.
Three-phase load unbalance adjusting apparatus the most according to claim 1, it is characterised in that: the triggering pulse of a high-speed switch stops, and the triggering pulse to another high-speed switch sends, and required time interval is 1 ac cycle.
Three-phase load unbalance adjusting apparatus the most according to claim 1, it is characterised in that: described gate-controlled switch is magnetic latching relay.
Three-phase load unbalance adjusting apparatus the most according to claim 1, it is characterised in that: described high-speed switch is IGBT.
Three-phase load unbalance adjusting apparatus the most according to claim 1, it is characterised in that: described high-speed switch is the silicon controlled module of the controllable silicon composition of two reverse parallel connections.
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| CN201620379347.6U CN205583706U (en) | 2016-05-02 | 2016-05-02 | Three -phase unbalanced load adjusting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720595A (en) * | 2016-05-02 | 2016-06-29 | 广州开能电气实业有限公司 | Three-phase load unbalance adjustment apparatus |
| CN111044893A (en) * | 2019-12-12 | 2020-04-21 | 云南电网有限责任公司临沧供电局 | System and method for measuring load response time of phase change switch |
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2016
- 2016-05-02 CN CN201620379347.6U patent/CN205583706U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720595A (en) * | 2016-05-02 | 2016-06-29 | 广州开能电气实业有限公司 | Three-phase load unbalance adjustment apparatus |
| CN105720595B (en) * | 2016-05-02 | 2018-07-13 | 广州开能电气实业有限公司 | A kind of three-phase load unbalance adjusting apparatus |
| CN111044893A (en) * | 2019-12-12 | 2020-04-21 | 云南电网有限责任公司临沧供电局 | System and method for measuring load response time of phase change switch |
| CN111044893B (en) * | 2019-12-12 | 2020-11-13 | 云南电网有限责任公司临沧供电局 | System and method for measuring load response time of phase change switch |
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