CN103840461B - Steel plant's power distribution cabinet system harmonic protection method of outer end is arranged in protection cabinets - Google Patents
Steel plant's power distribution cabinet system harmonic protection method of outer end is arranged in protection cabinets Download PDFInfo
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- CN103840461B CN103840461B CN201310710922.7A CN201310710922A CN103840461B CN 103840461 B CN103840461 B CN 103840461B CN 201310710922 A CN201310710922 A CN 201310710922A CN 103840461 B CN103840461 B CN 103840461B
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 9
- 239000010959 steel Substances 0.000 title claims abstract description 9
- 230000001012 protector Effects 0.000 claims abstract description 53
- 239000003990 capacitor Substances 0.000 claims abstract description 42
- 238000001514 detection method Methods 0.000 claims description 30
- 230000005611 electricity Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000007257 malfunction Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 241001347978 Major minor Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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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
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The present invention provides steel plant's power distribution cabinet system harmonic protection methods that outer end is arranged in protection cabinets, use two harmonic protection cabinets, and centre has capacitor compensation cabinet and power distribution cabinet.The harmonic protection cabinet each all has main harmonic protector, subharmonic protector and Coordination module.Signal acquisition and inverter circuit are all had in each harmonic protection device.
Description
Technical field
The present invention relates to field of power distribution, steel plant's power distribution cabinet system harmonic wave that outer end is arranged in particularly for protection cabinets is protected
Maintaining method.
Background technique
The power distribution cabinet of influence in the distribution system of electric power due to to(for) power grid generates harmonic current, therefore generally requires
Harmonic protection device is set in distribution system.These protective devices can be modulated the harmonic current generated in distribution system
Inhibit.But the arrangement about the distribution system in some specific fields, it does not relate in the prior art.Due to having
Controller switching equipment arrangement situation in body field is changeable, and the configuration state of different equipment in systems changes, and all will
The harmonic modulation situation of entire distribution system is produced a very large impact.For example, the height that equipment requires current waveform is different,
The position of its access point should difference, and its correlation and harmonic protection device itself with harmonic protection device
On-position will all have an impact the harmonic performance of equipment and system.
Simultaneously as harmonic protection device generally requires the abnormal operating states such as charging, maintenance when application, this
A little states will all have an impact the harmonic modulation of entire distribution system.There is no specifically ask for this in the prior art
Topic is pointedly solved.
Summary of the invention
In view of the above-mentioned problems, the present invention proposes that the power distribution cabinet system harmonic protection side, steel plant of outer end is arranged in protection cabinets
Method proposes solution specific to the above problem in steel plant's field of power distribution.
The technical solution adopted by the present invention are as follows:
Steel plant's power distribution cabinet system harmonic protection method of outer end is arranged in protection cabinets, and the power distribution cabinet system includes mother
Line, the left end of bus are connected with the first transformer, and right end is connected with the second transformer, first transformer and the second transformer
Electric power is provided to bus, the power distribution cabinet system further includes left harmonic protection cabinet and right harmonic protection cabinet, physical location difference
The left end and right end of the power distribution cabinet system are set, and bus is connected with the first left electricity in turn on the right side of the first transformer
Capacitance compensating cabinet and the second left capacitor compensation cabinet, bus are connected with left harmonic protection cabinet on the right side of the second left capacitor compensation cabinet,
In, the left harmonic protection cabinet is connect by left waveform detection circuit with bus, and the left waveform detection circuit is for being worked as
The tie point of electricity waveform in preceding bus, the left waveform detection circuit and bus be located at described two left capacitor compensation cabinets with
The right side of bus tie point, the left harmonic protection cabinet also pass through left waveform modulated route and left outside portion's connection, the left side
Outside line is connect by air switch with bus, and the tie point of left outside line and bus is located at left waveform detection circuit and mother
On the left of the tie point of line, and it is located on the right side of described two left capacitor compensation cabinets and bus tie point；The left waveform modulated route
For exporting the modulation waveform for being used for bus harmonic filtration；Bus connects on the right side of the tie point of left waveform detection circuit and bus
It is connected to workshop light distribution cabinet, variable-frequency motor power distribution cabinet is connected on the right side of the workshop light distribution cabinet, in the variable-frequency electric
It is connected with PLC power distribution cabinet on the right side of machine power distribution cabinet, is connected with the first right capacitor compensation cabinet and the in turn on the right side of the PLC power distribution cabinet
Two right capacitor compensation cabinets are connected with right harmonic protection cabinet on the right side of described two right capacitor compensation cabinets, wherein the right harmonic wave is protected
Shield cabinet is connect by right waveform detection circuit with bus, and the right waveform detection circuit is used to obtain the electricity wave in current bus
The tie point of shape, the right waveform detection circuit and bus is located at a left side for described two right capacitor compensation cabinets and bus tie point
Side, the right harmonic protection cabinet are also connect by right waveform modulated route with right outside line, and the right outside line passes through sky
Air cock is connect with bus, and the tie point of right outside line and bus is located at right waveform detection circuit and the tie point of bus is right
Side, and be located on the left of described two right capacitor compensation cabinets and bus tie point；The right waveform modulated route is used for for exporting
The modulation waveform of bus harmonic filtration；Described method includes following steps:
1, bus current data are acquired in real time by waveform detection circuit, analyze harmonic current；
2, reverse phase harmonic current is generated by waveform modulated route, eliminates mains by harmonics.
Valuably, wherein the harmonic protection cabinet is identical, include modulation Coordination module, main harmonic protector and
Subharmonic protector, wherein main harmonic protector adjusts bus waveform for generating reverse phase harmonic current under normal conditions
System；Subharmonic protector be used for when main harmonic protector can not work normally generate reverse phase harmonic current, to bus waveform into
Row modulation；Modulate Coordination module for real-time monitoring main harmonic protector working condition and main harmonic protector can not be normal
Subharmonic protector is enabled when work；Wherein, it when modulation Coordination module detects main harmonic protector cisco unity malfunction, adjusts
Coordination module processed is gradually reduced the waveform modulated provided by main harmonic protector, and correspondingly gradually increases by subharmonic protector
The waveform modulated of offer, to guarantee the steady of switching；When main harmonic protector needs to return to normal operating conditions, modulation association
Mode transfer block is gradually reduced the waveform modulated provided by subharmonic protector, and correspondingly gradually increases and provided by main harmonic protector
Waveform modulated, thus guarantee switching it is steady.
Valuably, wherein the main harmonic protector and subharmonic protector include protector signal acquisition route, humorous
Wave monitoring modular, processing module, drive module, IGBT inverter circuit module, charging capacitor module, capacitor charging resistance, reactance
Device and protector modulate route, wherein Detecting Power Harmonicies module is used for the system of exchanging by protector signal acquisition route and coordinates mould
Bus waveform given by block is monitored, processor module be used for Detecting Power Harmonicies module monitors to signal carry out processing point
Analysis；Drive module is used to receive the control signal of processor module and drives IGBT inverter circuit module, IGBT inverter circuit mould
Block is used to modulate the modulation waveform that Coordination module output is used for bus by reactor and protector modulation lines road direction；The modulation
Coordination module has the waveform modulated route connecting with bus and waveform detection circuit；The charging capacitor module is for storing
It deposits electric energy and powers for the internal element of harmonic protection device, capacitor charging resistance is used to keep away in charging capacitor module charging
Exempt from the charging capacitor module by heavy current impact.
It should be noted that the term "left", "right" used in the present invention is not actual direction meaning, only scheme in instruction
Shown in various pieces relative positional relationship.
Through the above scheme, harmonic protection cabinet is placed on to the both ends of entire distribution system, convenient for the cloth of other power distribution cabinets
Installation and layout expansion are set, the safety of distribution system is improved；Due in a power distribution system by workshop light distribution cabinet, change
Frequency motor power distribution cabinet, PLC power distribution cabinet have all carried out reasonable setting, and harmonic protection device is suitably connected into power distribution system
System, so that each electrical equipment in whole system has all obtained good current waveform, the safety for avoiding PLC device etc. is hidden
Suffer from；Major-minor harmonic protection device has been used simultaneously, so that each harmonic protection cabinet has double shield, for example, charged, failing
Etc. under situations, can guarantee the inhibition and modulation to harmonic wave, improve the stability and reliability of system operation.
Detailed description of the invention
Fig. 1 is distribution system structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of harmonic protection of the invention；
Fig. 3 is the structural schematic diagram of the harmonic protection circuit of the harmonic protection in Fig. 2 of the invention.
Specific embodiment
Referring to Fig.1-3, the present invention is described in detail.
Steel plant's power distribution cabinet system harmonic protection method of outer end is arranged in protection cabinets, and the power distribution cabinet system includes bus
10, the left end of bus 10 is connected with the first transformer 1, and right end is connected with the second transformer 2, first transformer 1 and second
Transformer 2 provides electric power to bus 10, and the power distribution cabinet system further includes left harmonic protection cabinet 7 and right harmonic protection cabinet 8, object
Reason position is separately positioned on the left end and right end of the power distribution cabinet system, and bus successively connects on the right side of the first transformer 1
It is connected to the first left capacitor compensation cabinet 3 and the second left capacitor compensation cabinet 4, bus is connected on the right side of the second left capacitor compensation cabinet 4
Left harmonic protection cabinet 7, wherein the left harmonic protection cabinet 7 is connect by left waveform detection circuit 72 with bus, the left waveform
Detection circuit 72 is used to obtain the electricity waveform in current bus, and the left waveform detection circuit 72 and the tie point of bus are located at
The right side of described two left capacitor compensation cabinets 3,4 and bus tie point, the left harmonic protection cabinet 7 also pass through left waveform modulated line
Road 71 is connect with left outside line 73, and the left outside line 73 is connect by air switch with bus, left outside line 73 and
The tie point of bus is located at tie point left side of the left waveform detection circuit 72 with bus, and is located at described two left capacitor compensation cabinets
3,4 with bus tie point on the right side of；The left waveform modulated route 71 is used to export the modulation waveform for bus harmonic filtration；It is female
Line is connected with workshop light distribution cabinet on the right side of the tie point of left waveform detection circuit 72 and bus, and in the workshop, illumination is matched
It is connected with variable-frequency motor power distribution cabinet on the right side of electric cabinet, PLC power distribution cabinet is connected on the right side of the variable-frequency motor power distribution cabinet, described
It is connected with the first right capacitor compensation cabinet 5 and the second right capacitor compensation cabinet 6 on the right side of PLC power distribution cabinet in turn, described two right capacitors are mended
It repays cabinet 5,6 to connect with bus, is connected with right harmonic protection cabinet 8, the right wave on described two right 5,6 right sides of capacitor compensation cabinet
Shape detection circuit 82 is used to obtain the electricity waveform in current bus, the connection point of the right waveform detection circuit 82 and bus
In the left side of described two right capacitor compensation cabinets 3,4 and bus tie point, the right harmonic protection cabinet 8 also passes through right waveform modulated
Route 81 is connect with right outside line 83, and the right outside line 83 is connect by air switch with bus, right outside line 83
It is located at tie point right side of the right waveform detection circuit 82 with bus with the tie point of bus, and is located at described two right capacitance compensations
On the left of cabinet 3,4 and bus tie point；The right waveform modulated route 81 is used to export the modulation waveform for bus harmonic filtration；
Described method includes following steps:
1, bus current data are acquired by waveform detection circuit 72,82 in real time, analyze harmonic current；
2, reverse phase harmonic current is generated by waveform modulated route 71,81, eliminates mains by harmonics.
Valuably, wherein the harmonic protection cabinet 7,8 structures are identical, include modulation Coordination module 73, main harmonic protection
Device 74 and subharmonic protector 75, wherein main harmonic protector 74 for generating reverse phase harmonic current under normal conditions, to bus wave
Shape is modulated；Subharmonic protector 75 is used to generate reverse phase harmonic current when main harmonic protector 74 can not work normally,
Bus waveform is modulated；Coordination module 73 is modulated for the working condition of real-time monitoring main harmonic protector 74 and humorous in master
Subharmonic protector 75 is enabled when wave protector 74 can not work normally；Wherein, when modulation Coordination module 73 detects main harmonic
When 74 cisco unity malfunction of protector, modulation Coordination module 73 is gradually reduced the waveform modulated provided by main harmonic protector 74,
And the waveform modulated provided by subharmonic protector 75 is correspondingly be provided, to guarantee the steady of switching；When main harmonic is protected
When shield device 74 needs to return to normal operating conditions, modulation Coordination module 73 is gradually reduced the waveform provided by subharmonic protector 75
Modulation, and the waveform modulated provided by main harmonic protector 74 is correspondingly be provided, to guarantee the steady of switching.
Valuably, wherein the main harmonic protector 74 and subharmonic protector 75 are including protector signal acquisition line
Road 741, Detecting Power Harmonicies module 744, processing module 745, drive module 746, IGBT inverter circuit module 747, charging capacitor mould
Block 748, capacitor charging resistance 749, reactor 743 and protector modulate route 742, wherein Detecting Power Harmonicies module 744 is used for
It is monitored by bus waveform given by 741 pairs of modulation Coordination modules 73 of protector signal acquisition route, processor module
745 for carrying out processing analysis to the signal that Detecting Power Harmonicies module 744 monitors；Drive module 746 is for receiving processor die
The control signal of block 745 simultaneously drives IGBT inverter circuit module 747, and IGBT inverter circuit module 747 is used to pass through reactor 743
Modulation waveform of the route 742 to the modulation output of Coordination module 73 for bus is modulated with protector；The modulation Coordination module 73
With the waveform modulated route 71 being connect with bus and waveform detection circuit 72；The charging capacitor module 748 is for storing
It deposits electric energy and powers for the internal element of harmonic protection device 74,75, capacitor charging resistance 749 is used in the charging capacitor module
Avoid the charging capacitor module 748 by heavy current impact when 748 charging.
Claims (1)
1. steel plant's power distribution cabinet system harmonic protection method of outer end is arranged in protection cabinets, the power distribution cabinet system includes bus
(10), the left end of bus (10) is connected with the first transformer (1), and right end is connected with the second transformer (2), first transformer
(1) and the second transformer (2) is to bus (10) offer electric power, and the power distribution cabinet system further includes left harmonic protection cabinet (7) and the right side
Harmonic protection cabinet (8), physical location are separately positioned on the left end and right end of the power distribution cabinet system, and bus becomes first
It is connected with the first left capacitor compensation cabinet (3) and the second left capacitor compensation cabinet (4) on the right side of depressor (1) in turn, bus is on second left side
Left harmonic protection cabinet (7) is connected on the right side of capacitor compensation cabinet (4), wherein the left harmonic protection cabinet (7) is examined by left waveform
Slowdown monitoring circuit (72) is connect with bus, and the left waveform detection circuit (72) is used to obtain the electricity waveform in current bus, described
The tie point of left waveform detection circuit (72) and bus is located at the right side of described two left capacitor compensation cabinet (3,4) and bus tie point
Side, the left harmonic protection cabinet (7) are also connect by left waveform modulated route (71) with left outside line (73), the left outside portion
Route (73) is connect by air switch with bus, and the tie point of left outside line (73) and bus is located at left waveform detection circuit
(72) and on the left of the tie point of bus, and it is located on the right side of described two left capacitor compensation cabinets (3,4) and bus tie point；The left side
Waveform modulated route (71) is used to export the modulation waveform for bus harmonic filtration；Bus left waveform detection circuit (72) with
It is connected with workshop light distribution cabinet on the right side of the tie point of bus, is connected with variable-frequency motor on the right side of the workshop light distribution cabinet
Power distribution cabinet is connected with PLC power distribution cabinet on the right side of the variable-frequency motor power distribution cabinet, is connected in turn on the right side of the PLC power distribution cabinet
First right capacitor compensation cabinet (5) and the second right capacitor compensation cabinet (6), the connection on the right side of described two right capacitor compensation cabinets (5,6)
There is right harmonic protection cabinet (8), wherein the right harmonic protection cabinet (8) is connect by right waveform detection circuit (82) with bus, institute
Right waveform detection circuit (82) are stated for obtaining the electricity waveform in current bus, the right waveform detection circuit (82) and bus
Tie point be located at the left sides of described two right capacitor compensation cabinet (3,4) and bus tie point, the right harmonic protection cabinet (8) is also
It is connect by right waveform modulated route (81) with right outside line (83), the right outside line (83) passes through air switch and mother
The tie point of line connection, right outside line (83) and bus is located on the right side of the tie point of right waveform detection circuit (82) and bus,
And it is located on the left of described two right capacitor compensation cabinets (3,4) and bus tie point；The right waveform modulated route (81) is for defeated
It is used for the modulation waveform of bus harmonic filtration out；Described method includes following steps:
1) bus current data are acquired by left and right waveform detection circuit (72,82) in real time, analyze harmonic current；
2) reverse phase harmonic current is generated by left and right waveform modulated route (71,81), eliminates mains by harmonics；
Wherein, left and right harmonic protection cabinet (the 7,8) structure is identical, includes modulation Coordination module (73), main harmonic protector
(74) and subharmonic protector (75), wherein main harmonic protector (74) for generating reverse phase harmonic current under normal conditions, to mother
Line waveform is modulated；Subharmonic protector (75) is used to generate reverse phase when main harmonic protector (74) can not work normally humorous
Wave electric current is modulated bus waveform；Modulate the work that Coordination module (73) are used for real-time monitoring main harmonic protector (74)
State simultaneously enables subharmonic protector (75) when main harmonic protector (74) can not work normally；Wherein, when mould is coordinated in modulation
When block (73) detects main harmonic protector (74) cisco unity malfunction, modulation Coordination module (73) is gradually reduced to be protected by main harmonic
The waveform modulated that device (74) provide is protected, and the waveform modulated provided by subharmonic protector (75) is correspondingly be provided, thus
Guarantee the steady of switching；When main harmonic protector (74) needs to return to normal operating conditions, modulation Coordination module (73) is gradually
The waveform modulated provided by subharmonic protector (75) is provided, and is correspondingly gradually increased by main harmonic protector (74) offer
Waveform modulated, to guarantee the steady of switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310710922.7A CN103840461B (en) | 2013-12-16 | 2013-12-16 | Steel plant's power distribution cabinet system harmonic protection method of outer end is arranged in protection cabinets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310710922.7A CN103840461B (en) | 2013-12-16 | 2013-12-16 | Steel plant's power distribution cabinet system harmonic protection method of outer end is arranged in protection cabinets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103840461A CN103840461A (en) | 2014-06-04 |
| CN103840461B true CN103840461B (en) | 2019-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310710922.7A Expired - Fee Related CN103840461B (en) | 2013-12-16 | 2013-12-16 | Steel plant's power distribution cabinet system harmonic protection method of outer end is arranged in protection cabinets |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201435610Y (en) * | 2009-07-09 | 2010-03-31 | 上海艾帕电力电子有限公司 | Device for controlling power quality comprehensively |
| CN201498992U (en) * | 2009-09-28 | 2010-06-02 | 中国电力科学研究院 | Filter connection circuit for connecting buses |
| CN101989746A (en) * | 2010-11-10 | 2011-03-23 | 国网南自控股（杭州）有限公司 | On-line dynamic harmonic treatment device |
| CN103166222A (en) * | 2011-12-12 | 2013-06-19 | 永济新时速电机电器有限责任公司 | Filtering system |
| CN103368182A (en) * | 2013-08-08 | 2013-10-23 | 东南大学 | Modularized multi-machine parallel-connection large-power APF (active power filter) control system and realization method |
-
2013
- 2013-12-16 CN CN201310710922.7A patent/CN103840461B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201435610Y (en) * | 2009-07-09 | 2010-03-31 | 上海艾帕电力电子有限公司 | Device for controlling power quality comprehensively |
| CN201498992U (en) * | 2009-09-28 | 2010-06-02 | 中国电力科学研究院 | Filter connection circuit for connecting buses |
| CN101989746A (en) * | 2010-11-10 | 2011-03-23 | 国网南自控股（杭州）有限公司 | On-line dynamic harmonic treatment device |
| CN103166222A (en) * | 2011-12-12 | 2013-06-19 | 永济新时速电机电器有限责任公司 | Filtering system |
| CN103368182A (en) * | 2013-08-08 | 2013-10-23 | 东南大学 | Modularized multi-machine parallel-connection large-power APF (active power filter) control system and realization method |
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| CN103840461A (en) | 2014-06-04 |
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Granted publication date: 20190514 |