CN109038595A - Low-capacity/low-impedance flexible switching system and control method thereof - Google Patents
Low-capacity/low-impedance flexible switching system and control method thereof Download PDFInfo
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- CN109038595A CN109038595A CN201810695103.2A CN201810695103A CN109038595A CN 109038595 A CN109038595 A CN 109038595A CN 201810695103 A CN201810695103 A CN 201810695103A CN 109038595 A CN109038595 A CN 109038595A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000012544 monitoring process Methods 0.000 claims abstract description 21
- 238000005259 measurement Methods 0.000 claims abstract description 16
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- 238000012423 maintenance Methods 0.000 claims abstract description 5
- 230000001681 protective effect Effects 0.000 claims description 32
- 230000015556 catabolic process Effects 0.000 claims description 13
- 230000002452 interceptive effect Effects 0.000 claims description 12
- 230000001052 transient effect Effects 0.000 claims description 12
- 229910044991 metal oxide Inorganic materials 0.000 claims description 11
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- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 230000006870 function Effects 0.000 description 8
- 238000004590 computer program Methods 0.000 description 7
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- 238000012545 processing Methods 0.000 description 5
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- 238000009413 insulation Methods 0.000 description 2
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- CUZMQPZYCDIHQL-VCTVXEGHSA-L calcium;(2s)-1-[(2s)-3-[(2r)-2-(cyclohexanecarbonylamino)propanoyl]sulfanyl-2-methylpropanoyl]pyrrolidine-2-carboxylate Chemical group [Ca+2].N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1.N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1 CUZMQPZYCDIHQL-VCTVXEGHSA-L 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Keying Circuit Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides a low-capacitance/low-impedance flexible switching system and a control method thereof, wherein the flexible switching system comprises a voltage measurement branch, an overvoltage stabilizing branch, an intelligent monitoring system and a flexible switching switch branch, and the control method provides a corresponding control process from three aspects of maintenance of the flexible switching system, failure of the low-capacitance/low-impedance and switching of the low-capacitance/low-impedance, effectively inhibits voltage or current impact caused in switching operation, does not cause harm to the whole equipment where the low-capacitance/low-impedance and even the switching switch are located, and avoids the condition that the whole equipment is scrapped. The intelligent monitoring system is configured in a modularized manner, modules are mutually isolated, the framework is clear, the expandability and the applicability are good, and the intelligent monitoring system can be universally used for intelligent monitoring and analysis of other equipment in the transformer substation; and the flexible switching of low capacity/low impedance is realized, the flexibility and the safety of equipment operation are ensured, and the safety and the flexibility of the equipment operation are improved.
Description
Technical field
The present invention relates to high voltages and Insulation Coordination technical field, and in particular to a kind of low appearance/low anti-flexible fling-cut system
And its control method.
Background technique
Low-pressure side shunt capacitor (hereinafter referred to as low appearance) and low-pressure side shunt reactor (hereinafter referred to as low anti-) are super
The important component of high voltage substation, the major function of the two are to control reactive power flow, stable power system by switching operation
The working voltage of system is of great significance to the safety of operation of power networks, stability and economy.Low appearance, low anti-switching behaviour
Make to realize by the breaking-closing operating of fling-cut switch connected in series.In engineering practice, when conventional fling-cut switch three-phase acts
Between there is dispersibility, the monophasic action time has randomness, often occurs during fling-cut switch separating brake shutting off existing with repeated breakdown
As, and lacking the overvoltage protection measure during low appearance/low anti-switching in the prior art, switching operation can cause voltage or electricity
Stream impact, to it is low hold/low anti-or even fling-cut switch where whole equipment cause damages and even result in whole equipment and scrap, mainly
Be embodied in the following aspects: the inrush phenomenon generated when 1) putting into low appearance can cause the rapid deterioration of contact of breaker, influence
Breaker service life；2) when cutting out low appearance such as there is multiple repeated breakdown in fling-cut switch, it is possible to create the grade of amplitude rose electricity
Pressure causes the adverse consequences such as the increase of arrester energy consumption, apparatus insulated damage；3) multiple repeated breakdown such as occurs when cutting out low anti-, it can
Amplitude can be formed, the grade of high steepness rises overvoltage, since substation generally only installs arrester, and reactor side in bus bar side
Lack safeguard measure, reactor turn-to-turn insulation may be destroyed.
Summary of the invention
It is above-mentioned in the prior art due to a lack of the overvoltage protection measure during low appearance/low anti-switching to equipment in order to overcome
The deficiency to cause damages, the present invention provide the low appearance of one kind/low anti-flexible fling-cut system and its control method, flexible fling-cut system packet
Include voltage measurement branch, overvoltage stabilizes branch, intelligent monitor system and flexible fling-cut switch branch, control method are thrown from flexibility
Cutting system maintenance, it is low hold/it is low it is anti-break down and need to it is low hold/low anti-progress switching three in terms of give specific control
Process, flexible fling-cut system structure is simple, effectively inhibits the voltage or rush of current that cause in switching operation, will not to it is low hold/it is low
Whole equipment where anti-or even fling-cut switch causes damages, and more avoids the case where whole equipment is scrapped.
In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme that:
On the one hand, the present invention provides a kind of low appearance/low anti-flexible fling-cut system, and the low appearance is low-pressure side shunt capacitance
Device, it is described it is low resist for low-pressure side shunt reactor, the system comprises:
Voltage measurement branch, for measuring steady state voltage and transient voltage in low appearance/low anti-operational process；
Overvoltage stabilizes branch, for inhibit it is low hold/low anti-switching during steady-state overvoltage and transient overvoltage；
Intelligent monitor system, for monitor it is low hold/low anti-operating status, and according to the control instruction of substation to flexibility
Fling-cut switch branch issues divide-shut brake instruction；
Flexible fling-cut switch branch, the divide-shut brake instruction for being issued according to intelligent monitor system are realized low perhaps low anti-
Switching.
The voltage measurement branch includes concatenated high-voltage arm divider resistance R1 and low-voltage arm divider resistance R2；
One end of the high-voltage arm divider resistance R1 connects common point D, and other end low-voltage wiring terminal connects voltage and surveys
Measure terminal C；Described one end low-voltage arm divider resistance R2 connects voltage measurement terminal C, other end ground connection, the common point D with
Outlet terminal B connection, the outlet terminal B connect low appearance/low anti-high-voltage connection terminal.
It includes the first current transformer TA1 and metal oxide pressure-limiting device that the overvoltage, which stabilizes branch,；
The high-voltage connection terminal of the first current transformer TA1 meets common point D, and low-voltage wiring terminal and metal aoxidize
The high-voltage connection terminal of object voltage limiter connects, the low-voltage wiring terminal ground connection of the metal oxide pressure-limiting device.
The flexibility fling-cut switch branch includes disconnecting switch S, Failsafe switching K2, controlled switching switch K1 and second
Current transformer TA2；
The high-voltage connection terminal of the disconnecting switch S connects input terminal A, and the protection of low-voltage wiring terminal connecting fault is opened
Close the high-voltage connection terminal of K2, the high-voltage connection of the low-voltage wiring terminal and controlled switching switch K1 of the Failsafe switching K2
Terminal connection, the low-voltage wiring terminal of the controlled switching switch K1 and the high voltage nodes terminal of the second current transformer TA2 connect
Connect, the low-voltage wiring terminal of the second current transformer TA2 is connect with common point D, the input terminal A and transformer it is low
Press side bus connection.
The intelligent monitor system includes state measuring block, monitoring and interactive module, control protective module and display
Module；
The state measuring block receives the electric current and that the overvoltage that the first current transformer TA1 is sent stabilizes branch
Two current transformer TA2 send flexible fling-cut switch branch electric current, while the low-pressure side bus voltage of receiving transformer with
And steady state voltage and transient voltage in low appearance/low anti-operational process, received electric current and voltage are converted into digital signal, and
Digital signal is sent to monitoring and interactive module and control protective module；The monitoring and interactive module are to state measurement mould
Disconnecting switch S, Failsafe switching K2 and the controlled switching in digital signal and flexibility fling-cut switch branch that block is sent are opened
The location status for closing K1 is monitored and stores, while monitored results are sent to display module and substation；The control is protected
Digital signal, the control command from substation and the flexibility fling-cut switch branch that shield module is sent according to state measuring block
The location status of disconnecting switch S, Failsafe switching K2 and controlled switching switch K1 in road, to disconnecting switch S, error protection
Switch K2 and controlled switching switch K1 issues switching order；The display module is for showing monitored results.
On the other hand, the present invention provides a kind of control method of low appearance/low anti-flexible fling-cut system, comprising:
When it is described it is low hold/low anti-flexible fling-cut system maintenance when, control protective module in the intelligent monitor system to
Disconnecting switch S and controlled switching switch K1 in flexible fling-cut switch branch send separating brake order, make controlled switching switch K1 points
Lock；
When it is described it is low hold/it is low it is anti-break down when, control protective module in the intelligent monitor system is to flexible switching
Failsafe switching K2 in switching branches sends separating brake order, makes Failsafe switching K2 separating brake；
When receiving the control instruction of substation, low appearance investment flexible control is carried out, low appearance cuts out flexible control, low anti-
Put into flexible control or low anti-cut flexible control out.
In the low appearance investment flexible control, the control protective module receives the low appearance instruction of investment that substation sends
Afterwards, reclosing command is sent to the two-phase switch contact of controlled switching switch K1, is closed two-phase switch contact, and in 1/4 power frequency
Reclosing command is sent to the third phase switch contact of controlled switching switch K1 after period, is closed third phase switch contact.
The low appearance is cut out in flexible control, and the control protective module receives the low appearance that cuts out that substation sends and instructs
Afterwards, separating brake order is sent to each phase switch contact of controlled switching switch K1 before low each phase current zero crossing of appearance, opens each phase
Close contact separating brake；
Separating brake order is sent to each phase switch contact of controlled switching switch K1 and low each phase current of appearance reaches zero crossing
Time interval are as follows: the fracture between each phase switch contact of the controlled switching switch K1 reaches the fracture clearance gap of no repeated breakdown
From the required contact travel time.
In the low anti-investment flexible control, the control protective module receives the low anti-instruction of investment that substation sends
Afterwards, it sends and closes to each phase switch contact of controlled switching switch K1 when each phase voltage of the low-pressure side bus of transformer reaches peak value
Lock instruction, makes each phase switch contact close a floodgate.
In the low anti-cut flexible control out, what the control protective module reception substation sent cuts out low anti-instruction
Afterwards, it is low resist send separating brake order to each phase switch contact of controlled switching switch K1 before each phase current zero crossing, open each phase
Close contact separating brake；
Send separating brake order to each phase switch contact of controlled switching switch K1 resists each phase current to reach zero crossing with low
Time interval are as follows: the fracture between each phase switch contact of the controlled switching switch K1 reaches the clearance distance institute of no repeated breakdown
The contact travel time needed.
Compared with the immediate prior art, technical solution provided by the invention is had the advantages that
It is provided by the invention it is low hold/low anti-flexible fling-cut system includes that voltage measurement branch, overvoltage stabilize branch, intelligence
Monitoring system and flexible fling-cut switch branch, flexible fling-cut system structure is simple, effectively inhibit the voltage caused in switching operation or
Rush of current will not cause damages to the whole equipment where low appearance/low anti-or even fling-cut switch, more avoid whole equipment report
Useless situation；
It is provided by the invention it is low hold/control method of low anti-flexible fling-cut system overhaul from flexible fling-cut system, low appearance/low
It is anti-break down and need to it is low hold/low anti-progresss switching three in terms of give specific control process, need to low appearance/low
Be divided into low appearance investment flexible control in anti-carry out switching, low appearance cuts out flexible control, low anti-investment flexible control or it is low it is anti-cut out
Four kinds of flexible control controls, control process is simple, will not cause to endanger to the whole equipment where low appearance/low anti-or even fling-cut switch
Evil, more avoids the case where whole equipment is scrapped；
The present invention completes low appearance/low anti-switching operation using controlled switching switch, when can accurately control divide-shut brake
Between, the dispersibility of reduction movement supports split-phase operation, significantly reduces the impact of overcurrent and overvoltage, reduce switch and set
The probability of the raw repeated breakdown of preparation plays the role of being effectively protected to low appearance/low anti-and switchgear；
Flexible fling-cut switch branch in the present invention is using controlled switching switch, Failsafe switching and disconnecting switch series connection
Structure, controlled switching switch, Failsafe switching and disconnecting switch undertakes equipment switching respectively, fault current is cut-off, back brake is grasped
Make function, take full advantage of the functional characteristic of different switchgears, improves the utilization efficiency of equipment, extend service life；
The present invention use metal oxide pressure-limiting device for it is low hold/the low anti-overvoltage that is configured with stabilizes branch, fast response time,
Pressure limiting superior performance provides reliable overvoltage back-up protection for low appearance/low anti-and switchgear；
The present invention using metal oxide pressure-limiting device by controlled switching switch restore voltage maintain reduced levels without
It increases step by step, not only directly protects relevant device, but also reduce the probability of controlled switching switch repeated breakdown；
The present invention configures intelligent monitor system using modularized design structure, and each module is mutually isolated, and framework is clear, has
Good scalability and applicability, can be universally used in the intelligent monitoring and analysis of other equipment in substation；
Technical solution provided by the invention realize it is low hold/low anti-flexible switching, guarantee equipment operation flexibility and
Safety, and improve the safety and flexibility of equipment operation.
Detailed description of the invention
Fig. 1 is low appearance in the embodiment of the present invention 1/low anti-flexible fling-cut system structure chart；
Fig. 2 is intelligent monitor system structure chart in the embodiment of the present invention 1.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
Embodiment 1
The embodiment of the present invention 1 provides a kind of low appearance/low anti-flexible fling-cut system, and low appearance therein is low-pressure side shunt capacitance
Device, it is therein it is low resist for low-pressure side shunt reactor, the low appearance that the embodiment of the present invention 1 provides/low anti-flexible fling-cut system structure
Figure is as shown in Figure 1, in Fig. 1, and K1 indicates that controlled switching switch, K2 indicate that Failsafe switching, S indicate disconnecting switch, and TA2 is indicated
Second current transformer, TA1 indicate that the first current transformer, MOV indicate that metal oxide pressure-limiting device, A indicate input terminal, even
It connects on substation's 35kV low-pressure side bus；B indicates outlet terminal, is connected with low appearance/low anti-high-voltage connection terminal.C is indicated
Voltage measurement terminal, R1, R2 respectively indicate high-voltage arm divider resistance and low-voltage arm divider resistance, and TV indicates substation bus bar voltage
Mutual inductor.Position_0, Position_1, Position_2 respectively indicate the opening and closing state of S, K1, K2, Ct_0, Ct_1
The electric current and overvoltage that respectively indicate flexible fling-cut switch branch stabilize the electric current of branch, and Pt_0, Pt_1 respectively indicate transformer
Low-pressure side bus voltage and it is low hold/low anti-steady state voltage and transient voltage, Contro_0, Contro_1 and Contro_2 points
The switching order that S, K1, K2 Biao Shi do not issued.
The low appearance that the embodiment of the present invention 1 provides/low anti-flexible fling-cut system specifically includes voltage measurement branch, overvoltage is put down
Press down branch, intelligent monitor system and flexible fling-cut switch branch, this several part be described in detail separately below:
Voltage measurement branch therein, for measuring steady state voltage and transient voltage in low appearance/low anti-operational process, i.e.,
Voltage measurement branch is used to measure the steady state voltage and transient voltage in low appearance operational process, or for measuring low anti-ran
Steady state voltage and transient voltage in journey, to reduce the impact of the voltage and current in operating process；
Overvoltage therein stabilizes branch, for inhibit it is low hold/low anti-switching during steady-state overvoltage and transient state mistake
Voltage, and under the extreme cases such as equipment fault, tripping, malfunction, back-up protection is provided for equipment；
Intelligent monitor system therein for monitoring low appearance/low anti-operating status, and is carrying out reactive compensation or bus
The control instruction that substation is received when voltage controls is divided further according to the control instruction of substation to the sending of flexible fling-cut switch branch
Reclosing command；Flexibility fling-cut switch branch therein, the divide-shut brake instruction for being issued according to intelligent monitor system, realizes low appearance
Or low anti-switching.
Above-mentioned voltage measurement branch includes concatenated high-voltage arm divider resistance R1 and low-voltage arm divider resistance R2, specifically
Have:
One end of high-voltage arm divider resistance R1 connects common point D, and other end low-voltage wiring terminal connects voltage measuring terminal
Sub- C；Described one end low-voltage arm divider resistance R2 connects voltage measurement terminal C, other end ground connection, the common point D and outlet
Terminal B connection, the outlet terminal B connect low appearance/low anti-high-voltage connection terminal.
It includes the first current transformer TA1 and metal oxide pressure-limiting device that above-mentioned overvoltage, which stabilizes branch, is specifically had:
The high-voltage connection terminal of first current transformer TA1 meets common point D, and low-voltage wiring terminal and metal oxide limit
The high-voltage connection terminal of depressor connects, the low-voltage wiring terminal ground connection of the metal oxide pressure-limiting device.
Above-mentioned flexible fling-cut switch branch includes disconnecting switch S, Failsafe switching K2, controlled switching switch K1 and
Two current transformer TA2, specifically have:
The high-voltage connection terminal of disconnecting switch S connects input terminal A, low-voltage wiring terminal connecting fault protective switch K2
High-voltage connection terminal, the high-voltage connection terminal company of the low-voltage wiring terminal of Failsafe switching K2 and controlled switching switch K1
It connects, the low-voltage wiring terminal of controlled switching switch K1 is connect with the high voltage nodes terminal of the second current transformer TA2, the second electric current
The low-voltage wiring terminal of mutual inductor TA2 is connect with common point D, the low-pressure side bus connection of input terminal A and transformer.
Above-mentioned intelligent monitor system concrete structure diagram is as shown in Fig. 2, it specifically includes state measuring block, monitoring and friendship
Mutual module, control protective module and display module, are separately below described in detail the function of these modules:
State measuring block therein receive the overvoltage that the first current transformer TA1 is sent stabilize branch electric current and
The electric current for the flexible fling-cut switch branch that second current transformer TA2 is sent, while the low-pressure side bus voltage of receiving transformer
And steady state voltage and transient voltage in low appearance/low anti-operational process, received electric current and voltage are converted into digital signal,
And digital signal is sent to monitoring and interactive module and control protective module；Monitoring therein and interactive module survey state
Measure the digital signal that module is sent and disconnecting switch S, Failsafe switching K2 and phase selection throwing in flexible fling-cut switch branch
The location status for cutting pass K1 is monitored and stores, while monitored results are sent to display module and substation；It is therein
Digital signal, the control command from substation and the flexible switching that control protective module is sent according to state measuring block
The location status of disconnecting switch S, Failsafe switching K2 and controlled switching switch K1 in switching branches, to disconnecting switch S, event
Hinder protective switch K2 and controlled switching switch K1 and issues switching order；Display module therein is for showing monitored results
Show.
From figure 2 it can be seen that it is Ct_0, Ct_1, Pt_0 and Pt_1 that the input quantity of state measuring block, which includes, pass through
Monitoring and interactive module and control protective module are sent into after the data handling procedures such as A/D conversion；
The input quantity of monitoring and interactive module further includes S, K1, K2 other than the data inputted by state measuring block
Opening and closing state Position_0, Position_1, Position_2, monitoring and interactive module output quantity be monitoring data and
Recorder data, while monitoring and interactive module with main website of substation can also carry out two-way data interaction.
The input quantity of protective module is controlled other than the data inputted by state measuring block, further includes point of S, K1, K2
"on" position Position_0, Position_1, Position_2 and refer to from low appearance/low anti-switching of substation
It enables.The output quantity of control protective module includes divide-shut brake order Contro_0, Contro_1 and Contro_2 of S, K1, K2, together
When control protective module and main website of substation can also carry out two-way data interaction.
Embodiment 2
The embodiment of the present invention 2 provide it is low in a kind of embodiment 1 hold the/control method of low anti-flexible fling-cut system, specifically
Three kinds of situations of control process point or less:
1) when it is low hold/low anti-flexible fling-cut system maintenance when, control protective module in the intelligent monitor system is to soft
Property fling-cut switch branch in disconnecting switch S and controlled switching switch K1 send separating brake order, make controlled switching switch K1 separating brake；
2) when it is low hold/it is low it is anti-break down when, the control protective module in the intelligent monitor system is opened to flexible switching
The Failsafe switching K2 closed in branch sends separating brake order, makes Failsafe switching K2 separating brake；
3) when carrying out reactive compensation or busbar voltage controls, the control instruction of substation is received, it is soft to carry out low appearance investment
Property control, it is low appearance cut out flexible control, low anti-investment flexible control or it is low it is anti-cut out flexible control.
Below to it is above-mentioned 3) in four kinds of control processes be described in detail:
A) in low appearance investment flexible control, after control protective module receives the low appearance instruction of investment that substation sends, Xiang Xuan
The two-phase switch contact of phase fling-cut switch K1 sends reclosing command, is closed two-phase switch contact, and after 1/4 power frequency period
When zero passage (i.e. neutral point and third phase busbar voltage simultaneously) sends combined floodgate to the third phase switch contact of controlled switching switch K1
Instruction is closed third phase switch contact.
B) low appearance is cut out in flexible control, after what control protective module reception substation sent cuts out low appearance instruction, low
Hold before each phase current zero crossing (when specific pre-set time is contact travel needed for reaching the fracture clearance distance of no repeated breakdown
Between, i.e., separating brake order and the low time held each phase current and reach zero crossing are sent to each phase switch contact of controlled switching switch K1
Interval are as follows: the fracture between each phase switch contact of controlled switching switch K1 reaches needed for the fracture clearance distance of no repeated breakdown
The contact travel time) to the transmission separating brake order of each phase switch contact of controlled switching switch K1, make each phase switch contact separating brake；
C) in low anti-investment flexible control, after control protective module receives the low anti-instruction of investment that substation sends, becoming
Reclosing command is sent to each phase switch contact of controlled switching switch K1 when each phase voltage of the low-pressure side bus of depressor reaches peak value,
Each phase switch contact is set to close a floodgate.
D) in low anti-cut flexible control out, after what control protective module reception substation sent cuts out low anti-instruction, low
Before resisting each phase current zero crossing (when specific pre-set time is contact travel needed for fracture reaches the clearance distance of no repeated breakdown
Between, i.e., separating brake order and the low time for resisting each phase current to reach zero crossing are sent to each phase switch contact of controlled switching switch K1
Interval are as follows: contact needed for the fracture between each phase switch contact of controlled switching switch K1 reaches the clearance distance of no repeated breakdown
Journey time) to the transmission separating brake order of each phase switch contact of controlled switching switch K1, make each phase switch contact separating brake.
For convenience of description, each section of apparatus described above is divided into various modules with function or unit describes respectively.
Certainly, each module or the function of unit can be realized in same or multiple softwares or hardware when implementing the application.
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.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute
The those of ordinary skill in category field can still modify to a specific embodiment of the invention referring to above-described embodiment or
Equivalent replacement, these are applying for this pending hair without departing from any modification of spirit and scope of the invention or equivalent replacement
Within bright claims.
Claims (10)
1. it is a kind of it is low hold/low anti-flexible fling-cut system, it is described it is low to hold be low-pressure side shunt capacitor, it is described low to resist for low-pressure side simultaneously
Join reactor, which is characterized in that the system comprises:
Voltage measurement branch, for measuring steady state voltage and transient voltage in low appearance/low anti-operational process；
Overvoltage stabilizes branch, for inhibit it is low hold/low anti-switching during steady-state overvoltage and transient overvoltage；
Intelligent monitor system, for monitor it is low hold/low anti-operating status, and according to the control instruction of substation to flexible switching
Switching branches issue divide-shut brake instruction；
Flexible fling-cut switch branch, the divide-shut brake instruction for being issued according to intelligent monitor system, realizes low perhaps low anti-throwing
It cuts.
2. low appearance according to claim 1/low anti-flexible fling-cut system, which is characterized in that the voltage measurement branch packet
Include concatenated high-voltage arm divider resistance R1 and low-voltage arm divider resistance R2；
One end of the high-voltage arm divider resistance R1 connects common point D, and other end low-voltage wiring terminal connects voltage measuring terminal
Sub- C；Described one end low-voltage arm divider resistance R2 connects voltage measurement terminal C, other end ground connection, the common point D and outlet
Terminal B connection, the outlet terminal B connect low appearance/low anti-high-voltage connection terminal.
3. low appearance according to claim 1/low anti-flexible fling-cut system, which is characterized in that the overvoltage stabilizes branch
Including the first current transformer TA1 and metal oxide pressure-limiting device；
The high-voltage connection terminal of the first current transformer TA1 meets common point D, and low-voltage wiring terminal and metal oxide limit
The high-voltage connection terminal of depressor connects, the low-voltage wiring terminal ground connection of the metal oxide pressure-limiting device.
4. low appearance according to claim 1/low anti-flexible fling-cut system, which is characterized in that the flexibility fling-cut switch branch
Road includes disconnecting switch S, Failsafe switching K2, controlled switching switch K1 and the second current transformer TA2；
The high-voltage connection terminal of the disconnecting switch S connects input terminal A, low-voltage wiring terminal connecting fault protective switch K2
High-voltage connection terminal, the high-voltage connection terminal of the low-voltage wiring terminal of the Failsafe switching K2 and controlled switching switch K1
Connection, the low-voltage wiring terminal of the controlled switching switch K1 are connect with the high voltage nodes terminal of the second current transformer TA2, institute
The low-voltage wiring terminal for stating the second current transformer TA2 is connect with common point D, the low-pressure side of the input terminal A and transformer
Bus connection.
5. low appearance according to claim 1/low anti-flexible fling-cut system, which is characterized in that the intelligent monitor system packet
Include state measuring block, monitoring and interactive module, control protective module and display module；
The state measuring block reception overvoltage stabilizes the overvoltage that the first current transformer TA1 is sent in branch and stabilizes branch
Electric current and flexible fling-cut switch branch in the electric current of flexible fling-cut switch branch that sends of the second current transformer TA2, together
When receiving transformer low-pressure side bus voltage and it is low hold/low anti-operational process in steady state voltage and transient voltage, will connect
The electric current and voltage of receipts are converted to digital signal, and digital signal is sent to monitoring and interactive module and control protection mould
Block；The isolation in digital signal and flexibility fling-cut switch branch that the monitoring and interactive module send state measuring block
The location status of switch S, Failsafe switching K2 and controlled switching switch K1 are monitored and store, while monitored results being sent out
Give display module and substation；It is described control protective module sent according to state measuring block digital signal, from change
The control command in power station and disconnecting switch S, Failsafe switching K2 and controlled switching switch in flexible fling-cut switch branch
The location status of K1 issues switching order to disconnecting switch S, Failsafe switching K2 and controlled switching switch K1；The display
Module is for showing monitored results.
6. a kind of low appearance a method as claimed in any one of claims 1 to 5/low anti-flexible fling-cut system control method, which is characterized in that
Include:
When it is described it is low hold/low anti-flexible fling-cut system maintenance when, control protective module in the intelligent monitor system is to flexibility
Disconnecting switch S and controlled switching switch K1 in fling-cut switch branch send separating brake order, make controlled switching switch K1 separating brake；
When it is described it is low hold/it is low it is anti-break down when, control protective module in the intelligent monitor system is to flexible fling-cut switch
Failsafe switching K2 in branch sends separating brake order, makes Failsafe switching K2 separating brake；
When receiving the control instruction of substation, low appearance investment flexible control is carried out, low appearance cuts out flexible control, low anti-investment
Flexible control or low anti-cut flexible control out.
7. low appearance according to claim 6/low anti-flexible fling-cut system control method, which is characterized in that the low appearance
It puts into flexible control, after the control protective module receives the low appearance instruction of investment that substation sends, is switched to controlled switching
The two-phase switch contact of K1 sends reclosing command, is closed two-phase switch contact, and open after 1/4 power frequency period to controlled switching
The third phase switch contact for closing K1 sends reclosing command, is closed third phase switch contact.
8. low appearance according to claim 6/low anti-flexible fling-cut system control method, which is characterized in that the low appearance
It cuts out in flexible control, after what the control protective module reception substation sent cuts out low appearance instruction, holds each phase current low
Separating brake order is sent to each phase switch contact of controlled switching switch K1 before zero crossing, makes each phase switch contact separating brake；
Separating brake order and the low time held each phase current and reach zero crossing are sent to each phase switch contact of controlled switching switch K1
Interval are as follows: the fracture between each phase switch contact of the controlled switching switch K1 reaches the fracture clearance distance institute of no repeated breakdown
The contact travel time needed.
9. low appearance according to claim 6/low anti-flexible fling-cut system control method, which is characterized in that described low anti-
It puts into flexible control, after the control protective module receives the low anti-instruction of investment that substation sends, in the low pressure of transformer
Reclosing command is sent to each phase switch contact of controlled switching switch K1 when each phase voltage of side bus reaches peak value, switchs each phase
Contact closes a floodgate.
10. low appearance according to claim 6/low anti-flexible fling-cut system control method, which is characterized in that described low anti-
It cuts out in flexible control, after the control protective module receives the low anti-instruction that substation sends, resists each phase current zero passage low
Separating brake order is sent to each phase switch contact of controlled switching switch K1 before point, makes each phase switch contact separating brake；
Separating brake order and the low time for resisting each phase current to reach zero crossing are sent to each phase switch contact of controlled switching switch K1
Interval are as follows: the fracture between each phase switch contact of the controlled switching switch K1 reaches needed for the clearance distance of no repeated breakdown
The contact travel time.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111007308A (en) * | 2019-12-28 | 2020-04-14 | 广东电网有限责任公司电力科学研究院 | Overvoltage monitoring method, device and equipment |
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