CN110460065A - Flameproof and intrinsically safe static reactive generator device and the implementation method of reactive compensation - Google Patents
Flameproof and intrinsically safe static reactive generator device and the implementation method of reactive compensation Download PDFInfo
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- CN110460065A CN110460065A CN201910767255.3A CN201910767255A CN110460065A CN 110460065 A CN110460065 A CN 110460065A CN 201910767255 A CN201910767255 A CN 201910767255A CN 110460065 A CN110460065 A CN 110460065A
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- 238000001914 filtration Methods 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims abstract description 7
- 238000004458 analytical method Methods 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 14
- 230000017525 heat dissipation Effects 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 230000008901 benefit Effects 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims description 2
- 230000002401 inhibitory effect Effects 0.000 claims 1
- 239000003245 coal Substances 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 239000000306 component Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
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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
- H02J3/01—Arrangements for reducing harmonics or ripples
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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
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
-
- 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
- Y02E40/40—Arrangements for reducing harmonics
Abstract
A kind of Flameproof and intrinsically safe static reactive generator device and reactive compensation implementation method, it is difficult can to solve underground coal mine remote power-feeding electric motor starting, the technical issues of underground coal mine power factor of electric network is relatively low, voltage fluctuation is big, harmonic wave big influence long range power quality.SVG control system, IGBT power cell, exchange isolation filter system including successively communication connection is arranged in explosion-proof type shell；SVG control system is detected, converted to system voltage, current signal, filtered and analysis processing, provides modulation wave signal and the location mode monitoring of SVG unit needs；The unit driving plate of IGBT power cell receives the master board command signal of SVG control system, is converted into the driving signal of driving IGBT；Exchange isolation filter system is single order low pass LC filter, filters out the harmonic wave near the PWM wave switching frequency of SVG equipment IGBT.Reactive compensation, filtering and energy-saving effect of the present invention are good, improve the power quality of underground power supply system, effectively extend low-voltage power supply apart from the problem of.
Description
Technical field
The present invention relates to reacance generator technical fields, and in particular to a kind of Flameproof and intrinsically safe static reactive generator dress
It sets and the implementation method of reactive compensation.
Background technique
With the development of mining mechanization, a large amount of high-power machinery is applied to coal industry, with supplying in recovery process
The increase of electrical distance and each mechanical equipment itself need the use of certain reactive power loss and a large amount of rectifier equipments, make
Underground coal mine power factor of electric network is relatively low, voltage fluctuation is big, harmonic wave becomes greatly the common fault of the major coal mine in the whole nation.
The relatively low power supply unit service ability that will use electric enterprise of power factor reduces, and the utilization rate of electrical equipment reduces,
Equipment investment increases.
Reactive power is big, and cable power supply distance is remote, causes system voltage loss to increase, be easy to cause voltage fluctuation, make electricity
Energy quality degradation, electrical equipment service life are severely impacted, and start the equipment of remote power-feeding can not normally.
Harmonic current is big, pollutes power supply grid, makes communication and metering system serious interference, cable and transformer insulated impact
Greatly, fever is serious.
Reasonable selection installation compensation device, increase power factor and improvement power grid, can accomplish to reduce to greatest extent
The loss of underground electric network is improved underground electric network quality, stablizes terminal voltage, the normal remote power-feeding operation of equipment.
Current mining reactive compensation and power quality controlling technology have following two pattern:
1, using passive device capacitor switching technology, compensating electric capacity has using contactor switching mode, referred to as mechanical switching
Reactive compensation also has using thuristor throw-in and throw-off, referred to as thyristor switchable capacitor (TSC)
2, current transformer control is carried out using active device IGBT and realizes reactive compensation and harmonic wave control technology, referred to as static nothing
Function generator technology and Active Power Filter Technology (APF) this kind of device technique and combine explosion proof applications technology, the product developed
It is mine flameproof and intrinsic safety type static reactive generator.It is current most advanced mining power quality controlling product or device.
Summary of the invention
A kind of Flameproof and intrinsically safe static reactive generator device proposed by the present invention and the implementation method of reactive compensation, can
It is difficult to solve underground coal mine remote power-feeding electric motor starting, underground coal mine power factor of electric network is relatively low, voltage fluctuation is big, and harmonic wave is big
The technical issues of influencing long range power quality.
To achieve the above object, the invention adopts the following technical scheme:
A kind of Flameproof and intrinsically safe static reactive generator device, including explosion-proof type shell, in explosion-proof type shell setting according to
SVG control system, IGBT power cell, the exchange isolation filter system of secondary communication connection；
Wherein, SVG control system detects system voltage, current signal, is converted, being filtered and analysis is handled, and provides
Modulation wave signal and the location mode monitoring that SVG unit needs；
The unit driving plate of IGBT power cell receives the master board command signal of SVG control system, is converted into driving
The driving signal of IGBT, while the monitoring of unit DC voltage and over-voltage being provided, IGBT short circuit, IGBT overheat protection function and passed back
To the master control system of SVG control system；
Exchange isolation filter system is single order low pass LC filter, and the PWM wave switching frequency for filtering out SVG equipment IGBT is attached
Close harmonic wave.
Further, the heat-radiating integrated mechanism of explosion-proof converter heat exchange is also set up on the explosion-proof type shell, it is described
The heat-radiating integrated mechanism of explosion-proof converter heat exchange includes heat-pipe radiator, heat exchanger and explosion-proof fan, and the heat pipe dissipates
Hot device, heat exchanger and explosion-proof fan are set on same air duct, and heat-pipe radiator is used for the heat dissipation of power device, heat exchange
Heat dissipation of the device for electrical devices other in addition to power device in explosion-proof chamber body, explosion-proof fan are heat-pipe radiator and heat exchange
Device provides cold wind.
Further, the SVG control system includes master board, display screen and operation panel；
RS485 communication is carried out between the display screen and master control borad, realization shows SVG system monitoring and operating status；
The operation panel is connect with display control board, by input control parameter, controls the start and stop and modification ginseng of SVG
Number.
On the other hand, invention additionally discloses a kind of Flameproof and intrinsically safe static reactive generator device reactive compensation realization sides
Method, comprising the following steps:
It by current transformer, real-time detection load current, and is calculated, is extracted in power network current by internal DSP
Idle and harmonic components, are then sent to internal IGBT by pwm signal, and control static reactive generator generates one and load
Idle and harmonic current is equal in magnitude, and contrary electric current is injected into power grid.
As shown from the above technical solution, static reactive generator device of the invention is Flameproof intrinsically safe, is had
The function of reactive compensation and active power filtering can control DC inversion to friendship by adjusting the switch of IGBT device in inverter bridge
The amplitude and phase of the voltage of stream, therefore, whole device are equivalent to a phase modulation power supply.The realization side of reactive compensation of the invention
Method by idle needed for detection system, can quickly issue it is equal in magnitude, opposite in phase idle, realize it is idle on the spot
Balance keeps the real-time High Power Factor operation of system.Apparatus of the present invention good, good wave filtering effect, energy conservation with reactive compensation effect
Effect is good, the features such as, improve the power quality of underground power supply system, effectively extend low-voltage power supply apart from the problem of.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the principle of the present invention figure；
Fig. 3 is the working principle of the static reactive generator of the invention using Direct Current Control；
Fig. 4 is power cell functional block diagram of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
As shown in Figure 1, the mine flameproof and intrinsic safety type static reactive generator of the embodiment of the present invention controls system by SVG
System, IGBT power cell, exchange isolation filter system, the heat-radiating integrated mechanism of explosion-proof converter heat exchange and explosion-proof casing are several
Part forms.
It is illustrated below for every part:
Control system
Wherein, control system is mainly made of master board, display screen and operation panel etc..
Master board is the core component of control system.The core devices of master board are made of DSP+FPGA, to system
Voltage, current signal are detected, are converted, being filtered and analysis handles and each phase element communicates etc., and providing SVG unit needs
Modulation wave signal and the location mode monitoring wanted.
RS485 communication is carried out between display screen and master control borad, realization shows SVG system monitoring and operating status.
Operation panel is connect with display control board, by input control parameter, controls the start and stop and modification parameter of SVG.
IGBT power cell
As shown in figure 4, IGBT power cell includes IGBT module, unit driving plate, DC support capacitor, surging capacitor.
SVG opens up benefit structure using 3 voltage-mode H-bridge inverter circuit unit star-like connections, and switching device IGBT, DC side uses dry
For formula thin-film capacitor as DC support capacitor, the high-frequency switch that each bridge arm parallel connection surging capacitor is used to that IGBT to be inhibited to generate is sharp
Peak.
Unit driving plate receive master board command signal, be converted into driving IGBT driving signal, forward voltage+15V,
Backward voltage -9V.The defencive functions such as the monitoring of unit DC voltage and over-voltage, IGBT short circuit, IGBT overtemperature are provided simultaneously and are passed back
To master control system.
Exchange isolation filter system
Exchange isolation filter system is single order low pass LC filter, by filter reactor, damping resistance and ac filter electricity
Hold composition.Its effect is the harmonic wave filtered out near the PWM wave switching frequency of SVG equipment IGBT.Filter reactor is connected in parallel on power grid
On, effect is to filter out high-frequency harmonic that may be present in electric current, while playing that the two voltage sources have connected with power grid by SVG
The effect come.
The heat-radiating integrated mechanism of explosion-proof converter heat exchange
Including heat-pipe radiator, heat exchanger and explosion-proof fan, heat-pipe radiator, heat exchanger and explosion-proof fan are set to
On same air duct, heat-pipe radiator is used for the heat dissipation of power device, heat exchanger in explosion-proof chamber body except power device with
The heat dissipation of outer other electrical devices, explosion-proof fan provide cold wind for heat-pipe radiator and heat exchanger.Heat exchanger includes axis stream
Blower, the use of axial flow blower promote the flowing of air in airtight cavity, and the balanced intracorporal temperature of explosion-proof type closed chamber makes
It obtains antiknock device radiating efficiency to greatly improve, and improves the use longevity of the electrical devices such as reactor, transformer, power capacitor
Life.
As shown in Fig. 2, the mine flameproof and intrinsic safety type static reactive generator of the embodiment of the present invention is by SVG and APF
Technological incorporation together, and is designed using blast resistance construction, to realize underground coal mine power system reactive power compensation.Specifically,
The embodiment of the present invention is calculated by current transformer, real-time detection load current by internal DSP, and power network current is extracted
In idle and harmonic components, internal IGBT is then sent to by pwm signal, control static reactive generator generate one and
Load that idle and harmonic current is equal in magnitude, contrary electric current is injected into power grid, reaches compensating reactive power and filtering purpose.
Working principle using the active power filtering type medium-voltage equipment of Direct Current Control is as shown in Figure 3.It can be obtained from figure
Formula (1), i.e. source current outIt is load currentWith compensation electric currentPhasor and.Assuming that load currentIn contain fundamental wave
Forward-order current (including fundamental positive sequence reactive currentAnd fundamental positive sequence active current), fundamental negative sequence currentAnd harmonic wave
Electric currentAs shown in formula (2).
To make source currentIn without containing fundamental positive sequence is idle and fundamental negative sequence current, then need to control equipment output electricity
StreamMeet formula (3).Just contain only that fundamental positive sequence is active and harmonic current in source current in this way, as shown in formula (4).
In summary, Flameproof and intrinsically safe static reactive generator device described in the present embodiment, including control system, master
A few part combinations such as circuit, host computer, operation keyboard, heat pipe self-cold radiating device, cooling blower and explosion-proof casing, which can be right
By compensation equipment reactive power tracing compensation, dynamic response performance is good, and efficient heat pipe self-cold radiating device is its internal IGBT etc.
High-power heating device provides good dissipating-heat environment, extends power device service life, guarantees safe and reliable operation.
The Flameproof and intrinsically safe static reactive generator device of the embodiment of the present invention product can be applied to underground coal mine tool
There is the environment of the explosion dangers such as gas, coal dust.Be able to solve underground coal mine mobile substation and export a large amount of load or burden without work, power because
Low, the energy wastes problem such as harmonic wave THD high of number.Underground Fan, transporter, feeder, water pump and impractical person vehicle etc. can be set
Standby reactive power is recompensed.
The embodiment of the present invention is in response speed, stable network voltage, reduction system loss, the raising instantaneous voltage limit, drop
Low ripple and compact etc. are many-sided to have superior performance, and voltage class 1140V, single machine compensation capacity is 500KVar, from
The capacity or inductive reactive power of dynamic real-time compensation system, dynamic response time are less than 10ms, and power factor can be improved to 98%
More than, and have the function of APF, it can effectively remove a variety of harmonic waves such as 5,7,11,13 of system.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (7)
1. a kind of Flameproof and intrinsically safe static reactive generator device, including explosion-proof type shell, it is characterised in that: explosion-proof type shell
It is interior that successively the SVG control system of communication connection, IGBT power cell, exchange isolation filter system are set；
Wherein, SVG control system detects system voltage, current signal, is converted, being filtered and analysis is handled, and it is mono- to provide SVG
Modulation wave signal and the location mode monitoring that member needs；
The unit driving plate of IGBT power cell receives the master board command signal of SVG control system, is converted into driving IGBT
Driving signal, while the monitoring of unit DC voltage and over-voltage being provided, IGBT short circuit, IGBT overheat protection function and are returned to
The master control system of SVG control system；
Exchange isolation filter system is single order low pass LC filter, near the PWM wave switching frequency for filtering out SVG equipment IGBT
Harmonic wave.
2. Flameproof and intrinsically safe static reactive generator device according to claim 1, it is characterised in that: the explosion-proof type
The heat-radiating integrated mechanism of explosion-proof converter heat exchange is also set up on shell, the explosion-proof converter heat exchange is heat-radiating integrated
Mechanism includes heat-pipe radiator, heat exchanger and explosion-proof fan, and the heat-pipe radiator, heat exchanger and explosion-proof fan are set to
On same air duct, heat-pipe radiator is used for the heat dissipation of power device, heat exchanger in explosion-proof chamber body except power device with
The heat dissipation of outer other electrical devices, explosion-proof fan provide cold wind for heat-pipe radiator and heat exchanger.
3. Flameproof and intrinsically safe static reactive generator device according to claim 2, it is characterised in that: the heat exchange
Device includes axial flow blower, and the use of axial flow blower promotes the flowing of air in airtight cavity, balanced explosion-proof type airtight cavity
Interior temperature.
4. Flameproof and intrinsically safe static reactive generator device according to claim 1, it is characterised in that: the SVG control
System processed includes master board, display screen and operation panel；
RS485 communication is carried out between the display screen and master control borad, realization shows SVG system monitoring and operating status；
The operation panel is connect with display control board, by input control parameter, controls the start and stop and modification parameter of SVG.
5. Flameproof and intrinsically safe static reactive generator device according to claim 1, it is characterised in that: the IGBT function
Rate unit includes IGBT module, unit driving plate, DC support capacitor, surging capacitor；
The SVG control system opens up benefit structure using three voltage-mode H-bridge inverter circuit unit star-like connections, and switching device is
IGBT, DC side use dry type film capacitor as DC support capacitor, and each bridge arm parallel connection surging capacitor is for inhibiting IGBT
The high-frequency switch spike of generation；
The unit driving plate of the IGBT power cell receives master board command signal, is converted into the driving letter of driving IGBT
Number, forward voltage+15V, backward voltage -9V；The monitoring of unit DC voltage and over-voltage, IGBT short circuit, IGBT overtemperature are provided simultaneously
Equal defencive functions are simultaneously returned to master control system.
6. Flameproof and intrinsically safe static reactive generator device according to claim 1, it is characterised in that: it is described exchange every
It is single order low pass LC filter, including filter reactor, damping resistance and ac filter capacitor from filtering system；
The filter reactor is connected in parallel on power grid, and effect is to filter out high-frequency harmonic that may be present in electric current, is played simultaneously
The effect that SVG and power grid the two voltage sources are connected.
7. a kind of Flameproof and intrinsically safe static reactive generator device reactive compensation implementation method, it is characterised in that: including following
Step:
It by current transformer, real-time detection load current, and is calculated, is extracted idle in power network current by internal DSP
And harmonic components, internal IGBT is then sent to by pwm signal, control static reactive generator generates one and loads idle
And harmonic current is equal in magnitude, contrary electric current is injected into power grid.
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| CN112134594A (en) * | 2020-09-09 | 2020-12-25 | 青岛鼎信通讯股份有限公司 | Communication method between SVGs |
| CN117743106A (en) * | 2024-02-19 | 2024-03-22 | 宁波长壁流体动力科技有限公司 | Safety detection method of explosion-proof intrinsic safety type keyboard and explosion-proof intrinsic safety type keyboard |
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| CN117743106A (en) * | 2024-02-19 | 2024-03-22 | 宁波长壁流体动力科技有限公司 | Safety detection method of explosion-proof intrinsic safety type keyboard and explosion-proof intrinsic safety type keyboard |
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