CN110492485A - Filter resistor branch protection method, system and medium for double tunning alternating current filter - Google Patents
Filter resistor branch protection method, system and medium for double tunning alternating current filter Download PDFInfo
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- CN110492485A CN110492485A CN201910880986.9A CN201910880986A CN110492485A CN 110492485 A CN110492485 A CN 110492485A CN 201910880986 A CN201910880986 A CN 201910880986A CN 110492485 A CN110492485 A CN 110492485A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/12—Measuring rate of change
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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
- H02J3/01—Arrangements for reducing harmonics or ripples
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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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
- H02J2003/365—Reducing harmonics or oscillations in HVDC
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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
- Y02E40/40—Arrangements for reducing harmonics
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses head end branch current, 11 subharmonic current I that a kind of filter resistor branch protection method, system and medium for double tunning alternating current filter, the present invention pass through acquisition double tunning alternating current filter in real time11(t) and 13 subharmonic current I13(t)；Judge following two conditions whether and meanwhile set up: if in a short time, I11(t)、I13(t) variation quantity symbol is positive simultaneously, kset*I0Value be less than head end branch current harmonic wave total content, while set up then determine resistor Arcing fault protection issue alarm signal.The present invention solves the problems, such as fault-free warning information when existing alternating current filter resistance branch arc discharge; it can be alerted in time when resistance branch Arcing fault occurs in filter; a possibility that fault spread can be effectively reduced; ensure the stability of converter station operation; the operation stability for improving filter simultaneously, has many advantages, such as that high reliablity, universality are strong.
Description
Technical field
The present invention relates to filter protection technologies, and in particular to a kind of filter resistor for double tunning alternating current filter
Branch protection method, system and medium can pass through the realization pair of the changes of contents of real-time detection filter head end branch harmonic current
The timely alarm of filter resistor leg resistors arc discharge.
Background technique
Increasingly increase with the rapid growth and each industry of Chinese national economy to electricity needs, China's power industry
Enter the stage of a super-speed development.For HVDC transmission system also because of its long range, the electric transportation properties of large capacity are wide
It is general to be applied in the West-to-East Electricity Transmission Project, and increasingly important role is played in electric system whole nation interconnection engineering.Double tunning is handed over
Important equipment of the filter as HVDC transmission system is flowed, the characteristic harmonics for filtering out DC control system is played and carries out nothing
The effect of function compensation, therefore can it operate normally will directly affect the reactive power and high voltage direct current electricity of AC system
Conveying.In order to enable double tunning alternating current filter safe and stable operation under various operating conditions, it is necessary to the exchange of reasonable disposition double tunning
The protection scheme of filter.Currently, the protection about double tunning alternating current filter internal element is roughly divided into three classes: being directed to reactance
The detuning protection of device parameter shift setting；For the overload protection and zero-sequence over-current protection of the setting of reactor overcurrent damage；Needle
The internal fuse protected and unbalance protection that capacitor breakdown or melting fault are arranged.Although protection is right to a certain extent above
The reliability service of double tunning alternating current filter provides guarantee, but these methods are all built upon enhancing to double tunning ac filter
In device in the protection and control of inductance capacitor element.In the recent period, certain ultra-high voltage converter station has occurred together since HP12/24 type exchanges
Resistance branch discharge accident caused by connection bolt looseness inside filter resistors.Although the resistance value of resistor is because of arc discharge
Violent variation has occurred, but since resistance branch electric current itself is smaller (amplitude only has several peaces), flows through the feature electricity of failure phase
Significant change does not occur for stream, and overload, detuning protection that alternating current filter itself configures etc. do not generate warning information, protects
It is not operating.If non-at-scene routine tour personnel discovery, may cause the further expansion of accident.
Summary of the invention
The technical problem to be solved in the present invention: double tunning AC filter protection there are aiming at the problem that, a kind of use is provided
In filter resistor branch protection method, system and the medium of double tunning alternating current filter, before the present invention is not increase hardware
It mentions, solves the problems, such as fault-free warning information when existing alternating current filter resistance branch arc discharge, filter can worked as
A possibility that alerting in time when interior generation resistance branch Arcing fault, fault spread can be effectively reduced, it is ensured that converter station
The stability of operation, while the operation stability of filter is improved, have many advantages, such as that high reliablity, universality are strong.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:
A kind of filter resistor branch protection method for double tunning alternating current filter, implementation steps include:
1) head end branch current total harmonic distortion I, the 11 subharmonic current I of double tunning alternating current filter are obtained in real time11(t)
And 13 subharmonic current I13(t)；
2) judge following two conditions (1) and (2) whether and meanwhile set up, jumped if setting up simultaneously and execute step 3)；
Condition (1): 11 subharmonic current I in the specified short time11(t) variable quantity and 13 subharmonic current I13(t)
Variation quantity symbol is positive simultaneously；
Condition (2): kset*I0Value be less than head end branch current total harmonic distortion I, wherein ksetFor preset movement threshold
Coefficient, I0For the total harmonic distortion for flowing through alternating current filter head end branch current when system normal operation；
3) determine that the protection of resistor Arcing fault issues alarm signal.
Optionally, the preset movement threshold coefficient ksetValue be Is/I0, wherein IsAc filter is in for system
Device can bear the total harmonic distortion that alternating current filter head end branch is flowed through when the bound of voltage or frequency fluctuation range.
Optionally, the double tunning alternating current filter is HP12/24 type double tunning alternating current filter, the HP12/24 type
The scope range of the fluctuation of voltage that double tunning alternating current filter can be born is 475~550kV, the frequency fluctuation range that can be born is 49.5~
50.5HZ。
Optionally, the preset movement threshold coefficient ksetValue be 1.2.
Optionally, the specific judgment mode of step 2) conditional (1) are as follows:
S1) one time window t is set, with the interval real-time detection double tunning alternating current filter head end of 1s in time window t
11 subharmonic current I of branch11(t), 13 subharmonic current I13(t)；
S2) by 11 subharmonic current I11(t) difference is carried out by way of later moment in time subtracts previous moment to be calculated
Difference △ I1, by 13 subharmonic current I13(t) it is calculated carrying out difference in the form of later moment in time subtracts previous moment
Difference △ I2；
S3) by difference △ I1, difference △ I2It carries out product and result △ I is calculated1*△I2, and if result △ I1*△I2
For canonical decision condition (1) establishment.
Optionally, step S1) in time window t value meet t ∈ [0,60).
In addition, the present invention also provides a kind of filter resistor branch protection system for double tunning alternating current filter, packet
It includes:
Data acquisition program unit, for obtaining total harmonic distortion I, the 11 subharmonic electricity of double tunning alternating current filter in real time
Flow I11(t) and 13 subharmonic current I13(t)；
Condition determining program unit, for judge following two conditions (1) and (2) whether and meanwhile set up, if simultaneously at
It is vertical then jump execution protection execute program unit；Condition (1): 11 subharmonic current I in the specified short time11(t) variable quantity
With 13 subharmonic current I13(t) variation quantity symbol is positive simultaneously；Condition (2): kset*I0Value be less than total harmonic distortion I,
Middle ksetFor preset movement threshold coefficient, I0To flow through the total humorous of alternating current filter head end branch current when system normal operation
Wave content；
Protection executes program unit, for determining that the protection of resistor Arcing fault issues alarm signal.
In addition, the present invention also provides a kind of filter resistor branch protection system for double tunning alternating current filter, packet
Computer equipment is included, which is programmed or configures to execute the filter electricity for double tunning alternating current filter
It is stored on the storage medium of the step of hindering branch protection method or the computer equipment and is programmed or configures to execute the use
In the computer program of the filter resistor branch protection method of double tunning alternating current filter.
In addition, the present invention also provides a kind of filter resistor branch protection system for double tunning alternating current filter, packet
Double tunning alternating current filter and computer equipment are included, the head end branch road of the double tunning alternating current filter is equipped with for detecting head
Hold the head end branch current mutual inductor of branch current, the output end and computer equipment phase of the head end branch current mutual inductor
Even, which is programmed or configures to execute the filter resistor branch protection for being used for double tunning alternating current filter
It is stored on the storage medium of the step of method or the computer equipment and is programmed or configures to execute the double tunning that is used for and hand over
Flow the computer program of the filter resistor branch protection method of filter.
In addition, being stored on the computer readable storage medium the present invention also provides a kind of computer readable storage medium
It is programmed or configures to execute the computer journey of the filter resistor branch protection method for double tunning alternating current filter
Sequence.
Compared to the prior art, the present invention has an advantage that
1, the present invention to flow through the total harmonic distortion of filters in series branch current as the starting amount protected, according to escaping
System voltage, frequency fluctuation determine threshold value, it is ensured that protection is reliably failure to actuate when not breaking down in filter.
2, present invention utilizes 11,13 subharmonic currents that series arm is flowed through when resistive element parameter shift to become in the same direction
Change；When there is parameter shift in capacitor and inductor element, the characteristics of flowing through 11, the 13 subharmonic currents equal inverse change of series arm work
For the criterion of protection alarm, the acute variation of alternating current filter resistive element numerical value can reliably be detected.
3, preset movement threshold coefficient k in the present inventionsetValue has the alternating current filter under same system pervasive
Property.
4, the characteristic current that the present invention utilizes is achieved with by the original current transformer of filter, other without increasing
Measuring cell has good applicability.
Detailed description of the invention
Fig. 1 is HP12/24 of embodiment of the present invention type double tunning alternating current filter structure chart.
Fig. 2 is the basic procedure schematic diagram of present invention method.
Fig. 3 is double tunning alternating current filter resistor R in the embodiment of the present invention1Current curve when parameter shift.
Fig. 4 is the change curve of resistor in series bypass elements parameter shift characteristic current in the embodiment of the present invention.
Fig. 5 is the change curve of capacitor in parallel bypass elements parameter shift characteristic current in the embodiment of the present invention.
Specific embodiment
It hereafter will be by taking the double tunning alternating current filter of HP12/24 type shown in Fig. 1 as an example, to the present invention for double tunning exchange filter
Filter resistor branch protection method, system and the medium of wave device are described in further detail.As shown in Figure 1, HP12/24
The basic parameter of type double tunning alternating current filter is；C1=2.987 μ F, L1=11.819mH, C2=5.593 μ F, L2=
5.889mH R1=300 Ω, and in same system the filter parameter it is all the same.
As shown in Fig. 2, the implementation steps of the filter resistor branch protection method of the present embodiment include:
1) head end branch current total harmonic distortion I, the 11 subharmonic current I of double tunning alternating current filter are obtained in real time11(t)
And 13 subharmonic current I13(t)；
2) judge following two conditions (1) and (2) whether and meanwhile set up, jumped if setting up simultaneously and execute step 3)；
Condition (1): 11 subharmonic current I in the specified short time11(t) variable quantity and 13 subharmonic current I13(t)
Variation quantity symbol is positive simultaneously；
Condition (2): kset*I0Value be less than head end branch current total harmonic distortion I, wherein ksetFor preset movement threshold
Coefficient, I0For the total harmonic distortion for flowing through alternating current filter head end branch current when system normal operation；In the present embodiment, I0=
11.78%.
3) determine that the protection of resistor Arcing fault issues alarm signal.
It should be noted that Fig. 2 show the mode of first Rule of judgment (1), Rule of judgment (2) again, furthermore can also adjust
It changes and states judgement sequence, as long as it, which meets condition (1) and (2) while setting up to jump, executes step 3).The present embodiment passes through
Aforesaid way solves the problems, such as fault-free warning information when existing alternating current filter resistance branch arc discharge, can work as
A possibility that alerting in time when resistance branch Arcing fault, fault spread can be effectively reduced occurs in filter, it is ensured that
The stability of converter station operation, while the operation stability of filter is improved, have many advantages, such as that high reliablity, universality are strong.
In the present embodiment, the preset movement threshold coefficient ksetValue be Is/I0, wherein IsExchange is in for system
Filter can bear the total harmonic distortion that alternating current filter head end branch is flowed through when the bound of voltage or frequency fluctuation range.
In the present embodiment, the double tunning alternating current filter is HP12/24 type double tunning alternating current filter, the HP12/
The scope range of the fluctuation of voltage that 24 type double tunning alternating current filters can be born is 475~550kV, and the frequency fluctuation range that can be born is
49.5~50.5HZ.Under the premise of guaranteeing that the HP12/24 type alternating current filter under same system has universality, the present embodiment
In, preset movement threshold coefficient ksetValue be 1.2.HP12/24 type alternating current filter resistance thermal overload in the present embodiment
Protect definite value specifically as shown in table 1:
Table 1:HP12/24 type alternating current filter resistance thermal overload protection definite value.
In the present embodiment, the specific judgment mode of step 2) conditional (1) are as follows:
S1) one time window t is set, with the interval real-time detection double tunning alternating current filter head end of 1s in time window t
11 subharmonic current I of branch11(t), 13 subharmonic current I13(t)；I11(t) there is stream when component parameters deviate t for filter
11 subharmonic currents of wave filter head end branch；I13(t) occur flowing through filter head end when component parameters deviate t for filter
13 subharmonic currents of branch；
S2) by 11 subharmonic current I11(t) difference is carried out by way of later moment in time subtracts previous moment to be calculated
Difference △ I1, by 13 subharmonic current I13(t) it is calculated carrying out difference in the form of later moment in time subtracts previous moment
Difference △ I2；
S3) by difference △ I1, difference △ I2It carries out product and result △ I is calculated1*△I2, and if result △ I1*△I2
For canonical decision condition (1) establishment.
In the present embodiment, step S1) in time window t value meet t ∈ [0,60).
As shown in figure 3, changing resistor R by taking the basic parameter of HP12/24 type double tunning alternating current filter as an example1Value,
The content of 11,13 subharmonic currents of head end branch can also change therewith.With resistance value R1Increase, filter head end branch
11,13 subharmonic contents be in rising trend；Conversely, with resistance value R1Reduction, 11, the 13 of filter head end branch
Subharmonic content is in downward trend.
As shown in Figure 4 and Figure 5, by taking the basic parameter of HP12/24 type double tunning alternating current filter as an example, change series connection respectively
Branch L1、C1, parallel branch L2、C211,13 subharmonic current contents of the parameter value of four elements, head end branch present
Identical changing rule.With the forward migration of parameter value, the content of 11,13 subharmonic currents of filter head end branch is presented
13 subharmonic contents are reduced while inverse change, i.e. 11 subharmonic contents increase.
In conclusion in view of the above problems in the prior art, the present invention is combining double tune premised on not increasing hardware
The impedance frequency characteristics of humorous alternating current filter, filters in series branch 11,13 when comparative analysis R, L, C-element parameter shift
On the basis of the changing rule of subharmonic current, propose a kind of with the 11 of filters in series branch, 13 subharmonic current contents
The amount of being characterized, and preset movement threshold coefficient is set by the variation of total harmonic distortion caused by system voltage or frequency fluctuation is escaped
ksetFilter damp guard method, when so that system being judged as resistor Arcing fault, protection issue alarm signal；
Present invention improves the characteristics of fault-free warning information, can be effectively reduced when existing alternating current filter resistance branch arc discharge
A possibility that fault spread, it is ensured that the stability of converter station operation has the advantages that good compatibility, is transformed convenient for technology upgrading.
It should be noted that since the time that accident occurs for double tunning alternating current filter is shorter, double tunning alternating current filter
The probability that shifts is extremely low simultaneously for multiple element parameter, therefore does not consider what multiple element parameter changed simultaneously in the present embodiment
Situation, there is a situation where Parameters variations for discrete component when only considering to break down.
In addition, the present embodiment also provides a kind of filter resistor branch protection system for double tunning alternating current filter,
Include:
Data acquisition program unit, for obtaining total harmonic distortion I, the 11 subharmonic electricity of double tunning alternating current filter in real time
Flow I11(t) and 13 subharmonic current I13(t)；
Condition determining program unit, for judge following two conditions (1) and (2) whether and meanwhile set up, if simultaneously at
It is vertical then jump execution protection execute program unit；Condition (1): 11 subharmonic current I in the specified short time11(t) variable quantity
With 13 subharmonic current I13(t) variation quantity symbol is positive simultaneously；Condition (2): kset*I0Value be less than total harmonic distortion I,
Middle ksetFor preset movement threshold coefficient, I0To flow through the total humorous of alternating current filter head end branch current when system normal operation
Wave content；
Protection executes program unit, for determining that the protection of resistor Arcing fault issues alarm signal.
In addition, the present embodiment also provides a kind of filter resistor branch protection system for double tunning alternating current filter,
Including computer equipment, which is programmed or configures to execute the filter for being used for double tunning alternating current filter
Be stored on the storage medium of the step of resistance branch guard method or the computer equipment be programmed or configure it is described to execute
The computer program of filter resistor branch protection method for double tunning alternating current filter.
In addition, the present embodiment also provides a kind of filter resistor branch protection system for double tunning alternating current filter,
Including double tunning alternating current filter and computer equipment, the head end branch road of the double tunning alternating current filter is equipped with for detecting
The head end branch current mutual inductor of head end branch current, the output end and computer equipment phase of the head end branch current mutual inductor
Even, which is programmed or configures to execute the filter resistor branch protection for being used for double tunning alternating current filter
It is stored on the storage medium of the step of method or the computer equipment and is programmed or configures to execute the double tunning that is used for and hand over
Flow the computer program of the filter resistor branch protection method of filter.
In addition, the present embodiment also provides a kind of computer readable storage medium, stored on the computer readable storage medium
Have and is programmed or configures to execute the computer of the filter resistor branch protection method for double tunning alternating current filter
Program.
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 work in a specific way
In the computer-readable memory of work, so that it includes command device that instruction stored in the computer readable memory, which generates,
Manufacture, the command device are realized in one or more flows of the flowchart and/or one or more blocks of the block diagram
In specify function.These computer program instructions also can be loaded onto a computer or other programmable data processing device, and make
It obtains and executes series of operation steps on a computer or other programmable device to generate computer implemented processing, thus counting
The instruction executed on calculation machine or other programmable devices is provided for realizing in one or more flows of the flowchart and/or side
The step of function of being specified in block diagram one box or multiple boxes.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of filter resistor branch protection method for double tunning alternating current filter, it is characterised in that implementation steps packet
It includes:
1) head end branch current total harmonic distortion I, the 11 subharmonic current I of double tunning alternating current filter are obtained in real time11(t) and
13 subharmonic current I13(t)；
2) judge following two conditions (1) and (2) whether and meanwhile set up, jumped if setting up simultaneously and execute step 3)；
Condition (1): 11 subharmonic current I in the specified short time11(t) variable quantity and 13 subharmonic current I13(t) variation
Quantity symbol is positive simultaneously；
Condition (2): kset*I0Value be less than head end branch current total harmonic distortion I, wherein ksetFor preset movement threshold coefficient,
I0For the total harmonic distortion for flowing through alternating current filter head end branch current when system normal operation；
3) determine that the protection of resistor Arcing fault issues alarm signal.
2. the filter resistor branch protection method according to claim 1 for double tunning alternating current filter, feature
It is, the preset movement threshold coefficient ksetValue be Is/I0, wherein IsElectricity can be born by being in alternating current filter for system
The total harmonic distortion of alternating current filter head end branch is flowed through when the bound of pressure or frequency fluctuation range.
3. the filter resistor branch protection method according to claim 2 for double tunning alternating current filter, feature
It is, the double tunning alternating current filter is HP12/24 type double tunning alternating current filter, the HP12/24 type double tunning exchange
The scope range of the fluctuation of voltage that filter can be born is 475~550kV, and the frequency fluctuation range that can be born is 49.5~50.5HZ.
4. the filter resistor branch protection method according to claim 1 for double tunning alternating current filter, feature
It is, the preset movement threshold coefficient ksetValue be 1.2.
5. being protected described according to claim 1~any one of 4 for the filter resistor branch of double tunning alternating current filter
Maintaining method, which is characterized in that the specific judgment mode of step 2) conditional (1) are as follows:
S1) one time window t is set, with the interval real-time detection double tunning alternating current filter head end branch of 1s in time window t
11 subharmonic current I11(t), 13 subharmonic current I13(t)；
S2) by 11 subharmonic current I11(t) difference being carried out by way of later moment in time subtracts previous moment, difference is calculated
△I1, by 13 subharmonic current I13(t) difference is calculated carrying out difference in the form of later moment in time subtracts previous moment
△I2；
S3) by difference △ I1, difference △ I2It carries out product and result △ I is calculated1*△I2, and if result △ I1*△I2It is positive
Then decision condition (1) is set up.
6. the filter resistor branch protection method according to claim 5 for double tunning alternating current filter, feature
Be, step S1) in time window t value meet t ∈ [0,60).
7. a kind of filter resistor branch protection system for double tunning alternating current filter, characterized by comprising:
Data acquisition program unit, for obtaining total harmonic distortion I, the 11 subharmonic current I of double tunning alternating current filter in real time11
(t) and 13 subharmonic current I13(t)；
Condition determining program unit, for judge following two conditions (1) and (2) whether and meanwhile set up, if setting up simultaneously
It jumps execution protection and executes program unit；Condition (1): 11 subharmonic current I in the specified short time11(t) variable quantity and 13
Subharmonic current I13(t) variation quantity symbol is positive simultaneously；Condition (2): kset*I0Value be less than total harmonic distortion I, wherein kset
For preset movement threshold coefficient, I0Contain to flow through total harmonic wave of alternating current filter head end branch current when system normal operation
Amount；
Protection executes program unit, for determining that the protection of resistor Arcing fault issues alarm signal.
8. a kind of filter resistor branch protection system for double tunning alternating current filter, including computer equipment, feature
It is, which is programmed or configures to filter described in any one of perform claim requirement 1~6 for double tunning exchange
It is stored on the storage medium of the step of filter resistor branch protection method of wave device or the computer equipment and is programmed or matches
It sets to be used for the filter resistor branch protection side of double tunning alternating current filter described in any one of perform claim requirement 1~6
The computer program of method.
9. a kind of filter resistor branch protection system for double tunning alternating current filter, which is characterized in that including double tunning
The head end branch road of alternating current filter and computer equipment, the double tunning alternating current filter is equipped with for detecting head end branch electricity
The head end branch current mutual inductor of stream, the output end of the head end branch current mutual inductor are connected with computer equipment, the calculating
Machine equipment is programmed or is configured to be used for the filtering of double tunning alternating current filter described in any one of perform claim requirement 1~6
It is stored on the storage medium of the step of device resistance branch guard method or the computer equipment and is programmed or configures with right of execution
Benefit require any one of 1~6 described in for double tunning alternating current filter filter resistor branch protection method computer
Program.
10. a kind of computer readable storage medium, which is characterized in that be stored on the computer readable storage medium be programmed or
Configuration is with the filter resistor branch protection described in any one of perform claim requirement 1~6 for double tunning alternating current filter
The computer program of method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910880986.9A CN110492485B (en) | 2019-09-18 | 2019-09-18 | Filter resistance branch protection method, system and medium for double-tuned alternating current filter |
Applications Claiming Priority (1)
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