CN206807008U - The controlling device of urban track traffic load hauling cable Harmonics amplification - Google Patents

Abstract

The utility model discloses a kind of controlling device of urban track traffic load hauling cable Harmonics amplification to be related to urban track traffic tractive power supply system harmonic wave control technical field, the problem of causing Harmonics amplification for existing urban track traffic load hauling cable does not have the problem of good solution, using including three structures, the identical filter unit of parameter, filter unit includes high voltage isolator, high voltage isolator end of incoming cables is connected with bus, high voltage isolator leading-out terminal is connected after detecting current transformer through overcurrent with reactor end of incoming cables, reactor leading-out terminal is connected with six ends of incoming cables of six tunnel capacitor banks respectively, capacitor bank leading-out terminal is connected with each other after detecting transformer through an out-of-balance current, the utility model has simple in construction, it is easy to connect, the characteristics of harmonic wave control significant effect.

Description

The controlling device of urban track traffic load hauling cable Harmonics amplification

Technical field

It the utility model is related to urban track traffic tractive power supply system harmonic wave control technical field, more particularly to a kind of city The controlling device of city's track traffic load hauling cable Harmonics amplification.

Background technology

With the acceleration of Chinese Urbanization, urban transport problems becomes increasingly conspicuous, and urban track traffic has capacity big, fast Degree is fast, cost is low, save the energy and to alleviate traffic above-ground crowded and the advantages that be advantageous to environmental protection, becomes The hot fields of social development.Major cities are built or just in planning construction City Rail Transit Systems in succession at present.

However, as D.C. high voltage transmission, electric railway and iron and steel enterprise more and more access 110kV and the above Power system, its caused harmonic injection system turn into the background harmonicses source of urban track traffic load.Urban track traffic is certainly Body generally uses direct current supply mode, and tractive power supply system is changed alternating current using the Rectification Power Factor of 12 pulse waves or 24 pulse waves Into the direct current needed for train.These Rectification Power Factors can all produce substantial amounts of harmonic injection system, Cheng Liao during operation The main source of harmonic wave in system.

Because urban track traffic tractive power supply system service cable length is long, the equivalent charging capacitor of cable is big, often leading Draw electric power system load it is smaller when there is reactive power releasing phenomenon.Urban track traffic simultaneously is by caused by background harmonicses and itself Harmonic effects, may in certain subfrequency the capacitive reactance of cable charging capacitor and system impedance, transformer impedance, load impedance it Between series parallel resonance occurs, cause Harmonics amplification phenomenon, and then influence the safety and stability of urban track traffic tractive power supply system Operation.

Industry engineers and technicians think to take the mode of reactive-load compensation, and the charge power of trailing cable has been compensated can To solve the problems, such as Harmonics amplification, this viewpoint is wrong.The method does not destroy trailing cable condition of resonance, traction electricity The charging capacitor of cable can still cause series parallel resonance.If a resonant frequency time reactance in parallel is equal to trailing cable in systems The inductance of resonant frequency time capacitive reactance carries out reactive-load compensation.Although condition of resonance can be changed so that system that connection in series-parallel does not occur is humorous Shake, but the capacity of reactor now is hundreds of megavars not to be inconsistent with current conditions.Active Power Filter-APF is due to its voltage etc. The limitation of level, it is impossible to filter out the harmonic wave of high-pressure system.Cause asking for Harmonics amplification for urban track traffic load hauling cable Inscribe how this solves, also without the solution of correlation in existing technology.

The content of the invention

The utility model provides a kind of controlling device of urban track traffic load hauling cable Harmonics amplification, to solve The problem of existing urban track traffic load hauling cable causes Harmonics amplification does not have the problem of good solution.

To solve the above problems, the utility model adopts the following technical scheme that realization：

A kind of controlling device of urban track traffic load hauling cable Harmonics amplification, described device include three structures, The identical filter unit of parameter；

The filter unit includes high voltage isolator, and the end of incoming cables of the high voltage isolator is connected with bus, described The leading-out terminal of high voltage isolator is connected after detecting current transformer through overcurrent with the end of incoming cables of reactor, the reactor Leading-out terminal be connected respectively with six ends of incoming cables of six tunnel capacitor banks, the leading-out terminal of the capacitor bank passes through an imbalance It is connected with each other after current detecting transformer.

Preferably, the end of incoming cables of the reactor is also connected with an arrester one end, arrester other end ground connection.

Preferably, a reactor both ends noninductive resistance also in parallel.

Preferably, the high voltage isolator is GW4-35D/630.

Preferably, the overcurrent detection current transformer is LB6-35-400/5；The out-of-balance current detects mutual inductance Device is LB6-35-10/5.

Preferably, the reactor is dry-type hollow filter reactor LKKT-35-541-5.74.

Preferably, the noninductive resistance is high-power filter resistor RWGL-35/12-2000.

Preferably, the arrester is Zinc-Oxide Arrester HY5W-51/134.

Preferably, the capacitor is ac filter electric capacity AAM6.1-550-1W.

Preferably, the capacitor bank forms to be serially connected by multiple capacitors.

The utility model has the characteristics of simple in construction, easy to connect, harmonic wave control significant effect.

Brief description of the drawings

Fig. 1 is device wiring schematic diagram provided by the utility model.

Embodiment

To make the purpose of this utility model, technical scheme and advantage clearer, implement below in conjunction with the utility model Accompanying drawing in example, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that described reality It is the utility model part of the embodiment to apply example, rather than whole embodiments.Generally it is described and illustrated herein in the accompanying drawings The detailed description of embodiment of the present utility model is not intended to limit claimed the scope of the utility model, but only table Show selected embodiment of the present utility model.Based on the embodiment in the utility model, those of ordinary skill in the art are not doing Go out under the premise of creative work the every other embodiment obtained, belong to the scope of the utility model protection.

A kind of controlling device of urban track traffic load hauling cable Harmonics amplification, as shown in figure 1, the device includes Three structures, the identical filter unit of parameter；

The filter unit includes high voltage isolator, and the high voltage isolator end of incoming cables is connected with bus, high pressure every It is connected after detecting current transformer through overcurrent from switch wire outlet terminal with reactor end of incoming cables, the reactor leading-out terminal difference It is connected with six ends of incoming cables of six tunnel capacitor banks, the capacitor bank leading-out terminal detects transformer through an out-of-balance current After be connected with each other, capacitor bank is formed to be serially connected by multiple capacitors.

Wherein, the reactor end of incoming cables is also connected with an arrester, arrester other end ground connection；The reactor two An end noninductive resistance also in parallel；The high voltage isolator is GW4-35D/630；The overcurrent detects current transformer LB6-35-400/5；The out-of-balance current detection transformer is LB6-35-10/5；The reactor is dry-type hollow filtered electrical Anti- device LKKT-35-541-5.74；The noninductive resistance is high-power filter resistor RWGL-35/12-2000；The arrester For Zinc-Oxide Arrester HY5W-51/134；The capacitor is ac filter electric capacity AAM6.1-550-1W.

High voltage isolator GW4-35D/630, configuration current quick-breaking, overcurrent protection, for reacting the electric capacity of wave filter The short circuit of connecting line between device group and breaker, it is general use in limited time current quick-breaking charged surge with escaping capacitor.Overcurrent Protection is used as standby, escapes long-term work peak load；Out-of-balance current detects transformer LB6-35-400/5 and imbalance electricity Stream detection transformer is LB6-35-10/5, is applied in 35kV voltage class branch current and double star neutral point out-of-balance current Wiring is protected, no-load voltage ratio is respectively 400A/5A and 10A/5A；

Dry-type hollow filter reactor LKKT-35-541-5.74, rated current 86A, inductance ratings 5.74H, fundamental wave quality Factor is more than or equal to 25, using dry-type hollow, film alclad line winding structure, adjusts sense scope ± 5%, while noninductive resistance in parallel, this Individual noninductive resistance normal work is inoperative, only can just be worked in abnormal cases, is mainly used in that thunder and lightning occurs Or the over-voltage condition such as operation is used for discharge current.

Zinc-Oxide Arrester HY5W-51/134, peak point current 1A, maximum discharge current 134A.It is mainly used in filtering The capacitor bank of device has overvoltage and low-voltage variation, utilizes bus-bar potential transformer PT measurements and protective condenser group.Capacitor Voltage protection is mainly used in the stable overvoltage of anti-locking system and low-voltage, the setting valve of overvoltage protection typically take rated capacitor 1.1 times of voltage.It is both at home and abroad at present to use Zinc-Oxide Arrester more（MOA）Switching overvoltage is carried out to the capacitor bank of wave filter Protection.

Single capacitor rated voltage 6.10kV, individual capacity 550kvar, capacitor connected mode is 6 and 4 strings, is formed It is 13.2Mvar per phase capacitance.Capacitor bank is composed in series by many single capacitors, and individual capacitors failure is by other Corresponding fuse excision, on whole capacitor bank without much influences.It is to work as more capacitor faults in capacitor bank to be blown After device excision, it is possible to make residual capacitance device heavy overload and the overvoltage continued to run with.Therefore it must take into consideration special holding Measure.Cause the capacity unmbalance between the corresponding two parts of capacitor bank content after capacitor failure, it is special using this Property may be constructed various protected modes.Its general principle is the difference shape using the capacitance between certain two parts inside capacitor bank Into curtage difference form protection, be exactly so-called unbalance protection.35kV high-voltage capacitors group connects in this programme Line mode, using Y-Y connection, judge unbalanced current protection.One group capacitor is divided into two equal star electricity of capacity Container group, the current transformer of small no-load voltage ratio is installed between two neutral points, that is, form double star neutral point unbalanced current protection Wiring.

Claims (10)

1. A kind of 1. controlling device of urban track traffic load hauling cable Harmonics amplification, it is characterised in that：

   Described device includes three structures, the identical filter unit of parameter；

   The filter unit includes high voltage isolator, and the end of incoming cables of the high voltage isolator is connected with bus, the high pressure The leading-out terminal of disconnecting switch is connected after detecting current transformer through overcurrent with the end of incoming cables of reactor, and the reactor goes out Line end is connected with six ends of incoming cables of six tunnel capacitor banks respectively, and the leading-out terminal of the capacitor bank passes through an out-of-balance current It is connected with each other after detection transformer.
2. 2. device according to claim 1, it is characterised in that：The end of incoming cables of the reactor also with an arrester one end Connection, arrester other end ground connection.
3. 3. device according to claim 1, it is characterised in that：A reactor both ends noninductive resistance also in parallel.
4. 4. device according to claim 1, it is characterised in that：The high voltage isolator is GW4-35D/630.
5. 5. device according to claim 1, it is characterised in that：The overcurrent detection current transformer is LB6-35- 400/5；The out-of-balance current detection transformer is LB6-35-10/5.
6. 6. device according to claim 1, it is characterised in that：The reactor is dry-type hollow filter reactor LKKT- 35-541-5.74。
7. 7. device according to claim 3, it is characterised in that：The noninductive resistance is high-power filter resistor RWGL- 35/12-2000。
8. 8. device according to claim 2, it is characterised in that：The arrester is Zinc-Oxide Arrester HY5W-51/134.
9. 9. device according to claim 1, it is characterised in that：The capacitor bank to be serially connected by multiple capacitors and Into.
10. 10. device according to claim 9, it is characterised in that：The capacitor is ac filter electric capacity AAM6.1-550- 1W。