CN108039693A - A kind of dc circuit breaker energy supplying system and its control method and device - Google Patents
A kind of dc circuit breaker energy supplying system and its control method and device Download PDFInfo
- Publication number
- CN108039693A CN108039693A CN201710840305.7A CN201710840305A CN108039693A CN 108039693 A CN108039693 A CN 108039693A CN 201710840305 A CN201710840305 A CN 201710840305A CN 108039693 A CN108039693 A CN 108039693A
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- circuit
- thyristor
- voltage
- frequency
- resonant capacitance
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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
Abstract
A kind of dc circuit breaker energy supplying system and its control method and device, wherein the energy supplying system, including：Resonant capacitance, its input terminal are connected by rectification circuit with low frequency ac potential source, and output terminal is connected by on-off circuit with resonant inductance；When on-off circuit turns on, the resonant capacitance produces resonance current with the resonant inductance, and low frequency ac is converted to high-frequency ac electricity output；Energy magnet ring is taken, is sleeved on energy supply cable, output terminal is connected with load, and the voltage that load requirement is met for the high-frequency alternating current to be converted to is load supplying.Compared to low frequency energy-provision way, in the application after low frequency ac is converted to high-frequency ac electricity output, the size for taking energy magnet ring can be reduced in the case where meeting identical power demands, then reduces high voltage DC breaker system bulk and system cost.
Description
Technical field
The present invention relates to electric power protection field, and in particular to a kind of dc circuit breaker energy supplying system and its control method and dress
Put.
Background technology
Based on the DC transmission system of flexible DC power transmission due to its good characteristic, it has also become the heat of power domain at present
One of point, also will be the important component of following power grid structure.Since the damping of straight-flow system is relatively low, in straight-flow system
Fault current climbing speed is very fast, in order to ensure safety, it is necessary to realize that fault current is cut off in millisecond, therefore, possesses big electricity
Flowing the high voltage DC breaker of ultrahigh speed disjunction becomes one of Core equipment of structure DC grid；Compared to mechanical and solid-state
Formula high voltage DC breaker, mixed type high voltage DC breaker possess the advantages such as high speed disjunction and low power operation, become
Mainstream technology in the industry at this stage, mixed type high voltage DC breaker is by the group such as ultrahigh speed mechanical switch and a large amount of power electronics components
Into, wherein, the power supply of power electronics component control circuit possesses the characteristics of power supplies for high voltage circuit, and power electronics component control circuit supplies
Electric reliability directly affects whole breaker reliability of operation.
The power supply electric energy of mixed type high voltage DC breaker is generally derived from alternating current in the prior art, to the high straightening of mixed type
The power-frequency voltage of alternating current will be derived from during power electronics group electricity power supply in stream breaker directly and high voltage DC breaker
In the connection of power electronics component, since city's electric potential is relatively low, need to increase take can be in magnet ring coil revolution to meet electric power electricity
The characteristics of sub-component power supplies for high voltage circuit, then increase high voltage DC breaker system bulk and system cost.
The content of the invention
Therefore, the technical problem to be solved in the present invention is that existing dc circuit breaker energy supplying system volume is larger, is designed to
This height.
In view of this, the present invention provides a kind of dc circuit breaker energy supplying system, including：
Resonant capacitance, its input terminal are connected by rectification circuit with low frequency ac potential source, and output terminal passes through on-off circuit
It is connected with resonant inductance, when on-off circuit turns on, the resonant capacitance produces resonance current with the resonant inductance, by low frequency
Alternating current is converted to high-frequency ac electricity output；
Energy magnet ring is taken, is sleeved on the energy supply cable of the system, output terminal is connected with load, for the high frequency to be handed over
Galvanic electricity, which is converted to, meets that the voltage of load requirement is load supplying.
Preferably, further include：Controller, is connected with the rectification circuit, the on-off circuit respectively, described for controlling
Rectification circuit, on-off circuit action.
Preferably, it is controllable to include the single phase full bridge controlled rectifier based on thyristor, single-phase full wave for the rectification circuit
Any one in rectification circuit, three-phase full-bridge controlled rectifier and three-phase half-wave controlled rectifier circuit.
Preferably, the on-off circuit includes single thyristor or thyristor bridge circuit.
Preferably, the resonant inductance includes stray inductance and resonance reactor.
Correspondingly, the present invention also provides a kind of control method of dc circuit breaker energy supplying system, including：
Judge whether the voltage of resonant capacitance meets preset charge voltage；
When the voltage of the resonant capacitance meets the preset charge voltage, control low frequency ac potential source stops supplying
Electricity；
Open the thyristor in on-off circuit so that the resonant capacitance produces resonance current with resonant inductance, by low frequency
Alternating current is converted to high-frequency alternating current and by taking energy magnet ring to export to load.
Preferably, the thyristor opened in on-off circuit so that the resonant capacitance produces resonance with resonant inductance
Electric current, by low frequency ac be converted to high-frequency alternating current and by take can magnet ring export to load the step of, including：
Judge whether the thyristor in the on-off circuit occurs locking；
When locking occurs for the thyristor, open the thyristor in rectification branch and control the low frequency ac potential source
Start to power.
Preferably, before the step of whether voltage for judging resonant capacitance meets preset charge voltage, including：
Thyristor in control rectification circuit is in opening state, and the thyristor in the on-off circuit is in latch like
State.
Correspondingly, the present invention also provides a kind of control device of dc circuit breaker energy supplying system, including：
Whether judging unit, the voltage for judging resonant capacitance meet preset charge voltage；
Control unit, for when the voltage of the resonant capacitance meets the preset charge voltage, controlling low-frequency ac
Voltage source is stopped power supply；
Unit is opened, for opening the thyristor in on-off circuit so that the resonant capacitance produces humorous with resonant inductance
Shake electric current, and low frequency ac is converted to high-frequency alternating current and by taking energy magnet ring to export to load.
Preferably, the unit of opening includes：
Whether judgment sub-unit, the thyristor for judging in the on-off circuit occur locking；
Subelement is opened, for when locking occurs for the thyristor, opening the thyristor in rectification branch and controlling institute
Low frequency ac potential source is stated to start to power.
Preferably, include before the judging unit performs operation：
Status control unit, for controlling the thyristor in rectification circuit to be in opening state, in the on-off circuit
Thyristor is in blocking.
Dc circuit breaker energy supplying system provided in an embodiment of the present invention, resonance electricity is formed by resonant capacitance and resonant inductance
Road, when on-off circuit turns on, resonant capacitance produces resonance current with resonant inductance, and low frequency ac is converted to high-frequency ac
Electricity output, take can magnet ring high-frequency alternating current be converted to meet that the voltage of load requirement is load supplying, due to dc circuit breaker
The energy supply demand of the high potential of interior power electronics component, after low frequency ac is converted to high-frequency ac electricity output, full
Reduce the magnetic core size for taking energy magnet ring while the power demands of the identical power electronics component of foot, then reduce high straightening
Flow circuit breaker system volume and system cost；
Correspondingly, the control method and device of dc circuit breaker energy supplying system provided in an embodiment of the present invention, passes through judgement
Whether the voltage of resonant capacitance meets preset charge voltage, and when the voltage of resonant capacitance meets preset charge voltage, control is low
Frequency alternating-current voltage source is stopped power supply, and opens the thyristor in on-off circuit so that resonant capacitance produces resonance electricity with resonant inductance
Stream, high-frequency alternating current is converted to and by taking energy magnet ring to export to load by low frequency ac.Compared to low frequency energy-provision way, adopt
The size for taking energy magnet ring can be reduced in the case where meeting identical power demands with high frequency energy supply, high voltage direct current is then reduced and break
Road device system bulk and system cost.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in describing below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
Put, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of structure diagram of dc circuit breaker energy supplying system provided in an embodiment of the present invention；
Fig. 2 is the structural representation of a kind of dc circuit breaker energy supplying system and its rectification circuit provided in an embodiment of the present invention
Figure；
Fig. 3 is a kind of flow chart of the control method for dc circuit breaker energy supplying system that another embodiment of the present invention provides；
Fig. 4 is a kind of structural representation of the control device for dc circuit breaker energy supplying system that another embodiment of the present invention provides
Figure.
Embodiment
Technical scheme is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's all other embodiments obtained without making creative work, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of dc circuit breaker energy supplying system, as shown in Figure 1, including：
Resonant capacitance 103, its input terminal are connected by rectification circuit 102 with low frequency ac potential source 101, and output terminal passes through
On-off circuit 104 is connected with resonant inductance 105, when on-off circuit 104 turns on, the resonant capacitance 103 and resonance electricity
Sense 105 produces resonance current, and low frequency ac is converted to high-frequency ac electricity output.Dc circuit breaker is directly from city's electric absorption energy
Amount, the frequency of alternating current is 50Hz, by AC conversion is that direct current is that resonant capacitance 103 charges by rectification circuit 102, rectification
Circuit 102 can be the single phase full bridge controlled rectifier (as shown in 111 in Fig. 2 (a)) based on thyristor 114, single-phase complete
Ripple controlled rectification circuit (shown in such as Fig. 2 (c)), three-phase full-bridge controlled rectifier (shown in such as Fig. 2 (d)) and three-phase semiwave are controllable
Any one in rectification circuit (such as Fig. 2 (e) shown in)；The resonant inductance 105 can include stray inductance and resonance reactor；
The on-off circuit can be single thyristor 114 (as shown in 113 in Fig. 2 (b)) or thyristor bridge circuit (in such as Fig. 2 (a)
112 shown in), when on-off circuit uses thyristor bridge circuit, it is ensured that positive-negative half-cycle of the resonance current in power frequency period
Inside realize Symmetrical, and then the magnetic reset of magnet ring is effectively realized in power frequency period, eliminate the remanent magnetism in magnet ring, prevent magnet ring
Saturation.
Take can magnet ring 106, be sleeved on the energy supply cable of the system, output terminal is connected with load, for by the height
Frequency alternating current, which is converted to, meets that the voltage of load requirement is load supplying.By taking energy magnet ring that high-frequency alternating current is converted to stabilization
For voltage output to loading, which is power electronics component different in dc circuit breaker.Due to electric power electricity in dc circuit breaker
Load more in sub-component, and rated voltage needed for different loads is different, by setting it is multiple take can magnet ring, electromagnetic induction
Go out to meet the voltage of the loading demand of different voltages grade, be then load supplying.
Dc circuit breaker energy supplying system provided in an embodiment of the present invention, resonance electricity is formed by resonant capacitance and resonant inductance
Road, when on-off circuit turns on, resonant capacitance produces resonance current with resonant inductance, and low frequency ac is converted to high-frequency ac
Electricity output, take can magnet ring high-frequency alternating current be converted to meet that the voltage of load requirement is load supplying.Due to dc circuit breaker
The energy supply demand of the high potential of interior power electronics component, after low frequency ac is converted to high-frequency ac electricity output, full
Reduce the magnetic core size for taking energy magnet ring while the power demands of the identical power electronics component of foot, then reduce high straightening
Flow circuit breaker system volume and system cost.
Preferably, which further includes：Controller 107, respectively with the rectification circuit 102, institute
State on-off circuit 104 to connect, for controlling the rectification circuit, resonance circuit action.Due to rectification branch and switch electricity
Road includes thyristor, can according to the characteristic of the current over-zero automatic shutoff of thyristor, with reference to controller realize rectification circuit with
On-off circuit works alternatively, and controller control low frequency ac potential source carries out intermittent power supply, improves in dc circuit breaker
Electromagnetic environment, can reduce the electromagnetic quantities in dc circuit breaker, improve electromagnetic environment, improve the stability of energy supplying system.
Another embodiment of the present invention provides a kind of control method of dc circuit breaker energy supplying system, as shown in figure 3, including：
S201, judges whether the voltage of resonant capacitance meets preset charge voltage, when the voltage of the resonant capacitance meets
During the preset charge voltage, step S202 is performed.Resonant capacitance is needed to resonance before producing resonance current with resonant inductance
Capacitance charges, and preset charge voltage can be the rated voltage of resonant capacitance.
S202, control low frequency ac potential source are stopped power supply.When low-voltage AC potential source is stopped power supply, according to thyristor
The characteristic of current over-zero automatic shutoff, the thyristor in rectification circuit occur locking, realize the power supply stopped to resonant capacitance.
S203, opens the thyristor in on-off circuit so that the resonant capacitance produces resonance current with resonant inductance, will
Low frequency ac is converted to high-frequency alternating current and by taking energy magnet ring to export to load.Compared to the high-frequency inversion side based on IGBT
Case, using thyristor as device for power switching, reduces system cost.
The control method of dc circuit breaker energy supplying system provided in an embodiment of the present invention, by the voltage for judging resonant capacitance
Whether preset charge voltage is met, when the voltage of resonant capacitance meets preset charge voltage, control low frequency ac potential source stops
Only power, open the thyristor in on-off circuit so that resonant capacitance produces resonance current with resonant inductance, by low frequency ac
Be converted to high-frequency alternating current and by taking energy magnet ring to export to load.Due to the energy supply of the power electronics component in dc circuit breaker
Demand, after low frequency ac is converted to high-frequency ac electricity output, is meeting the power demands of identical power electronics component
While reduce take can magnet ring size, then reduce high voltage DC breaker system bulk and system cost.
Step S203, including：
First, it is determined that whether the thyristor in the on-off circuit occurs locking；
Secondly, when locking occurs for the thyristor, open the thyristor in rectification branch and control the low-frequency ac
Voltage source starts to power.According to the characteristic of thyristor current flows zero passage automatic shutoff, when locking occurs for the thyristor in resonance circuit,
The electric current of resonance circuit is reduced to zero at this time, shows that resonant capacitance electric discharge terminates, then opens the thyristor in rectification branch and control
Low frequency ac potential source processed restarts to power.By controlling the cooperation of rectification circuit and on-off circuit, dc circuit breaker is realized
Intermittent pulses are powered, and the program send energy scheme compared to continuous high frequency, can improve the electromagnetic environment in dc circuit breaker, improves
The stability of energy supplying system.
Before step S201, including：
Thyristor in control rectification circuit is in opening state, and the thyristor in the on-off circuit is in latch like
State.So that low frequency ac potential source is continuously resonant capacitance charging.
The control method of dc circuit breaker energy supplying system provided in an embodiment of the present invention, by the voltage for judging resonant capacitance
Whether preset charge voltage is met, when the voltage of resonant capacitance meets preset charge voltage, control low frequency ac potential source stops
Only power, open the thyristor in on-off circuit so that resonant capacitance produces resonance current with resonant inductance, by low frequency ac
Be converted to high-frequency alternating current and by taking energy magnet ring to export to load.Compared to low frequency energy-provision way, turn by low frequency ac
After being changed to high-frequency ac electricity output, it can reduce in the case where meeting the power demands of identical power electronics component and take energy magnet ring
Size, then reduces high voltage DC breaker system bulk and system cost.
Correspondingly, the embodiment of the present invention also provides a kind of control device of dc circuit breaker energy supplying system, as shown in figure 4,
Including：
Whether judging unit 41, the voltage for judging resonant capacitance meet preset charge voltage；
Control unit 42, for when the voltage of the resonant capacitance meets the preset charge voltage, control low frequency to be handed over
Galvanic electricity potential source is stopped power supply；
Unit 43 is opened, for opening the thyristor in on-off circuit so that the resonant capacitance is produced with resonant inductance
Resonance current, high-frequency alternating current is converted to and by taking energy magnet ring to export to load by low frequency ac.
Preferably, the unit 43 of opening includes：
Whether judgment sub-unit, the thyristor for judging in the on-off circuit occur locking；
Subelement is opened, for when locking occurs for the thyristor, opening the thyristor in rectification branch and controlling institute
Low frequency ac potential source is stated to start to power.
Preferably, include before the judging unit performs operation：
Status control unit, for controlling the thyristor in rectification circuit to be in opening state, in the on-off circuit
Thyristor is in blocking.
The control device of dc circuit breaker energy supplying system provided in an embodiment of the present invention, judges resonance electricity by judging unit
Whether the voltage of appearance meets preset charge voltage, when the voltage of resonant capacitance meets preset charge voltage, controls low-frequency ac
Voltage source is stopped power supply, and opens the thyristor in on-off circuit so that resonant capacitance produces resonance current with resonant inductance, will be low
Frequency alternating current is converted to high-frequency alternating current and by taking energy magnet ring to export to load.Compared to low frequency energy-provision way, by low frequency
After alternating current is converted to high-frequency ac electricity output, it can reduce in the case where meeting the power demands of identical power electronics component and take
The size of energy magnet ring, then reduces high voltage DC breaker system bulk and system cost.
Obviously, the above embodiments are merely examples for clarifying the description, and the restriction not to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (11)
- A kind of 1. dc circuit breaker energy supplying system, it is characterised in that including：Resonant capacitance, its input terminal are connected by rectification circuit with low frequency ac potential source, output terminal by on-off circuit with it is humorous Shake inductance connection, when on-off circuit turns on, the resonant capacitance produces resonance current with the resonant inductance, by low-frequency ac Electricity is converted to high-frequency ac electricity output；Take can magnet ring, be sleeved on the energy supply cable of the system, output terminal is connected with load, for by the high-frequency alternating current Be converted to and meet that the voltage of load requirement is load supplying.
- 2. system according to claim 1, it is characterised in that further include：Controller, respectively with the rectification circuit, institute On-off circuit connection is stated, for controlling the rectification circuit, on-off circuit action.
- 3. system according to claim 2, it is characterised in that the rectification circuit includes the single-phase bridge based on thyristor All controlled rectifier circuit, single-phase full wave controlled rectification circuit, three-phase full-bridge controlled rectifier and three-phase half-wave controlled rectifier circuit In any one.
- 4. system according to claim 2, it is characterised in that the on-off circuit includes single thyristor or thyristor bridge Formula circuit.
- 5. system according to claim 2, it is characterised in that the resonant inductance includes stray inductance and resonance reactance Device.
- A kind of 6. control method of dc circuit breaker energy supplying system, it is characterised in that including：Judge whether the voltage of resonant capacitance meets preset charge voltage；When the voltage of the resonant capacitance meets the preset charge voltage, control low frequency ac potential source is stopped power supply；Open the thyristor in on-off circuit so that the resonant capacitance produces resonance current with resonant inductance, by low-frequency ac Electricity is converted to high-frequency alternating current and by taking energy magnet ring to export to load.
- 7. according to the method described in claim 6, it is characterized in that, the thyristor opened in on-off circuit so that described Resonant capacitance produces resonance current with resonant inductance, and low frequency ac is converted to high-frequency alternating current and by taking energy magnet ring to export To load the step of, including：Judge whether the thyristor in the on-off circuit occurs locking；When locking occurs for the thyristor, open the thyristor in rectification branch and control the low frequency ac potential source to start Power supply.
- 8. according to the method described in claim 6, it is characterized in that, whether the voltage for judging resonant capacitance meets default fill Before the step of piezoelectric voltage, including：Thyristor in control rectification circuit is in opening state, and the thyristor in the on-off circuit is in blocking.
- A kind of 9. control device of dc circuit breaker energy supplying system, it is characterised in that including：Whether judging unit, the voltage for judging resonant capacitance meet preset charge voltage；Control unit, for when the voltage of the resonant capacitance meets the preset charge voltage, controlling low-frequency ac voltage Stop power supply in source；Unit is opened, for opening the thyristor in on-off circuit so that the resonant capacitance produces resonance electricity with resonant inductance Stream, high-frequency alternating current is converted to and by taking energy magnet ring to export to load by low frequency ac.
- 10. device according to claim 9, it is characterised in that the unit of opening includes：Whether judgment sub-unit, the thyristor for judging in the on-off circuit occur locking；Subelement is opened, for when locking occurs for the thyristor, opening the thyristor in rectification branch and controlling described low Frequency alternating-current voltage source starts to power.
- 11. device according to claim 9, it is characterised in that include before the judging unit performs operation：Status control unit, for controlling the thyristor in rectification circuit to be in opening state, the brilliant lock in the on-off circuit Pipe is in blocking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710840305.7A CN108039693A (en) | 2017-09-18 | 2017-09-18 | A kind of dc circuit breaker energy supplying system and its control method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710840305.7A CN108039693A (en) | 2017-09-18 | 2017-09-18 | A kind of dc circuit breaker energy supplying system and its control method and device |
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| Publication Number | Publication Date |
|---|---|
| CN108039693A true CN108039693A (en) | 2018-05-15 |
Family
ID=62093144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710840305.7A Pending CN108039693A (en) | 2017-09-18 | 2017-09-18 | A kind of dc circuit breaker energy supplying system and its control method and device |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113394993A (en) * | 2021-07-12 | 2021-09-14 | 国网安徽省电力有限公司阜阳供电公司 | High-potential high-frequency pulse multistage power supply system for medium-high voltage solid-state alternating current switch |
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Address after: 102209 18 Riverside Avenue, Changping District science and Technology City, Beijing Applicant after: Global energy Internet Institute, Inc. Applicant after: State Grid Corporation of China Applicant after: State Grid Zhejiang Electric Power Company Address before: 102209 18 Riverside Avenue, Changping District science and Technology City, Beijing Applicant before: Global energy Internet Institute, Inc. Applicant before: State Grid Corporation of China Applicant before: State Grid Zhejiang Electric Power Company |
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Application publication date: 20180515 |