CN107565520B - A kind of dc circuit breaker principal and subordinate cooperative control method and control system - Google Patents
A kind of dc circuit breaker principal and subordinate cooperative control method and control system Download PDFInfo
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Abstract
The present invention provides a kind of dc circuit breaker principal and subordinate cooperative control method and control system, which comprises when breaking down and issuing breaking signal from control signal, turns off mechanical branch switch, and record time of failure；When distance fault time of origin be less than time threshold, detect that electric current is zero, then disjunction mechanical switch；When distance fault time of origin is not less than time threshold, detects that mechanical switch is cut-off when reaching pressure resistance, receive master signal, and judged whether to turn off dc circuit breaker main branch switch according to the master signal received；The master signal is system detection signal；It is described from control signal be dc circuit breaker internal dc voltage value variable signal.Technical solution provided by the invention realizes that failure response speed is fast, accuracy of judgement using, from the rapidity of control, the two combines the judgement system failure inside the accuracy and dc circuit breaker of system detection signal, can effectively prevent the malfunction of dc circuit breaker.
Description
Technical field
The present invention relates to the control fields of dc circuit breaker, and in particular to a kind of dc circuit breaker principal and subordinate cooperative control method
And control system.
Background technique
Dc circuit breaker is one of the key equipment in DC transmission system, can be divided into three types at present: mechanical
Dc circuit breaker, all solid state dc circuit breaker and hybrid dc circuit breaker.Wherein, hybrid dc circuit breaker opens machinery
The advantages of combining with solid state electrical electronic device, combine the above two is closed, there are good Research Prospects.However, direct current
Side fault progression is rapid, direct fault current be difficult to turn off rapidly be still the main problem that faces of hybrid dc circuit breaker it
One and current research emphasis.
A kind of cascade full-bridge direct current open circuit based on full-bridge modules series connection and Fast mechanical switch is proposed in the prior art
Device can complete disjunction within several milliseconds, and realize the soft of short circuit current and cut-off, while reduce pressure difficulty.Document
" cascade bridge-type dc circuit breaker control strategy and its dynamic simulation test " pre- transition strategy of electric current, utilizes quick fault testing
Mechanical switch is shifted to an earlier date disjunction by method, to promote the breaking speed of dc circuit breaker.
Currently, dc circuit breaker primary recipient is cut-off from the detection signal completion of system, therefore failure response time master
Will be including the time used in system failure detection, signal transmitting and mechanical switch disjunction, the completion cutoff action time is long, Bu Nengji
When complete cut-off.
Summary of the invention
It is opened to solve the dc circuit breaker primary recipient in the presence of the prior art from the detection signal completion of system
Disconnected, caused failure response time is long, and the problem of cannot cut-offfing in time, the present invention provides a kind of dc circuit breaker principal and subordinate collaboration control
Method and control system processed.
Present invention provide the technical scheme that a kind of dc circuit breaker principal and subordinate cooperative control method, which comprises
When breaking down and issuing breaking signal from control signal, mechanical branch switch is turned off, and record failure
Time；
When distance fault time of origin be less than time threshold, detect that electric current is zero, then disjunction mechanical switch；
When distance fault time of origin is not less than time threshold, detects that mechanical switch is cut-off when reaching pressure resistance, receive master
Signal is controlled, and is judged whether to turn off dc circuit breaker main branch switch according to the master signal received；
The master signal is system detection signal；
It is described to be determined from control signal by dc circuit breaker internal dc voltage value.
Preferably, the master signal that the basis receives judges whether that turning off dc circuit breaker main branch switchs,
If including: the cut-off signals that dc circuit breaker receives the master signal, main branch is turned off.
Preferably, described to determine to include: when in dc circuit breaker by dc circuit breaker internal dc voltage value from control signal
It is in low potential from control signal described in when portion's DC voltage value is lower than voltage threshold, it is otherwise described to be in high potential from control signal；
It is breaking signal when being in low potential from control signal.
Preferably, the method also includes verification method, the verification method includes: the access control dress on emulation platform
It sets, or accesses control logic on emulation platform, judge that dc circuit breaker is for verifying dc circuit breaker principal and subordinate's coordinated control
It is no to break down and to the response speed of failure.
Preferably, the access control apparatus on emulation platform, comprising:
Major loop is built according to the relationship of main branch and transfer branch on mathematical simulation platform；
Current signal, the mechanical switch detected in acquisition major loop cut-offs pressure-resistant signal, and transmits a signal to control and protect
Protecting system；
The current signal, the mechanical switch that Control protection system receives acquisition cut-off pressure-resistant signal, are assisted by principal and subordinate
Regulation system judgement, the instruction of each switch state and variable connector signal by dc circuit breaker feed back to real-timedigital simulation model
In each switch.
It is preferably, described that control logic is accessed on emulation platform, comprising:
The secondary of major loop and control logic is built according to the relationship of main branch and transfer branch on mathematical simulation platform
Major loop.
Preferably, the control logic includes:
Time of failure is recorded, while whether the judgement voltage from control signal is lower than voltage threshold, if then standing
Mechanical branch is turned off, performs the next step, otherwise operates normally, continue to execute this step；
When distance fault time of origin is less than time threshold, detect that electric current is zero, then disjunction mechanical switch；
When distance fault time of origin is more than or equal to time threshold, detects that mechanical switch is cut-off when reaching pressure resistance, connect
Master signal is received, judges whether to turn off dc circuit breaker main branch switch；
If dc circuit breaker receives the cut-off signals of master signal, main branch is turned off.
A kind of dc circuit breaker principal and subordinate cooperative control system, the system comprises detection module, judgment module and control moulds
Block；
The detection module, the pressure voltage cut-off for detecting current value and mechanical switch；
The judgment module, for judging the size of distance fault time of origin and time threshold；
The control module is used to switch the dc circuit breaker main branch according to master signal and from control signal, machine
Tool switch and mechanical branch switch are controlled；
The master signal is system detection signal；
It is described to be determined from control signal by dc circuit breaker internal dc voltage value.
Preferably, the control module include: master control submodule and from control submodule；
The master control submodule is used for when distance fault time of origin is not less than time threshold, when mechanical switch is cut-off
When reaching resistance to pressure request, master signal is received, and is judged whether to turn off the main branch of dc circuit breaker according to the master signal received
Way switch；
It is described from control submodule, for judge it is described whether be in low potential from control signal, if in low potential immediately
Turn off mechanical branch, and when distance fault time of origin is less than time threshold, judge after turning off mechanical branch, electric current whether be
Zero, if zero disjunction mechanical switch.
It preferably, further include authentication module；
The authentication module, for verifying judgement and response speed of the dc circuit breaker principal and subordinate coordinated control to failure.
Preferably, the authentication module includes: control device submodule and control logic submodule；
The control device submodule, it is disconnected for verifying direct current by way of the access control apparatus mould on emulation platform
Judgement and response speed of the road device principal and subordinate coordinated control to failure；
The control logic submodule, for verifying direct current interruption by way of accessing control logic on emulation platform
Judgement and response speed of the device principal and subordinate coordinated control to failure.
Preferably, the control device submodule includes: building subelement, acquisition subelement and control subelement；
The building subelement is led back for being built on mathematical simulation platform according to the relationship of main branch and transfer branch
Road；
The acquisition subelement, for acquiring the current signal detected in major loop, mechanical switch cut-off pressure-resistant signal, and
Transmit a signal to Control protection system；
The control subelement, the current signal, the mechanical switch for receiving acquisition for Control protection system are cut-off
Pressure-resistant signal judges that the instruction of each switch state and variable connector signal by dc circuit breaker are anti-by principal and subordinate's coordinated control
The each switch fed in real-timedigital simulation model.
Preferably, the control logic submodule includes: secondary circuit building submodule；
The secondary circuit constructs submodule, on mathematical simulation platform according to the relationship of main branch and transfer branch
Build the secondary major loop of major loop and control logic.
Compared with prior art, the invention has the benefit that
Technical solution provided by the invention saves system detection and letter from the rapidity of control using circuit breaker internal
Number the time used is transmitted, and prevents the malfunction of dc circuit breaker using the accuracy of DC protection system main control.
Technical solution provided by the invention carries out Collaborative Control to dc circuit breaker according to master signal and from control signal, real
It is fast failure response speed is showed, accuracy of judgement enhances the reliability of dc circuit breaker work, effectively prevent the expansion of the system failure
Greatly；
Technical solution provided by the invention uses quick low voltage test method from control, i.e., closes rapidly when DC voltage is too low
Off line tool branch, reduces fault detection and signal transmits the time used；
Technical solution provided by the invention be not necessarily to by dc circuit breaker it is equivalent, can really reflect each switch of dc circuit breaker
State, also can be used as the engineering verifying means of dc circuit breaker control strategy.
Detailed description of the invention
Fig. 1 is dc circuit breaker principal and subordinate's cooperative control method flow chart of the invention；
Fig. 2 is the control logic schematic diagram verifying control effect of the invention and building in numeral simulation analysis；
Fig. 3 is the control system schematic diagram verifying control effect of the invention and constructing in numeral simulation analysis；
Fig. 4 is dc current waveform schematic diagram of the invention；
Fig. 5 is fault detection signal state waveform diagram of the invention；
Wherein, 1- main branch, 2- shift branch, 3- solid-state switch, 4- arrester.
Specific embodiment
For a better understanding of the present invention, the contents of the present invention are done further with example with reference to the accompanying drawings of the specification
Explanation.
The invention proposes a kind of dc circuit breaker principal and subordinate cooperative control method and the schemes of control system, for controlling not
Fault current is cut-off with the dc circuit breaker under operating condition.As shown in Figure 1:
When breaking down and issuing breaking signal from control signal, mechanical branch switch is turned off, and record failure
Time；
When distance fault time of origin be less than time threshold, detect that electric current is zero, then disjunction mechanical switch；
When distance fault time of origin is not less than time threshold, detects that mechanical switch is cut-off when reaching pressure resistance, receive master
Signal is controlled, and is judged whether to turn off dc circuit breaker main branch switch according to the master signal received；
Master signal is system detection signal；
It is the variable signal of dc circuit breaker internal dc voltage value from control signal.
The control method is based on the control of system detection signal, and the control of detection signal is from the party inside dc circuit breaker
Method has following timing:
It is received first from control signal, judges whether DC voltage is too low, be by the quick low electricity from control from control signal
The signal for pressing detection method to obtain；
If DC voltage is too low, mechanical branch is immediately turned off；
After mechanical switch cut-offs and reaches resistance to pressure request, master signal is received, judges whether to turn off dc circuit breaker；
If dc circuit breaker receives main control cut-off signals, main branch is immediately turned off.
The current signal detected in major loop, mechanical switch are cut-off into pressure-resistant signal by I/O interface or optical fiber, are transferred to
Dc circuit breaker Control protection system device, control protective unit are judged by principal and subordinate's coordinated control, by each of dc circuit breaker
Variable connector signal is fed back to each switch in real-timedigital simulation model, realization device control by a switch state instruction
The compliance test result of strategy.
By taking the simplification system of a typical hybrid formula dc circuit breaker as an example, direct-current breaker topology is as shown in Fig. 2, main branch
1 is connected in parallel with transfer branch 2, shifts concatenated n solid-state switch 3 on branch 2, keeps away for one in parallel on each solid-state switch 3
Thunder device 4, a mechanical switch is connected m solid-state switch 3 in main branch.
As shown in figure 3, setting system permanent short trouble, dc circuit breaker breaking course emulation electricity occur for system model
Waveform is flowed as shown in figure 4, fault detection signal state wave shape is as shown in figure 5, when systems are functioning properly, and detection signal is 1, is
After system breaks down, detection signal becomes 0, and specific control process is as follows:
Step 1: after short trouble occurs, DC voltage is reduced rapidly, and when voltage value is too low, issues disjunction letter from control
Number, dc circuit breaker turns off machinery branch IGBT switch, and the disjunction mechanical switch after electric current becomes zero；
Step 2: main control detection signal about sends dc circuit breaker to after 2ms occurs for failure, and mechanical switch reaches at this time
To resistance to pressure request, dc circuit breaker main branch IGBT is all off, and electric current is transferred to energy absorption branch, and electric current is gradually reduced to
Zero.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The above is only the embodiment of the present invention, are not intended to restrict the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent substitution, improvement and etc. done, be all contained in apply pending scope of the presently claimed invention it
It is interior.
Claims (11)
1. a kind of dc circuit breaker principal and subordinate cooperative control method, which is characterized in that the described method includes:
When breaking down and issuing breaking signal from control signal, mechanical branch switch is turned off, and record time of failure；
When distance fault time of origin be less than time threshold, detect that electric current is zero, then disjunction mechanical switch；
When distance fault time of origin is not less than time threshold, detects that mechanical switch is cut-off when reaching pressure resistance, receive master control letter
Number, and judged whether to turn off dc circuit breaker main branch switch according to the master signal received；
The master signal is system detection signal；
It is described to be determined from control signal by dc circuit breaker internal dc voltage value；
The method also includes verification method, the verification method includes: the access control apparatus on emulation platform, or is being emulated
Control logic is accessed on platform, for verify dc circuit breaker principal and subordinate's coordinated control judge dc circuit breaker whether break down and
To the response speed of failure.
2. dc circuit breaker principal and subordinate cooperative control method as described in claim 1, which is characterized in that the basis received
The master signal judges whether to turn off dc circuit breaker main branch switch, comprising: if dc circuit breaker receives the master control
The cut-off signals of signal, then turn off main branch.
3. dc circuit breaker principal and subordinate cooperative control method as described in claim 1, which is characterized in that it is described from control signal by straight
Stream determinations of circuit breaker internal DC voltage value include: when dc circuit breaker internal dc voltage value be lower than voltage threshold when described in from
Control signal is in low potential, otherwise described to be in high potential from control signal；
It is breaking signal when being in low potential from control signal.
4. dc circuit breaker principal and subordinate cooperative control method as described in claim 1, which is characterized in that described on emulation platform
Access control apparatus, comprising:
Major loop is built according to the relationship of main branch and transfer branch on mathematical simulation platform；
Current signal, the mechanical switch detected in acquisition major loop cut-offs pressure-resistant signal, and transmits a signal to control protection system
System；
The current signal, the mechanical switch that Control protection system receives acquisition cut-off pressure-resistant signal, coordinate to control by principal and subordinate
System judgement, the instruction of each switch state and variable connector signal by dc circuit breaker are fed back in real-timedigital simulation model
Each switch.
5. dc circuit breaker principal and subordinate cooperative control method as described in claim 1, which is characterized in that described on emulation platform
Access control logic, comprising:
It is returned on mathematical simulation platform according to the secondary master that the relationship of main branch and transfer branch builds major loop and control logic
Road.
6. dc circuit breaker principal and subordinate cooperative control method as claimed in claim 5, which is characterized in that the control logic packet
It includes:
Time of failure is recorded, while whether the judgement voltage from control signal is lower than voltage threshold, if then closing immediately
Off line tool branch, performs the next step, otherwise operates normally, continue to execute this step；
When distance fault time of origin is less than time threshold, detect that electric current is zero, then disjunction mechanical switch；
When distance fault time of origin is more than or equal to time threshold, detects that mechanical switch is cut-off when reaching pressure resistance, receive master
Signal is controlled, judges whether to turn off dc circuit breaker main branch switch；
If dc circuit breaker receives the cut-off signals of master signal, main branch is turned off.
7. a kind of dc circuit breaker principal and subordinate cooperative control system, which is characterized in that the system comprises detection modules, judgment module
And control module；
The detection module, the pressure voltage cut-off for detecting current value and mechanical switch；
The judgment module, for judging the size of distance fault time of origin and time threshold；
The control module, for according to master signal and from control signal switchs the dc circuit breaker main branch, machinery is opened
It closes and mechanical branch switch is controlled；
The master signal is system detection signal；
It is described to be determined from control signal by dc circuit breaker internal dc voltage value；
It further include authentication module；
The authentication module, for verifying judgement and response speed of the dc circuit breaker principal and subordinate coordinated control to failure.
8. dc circuit breaker principal and subordinate cooperative control system as claimed in claim 7, which is characterized in that the control module packet
Include: master control submodule and from control submodule；
The master control submodule, for reaching when mechanical switch is cut-off when distance fault time of origin is not less than time threshold
When resistance to pressure request, master signal is received, and judge whether that turning off dc circuit breaker main branch opens according to the master signal received
It closes；
It is described from control submodule, for judge it is described whether be in low potential from control signal, immediately turned off if in low potential
Mechanical branch, and when distance fault time of origin is less than time threshold, judge after turning off mechanical branch, whether electric current is zero,
If zero disjunction mechanical switch.
9. dc circuit breaker principal and subordinate cooperative control system as claimed in claim 7, which is characterized in that the authentication module packet
It includes: control device submodule and control logic submodule；
The control device submodule, for verifying dc circuit breaker master by way of the access control apparatus on emulation platform
Judgement and response speed from coordinated control to failure；
The control logic submodule, for verifying dc circuit breaker master by way of accessing control logic on emulation platform
Judgement and response speed from coordinated control to failure.
10. dc circuit breaker principal and subordinate cooperative control system as claimed in claim 9, which is characterized in that control device
Module includes: building subelement, acquisition subelement and control subelement；
The building subelement, for building major loop according to the relationship of main branch and transfer branch on mathematical simulation platform；
The acquisition subelement, for acquiring the current signal detected in major loop, mechanical switch cut-off pressure-resistant signal, and will letter
Number it is transferred to Control protection system；
The control subelement, the current signal, the mechanical switch for receiving acquisition for Control protection system cut-off pressure resistance
Signal judges that the instruction of each switch state and variable connector signal by dc circuit breaker are fed back to by principal and subordinate's coordinated control
Each switch in real-timedigital simulation model.
11. dc circuit breaker principal and subordinate cooperative control system as claimed in claim 9, which is characterized in that control logic
Module includes: secondary circuit building submodule；
The secondary circuit constructs submodule, for being built on mathematical simulation platform according to the relationship of main branch and transfer branch
The secondary major loop of major loop and control logic.
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Families Citing this family (3)
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| CN109494873A (en) * | 2018-11-08 | 2019-03-19 | 全球能源互联网研究院有限公司 | A kind of control guard method of AC-DC hybrid power grid, apparatus and system |
| CN112130063B (en) * | 2020-08-28 | 2024-04-12 | 许继集团有限公司 | Detection and protection method for mechanical switch theft jump of hybrid high-voltage direct-current breaker |
| CN113421802B (en) * | 2021-06-07 | 2023-06-13 | 武汉特试特科技股份有限公司 | Low-voltage intelligent circuit breaker protection method and system |
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