CN207082850U - Suitable for the TCR and DC ice melting switching device of 500KV transformer stations - Google Patents
Suitable for the TCR and DC ice melting switching device of 500KV transformer stations Download PDFInfo
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- CN207082850U CN207082850U CN201721086466.3U CN201721086466U CN207082850U CN 207082850 U CN207082850 U CN 207082850U CN 201721086466 U CN201721086466 U CN 201721086466U CN 207082850 U CN207082850 U CN 207082850U
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
Abstract
The utility model discloses a kind of TCR and DC ice melting switching device suitable for 500KV transformer stations, and it includes two groups of step-down transformers, it is characterised in that：35kV ac bus is divided into two-way and is connected to two groups of 13kV ac bus sides through two groups of step-down transformers；Two branch roads are connected with below every 13kV bus bar side, tie point is connected in three groups of thyristor groups；Second branch road You Liangge branches, first branch are connected in three groups of thyristor groups by three groups of reactors, and second branch is connected on ice-melt dc bus；Three groups of thyristor groups below two 13kV bus bar sides are connected with each other by two disconnecting switch 1G3 and 2G3；It is complicated to solve TCR and the DC ice melting switching device of prior art, for the technical problem such as the utilization rate of device in itself is low.
Description
Technical field
The utility model belongs to technical field of power systems, more particularly to a kind of TCR suitable for 500KV transformer stations with it is straight
Flow ice-melt switching device.
Background technology：
The low temperature sleet and snow ice natural calamity that winter often has can bring great destruction to transmission line of electricity, have a strong impact on electricity
The normal operation of net.After 2008 ice damage, actively research line ice-melting problem, the six arteries and veins direct currents mainly used at present melt for country
Ice production apparatus achieves relatively good effect.Six arteries and veins DC de-icing devices are to be reached using DC current by producing heat on wire
The effect of ice-melt, but six Pulses Rectifiers can produce 5 times, 7 inferior harmonic waves in use, and power network is polluted.And
12 pulsating wave rectifier can eliminate 5 times, 7 inferior harmonic waves, greatly reduce the harmonic content of power network weight.In addition, deicing device is such as
Fruit is only single to be used for that ice-melt may there is equipment to be chronically at the problem of shelving state, it is impossible to makes full use of equipment to provide
Source, cause the waste of resource.In order to improve the utilization rate of equipment, the equipment fully with reference to deicing device, brainstrust proposes directly
Ice-melt and TCR multiplexers are flowed, also devises various structures, but it is complicated, it is not high for the utilization rate of device in itself.
Utility model content：
The technical problems to be solved in the utility model：A kind of TCR suitable for 500KV transformer stations is provided to cut with DC ice melting
Changing device, it is complicated with DC ice melting switching device to solve the TCR of prior art, it is low etc. for the utilization rate of device in itself
Technical problem.
Technical solutions of the utility model：
A kind of TCR and DC ice melting switching device suitable for 500KV transformer stations, it includes two groups of step-down transformers,
35kV ac bus is divided into two-way and is connected to two groups of 13kV ac bus sides through two groups of step-down transformers；In every 13kV bus bar side
Lower section is connected with two branch roads, and tie point is connected in three groups of thyristor groups；Second branch road You Liangge branches, first branch
It is connected to by three groups of reactors in three groups of thyristor groups, second branch is connected on ice-melt dc bus；Two mothers 13kV
Three groups of thyristor groups below line side are connected with each other by two disconnecting switch 1G3 and 2G3.
First via 35kV ac bus is connected by 1# transformers with first group of 13kV ac bus, first group of 13kV exchange
Tie point below bus bar side is connected by disconnecting switch 1GS1 with three groups of thyristor groups, and the second branch road passes through disconnecting switch
It is divided into Liang Ge branches after 1GS2, first branch is connected by three groups of reactors with three groups of thyristor groups；Second branch passes through
Again by being connected respectively with ice-melt wire LA and LB after disconnecting switch 1S1 and 1S2 after disconnecting switch 1G2；
Second road 35kV ac bus is connected by 2# transformers with second group of 13kV ac bus, second group of 13kV exchange
Tie point below bus bar side is connected by disconnecting switch 2GS1 with three groups of thyristor groups, and the second branch road passes through disconnecting switch
It is divided into Liang Ge branches after 2GS2, first branch is connected by three groups of reactors with three groups of thyristor groups；Second branch passes through
Again by being connected respectively with ice-melt wire LC and LB after disconnecting switch 2S1 and 2S2 after disconnecting switch 2G2.
Disconnecting switch is parallel with each group of three groups of IGCTs.
The beneficial effects of the utility model：
The utility model can either realize DC ice melting and TCR multiplexing, improve the utilization rate of equipment, while can be significantly
Improve the utilization rate of component；The component that the utility model needs is few, and when realizing DC ice melting, thyristor groups form 12 pulse waves
Rectifier, inductance is as flat ripple inductance；When realizing TCR, reverse parallel connection, cooperation inductance, formation controllable type are electric two-by-two for thyristor groups
Anti- device TCR, realizes the reactive-load compensation to system., can using 12 Pulses Rectifiers and filter condenser group under DC ice melting pattern
With less system harmonicses content, power grid quality is improved；The TCR and DC ice melting switching device structure for solving prior art are answered
It is miscellaneous, for the technical problem such as the utilization rate of device in itself is low.
Brief description of the drawings：
Fig. 1 is electrical block diagram of the present utility model；
Fig. 2 is two sets of TCR structural representation；
Fig. 3 is the topology diagram of DC ice melting；
Fig. 4 is the on off state schematic diagram under two kinds of different working modes of the utility model.
Embodiment：
A kind of TCR and DC ice melting switching device suitable for 500KV transformer stations, it includes two groups of step-down transformers,
35kV ac bus is divided into two-way and is connected to two groups of 13kV ac bus sides through two groups of step-down transformers；In every 13kV bus bar side
Lower section is connected with two branch roads, and tie point is connected in three groups of thyristor groups；Second branch road You Liangge branches, first branch
It is connected to by three groups of reactors in three groups of thyristor groups, second branch is connected on ice-melt dc bus；Two mothers 13kV
Three groups of thyristor groups below line side are connected with each other by two disconnecting switch 1G3 and 2G3.
First via 35kV ac bus is connected by 1# transformers with first group of 13kV ac bus, first group of 13kV exchange
Tie point below bus bar side is connected by disconnecting switch 1GS1 with three groups of thyristor groups, and the second branch road passes through disconnecting switch
It is divided into Liang Ge branches after 1GS2, first branch is connected by three groups of reactors with three groups of thyristor groups；Second branch passes through
Again by being connected respectively with ice-melt wire LA and LB after disconnecting switch 1S1 and 1S2 after disconnecting switch 1G2；
Second road 35kV ac bus is connected by 2# transformers with second group of 13kV ac bus, second group of 13kV exchange
Tie point below bus bar side is connected by disconnecting switch 2GS1 with three groups of thyristor groups, and the second branch road passes through disconnecting switch
It is divided into Liang Ge branches after 2GS2, first branch is connected by three groups of reactors with three groups of thyristor groups；Second branch passes through
Again by being connected respectively with ice-melt wire LC and LB after disconnecting switch 2S1 and 2S2 after disconnecting switch 2G2.
Disconnecting switch is parallel with each group of three groups of IGCTs.
Three groups of thyristor groups of first group of 13kV ac bus side-lower disconnecting switch in parallel be 1GS3a, 1GS3b with
1GS3c；
Three groups of thyristor groups of second group of 13kV ac bus side-lower disconnecting switch in parallel be 2GS3a, 2GS3b with
2GS3c。
Below in conjunction with the accompanying drawings to the utility model to technical scheme further instruction：
As Figure 1-3, the utility model includes step-down transformer, thyristor groups, reactor, to be connected to 35kV exchanges female
Fixed capacity wave filter group on line；Described 35kV ac bus is divided into two-way, and being connected to two 13kV via two transformers hands over
Flow bus bar side.2 branch roads are connected with below every 13kV bus bar side, tie point is connected in 3 groups of thyristor groups；Second
Road You Liangge branches, first branch are connected in 3 groups of thyristor groups by three groups of reactors, second branch, pass through isolation
Switch, is connected on ice-melt dc bus.3 groups of thyristor groups below two 13kV bus bar sides are mutually interconnected by two disconnecting switch
Connect.Three groups of thyristor groups, reactor below every 13kV bus bar side are combined by the different break-makes of disconnecting switch group, can be with
Form six Pulses Rectifiers suitable for DC ice melting and the controllable type reactor TCR suitable for dynamic passive compensation.
Two transformers are respectively designed to two kinds of different connected modes, i.e. △/△ and △/Y so that rectifier transformer is former
Secondary two polygonal voltages form different phase shift, and two six Pulses Rectifiers can be with 12 arteries and veins in series suitable for level high
Ripple rectifier, the harmonic wave of AC can be reduced.
The switching mode under two kinds of mode of operations is described in detail below in conjunction with the accompanying drawings.
（1）DC ice melting pattern
DC ice melting is that exchange is become into direct current by rectifier, and the effect that heat reaches ice-melt is produced when flowing through wire.
Such as Fig. 1, under DC ice melting pattern, ice-melt dc bus has three, respectively LA, LB, LC.Disconnecting switch 1GS1,
1G2,1G3,1G4,2GS1,2G2,2G3,2G4 are closed, and 1GS2,1GS3,2GS2,2GS3 disconnect, and device forms 12 pulse wave three-phase bridges
Formula all controlled rectifier circuit, by the shut-off for controlling disconnecting switch 1S1,1S2,1S3,1S4 so that three ice-melt dc bus pass through
DC current.
（2）Dynamic passive compensation pattern
Cooperated by controllable type reactor TCR and the wave filter for being connected to bus bar side, dynamic regulation TCR IGCTs
Trigger Angle realizes the dynamic passive compensation of system.
Under TCR patterns, the rectifier under DC ice melting pattern realizes playing a reversed role for IGCT by controlling disconnecting switch group
Parallel connection, and the reactor under DC ice melting pattern is connected, form 2 sets of TCR.It is specific as follows：
For the loop under 1# transformers, 1GS1,1GS2,1GS3 are closed, disconnects 1G2,1G3,1G4, IGCT is anti-two-by-two
To parallel connection, linked reactor, the continuously adjustable reactor under dynamic passive compensation pattern is formed.The fixation being connected on bus
Capacitive filter provides capacitive reactive power compensation, and filters out harmonic wave caused by TCR, and both are cooperated, and idle benefit is provided for system
Repay.
For the loop under 2# transformers, similarly, 2GS1,2GS2,2GS3 are closed, disconnect 2G2,2G3,2G4, make system work
Make under dynamic passive compensation pattern.
The utility model is simple in construction, and control is flexible, has both solved the idleness of equipment under the conditions of the single function of device, utilization rate
The problem of low, the element of device is decreased, improve the utilization rate of element, it is economical, reliable.By controlling disconnecting switch group,
The switching of two kinds of mode of operations can conveniently be realized.
Claims (4)
1. a kind of TCR and DC ice melting switching device suitable for 500KV transformer stations, it includes two groups of step-down transformers, and it is special
Sign is：35kV ac bus is divided into two-way and is connected to two groups of 13kV ac bus sides through two groups of step-down transformers；At every
Two branch roads are connected with below 13kV bus bar sides, tie point is connected in three groups of thyristor groups；Second branch road You Liangge branches,
First branch is connected in three groups of thyristor groups by three groups of reactors, and second branch is connected on ice-melt dc bus；
Three groups of thyristor groups below two 13kV bus bar sides are connected with each other by two disconnecting switch 1G3 and 2G3.
2. a kind of TCR and DC ice melting switching device suitable for 500KV transformer stations according to claim 1, its feature
It is：First via 35kV ac bus is connected by 1# transformers with first group of 13kV ac bus, and first group of 13kV exchange is female
Tie point below line side is connected by disconnecting switch 1GS1 with three groups of thyristor groups, and the second branch road passes through disconnecting switch 1GS2
After be divided into Liang Ge branches, first branch is connected by three groups of reactors with three groups of thyristor groups；Second branch passes through isolation
Again by being connected respectively with ice-melt wire LA and LB after disconnecting switch 1S1 and 1S2 after switch 1G2.
3. a kind of TCR and DC ice melting switching device suitable for 500KV transformer stations according to claim 1, its feature
It is：Second road 35kV ac bus is connected by 2# transformers with second group of 13kV ac bus, and second group of 13kV exchange is female
Tie point below line side is connected by disconnecting switch 2GS1 with three groups of thyristor groups, and the second branch road passes through disconnecting switch 2GS2
After be divided into Liang Ge branches, first branch is connected by three groups of reactors with three groups of thyristor groups；Second branch passes through isolation
Again by being connected respectively with ice-melt wire LC and LB after disconnecting switch 2S1 and 2S2 after switch 2G2.
4. a kind of TCR and DC ice melting switching device suitable for 500KV transformer stations according to claim 1, its feature
It is：Disconnecting switch is parallel with each group of three groups of IGCTs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721086466.3U CN207082850U (en) | 2017-08-28 | 2017-08-28 | Suitable for the TCR and DC ice melting switching device of 500KV transformer stations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721086466.3U CN207082850U (en) | 2017-08-28 | 2017-08-28 | Suitable for the TCR and DC ice melting switching device of 500KV transformer stations |
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| Publication Number | Publication Date |
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| CN207082850U true CN207082850U (en) | 2018-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721086466.3U Active CN207082850U (en) | 2017-08-28 | 2017-08-28 | Suitable for the TCR and DC ice melting switching device of 500KV transformer stations |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113036800A (en) * | 2021-05-06 | 2021-06-25 | 贵州电网有限责任公司 | Flexible interconnected transformer substation structure and control method |
-
2017
- 2017-08-28 CN CN201721086466.3U patent/CN207082850U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113036800A (en) * | 2021-05-06 | 2021-06-25 | 贵州电网有限责任公司 | Flexible interconnected transformer substation structure and control method |
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