CN107666144A - A kind of overvoltage protection suitable for flexible ring net controller - Google Patents
A kind of overvoltage protection suitable for flexible ring net controller Download PDFInfo
- Publication number
- CN107666144A CN107666144A CN201610616034.2A CN201610616034A CN107666144A CN 107666144 A CN107666144 A CN 107666144A CN 201610616034 A CN201610616034 A CN 201610616034A CN 107666144 A CN107666144 A CN 107666144A
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- China
- Prior art keywords
- voltage
- terminal
- overvoltage protection
- flexible ring
- ring net
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
Abstract
The invention provides a kind of overvoltage protection suitable for flexible ring net controller, including first voltage limiter, current breaker and Voltage measure；First voltage limiter is connected between the first ac terminal of flexible ring net controller and the second ac terminal；Voltage measure, for measuring the power-frequency voltage component amplitude between the first ac terminal and the second ac terminal；Current breaker is in parallel with first voltage limiter, for the rated alternating current between the ac terminal of disjunction first and the second ac terminal.Compared with prior art; a kind of overvoltage protection suitable for flexible ring net controller provided by the invention; switching overvoltage, lightning surge and the power-frequency overvoltage at flexible loop network control both ends can effectively be suppressed, improve its operational reliability and security.
Description
Technical field
The present invention relates to Power System and its Automation technical field, and in particular to one kind is applied to flexible ring net controller
Overvoltage protection.
Background technology
Flexible ring net controller is that solve the problems, such as that modern AC power network short circuit currents are excessive and the pass of electromagnetic looped network off-the-line
Button apparatus.When short trouble occurs for AC system, it can block the circulation path of fault current and isolated fault, so as to carry
The stability of high power network and the flexibility for increasing operation of power networks.
It is abnormal that flexible ring net controller may face power-frequency overvoltage, switching overvoltage and lightning surge etc. in operation
Operating mode.Generally use is suppressed based on the overvoltage protection of Oxide Arrester to these overvoltage at present, but this
The overvoltage tolerance of overvoltage protection is relatively low, it is impossible to effectively suppresses power-frequency overvoltage, switching overvoltage and thunder and lightning mistake.
The content of the invention
In order to meet the needs of prior art, the invention provides a kind of overvoltage protection of flexible ring net controller dress
Put.
The technical scheme is that：
The flexible ring net controller includes the first ac terminal and the second ac terminal, the overvoltage protection bag
Include first voltage limiter, current breaker and Voltage measure；
The first voltage limiter is connected between first ac terminal and the second ac terminal；
The Voltage measure, for measuring the power-frequency voltage between first ac terminal and the second ac terminal point
Measure amplitude UHZ；
The current breaker is in parallel with the first voltage limiter, for the first ac terminal and second described in disjunction
Rated alternating current between ac terminal.
The present invention further provides optimal technical scheme be：
Rated alternating current between the ac terminal of current breaker disjunction first and the second ac terminal includes：
As the power-frequency voltage component amplitude UHZWith first threshold voltage UthRatio reach predetermined value after close the electricity
Breaker is flowed, suppresses power-frequency overvoltage.
The present invention further provides optimal technical scheme be：
The first threshold voltage UthRestrictive condition include：
Wherein, UHZmaxThe power-frequency voltage component amplitude U is resistant to for the flexible ring net controllerHZMaximum.
The present invention further provides optimal technical scheme be：The overvoltage protection also includes second voltage and limited
Device and tertiary voltage limiter；
One end of the second voltage limiter is connected with the first voltage limiter, other end ground connection；Described 3rd
One end of voltage limitator is connected with the first voltage limiter, other end ground connection.
The present invention further provides optimal technical scheme be：
The second voltage limiter includes nonlinear resistor, linear resistor or straightline capacitor；
The tertiary voltage limiter includes nonlinear resistor, linear resistor or straightline capacitor.
The present invention further provides optimal technical scheme be：
The first voltage limiter includes nonlinear resistor or capacitor.
The present invention further provides optimal technical scheme be：
The first voltage limiter, second voltage limiter and tertiary voltage limiter include ZnO resistors device.
The present invention further provides optimal technical scheme be：
The current breaker includes breaker.
The present invention further provides optimal technical scheme be：
It is mutual that the Voltage measure includes capacitance type potential transformer, Resistive Voltage Transformer, resistance-capacitance differential pressure type voltage
Sensor or all -fiber formula voltage transformer.
The present invention further provides optimal technical scheme be：
The overvoltage protection also includes a display module；
The display module is connected with current breaker, for prompting rated alternating current described in current breaker disjunction.
Compared with immediate prior art, the beneficial effects of the invention are as follows：
1st, a kind of overvoltage protection suitable for flexible ring net controller provided by the invention, by monitoring flexible ring
Power-frequency voltage component amplitude in net controller between two ac terminals, driving current breaker closure, it is possible to achieve power frequency
The insulation safety of flexible ring net controller under overvoltage；
2nd, a kind of overvoltage protection suitable for flexible ring net controller provided by the invention, by comparing power frequency electric
Press component amplitude UHZWith first threshold voltage Uth, power-frequency overvoltage can effectively be suppressed, and improve flexible loop network control
The power-frequency overvoltage tolerance of device；
3rd, a kind of overvoltage protection suitable for flexible ring net controller provided by the invention, can be to flexible looped network
Switching overvoltage, lightning surge and the power-frequency overvoltage at control both ends are effectively suppressed, and improve its operational reliability and peace
Quan Xing.
Brief description of the drawings
Fig. 1：A kind of overvoltage protection topology schematic diagram suitable for flexible ring net controller in the embodiment of the present invention；
Fig. 2：Another overvoltage protection topology signal for being applied to flexible ring net controller in the embodiment of the present invention
Figure；
In figure, 100：Flexible ring net controller；101：First ac terminal；102：Second ac terminal；201：First electricity
Press limiter；202：Second voltage limiter；203：Tertiary voltage limiter；204：Current breaker；205：Voltage measure.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely illustrated, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Separately below with reference to accompanying drawing, to a kind of overvoltage suitable for flexible ring net controller provided in an embodiment of the present invention
Protection device illustrates.
Fig. 1 and Fig. 2 is that the overvoltage protection topology of two kinds of flexible ring net controllers provided in an embodiment of the present invention is shown
It is intended to, as illustrated, flexible ring net controller 100 includes two ac terminals, i.e. the first ac terminal 101 exchanges end with second
Son 102.Overvoltage protection is arranged between the first ac terminal 101 and the second ac terminal 102 in the present embodiment, including
First voltage limiter 201, current breaker 204 and Voltage measure 205.Wherein,
First voltage limiter 201 is connected between the first ac terminal 101 and the second ac terminal 102, can be used for
Suppress switching overvoltage and lightning surge that the both ends of flexible ring net controller 100 occur.
Voltage measure 205, the instantaneous voltage between the first ac terminal 101 and the second ac terminal 102 can be measured,
It can be used for measuring the power-frequency voltage component amplitude U between the first ac terminal 101 and the second ac terminal 102HZ。
Current breaker 204 is in parallel with first voltage limiter 201, is handed over for the first ac terminal of disjunction 101 and second
Flow the rated alternating current between terminal 102.
By monitoring the power-frequency voltage component between the first ac terminal 101 and the second ac terminal 102 in the present embodiment
Amplitude, driving current breaker 205 close, it is possible to achieve the insulation safety of flexible ring net controller 100 under power-frequency overvoltage.
Further, current breaker 204 of the present invention is using following method disjunction rated alternating currents.
More above-mentioned power-frequency voltage component amplitude UHZWith first threshold voltage Uth：As power-frequency voltage component amplitude UHZWith
One threshold voltage UthRatio reach closed path breaker 204 after predetermined value, suppress power-frequency overvoltage.
First threshold voltage U in the present embodimentthRestrictive condition include：
Wherein, UHZmaxPower-frequency voltage component amplitude U can be resistant to for flexible ring net controller 100HZMaximum.
By comparing power-frequency voltage component amplitude U in the present embodimentHZWith first threshold voltage Uth, can be excessively electric to power frequency
Pressure is effectively suppressed, and improves the power-frequency overvoltage tolerance of flexible ring net controller.
Further, overvoltage protection provided by the invention can also include following topological structures.
Overvoltage protection also includes second voltage limiter 202 and tertiary voltage limiter 203 in the present embodiment, can
For suppressing the power-frequency overvoltage over the ground of flexible ring net controller 100.Wherein,
One end of second voltage limiter 202 is connected with first voltage limiter 201, other end ground connection.First voltage limits
Device 201 processed uses nonlinear resistor or capacitor, and second voltage limiter 202 can use nonlinear resistor or linear electricity
Hinder device or straightline capacitor.
One end of tertiary voltage limiter 203 is connected with first voltage limiter 201, other end ground connection.First voltage limits
Device 201 processed uses nonlinear resistor or capacitor, and tertiary voltage limiter 203 can use nonlinear resistor or linear electricity
Hinder device or straightline capacitor.
The reference voltage of nonlinear resistor needs at least to meet following 2 technical requirements in the present embodiment：First, flow through
The electric current of nonlinear resistor is less than 10mA, second, not occurring when maximum power-frequency overvoltage occurs in flexible ring net controller 100
Thermal breakdown.
In the preferred scheme for the overvoltage protection that the present embodiment provides, nonlinear resistor possesses monotonic increase
Voltage-current relation, therefore first voltage limiter 201 in the present embodiment, second voltage limiter 202 and tertiary voltage limit
Device 203 processed uses ZnO resistors device.
In the preferred scheme for another overvoltage protection that the present embodiment provides, current breaker 204 is using open circuit
Device.
In the preferred scheme for another overvoltage protection that the present embodiment provides, Voltage measure 205 uses electric capacity
Formula voltage transformer or Resistive Voltage Transformer or resistance-capacitance differential pressure type voltage transformer or all -fiber formula voltage transformer.
Further, overvoltage protection provided by the invention can also include following topological structures.
Overvoltage protection also includes a display module in the present embodiment, wherein,
Display module is connected with current breaker 204, for prompting the first ac terminal of disjunction 101 of current breaker 204
With the rated alternating current between the second ac terminal 102.
Overvoltage protection when accessing different voltage class power networks below with the flexible ring net controller shown in Fig. 1 and 2
Structure and parameter design illustrate.
The first ac terminal 101 and the second ac terminal 102 of flexible ring net controller shown in Fig. 1 100 are respectively connected to
220kV ac bus.The power-frequency overvoltage of 220kV AC networks is 1.4p.u., i.e. 177kV；First ac terminal 101 and
Rated alternating current between two ac terminals 102 is 2kA.Overvoltage protection limits including first voltage in the present embodiment
Device 201, second voltage limiter 202, tertiary voltage limiter 203, current breaker 204, Voltage measure 205 and display mould
Block.Wherein,
First voltage limiter 201, second voltage limiter 202 and tertiary voltage limiter 203 are aoxidized using metal
Thing nonlinear resistor.The reference voltage of first voltage limiter 201 is 160kV, second voltage limiter 202 and tertiary voltage
The reference voltage of limiter 203 is 170kV.
The specified breaking capacity of current breaker 204 is 60A, first threshold voltage Uth=160kV, when power-frequency voltage component
Amplitude UHZWith first threshold voltage UthRatio reach closed path breaker 204 after predetermined value and closing time is no more than
100ms, suppress power-frequency overvoltage.Voltage measure 205 uses capacitive battery current transformer.
The first ac terminal 101 and the second ac terminal 102 of flexible ring net controller shown in Fig. 2 100 are respectively connected to
110kV ac bus.Rated alternating current between first ac terminal 101 and the second ac terminal 102 is 1.2kA.This reality
Applying overvoltage protection in example includes first voltage limiter 201, second voltage limiter 202, tertiary voltage limiter
203rd, current breaker 204, Voltage measure 205 and display module.Wherein,
First voltage limiter 201 uses capacitor, and second voltage limiter 202 and tertiary voltage limiter 203 are adopted
With metal oxide varistors device.The reference voltage of second voltage limiter 202 and tertiary voltage limiter 203 is
100kV。
The specified breaking capacity of current breaker 204 is 50A, first threshold voltage Uth=100kV, when power-frequency voltage component
Amplitude UHZWith first threshold voltage UthRatio reach closed path breaker 204 after predetermined value and closing time is no more than
100ms, suppress power-frequency overvoltage.Voltage measure 205 uses capacitive battery current transformer.
The overvoltage protection of flexible ring net controller provided by the invention, can be to the behaviour at flexible loop network control both ends
Make overvoltage, lightning surge and power-frequency overvoltage effectively to be suppressed, improve its operational reliability and security.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
1. a kind of overvoltage protection suitable for flexible ring net controller, the flexible ring net controller includes the first exchange
Terminal and the second ac terminal, it is characterised in that the overvoltage protection includes first voltage limiter, current breaker
And Voltage measure；
The first voltage limiter is connected between first ac terminal and the second ac terminal；
The Voltage measure, for measuring the power-frequency voltage component width between first ac terminal and the second ac terminal
Value UHZ；
The current breaker is in parallel with the first voltage limiter, is exchanged for the first ac terminal described in disjunction with second
Rated alternating current between terminal.
A kind of 2. overvoltage protection suitable for flexible ring net controller as claimed in claim 1, it is characterised in that
Rated alternating current between the ac terminal of current breaker disjunction first and the second ac terminal includes：
As the power-frequency voltage component amplitude UHZWith first threshold voltage UthRatio reach the electric current point closed after predetermined value
Disconnected device, suppresses power-frequency overvoltage.
A kind of 3. overvoltage protection suitable for flexible ring net controller as claimed in claim 1, it is characterised in that
The first threshold voltage UthRestrictive condition include：
Wherein, UHZmaxThe power-frequency voltage component amplitude U is resistant to for the flexible ring net controllerHZMaximum.
A kind of 4. overvoltage protection suitable for flexible ring net controller as claimed in claim 1, it is characterised in that institute
Stating overvoltage protection also includes second voltage limiter and tertiary voltage limiter；
One end of the second voltage limiter is connected with the first voltage limiter, other end ground connection；The tertiary voltage
One end of limiter is connected with the first voltage limiter, other end ground connection.
A kind of 5. overvoltage protection suitable for flexible ring net controller as claimed in claim 4, it is characterised in that
The second voltage limiter includes nonlinear resistor, linear resistor or straightline capacitor；
The tertiary voltage limiter includes nonlinear resistor, linear resistor or straightline capacitor.
A kind of 6. overvoltage protection suitable for flexible ring net controller as claimed in claim 1, it is characterised in that
The first voltage limiter includes nonlinear resistor or capacitor.
7. a kind of overvoltage protection suitable for flexible ring net controller as described in claim 1 or 4, its feature exist
In,
The first voltage limiter, second voltage limiter and tertiary voltage limiter include ZnO resistors device.
A kind of 8. overvoltage protection suitable for flexible ring net controller as claimed in claim 1, it is characterised in that
The current breaker includes breaker.
A kind of 9. overvoltage protection suitable for flexible ring net controller as claimed in claim 1, it is characterised in that
The Voltage measure includes capacitance type potential transformer, Resistive Voltage Transformer, resistance-capacitance differential pressure type voltage transformer
Or all -fiber formula voltage transformer.
A kind of 10. overvoltage protection suitable for flexible ring net controller as claimed in claim 1, it is characterised in that
The overvoltage protection also includes a display module；
The display module is connected with current breaker, for prompting rated alternating current described in current breaker disjunction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610616034.2A CN107666144A (en) | 2016-07-29 | 2016-07-29 | A kind of overvoltage protection suitable for flexible ring net controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610616034.2A CN107666144A (en) | 2016-07-29 | 2016-07-29 | A kind of overvoltage protection suitable for flexible ring net controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107666144A true CN107666144A (en) | 2018-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610616034.2A Pending CN107666144A (en) | 2016-07-29 | 2016-07-29 | A kind of overvoltage protection suitable for flexible ring net controller |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201726124U (en) * | 2010-03-12 | 2011-01-26 | 华东电力试验研究院有限公司 | Large current quick by-pass protection device |
| CN203826923U (en) * | 2013-03-29 | 2014-09-10 | 意法半导体(图尔)公司 | Overvoltage protection device capable of protecting power line and electronic apparatus |
-
2016
- 2016-07-29 CN CN201610616034.2A patent/CN107666144A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201726124U (en) * | 2010-03-12 | 2011-01-26 | 华东电力试验研究院有限公司 | Large current quick by-pass protection device |
| CN203826923U (en) * | 2013-03-29 | 2014-09-10 | 意法半导体(图尔)公司 | Overvoltage protection device capable of protecting power line and electronic apparatus |
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Application publication date: 20180206 |
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