CN206533137U - Arc suppression coil of power distribution network distributed compensation device integrated with distribution transformer - Google Patents
Arc suppression coil of power distribution network distributed compensation device integrated with distribution transformer Download PDFInfo
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- CN206533137U CN206533137U CN201720219576.6U CN201720219576U CN206533137U CN 206533137 U CN206533137 U CN 206533137U CN 201720219576 U CN201720219576 U CN 201720219576U CN 206533137 U CN206533137 U CN 206533137U
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- arc suppression
- suppression coil
- compensation device
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- distribution
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Abstract
The utility model discloses a kind of arc suppression coil of power distribution network distributed compensation device integrated with distribution transformer, it includes, high-pressure side winding, low-pressure side winding, arc suppression coil and built-in neutral point；The high-pressure side winding uses the Z-type mode of connection, and the built-in neutral point connects arc suppression coil through wire.The compensation device is using collection arc suppression coil distributed compensation mode integrated with distribution transformer, the problems such as solving the not enough caused idleness of equipment of arc suppression coil of power distribution network compensation capacity and can not put into operation, evade the technical bottleneck of existing transformer and distribution station compensation way, give full play to the flexibility of distributed compensation.Meanwhile, the device reduces device fabrication cost, reduces equipment volume, reduces the requirement of installing space on distribution line post, significantly reduces the intensity of equipment operation maintenance work.
Description
Technical field
The utility model belongs to system for distribution network of power technical field, and in particular to arc suppression coil of power distribution network and distribution transformer
Device integration distributed compensation device.
Background technology
Power distribution network is to receive electric energy from power transmission network, is reallocated to the power network of power consumer.35kV, 66kV and 110kV electricity
The distribution for pressing grade is high voltage distribution network, and 10kV and 20kV (China some areas have part) are medium voltage distribution network, and 0.4kV is
Low-voltage network.In general, the neutral grounding mode of power distribution network is broadly divided into earth-free, resistance grounded and through arc blowout wire
Circle three kinds of modes of ground connection.Wherein, the principle through grounding through arc mode is, in transformer and distribution station distribution transformer neutral point and greatly
Arc suppression coil is accessed between ground, when unsymmetrical short-circuit occurs for system, power distribution network system is offset using the inductance current of arc suppression coil
The capacity current of system, thus realize suppress into ground capacitance current it is excessive the problem of.Power distribution network uses overcompensation mode, it is desirable to extinguishing arc
The inductance current of Coil Compensation is more than 1.35 times into ground capacity current.
《Power engineering electrical design handbook：Electrical primary part》Regulation：Work as singlephase earth fault in isolated neutral system
When capacitance current is no more than 10A, earth-free mode should be used.3kV~10kV be not directly connected generator system and 35kV,
66kV systems, when singlephase earth fault capacitance current is more than 10A, should use grounding through arc mode.However, with power distribution network
Development and transformation, power cable used in urban distribution network 10kV and 35kV system is more and more.The big face of power cable
Product is used, and causes the capacitance current of distribution network system to increase substantially, some areas have been even more than 200A, have been far longer than design
10A as defined in code.The present situation causes the arc suppression coil off-capacity that the distribution network system first wife using grounding through arc puts,
In addition simple increase arc suppression coil capacity can face not enough, switch position limitation of adjustable range etc. and coordinate difficult, and then forces and match somebody with somebody
Exiting for a large amount of arc suppression coils of power network is used, and while arc suppression coil compensation advantage is not used, also creates compensating for resource
Idle and waste.
The content of the invention
In view of the deficiencies in the prior art, the technical problems to be solved in the utility model is：Expand current power industry extinguishing arc
The theory of coil distributed compensation, using arc suppression coil distributed compensation integrated with distribution transformer (abbreviation compensation device)
New method, the problems such as solving the not enough caused idleness of equipment of existing arc suppression coil of power distribution network compensation capacity and can not put into operation, is effectively carried
The power supply reliability of high power distribution network.
Concrete technical scheme of the present utility model is that a kind of arc suppression coil of power distribution network is integrated with distribution transformer distributed
Compensation device, distribution transformer on distribution line pole king-post is integrated with arc suppression coil, described device includes, high-pressure side around
Group, low-pressure side winding, arc suppression coil and built-in neutral point, the high-pressure side winding use the Z-type mode of connection, described built-in neutral
Point connects arc suppression coil through wire.
Further, it is its own capacity that the Z-type connected mode band of the high-pressure side winding, which carries the ability of arc suppression coil,
90%-100%.
Further, the compensation device is arranged on distribution line pole king-post, is configured with the connector of fixed installation.
Further, the compensation device carries metal shell, and shell draws ground terminal.
Further, the compensation device is also configured with high-pressure side sleeve pipe, low-pressure side sleeve pipe.
Further, the high-pressure side winding is three-phase windings.
Further, the low-pressure side winding is three-phase four-wire system.
Further, the arc suppression coil tail end draws ground terminal.
Compared with prior art, the utility model has the advantages that：Using collection arc suppression coil and distribution transformer
The new approaches of integrated distributed compensation.Said from technical principle angle, the installation position of arc suppression coil is no longer limited to become distribution
The neutral point of institute's transformer, has fundamentally evaded same infield and has installed adjustable range that many arc suppression coils are brought not
The technologies such as foot, switch position limitation coordinate difficult；Simultaneously as the installation site arc suppression coil phase configured with transformer and distribution station
It is mutually independent, therefore original arc suppression coil capacity and capacity matching problem in transformer and distribution station need not be considered, only need to be according to now and not
Come 5-10 power distribution network development plan demand calculate added compensation capacity just can, compensation needed for also or only considering newly-increased circuit is held
Amount can equally realize distributed compensation.Slave unit is manufactured and said using angle, and the utility model is by distribution transformer and extinguishing arc
Coil over all Integration, reduces device fabrication cost, reduces equipment volume, and reduce installing space on distribution line post will
Ask, while also significantly reducing the intensity of equipment operation maintenance work.
Brief description of the drawings
Fig. 1 electrically connects for the utility model arc suppression coil of power distribution network distributed compensation device integrated with distribution transformer
Line chart.
Fig. 2 matches somebody with somebody for the installation of the utility model arc suppression coil of power distribution network distributed compensation device integrated with distribution transformer
Put figure.
In figure：1- cement shaft towers, 2- fixed plates, 3- compensation devices, 4- metal shells, 5- high-pressure sides sleeve pipe, 6- low-pressure sides
Sleeve pipe, 7- ground terminals, 8- high-pressure sides winding, 9- low-pressure side windings, 10- arc suppression coils, neutral point built in 11-.
Embodiment
Below in conjunction with the accompanying drawings, the utility model is further described.
A kind of arc suppression coil of power distribution network distributed compensation device integrated with distribution transformer, including, high-pressure side winding 8,
Low-pressure side winding 9, arc suppression coil 10 and built-in neutral point 11, the high-pressure side winding use the Z-type mode of connection, it is described it is built-in in
Property point through wire connect arc suppression coil.
As shown in figure 1, integrated with distribution transformer point of the arc suppression coil being connected on distribution line A, B, C three-phase system
Cloth compensation device, inside mainly includes, high-pressure side winding 8, low-pressure side winding (three-phase four-wire system) 9, arc suppression coil 10 and interior
Put neutral point 11.The compensation device is different from current power distribution network and installs compensating arc distinction line in transformer and distribution station distribution transformer neutral point
The mode of circle, but distribution transformer and arc suppression coil are integrated into entirety, distribution line is installed in the way of single device
On shaft tower.The compensation device is not only conformed with《Power engineering electrical design handbook：Electrical primary part》In on " any operation
Under mode, power network must not lose the compensation of arc suppression coil；An electric substation should be avoided to install many arc suppression coils " regulation；Also
Same infield is fundamentally evaded and not enough, switch position limitation of adjustable range that many arc suppression coils are brought etc. is installed
Technology coordinates difficult.
In this demonstration example, when distribution system normal work, its A, B and C tri- be close balance, meet the quality of power supply will
Ask, now arc suppression coil distributed compensation device integrated with distribution transformer carries defeated equivalent to conventional electrical distribution transformer
The function of power transmission energy.When system single phase ground fault, A, B and C three-phase system not releveling, system produce zero-sequence current
Component.For the more distribution system of power cable outlet, during single-line to ground fault, system enter ground capacitance current compared with
Greatly, now arc suppression coil plays its compensating action, using the short-circuit capacity current of the inductive current compensation system of its generation, so that
It ensure that the security reliability of power distribution network.I.e.：Arc suppression coil distributed compensation device integrated with distribution transformer is set with separate unit
Standby form, realizes the dual-use function of arc suppression coil and distribution transformer.
In this demonstration example, high voltage side of transformer three-phase windings use the Z-type mode of connection, i.e., be divided into two groups of difference per phase coil
Reversely it is around in the phase magnetic pole, the advantage so connected is that transformer zero sequence fluxes can circulate along magnetic pole, so Z-type ground connection becomes
The zero sequence impedance very little (about 10 Ω) of depressor, much smaller than common transformer.In addition, Z-type connected mode form one can within
Portion connects the neutral point of arc suppression coil, and this is also key point of the present utility model.Distribution transformer is generally adopted on traditional post
Use Dyn11Or Yyn0Connected mode, do not possess directly band load arc suppression coil ability.And connected in the utility model using Z-type
Mode is connect, integration can be not only realized with the ability for carrying arc suppression coil, while its capacity with the arc suppression coil carried can reach
To the 90%-100% of transformer itself capacity, load capacity of its utilization rate considerably beyond transformer 20%.
As shown in Fig. 2 arc suppression coil of power distribution network of the present utility model distributed compensation device 3 integrated with distribution transformer
On the fixed plate 2 for being installed on distribution line cement shaft tower 1, its metal shell (profile) 4, high-pressure side sleeve pipe 5, low-pressure side sleeve pipe
(three-phase four-wire system) 6 is as good as with distribution transformer in conventional post, and the significant difference of contour structures is the setting of ground terminal 7,
Traditional distribution transformer is in arc suppression coil tail end and is not provided with ground terminal.
In this demonstration example, the compensation device is installed on distribution line pole king-post, and its compensation capacity need to only consider currently
And the planning and development demand of future 5-10 distribution systems, i.e., the base of arc suppression coil compensation capacity has been installed in current transformer and distribution station
On plinth, individually consider added compensation capacity number just may be used；Compared to being installed on for transformer and distribution station, pacify on shaft tower post
Dress, technology restriction is few, easy to operate.Meanwhile, it is installed on distribution line pole king-post, belongs to local compensation, better adapt to distribution
The development and change of net, have fully demonstrated the strong advantage of distributing compensation flexibility.
In this demonstration example, the arc suppression coil is integrated into entirety with distribution transformer, for the distribution transformer of independent operating
For device and arc suppression coil, equipment volume is greatly reduced；Meanwhile, its cost is cut down significantly after the two is integrated, more economical.
The utility model arc suppression coil of power distribution network distributed compensation device integrated with distribution transformer is by distribution transformer
With arc blowout wire over all Integration, equipment integral requirement place capacity need to take into account distribution load capacity and power distribution network enters ground capacitance current
Compensation capacity.
In this demonstration example, transformer uses Z-type connected mode in compensation device, and the winding connection band carries arc suppression coil
Ability be its own capacity 90%-100%.The compensation capacity Q of arc suppression coil can be according to the planning of power distribution network power cable
Enter ground capacitance current or survey into ground capacitance current IcCalculated, see below formula：
In above formula, Q is the compensation capacity of arc suppression coil,
K is penalty coefficient, takes 1.35,
IcEnter ground capacitance current for power distribution network,
UNFor power distribution network rated voltage.
Calculated and obtained after arc suppression coil compensation capacity Q according to above formula, the load capacity of transformer is connected according to Z-type, just may be used
Obtain capacity requirement Q of the arc suppression coil to transformer1.Distribution transformer conveying on the post of Electric Design department offer is inquired about again to hold
Measure Q2.Then in arc suppression coil distributed compensation device integrated with distribution transformer distribution transformer capacity QTFor Q1And Q2In
The greater (consider certain nargin).With reference to Power System Planning, the later stage of the present apparatus, which develops, can form product capacity sequence,
When its economy and practicality will be more considerable.
The purpose of this utility model, technical scheme and beneficial effect are described in detail above, it should be understood that with
Upper described is only embodiment of the present utility model, is not used to limit protection domain of the present utility model, it is all
Any modification, equivalent substitution and improvements done within spirit and principle of the present utility model etc., should be included in the utility model
Protection domain within.
Claims (8)
1. a kind of arc suppression coil of power distribution network distributed compensation device integrated with distribution transformer, it is characterised in that by distribution wire
Distribution transformer is integrated with arc suppression coil on line pole tower post, and described device includes, and high-pressure side winding, low-pressure side winding, is disappeared
Arc coil and built-in neutral point, the high-pressure side winding use the Z-type mode of connection, and the built-in neutral point connects extinguishing arc through wire
Coil.
2. compensation device according to claim 1, the Z-type connected mode band of the high-pressure side winding carries the energy of arc suppression coil
Power is the 90%-100% of its own capacity.
3. compensation device according to claim 1, it is characterised in that the compensation device is arranged on distribution line pole king-post
On, it is configured with the connector of fixed installation.
4. compensation device according to claim 1, it is characterised in that characterized in that, the compensation device carries metal
Shell, shell draws ground terminal.
5. compensation device according to claim 1, it is characterised in that the compensation device be also configured with high-pressure side sleeve pipe,
Low-pressure side sleeve pipe.
6. compensation device according to claim 1, it is characterised in that the high-pressure side winding is three-phase windings.
7. compensation device according to claim 1, it is characterised in that the low-pressure side winding is three-phase four-wire system.
8. compensation device according to claim 1, it is characterised in that the arc suppression coil tail end draws ground terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720219576.6U CN206533137U (en) | 2017-03-08 | 2017-03-08 | Arc suppression coil of power distribution network distributed compensation device integrated with distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720219576.6U CN206533137U (en) | 2017-03-08 | 2017-03-08 | Arc suppression coil of power distribution network distributed compensation device integrated with distribution transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206533137U true CN206533137U (en) | 2017-09-29 |
Family
ID=59918290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720219576.6U Expired - Fee Related CN206533137U (en) | 2017-03-08 | 2017-03-08 | Arc suppression coil of power distribution network distributed compensation device integrated with distribution transformer |
Country Status (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877306A (en) * | 2017-03-08 | 2017-06-20 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Arc suppression coil of power distribution network distributed compensation device integrated with distribution transformer |
| CN107706901A (en) * | 2017-11-07 | 2018-02-16 | 国网安徽省电力公司经济技术研究院 | A kind of optimization dispersion compensation method of arc suppression coil of power distribution network |
-
2017
- 2017-03-08 CN CN201720219576.6U patent/CN206533137U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877306A (en) * | 2017-03-08 | 2017-06-20 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Arc suppression coil of power distribution network distributed compensation device integrated with distribution transformer |
| CN106877306B (en) * | 2017-03-08 | 2020-05-08 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Distribution network arc suppression coil and distribution transformer integrated distributed compensation device |
| CN107706901A (en) * | 2017-11-07 | 2018-02-16 | 国网安徽省电力公司经济技术研究院 | A kind of optimization dispersion compensation method of arc suppression coil of power distribution network |
| CN107706901B (en) * | 2017-11-07 | 2019-08-16 | 国网安徽省电力公司经济技术研究院 | A kind of optimization dispersion compensation method of arc suppression coil of power distribution network |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170929 Termination date: 20210308 |