CN109560527A - A kind of hybrid online electricity-fetching method of dc circuit breaker driving circuit - Google Patents
A kind of hybrid online electricity-fetching method of dc circuit breaker driving circuit Download PDFInfo
- Publication number
- CN109560527A CN109560527A CN201811500493.XA CN201811500493A CN109560527A CN 109560527 A CN109560527 A CN 109560527A CN 201811500493 A CN201811500493 A CN 201811500493A CN 109560527 A CN109560527 A CN 109560527A
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- China
- Prior art keywords
- hybrid
- circuit breaker
- breaker
- voltage
- circuit
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/06—Arrangements for supplying operative power
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
Abstract
The invention discloses a kind of hybrid dc circuit breakers to ask for method for electrically, comprising: DC/DC module: circuit breaker internal element both end voltage is adjusted to operating voltage needed for control module；Energy-storage battery: extra electricity is stored；Control module: it acts accordingly for receiving fault-signal that relay protection system is sent and controlling breaker；DC/AC module: DC voltage is converted into high-frequency alternating current；High frequency transformer: the structure by the way that multiple coils from parallel connection of coils are arranged in secondary side realizes multichannel driving；Driving circuit: it is used for driving power electronic component.The present invention is in hybrid direct-current breaker topology structure basis, for its " state of putting into operation-shutdown ", two processes of " off state-puts into operation ", it is proposed a kind of method for taking electricity online, directly energy is obtained from breaker main circuit, switch to multiple-channel output after transformed, provides driving power for the main branch of breaker and the power electronic devices of transfer branch, power without independent current source, structure is simple, high reliablity.
Description
Technical field
The invention patent belongs to flexible direct-current transmission field, is a kind of with electric for breaker apparatus after line takes electricity transformed
The control method of power electronic device offer driving power.
Background technique
Develop the most important technical bottleneck of DC grid be dc circuit breaker development, hybrid dc circuit breaker usually by
The main branch of mechanical switch and electronic power switch composition, the transfer branch branch of electronic power switch composition, capacitive buffer branch
The energy consumption branch composition that road and Zinc-Oxide Arrester group are constituted, wherein the reliable driving of electronic power switch is to guarantee its effective work
The key link of work.(HVDC) provides driving power for these power electronic devices and exists centainly in HVDC transmission system
Difficulty, current product-level breaker mainly powered using external power supply, and main problem is:
(1) structure is complicated, and power-supply system overall cost is higher；
(2) when exterior power supply plant breaks down, then breaker failure.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the present invention provides a kind of hybrid dc circuit breaker driving electricity
The online electricity-fetching method in road is powered without external power supply, and breaker actuation is not influenced by the method for operation, failure and non-faulting situation
Under all can successful operation.
Technical scheme is as follows:
A kind of hybrid online electricity-fetching method of dc circuit breaker driving circuit, comprising: DC/DC module, energy-storage battery, control
Module, DC/AC module, high frequency transformer, driving circuit；The DC/DC module adjusts circuit breaker internal element both end voltage
To operating voltage needed for control module；The energy-storage battery stores extra electricity；The control module: for receiving
Fault-signal that relay protection system is sent simultaneously controls breaker and acts accordingly under different operation modes；The DC/
DC voltage is converted to high-frequency alternating current by AC module, thus the volume of transformer core needed for reducing；The high frequency transformation
Device: the structure by the way that multiple coils from parallel connection of coils are arranged in secondary side realizes multichannel driving；The driving circuit: turn including AC-DC
It changes and is driven with power electronic element, to control cut-offfing for hybrid dc circuit breaker.
It is transformed to turn with main branch auxiliary switch both end voltage when hybrid dc circuit breaker is operated normally, need to be disconnected
It moves branch power electronic devices and driving voltage is provided；After short circuit occurs for DC line, when hybrid dc circuit breaker need to disconnect, with
Main branch auxiliary switch both end voltage is transformed to provide driving voltage for transfer branch power electronic devices, and disconnection process is not
The influence for the method for operation of uniting.In the case that breaker disconnects, when being connected to close commands, to buffer concatenated capacitor both ends in branch
Voltage is converted, and provides driving voltage to shift the power electronic devices of branch in breaker.By DC/DC module, will mix
The voltage at box-like dc circuit breaker internal element both ends is converted to unified value and is handled by control module.Control module passes through
Analysis to system running state and working state of circuit breaker, after being connected to the instruction of relay protection system, in different operating shape
Under state, using the voltage driving power electronic component at different elements both ends, to ensure that breaker by instruction action, is not necessarily to external electricity
Source.The DC voltage that control module exports is converted into high-frequency alternating current by DC/AC module, transformer needed for effectively reducing
The volume of iron core, and multichannel driving is realized through multiple coils of high frequency transformer secondary side parallel connection.Power electronic element drives mould
Block has AC/DC conversion function, is powered by high frequency transformer secondary side, which receives the instruction of breaker control module with reality
The conducting or locking of existing power electronic devices.
The advantage is that:
(1) breaker is in closed state, and when receiving cut-off signals, electric current is flowed through by main branch, by main branch IGBT
Both ends pressure drop provides driving voltage after a series of transformation, for transfer branch IGBT, whether under normal operating conditions, or hair
After failure after raw short circuit, this takes electric scheme to can be achieved online；
(2) breaker, which is in, cut-offs state, and when receiving closure signal, circuit breaker internal current value is zero, but both ends electricity
Pressure is equal to direct current system voltage rating.Buffering branch capacitor both end voltage is taken, is mentioned after transformed for breaker power electronic devices
For driving voltage；
(3) online power-supply circuit uses the mould of " taking electricity -- DC/DC--DC/AC-- magnetic coupling -- AC/DC-- multi-channel control "
Formula realizes multichannel driving, and structure is simple, small in size, is easily installed, has engineer application meaning.
Detailed description of the invention
Fig. 1 is that the present invention asks for method for electrically in the control of breaker, the total schematic diagram of driving circuit.
Fig. 2 be the present invention ask for that method for electrically turns off when breaker puts into operation take electric process online
Fig. 3 is that the present invention asks for method for electrically conducting transfer branch power electronic element in breaker shutdown and takes electricity online
Process.
Fig. 4 is that the present invention asks for method for electrically in breaker shutdown in the operation to be closed, conducting main branch power electronics
Switch takes electric process online.
Specific embodiment
Below with reference to the attached drawing of the invention patent, by specific embodiment to it is proposed by the invention ask for method for electrically into
Row explanation.
Fig. 1 is the control of the invention patent, the total schematic diagram of driving circuit.
See Fig. 2, when normal operation, load current is flowed through from the main branch being made of Fast mechanical switch and auxiliary switch,
IGBT and Power Diode Pumped both ends in main branch have the pressure drop of 3~5V, after DC/DC circuit transformations, then by DC/AC circuit
It is converted into high-frequency alternating current, is added on transformer primary side, Circuit Fault on Secondary Transformer is electric by AC/DC by multi-coil parallel connection, then respectively
Road conversion, is applied to control circuit, to control the IGBT of transfer branch.Because drive circuit power consumption is very low (generally less than 1W),
Therefore extra electricity can be stored in energy-storage battery.
It is received after cut-offfing instruction when short trouble, breaker occur for DC line, first applies conducting to transfer branch IGBT
Signal, while IGBT, the Fast mechanical switch being latched in main branch auxiliary switch start separating brake, fault current is gradually from main branch
It is transferred to transfer branch.After mechanical switch motion in place, block signal is applied to transfer branch IGBT, fault current is transferred to
It is consumed to zero in MOV (Zinc-Oxide Arrester group) branch, failure removal；
See Fig. 3, when breaker off-state, direct current system voltage rating is born at both ends, therefore takes buffering branch concatenated
Capacitor both end voltage is converted into high-frequency ac through DC/AC circuit again after carrying out DC/DC transformation, is added on transformer primary side, transformation
Device secondary side is by multi-coil parallel connection, then passes through AC/DC circuit conversion respectively, forms multi-way control signals and is applied to control circuit,
To which transfer branch IGBT be connected.
See Fig. 4, when main branch Fast mechanical switch closure in place and maintain stablize and line current in the normal range when,
Using transfer branch in the pressure drop of the both ends IGBT, boosted by DC/DC circuit, then through DC/AC circuit conversion be high-frequency alternating current, through becoming
It is applied respectively to the control circuit of main branch IGBT after depressor transformation, main branch, locking transfer branch IGBT is connected, breaker is thrown
Fortune is completed.
It should be pointed out that only listing property illustrates the principle of the present invention and effect to the present embodiment, and non-owner limitation is of the invention.Appoint
What one skilled in the art can without departing from the spirit and scope of the present invention modify to above-described embodiment.Cause
This, the scope of the present invention should be as listed in the claims.
Claims (8)
1. a kind of hybrid dc circuit breaker asks for method for electrically characterized by comprising
Circuit breaker internal element both end voltage is adjusted to operating voltage needed for control module by DC/DC module；
Energy-storage battery stores extra electricity；
Control module: for receiving fault-signal that relay protection system is sent and controlling breaker under different operation modes
It acts accordingly；
DC voltage is converted to high-frequency alternating current by DC/AC module, thus the volume of transformer core needed for reducing；
High frequency transformer: the structure by the way that multiple coils from parallel connection of coils are arranged in secondary side realizes multichannel driving；
Driving circuit: including AC-DC conversion and power electronic element driving, to control cut-offfing for hybrid dc circuit breaker.
2. a kind of hybrid dc circuit breaker according to claim 1 asks for method for electrically, it is characterised in that: hybrid direct current
It is transformed for transfer branch power electronic devices with main branch auxiliary switch both end voltage when breaker is operated normally, need to be disconnected
Driving voltage is provided.
3. a kind of hybrid dc circuit breaker according to claim 1 asks for method for electrically, it is characterised in that: DC line hair
It is transformed for transfer branch electricity with main branch auxiliary switch both end voltage when hybrid dc circuit breaker need to disconnect after raw short circuit
Power electronic device provides driving voltage, and disconnection process is not influenced by system operation mode.
4. a kind of hybrid dc circuit breaker according to claim 1 asks for method for electrically, it is characterised in that: breaker disconnects
In the case where, it when being connected to close commands, is converted with buffering concatenated capacitor both end voltage in branch, to be shifted in breaker
The power electronic devices of branch provides driving voltage.
5. a kind of hybrid dc circuit breaker according to claim 1 asks for method for electrically, it is characterised in that: pass through DC/DC
The voltage at hybrid dc circuit breaker internal element both ends is converted to unified value and is handled by control module by module.
6. a kind of hybrid dc circuit breaker according to claim 1 asks for method for electrically, it is characterised in that: control module is logical
The analysis to system running state and working state of circuit breaker is crossed, after being connected to the instruction of relay protection system, in different operating
Under state, using the voltage driving power electronic component at different elements both ends, to ensure breaker by instruction action, without external
Power supply.
7. a kind of hybrid dc circuit breaker according to claim 1 asks for method for electrically, it is characterised in that: pass through DC/AC
The DC voltage that control module exports is converted to high-frequency alternating current by module, the volume of transformer core needed for effectively reducing, and
Multiple coils through high frequency transformer secondary side parallel connection realize multichannel driving.
8. a kind of hybrid dc circuit breaker according to claim 1 asks for method for electrically, it is characterised in that: power electronics member
Part drive module has AC/DC conversion function, is powered by high frequency transformer secondary side, which receives breaker control module
Instruct the conducting or locking to realize power electronic devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811500493.XA CN109560527A (en) | 2018-12-10 | 2018-12-10 | A kind of hybrid online electricity-fetching method of dc circuit breaker driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811500493.XA CN109560527A (en) | 2018-12-10 | 2018-12-10 | A kind of hybrid online electricity-fetching method of dc circuit breaker driving circuit |
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| CN109560527A true CN109560527A (en) | 2019-04-02 |
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| CN201811500493.XA Pending CN109560527A (en) | 2018-12-10 | 2018-12-10 | A kind of hybrid online electricity-fetching method of dc circuit breaker driving circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110783932A (en) * | 2019-12-02 | 2020-02-11 | 广东电网有限责任公司 | Hybrid circuit breaker topology system for switching alternating current capacitive load |
| CN111030158A (en) * | 2019-12-26 | 2020-04-17 | 荣信汇科电气技术有限责任公司 | Energy consumption branch circuit for preventing overvoltage of direct current side of direct current power transmission system and control method |
| CN113299505A (en) * | 2021-05-27 | 2021-08-24 | 西安交通大学 | Mixed current-limiting on-off direct current breaker |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110783932A (en) * | 2019-12-02 | 2020-02-11 | 广东电网有限责任公司 | Hybrid circuit breaker topology system for switching alternating current capacitive load |
| CN110783932B (en) * | 2019-12-02 | 2020-09-25 | 广东电网有限责任公司 | Hybrid circuit breaker topology system for switching alternating current capacitive load |
| CN111030158A (en) * | 2019-12-26 | 2020-04-17 | 荣信汇科电气技术有限责任公司 | Energy consumption branch circuit for preventing overvoltage of direct current side of direct current power transmission system and control method |
| CN111030158B (en) * | 2019-12-26 | 2024-01-12 | 荣信汇科电气股份有限公司 | Energy consumption branch circuit for preventing direct-current side overvoltage of direct-current power transmission system and control method |
| CN113299505A (en) * | 2021-05-27 | 2021-08-24 | 西安交通大学 | Mixed current-limiting on-off direct current breaker |
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Application publication date: 20190402 |
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