CN109591626A - Guard method, system, device and the storage medium of pre-charge resistance - Google Patents
Guard method, system, device and the storage medium of pre-charge resistance Download PDFInfo
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- CN109591626A CN109591626A CN201811186966.3A CN201811186966A CN109591626A CN 109591626 A CN109591626 A CN 109591626A CN 201811186966 A CN201811186966 A CN 201811186966A CN 109591626 A CN109591626 A CN 109591626A
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the present invention provides guard method, system, device and the storage medium of a kind of pre-charge resistance; the preliminary filling circuit powered on applied to high pressure; preliminary filling circuit includes the circuit being made of charge power supply, pre-charge resistance, preliminary filling contactor and load; the guard method of pre-charge resistance includes: to judge whether the charging voltage for loading both ends meets and charging requirement corresponding to the preset charged stage when preliminary filling circuit turn-on time reaches the preset charged stage；If not meeting charging requirement corresponding to the preset charged stage, preliminary filling contactor is disconnected, and export abnormal alarm signal corresponding with the preset charged stage；Wherein, the entire charging process in preliminary filling circuit is divided into several preset chargeds stage according to charging time length, and each preset charged stage is provided with corresponding charging requirement and abnormal alarm mode.The embodiment of the present invention realizes preliminary filling circuit abnormal quick identification and early warning protection, improves pre-charge resistance safety by grading forewarning system mechanism.
Description
Technical field
The present embodiments relate to field electric vehicle engineering fields, more specifically to a kind of pre-charge resistance
Guard method, system, device and storage medium.
Background technique
Such as motor driver high-tension apparatus in electric car, high pressure, which powers on, is required to preliminary filling circuit.It is shown in Figure 1,
It is the circuit theory schematic diagram that typical high pressure powers on preliminary filling circuit, wherein R indicates a virtual resistance, reflects electrical equipment 14
Whether abnormal, the resistance value of the equivalent resistance R of electrical equipment is very big under normal circumstances, and the resistance value of equivalent resistance R is smaller, indicates to use
Electric equipment 14 breaks down more serious；When normal high pressure preliminary filling, after preliminary filling contactor Kp closure, by pre-charge resistance Rp and electricity consumption
The equivalent capacity C of equipment forms the circuit RC, preliminary filling for a period of time after electrical equipment equivalent capacity C both end voltage and high voltage direct current
11 voltage of power supply is almost the same, is closed main contactor Km at this time, then disconnects preliminary filling contactor Kp again, indicates that high pressure powers at this time
It completes；When certain abnormal such as short circuit etc. occurs for electrical equipment, the resistance value for showing as the equivalent resistance R of electrical equipment is very small,
It is 0 when short-circuit, causes 14 both end voltage of electrical equipment when preliminary filling that can not be increased to the voltage close to high-voltage DC power supply 11 always,
Pre-charge resistance Rp both end voltage value subtracts 14 both end voltage of electrical equipment for the voltage of high-voltage DC power supply 11 at this time, so with
The resistance value of the equivalent resistance R of electric equipment is smaller, then pre-charge resistance Rp both end voltage value is bigger, so as to cause pre-charge resistance Rp
Both ends, which persistently load big voltage, causes fever to damage.
In order to ensure the operational safety in preliminary filling circuit, the protection scheme in existing preliminary filling circuit is usually: high by detection
The pre-charge pressure during preliminary filling, the i.e. voltage at the both ends electrical equipment capacitor C are pressed, to continue to judge that pre-charge pressure is consistently lower than threshold
After value, just meeting alarm preliminary filling circuit is abnormal, and can not be charged normal.The judgement time of the protection scheme in this preliminary filling circuit compared with
It is long, the exception in preliminary filling circuit can not be detected at the first time, lead to that preliminary filling contact cannot be disconnected in time in preliminary filling circuit exception
Device loads relatively high power so that still there is higher voltage at pre-charge resistance both ends in such pre-charge resistance short time, be easy to cause
Make pre-charge resistance fast heating and damages.
Summary of the invention
The embodiment of the present invention provides guard method, system, equipment and the computer-readable storage medium of a kind of pre-charge resistance
Matter, it is intended to which solving the judgement time in above-mentioned existing preliminary filling loop protection technical solution in the abnormality detecting process of preliminary filling circuit holds
It is continuous longer, the exception in preliminary filling circuit can not be detected within first time, cannot be disconnected in time when preliminary filling circuit sends abnormal
Preliminary filling contactor, the problem of being easy to cause pre-charge resistance to damage.
The technical solution that the embodiment of the present invention solves above-mentioned technical problem is to provide a kind of protection side of pre-charge resistance
Method, applied to the preliminary filling circuit that high pressure powers on, the preliminary filling circuit includes by charge power supply, pre-charge resistance, preliminary filling contactor
And the circuit that load is constituted, the guard method of the pre-charge resistance include:
When turn-on time reaches the preset charged stage in the preliminary filling circuit, judge that the charging voltage at the load both ends is
It is no to meet and charging requirement corresponding to the preset charged stage；
If not meeting charging requirement corresponding to the preset charged stage, the preliminary filling contactor is disconnected, and export
Abnormal alarm signal corresponding with the preset charged stage；
Wherein, the entire charging process in the preliminary filling circuit is divided into several preset charged ranks according to charging time length
Section, each preset charged stage are provided with corresponding charging requirement and abnormal alarm mode.
In the guard method of above-mentioned pre-charge resistance, normal pre-charge electricity mistake is carried out to the load in the preliminary filling circuit
Cheng Zhong measures the voltage of load when preset duration, and generates predetermined voltage threshold according to the voltage measured.
In the guard method of above-mentioned pre-charge resistance, in the preliminary filling circuit, turn-on time reaches the preset charged stage
When, judge whether the charging voltage at the load both ends meets includes: with charging requirement corresponding to the preset charged stage
When turn-on time reached for the first preset charged stage in the preliminary filling circuit, the charging electricity at the load both ends is judged
Whether pressure is less than first voltage threshold value；Wherein, it is judged as when the preliminary filling circuit, turn-on time reaches the first preset time t 1
Reach the first preset charged stage, t1 > 0；
If described do not meet charging requirement corresponding to the preset charged stage, the preliminary filling contactor is disconnected, and
Exporting abnormal alarm signal corresponding with the preset charged stage includes:
If the charging voltage is less than the first voltage threshold value, the charging in the first preset charged stage is not met
It is required that disconnecting the preliminary filling contactor at this time, and export level-one abnormal alarm signal.
In the guard method of above-mentioned pre-charge resistance, in the preliminary filling circuit, turn-on time reaches the first preset charged rank
Duan Shi, judges whether the charging voltage at the load both ends is less than after first voltage threshold value further include:
If the charging voltage is greater than or equal to the first voltage threshold value, in the preliminary filling circuit, turn-on time reaches
When the second preset charged stage, judge whether the charging voltage at the load both ends is less than second voltage threshold value；Wherein, when described
Preliminary filling circuit turn-on time is judged as when reaching the second preset time t 2 reaches the second preset charged stage, t2 > t1 > 0；
If the charging voltage is less than the second voltage threshold value, the charging in the second preset charged stage is not met
It is required that disconnecting the preliminary filling contactor at this time, and export second level abnormal alarm signal.
In the guard method of above-mentioned pre-charge resistance, in the preliminary filling circuit, turn-on time reaches the second preset charged rank
Duan Shi, judges whether the charging voltage at the load both ends is less than after second voltage threshold value further include:
If the charging voltage is greater than or equal to the second voltage threshold value, in the preliminary filling circuit, turn-on time reaches
When the third preset charged stage, judge whether the charging voltage at the load both ends is less than tertiary voltage threshold value；Wherein, when described
Preliminary filling circuit turn-on time is judged as when reaching third preset time t 3 reaches the third preset charged stage, and t3 > t2 > t1 >
0；
If the charging voltage is less than the tertiary voltage threshold value, the charging in the third preset charged stage is not met
It is required that disconnecting the preliminary filling contactor at this time, and export three-level abnormal alarm signal.
In the guard method of above-mentioned pre-charge resistance, in the preliminary filling circuit, turn-on time reaches third preset charged rank
Duan Shi, judges whether the charging voltage at the load both ends is less than after tertiary voltage threshold value further include:
If the charging voltage is greater than or equal to the tertiary voltage threshold value, in the preliminary filling circuit, turn-on time reaches
When the 4th preset charged stage, judge the charging voltage at the load both ends whether less than the 4th voltage threshold；Wherein, when described
It is judged as when t4 the time required to preliminary filling circuit turn-on time is greater than presupposition theory charging complete and reaches the 4th preset charged rank
Section, t4 > t3 > t2 > t1 > 0；
If the charging voltage is less than the 4th voltage threshold, the charging in the 4th preset charged stage is not met
It is required that disconnecting the preliminary filling contactor at this time, and export level Four abnormal alarm signal.
In the guard method of above-mentioned pre-charge resistance, voltage threshold in charging requirement corresponding to each preset charged stage
The calculation of value is as follows:
Wherein, R is the resistance value of the equivalent resistance of the load, and C is the capacitance of the equivalent capacity of the load, VtFor
The voltage value at the load both ends, V when t momentuFor the voltage value at load described after charging complete both ends, V0For load both ends
Initial voltage value.
In the guard method of above-mentioned pre-charge resistance, the preliminary filling circuit further includes main contactor, the main contactor
With connect after the pre-charge resistance and the preliminary filling contactor it is in parallel, it is described to reach pre- in preliminary filling circuit turn-on time
If when the charging stage, judging whether the charging voltage at the load both ends meets and charging corresponding to the preset charged stage
After it is required that further include:
If the charging voltage meets charging requirement corresponding to the preset charged stage, at the load both ends
When voltage reaches target charging voltage, the preliminary filling contactor is disconnected, and be closed the main contactor.
The embodiment of the invention also provides a kind of preliminary filling loop protection systems, applied to the preliminary filling circuit that high pressure powers on, institute
Stating preliminary filling circuit includes the circuit being made of charge power supply, pre-charge resistance, preliminary filling contactor and load, the pre-charge resistance
Protection system include:
Charging voltage detection unit, for judging institute when preliminary filling circuit turn-on time reaches the preset charged stage
Whether the charging voltage for stating load both ends meets and charging requirement corresponding to the preset charged stage；
Abnormal alarm unit, if it is right not meet the preset charged stage institute for the charging voltage at the load both ends
When the charging requirement answered, the preliminary filling contactor is disconnected, and export abnormal alarm signal corresponding with the preset charged stage；
Wherein, the entire charging process in the preliminary filling circuit is divided into several preset charged ranks according to charging time length
Section, each preset charged stage are provided with corresponding charging requirement and abnormal alarm mode.
The embodiment of the present invention also provides a kind of protective device of pre-charge resistance, including memory and processor, and described
The computer program that can be run in the processor is stored in memory, the processor executes the computer program and realizes
The step of guard method of pre-charge resistance as described above.
The embodiment of the present invention also provides a kind of computer readable storage medium, stores on the computer readable storage medium
There is computer program, when the computer program is executed by processor, realizes the guard method of pre-charge resistance as described above
Step.
Guard method, system, device and the storage medium of the pre-charge resistance of the embodiment of the present invention, stage by stage detection load
Voltage, and load voltage is compared with the predetermined voltage threshold of respective stage, it grading forewarning system can be protected during preliminary filling,
It can quickly identify the exception in preliminary filling circuit, disconnect preliminary filling circuit in time when an abnormal situation occurs and export, protection precharge
Resistance prevents pre-charge resistance damage from leading to not completion load high pressure and powers on, improves the safety in preliminary filling circuit.
Detailed description of the invention
Fig. 1 is the circuit theory schematic diagram that typical high pressure powers on preliminary filling circuit in the prior art；
Fig. 2 is the flow diagram of the guard method of pre-charge resistance of the embodiment of the present invention；
Fig. 3 is the schematic diagram of the protective device of pre-charge resistance of the embodiment of the present invention；
Fig. 4 is the functional block diagram of the protection system of pre-charge resistance of the embodiment of the present invention.
Specific embodiment
In order to which the objects, technical solutions and advantages of the embodiment of the present invention are more clearly understood, below in conjunction with attached drawing and reality
Example is applied, the embodiment of the present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to
It explains the embodiment of the present invention, is not intended to limit the present invention embodiment.
As shown in Fig. 2, being the guard method flow chart of pre-charge resistance of the embodiment of the present invention, the protection of the pre-charge resistance
Method is applied to the preliminary filling circuit that high pressure powers on.As shown in Figure 1, above-mentioned preliminary filling circuit includes by charge power supply 11, precharge electricity
Hinder the circuit of Rp, preliminary filling contactor Kp and 14 composition of load.The guard method of the pre-charge resistance of the present embodiment includes following step
It is rapid:
S1, when preliminary filling circuit turn-on time reaches the preset charged stage, judge it is described load 14 both ends charging
Whether voltage meets and charging requirement corresponding to the preset charged stage.
If S2, not meeting charging requirement corresponding to the preset charged stage, the preliminary filling contactor is disconnected, and defeated
Abnormal alarm signal corresponding with the preset charged stage out.
Wherein, the entire charging process in the preliminary filling circuit is divided into several preset charged ranks according to charging time length
Section, each preset charged stage are provided with corresponding charging requirement and abnormal alarm mode.
Due to after the conducting of preliminary filling circuit, when the preliminary filling duration reaches preset time, if preliminary filling circuit occur it is abnormal,
For example situations such as short circuit, the resistance value for loading 14 are substantially reduced (being 0 when short-circuit), and electrical equipment both ends when preliminary filling is caused to load 14 electricity
Pressure can not be increased to normal working voltage when normal pre-charge electricity always, that is, it is small that 14 both end voltages are loaded when charge circuit failure
The normal working voltage of load 14 when charge circuit charges normal, therefore can be by within a certain period of time, comparing load 14
The charging voltage at both ends and the size of voltage threshold, judge whether preliminary filling circuit breaks down, and then timely when occurring abnormal
It disconnects preliminary filling circuit and exports preset alarm signal.
The guard method of the pre-charge resistance of above-described embodiment can faster identify preliminary filling loop fault by grading forewarning system,
Preservation tactics are taken in time, effectively improve the safety in preliminary filling circuit.
The embodiment of the present invention is divided into first by taking four preset charged stages as an example, by the charging time of entire charging process
Preset charged stage, the second preset charged stage, third preset charged stage and the 4th preset charged stage, each preset charged
The preliminary filling circuit turn-on time in stage be respectively the first preset time t 1, the second preset time t 2, third preset time t 3 and
T4 the time required to presupposition theory charging complete.Correspondingly, corresponding voltage threshold can be calculated according to each preset time to judge
Whether exception, voltage threshold (the i.e. V are occurredt) it include first voltage threshold value, second voltage threshold value, tertiary voltage threshold value and
Four voltage thresholds.Voltage threshold can be calculated by following calculating formula (1) in charging requirement corresponding to each preset charged stage
It obtains:
Wherein, R is the resistance value of the equivalent resistance of the load, and C is the capacitance of the equivalent capacity of the load, VtFor
The voltage value at 14 both ends of the load, V when t momentuFor the voltage value at 14 both ends of the load after charging complete, V0For load 14
The initial voltage value at both ends.
Specifically, reached for the first preset charged stage in the duration that preliminary filling circuit carries out high pressure preliminary filling:
Step S1 includes when turn-on time reached for the first preset charged stage in the preliminary filling circuit, judging the load
Whether the charging voltage at 14 both ends is less than first voltage threshold value；Wherein, when the preliminary filling circuit, to reach first default for turn-on time
It is judged as when time t1 and reaches the first preset charged stage, t1 > 0.It is greater than or equal in the charging voltage for loading 14 both ends
When first voltage threshold value, then it is assumed that preliminary filling circuit works normally, and continues as 14 charging of load.
Step S2 includes, if charging voltage when preliminary filling circuit turn-on time reaches the first preset time t 1 is less than described the
One voltage threshold does not meet the charging requirement in the first preset charged stage then, disconnects the preliminary filling contactor at this time, and defeated
Level-one abnormal alarm signal out.
Further, reached for the second preset charged stage in the duration that preliminary filling circuit carries out high pressure preliminary filling:
Step S1 includes, if the duration of high pressure preliminary filling reached for the first preset charged stage, the charging voltage is big
In or equal to the first voltage threshold value, then when in the preliminary filling circuit, turn-on time reached for the second preset charged stage, judge
Whether the charging voltage at 14 both ends of the load is less than second voltage threshold value；Wherein, when the preliminary filling circuit, turn-on time reaches
It is judged as when the second preset time t 2 and reaches the second preset charged stage, t2 > t1 > 0.In the charging voltage for loading 14 both ends
When more than or equal to second voltage threshold value, then it is assumed that preliminary filling circuit works normally, and continues as 14 charging of load.
Step S2 includes, if charging voltage when preliminary filling circuit turn-on time reaches the second preset time t 2 is less than described the
Two voltage thresholds do not meet the charging requirement in the second preset charged stage then, disconnect the preliminary filling contactor at this time, and defeated
Second level abnormal alarm signal out.
Further, reach the third preset charged stage in the duration that preliminary filling circuit carries out high pressure preliminary filling:
Step S1 includes, if the duration of high pressure preliminary filling reached for the second preset charged stage, the charging voltage is big
In or equal to the second voltage threshold value, then when in the preliminary filling circuit, turn-on time reaches the third preset charged stage, judge
Whether the charging voltage at 14 both ends of the load is less than tertiary voltage threshold value；Wherein, when the preliminary filling circuit, turn-on time reaches
It is judged as when third preset time t 3 and reaches the third preset charged stage, t3 > t2 > t1 > 0.In the charging for loading 14 both ends
When voltage is greater than or equal to tertiary voltage threshold value, then it is assumed that preliminary filling circuit works normally, and continues as 14 charging of load.
Step S2 includes, if charging voltage when preliminary filling circuit turn-on time reaches third preset time t 3 is less than described the
Three voltage thresholds do not meet the charging requirement in the third preset charged stage then, disconnect the preliminary filling contactor at this time, and defeated
Three-level abnormal alarm signal out.
Further, reached for the 4th preset charged stage in the duration that preliminary filling circuit carries out high pressure preliminary filling:
Step S1 includes that if the duration of high pressure preliminary filling reaches the third preset charged stage, the charging voltage is big
In or equal to the tertiary voltage threshold value, then when in the preliminary filling circuit, turn-on time reached for the 4th preset charged stage, judge
Whether the charging voltage at 14 both ends of the load is less than the 4th voltage threshold；Wherein, when the preliminary filling circuit, turn-on time is greater than
It is judged as when t4 the time required to presupposition theory charging complete and reaches the 4th preset charged stage, t4 > t3 > t2 > t1 > 0.Negative
When carrying the charging voltage at 14 both ends equal to four voltage thresholds, that is, when reaching target charging voltage, the preliminary filling contactor is disconnected,
Preliminary filling circuit is to load the process that 14 charge to terminate.
Step S2 includes, if charging voltage when preliminary filling circuit turn-on time reaches four preset time ts 4 is less than described the
Four voltage thresholds do not meet the charging requirement in the 4th preset charged stage then, disconnect the preliminary filling contactor at this time, and defeated
Level Four abnormal alarm signal out.
Further, the preliminary filling circuit further includes main contactor Km, the main contactor Km with connect after precharge
Resistance Rp and preliminary filling contactor Kp are in parallel, after step S1 further include:
If the charging voltage meets charging requirement corresponding to the preset charged stage, at the load both ends
When voltage reaches target charging voltage, the preliminary filling contactor is disconnected, and be closed the main contactor.That is, indicating that load 14 is high
Pressure powers on completion.
The guard method of above-mentioned pre-charge resistance is divided into four preset charged stages according to charging time length, each pre-
If the charging stage is provided with corresponding charging requirement and abnormal alarm mode, each stage can early warning protection, relative to
Prior art only just carries out early warning protection in last detection-phase, and above-mentioned grading forewarning system scheme can faster identify that preliminary filling returns
Road failure, takes Preservation tactics in time, effectively improves the safety in preliminary filling circuit.Further, since pre-charge resistance both end voltage
Load voltage is subtracted for high-voltage DC power supply voltage, when preliminary filling circuit is broken down, load voltage is smaller, pre-charge resistance two
It holds voltage bigger, is easy to cause pre-charge resistance fever damage, and use grading forewarning system protection mechanism, can quickly protect precharge
Resistance, effectively avoiding, which prevents pre-charge resistance damage from leading to not completion load (such as motor driver) high pressure, powers on.
It should be noted that preliminary filling duration includes at least one detection-phase, can according to the performance parameter in preliminary filling circuit into
Row setting, detection-phase is more, and early warning protection class is higher.
As shown in figure 3, the embodiment of the present invention also provides a kind of protective device of pre-charge resistance, the protection of the preliminary filling resistance
Device can be used for the preliminary filling circuit of such as motor driver high-tension apparatus in electric car.The guarantor of preliminary filling resistance in the present embodiment
Protection unit includes memory 31 and processor 32, and the computer journey that can be run on processor 32 is stored in the memory 31
Sequence, and the step of when processor 32 executes above-mentioned computer program realizes the guard method of pre-charge resistance as described above.This reality
The protective device and the method in above-mentioned Fig. 2 corresponding embodiment for applying the preliminary filling resistance in example belong to same design, implement
Process is shown in corresponding embodiment of the method in detail, and the technical characteristic in embodiment of the method is corresponding suitable in this apparatus embodiments
With which is not described herein again.
The embodiment of the present invention also provides a kind of computer readable storage medium, and computer journey is stored on the storage medium
Sequence, when the computer program is executed by processor, the step of realizing the guard method of pre-charge resistance as described above.This implementation
The method in computer readable storage medium and above-mentioned Fig. 2 corresponding embodiment in example belongs to same design, implements
Journey is shown in corresponding embodiment of the method in detail, and the technical characteristic in embodiment of the method is corresponding applicable in this apparatus embodiments,
Which is not described herein again.
As shown in figure 4, the embodiment of the present invention also provides a kind of protection system of pre-charge resistance, the preliminary filling circuit includes
The circuit being made of charge power supply, pre-charge resistance, preliminary filling contactor and load, the protection system of the pre-charge resistance include
Charging voltage detection unit 41, abnormal alarm unit 42, in which:
The charging voltage detection unit 41, for when preliminary filling circuit turn-on time reaches the preset charged stage,
Judge whether the charging voltage at the load both ends meets and charging requirement corresponding to the preset charged stage.
The abnormal alarm unit 42, if the charging voltage at the load both ends does not meet the preset charged rank
When charging requirement corresponding to section, the preliminary filling contactor is disconnected, and exports abnormal report corresponding with the preset charged stage
Alert signal.
Wherein, the entire charging process in the preliminary filling circuit is divided into several preset charged ranks according to charging time length
Section, each preset charged stage are provided with corresponding charging requirement and abnormal alarm mode.
The protection system of the pre-charge resistance of the embodiment of the present invention, by using charging voltage detection unit 41, abnormal report
Alert unit 42, detects load voltage, and load voltage is compared with the predetermined voltage threshold of respective stage stage by stage, can be
Grading forewarning system is protected during preliminary filling, can quickly identify the exception in preliminary filling circuit, is disconnected in time when an abnormal situation occurs pre-
It fills circuit and exports, protect pre-charge resistance, prevent pre-charge resistance damage from leading to not completion load high pressure and power on, improve
The safety in preliminary filling circuit.
The preferable specific embodiment of the above, the only embodiment of the present invention, but the protection scope of the embodiment of the present invention
It is not limited thereto, anyone skilled in the art, can be light in the technical scope that the embodiment of the present invention discloses
The change or replacement being readily conceivable that should all be covered within the protection scope of the embodiment of the present invention.Therefore, the guarantor of the embodiment of the present invention
Shield range should be subject to the protection scope in claims.
Claims (10)
1. a kind of guard method of pre-charge resistance, applied to the preliminary filling circuit that high pressure powers on, the preliminary filling circuit includes by filling
The circuit that power supply, pre-charge resistance, preliminary filling contactor and load are constituted, which is characterized in that the protection of the pre-charge resistance
Method includes:
When turn-on time reaches the preset charged stage in the preliminary filling circuit, judge whether the charging voltage at the load both ends accords with
It closes and charging requirement corresponding to the preset charged stage；
If not meeting charging requirement corresponding to the preset charged stage, the preliminary filling contactor, and output and institute are disconnected
State preset charged stage corresponding abnormal alarm signal；
Wherein, the entire charging process in the preliminary filling circuit is divided into several preset chargeds stage according to charging time length,
Each preset charged stage is provided with corresponding charging requirement and abnormal alarm mode.
2. the guard method of pre-charge resistance as described in claim 1, which is characterized in that in preliminary filling circuit turn-on time
When reaching the preset charged stage, judge it is described load both ends charging voltage whether meet with corresponding to the preset charged stage
Charging requirement include:
When turn-on time reached for the first preset charged stage in the preliminary filling circuit, judge that the charging voltage at the load both ends is
It is no to be less than first voltage threshold value；Wherein, it is judged as when turn-on time reaches the first preset time t 1 when the preliminary filling circuit and reaches
The first preset charged stage, t1 > 0；
If described do not meet charging requirement corresponding to the preset charged stage, the preliminary filling contactor is disconnected, and export
Abnormal alarm signal corresponding with the preset charged stage includes:
If the charging voltage is less than the first voltage threshold value, the charging for not meeting the first preset charged stage is wanted
It asks, disconnects the preliminary filling contactor at this time, and export level-one abnormal alarm signal.
3. the guard method of pre-charge resistance as claimed in claim 2, which is characterized in that in preliminary filling circuit turn-on time
When reaching for the first preset charged stage, judge also to wrap after whether the charging voltage at the load both ends is less than first voltage threshold value
It includes:
If the charging voltage is greater than or equal to the first voltage threshold value, in the preliminary filling circuit, turn-on time reaches second
When the preset charged stage, judge whether the charging voltage at the load both ends is less than second voltage threshold value；Wherein, when the preliminary filling
Circuit turn-on time is judged as when reaching the second preset time t 2 reaches the second preset charged stage, t2 > t1 > 0；
If the charging voltage is less than the second voltage threshold value, the charging for not meeting the second preset charged stage is wanted
It asks, disconnects the preliminary filling contactor at this time, and export second level abnormal alarm signal.
4. the guard method of pre-charge resistance as claimed in claim 3, which is characterized in that in preliminary filling circuit turn-on time
When reaching for the second preset charged stage, judge also to wrap after whether the charging voltage at the load both ends is less than second voltage threshold value
It includes:
If the charging voltage is greater than or equal to the second voltage threshold value, in the preliminary filling circuit, turn-on time reaches third
When the preset charged stage, judge whether the charging voltage at the load both ends is less than tertiary voltage threshold value；Wherein, when the preliminary filling
Circuit turn-on time is judged as when reaching third preset time t 3 reaches the third preset charged stage, t3 > t2 > t1 > 0；
If the charging voltage is less than the tertiary voltage threshold value, the charging for not meeting the third preset charged stage is wanted
It asks, disconnects the preliminary filling contactor at this time, and export three-level abnormal alarm signal.
5. the guard method of pre-charge resistance as claimed in claim 4, which is characterized in that in preliminary filling circuit turn-on time
When reaching the third preset charged stage, judge also to wrap after whether the charging voltage at the load both ends is less than tertiary voltage threshold value
It includes:
If the charging voltage is greater than or equal to the tertiary voltage threshold value, in the preliminary filling circuit, turn-on time reaches the 4th
When the preset charged stage, judge the charging voltage at the load both ends whether less than the 4th voltage threshold；Wherein, when the preliminary filling
It is judged as when t4 the time required to circuit turn-on time is greater than presupposition theory charging complete and reaches the 4th preset charged stage, t4
>t3>t2>t1>0；
If the charging voltage is less than the 4th voltage threshold, the charging for not meeting the 4th preset charged stage is wanted
It asks, disconnects the preliminary filling contactor at this time, and export level Four abnormal alarm signal.
6. such as the guard method of the described in any item pre-charge resistances of claim 2~5, which is characterized in that each preset charged
The calculation of voltage threshold is as follows in charging requirement corresponding to stage:
Wherein, R is the resistance value of the equivalent resistance of the load, and C is the capacitance of the equivalent capacity of the load, VtFor t moment
Shi Suoshu loads the voltage value at both ends, VuFor the voltage value at load described after charging complete both ends, V0For the initial electricity for loading both ends
Pressure value.
7. the guard method of pre-charge resistance as described in claim 1, which is characterized in that the preliminary filling circuit further includes that master connects
Tentaculum, the main contactor with connect after the pre-charge resistance and the preliminary filling contactor it is in parallel, it is described in the preliminary filling
When circuit turn-on time reaches the preset charged stage, judges whether the charging voltage at the load both ends meets and filled with described preset
After charging requirement corresponding to the electric stage further include:
The voltage if charging voltage meets charging requirement corresponding to the preset charged stage, at the load both ends
When reaching target charging voltage, the preliminary filling contactor is disconnected, and be closed the main contactor.
8. a kind of protection system of pre-charge resistance, applied to the preliminary filling circuit that high pressure powers on, the preliminary filling circuit includes by filling
The circuit that power supply, pre-charge resistance, preliminary filling contactor and load are constituted, the protection system of the pre-charge resistance include:
Charging voltage detection unit, it is described negative for judging when preliminary filling circuit turn-on time reaches the preset charged stage
Whether the charging voltage for carrying both ends meets and charging requirement corresponding to the preset charged stage；
Abnormal alarm unit does not meet for the charging voltage at the load both ends and fills corresponding to the preset charged stage
When electricity requires, the preliminary filling contactor is disconnected, and export abnormal alarm signal corresponding with the preset charged stage；
Wherein, the entire charging process in the preliminary filling circuit is divided into several preset chargeds stage according to charging time length,
Each preset charged stage is provided with corresponding charging requirement and abnormal alarm mode.
9. a kind of protective device of pre-charge resistance, which is characterized in that deposited including memory and processor, and in the memory
The computer program that can be run in the processor is contained, the processor executes the computer program and realizes such as claim
The step of guard method of pre-charge resistance described in any one of 1 to 7.
10. a kind of computer readable storage medium, which is characterized in that be stored with computer on the computer readable storage medium
Program, when the computer program is executed by processor, realizing the pre-charge resistance as described in any one of claims 1 to 7
The step of guard method.
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Address after: 215000 52 tianedang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: Suzhou Huichuan United Power System Co.,Ltd. Address before: 215000 52 tianedang Road, Yuexi Town, Wuzhong District, Suzhou City, Jiangsu Province Patentee before: SUZHOU HUICHUAN UNITED POWER SYSTEM Co.,Ltd. |