CN207200293U - A kind of complete reactive power compensator - Google Patents
A kind of complete reactive power compensator Download PDFInfo
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- CN207200293U CN207200293U CN201721173270.8U CN201721173270U CN207200293U CN 207200293 U CN207200293 U CN 207200293U CN 201721173270 U CN201721173270 U CN 201721173270U CN 207200293 U CN207200293 U CN 207200293U
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- power compensator
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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
It the utility model is related to a kind of complete reactive power compensator, the device is connected in parallel on power network high voltage bus, described compensation device includes low-voltage capacitance compensating cabinet, capacitor switching unit and step-up transformer, described low-voltage capacitance compensating cabinet is connected by capacitor switching unit with step-up transformer low voltage side, and described step-up transformer high-pressure side is connected in parallel on power network high voltage bus.Compared with prior art, the utility model has the advantages that compensation effect is good, effective update the system voltage three-phase imbalance.
Description
Technical field
Electric power quality optimisation technique field is the utility model is related to, more particularly, to a kind of complete reactive-load compensation
Device.
Background technology
Existing reactive power compensator is broadly divided into the passive and class of active compensation two, and wherein active compensation is occurred with static reacance
Device (SVG) is main flow compensation device, but its application cost is high；Passively compensated device is with SVC (SVC) for main flow
As main compensation medium, its advantage is that cost is low, control method is simple, technology maturation, but high for compensation device, wherein electric capacity
There is the traditional SVC device switching unit applied in press-fitting electric system switching to impact, and big, compensation precision is low, is not suitable for frequent switching
The deficiencies of operating mode.
Currently in order to the over-voltage and over-current situations such as arcing are produced when avoiding capacitor cell switching, it is mainly synchronous using operating passing zero
Switching technique, but device is complex, and when the more demand cost of compensating unit number is higher.
Utility model content
The purpose of this utility model is exactly a kind of complete idle in order to be provided the defects of overcoming above-mentioned prior art to exist
Compensation device, it can solve the problem that the impact of conventional high-tension SVC device switching is big, compensation precision is low, be not suitable for the problems such as frequent switching, together
When, installation cost is relatively low, simple in construction.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of complete reactive power compensator, the device are connected in parallel on power network high voltage bus, and described compensation device includes low
Piezoelectricity capacitance compensating cabinet, capacitor switching unit and step-up transformer, described low-voltage capacitance compensating cabinet by capacitor switching unit with
Step-up transformer low voltage side is connected, and described step-up transformer high-pressure side is connected in parallel on power network high voltage bus.
Preferably, described low-voltage capacitance compensating cabinet is divided into A, B, C three-phase, is single low-voltage capacitance compensating cabinet per phase,
Low-voltage capacitance compensating cabinet per phase is connected to step-up transformer low voltage side by least one capacitor switching unit.
Preferably, described capacitor switching unit is the capacitor switching unit with buffering drain charge loop.
Preferably, described capacitor switching unit include controlling switch BK0, slow-operating relay BK2, switching relay BK1,
Buffer resistance R1With discharge resistance R2, described controlling switch BK0 connects with slow-operating relay BK2 coil, described buffering after
Electrical equipment BK2 contact, buffer resistance R1It is sequentially connected in series with the compensating electric capacity unit of low-voltage capacitance compensating cabinet, described switching relay
Device BK1 normally opened contact is connected in parallel on buffer resistance R1 both ends, switching relay BK1 normally-closed contact, discharge resistance R2After series connection,
Described compensating electric capacity unit both ends are connected in parallel on, described switching relay BK1 coils from parallel connection of coils is at compensating electric capacity unit both ends.
Preferably, described low-voltage capacitance compensating cabinet uses three-phase four-wire system topological structure.
Preferably, described compensation device also includes the low pressure static compensating electric capacity list for being connected in parallel on step-up transformer low voltage side
Member.
Preferably, described low pressure static compensating electric capacity unit is connected in parallel on the low pressure of step-up transformer with three-phase and four-line structure
Side.
Preferably, the high-pressure side of described step-up transformer is connected in parallel on power network high voltage bus by breaker.
Preferably, described breaker is two-stage breaker, including the first breaker and the second breaker being sequentially connected in series.
Compared with prior art, the utility model has advantages below：
System architecture is simple, and investment is small, and the reactive loss of step-up transformer, device are compensated by static passive compensation device
Inside does not consume idle, and compensation effect is effectively ensured；Phase splitting compensation, can effective update the system voltage three-phase imbalance；Pass through conjunction
Reason selection compensating electric capacity capacitance, it is possible to achieve quasi- step-less adjustment；Switching is small without harmonic effects, switching impact.
Brief description of the drawings
Fig. 1 is structured flowchart of the present utility model；
Wherein a is complete reactive power compensator, and 1 is low-voltage capacitance compensating cabinet, and 2 be capacitor switching unit, and 3 be boosting transformation
Device, 4 be the first breaker, and 5 be the second breaker, and 6 be high voltage bus, and 7 be low pressure static compensating electric capacity unit.
Fig. 2 is the circuit diagram of the utility model capacitor switching unit；
Wherein BK0 is controlling switch, and BK2 is slow-operating relay, NOBK2For the contact of slow-operating relay, BK1 be switching after
Electrical equipment, NOBK1For the normally opened contact of switching relay, NCBK1For the normally-closed contact of switching relay, R1For buffer resistance, R2To put
Resistance, C are compensating electric capacity unit, and DC1 is control power supply.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that described embodiment is part of the embodiment of the present utility model, rather than is all implemented
Example.Based on the embodiment in the utility model, those of ordinary skill in the art institute on the premise of creative work is not made
The every other embodiment obtained, it should all belong to the scope of the utility model protection.
As shown in figure 1, a kind of complete reactive power compensator a, the device are connected in parallel on power network high voltage bus 6, described benefit
Repaying device includes low-voltage capacitance compensating cabinet 1, capacitor switching unit 2 and step-up transformer 3, and described low-voltage capacitance compensating cabinet 1 is logical
Cross capacitor switching unit 2 to be connected with the low-pressure side of step-up transformer 3, the described high-pressure side of step-up transformer 3 is connected in parallel on power network high pressure
On bus 6.
Described low-voltage capacitance compensating cabinet 1 divides for A, B, C three-phase, per be mutually single low-voltage capacitance compensating cabinet, every phase
Low-voltage capacitance compensating cabinet is connected to step-up transformer low voltage side by least one capacitor switching unit, and device control units is integrated
In A phase cabinets, A, B, C phase cabinet are parallel to AC network by step-up transformer, and control unit is gathered by target compensation voltage, electric current
Deng signal, the switching of every phase compensating electric capacity is uniformly controlled.
Described low-voltage capacitance compensating cabinet uses three-phase four-wire system topological structure, three-phase separate-supplement.Described step-up transformer
High-pressure side be connected in parallel to by breaker on power network high voltage bus.Described breaker is two-stage breaker, including is sequentially connected in series
The first breaker 4 and the second breaker 5.
In preferable scheme, described compensation device also includes the low pressure static compensation for being connected in parallel on step-up transformer low voltage side
Capacitor cell 7, its object is to compensate the emotional resistance of step-up transformer, guarantee complete unit is purely capacitive load.Described
Low pressure static compensating electric capacity unit is connected in parallel on the low-pressure side of step-up transformer with three-phase and four-line structure.
As shown in Fig. 2 described capacitor switching unit is the capacitor switching unit with buffering drain charge loop, including control is opened
Close BK0, slow-operating relay BK2, switching relay BK1, buffer resistance R1With discharge resistance R2, described controlling switch BK0 is with delaying
Rush relay BK2 coil series connection, described slow-operating relay BK2 contact, buffer resistance R1With low-voltage capacitance compensating cabinet
Compensating electric capacity unit is sequentially connected in series, and described switching relay BK1 normally opened contact is connected in parallel on buffer resistance R1 both ends, switching after
Electrical equipment BK1 normally-closed contact, discharge resistance R2After series connection, be connected in parallel on described compensating electric capacity unit both ends, described switching after
Electrical equipment BK1 coils from parallel connection of coils is at compensating electric capacity unit both ends.
As shown in Fig. 2 the switching process of compensating electric capacity unit is as follows：
1) when device input compensation unit, control system closes controlling switch BK0, slow-operating relay BK2 by ordering
It is electric on coil, the contact NO of slow-operating relayBK2Adhesive, compensating electric capacity unit C pass through buffer resistance R1Access external system, electricity
Appearance builds pressure.
2) when compensating electric capacity unit C-terminal mouth voltage reaches switching relay BK1 coil voltages U1When, switching relay it is normal
Open contact NOBK1Adhesive, short-circuit buffer resistance R1, because electric capacity terminal voltage is consistent with external system, it is existing to avoid input electric discharge
As.
When device cuts off compensating unit, BK0 is opened, BK2 coil losing electricities, the contact NO of slow-operating relayBK2Open, throw
Cut relay BK1 coil losing electricities, the normally opened contact NO of switching relayBK1Open, the normally-closed contact NC of switching relayBK1Close
On, compensating unit discharges residual charge by discharge resistance, avoids excision electric discharge phenomena.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art can readily occur in various in the technical scope that the utility model discloses
Equivalent modifications or substitutions, these modifications or substitutions should all cover within the scope of protection of the utility model.Therefore, this practicality
New protection domain should be defined by scope of the claims.
Claims (9)
1. a kind of complete reactive power compensator, the device are connected in parallel on power network high voltage bus, it is characterised in that described compensation dress
Put and thrown including low-voltage capacitance compensating cabinet, capacitor switching unit and step-up transformer, described low-voltage capacitance compensating cabinet by electric capacity
Cut unit is connected with step-up transformer low voltage side, and described step-up transformer high-pressure side is connected in parallel on power network high voltage bus.
A kind of 2. complete reactive power compensator according to claim 1, it is characterised in that described low-voltage capacitance compensating cabinet
It is divided into A, B, C three-phase, per being mutually single low-voltage capacitance compensating cabinet, the low-voltage capacitance compensating cabinet per phase passes through at least one electric capacity
Switching unit is connected to step-up transformer low voltage side.
3. a kind of complete reactive power compensator according to claim 1, it is characterised in that described capacitor switching unit is
Capacitor switching unit with buffering drain charge loop.
A kind of 4. complete reactive power compensator according to claim 1 or 3, it is characterised in that described capacitor switching list
Member includes controlling switch BK0, slow-operating relay BK2, switching relay BK1, buffer resistance R1With discharge resistance R2, described control
System switch BK0 connects with slow-operating relay BK2 coil, described slow-operating relay BK2 contact, buffer resistance R1And low pressure
The compensating electric capacity unit of capacitor compensation cabinet is sequentially connected in series, and described switching relay BK1 normally opened contact is connected in parallel on buffer resistance
R1 both ends, switching relay BK1 normally-closed contact, discharge resistance R2After series connection, described compensating electric capacity unit both ends are connected in parallel on,
Described switching relay BK1 coils from parallel connection of coils is at compensating electric capacity unit both ends.
A kind of 5. complete reactive power compensator according to claim 1, it is characterised in that described low-voltage capacitance compensating cabinet
Using three-phase four-wire system topological structure.
6. a kind of complete reactive power compensator according to claim 1, it is characterised in that described compensation device also includes
It is connected in parallel on the low pressure static compensating electric capacity unit of step-up transformer low voltage side.
A kind of 7. complete reactive power compensator according to claim 6, it is characterised in that described low pressure static compensation electricity
Hold the low-pressure side that unit is connected in parallel on step-up transformer with three-phase and four-line structure.
A kind of 8. complete reactive power compensator according to claim 1, it is characterised in that the height of described step-up transformer
Pressure side is connected in parallel on power network high voltage bus by breaker.
9. a kind of complete reactive power compensator according to claim 8, it is characterised in that described breaker breaks for two-stage
Road device, including the first breaker and the second breaker being sequentially connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721173270.8U CN207200293U (en) | 2017-09-13 | 2017-09-13 | A kind of complete reactive power compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721173270.8U CN207200293U (en) | 2017-09-13 | 2017-09-13 | A kind of complete reactive power compensator |
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| CN207200293U true CN207200293U (en) | 2018-04-06 |
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| CN201721173270.8U Active CN207200293U (en) | 2017-09-13 | 2017-09-13 | A kind of complete reactive power compensator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474343A (en) * | 2019-07-30 | 2019-11-19 | 成都市康立智诚电气有限公司 | A kind of device and method for reactive compensation |
-
2017
- 2017-09-13 CN CN201721173270.8U patent/CN207200293U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474343A (en) * | 2019-07-30 | 2019-11-19 | 成都市康立智诚电气有限公司 | A kind of device and method for reactive compensation |
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