CN109378716A - A kind of anti-explosion reactive compensation device - Google Patents
A kind of anti-explosion reactive compensation device Download PDFInfo
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- CN109378716A CN109378716A CN201811473362.7A CN201811473362A CN109378716A CN 109378716 A CN109378716 A CN 109378716A CN 201811473362 A CN201811473362 A CN 201811473362A CN 109378716 A CN109378716 A CN 109378716A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
-
- 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
- Y02E40/30—Reactive power compensation
Abstract
This application involves mine flameproof and intrinsic safety type reactive-load compensation equipment fields, especially a kind of anti-explosion reactive compensation device, including being arranged in the intracorporal transformer of explosion-proof shell, reactor, power cell, main control unit, water cooling heat exchanger, water-cooling system, the transformer is attached by the high-explosive switch feeder line end in parallel with 10kV three-phase line side bus, it include 12 power cells on every circuitry phase, each power cell is directly accessed 10kV power grid through reactor again after cascading by two IGBT modules, and the transformer is connected by contactor with the reactor.Its device can quickly follow operating load to change and change, increase power factor, and Runing e conomy indicator is good, reduce line loss, provide reliable technical guarantee for safety of coal mines high efficiency power;Suitable for containing methane mixed gas, the underground coal mine with explosion danger can in extremely rapid succession provide capacitive or lagging reactive power to the power supply grid of exchange 50Hz, voltage rating 10kV.
Description
Technical field
This application involves mine flameproof and intrinsic safety type reactive-load compensation equipment field, especially a kind of explosion-proof reactive compensation
Device.
Background technique
With modern mine fast development, down-hole mechanical degree is constantly promoted, and heavy-duty motor is largely used and supplied
Electric line extends with production, necessarily recycles a large amount of reactive powers between various inductive loads and ground power grid power supply, makes
Decline at underground power supply used quality.In addition the non-linear devices such as power electronic equipment remove consumption nothing in the extensive application of underground coal mine
Outside function power, a large amount of harmonic waves are also generated, there are serious power quality problems, have influenced coal mining enterprise and have normally produced.
In April, 2006 National Development and Reform Committee, office of national energy leading group, under five ministries and commissions such as State Statistics Bureau joint
It has sent out " about the notice for printing and distributing thousand industry energy conservation action embodiments ", wherein national coal industry is classified as key object,
In July, 2007 National Development and Reform Committee, State Environmental Protection Administration issued and explicitly pointed out in " notice of coal industry energy-saving and emission-reduction opinion "
" underground coal mine preferably uses dynamic passive compensation and local reactive power compensation, and mine average power factor must not be lower than 0.9 ".
However in present colliery system, when working face installed capacity increases substantially with the raising that exploiting field produces, by
Too long in power supply capacity and route extension, big heaped capacity mesohigh motor is concentrated use in, and causes a large amount of idle function in system
Rate increases.Such case is extremely prominent in the highest coal working face power supply system of powerful device concentration degree, in electricity consumption height
Peak phase voltage reduces, and power factor is very low, high-power exploiting field equipment starting difficulty.Therefore, underground mine use reactive compensation is carried out
Technical research and popularization and application, for ensureing production, energy-saving having very important significance.It the implementation of the technology and pushes away
Extensively, good Social benefit and economic benefit not only is formed in this mine, product can be also played to the energy-saving of coal in China industry
Pole effect.
That there is also power factors is low for existing coal mine high voltage supply system, harmonic content is high, voltage fluctuation is big, voltage three-phase
The realistic problems such as imbalance, in conjunction with coal mine there is put more, wide, wire length, plant capacity is big, load fluctuation is big the features such as.
Apply for content
The application one of to solve above-mentioned technical problem used by technical solution be: a kind of anti-explosion reactive compensation device, including
It is arranged in the intracorporal transformer of explosion-proof shell, reactor, power cell, main control unit, water cooling heat exchanger, water-cooling system, the change
Depressor is attached by the high-explosive switch feeder line end in parallel with 10kV three-phase line side bus, includes 12 institutes on every circuitry phase
Power cell is stated, each power cell is directly accessed 10kV power grid, system through reactor again after cascading by two IGBT modules
Required system busbar current signal is derived from the breaker end of incoming cables in high-explosive switch, when system-down or because failure is out of service
When, using breaker as reliable disjunction device, power grid is quickly exited completely to ensure, while will not influence the confession of load below
Electricity, a busbar current transformer are mounted on 10kV system busbar, and the transformer is connected by contactor with the reactor,
The each output port of the main control unit, input port pass through signal line and transformer, reactor, power cell, master respectively
Unit, water cooling heat exchanger, the signal input port of water-cooling system, signal output port is controlled to be connected.
The voltage rating of the IGBT module is 1700V.
Its cavity is divided into three parts by two partitions by the explosion-proof shell, and the transformer, reactor are located at explosion-proof shell
In left side cavity body, the main control unit, water wind heat exchanger, water-cooling system are located in the right-side cavity body of explosion-proof casing, the power
Unit is arranged in the middle chamber of explosion-proof casing, and the power cell is put in is spelled by being fixed on the intracorporal insulation profile of explosion-proof shell
On the Insulating frame of dress, there is ventilation slot between Insulating frame and power cell, not only ensure that the requirement of electric property, but also be convenient for space
Interior ventilation.
The water-cooling system uses water-water type plate heat exchanger.
The main control unit uses fpga chip.
The power cell uses chain H bridge cascade of power units structure, the H bridge that the cascade structure is made of IGBT
Circuits cascading structure, the ac converter voltage-phase and amplitude of output can be controlled flexibly, to realize compensating reactive power or active power filtering
Function, the chain H bridge cascade of power units structure is connected in series by multiple two level H-bridges circuits, reaches voltage superposition
Purpose.
The structure arrangement of power cell is the key content of the application, and the present apparatus contains 36 power cells altogether, often
Phase 12, wherein there are also water routes and circuit to need to consider, it is contemplated that underground space is limited, because transhipment and installation equipment are all
There is very big requirement to outer dimension, therefore how to arrange the difficult point and again when power cell becomes equipment design research and development
Point, finally comprehensively considers, and in conjunction with the outer dimension of reactor and water-cooling system, takes the mode of double layout, module and module
Between use back-to-back arrangement, 12 power cells of every phase, before 6, behind 6, back-to-back arrange, maximum magnitude
Save space, while the intermediate space for reserving water main, front and back two sides is travelled by water and connecting copper bar, makes whole device shape
More rationally, internal space layout is compact, water route and the more convenient beauty of connecting copper bar cabling, and become present apparatus design one is big
Bright spot.
In 10kV system in application, the power cell for multiple two level that are often linked;With traditional multiplex current transformer skill
Art scheme is compared, and multiplex connection transformer is omitted, not only reduces occupied area, reduces installation cost, and avoid
Device overvoltage and overcurrent caused by remanent magnetism and saturation nonlinearity in multiplex contravariant transformer energizing loop.It is in access
When system is disturbed, link circuit can be controlled to provide voltage support effect preferably with split-phase.
Moreover, the switching frequency that power device can also be reduced using chain structure, substantially reduces switching loss.
The reactor uses water cooling reactor, increases radiating efficiency.
Beneficial effect possessed by the application is that the device can quickly follow operating load to change and change, and improves function
Rate factor, Runing e conomy indicator is good, reduces line loss, provides reliable technical guarantee for safety of coal mines high efficiency power;It is suitable
For containing methane mixed gas, the underground coal mine with explosion danger, to the power supply electricity of exchange 50Hz, voltage rating 10kV
Net can in extremely rapid succession provide capacitive or lagging reactive power, realize dynamic passive compensation, big especially suitable for underground coal mine
Power motor is concentrated use in, the power grid end of impact load Fraquent start, ensures that power supply system and electrical equipment are stable, efficiently
Operation.The power factor for improving power grid, improves the utilization rate of power supply system;Stablize network voltage;Inhibit harmonic wave, purify power grid,
Enhance the security reliability of power supply system.
In terms of social benefit:
1, energy-saving and emission-reduction: after underground power supply system develops 10kV high-pressure reactive compensation, Power supply system is greatly reduced and exists
The high-pressure side 10kV compensates reactive power present in operation of power networks, improves the power factor of system, reduces reactive power
Loss, has saved the energy, while can play the effect for inhibiting harmonic wave again.
2, optimize power supply grid: improving underground coal mine power supply environment, capacitive reactive power needed for compensating load improves power grid
Power factor eliminates voltage flicker and voltage fluctuation, inhibits harmonic pollution, purifies power grid;Network optimization design and equipment are matched
Setting will play an important role.
Detailed description of the invention
Fig. 1 is the schematic view of the front view of the application.
Fig. 2 is the side structure schematic view of the application.
Fig. 3 is the overlooking structure diagram of the application.
Fig. 4 is the location arrangements schematic diagram of each power cell of the application.
Fig. 5 is schematic view of the mounting position of this anti-explosion reactive compensation device in network system.
Fig. 6 is the voltage bridge circuit schematic diagram of system.
Fig. 7 is the working principle of the present apparatus.
In figure, 1, transformer;2, reactor;3, main control unit;4, water cooling heat exchanger;5, water-cooling system;6, power list
Member;7, busbar current transformer;8, IGBT module;9, Insulating frame;10, ventilation slot: 12, water cooling tube;13, connecting copper bar.
Specific embodiment
In order to clarify the technical characteristics of the invention, below by specific embodiment, and its attached drawing is combined, to this Shen
It please be described in detail.
As shown in figs. 1-7, a kind of anti-explosion reactive compensation device, including be arranged in the intracorporal transformer of explosion-proof shell, reactance
Device, power cell, main control unit, water cooling heat exchanger, water-cooling system, the transformer by with 10kV three-phase line side bus simultaneously
The high-explosive switch feeder line end of connection is attached, and includes 12 power cells on every circuitry phase, and each power cell passes through two
It is directly accessed 10kV power grid through reactor again after a IGBT module cascade, system busbar current signal needed for system is derived from high quick-fried
Breaker end of incoming cables in switch, when system-down or because of failure it is out of service when, using breaker as reliable disjunction device, come
Power grid is quickly exited in guarantee completely, while will not influence the power supply of load below, and a busbar current transformer is mounted on 10kV system
It unites on bus, a busbar voltage three-phase mutual inductor is mounted in explosion-proof casing, and the transformer passes through contactor and the reactance
Device is connected, and each output port of the main control unit, input port pass through signal line and transformer, reactor, power respectively
Unit, main control unit, water cooling heat exchanger, the signal input port of water-cooling system, signal output port are connected;Chip is on the market
General chip.When connecting it with all parts, staff carries out voluntarily corresponding connect according to the function of the pin of each chip
It connects, connection type belongs to the conventional means of those skilled in the art, and innovation is not present.
The voltage rating of the IGBT module is 1700V.
Its cavity is divided into three parts by two partitions by the explosion-proof shell, and the transformer, reactor are located at explosion-proof shell
In left side cavity body, the main control unit, water wind heat exchanger, water-cooling system are located in the right-side cavity body of explosion-proof casing, the power
Unit is arranged in the middle chamber of explosion-proof casing, and the power cell is put in is spelled by being fixed on the intracorporal insulation profile of explosion-proof shell
On the Insulating frame of dress, there is ventilation slot between Insulating frame and power cell, not only ensure that the requirement of electric property, but also be convenient for space
Interior ventilation.
The water-cooling system uses water-water type plate heat exchanger.
The main control unit uses fpga chip.When work: the present apparatus passes through charging resistor first and fills to DC bus capacitor
Electricity, after DC capacitor voltage reaches predetermined value, short circuit contactor closure, charging process terminates, and device is started to work, use
Chip is existing fpga chip on the market, is directly bought.
Main control unit uses fpga chip, and by the voltage of acquisition system bus bar side, current signal, being calculated needs to mend
The harmonic current or reactive current repaid;IGBT driving signal needed for last controller generates power cell, controls power cell
, the compensation electric current of opposite in phase equal with load harmonic current or reactive current amplitude is generated, filters out harmonic wave or benefit to realize
Repay idle purpose.
The power cell uses chain H bridge cascade of power units structure, the H bridge that the cascade structure is made of IGBT
Circuits cascading structure, the ac converter voltage-phase and amplitude of output can be controlled flexibly, to realize compensating reactive power or active power filtering
Function, the chain H bridge cascade of power units structure is connected in series by multiple two level H-bridges circuits, reaches voltage superposition
Purpose.
The structure arrangement of power cell is the key content of the application, and the present apparatus contains 36 power cells altogether, often
Phase 12, wherein there are also water routes and circuit to need to consider, it is contemplated that underground space is limited, because transhipment and installation equipment are all
There is very big requirement to outer dimension, therefore how to arrange the difficult point and again when power cell becomes equipment design research and development
Point, finally comprehensively considers, and in conjunction with the outer dimension of reactor and water-cooling system, takes the mode of double layout, module and module
Between use back-to-back arrangement, 12 power cells of every phase, before 6, behind 6, back-to-back arrange, maximum magnitude
Save space, while the intermediate space for reserving water main, front and back two sides is travelled by water and connecting copper bar, makes whole device shape
More rationally, internal space layout is compact, water route and the more convenient beauty of connecting copper bar cabling, and become present apparatus design one is big
Bright spot.
In 10kV system in application, the power cell for multiple two level that are often linked;With traditional multiplex current transformer skill
Art scheme is compared, and multiplex connection transformer is omitted, not only reduces occupied area, reduces installation cost, and avoid
Device overvoltage and overcurrent caused by remanent magnetism and saturation nonlinearity in multiplex contravariant transformer energizing loop.It is in access
When system is disturbed, link circuit can be controlled to provide voltage support effect preferably with split-phase.
Moreover, the switching frequency that power device can also be reduced using chain structure, substantially reduces switching loss.
The reactor uses water cooling reactor, increases radiating efficiency.
In actual production construction, the actual conditions of underground power supply system are comprehensively considered, the electricity according to existing for power supply system
Energy quality problems, design applies this compensation device in exploiting field compensation point or working section sub station, to improve the electric energy of power supply system
Quality.
Such as: using XXX underground power supply system as research object, by taking underground western part electric substation in the system as an example: such as
Shown in Fig. 5
It is installation site, power supply line's 2014102#, 2014107# master switch that this compensation device, which selects western electric substation's distributor point,
Rear side installs two sets of WJL-6MVar/10kV mine flameproof and intrinsic safeties between J1 and J2 high-explosive switch and shifting change into compensation point
Type cascade STATCOM, 2 covering devices can carry out concentration reactive compensation to all loads of western electric substation;In maintenance or event
When barrier, J1 and J2 high-explosive switch need to only be disconnected, so that it may compensation device and bus are kept completely separate, will not influence power supply buses just
Often power supply.
The main control unit of the present apparatus uses 16 high-precision AD sampling A/D chips, and sampling precision is high, makes the meter to reactive power
More accurate, dynamically track compensation performance is more superior.Using large-scale F PGA chip phase-shifting carrier wave multilevel space vector
PWM control strategy constitutes module and controls hardware platform, and circuit is simple, strong antijamming capability, high reliablity.
Master controller is installed in the cavity on the left of cabinet, is made of several major parts such as master control cabinet and touch screen.
Man-machine interface uses 7 cun of true color screens of 800x480 TFT.Equipment control and parameter setting are operated by keyboard.
Voltage stabilization effect under System Reactive Power impact conditions.
Entire underground power supply system is by ground to underground central substation, overall length 1800m, voltage 10kV, by central power transformation
Institute to western electric substation, overall length 5500m, voltage 10kV, power factor is 0.6 before compensating, and power factor is 0.95 after compensation, west
The total load of electric substation of portion is 11969KW, apparent energy 8378KW, then active power is 5027KW.Wherein 103 fully mechanized coal faces supply
Electric system is double circuit power supply, and a set of compensation device is installed in every circuit, therefore is calculated with a wherein circuit (wherein active
Power presses mean allocation).
1. line loss calculates
Entire line loss is:
R1=ƿL1/S1=0.0185×1800/240=0.14Ω;
R2=ƿL2/S2=0.0185×5500/120=0.84Ω;
Power supply line's active loss before compensating:
P1=3I12R × 10-3(KW)==172KW
Power supply line's active loss after compensation:
P2=3I22R × 10-3(KW)==69KW
Compensation front and back active loss is reduced: △ P=103KW;
Annual loss depletion is few: △ W=△ P × T=103KW × 18 whens/day × 280 day=519120kWh
Then 1038240kWh is lacked in entire 10kV power supply buses annual loss depletion.
2. improving voltage, inhibit voltage fluctuation
From ground transformer substation to central substation: the length of L1-240mm2 cable, L1=1.8km, the Ω of resistance R1=0.14, reactance
XL1=0.16Ω;
Central substation is to western electric substation: the length of L2-120mm2 cable, L2=5.5km, resistance R2=0.84 Ω, reactance XL2
=0.418Ω;
Power factor is 0.6 before compensating, active power 2514KW
Route droop loss before then compensating:
89V
351V
Total droop loss are as follows:440V
Line drop loses after compensation:
48V
246V
Total droop loss are as follows:294V system voltage significantly improves.
According to system design principle and live use condition, the interface of this compensation system and main current supply circuit is in 10kV
Side.In the design, following access way is devised:
The present apparatus is integrated, and in 10kV side bus parallel connection high-explosive switch device, high-explosive switch feeder line end access device is
System busbar current signal needed for system is derived from the breaker end of incoming cables in high-explosive switch.When system-down or because failure exits fortune
When row, using breaker as reliable disjunction device, power grid is quickly exited completely to ensure, while will not influence the confession of load below
Electricity.Program device volume is small, flexible for installation, it is determined as the design scheme of subsequent design.
The present apparatus uses the Detecting Reactive Current mode based on instantaneous reactive power theory, need to detect Mu Xian electricity Liu ﹑ bus
Voltage.Since active power, the reactive power etc. in traditional theory are defined in the sense that average value basis or vector,
The case where when they are only applicable to voltage, electric current is sine wave.And the concept in instantaneous reactive power theory, it is all instantaneous
It is defined on the basis of value.The case where it is applicable not only to sine wave, is also applied for non-sinusoidal waveform and any transient process, can be with
Regard the popularization and extension of traditional theory as.Method based on instantaneous reactive power theory, can be with when only detecting reactive current
Completely no-delay obtains testing result.When detecting harmonic current, because of the composition of harmonic wave in detected object electric current and using filter
The difference of wave device has different delays, but a no more than power cycle, has good real-time.
Current direct control current instantaneous value is compared with the instruction of instantaneous reactive reference current, and comparison result controls function
The switch state of rate unit.Current direct control be divided into stagnant ring compare, constant frequency triangle wave and space voltage vector etc. it is several
Kind control mode.Current direct control is relatively indirectly controlled and is had many good qualities, and is in particular in:
1) system have quick transient response: due to the introducing of instantaneous feedback, control system to DC voltage with exchange side
Voltage ripple of power network is reacted rapidly, and output current following reference value is kept;
2) system stability is high: the current regulator of inductance is first-order system, unconditional stability;
3) it can inhibit adverse effect caused by negative phase-sequence: in the presence of electrical network negative phase-sequence voltage, because referenced reactive current is first to use abc-
Dq0 transforms to instantaneous Iq, then changes three-phase transient current by dq0-abc inversion, and referenced reactive current is actually three at this time
The average value of phase reactive current.Therefore, the reactive current for exporting three-phase current is symmetrical, and inflow DC side pulsation of current is small, voltage
Also relatively more steady.
Present apparatus Principles of Reactive Compensation: voltage bridge circuit is used, circuit structure diagram is as shown in fig. 6, its physical circuit figure
For the prior art, provides understand application scheme convenient for auditor herein.
DC voltage is converted into and to exchange side power grid same by the on-off of power semiconductor switches when the present apparatus works
The output voltage of frequency, a similar voltage-type power cell, only it exchanges side and exports the not instead of passive load connect,
Power grid.Therefore, when only considering fundamental frequency, the present apparatus can equally be considered as one that amplitude and phase can control
With the alternating-current voltage source of power grid same frequency.It is connected on power grid by AC reactor, and idle property and size are by adjusting
Electric current realizes that this internal circuit configuration figure is known range, understands convenient for auditor.
The phase that the working principle of the present apparatus can be worked with one phase equivalent circuit figure shown in Fig. 7 with electric current lead and lag
Spirogram illustrates.
Phasor: network voltage
Phasor: present apparatus output AC voltage
Phasor: the voltage on connection reactance X
: the electric current that the present apparatus is absorbed from power grid
Change the voltage of present apparatus exchange outlet sideAmplitude and its relative toPhase, so that it may change connection reactance
On voltage also just control the present apparatus to control the phase and amplitude that the present apparatus absorbs electric current from power grid and absorb idle function
The property and size of rate inhibit harmonic wave, improve the effect of grid power quality to reach increase power factor.
The device can quickly follow operating load to change and change, increase power factor, and Runing e conomy indicator is good, reduce
Line loss provides reliable technical guarantee for safety of coal mines high efficiency power;Suitable for containing methane mixed gas, have quick-fried
Dangerous underground coal mine is fried, to the power supply grid of exchange 50Hz, voltage rating 10kV, can in extremely rapid succession provide capacitive or sense
Property reactive power, realize dynamic passive compensation, be concentrated use in especially suitable for underground coal mine heavy-duty motor, impact load frequency
The power grid end of numerous starting ensures power supply system and electrical equipment stabilization, efficient operation.The power factor of power grid is improved, is improved
The utilization rate of power supply system;Stablize network voltage;Inhibit harmonic wave, purifies power grid, enhance the security reliability of power supply system;It can
Continuous, smooth, the dynamic, quick reactive power compensation from perception to capacitive are provided, the response time is fast, can quickly track negative
Lotus variation;After device puts into operation, stablize line end voltage stabilization, voltage change amplitude is smaller, and line current is by original
130 ~ 150A variation range drops to 70~40A, and stability greatly reinforces, and ensure that working face electrical equipment normally starts and works
Normally;After device puts into operation, line harmonic content is greatly reduced, especially 3 times, 5 times and 7 subharmonic, power supply system electric energy
Quality substantially improves, and extends the service life of electrical equipment;Power supply line's power factor significantly improves, and is raised to 0.97 by 0.6,
Electric energy is greatly saved, good economic benefit is brought to coal mine;Economic analysis reduces line loss, can save electricity every year
The every degree electricity of 1038240kWh is by 0.8 yuan of calculating: 830592 yuan of 1038240x0.8 ≈;After additional equipment, it can suitably lower transformer
Capacity configuration and cable specification, save money;After additional equipment, the power quality of underground electric network is improved, equipment is improved
Service life reduces personal expenditures and equipment maintenance cost;In terms of social benefit: energy-saving and emission-reduction: in underground power supply system
After developing 10kV high-pressure reactive compensation, Power supply system is greatly reduced and is compensated present in operation of power networks in the high-pressure side 10kV
Reactive power improves the power factor of system, reduces the loss of reactive power, has saved the energy, while can play suppression again
The effect of harmonic wave processed;Optimize power supply grid: improving underground coal mine power supply environment, capacitive reactive power needed for compensating load improves electricity
The power factor of net eliminates voltage flicker and voltage fluctuation, inhibits harmonic pollution, purifies power grid;Network optimization is designed and set
Standby configuration will play an important role.
Above-mentioned specific embodiment cannot function as the limitation to the application protection scope, for the technology people of the art
For member, any alternate modification or transformation made to the application embodiment are all fallen in the protection scope of the application.
Place is not described in detail by the application, is the well-known technique of those skilled in the art of the present technique.
Claims (7)
1. a kind of anti-explosion reactive compensation device, it is characterised in that: including being arranged in the intracorporal transformer of explosion-proof shell, reactor, function
Rate unit, main control unit, water cooling heat exchanger, water-cooling system, the transformer pass through in parallel with 10kV three-phase line side bus
High-explosive switch feeder line end is attached, and includes 12 power cells on every circuitry phase, and each power cell passes through two
It is directly accessed 10kV power grid through reactor again after IGBT module cascade, the transformer passes through contactor and the reactor phase
Even, each output port of the main control unit, input port pass through respectively signal line and transformer, reactor, power cell,
Main control unit, water cooling heat exchanger, the signal input port of water-cooling system, signal output port are connected.
2. a kind of anti-explosion reactive compensation device according to claim 1, it is characterised in that: the specified electricity of the IGBT module
Pressure is 1700V.
3. a kind of anti-explosion reactive compensation device according to claim 1 or 2, it is characterised in that: the explosion-proof shell passes through two
Its cavity is divided into three parts by partition, and the transformer, reactor are located in explosion-proof shell left side cavity body, the main control unit,
Water wind heat exchanger, water-cooling system are located in the right-side cavity body of explosion-proof casing, and the centre of explosion-proof casing is arranged in the power cell
In cavity, the power cell is put on the Insulating frame by being fixed on the intracorporal insulation section assembling of explosion-proof shell, Insulating frame
There is ventilation slot between power cell.
4. a kind of anti-explosion reactive compensation device according to claim 3, it is characterised in that: the water-cooling system uses water-
The plate heat exchanger of water type.
5. a kind of anti-explosion reactive compensation device according to claim 1, it is characterised in that: the main control unit uses FPGA
Chip, the fpga chip are produced using XILINX producer, model PARTAN-XC3100E.
6. a kind of anti-explosion reactive compensation device according to claim 1, it is characterised in that: the power cell uses chain type
H bridge power unit cascade structure, the cascade structure cascade structure, the chain H bridge power list by the H-bridge circuit that IGBT is formed
First cascade structure is connected in series by multiple two level H-bridges circuits.
7. a kind of anti-explosion reactive compensation device according to claim 1, it is characterised in that: the reactor is using water cooling electricity
Anti- device.
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CN112821414A (en) * | 2021-01-07 | 2021-05-18 | 山东华天电气有限公司 | Mining water-cooling dynamic reactive compensation adjusting device and control method thereof |
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CN112821414A (en) * | 2021-01-07 | 2021-05-18 | 山东华天电气有限公司 | Mining water-cooling dynamic reactive compensation adjusting device and control method thereof |
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