CN106786416A - A kind of two-way variable-pressure HVDC tripper and short trouble cutting method - Google Patents
A kind of two-way variable-pressure HVDC tripper and short trouble cutting method Download PDFInfo
- Publication number
- CN106786416A CN106786416A CN201611095011.8A CN201611095011A CN106786416A CN 106786416 A CN106786416 A CN 106786416A CN 201611095011 A CN201611095011 A CN 201611095011A CN 106786416 A CN106786416 A CN 106786416A
- Authority
- CN
- China
- Prior art keywords
- breaker
- voltage
- output
- inner ring
- outer shroud
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a kind of two-way variable-pressure HVDC tripper and short trouble cutting method; including breaker and control system; wherein; control system includes inner ring regulation control electric current, outer shroud regulation control voltage, is controlled by adjusting the transformation and protection that increase pilot controller to carry out high voltage DC breaker in two close cycles；The present invention is realized has the advantages that more functions compared to conventional high-tension breaker, to cut-off speed fast, cost-effective, the bidirectional voltage boosting and buck functionality of breaker can be realized when HVDC transmission system normally runs, it is possible to achieve be flexibly applied in the power circuit of different voltage class；Simultaneously, it is also possible to which realization is timely and effectively cut off when transmission line of electricity is short-circuited failure to short trouble, the purpose of protection high-voltage direct-current transmission system and load equipment is realized.
Description
Technical field
The present invention relates to line protection research field, in particular it relates to a kind of become based on new full-bridge topology
The two-way variable-pressure HVDC tripper of parallel operation and the cutting method of variable-pressure high voltage DC breaker short trouble.
Background technology
In high-voltage AC transmission system, normal input and the accident excision of transmission line of electricity are by high-voltage alternating open circuit
Device is realized.And be then temporary to eliminate using the control of converter valve control (grid) pole in HVDC transmission system
Failure or when be short-circuited failure when cut off using mechanical high-voltage breaker, but with VSC-HVDC technology of transmission of electricitys
Development and application, are difficult to meet the quick excision of short trouble because the response time of mechanical high voltage DC breaker is long
Demand.Therefore, development of new quick high-pressure dc circuit breaker is very necessary to promote the development of HVDC transmission system.
ABB AB have developed the hybrid high voltage DC breaker of First in the world in November, 2012, by mechanical kinetics and electricity
Power electronic equipment is combined, and an output current for power large-scale electric generating station can be disconnected within several milliseconds, and this causes on a large scale may be used
The efficient integrated and exchange of the renewable sources of energy and construction new high efficiency power network carry out remote distance power transmission and are possibly realized.Straightening high
The type for flowing breaker mainly has mechanical breaker, solid circuit breaker, hybrid circuit breaker, Z-source breakers and is based on
The breaker of converter.Can only be cut-off unlike normal operating current from HVDC change-over switch, high voltage DC breaker
Cut-out ability with fault current.
Current mechanical high-voltage dc circuit breaker, can be in several ms internal cutting off short circuit current, this fault current
Cut-off velocity can not still meet the requirement of new VSC-HVDC transmission systems.Solid circuit breaker can easily overcome and cut-off
The limitation of speed, but a large amount of losses can be produced in steady-state operation.Hybrid circuit breaker has the good static state of mechanical chopper concurrently
The dynamic characteristic of characteristic and solid circuit breaker thick-less vane, with running wastage is low, long service life, reliability be high and stabilization
Property it is good the advantages of, it is but very high for the manufacture requirement of quick disconnecting link, and switch off time also suffer from the influence of quick disconnecting link with
And the influence of protection system and call duration time.In addition to the above-mentioned mode for directly cut-offfing short circuit current, it is also contemplated that increase
Current limiter coordinates the mode of killer switch electric current, because the mechanical switch for needing blow-out, electric current is bigger, and blow-out is more tired
It is difficult；And for the power electronic devices without blow-out, shut-off high current can cause the dynamic over-voltage of device, current amplitude is bigger,
Overvoltage is higher.
In sum, present inventor has found above-mentioned technology extremely during the present application technical scheme is realized
There is following technical problem less：
In the prior art, there is the technology that cannot simultaneously realize stepping functions and breaker function in existing breaker
Problem.
The content of the invention
It is existing disconnected the invention provides a kind of two-way variable-pressure HVDC tripper and short trouble cutting method
There is the technical problem that cannot simultaneously realize stepping functions and breaker function in road device, realize HVDC tripper energy
Enough technique effects for realizing stepping functions and breaker function simultaneously.
In order to solve the above technical problems, this application provides a kind of two-way variable-pressure based on new full-bridge topology converter
HVDC tripper, including breaker and control system, wherein：Breaker includes being connected to the IGBT switches of positive input terminal
Module group S1, IGBT switch module groups S1Negative electrode be connected to IGBT switch module groups S3Anode and inductance L inputs, inductance L
Output end be connected to IGBT switch module groups S2Negative electrode and diode (led) module group D1Negative electrode, IGBT switch module groups S2's
Anode is connected with positive output end.Input capacitance C is connected between positive input terminal and negative input endi, positive output end and negative output terminal
Between be connected with output capacitance Co.IGBT switch modules S3Negative electrode, diode (led) module group D1Anode, breaker negative input end
It is connected with breaker negative output terminal and is grounded simultaneously；Control system includes the outer shroud pi regulator, the outer ring filling that are sequentially connected
Link, inner ring pi regulator, inner ring saturation element, PWM generator and high voltage DC breaker, voltage sensor are collected
The output end voltage v of high voltage DC breakero, output end voltage voBy being referred to output voltage after outer shroud low pass filter LPF
Value vo *It is compared and is then input to outer shroud pi regulator, current sensor collects the inductive current in high voltage DC breaker
iL, inductive current iLBy the inner ring inductive current reference value i exported with outer shroud saturation element after inner ring low pass filter LPFL *
It is compared, result of the comparison input inner ring pi regulator also increases between described inner ring saturation element and PWM generator
There is a pilot controller.Two-way variable-pressure high voltage DC breaker operation based on new full-bridge topology converter of the invention
During conducting state, power switch group S1And S2Conducting, power flows through LdcCharge, power switch group S1During off-state, LdcThe energy of storage
Amount is by diode continuousing flow or by power switch group S2And S3Conducting afterflow, operational modal during continuous current mode,
Individual switch periods TsIt is interior, it is zero to draw equation in the case where loss is disregarded by the DC voltage average value of inductance, calculate point
Analysis formula is as follows：
ViDTs+(-Vo)(1-D)Ts=0
As available from the above equation, the relation between output voltage and input voltage is：
Wherein D is dutycycle, and calculating formula is as follows：
Wherein, ViIt is input voltage, D is dutycycle, TsIt is switch periods, VoIt is output voltage, tonIt is switch periods.By
Above-mentioned formula understands that the performance of the improved topology works as D similar in appearance to full-bridge topology converter>When 0.5, output voltage is more than defeated
Enter voltage；Work as D<When 0.5, output voltage is less than input voltage；As D=0.5, output voltage and input voltage are equal；Auxiliary
Controller carries out zero value detection to dutycycle, when null value is detected, judges malfunction, performs selecting switch operation, cuts
Broken string road, until failture evacuation, after recovering normal, zero tester detects that dutycycle is not zero, and judges to belong to normal shape
State, is failure to actuate, and thus by the detection and regulation of dutycycle, it is possible to achieve the function of breaker, short circuit is cut in time
It is disconnected, that is to say, that the pilot controller can ensure the normal execution of breaker stepping functions when breaker normally runs,
Rapidly short trouble can timely and effectively be cut off when transmission line of electricity is short-circuited failure again, be realized protection high pressure
Direct current transportation equipment and load equipment, above is operation principle during forward direction transmission of electricity, reversely transmits electricity when principle during transmission of electricity and forward direction
Identical, the energy stream simply transmitted is in opposite direction.
Described pilot controller includes zero tester and selecting switch, and wherein zero tester includes a zero passage ratio
Compared with device and a triggering subsystem, the output signal of inner ring saturation element is sent to zero-crossing comparator and triggering subsystem simultaneously,
The condition that wherein output signal of zero-crossing comparator is turned on as triggering subsystem, triggers the output signal of subsystem by reverse
Device is exported to selecting switch, and two inputs of selecting switch connect with the output end and signal value of zero of inner ring saturation element respectively
Connect.Concretely, pilot controller mainly includes selecting switch and zero tester, and wherein zero tester is by a zero passage
Comparator and one triggering subsystem constitute, trigger subsystem ON operation condition be zero-crossing comparator output signal,
I.e. when the output signal of zero-crossing comparator is more than zero, its output signal 1, this step signal causes to trigger subsystem
Conducting, output pulse causes that selecting switch is acted, and carries out the excision of line short fault.
Present invention also provides a kind of cutting method of variable-pressure high voltage DC breaker short trouble, including (a) outer shroud
Rate-determining steps, (b) inner ring rate-determining steps, (c) auxiliary rate-determining steps.
Wherein (a) inner ring rate-determining steps are comprised the following steps：
(a1) voltage sensor collects the output end voltage v of high voltage DC breakero；
(a2) output end voltage voBy after outer shroud low pass filter LPF with output end voltage reference value vo *It is compared；
(a3) result of the comparison is input to outer shroud pi regulator and outer shroud saturation element is adjusted, output inner ring inductance electricity
Stream reference value iL *。
Wherein (b) inner ring rate-determining steps are comprised the following steps：
(b1) current sensor collects the inductive current i in high voltage DC breakerL；
(b2) by inductive current iLFeedback signal is obtained after low pass filter LPF filters out higher hamonic wave；
(b3) by feedback signal and output voltage reference value iL *It is compared；
(b4) result of the comparison exports breaker duty again through inner ring pi regulator, the adjustment effect of inner ring saturation element
Compare D；
(b5) the output signal D that step (b4) is obtained is modulated through PWM generator, controls high voltage DC breaker reality
Existing transformation and failure removal function.
Wherein (c) auxiliary rate-determining steps are comprised the following steps：
(c1) when HVDC transmission system normally runs, dutycycle D keeps a stationary value, in selecting switch connection
Ring filling link input；
(c2) when HVDC transmission line short trouble occurs, dutycycle D is zero by stationary value rapid decrease；
(c3) it is 1 that zero-crossing comparator is compared output valve, triggers subsystem ON operation；
(c4) at the moment of input d value vanishing, export from 0 to 1 band rising edge step signal, then by reverse
Device, triggering subsystem is output as having carved band trailing edge step signal from 1 to 0 in that of D value vanishing；
(c5) selecting switch receive reverser input trailing edge step signal after, from upper end position be switched to lower end position with
Signal value of zero is connected the zero setting of D values and kept, until failure is completely isolated and removes.
The cutting method of the variable-pressure high voltage DC breaker short trouble in the application, using in double loop control
The step of increasing an auxiliary controlled output breaker dutycycle D, such that it is able to realize the short circuit event of HVDC transmission line
Barrier status monitoring, when hvdc transmission line is in short-circuit condition, the dutycycle for exporting breaker changes so as to reflect
Transmission line of electricity is short-circuited failure, so as to realize line disconnection, plays the purpose of protection, relative to the open circuit of existing HVDC
For device, with transformation function, high speed reaction, quick execution, the cut-out response time only needs to 6.5ms or so, relative to machinery
It is a very short time for formula and hybrid high voltage DC breaker, with larger advantage, without electric using other
Fault curre is limited in a very safe scope in the case of stream limiter, after failure is removed, by weight
Pilot controller is put, control system can be enable to return to normal working condition.The output end electricity of outer shroud regulation control breaker
Pressure vo：Voltage sensor collects high voltage DC breaker output end voltage vo, height is filtered out by outer shroud low pass filter LPF
Feedback signal and output voltage reference value v after subharmonico *It is compared, then acts on defeated through pi regulator regulation and saturation element
Go out the reference value i of inner ring inductive current regulation controlL *, computing formula is as follows：
Inner ring regulation control inductive current iL：Current sensor collects inductive current i in high voltage DC breakerL, pass through
Inner ring low pass filter LPF filters out the feedback signal after higher hamonic wave and output voltage reference value iL *It is compared, then through PI
Adjuster is adjusted and saturation element effect output breaker dutycycle D, is calculated as formula is as follows：
Undesirable in traditional double closed loop control method in order to solve the problems, such as, the present invention to dutycycle using carrying out null value inspection
Survey to be controlled：When an error occurs, due to the adjustment effect of two close cycles, D is declined and is reduced to quickly by original stationary value
Zero, now zero tester detect and just send a pulse to two-terminal switch, two-terminal switch receives triggering by the zero setting of D values and protects
Hold, until failure is completely isolated and removes, pulse signal failure, double-closed-loop control device recovers normal operation.
This application provides a kind of bidirectional high-pressure dc circuit breaker based on new full-bridge topology converter, including breaker
With control system, wherein control system include inner ring regulation control electric current, outer shroud regulation control voltage, adjusted by two close cycles
The transformation and protection for increasing pilot controller to carry out high voltage DC breaker are controlled.The present invention is realized compared to conventional high-tension
Breaker has the advantages that more functions, to cut-off speed fast, cost-effective, can normally be run in HVDC transmission system
The bidirectional voltage boosting and buck functionality of Shi Shixian breakers, it is possible to achieve be flexibly applied to the power circuit of different voltage class
In；Simultaneously, it is also possible to which realization timely and effectively cuts off short trouble when transmission line of electricity is short-circuited failure, realize protecting
The purpose of shield high-voltage direct-current transmission system and load equipment.
The present invention compared with prior art, has the following advantages and advantages：
1st, the two-way variable-pressure high voltage DC breaker based on new full-bridge topology converter in the application, in equipment knot
On structure, only with three IGBT switch module groups, relative to four topologys of IGBT switch module groups of conventional full bridge, realizing
On the basis of equipment stepping functions and breaker function, equipment cost is greatly reduced, reduce equipment running wastage.Because
The IGBT switch modules group of the high voltage DC breaker needs very how expensive IGBT units connection in series-parallel to form, and
The dominant loss of the equipment comes from the switching loss and conduction loss of IGBT；
The two-way variable-pressure high voltage DC breaker based on new full-bridge topology converter in 2 the application, the method reality
Show compared to the more functions of conventional high-tension breaker.Breaker can be realized when HVDC transmission system normally runs
Bidirectional up-down pressure function, it is also possible to realization rapidly had in time to short trouble when transmission line of electricity is short-circuited failure
The excision of effect, realizes protection high-voltage direct-current transmission system and load equipment.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention；
Fig. 1 is the block diagram of Control and protection system of the present invention；
Fig. 2 is the topological diagram of the high voltage DC breaker of new full-bridge topology converter of the invention；
Fig. 3 is the topological diagram part A enlarged drawings of new full-bridge topology converter high voltage DC breaker of the invention；
Fig. 4 is the topological diagram part B enlarged drawings of new full-bridge topology converter high voltage DC breaker of the invention；
Fig. 5 be the operation logic figure of the high voltage DC breaker conducting phase of new full-bridge topology converter of the invention (just
To transmission of electricity)；
Fig. 6 be the operation logic figure of the high voltage DC breaker off-phases of new full-bridge topology converter of the invention (just
To transmission of electricity)；
Fig. 7 is that the operation logic figure of the high voltage DC breaker conducting phase of new full-bridge topology converter of the invention is (anti-
To transmission of electricity)；
Fig. 8 is that the operation logic figure of the high voltage DC breaker off-phases of new full-bridge topology converter of the invention is (anti-
To transmission of electricity)；
Fig. 9 is the work wave of the high voltage DC breaker based on new full-bridge topology converter；
Figure 10 is short trouble excision high pressure simulation result figure in present invention step-down；
Figure 11 is short trouble excision high pressure simulation result figure in present invention boosting；
Short trouble excision high pressure is imitated when Figure 12 is for new full-bridge topology converter high voltage DC breaker step-down of the invention
The corresponding low-pressure experiment the result figure of true result；
Figure 13 is the corresponding low pressure simulation result figures of Figure 12；
Short trouble excision high pressure is imitated when Figure 14 is for new full-bridge topology converter high voltage DC breaker boosting of the invention
The corresponding low-pressure experiment the result figure of true result；
Figure 15 is the corresponding low pressure simulation result figures of Figure 14.
Specific embodiment
It is existing disconnected the invention provides a kind of two-way variable-pressure HVDC tripper and short trouble cutting method
There is the technical problem that cannot simultaneously realize stepping functions and breaker function in road device, realize HVDC tripper energy
Enough technique effects for realizing stepping functions and breaker function simultaneously.
It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention
Mode is applied to be further described in detail the present invention.It should be noted that in the case where not conflicting mutually, the application's
Feature in embodiment and embodiment can be mutually combined.
Many details are elaborated in the following description in order to fully understand the present invention, but, the present invention may be used also
Implemented with the other modes in the range of using other being different from being described herein, therefore, protection scope of the present invention do not receive down
The limitation of specific embodiment disclosed in face.
Embodiment one：
In embodiment one, Fig. 1 is refer to, there is provided a kind of two-way variable-pressure based on new full-bridge topology converter is high
Pressure dc circuit breaker, including breaker and control system, wherein breaker include being connected to the IGBT switch modules of positive input terminal
Group S1, IGBT switch module groups S1Negative electrode be connected to IGBT switch module groups S3Anode and inductance L inputs, inductance L's is defeated
Go out end and be connected to IGBT switch module groups S2Negative electrode and diode (led) module group D1Negative electrode, IGBT switch module groups S2Anode
It is connected with positive output end.Input capacitance C is connected between positive input terminal and negative input endi, between positive output end and negative output terminal
It is connected with output capacitance Co.IGBT switch modules S3Negative electrode, diode (led) module group D1Anode, breaker negative input end and disconnected
Road device negative output terminal is connected and is grounded simultaneously, specifically connects as shown in Fig. 2 the IGBT switch module groups in Fig. 2 are by multiple
IGBT module connection in series-parallel is formed, and partial enlarged drawing is as shown in figure 3, the diode (led) module group in Fig. 2 is by multiple diode (led) modules
Connection in series-parallel is formed, and partial enlarged drawing is as shown in Figure 4；Control system includes the outer shroud pi regulator, the outer shroud saturated rings that are sequentially connected
Section, inner ring pi regulator, inner ring saturation element, PWM generator and high voltage DC breaker, voltage sensor collect height
Press the output end voltage v of dc circuit breakero, output end voltage voBy after outer shroud low pass filter LPF with output voltage reference value
vo *It is compared and is then input to outer shroud pi regulator, current sensor collects the inductive current in high voltage DC breaker
iL, inductive current iLBy the inner ring inductive current reference value i exported with outer shroud saturation element after inner ring low pass filter LPFL *
It is compared, result of the comparison input inner ring pi regulator also increases between described inner ring saturation element and PWM generator
There are a pilot controller, power switch group S1During conducting, power flows through LdcCharge, power switch group S1During off-state, LdcDeposit
The energy of storage passes through diode continuousing flow, or by opening power switch group S2And S3Afterflow.
The primary cut-out operation logic figure and working waveform figure of the invention as shown in Figures 5 to 9, LdcThe selection of value is examined
Consider breaker and be operated in continuous mode, inductive current ripple factor 5%, the selection of output capacitance is considered in converter nominal operation
Output voltage ripple coefficient is 10% under state, and the impedance of transmission line is also contemplated among test, and line impedance value chooses multiterminal
The transmission line of 200km in straight-flow system, impedance is pressed 0.11155mH/km and 0.014 Ω/km and is calculated, line electricity in emulation testing
3 Ω and 20mH are elected in resistance and reactance as respectively.
Figure 10 and Figure 11 is that short trouble of the present invention cuts off high pressure simulation result figure, and wherein Figure 10 is step-down simulation result,
Figure 11 is boosting simulation result.It can be seen from fig. 10 that output end voltage drops to 100kV by 200kV, when output voltage is steady
After fixed, at the 0.6s moment, a short trouble, the quick vanishing of output end voltage now, fault current is added quickly to raise,
Also the rapid decrease in the presence of control system is zero to this dutycycle D, so as to reach shut-off IGBT switch modules group switch,
Realize the purpose of isolated fault.The result of same excision short trouble is as can be seen from Figure 11.Breaker of the invention is opened up
Flutterring can realize that boosting can also realize buck functionality, when circuit breaker failure occurs, effectively quickly can cut off short trouble.
Figure 12 and Figure 14 are the corresponding low-pressure experiment the result figures of short trouble excision high pressure simulation result of the present invention, its
Experimental result when middle Figure 12 is step-down, experimental result when Figure 14 is boosting.It can be seen that straightening high of the invention
Stream breaker topology can realize step up and step down transformer function, and short trouble excision function is also realized well.Figure 13
It is respectively Figure 12 low voltage low power simulation results corresponding with Figure 14, as can be seen from Fig., their waveform very with Figure 15
Cause, this also preferably demonstrates the validity of transformation function and breaker function in high pressure simulation result.
The present invention compared with prior art, has the following advantages and advantages：
1st, the two-way variable-pressure high voltage DC breaker based on new full-bridge topology converter in the application, in equipment knot
On structure, only with three IGBT switch module groups, relative to four topologys of IGBT switch module groups of conventional full bridge, realizing
On the basis of equipment stepping functions and breaker function, equipment cost is greatly reduced, reduce equipment running wastage.Because
The IGBT switch modules group of the high voltage DC breaker needs very how expensive IGBT units connection in series-parallel to form, and
The dominant loss of the equipment comes from the switching loss and conduction loss of IGBT；
The two-way variable-pressure high voltage DC breaker based on new full-bridge topology converter in 2 the application, the method reality
Show compared to the more functions of conventional high-tension breaker.Breaker can be realized when HVDC transmission system normally runs
Bidirectional up-down pressure function, it is also possible to realization rapidly had in time to short trouble when transmission line of electricity is short-circuited failure
The excision of effect, realizes protection high-voltage direct-current transmission system and load equipment.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification without deviating from essence of the invention to the present invention
God and scope.So, if these modifications of the invention and modification 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 these changes and modification.
Claims (6)
1. a kind of two-way variable-pressure HVDC tripper, it is characterised in that described device includes：Including breaker and control
System, wherein：
Breaker includes：It is connected to the IGBT switch module groups S of positive input terminal1, IGBT switch module groups S1Negative electrode be connected to
IGBT switch module groups S3Anode and inductance L inputs, the output end of inductance L is connected to IGBT switch module groups S2Negative electrode
With diode (led) module group D1Negative electrode, IGBT switch module groups S2Anode be connected with the positive output end of device；The positive input of device
Input capacitance C is connected between end and the negative input end of devicei, connected between the positive output end of device and the negative output terminal of device
There is output capacitance Co；IGBT switch modules S3Negative electrode, diode (led) module group D1Anode, the negative input end of device and device
Negative output terminal is connected and is grounded simultaneously；
Control system includes：Outer shroud pi regulator, outer shroud saturation element, inner ring pi regulator, the inner ring saturated rings being sequentially connected
Section, PWM generator；Voltage sensor collects the output end voltage v of high voltage DC breakero, output end voltage voBy outer shroud
With output voltage reference value v after low pass filter LPFo *It is compared, is then input to outer shroud pi regulator, current sensor is adopted
Collect the inductive current i in high voltage DC breakerL, inductive current iLBy after inner ring low pass filter LPF with outer shroud saturated rings
Save the inner ring inductive current reference value i of outputL *It is compared, result of the comparison input inner ring pi regulator, in inner ring saturated rings
Pilot controller is provided between section and PWM generator.
2. two-way variable-pressure HVDC tripper according to claim 1, it is characterised in that the pilot controller
Including：Zero tester and selecting switch, wherein, zero tester includes：Zero-crossing comparator and triggering subsystem, interior ring filling
The output signal of link is sent to zero-crossing comparator and triggering subsystem simultaneously, wherein, the output signal conduct of zero-crossing comparator
The condition of triggering subsystem conducting, the output signal for triggering subsystem is exported to selecting switch by reverser, selecting switch
Two inputs are connected with the output end and signal value of zero of inner ring saturation element respectively, and output end is connected with PWM generator.
3. two-way variable-pressure HVDC tripper according to claim 1, it is characterised in that computing formula is：
ViDTs+(-Vo)(1-D)Ts=0
Wherein, ViIt is input voltage, D is dutycycle, TsIt is switch periods, VoIt is output voltage, tonIt is switch periods.
4. a kind of variable-pressure HVDC tripper short trouble cutting method, is applied to any described in claim 1-3
Device in, it is characterised in that methods described includes：(a) outer shroud rate-determining steps；B () inner ring is controlled；The control of (c) auxiliary：
A the control of () outer shroud includes：
(a1) voltage sensor collects the output end voltage v of high voltage DC breakero；
(a2) output end voltage voBy after outer shroud low pass filter LPF with output end voltage reference value vo *It is compared；
(a3) result of the comparison is input to outer shroud pi regulator and outer shroud saturation element is adjusted, output inner ring inductive current ginseng
Examine value iL *；
B the control of () inner ring includes：
(b1) current sensor collects the inductive current i in high voltage DC breakerL；
(b2) by inductive current iLFeedback signal is obtained after low pass filter LPF filters out higher hamonic wave；
(b3) by feedback signal and output voltage reference value iL *It is compared；
(b4) result of the comparison is again through inner ring pi regulator, the adjustment effect of inner ring saturation element, output breaker dutycycle D；
(b5) the output signal D that step (b4) is obtained is modulated through PWM generator, control high voltage DC breaker is realized becoming
Pressure and failure removal function；
C the control of () auxiliary includes：
(c1) when HVDC transmission system normally runs, dutycycle D keeps a stationary value, selecting switch connection inner ring to satisfy
With link input；
(c2) when HVDC transmission line short trouble occurs, dutycycle D drops to zero by stationary value；
(c3) it is 1 that zero-crossing comparator is compared output valve, triggers subsystem ON operation；
(c4) at the moment of input d value vanishing, output is from 0 to 1 band rising edge step signal, then by reverser, touches
Hair subsystem is output as from the moment of D value vanishing the band trailing edge step signal from 1 to 0；
(c5) after selecting switch receives the trailing edge step signal of reverser input, lower end position and null value are switched to from upper end position
Signal is connected the zero setting of D values and kept, until failure is completely isolated and removes.
5. variable-pressure HVDC tripper short trouble cutting method according to claim 4, it is characterised in that：
Wherein, KpvFor voltage controls proportionality coefficient, dt is time diffusion variable, KivFor voltage controls integral coefficient.
6. variable-pressure HVDC tripper short trouble cutting method according to claim 4, it is characterised in that：
Wherein, D is breaker dutycycle, KpiIt is current control proportionality coefficient, dt is time diffusion variable, KiiFor current control is accumulated
Divide coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611095011.8A CN106786416A (en) | 2016-12-02 | 2016-12-02 | A kind of two-way variable-pressure HVDC tripper and short trouble cutting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611095011.8A CN106786416A (en) | 2016-12-02 | 2016-12-02 | A kind of two-way variable-pressure HVDC tripper and short trouble cutting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106786416A true CN106786416A (en) | 2017-05-31 |
Family
ID=58883866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611095011.8A Pending CN106786416A (en) | 2016-12-02 | 2016-12-02 | A kind of two-way variable-pressure HVDC tripper and short trouble cutting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106786416A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111711173A (en) * | 2020-06-28 | 2020-09-25 | 武汉大学 | Photovoltaic multiport direct current protection system for short circuit fault of high-low voltage port |
| CN113315102A (en) * | 2021-05-28 | 2021-08-27 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Direct current circuit breaker of multi-terminal direct current transmission system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201188553Y (en) * | 2008-04-28 | 2009-01-28 | 华北电力大学 | Super capacitance energy-storing control device |
| CN102055354A (en) * | 2009-10-30 | 2011-05-11 | 西门子公司 | Alternating current-direct current (AC-DC) converter and frequency converter |
| CN103490635A (en) * | 2013-10-09 | 2014-01-01 | 南京集能易新能源技术有限公司 | Improved H bridge buck-boost DC converter and control method thereof |
| CN103516201A (en) * | 2013-04-15 | 2014-01-15 | 南京航空航天大学 | Low-ripple H-bridge buck-boost direct current converter |
| CN103928918A (en) * | 2014-05-05 | 2014-07-16 | 西南交通大学 | Removing system and method for transformation type high-voltage direct-current breaker short-circuit fault |
| CN104470014A (en) * | 2013-09-18 | 2015-03-25 | 美的集团股份有限公司 | Buck-boost circuit for electromagnetic heating device and control method thereof |
-
2016
- 2016-12-02 CN CN201611095011.8A patent/CN106786416A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201188553Y (en) * | 2008-04-28 | 2009-01-28 | 华北电力大学 | Super capacitance energy-storing control device |
| CN102055354A (en) * | 2009-10-30 | 2011-05-11 | 西门子公司 | Alternating current-direct current (AC-DC) converter and frequency converter |
| CN103516201A (en) * | 2013-04-15 | 2014-01-15 | 南京航空航天大学 | Low-ripple H-bridge buck-boost direct current converter |
| CN104470014A (en) * | 2013-09-18 | 2015-03-25 | 美的集团股份有限公司 | Buck-boost circuit for electromagnetic heating device and control method thereof |
| CN103490635A (en) * | 2013-10-09 | 2014-01-01 | 南京集能易新能源技术有限公司 | Improved H bridge buck-boost DC converter and control method thereof |
| CN103928918A (en) * | 2014-05-05 | 2014-07-16 | 西南交通大学 | Removing system and method for transformation type high-voltage direct-current breaker short-circuit fault |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111711173A (en) * | 2020-06-28 | 2020-09-25 | 武汉大学 | Photovoltaic multiport direct current protection system for short circuit fault of high-low voltage port |
| CN113315102A (en) * | 2021-05-28 | 2021-08-27 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Direct current circuit breaker of multi-terminal direct current transmission system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104300516B (en) | Unidirectional transformation-type high-voltage DC circuit breaker based on Buck convertor | |
| CN103928918B (en) | A kind of excision system and method for variable-pressure high voltage DC breaker short trouble | |
| CN104300517B (en) | A kind of unidirectional variable-pressure high voltage DC breaker based on improved One Buck-Boost converter body | |
| CN110504672A (en) | The design protection method of ship direct current synthesis electrical method system and system | |
| CN112886550B (en) | MMC flexible direct-current power grid self-adaptive fault clearing method based on source network coordination | |
| CN105048488A (en) | Flexible DC network DC short-circuit fault ride through method | |
| CN109617026B (en) | Ultrahigh-speed protection method for earth fault of direct-current power grid converter station | |
| CN102567783A (en) | Expert fault analytical and diagnostic method of parallel mixed type power quality regulator | |
| CN102222889A (en) | Controller for circuit asymmetrical earth fault current and control method thereof | |
| CN103354354B (en) | Be applicable to impedance protecting method and the device of micro-capacitance sensor | |
| CN106026048A (en) | DC grid fault handling strategy based on in-situ detection and in -situ protection | |
| CN102148501B (en) | Disturbance generation device for wind power station | |
| CN109787206A (en) | A kind of capacitance-resistance type current-limiting type direct-current breaker topology suitable for multiterminal element and DC grid | |
| CN113078619A (en) | Rapid protection method for flexible direct-current power grid | |
| CN110048389A (en) | The hybrid DC Line Fault current limiter topology of current commutation H bridge type | |
| CN104767169A (en) | High-voltage direct-current breaker based on Buck-Boost converter topology and fault removal method thereof | |
| Mitra et al. | Comparative analysis of hybrid DC breaker and assembly HVDC breaker | |
| CN111987702A (en) | Flexible direct-current distribution line protection device and method based on direct-current circuit breaker | |
| CN104901265B (en) | The method of high voltage DC breaker and its excision failure based on Cuk converter topologies | |
| CN104767186B (en) | High voltage DC breaker based on Zeta converter topologies | |
| CN106786416A (en) | A kind of two-way variable-pressure HVDC tripper and short trouble cutting method | |
| CN104767187A (en) | High-voltage direct-current breaker based on Sepic converter topology and fault removal method thereof | |
| CN201946970U (en) | High-voltage transformer neutral point direct current isolating device | |
| CN202949231U (en) | Intelligent zero-crossing switching silicon controlled combination switch | |
| CN110649565B (en) | Protection method of regenerative braking energy feedback system of high-speed rail |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |