CN207705793U - A kind of power distribution network series and parallel circuit - Google Patents
A kind of power distribution network series and parallel circuit Download PDFInfo
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- CN207705793U CN207705793U CN201721746318.XU CN201721746318U CN207705793U CN 207705793 U CN207705793 U CN 207705793U CN 201721746318 U CN201721746318 U CN 201721746318U CN 207705793 U CN207705793 U CN 207705793U
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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 kind of power distribution network series and parallel circuits, including series capacitor compensation circuit and shunt reactor compensation circuit, the series capacitor compensation circuit is connected in series in the mains side in distribution line, and the shunt reactor compensation circuit is connected in the load-side of distribution line in parallel.The utility model solves the problems, such as the problem of distribution line terminal voltage seriously reduces and distribution line, and compensation effect is not up to standard at light load, while the utility model also has the advantages that promote the transmission capacity of distribution line.
Description
Technical field
The utility model belongs to power system reactive power compensation field, and in particular to a kind of power distribution network series and parallel circuit.
Background technology
The height of power distribution network terminal voltage is to weigh the whether standard compliant important indicator of power supply quality, direct relation
To the safety of electrical equipment, economical operation and the normal operation of production.National standard GB/T12325-2008《Power quality supply voltage
Deviation》Middle regulation " 20kV and following three phase supply voltage deviation are ± the 7% of nominal voltage ".So far, China's power distribution network
It builds opposite power transmission network seriously to lag, mainly there is problems with：(1) electric network composition is complicated, rack is weak；(2) controller switching equipment is old
Change, supply line mostly uses overhead line and line footpath is smaller；(3) supply line head's (especially mountain village circuit), distribution transformer
Capacity is small and quantity is more；(4) motor or variation rapid industrial load of the part circuit with more large capacities.The above
Problem, which often leads to distribution line terminal voltage, seriously to be reduced, and standard and user power utilization requirement are cannot be satisfied.
Currently, the control measures seriously reduced to distribution network line terminal voltage have：(1) shunt capacitance is installed in the line
Device compensates, the disadvantage is that：It is of high cost, and capacity is certain, lacks self-adjusting ability；(2) SVC is installed in the line, the disadvantage is that：
Of high cost, improvement is general；(3) distribution transformer, overhead line etc. are replaced, the disadvantage is that：Of high cost, the period is long.
Utility model content
The purpose of this utility model is to provide a kind of power distribution network series and parallel circuits, to solve asking for the prior art
Topic, the utility model solves the problems, such as distribution line terminal voltage seriously reduce and distribution line compensation effect does not reach at light load
Target problem, while the utility model also has the advantages that promote the transmission capacity of distribution line.
In order to achieve the above objectives, the utility model adopts the following technical solution：
A kind of power distribution network series and parallel circuit, including series capacitor compensation circuit and shunt reactor compensation circuit,
The series capacitor compensation circuit is connected in series in the mains side in distribution line, and the shunt reactor compensation circuit is in parallel
It is connected to the load-side of distribution line.
Further, the series capacitor compensation circuit includes capacitor C1, metal oxide pressure-limiting device MOV, damping
Reactor L1, damping resistance R, circuit breaker Q F and the first vacuum contactor KM1, the capacitor C1 are connected on distribution line
In, metal oxide pressure-limiting device MOV and the first vacuum contactor KM1 are in parallel with capacitor C1, one end of capacitor C1 and damping
Reactor L1 is connected with one end of damping resistance R, and damping reactor L1 is connected with the other end of damping resistance R by circuit breaker Q F
To the other end of capacitor C1.
Further, the shunt reactor compensation circuit is reactor grouping switching type or tunable reactor type.
Further, when shunt reactor compensation circuit is reactor grouping switching type, the shunt reactor compensation
Circuit includes that one end of the first reactor L2 and the second reactor L3, the first reactor L2 is grounded, and the other end passes through the second vacuum
Contactor KM2 is connected to distribution line；One end of second reactor L3 is grounded, and the other end is connected by third vacuum contactor KM3
It is connected to distribution line.
Further, the capacity of the first reactor L2 and the second reactor L3 are equal, and the electricity of the first reactor L2 and second
The capacity of anti-device L3 is 0.01p.u.~20p.u. of capacitor C1.
Further, when shunt reactor compensation circuit is tunable reactor type, the shunt reactor compensation circuit
Including REgulatable reactor L, one end of REgulatable reactor L is grounded, and the other end is connected to distribution line.
Compared with prior art, the utility model has technique effect beneficial below：
The series and parallel technology that the utility model uses can not only improve the terminal voltage of power distribution network well, and have
There is the advantages of other control measures are not had：(1) self-adjusting ability adjusts distribution wire by reactor on the line in parallel
Induction reactance is to reach the self-regulation of distribution line in road；(2) at low cost, the construction period is short；(3) conveying of distribution line can be improved
Ability；(4) being used cooperatively by series capacitor compensation circuit and shunt reactor compensation circuit, both solves distribution line
The problem of terminal voltage seriously reduces, and solve the problems, such as distribution line line build-out effect is not up to standard at light load.
Description of the drawings
Fig. 1 be shunt reactor compensation circuit be reactor grouping switching type circuit when topological diagram；
Fig. 2 be shunt reactor compensation circuit be tunable reactor type circuit when topological diagram.
Wherein, C1 is capacitor；KM1 is the first vacuum contactor；KM2 is the second vacuum contactor；KM3 is third vacuum
Contactor；L1 is damping reactor；L2 is the first reactor；L3 is the second reactor；MOV is metal oxide pressure-limiting device；R is
Damping resistance；QF is breaker；L is REgulatable reactor.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings：
Referring to Fig. 1 and Fig. 2, a kind of series and parallel circuit for distribution line, including series capacitor compensation circuit
With shunt reactor compensation circuit.The series capacitor compensation circuit is connected in series in distribution line；The parallel reactance
Device compensation circuit is connected in parallel in distribution line；The shunt reactor compensation circuit is by vacuum contactor and shunt reactor
Composition；The shunt reactor compensation circuit is connected in the load-side of distribution line in parallel；The shunt reactor passes through vacuum
Contactor input cuts out distribution line；The shunt reactor is REgulatable reactor or reactor grouping switching；The parallel connection
The capacity of reactor is 0.01p.u.~20p.u. of series capacitor capacity.The above-mentioned series and parallel electricity for distribution line
Road can realize following function：The terminal voltage for improving distribution line, improves distribution line at the transmission capacity for promoting distribution line
Quality of voltage；Meanwhile when distribution line at light load, by the throwing of reactor, cut and solve the problems, such as that line build-out effect is not up to standard,
The quality of voltage of distribution line can further be improved.
The utility model is to solve：1) the problem of distribution line terminal voltage seriously reduces；2) distribution line is mended at light load
Repay effect problem not up to standard；Propose a kind of distribution line serial shunt peaking circuit：Including series capacitor compensation circuit and
Shunt reactor compensation circuit.Wherein, series capacitor compensation circuit is for solving what distribution line terminal voltage seriously reduced
Problem；Compensation effect is not up to standard at light load for solving the problems, such as distribution line for shunt reactor compensation circuit.The utility model
The above problem is not only efficiently solved, while also having the advantages that promote the transmission capacity of distribution line.
The operating process of the utility model is described in detail below：
A kind of power distribution network compensation circuit, including series capacitor compensation circuit and shunt reactor compensation circuit.
Wherein, series capacitor compensation circuit is connected in series in distribution line, and shunt reactor compensation circuit is connected in parallel
In circuit.Meanwhile shunt reactor compensation circuit is connected in the load-side of distribution line in parallel；Series capacitor compensation circuit
It is connected to the mains side of distribution line.
Series capacitor compensation circuit is by being connected on the capacitor C1 of distribution line, metal oxide pressure-limiting device MOV, damping
The compositions such as resistance R, damping reactor L1, circuit breaker Q F, the first vacuum contactor KM1, control unit.Wherein, capacitor C1 is carried
For compensating capacitive reactance；Metal oxide pressure-limiting device MOV is used for when line fault, provides the impedance path of fault current, is protected
Capacitor C1；Damping resistance R and damping reactor L1 collectively constitute damping circuit, for the fault current when line fault is discharged
Impact to other components；Circuit breaker Q F is cut-off for damping circuit；First vacuum contactor KM1 is for series compensation electricity
The bypass on road；Control unit is used for the control of entire series compensation circuit.Series capacitor compensation circuit is for solving distribution wire
The problem of road terminal voltage seriously reduces.
Shunt reactor compensation circuit is by the second vacuum contactor KM2, third vacuum contactor KM3 and is connected to distribution
The first reactor L2 on circuit and the second reactor L3 compositions.Wherein, the second vacuum contactor KM2 and third vacuum contactor
KM3 is respectively used to the switching of the first reactor L2 and the second reactor L3；The capacity of first reactor L2 and the second reactor L3
It is equal, and be 0.01p.u.~20p.u. of capacitor C1 capacity.Shunt reactor compensation circuit is light for solving distribution line
Compensation effect problem not up to standard when load.Alternatively, shunt reactor compensation circuit is made of REgulatable reactor L, REgulatable reactor L
One end ground connection, the other end is connected to distribution line.
Claims (6)
1. a kind of power distribution network series and parallel circuit, which is characterized in that including series capacitor compensation circuit and shunt reactor
Compensation circuit, the series capacitor compensation circuit are connected in series in the mains side in distribution line, and the shunt reactor is mended
Repay the load-side that circuit in parallel is connected to distribution line.
2. a kind of power distribution network series and parallel circuit according to claim 1, which is characterized in that the series capacitor is mended
It includes capacitor C1, metal oxide pressure-limiting device MOV, damping reactor L1, damping resistance R, circuit breaker Q F and to repay circuit
One vacuum contactor KM1, the capacitor C1 are connected in distribution line, and metal oxide pressure-limiting device MOV and the first vacuum connect
Tentaculum KM1 is in parallel with capacitor C1, and one end of capacitor C1 is connected with one end of damping reactor L1 and damping resistance R, damping
The other end of reactor L1 and damping resistance R are connected to the other end of capacitor C1 by circuit breaker Q F.
3. a kind of power distribution network series and parallel circuit according to claim 2, which is characterized in that the shunt reactor is mended
It is reactor grouping switching type or tunable reactor type to repay circuit.
4. a kind of power distribution network series and parallel circuit according to claim 3, which is characterized in that when shunt reactor compensates
When circuit is reactor grouping switching type, the shunt reactor compensation circuit includes the first reactor L2 and the second reactor
One end of L3, the first reactor L2 are grounded, and the other end is connected to distribution line by the second vacuum contactor KM2；Second reactance
One end of device L3 is grounded, and the other end is connected to distribution line by third vacuum contactor KM3.
5. a kind of power distribution network series and parallel circuit according to claim 4, which is characterized in that the first reactor L2 and
The capacity of two reactor L3 is equal, and the 0.01p.u. that the capacity of the first reactor L2 and the second reactor L3 are capacitor C1~
20p.u.。
6. a kind of power distribution network series and parallel circuit according to claim 3, which is characterized in that when shunt reactor compensates
When circuit is tunable reactor type, the shunt reactor compensation circuit includes REgulatable reactor L, one end of REgulatable reactor L
Ground connection, the other end are connected to distribution line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721746318.XU CN207705793U (en) | 2017-12-14 | 2017-12-14 | A kind of power distribution network series and parallel circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721746318.XU CN207705793U (en) | 2017-12-14 | 2017-12-14 | A kind of power distribution network series and parallel circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207705793U true CN207705793U (en) | 2018-08-07 |
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ID=63026210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721746318.XU Active CN207705793U (en) | 2017-12-14 | 2017-12-14 | A kind of power distribution network series and parallel circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207705793U (en) |
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2017
- 2017-12-14 CN CN201721746318.XU patent/CN207705793U/en active Active
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