CN108233393A - T-shaped three level static of one kind is idle generating system and method - Google Patents
T-shaped three level static of one kind is idle generating system and method Download PDFInfo
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- CN108233393A CN108233393A CN201810108508.1A CN201810108508A CN108233393A CN 108233393 A CN108233393 A CN 108233393A CN 201810108508 A CN201810108508 A CN 201810108508A CN 108233393 A CN108233393 A CN 108233393A
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- 230000003068 static effect Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005070 sampling Methods 0.000 claims abstract description 44
- 238000002955 isolation Methods 0.000 claims abstract description 25
- 238000012544 monitoring process Methods 0.000 claims abstract description 14
- 230000035939 shock Effects 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000000819 phase cycle Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims description 2
- 239000000284 extract Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in 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
- 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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Abstract
The present invention relates to one kind quickly and effectively dynamic passive compensation is carried out for fluctuating load,It is effectively improved the idle generating system of T-shaped three level static of power quality and method,It is big to solve reactive-load compensation generating means output current ripple in the prior art,The problem of power consumption is big,T-shaped three level static of one kind is idle generating system and method,Including MCU control unit,Address bit location,Light-coupled isolation module,Protection module,485 telecommunication units,A/D sampling modules,Provide a kind of stillness wattless occurrence apparatus of T-shaped three level,Acquire power grid power distribution information in real time by MCU,And power grid power distribution information calculate and extracts reactive current therein,Equipment goes out the reactive current in the opposite current canceling power down net of electric network reactive-load electric current by PWM adjustment inversions,The realtime power factor of power grid is made to reach 1,Device is real-time,Small power consumption,It is small to compensate current ripples,It can remote monitoring,The power quality of power grid can be greatly improved.
Description
Technical field
The present invention relates to electric network reactive compensation fields, are quickly and effectively moved for fluctuating load more particularly, to one kind
State reactive-load compensation is effectively improved the idle generating system of T-shaped three level static of power quality and method.
Background technology
In In the distribution system of low voltage, the power supply of frequent long-distance cable, load it is relatively low or without when the power supply
The problems such as system often in capacitive, causes system voltage excessively high, and power factor is low, and in perception, make system when overloaded
Brownout, power factor (PF) is also relatively low, and on the other hand with the increase of nonlinear-load in power supply-distribution system, harmonic wave largely injects
Electric power system；And fast-changing load is more and more, conventional Electric capacity compensation device can not be applicable in, and static reacance fills
Put and can be described as STATCOM, which can provide capacitive reactive power and provide inductive reactive power, can effective systems stabilisation voltage,
The power factor of raising system improves three-phase imbalance etc., so as to effectively reduce grid loss, improves power quality, ensures
Electric power netting safe running, the state type reactive-load compensation generating means of traditional two level, output current ripple is big, and power consumption is big, not
Make to be applicable in power grid at this stage again, so proposing current state-of-the-art T-shaped three level statics reactive-load compensation sending device.
Invention content
Reactive-load compensation generating means output current ripple is big in the prior art for the present invention mainly solution, and power consumption is big to ask
Topic provides a kind of small power consumption, compensation the current ripples small idle generating system of T-shaped three level static and method.
A kind of T-shaped idle generating system of three level statics, including MCU control unit, address bit location, light-coupled isolation mould
Block, protection module, 485 telecommunication units, A/D sampling modules, A/D converting units, the A/D sampling modules are adopted including voltage
Sample unit, system power sampling unit, branch current sampling unit, DC voltage sampling unit, IGBT temperature sampling unit, institute
State A/D sampling units, voltage sampling unit, system power sampling unit, branch current sampling unit, DC voltage sampling list
Member, IGBT temperature sampling unit are connected respectively with A/D converting units, and the A/D converting units are connected with MCU control unit, ground
Location bit location, 485 telecommunication units, light-coupled isolation module, protection module are connected respectively with MCU control unit, address bit list
Member reads the address fed back on toggle switch when equipment powers on every time, into row address bit assignment, passes through equipment
Address bit, in the case of distinguishing multiple devices parallel running, the address of every equipment, 485 remote communication modules pass through isolation
485 module of type, is isolated the signal of communication of MCU, while 485 communications, using differential signal, transmission range is up to
More than 1.5km, acquisition module collection voltages, system power, branch current, DC voltage, IGBT temperature data are turned by A/D
It changes the mold block and completes digital-to-analogue conversion.
As a preferred embodiment, the light-coupled isolation module includes normal shock transformer unit, IGBT driving units, optocoupler
Isolated location, the normal shock transformer unit, IGBT driving units, light-coupled isolation unit are sequentially connected, the MCU control unit
It is connected with IGBT units, normal shock transformer unit generates the voltage of+15V and the voltage of -8V that IGBT drivings need, and passes through optocoupler
The drive signal that MCU control unit is sent out is isolated with power grid for isolation module, and light-coupled isolation unit output terminal passes through one
Push-pull circuit is connected with IGBT gate leves.
As a preferred embodiment, the protection module includes DC voltage protection location, current protection unit, power grid phase
Sequence protection location, IGBT protection locations, the DC voltage protection location, current protection unit, power grid phase sequence unit,
IGBT protection locations are connected respectively with MCU control unit, and protection module includes hardware protection and software protection, and hardware protection passes through
The input value of equipment voltage and current is compared in real time with our threshold values of hardware protection, once equipment overcurrent or overvoltage,
Just the various output signals of equipment are ended, equipment are not allowed to have any switch motion, software protection by adopting in real time
Sample value and software threshold value are compared, once more than given threshold, equipment enters guard mode and does not send any switching signal.
As a preferred embodiment, it further includes and is provided with monitoring unit, MCU control unit, monitoring unit are sequentially connected, prison
Control the data of unit monitors acquisition module acquisition.
As a preferred embodiment, a kind of T-shaped idle method for generation of three level statics, includes the following steps：
S1. acquisition module, which acquires electric network data and passes through A/D modular converters, completes analog-to-digital conversion；
The data that S2.MCU acquires acquisition module and converts are handled, and calculate output adjustment, and pass through IGBT driving units
Export PWM wave；
S3. data information is uploaded to by remote monitoring end by the port on MCU in real time.
As a preferred embodiment, S1 includes the following steps：
S11. A/D acquisition modules collection voltages, system power, branch current, DC voltage, IGBT temperature data；
S12. by A/D acquisition modules, the voltage and current of distribution is acquired in real time, and is counted by the voltage and current of distribution
Calculate the size of its reactive current；
S13. digital-to-analogue conversion is completed by A/D converting units and sends data to MCU control unit.
As a preferred embodiment, S2 includes the following steps：
S21. the address fed back on toggle switch is read when equipment powers on every time, into row address bit assignment, is led to
Cross device address position, in the case of distinguishing multiple devices parallel running, the address of every equipment；
S22. MCU receives acquisition module acquisition and transformed data and carries out data processing to it；
S23. the voltage of+15V and the voltage of -8V that IGBT drivings need are generated by normal shock transformer, passes through light-coupled isolation mould
The drive signal that MCU is sent out is isolated with power grid for block；
S24. MCU calculates output adjustment, sends modulation and is output to IGBT drive module IGBT to be driven to export PWM wave.
As a preferred embodiment, S3 the specific steps are：
S31. based on modbus communication protocols, carried out data transmission by 485 isolating chips, use differential signal transmission.
Therefore, it is an advantage of the invention that：The present invention provides a kind of stillness wattless occurrence apparatus of T-shaped three level, pass through
MCU acquires power grid power distribution information in real time, and power grid power distribution information calculate and extracts reactive current therein, and equipment passes through
PWM adjustment inversions go out reactive current in the opposite current canceling power down net of electric network reactive-load electric current, make the realtime power of power grid because
Number reaches 1, device is real-time, small power consumption, compensation current ripples are small, can remote monitoring, the electric energy of power grid can be greatly improved
Quality.
Description of the drawings
Attached drawing 1 is a kind of structure frame figure of system in the present invention；
1. 3. light-coupled isolation unit of normal shock transformer unit 2.IGBT driving units
4. 5.485 telecommunication unit of address bit location, 6. light-coupled isolation module
7. 8. current protection unit of DC voltage protection location, 9. power grid phase sequence unit
10. 11. voltage sampling unit of A/D converting units, 12. system power sampling unit
13. 14. DC voltage sampling unit of branch current sampling unit
15. 16. monitoring unit of IGBT temperature sampling unit, 17. IGBT protection locations
18. 19. power grid phase sequence unit of protection module, 20. MCU control unit.
Specific embodiment
A kind of T-shaped idle generating system of three level statics of the present embodiment, MCU control unit 20 as shown in Figure 1, address bit list
Member 4, light-coupled isolation module 6, protection module 18,485 telecommunication units 5, A/D sampling modules 9, A/D converting units 10, it is described
A/D sampling modules include voltage sampling unit 11, system power sampling unit 12, branch current sampling unit 13, DC voltage
Sampling unit 14, IGBT temperature sampling unit 15, the A/D sampling units, voltage sampling unit, system power sampling unit,
Branch current sampling unit, DC voltage sampling unit, IGBT temperature sampling unit are connected respectively with A/D converting units, described
A/D converting units are connected with MCU control unit, address bit location, 485 telecommunication units, light-coupled isolation module, protection module
It is connected respectively with MCU control unit, address bit location reads feeding back on toggle switch when equipment powers on every time
Address, into row address bit assignment, pass through device address position, in the case of distinguishing multiple devices parallel running, every equipment
Address, 485 remote communication modules are isolated the signal of communication of MCU by 485 module of isolated form, while 485 communications are adopted
It is differential signal, transmission range is up to more than 1.5km, acquisition module collection voltages, system power, branch current, straight
Galvanic electricity pressure, IGBT temperature data complete digital-to-analogue conversion by A/D modular converters.
Protection module includes DC voltage protection location 7, current protection unit 8, power grid phase sequence unit 19, IGBT and protects
Protect unit 17, DC voltage protection location, current protection unit, power grid phase sequence unit, IGBT protection locations respectively with MCU
Control unit is connected, and protection module includes hardware protection and software protection, the input that hardware protection passes through equipment voltage and current
Value is compared in real time with our threshold values of hardware protection, once equipment overcurrent or overvoltage, just believe the various outputs of equipment
Number ended, equipment is not allowed to have any switch motion, software protection is compared by real-time sampled value and software threshold value
Compared with, once more than given threshold, equipment enters guard mode and does not send any switching signal, further includes and be provided with monitoring unit
16, MCU control unit, monitoring unit are sequentially connected, the data of monitoring unit monitoring acquisition module acquisition.
Light-coupled isolation module includes normal shock transformer unit 1, IGBT driving units 2, light-coupled isolation unit 3, normal shock transformation
Device unit, IGBT driving units, light-coupled isolation unit are sequentially connected, and MCU control unit is connected with IGBT units, normal shock transformation
Device unit generates the voltage of+15V and the voltage of -8V that IGBT drivings need, by light-coupled isolation module, to MCU control unit
The drive signal sent out is isolated with power grid, and light-coupled isolation unit output terminal passes through a push-pull circuit and IGBT gate leve phases
Even.
A kind of T-shaped idle method for generation of three level statics, includes the following steps：
S1. acquisition module, which acquires electric network data and passes through A/D modular converters, completes analog-to-digital conversion；
The data that S2.MCU acquires acquisition module and converts are handled, and calculate output adjustment, and pass through IGBT driving units
Export PWM wave；
S3. data information is uploaded to by remote monitoring end by the port on MCU in real time.
S1 includes the following steps：
S11. A/D acquisition modules collection voltages, system power, branch current, DC voltage, IGBT temperature data；
S12. by A/D acquisition modules, the voltage and current of distribution is acquired in real time, and is counted by the voltage and current of distribution
Calculate the size of its reactive current；
S13. digital-to-analogue conversion is completed by A/D converting units and sends data to MCU control unit.
S2 includes the following steps：
S21. the address fed back on toggle switch is read when equipment powers on every time, into row address bit assignment, is led to
Cross device address position, in the case of distinguishing multiple devices parallel running, the address of every equipment；
S22. MCU receives acquisition module acquisition and transformed data and carries out data processing to it；
S23. the voltage of+15V and the voltage of -8V that IGBT drivings need are generated by normal shock transformer, passes through light-coupled isolation mould
The drive signal that MCU is sent out is isolated with power grid for block；
S24. MCU control unit calculates output adjustment, sends modulation and is output to IGBT driving units IGBT to be driven to export PWM
Wave.
S3 includes the following steps：
S31. based on modbus communication protocols, carried out data transmission by 485 telecommunication units, differential signal is used to pass
It is defeated.
Specific embodiment described herein is only an example for the spirit of the invention.Technology belonging to the present invention is led
The technical staff in domain can do various modifications or additions to described specific embodiment or replace in a similar way
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Although MCU control unit is used more herein, address bit location, light-coupled isolation module, protection module, 485
The terms such as telecommunication unit, but it does not preclude the possibility of using other terms.The use of these items is only for more square
Just the essence of the present invention is described and explained；Being construed as any one of the additional limitations is disagreed with spirit of the present invention
The back of the body.
Claims (8)
1. a kind of T-shaped idle generating system of three level statics, including MCU control unit（20）, address bit location（4）, optocoupler every
From module（6）, protection module（18）, 485 telecommunication units（5）, A/D sampling modules（9）, A/D converting units（10）, it is described
A/D sampling modules include voltage sampling unit（11）, system power sampling unit（12）, branch current sampling unit（13）, it is straight
Flow voltage sampling unit（14）, IGBT temperature sampling unit（15）, the A/D sampling units, voltage sampling unit, system power
Sampling unit, branch current sampling unit, DC voltage sampling unit, IGBT temperature sampling unit respectively with A/D converting units
It is connected, the A/D converting units are connected with MCU control unit, address bit location, 485 telecommunication units, light-coupled isolation mould
Block, protection module are connected respectively with MCU control unit.
2. the T-shaped idle generating system of three level statics of one kind according to claim 1, it is characterized in that the light-coupled isolation mould
Block includes normal shock transformer unit（1）, IGBT driving units（2）, light-coupled isolation unit（3）, the normal shock transformer unit,
IGBT driving units, light-coupled isolation unit are sequentially connected, and the MCU control unit is connected with IGBT units.
3. the T-shaped idle generating system of three level statics of one kind according to claim 1, it is characterized in that the protection module packet
Include DC voltage protection location（7）, current protection unit（8）, power grid phase sequence unit（19）, IGBT protection locations（17）,
The DC voltage protection location, current protection unit, power grid phase sequence unit, IGBT protection locations control respectively with MCU
Unit is connected.
4. the T-shaped idle generating system of three level statics of one kind according to claim 1-3, is provided with it is characterized in that further including
Monitoring unit（16）, MCU control unit, monitoring unit are sequentially connected.
5. a kind of T-shaped idle method for generation of three level statics, using the system in claim any one of 1-4, it is characterized in that packet
Include following steps：
S1. acquisition module, which acquires electric network data and passes through A/D converting units, completes analog-to-digital conversion；
The data that S2.MCU acquires acquisition module and converts are handled, and calculate output modulation, and pass through IGBT driving units
Export PWM wave；
S3. data information is uploaded to by remote monitoring end by the port on MCU in real time.
6. the T-shaped idle method for generation of three level statics of one kind according to claim 5, it is characterized in that S1 includes following step
Suddenly：
S11. A/D acquisition modules collection voltages, system power, branch current, DC voltage, IGBT temperature data；
S12. by A/D acquisition modules, the voltage and current of distribution is acquired in real time, and is counted by the voltage and current of distribution
Calculate the size of its reactive current；
S13. digital-to-analogue conversion is completed by A/D converting units and sends data to MCU control unit.
7. the T-shaped idle method for generation of three level statics of one kind according to claim 5, it is characterized in that S2 includes following step
Suddenly：
S21. the address fed back on toggle switch is read when equipment powers on every time, into row address bit assignment, is led to
Cross device address position, in the case of distinguishing multiple devices parallel running, the address of every equipment；
S22. MCU receives acquisition module acquisition and transformed data and carries out data processing to it；
S23. the voltage of+15V and the voltage of -8V that IGBT drivings need are generated by normal shock transformer, passes through light-coupled isolation mould
The drive signal that MCU is sent out is isolated with power grid for block；
S24. MCU calculates output modulation, sends modulation and is output to IGBT drive module IGBT to be driven to export PWM wave.
8. the T-shaped idle method for generation of three level statics of one kind according to claim 5, it is characterized in that S3 the specific steps are：
S31. based on modbus communication protocols, carried out data transmission by 485 isolating chips, use differential signal transmission.
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| CN101282043A (en) * | 2008-04-30 | 2008-10-08 | 青岛盘古电气有限公司 | Novel electric power filter |
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Application publication date: 20180629 |