CN106486965A - A kind of dc circuit breaker of self-excited oscillation type and its control method - Google Patents
A kind of dc circuit breaker of self-excited oscillation type and its control method Download PDFInfo
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- CN106486965A CN106486965A CN201610953690.1A CN201610953690A CN106486965A CN 106486965 A CN106486965 A CN 106486965A CN 201610953690 A CN201610953690 A CN 201610953690A CN 106486965 A CN106486965 A CN 106486965A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/025—Disconnection after limiting, e.g. when limiting is not sufficient or for facilitating disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
Abstract
A kind of self-excited oscillation type dc circuit breaker, including control system, protection branch road, breaker body in parallel, LC oscillating circuit；Breaker body is used for controlling the break-make of HVDC transmission system, and breaker body includes operating mechanism, and operating mechanism is used for driving two contact separation of breaker body or contact to realize separating brake or combined floodgate；LC oscillating circuit is composed in series by electric capacity, inductance；Protection branch road is used for, when the voltage at breaker body and/or LC oscillating circuit two ends is more than or equal to voltage setting value, carrying out voltage clamping；Control system is used for controlling breaker body break-make by operating mechanism；Control system is used for controlling breaker body break-make to include by operating mechanism：Control system first controls two contact separation of breaker body to produce electric arc, then controls two contacts to separate to insulation distance when the electric current through breaker body is less than or equal to current setting value.
Description
Technical field
The present invention relates to breaker technical field, more particularly to a kind of dc circuit breaker of self-excited oscillation type and its controlling party
Method.
Background technology
Compared with conventional AC power transmission mode, the advantage of direct current transportation is：Unit power transmission line of electricity cost is lower, line
Road active loss very little, and without reactive loss, be applicable not only under sea cable power transmission also without system instability, regulation
Speed is rapid, and operation is convenient and reliable, and therefore the application of HVDC Transmission Technology is increasingly urgent.Particularly in some special dimensions, directly
Streaming system has been obtained for sufficiently application, and for example Feeding System of Urban Rail Transit, large ship electric power system, wait field straight
Streaming system has obtained significant progress.But the bind mode flexible, various with respect to AC transmission system, current straight-flow system
Two end systems are rested on mostly, and it is the key factor for restricting straight-flow system development to lack robust high voltage DC breaker.
In existing dc circuit breaker scheme, mechanical dc circuit breaker is mostly passed by increasing arc voltage or segmentation
Enter the modes such as current-limiting resistance, these schemes are had some limitations in itself, general drop-out voltage is less than 3000V, it is difficult to
Adapt to the development need of power system.On the other hand, with the development of Power Electronic Technique, all solid state breaker solves tradition
Mechanical breaker the problem for being difficult in adapt to voltage levels, but which is little compared with high on-state loss, and the system of great number
This is caused equally to govern its development.
Content of the invention
In order to overcome the problems referred to above, the present invention provides a kind of machine by self-oscillation mode manufacture of intraocular current zero-crossing point
Tool formula stream breaker., with respect to all solid state breaker, on-state loss is little, low cost of manufacture for the present invention, while solving tradition
Mechanical breaker cannot complete the difficult problem for cut-offfing task of high-voltage large current.
For reaching above-mentioned advantage, the present invention provides a kind of self-excited oscillation type dc circuit breaker, including control system, protection
Road, breaker body and LC oscillating circuit；The breaker body is used for controlling the break-make of HVDC transmission system, described disconnected
Road device body includes operating mechanism, operating mechanism be used for drive breaker body two contact separation or contact with realize separating brake or
Close a floodgate；The LC oscillating circuit includes electric capacity and the inductance being connected in series；The protection branch road is in parallel with the LC oscillating circuit,
The protection branch road is used for, when the voltage at the LC oscillating circuit two ends is more than or equal to voltage setting value, carrying out voltage clamp
Position；The control system is connected with the operating mechanism, and the control system is used for controlling two contacts of the breaker body
Separate and electric arc is produced, then control two contact when the electric current through the breaker body is less than or equal to current setting value
Separate to insulation distance.
In one embodiment of the self-excited oscillation type dc circuit breaker of the present invention, the self-excited oscillation type dc circuit breaker
Also include signal acquiring system, the signal acquiring system is used for gathering information of voltage, the current information of the breaker body
And the current information of the operating mechanism, information of voltage, ambient temperature information and the contact displacement information.
In one embodiment of the self-excited oscillation type dc circuit breaker of the present invention, the self-excited oscillation type dc circuit breaker
Also include signal processing system, the signal processing system includes filter circuit, amplifying circuit and the A/D conversion being connected in series
Device.
In one embodiment of the self-excited oscillation type dc circuit breaker of the present invention, the control system is additionally operable to according to institute
State the information of voltage of breaker body, current information calculate the amplitude of voltage of the breaker body both sides, the amplitude of electric current,
Current-rising-rate, when the voltage and/or electric current amplitude and/or current-rising-rate more than voltage threshold, current threshold,
During climbing threshold value, the control system controls the breaker body break-make by the operating mechanism.
In one embodiment of the self-excited oscillation type dc circuit breaker of the present invention, the control system is additionally operable to, according to
The corresponding ring of the current information of the operating mechanism, information of voltage, ambient temperature information and the voltage of the operating mechanism for prestoring, electric current
The delay curve of border temperature, calculates the response time T1 for obtaining two contact separation to insulation distance；According to the breaker
The electric current of body and magnitude of voltage, current-rising-rate and contact displacement information, calculate little through the electric current of the breaker body
In or time T2 equal to current setting value；According to the response time T1 and time T2, by adjusting the operating mechanism
Voltage, the size of electric current adjust the speed of the contact separation, make two contact in the electric current through the breaker body
Separate to insulation distance less than or equal to during current setting value.
The present invention also provides a kind of control method of self-excited oscillation type dc circuit breaker, the self-excited oscillation type direct current interruption
Device includes control system, protection branch road, breaker body and LC oscillating circuit；The breaker body is used for controlling HVDC
The break-make of transmission system, the breaker body include operating mechanism, and operating mechanism is used for driving two contacts of breaker body
Separate or contact is to realize separating brake or combined floodgate；The LC oscillating circuit includes electric capacity and the inductance being connected in series；The protection
Road is in parallel with the LC oscillating circuit, and the control system is connected with the operating mechanism, and methods described includes：First control described
Two contact separation of breaker body produce electric arc, then control two contact to be less than in the electric current through the breaker body
Or separate to insulation distance when being equal to current setting value.
In one embodiment of the control method of the self-excited oscillation type dc circuit breaker of the present invention, the self-excited oscillation type
Dc circuit breaker also includes signal acquiring system, and the signal acquiring system is used for gathering the voltage letter of the breaker body
The current information of breath, current information and the operating mechanism, information of voltage, ambient temperature information and contact displacement letter
Breath.
In one embodiment of the control method of the self-excited oscillation type dc circuit breaker of the present invention, the self-excited oscillation type
Dc circuit breaker also includes signal processing system, and the signal processing system includes filter circuit, the amplifying circuit being connected in series
And A/D converter.
In one embodiment of the control method of the self-excited oscillation type dc circuit breaker of the present invention, methods described is also wrapped
Include, the control system calculates the breaker body both sides according to the information of voltage of the breaker body, current information
The amplitude of voltage, the amplitude of electric current, current-rising-rate, when the amplitude and/or current-rising-rate of the voltage and/or electric current are more than
When voltage threshold, current threshold, climbing threshold value, the control system controls the open circuit by the operating mechanism
Device body break-make.
In one embodiment of the control method of the self-excited oscillation type dc circuit breaker of the present invention, the control described two
Contact is separated when the electric current through the breaker body is less than or equal to current setting value to be included to insulation distance：According to institute
State the corresponding environment of the current information of operating mechanism, information of voltage, ambient temperature information and the voltage of the operating mechanism for prestoring, electric current
The delay curve of temperature, calculates the response time T1 for obtaining two contact separation to insulation distance；According to the breaker sheet
The electric current of body and magnitude of voltage, current-rising-rate and contact displacement information, calculate the electric current through the breaker body and are less than
Or the time T2 equal to current setting value；According to the response time T1 and time T2, by adjusting the electricity of the operating mechanism
Pressure, the size of electric current adjust the speed of the contact separation, make two contact little in the electric current through the breaker body
In or be equal to current setting value when separate to insulation distance.
In the present invention, self-excited oscillation type dc circuit breaker produces oscillating current by LC oscillating circuit, and oscillating current is big
The little electric current that can contend with DC transmission system makes to flow through the current over-zero of breaker body or smaller.Self-excited oscillation type direct current
Only need to be with control system, protection branch road, breaker body in parallel, LC oscillating circuit in breaker；Solve mechanical straight
Stream breaker is in the application difficult problem in mesohigh field.With low cost, logical compared to all solid state breaker that is used mostly at this stage
State loss is little, sturdy and durable.
Description of the drawings
Fig. 1 is the self-excited oscillation type breaker topological structure sketch of first embodiment of the invention.
Fig. 2 is that the self-excited oscillation type dc circuit breaker electric current of Fig. 1 cut-offs oscillogram.
Fig. 3 is the control principle drawing of the self-excited oscillation type dc circuit breaker of Fig. 1.
Fig. 4 is the fundamental diagram of the self-excited oscillation type dc circuit breaker of Fig. 1.
Fig. 5 is the flow chart of the control method of the self-excited oscillation type dc circuit breaker of Fig. 1.
Specific embodiment
For further illustrating that the present invention is to reach technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Accompanying drawing and preferred embodiment, to proposing specific embodiment, structure, feature and its effect according to the present invention, after describing in detail such as.
Fig. 1 is the self-excited oscillation type breaker topological structure sketch of first embodiment of the invention.Fig. 1 is referred to, one kind is certainly
Induced Oscillation formula dc circuit breaker, including breaker body HSS, LC oscillating circuit in parallel, protection branch road.Breaker body HSS
For controlling the break-make of HVDC transmission system, breaker body includes operating mechanism, and operating mechanism is used for controlling breaker
, to realize separating brake or combined floodgate, preferred operating mechanism is motor for the contact separation of body or contact, and motor is from reception control instruction
To completing the response time of separating brake within 250us.Per phase breaker by a motor control, every motor is according to control system
Instruction complete operation.
Protection branch road is a kind of resistance device MOV with nonlinear wind vibration, is mainly used in bearing overvoltage in circuit
Shi Jinhang voltage clamping, absorbs unnecessary electric current to protect Sensitive Apparatus.MOV is also referred to as VDR, VSR.The resistance of protection branch road device
Body material is semiconductor, so it is a kind of semiconductor resistor." zinc oxide " (ZnO) protection for using in a large number now
Branch road device, its material of main part have diad zinc (Zn) and hexad oxygen (O) to be constituted.So coming from the angle of material
See, zinc oxide protection branch road device is a kind of " II-VI race's oxide semiconductor ".In TaiWan, China, branch road device is protected to be referred to as " surging
Absorber ", otherwise referred to as " surge (surge) suppressor (absorber) ".
Protection branch road is a kind of votage limit type protection device.Using the nonlinear characteristic of protection branch road, when overvoltage is occurred in
Two interpolars of protection branch road, protection branch road can be by voltage clamping to a relatively-stationary magnitude of voltage, so as to realize to rear class
The protection of circuit.The major parameter of protection branch road has：Pressure sensitive voltage, discharge capacity, junction capacity, response time etc..
The response time of protection branch road is ns level, faster than gas-discharge tube, slightly slower than TVS pipe, generally uses
Requirement can be met in its response speed of overvoltage protection of electronic circuit.The junction capacity of protection branch road is typically hundreds of to thousand of
The order of magnitude scope of Pf, should not be directly applied in the protection of high-frequency signal circuit in many cases, apply in alternating current circuit
When in protection, because its junction capacity increases leakage current compared with conference, need to take into full account when protection circuit is designed.Protection branch road
Discharge capacity is larger, but less than gas-discharge tube.Protection branch road device abbreviation VDR, is a kind of to the non-linear excessively electric of voltage-sensitive
Pressure protection semiconductor element.
In other embodiments, protection branch road is NTC themistor, PTC themistor, TVS pipe circuit brake
Part.The resistance value of NTC (Negative Temperature Coefficient) thermal resistor reduces with the rising of temperature.
Both the surge current of suppression circuit can be made into using this characteristic, and this is that have a specified zero power due to NTC themistor
Rate resistance value, when which is connected in electric power loop, it is possible to effectively suppress power-on surge current.PTC thermistor is one
The semiconductor resistor that typical case has temperature sensitivity is planted, during more than certain temperature (Curie temperature), its resistance value is with temperature
Rising the increasing in step evolution of degree.The high energy of moment is stood at TVS pipe (TRANSIENT VOLTAGE SUPPRESSOR) two ends
During stroke, it can make its impedance reduce suddenly with high speed (up to 1*10-12 second), while absorbing a big electricity
Stream, by the voltage clamp between its two ends one predetermined numerically, so that it is guaranteed that component below is from transient state high energy
The impact of amount and damage.
Fig. 2 is that the self-excited oscillation type dc circuit breaker electric current of Fig. 1 cut-offs oscillogram.Refer to Fig. 2 breaker body HSS to touch
In point separation process, the LC oscillating circuit for being connected in parallel on HSS two ends produces the oscillating current that an amplitude is gradually increased, and manufactures one
Individual artificial zero crossing is used for auxiliary circuit breaker blow-out.Oscillating current amplitude is gradually increased, when increasing to a certain extent, due to being
The presence amplification of system resistance is no longer obvious, and electric current has a zero crossing in short-term repeatedly, and breaker passes through this zero crossing
The time of having a rest is obtained, dielectric insulation ability is restored, and arc extinction, final major loop are realized electric current and cut-off.Major loop cut-offs
After completing, electric current is transferred to LC oscillating circuit, and system continues to charge to oscillating circuit, when oscillating circuit voltage exceedes protection
During the voltage threshold on road, protection branch road punctures, and whole interrupting process is completed.
Fig. 3 is the control principle drawing of the self-excited oscillation type dc circuit breaker of Fig. 1.Fig. 3 is referred to, self-excited oscillation type direct current breaks
Road device also includes signal acquiring system, signal processing system, control system.Signal acquiring system is included for gathering HVDC
The information of voltage of transmission system, the first voltage sensor of current information, the first current sensor.
The signal that signal acquiring system is collected by signal processing system is filtered, amplifies, A/D conversion process；It is preferred that
Signal processing system analog-to-digital conversion is carried out using speed A/D converter more than sample frequency 450K, after completing analog-to-digital conversion
Process signal is exported and is processed to control system.Signal processing system includes filter circuit, the amplifying circuit being connected in series
And A/D converter, but it is not limited.
Control system completes the analysis of process signal, including analyzing HVDC transmission system current-rising-rate di/dt, when
The electric current of HVDC transmission system more than current setting value when or di/dt judge main HVDC more than climbing setting value
Transmission system is short-circuited fault, and control system sends the operational order of separating brake or combined floodgate to operating mechanism.
Operating mechanism completes separating brake or combined floodgate according to control instruction after the control instruction that control system sends is received
Operation, the control instruction for 10-30mA current signal.Control system includes following part but is not limited to：Data signal is defeated
Enter circuit, processor, digital signal output circuit, relay and power supply.
Signal acquiring system is also included for breaker body opening and closing state and contact displacement information, operating mechanism
The displacement transducer of voltage, current information and ambient temperature information, second voltage sensor, the second current sensor, temperature
Sensor.The change of environment temperature can bring the change of the voltage x current of motor control loop to delay that motor works, therefore
Motor action can be accurately controlled by ambient temperature compensation motor control, realize more accurately breaking-closing operating.This
Process includes：The voltage of signal acquiring system collection motor, electric current and temperature signal.Signal processing system receive signal it
Afterwards, complete to filter, amplify, A/D conversion operation, export to control system.After control system receives motor signal, according to reality
The delay curve of the motor lag characteristic that is currently stored in control system environment temperature corresponding with voltage x current is contrasted, by linear
The method of interpolation, the action for accurately calculating motor postpone.According to transmission system electric current and magnitude of voltage, current-rising-rate prediction behaviour
Make the zero-acrross ing moment of the LC vibration of the arc load generation of mechanism opening process, the environment temperature of collection motor, electric current, voltage enter
Row compensation, makes contact sufficiently large in the spacing of zero-acrross ing moment.
There are open command such as t1 moment, two contacts to operating mechanism in control system in one embodiment of the invention
Certain distance S1 is separated, is made breaker both sides voltage increase to setting voltage and is kept for a period of time, lc circuit charges, lc circuit
Through vibrating after a while, oscillating current be sized to the to contend with electric current of DC transmission system makes to flow through the electric current of breaker body
Zero passage is smaller, and control system calculates zero-acrross ing moment during two contact separation certain distance S1, and control contact is in mistake
Zero moment is rapidly separated S2.
In one embodiment of the invention, in signal processing system filter circuit, amplifying circuit and AD can be connect simultaneously
Enter multiple signals to be processed.Signal is admitted to control system circuit after treatment.Control system circuit combines the electricity for measuring
The magnitude of voltage of machine control loop, current value and the environment temperature that the collects line current zero crossing moment respectively to being predicted
Compensate, and then the time delay of operating mechanism action is adjusted, realize precise control Motor drive contact of breaker and specifying
Moment opens.
Fig. 4 is the fundamental diagram of the self-excited oscillation type dc circuit breaker of Fig. 1.Fig. 4 is referred to, is detecting system generation
After short circuit, control controller sends separating brake instruction, mechanism opening to breaker body.Now electric arc can be produced between contact,
Due to negative resistance and the unstability of electric arc, arc load meeting and be connected in parallel on its two ends vibration branch road formed one vibration.Two
Person can integrally regard a underdamped second-order system as, and system oscillation amplitude is gradually increased so that major loop produces a succession of
Zero crossing.During current over-zero, breaker obtains of short duration time of having a rest, recovers insulation, when dielectric strength reach permissible
During the voltage of opposing system, breaker fracture no longer punctures, and cut-offs and completes.Now major loop is filled to tank circuit inductance
Electricity, when capacitance voltage exceedes the protection branch road threshold value for being connected in parallel on its two ends, protection branch road punctures, and whole interrupting process is completed.
Whole process requires high to actuation time of breaker mechanism, it is desirable to breaker hundreds of delicate interior must complete to cut-off dynamic
Make.This patent have chosen that dispersiveness is less, and, used as operating mechanism, the motor can be in 250us for actuation time shorter motor
Execution, meets demand.
Preferred control system is connected with interactive module, and interactive module includes LCD display, control button, communication system
It is used for showing circuit-breaker status Deng, LCD display, control button is used for sending operation by control system to operating mechanism and refers to
Order.
Fig. 5 is the flow chart of the control method of the self-excited oscillation type dc circuit breaker of Fig. 1.Refer to Fig. 5 the present embodiment
A kind of control method of self-excited oscillation type dc circuit breaker, including
S501, two contact separation of the control breaker body produce electric arc.At this moment two contact meetings of breaker body
Potential difference, i.e. arc voltage is produced, arc voltage can be charged to LC oscillating circuit, LC oscillating circuit is made through vibration after a while
Can the contend with electric current of DC transmission system of size of current makes current over-zero or smaller.
S502, control two contact are less than or equal to the current setting value time-division in the electric current through the breaker body
From to insulation distance.Current information according to the operating mechanism, information of voltage, ambient temperature information is specifically included, is prestored
The voltage of operating mechanism, electric current correspond to the delay curve of environment temperature, calculate and obtain two contact separation to insulation distance
Response time T1；According to electric current and the magnitude of voltage of the breaker body, current-rising-rate, contact displacement information, calculate through
Cross the time T2 of the electric current less than or equal to current setting value of the breaker body；According to the response time T1 and time
T2, adjusts the speed of the contact separation, so that two contact is existed by adjusting the voltage of the operating mechanism, the size of electric current
Separate to insulation distance when the electric current of the breaker body is less than or equal to current setting value.
To sum up, the present invention at least has the following advantages that:
In the present invention, self-excited oscillation type dc circuit breaker only need to be with control system, protection branch road, breaker in parallel
Body, LC oscillating circuit；The present invention solves an application difficult problem of the mechanical dc circuit breaker in mesohigh field.Compared to existing rank
The all solid state breaker that is used mostly of section is with low cost, on-state loss is little, sturdy and durable.
Invention increases negative feedback links, the voltage and current signal of environment temperature, operation motor is fed back to control system
System so that contact can accurately be opened in the expected moment, realizes accurate point, closing operation.
More than, it is only presently preferred embodiments of the present invention, not makees any pro forma restriction to the present invention, although this
Invention is disclosed above with preferred embodiment, but is not limited to the present invention, any those skilled in the art,
In the range of technical solution of the present invention, when the technology contents using the disclosure above make a little change or are modified to equivalent
The Equivalent embodiments of change, as long as be that the technical spirit according to the present invention is to above real without departing from technical solution of the present invention content
Any simple modification, equivalent variations and modification that example is made is applied, is all still fallen within the range of technical solution of the present invention.
Claims (10)
1. a kind of self-excited oscillation type dc circuit breaker, it is characterised in that including control system, protection branch road, breaker body and
LC oscillating circuit；The breaker body is used for controlling the break-make of HVDC transmission system, and the breaker body includes behaviour
Make mechanism, operating mechanism is used for two contact separation of breaker body or contact being driven to realize separating brake or combined floodgate；The LC shakes
Swing electric capacity and inductance that circuit includes to be connected in series；The protection branch road is in parallel with the LC oscillating circuit, the protection branch road
During for the voltage at the LC oscillating circuit two ends more than or equal to voltage setting value, voltage clamping is carried out；
The control system is connected with the operating mechanism, and the control system is used for controlling two contacts of the breaker body
Separate and electric arc is produced, then control two contact when the electric current through the breaker body is less than or equal to current setting value
Separate to insulation distance.
2. self-excited oscillation type dc circuit breaker according to claim 1, it is characterised in that the self-excited oscillation type direct current breaks
Road device also includes signal acquiring system, and the signal acquiring system is used for gathering information of voltage, the electric current of the breaker body
The current information of information and the operating mechanism, information of voltage, ambient temperature information and the contact displacement information.
3. self-excited oscillation type dc circuit breaker according to claim 1, it is characterised in that the self-excited oscillation type direct current breaks
Road device also includes signal processing system, and the signal processing system includes that the filter circuit being connected in series, amplifying circuit and A/D turn
Parallel operation.
4. self-excited oscillation type dc circuit breaker according to claim 2, it is characterised in that the control system is additionally operable to root
The amplitude of the voltage of the breaker body both sides, electric current is calculated according to the information of voltage of the breaker body, current information
Amplitude, current-rising-rate, when the amplitude and/or current-rising-rate of the voltage and/or electric current are more than voltage threshold, electric current door
When limit value, climbing threshold value, the control system controls the breaker body break-make by the operating mechanism.
5. self-excited oscillation type dc circuit breaker according to claim 1, it is characterised in that the control system is additionally operable to,
Current information, information of voltage, the voltage of ambient temperature information and the operating mechanism for prestoring according to the operating mechanism, electricity
The delay curve of the corresponding environment temperature of stream, calculates the response time T1 for obtaining two contact separation to insulation distance；
According to electric current and magnitude of voltage, current-rising-rate and the contact displacement information of the breaker body, calculate through described
The electric current of breaker body is less than or equal to the time T2 of current setting value；
According to the response time T1 and time T2, by adjusting described in the voltage of the operating mechanism, the size adjustment of electric current
The speed of contact separation, makes two contact in the electric current through the breaker body less than or equal to the current setting value time-division
From to insulation distance.
6. a kind of control method of self-excited oscillation type dc circuit breaker, it is characterised in that the self-excited oscillation type dc circuit breaker
Including control system, protection branch road, breaker body and LC oscillating circuit；The breaker body is used for controlling high-voltage dc transmission
The break-make of electric system, the breaker body include operating mechanism, and operating mechanism is used for driving two contacts of breaker body to divide
From or contact to realize separating brake or combined floodgate；The LC oscillating circuit includes electric capacity and the inductance being connected in series；The protection branch road
In parallel with the LC oscillating circuit, the control system is connected with the operating mechanism,
Methods described includes：First control two contact separation of the breaker body that electric arc is produced, then control two contact to exist
Separate to insulation distance when the electric current of the breaker body is less than or equal to current setting value.
7. the control method of self-excited oscillation type dc circuit breaker according to claim 6, it is characterised in that described from exciting
Swinging formula dc circuit breaker also includes signal acquiring system, and the signal acquiring system is used for gathering the voltage of the breaker body
Information, the current information of current information and the operating mechanism, information of voltage, ambient temperature information and contact displacement letter
Breath.
8. the control method of self-excited oscillation type dc circuit breaker according to claim 6, it is characterised in that described from exciting
Swinging formula dc circuit breaker also includes signal processing system, and the signal processing system includes filter circuit, the amplification being connected in series
Circuit and A/D converter.
9. the control method of self-excited oscillation type dc circuit breaker according to claim 7, it is characterised in that methods described is also
Including the control system is according to information of voltage, the current information calculating breaker body both sides of the breaker body
The amplitude of voltage, the amplitude of electric current, current-rising-rate, when the amplitude and/or current-rising-rate of the voltage and/or electric current are big
When voltage threshold, current threshold, climbing threshold value, the control system is controlled described disconnected by the operating mechanism
Road device body break-make.
10. the control method of self-excited oscillation type dc circuit breaker according to claim 6, it is characterised in that the control
Two contact is separated when the electric current through the breaker body is less than or equal to current setting value to be included to insulation distance：
Current information, information of voltage, the voltage of ambient temperature information and the operating mechanism for prestoring according to the operating mechanism, electricity
The delay curve of the corresponding environment temperature of stream, calculates the response time T1 for obtaining two contact separation to insulation distance；
According to electric current and magnitude of voltage, current-rising-rate and the contact displacement information of the breaker body, calculate through described
The electric current of breaker body is less than or equal to the time T2 of current setting value；
According to the response time T1 and time T2, by adjusting described in the voltage of the operating mechanism, the size adjustment of electric current
The speed of contact separation, makes two contact in the electric current through the breaker body less than or equal to the current setting value time-division
From to insulation distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610953690.1A CN106486965A (en) | 2016-11-03 | 2016-11-03 | A kind of dc circuit breaker of self-excited oscillation type and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610953690.1A CN106486965A (en) | 2016-11-03 | 2016-11-03 | A kind of dc circuit breaker of self-excited oscillation type and its control method |
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| CN106486965A true CN106486965A (en) | 2017-03-08 |
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| CN201610953690.1A Pending CN106486965A (en) | 2016-11-03 | 2016-11-03 | A kind of dc circuit breaker of self-excited oscillation type and its control method |
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| CN107069654A (en) * | 2017-05-24 | 2017-08-18 | 国家电网公司 | A kind of two-way hybrid dc circuit breaker and cutoff method for middle voltage distribution networks |
| CN110323721A (en) * | 2018-03-30 | 2019-10-11 | 全球能源互联网研究院有限公司 | A kind of mechanical self-excited oscillation mode dc circuit breaker, parameter determination method and device |
| CN111740389A (en) * | 2020-06-05 | 2020-10-02 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | High-breaking-performance direct-current circuit breaker suitable for reclosing and switching-on and switching-off method |
| WO2020198986A1 (en) * | 2019-03-29 | 2020-10-08 | Siemens Aktiengesellschaft | Solid state circuit breaker, method for operating same, and control apparatus of solid state circuit breaker |
| CN114336498A (en) * | 2020-09-29 | 2022-04-12 | 中国移动通信集团设计院有限公司 | Direct current breaker and direct current breaking system |
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| CN107069654A (en) * | 2017-05-24 | 2017-08-18 | 国家电网公司 | A kind of two-way hybrid dc circuit breaker and cutoff method for middle voltage distribution networks |
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| CN114336498A (en) * | 2020-09-29 | 2022-04-12 | 中国移动通信集团设计院有限公司 | Direct current breaker and direct current breaking system |
| CN114336498B (en) * | 2020-09-29 | 2024-03-19 | 中国移动通信集团设计院有限公司 | DC circuit breaker and DC circuit breaking system |
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Application publication date: 20170308 |