CN107294107A - railway power system low-voltage dynamic compensating device - Google Patents
railway power system low-voltage dynamic compensating device Download PDFInfo
- Publication number
- CN107294107A CN107294107A CN201610208131.8A CN201610208131A CN107294107A CN 107294107 A CN107294107 A CN 107294107A CN 201610208131 A CN201610208131 A CN 201610208131A CN 107294107 A CN107294107 A CN 107294107A
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- CN
- China
- Prior art keywords
- voltage
- low
- switching unit
- distribution system
- capacitor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- 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
The present invention relates to a kind of railway power system low-voltage dynamic compensating device, belong to power network Treatment process field.Including filtering compensation measurement and control instrument, low-voltage distribution system, idle compensating control and switching unit, three-phase voltage, three-phase current signal are passed to filtering compensation measurement and control instrument by low-voltage distribution system, idle compensating control is sent after comparison operation outputs signal to switching unit, and switching cell operation is to adjust the voltage and electric current of low-voltage distribution system.The present invention can adjust switching unit by reactive-load compensator, the series resonance frequency of adjustment circuit is allowed to the harmonic frequency being less than in system, reduce the interference of electric current, voltage distortion and mitigation to other electronic load normal works, so as to improve grid supply quality, system transformer and line loss are reduced.
Description
Technical field
The present invention relates to a kind of railway system electric power system low pressure dynamic compensating device, belong to power network Treatment process field.
Background technology
With industrial expansion, the harmonic wave and reactive-load compensation problem of railway power system are increasingly severe, and power network is influenceed increasingly severe by the nonlinear load of modern electronic equipment.In low-voltage distribution system, 3 times, 5 times, 7 subharmonic be the most serious, make the voltage waveform distortion for railway power system, add the loss of the power attenuation and electrical equipment of railway transmission line of electricity, the quality of power supply of electric power system is reduced, will also result in railway power system with time-harmonic wave occurs some accidents.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide the low pressure dynamic compensating device of railway power system.
To achieve the above object, the present invention provides following technical scheme：
The present invention relates to railway power system low-voltage dynamic compensating device, including filtering compensation measurement and control instrument, low-voltage distribution system, idle compensating control and switching unit.Three-phase voltage, three-phase current signal are passed to filtering compensation measurement and control instrument by low-voltage distribution system, and idle compensating control is sent after comparison operation outputs signal to switching unit, and switching cell operation is to adjust the voltage and electric current of low-voltage distribution system.The switching unit includes fling-cut switch and capacitor, and the fling-cut switch includes contactor, IGCT and combination switch；The fling-cut switch connects capacitor；Described capacitor uses shunt capacitor；Described capacitor uses filter branches or capacitor branches；Described railway system electric power system low pressure dynamic compensating device also includes display instrument, main switch, RS232/RS485 communication ports and arrester.
Beneficial effects of the present invention：The present invention can be applicable to rated operational voltage AC100-600V, in frequency 50-60HZ distribution system, the output of reactive power can be automatically adjusted according to the number of system inductive reactive power amount, system reactive power is set to obtain effective compensation, regulation power factor of electric network is between 0.97-1.0；According to loop harmonic wave feature, switching unit is adjusted by reactive-load compensator, the series resonance frequency of adjustment circuit is allowed to the harmonic frequency being less than in system, reduce the interference of electric current, voltage distortion and mitigation to other electronic load normal works, so as to improve grid supply quality, system transformer and line loss are reduced.
Brief description of the drawings
Fig. 1 is the theory diagram of patent of the present invention.
Embodiment
The embodiment of the present invention is further described below in conjunction with accompanying drawing：
Railway system electric power system low pressure dynamic compensating device, as shown in figure 1, including filtering compensation measurement and control instrument, low-voltage distribution system, idle compensating control and switching unit.Three-phase voltage, three-phase current signal are passed to filtering compensation measurement and control instrument by low-voltage distribution system, and idle compensating control is sent after comparison operation outputs signal to switching unit, and switching cell operation is to adjust the voltage and electric current of low-voltage distribution system.The switching unit includes fling-cut switch and capacitor, and the fling-cut switch includes contactor, IGCT and combination switch；The fling-cut switch connects capacitor；Described capacitor uses shunt capacitor；Described capacitor uses filter branches or capacitor branches；Described railway system electric power system low pressure dynamic compensating device also includes display instrument, main switch, RS232/RS485 communication ports and arrester.
Functions in railway system electric power system low pressure dynamic compensating device are described below：
The effect of idle compensating control：Sampling, calculating, display data (such as reactive power), send control and protection instruction；
Display instrument：Show electric current, voltmeter；Effect shows reactive current and system voltage (matching somebody with somebody current transformer)；
Main switch is acted on：Maintenance and overcurrent protection；
Arrester：Overvoltage protection；
Three kinds of fling-cut switch effects：Switched capacitor；
Reactor：It is adapted to the load for having harmonic wave；Protective condenser；
The effect of housing and the supporting cabinet type of user：Take up device.
The advantage of dynamic compensation：Reaction is fast, and compensation effect is good, is particularly suitable for the violent occasion of the fluctuation of load.Dynamic
Compensation generally also has a point benefit function, can do good compensation to unbalanced load.
Device mainly uses idle compensating control, the data such as electric current, voltage, the active and reactive and power factor of collecting computer circuit or controller switching equipment, application region control principle, controls switched capacitor, realizes reactive power automatic compensation with matching somebody with somebody electro-detection function.Device can correctly control the switching of capacitor, make transformer low voltage three-phase in a basic balance, and make power network power factor regulation to optimum state.With manual, automatic, self-checking function：Device can manual switching, and can automatic switching, facilitate user's pilot scale study and operation, device also has self-checking function, it is whether correct for auxiliary examination wiring.
Claims (3)
1. device includes filtering compensation measurement and control instrument, low-voltage distribution system, idle compensating control and switching unit, low pressure is matched somebody with somebody
Three-phase voltage, three-phase current signal are passed to filtering compensation measurement and control instrument by electric system, idle compensating control through than
Output signal to switching unit compared with being sent after computing, switching cell operation with adjust low-voltage distribution system voltage and
Electric current.
2. according to claim 1, switching unit includes fling-cut switch and capacitor, the fling-cut switch includes contact
Device, IGCT and combination switch；The fling-cut switch connects capacitor；Described capacitor uses shunt capacitance
Device；Described capacitor uses filter branches or capacitor branches.
3. according to claim 1, described railway system electric power system low pressure dynamic compensating device also include display instrument,
Main switch, RS232/RS485 communication ports and arrester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208131.8A CN107294107A (en) | 2016-04-05 | 2016-04-05 | railway power system low-voltage dynamic compensating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208131.8A CN107294107A (en) | 2016-04-05 | 2016-04-05 | railway power system low-voltage dynamic compensating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107294107A true CN107294107A (en) | 2017-10-24 |
Family
ID=60092746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610208131.8A Pending CN107294107A (en) | 2016-04-05 | 2016-04-05 | railway power system low-voltage dynamic compensating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107294107A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509708A (en) * | 2020-04-26 | 2020-08-07 | 云南电网有限责任公司电力科学研究院 | Low-voltage single-phase power supply conversion device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201178312Y (en) * | 2008-03-26 | 2009-01-07 | 英博白云电气技术（扬州）有限公司 | Low-voltage dynamic filtering compensating apparatus |
| CN202957605U (en) * | 2012-11-15 | 2013-05-29 | 成都星宇节能技术股份有限公司 | High power dynamic cutting unit |
| CN103441511A (en) * | 2013-08-14 | 2013-12-11 | 毛振刚 | Intelligent low-voltage dynamic-compensation energy-saving filtering device |
-
2016
- 2016-04-05 CN CN201610208131.8A patent/CN107294107A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201178312Y (en) * | 2008-03-26 | 2009-01-07 | 英博白云电气技术（扬州）有限公司 | Low-voltage dynamic filtering compensating apparatus |
| CN202957605U (en) * | 2012-11-15 | 2013-05-29 | 成都星宇节能技术股份有限公司 | High power dynamic cutting unit |
| CN103441511A (en) * | 2013-08-14 | 2013-12-11 | 毛振刚 | Intelligent low-voltage dynamic-compensation energy-saving filtering device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509708A (en) * | 2020-04-26 | 2020-08-07 | 云南电网有限责任公司电力科学研究院 | Low-voltage single-phase power supply conversion device and method |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171024 |