CN206340970U - A kind of series compensation equipment protection system of parallel-connection structure - Google Patents

A kind of series compensation equipment protection system of parallel-connection structure Download PDF

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Publication number
CN206340970U
CN206340970U CN201621425023.8U CN201621425023U CN206340970U CN 206340970 U CN206340970 U CN 206340970U CN 201621425023 U CN201621425023 U CN 201621425023U CN 206340970 U CN206340970 U CN 206340970U
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CN
China
Prior art keywords
series
protection system
compensation equipment
parallel
transformer
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Active
Application number
CN201621425023.8U
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Chinese (zh)
Inventor
鲁江
邱德锋
姜崇学
张宝顺
潘磊
黄如海
刘永刚
卢宇
董云龙
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NR Electric Co Ltd
NR Engineering Co Ltd
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NR Electric Co Ltd
NR Engineering Co Ltd
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Priority to CN201621425023.8U priority Critical patent/CN206340970U/en
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Publication of CN206340970U publication Critical patent/CN206340970U/en
Active legal-status Critical Current
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Abstract

The utility model proposes a kind of series compensation equipment protection system of parallel-connection structure; spark gap and by-pass switch are connect in series transformer winding terminal span; after failure generation, before by-pass switch combined floodgate; when overvoltage occurs in series compensation equipment; spark gap reaches that definite value is acted; series transformer winding is bypassed, overvoltage protection is carried out to equipment.The spark gap and by-pass switch of the protection system are cooperated, and protection is coordinated to equipment overvoltage, are prevented that overvoltage stress from continuing to develop, are improved the overall reliability of equipment.

Description

A kind of series compensation equipment protection system of parallel-connection structure
Technical field
The utility model belongs to electric and electronic technical field in power system, and in particular to a kind of series connection of parallel-connection structure is mended Repay equipment protection system.
Background technology
STATCOM uses voltage source converter, main electric power electronic component therein, electric capacity relative to The equipment such as transformer, reactor, circuit are to overvoltage quite sensitive.
For the engineering of actual motion, overvoltage is the significant threat of converter valve, the device of valve group, capacitance overvoltage ability It is limited.The overvoltage of Microsecond grade this may result in the damage of device.For power electronic devices, control circuit or internal fault It may all cause equipment to be in charged state, capacitance voltage constantly rises, ultimately cause the blast of device overvoltage.To protect other Partly, blast is prevented, the influence to whole valve group and system is reduced, it is necessary in time failure removal.Mechanical bypass switch it is dynamic The regular hour is needed, charging current may cause voltage further to raise within this time, it is therefore desirable to equipment in addition Quickly cut off failure.
The alternating current-direct current power network overvoltage that time is extremely short, amplitude is high, such as switching overvoltage, lightning surge typically can not be only Protected by protection system, it is necessary to by rational pressure-resistant design, such as configure spark gap and prevented.But spark gap Actuation time it is relatively short, accordingly, it would be desirable to for protection system and the advantage and disadvantage of spark gap, formulating a kind of more quickly has The protection system of effect, can prevent that overvoltage stress from continuing to send out in system disturbance, module failure or alternating current-direct current power network overvoltage Exhibition, improves the reliability of transverter.
Utility model content
The purpose of this utility model, is the series compensation equipment protection system for providing a kind of parallel-connection structure, ensure that Equipment can be acted reliably, protection equipment is not by overvoltage in system disturbance, module failure or alternating current-direct current power network overvoltage Stress and damage.
In order to achieve the above object, solution of the present utility model is:
A kind of series compensation equipment protection system of parallel-connection structure, the protection system of the series compensation equipment includes series connection Transformer, by-pass switch and spark gap,
The spark gap and by-pass switch of bridging are configured at series transformer line side winding two ends, both are in parallel;
Spark gap and by-pass switch coordinate, and protect the safety of series compensation equipment.
As further preferred scheme of the present utility model, when the configuration series transformer line side winding two ends across When the level of protection of the spark gap connect can not protect series compensation equipment, configuration is connected across the other side windings of series transformer The spark gap at two ends.
As further preferred scheme of the present utility model, in the other side winding two ends configuration bridgings of the series transformer By-pass switch.
As further preferred scheme of the present utility model, the other sides of series transformer use star-star connection mode, Or use delta connection mode.
As further preferred scheme of the present utility model, the other side windings of series transformer use star-star connection During mode, the series transformer increase balance winding.
As further preferred scheme of the present utility model, the other side windings of series transformer use star-star connection side During formula, neutral-point solid ground or resistance grounded.
As further preferred scheme of the present utility model, the series transformer include balance winding when, balance around Group two ends do not configure the spark gap of bridging.
As further preferred scheme of the present utility model, wherein one end of the series transformer balance winding directly connects Ground.
As further preferred scheme of the present utility model, at least one end of the balance winding of the series transformer is through fire Flower gap ground.
The beneficial effects of the utility model, are the series compensation equipment protection system for providing a kind of parallel-connection structure, can Ensure that equipment, in system disturbance, module failure or alternating current-direct current power network overvoltage, can be acted reliably, protection equipment has not been received Voltage stress and damage, the reliability overall so as to improve equipment is suitable for engineer applied.
Brief description of the drawings
Fig. 1 is that (series transformer low-pressure side is added using star connection for the protection system of the utility model series compensation equipment Balance the mode of connection of winding) structure chart;
Fig. 2 is that (series transformer low-pressure side is added using star connection for the protection system of the utility model series compensation equipment Balance the mode of connection of winding) structure chart, other side winding two ends configure spark gap;
Fig. 3 is that (series transformer low-pressure side is added using star connection for the protection system of the utility model series compensation equipment Balance the mode of connection of winding) structure chart, other side winding two ends configure by-pass switch;
Fig. 4 is that (series transformer low-pressure side is connect using triangle for the protection system of the utility model series compensation equipment Line mode) structure chart;
Fig. 5 is balance winding connection mode figure, has one end to be directly grounded;
Fig. 6 is balance winding connection mode figure, and at least one end is grounded through spark gap;
Fig. 7 is delta connection mode figure.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings.
The utility model proposes a kind of series compensation equipment protection system of parallel-connection structure, as shown in figure 1, the series connection The protection system of equipment is compensated including but not limited to series transformer, by-pass switch and spark gap, in series transformer circuit The spark gap and by-pass switch of side winding two ends configuration bridging, both are in parallel;Spark gap and by-pass switch coordinate, protection string The safety of connection compensation equipment.
When the level of protection for the spark gap that the series transformer line side winding two ends of the configuration are bridged can be protected During series compensation equipment, the spark gap installed in the other side winding two ends of series transformer can not be configured, as shown in Figure 1.
When the level of protection for the spark gap that the series transformer line side winding two ends of the configuration are bridged can not be protected When protecting series compensation equipment, configuration is connected across the spark gap at the other side winding two ends of series transformer, as shown in Figure 2.
The by-pass switch that can also be bridged in the other side winding two ends configurations of the series transformer, if configuration peace simultaneously Spark gap mounted in the other side winding two ends of series transformer, then by-pass switch is with being arranged on the other side windings of series transformer The spark gap at two ends is in parallel, further improves the reliability of protection system, as shown in Figure 3.
The other sides of series transformer can use star-star connection mode, it would however also be possible to employ delta connection mode, such as scheme 4th, shown in Fig. 7.
When the other side windings of series transformer use star-star connection mode, series transformer increase balance around Group, as shown in Figure 5.
When the other side windings of series transformer use star-star connection mode, neutral point can be directly grounded or through resistance Ground connection, as shown in Figure 5.
When the series transformer includes balance winding, balance winding two ends do not configure the spark gap of bridging.
Wherein one end of the series transformer balance winding is directly grounded.As shown in Figure 5.
At least one end of the balance winding of the series transformer is grounded through spark gap, further improves protection system Reliability, as shown in Figure 6.
Finally it should be noted that:Only illustrate the technical solution of the utility model with reference to above-described embodiment rather than it is limited System.Those of ordinary skill in the art are to be understood that:Those skilled in the art can be to specific implementation of the present utility model Mode is modified or equivalent, but these modifications or change are being applied within pending patent requirements protection domain..

Claims (9)

1. a kind of series compensation equipment protection system of parallel-connection structure, it is characterised in that:The protection system of the series compensation equipment System includes series transformer, by-pass switch and spark gap,
The spark gap and by-pass switch of bridging are configured at series transformer line side winding two ends, both are in parallel;
Spark gap and by-pass switch coordinate, and protect the safety of series compensation equipment.
2. the series compensation equipment protection system of a kind of parallel-connection structure as claimed in claim 1, it is characterised in that match somebody with somebody when described When the level of protection of the spark gap for the series transformer line side winding two ends bridging put can not protect series compensation equipment, Configuration is connected across the spark gap at the other side winding two ends of series transformer.
3. the series compensation equipment protection system of a kind of parallel-connection structure as claimed in claim 1, it is characterised in that in the string Join the by-pass switch of the other side winding two ends configuration bridgings of transformer.
4. a kind of series compensation equipment protection system of parallel-connection structure as claimed in claim 1, it is characterised in that the series connection The other sides of transformer use star-star connection mode, or use delta connection mode.
5. a kind of series compensation equipment protection system of parallel-connection structure as claimed in claim 4, it is characterised in that the series connection When the other side windings of transformer use star-star connection mode, the series transformer increase balance winding.
6. a kind of series compensation equipment protection system of parallel-connection structure as claimed in claim 4, it is characterised in that the series connection When the other side windings of transformer use star-star connection mode, neutral-point solid ground or resistance grounded.
7. a kind of series compensation equipment protection system of parallel-connection structure as claimed in claim 5, it is characterised in that the series connection When transformer includes balance winding, balance winding two ends do not configure the spark gap of bridging.
8. a kind of series compensation equipment protection system of parallel-connection structure as claimed in claim 5, it is characterised in that the series connection Wherein one end of transformer balance winding is directly grounded.
9. a kind of series compensation equipment protection system of parallel-connection structure as claimed in claim 5, it is characterised in that the series connection At least one end of the balance winding of transformer is grounded through spark gap.
CN201621425023.8U 2016-12-22 2016-12-22 A kind of series compensation equipment protection system of parallel-connection structure Active CN206340970U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621425023.8U CN206340970U (en) 2016-12-22 2016-12-22 A kind of series compensation equipment protection system of parallel-connection structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621425023.8U CN206340970U (en) 2016-12-22 2016-12-22 A kind of series compensation equipment protection system of parallel-connection structure

Publications (1)

Publication Number Publication Date
CN206340970U true CN206340970U (en) 2017-07-18

Family

ID=59301585

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201621425023.8U Active CN206340970U (en) 2016-12-22 2016-12-22 A kind of series compensation equipment protection system of parallel-connection structure

Country Status (1)

Country Link
CN (1) CN206340970U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108233354A (en) * 2016-12-22 2018-06-29 南京南瑞继保电气有限公司 A kind of series compensation equipment protection system of parallel-connection structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108233354A (en) * 2016-12-22 2018-06-29 南京南瑞继保电气有限公司 A kind of series compensation equipment protection system of parallel-connection structure

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