CN201733102U - High-reliability electrified railway microcomputer-control voltage-regulating type reactive power automatic compensation device - Google Patents
High-reliability electrified railway microcomputer-control voltage-regulating type reactive power automatic compensation device Download PDFInfo
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- CN201733102U CN201733102U CN201020275392XU CN201020275392U CN201733102U CN 201733102 U CN201733102 U CN 201733102U CN 201020275392X U CN201020275392X U CN 201020275392XU CN 201020275392 U CN201020275392 U CN 201020275392U CN 201733102 U CN201733102 U CN 201733102U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model discloses a high-reliability electrified railway microcomputer-control voltage-regulating type reactive power automatic compensation device, which comprises a voltage transformer and a current transformer positioned in a power grid circuit. The output signals of the voltage transformer and the current transformer are outputted to the signal input end of a reactive power automatic compensation microprocessor, the output end of the microprocessor is connected with a capacitor bank through a voltage regulating unit, and a vacuum circuit breaker is connected between a power grid bus bar and the voltage regulating unit. The automatic compensation device is characterized in that a direct-current power supply connected with the vacuum circuit breaker is further included. The vacuum circuit breaker of the device adopts direct-current power supply, so as to ensure continuous operation of the vacuum circuit breaker and improve the operation stability of the device and the safety of the system. Also, an on-load tap switch is connected with an oil filter press, so as to ensure breakdown voltage and service life of oil, reduce frequency of power-cut maintenance, and effectively improve the operation safety and reliability of the on-load tap switch.
Description
Technical field
The utility model relates to a kind of reactive power compensator that is applied to field of power, relates in particular to a kind of electric railway system controlled by computer voltage regulating imaginary power automatic compensation device of high reliability.
Background technology
At present, because the speed-raising of railroad train, vehicle density and loading capacity increase, and traction load is constantly increased, and the energy changing of several thousand kW was just arranged in tens seconds.Most of traction substation has all installed fixedly parallel condenser compensation device additional, so exporting idle is a constant, can't carry out dynamic compensation to traction load, when no traction load, easily form overcompensation, undercompensation when traction load is arranged causes the traction substation power factor to reduce.How effectively to compensate to improve power factor traction substation is idle, be the problem that electric railway need solve.At present, though the dynamic compensating device of different modes is arranged both at home and abroad, but all there is problem in various degree, as Chinese patent application number for providing a kind of electric railway system controlled by computer voltage regulating imaginary power automatic compensation device in " 200920257727.2 ", wherein vacuum circuit breaker operating mechanism only adopts AC-powered, therefore there is not AC-powered when the scene, when compensation arrangement breaks down, can not in time disconnect being connected of compensation arrangement and drawing electric network, extremely easily drawing electric network be caused the accident; And the insulating oil in the on load tap changer in the voltage regulator unit in use for some time, impurity such as free carbon in the insulating oil and metal particle increase, make the puncture voltage instability of insulating oil, and useful life is shorter, increased maintenance number of times and maintenance difficulty, thus can not reliability service when causing whole device work.
The utility model content
But the purpose of this utility model provides a kind of electric railway system controlled by computer voltage regulating imaginary power automatic compensation device of high reliability of non-stop run.
The further purpose of the utility model is to improve the reliability of system and the useful life of insulating oil, thereby reduces the power failure maintenance frequency.
For achieving the above object, the utility model adopts following technical proposals: a kind of electric railway system controlled by computer voltage regulating imaginary power automatic compensation device of high reliability, comprise the voltage transformer summation current transformer that is arranged in the electrical network circuit, the output signal of voltage transformer summation current transformer exports the signal input part of imaginary power automatic compensation microprocessor to, output end of microprocessor links to each other with the capacitor group by the voltage regulator unit, be connected with vacuum circuit-breaker between electrical network bus and the voltage regulator unit, also comprise a direct current power supply, described DC power supply is connected with vacuum circuit-breaker.
Described voltage regulator unit is a Loading voltage regulator, is made up of on load tap changer and autotransformer.
Described on load tap changer is connected with oil filter, and the oil-in of oil filter is connected by the oil pumping flange of pipeline and on load tap changer, and oil-out is connected by the oiling flange of pipeline and on load tap changer.
Be connected with valve and three-way pipe on the oil-in of described oil filter and the pipeline that is connected of oil pumping flange, the other end of three-way pipe also is connected with valve; Also be connected with valve and three-way pipe on the oil-out of described oil filter and the pipeline that the oiling flange is connected, the other end of three-way pipe also is connected with valve.
The vacuum circuit-breaker that is provided with between electrical network bus and the Loading voltage regulator in the electric railway system controlled by computer voltage regulating imaginary power automatic compensation device of the utility model high reliability adopts powered by direct current, guaranteed the vacuum circuit-breaker non-stop run, when compensation arrangement breaks down, at any time can disconnect compensation arrangement and draw being connected of network, improve the stability of device operation and the fail safe of system; Wherein on load tap changer is connected with oil filter, oil filter can be removed in the on load tap changer impurity such as free carbon in the insulating oil and metal particle effectively and can reduce micro-moisture under the situation of the normal operation of Loading voltage regulator system, guarantee the puncture voltage and the useful life of oil, reduce the interruption maintenance number of times, effectively improve the fail safe and the reliability of on load tap changer work.
Description of drawings
Fig. 1 is an operation principle block diagram of the present utility model;
Fig. 2 is a circuit connection diagram of the present utility model;
Fig. 3 is the connection diagram of oil filter and on load tap changer in the utility model.
Embodiment
As shown in Figure 1, the electric railway system controlled by computer voltage regulating imaginary power automatic compensation device of the utility model high reliability, comprise the voltage transformer summation current transformer that is arranged in the electrical network circuit, the output of voltage transformer summation current transformer all is connected with the signal input part of A/D change-over circuit with the imaginary power automatic compensation microprocessor by sample circuit, for the microprocessor of built-in A/D change-over circuit, then do not need to be provided with again the A/D change-over circuit.The imaginary power automatic compensation microprocessor links to each other with the background computer system by communication interface, output end of microprocessor is connected with the voltage regulator unit by drive circuit, voltage regulator unit output links to each other with the capacitor group, be provided with vacuum circuit-breaker between electrical network bus and the voltage regulator unit, DC power supply is connected with vacuum circuit-breaker, vacuum circuit-breaker adopts powered by direct current, guarantees the vacuum circuit-breaker non-stop run.The input of sample circuit also is connected with temperature sensor, feedback signal testing circuit, electric capacity pressure differential detection circuit, wherein temperature sensor is used for measuring the voltage difference that oil is warm, feedback signal, electric capacity pressure reduction that feedback switch amount circuit is used for detecting the voltage regulator unit are used for the Measurement of capacitor group of voltage regulator unit, too high or detect when surpassing certain threshold value when voltage regulator unit oil temperature less than the feedback signal of voltage regulator unit or capacitor pressure reduction, microprocessor output control signal disconnects vacuum circuit-breaker, and package unit is disconnected and being connected of bus.
As shown in Figure 2, control cubicle ZWK comprises microprocessor and background computer system and peripheral circuits thereof, and voltage transformer comprises main transformer voltage transformer YH and capacitor voltage transformer YH11, gathers the voltage signal of bus and the voltage signal at capacitor group two ends respectively; Current transformer comprises main transformer current transformer LH and capacitance current instrument transformer LH11, gathers the current signal of bus and the current signal of capacitor group respectively.Main transformer voltage transformer YH and main transformer current transformer LH are arranged between main transformer circuit contacts net and the control cubicle ZWK, and vacuum circuit-breaker ZN is connected between electrical network bus and the Loading voltage regulator TW, is used to carry out error protection.Be connected with lightning arrester and discharge counter BL between vacuum circuit-breaker ZN and the Loading voltage regulator TW, discharge counter is connected on lightning arrester below, to lightning arrester discharge counting, guarantees that compensation arrangement avoids lightning impulse.Be connected with high voltage isolator SW between lightning arrester BL and the Loading voltage regulator TW.The output of Loading voltage regulator TW is connected with parallel single-phase capacitor C in turn and (adopts the BAM type, being divided into four strings uses), hollow series reactor L, the separate unit spray-by-type fuse FU use of connecting with parallel single-phase capacitor C, discharge coil FD is connected in parallel on parallel single-phase capacitor C two ends; Be connected with high voltage isolator SW1 between Loading voltage regulator TW and parallel single-phase capacitor C, capacitance current instrument transformer LH11 and capacitor voltage transformer YH11 are connected between control cubicle ZWK and the parallel single-phase capacitor C.
Loading voltage regulator is made up of on load tap changer and autotransformer, on load tap changer is connected with oil filter, as shown in Figure 3, the oil-in of oil filter 1 is connected by oil inlet pipe 3 and on load tap changer 10 interior oil pumping flanges 6, wherein pumping is connected with valve 71, three-way pipe 81 on the pipeline of flange 10 and oil inlet pipe 3 junctions, and wherein the other end of three-way pipe 81 is connected with valve 91; The oil-out of oil filter 1 is connected by the oiling flange 5 of flowline 4 and on load tap changer 10, wherein is connected with valve 81, three-way pipe 82 on the pipeline of oiling flange 5 and flowline 4 junctions, and wherein the other end of three-way pipe 82 is connected with valve 92; Wherein adpting flange 21,22 is used for connecting oil inlet pipe 3 and flowline 4 respectively.Oil filter can be removed in the on load tap changer impurity such as free carbon in the insulating oil and metal particle effectively and can reduce micro-moisture under the situation of the normal operation of Loading voltage regulator system, guarantee the puncture voltage and the useful life of oil, reduce the interruption maintenance number of times, effectively improve the fail safe and the reliability of on load tap changer work.
As shown in Figure 1, the current signal of the voltage signal of main transformer voltage transformer collection and the collection of main transformer current transformer is input in the imaginary power automatic compensation microprocessor by sample circuit and A/D change-over circuit, microprocessor is with the acquired signal process data processing that receives, calculate current apparent power, reactive power, active power, power factor, phase angle, electric parameters such as harmonic wave, compare with the power factor threshold value or the idle threshold value that are provided with in good time, control signal is regulated in output, this control signal is by driving the Loading voltage regulator unit, make Loading voltage regulator export the voltage of different gears, thereby change the terminal voltage of capacitor group, make it to export different reactive powers, follow the tracks of imaginary power automatic compensation, reach timely compensation circuit reactive power, improve power factor, guarantee the purpose of power supply quality.Drive circuit is gathered the current gear tapped off signal of Loading voltage regulator simultaneously, feeds back to microprocessor, and microprocessor is exported in the background computer system through handling computing, shows the current gear of Loading voltage regulator.Microprocessor is also according to capacitor group terminal voltage, current signals computing; the capacitor group is taked various protections such as overvoltage, overcurrent; data such as the operation information of compensation arrangement, electrical quantity, operate time are kept in the memory; and can form data file; these data are input to background computer by communication interface; when monitoring capacitor overvoltage, overcurrent, pressure reduction and temperature of oil in transformer, computer system then outputs signal to microprocessor when too high; make microprocessor output control signal directly drive the vacuum circuit-breaker tripping operation, whole system is protected.Operating personnel can be by computer keyboard and mouse various control models (fast reactive pattern, idle pattern, power factor pattern) at a slow speed each gear reactive power compensation range threshold of voltage regulator and idle at a slow speed pattern trip stop time delays etc. down are set, also can check the data of preservation by computer system, data also can generate tables of data or curve, conveniently monitor in real time.
Claims (4)
1. the electric railway system controlled by computer voltage regulating imaginary power automatic compensation device of a high reliability, comprise the voltage transformer summation current transformer that is arranged in the electrical network circuit, the output signal of voltage transformer summation current transformer exports the signal input part of imaginary power automatic compensation microprocessor to, output end of microprocessor links to each other with the capacitor group by the voltage regulator unit, be connected with vacuum circuit-breaker between electrical network bus and the voltage regulator unit, it is characterized in that: also comprise a direct current power supply, described DC power supply is connected with vacuum circuit-breaker.
2. the electric railway system controlled by computer voltage regulating imaginary power automatic compensation device of high reliability according to claim 1, it is characterized in that: described voltage regulator unit is a Loading voltage regulator, is made up of on load tap changer and autotransformer.
3. the electric railway system controlled by computer voltage regulating imaginary power automatic compensation device of high reliability according to claim 2, it is characterized in that: described on load tap changer is connected with oil filter, the oil-in of oil filter is connected by the oil pumping flange of pipeline and on load tap changer, and oil-out is connected by the oiling flange of pipeline and on load tap changer.
4. the electric railway system controlled by computer voltage regulating imaginary power automatic compensation device of high reliability according to claim 3, it is characterized in that: be connected with valve and three-way pipe on the oil-in of described oil filter and the pipeline that is connected of oil pumping flange, the other end of three-way pipe also is connected with valve; Also be connected with valve and three-way pipe on the oil-out of described oil filter and the pipeline that the oiling flange is connected, the other end of three-way pipe also is connected with valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020275392XU CN201733102U (en) | 2010-07-29 | 2010-07-29 | High-reliability electrified railway microcomputer-control voltage-regulating type reactive power automatic compensation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020275392XU CN201733102U (en) | 2010-07-29 | 2010-07-29 | High-reliability electrified railway microcomputer-control voltage-regulating type reactive power automatic compensation device |
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| Publication Number | Publication Date |
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| CN201733102U true CN201733102U (en) | 2011-02-02 |
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| CN201020275392XU Expired - Lifetime CN201733102U (en) | 2010-07-29 | 2010-07-29 | High-reliability electrified railway microcomputer-control voltage-regulating type reactive power automatic compensation device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148505A (en) * | 2011-04-25 | 2011-08-10 | 北京都市鼎点科技有限公司 | Reactive compensation controller |
| WO2021077751A1 (en) * | 2019-10-24 | 2021-04-29 | 通号(北京)轨道工业集团有限公司轨道交通技术研究院 | High order harmonic suppression circuit for railway circuit |
| CN113036775A (en) * | 2021-02-25 | 2021-06-25 | 杭州银湖电气设备有限公司 | Structure based on magnetic control reactor type hybrid dynamic compensation and control method |
-
2010
- 2010-07-29 CN CN201020275392XU patent/CN201733102U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148505A (en) * | 2011-04-25 | 2011-08-10 | 北京都市鼎点科技有限公司 | Reactive compensation controller |
| WO2021077751A1 (en) * | 2019-10-24 | 2021-04-29 | 通号(北京)轨道工业集团有限公司轨道交通技术研究院 | High order harmonic suppression circuit for railway circuit |
| CN113036775A (en) * | 2021-02-25 | 2021-06-25 | 杭州银湖电气设备有限公司 | Structure based on magnetic control reactor type hybrid dynamic compensation and control method |
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| CX01 | Expiry of patent term |
Granted publication date: 20110202 |
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| CX01 | Expiry of patent term |