CN109831159A - A kind of method for diagnosing faults of sequence switch parallel regulator - Google Patents
A kind of method for diagnosing faults of sequence switch parallel regulator Download PDFInfo
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- CN109831159A CN109831159A CN201910082516.8A CN201910082516A CN109831159A CN 109831159 A CN109831159 A CN 109831159A CN 201910082516 A CN201910082516 A CN 201910082516A CN 109831159 A CN109831159 A CN 109831159A
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The present invention provides a kind of method for diagnosing faults of sequence switch parallel regulator comprising following steps: analyzing the working condition under sequence switch parallel regulator non-failure conditions；Analysis obtains the fault mode of sequence switch parallel regulator；Choosing test point is every corresponding solar cell submatrix voltage of shunt regulating circuit all the way, and chooses sample frequency；Sampling data time length is chosen, and covers the complete switching cycle of solar cell submatrix voltage；The corresponding solar cell submatrix voltage of circuit is adjusted to each level shunt to sample；Find adjustment grade；According to the adjustment grade searched out, fault diagnosis is carried out；It returns and continues next round sampling and diagnosis.Using technical solution of the present invention, increases detection limit solar cell submatrix voltage in the shunt regulating circuit of the road Zhi Xumei, accurately can be detected and be positioned, method is simple；Fault detection rate is high, it can be achieved that failure is accurately positioned, and diagnosis speed is fast, and increased detection limit is few.
Description
Technical field
The present invention relates to spacecraft power supply controller failure diagnostic field more particularly to a kind of sequence switch parallel regulators
Method for diagnosing faults.
Background technique
Parallel regulator is widely used in spacecraft power supply controller to come to solar battery array output power and busbar voltage
It is adjusted.From the angle of energy transmission, the topological structure of spacecraft power supply system can be divided into DIRECT ENERGY transfer mode (DET)
With peak power tracking mode.Parallel regulator is usually applied to DET topology as shown in Figure 1.
The sequence switch shunt regulating functional block diagram of the prior art is as shown in Fig. 2, sun battle array is divided into n by parallel regulator
The anode of identical submatrix, each submatrix is grounded by switch transistor T, is connected to bus V by diode Dbus.According to switching tube
The every level shunt of different conditions adjust circuit there are three types of working conditions: shunt, power supply, adjust.Divide when shunt regulating circuit is in
When stream mode, switch transistor T closure, solar cell submatrix output shunts over the ground；When parallel regulator is in power supply state, switch
Pipe T is disconnected, and the output of solar cell submatrix all supplies bus；When parallel regulator is in adjustment state, switch transistor T is according to control
Be closed when logic processed, when and disconnect, shunt when solar cell submatrix and over the ground, when and to bussed supply.All shunt circuits
It is controlled by same bus error amplification signal (MEA), is controlled by controlling and driving circuits switch tube T.
Spacecraft power supply controller does not consider the fault diagnosis of parallel regulator usually in design, passes through MEA electricity at present
Pressure to carry out the failure of shunt regulating circuit fault diagnosis, but can not carry out accurate detection and positioning to failure.This be by
There is multichannel in shunt regulating circuit, forms mutual redundancy backup to a certain extent.When wherein shunt regulating circuit is sent out all the way
After raw failure, if conditions permit, adjacent shunt regulating circuit can replace faulty circuit to work, and cause through MEA voltage
The shunt regulating circuit to break down cannot be accurately positioned.
Summary of the invention
Against the above technical problems, the invention discloses a kind of method for diagnosing faults of sequence switch parallel regulator, solutions
The problem of certainly current method for diagnosing faults accurately can not be detected and be positioned to parallel regulator failure, shorten fault detection and
Positioning time improves fault detection and positioning accuracy.
In this regard, the technical solution of the present invention is as follows:
A kind of method for diagnosing faults of sequence switch parallel regulator comprising following steps:
Step S1 analyzes the working condition under sequence switch parallel regulator non-failure conditions；
Step S2, according to the content of step S1, analysis obtains the fault mode of sequence switch parallel regulator；
Step S3, choosing test point is every corresponding solar cell submatrix voltage of shunt regulating circuit all the way, and chooses sampling frequency
Rate；
Step S4 chooses sampling data time length, and covers the complete switching cycle of solar cell submatrix voltage；
Step S5 adjusts the corresponding solar cell submatrix voltage of circuit to each level shunt and samples；
Step S6 finds adjustment grade；
Wherein in sampled data length, all solar cell submatrix voltages are detected, if solar cell submatrix voltage is same
When exist for 0 and the case where for busbar voltage, then corresponding shunt regulating circuit is adjustment grade；
Step S7 compares the fault mode of step S2 according to the adjustment grade searched out, carries out fault diagnosis；
Step S8, return step S5 continue next round sampling and diagnosis.
It adopts this technical solution, increases detection limit solar cell submatrix voltage in the shunt regulating circuit of the road Zhi Xumei, just
Parallel regulator failure accurately can be detected and be positioned.This method does not influence parallel regulator normal work, can be to which
The single fault or multiple faults that road parallel regulator occurs are accurately positioned, and can pass through telemetering number for on-orbit fault diagnosis or ground
Help is provided according to fault diagnosis is carried out.
As a further improvement of the present invention, in step S6, the method for adjusting grade is found are as follows: selected threshold voltage, when too
Positive electricity pond battle array voltage is then considered as within the entire sampling time while the case where appearance is greater than threshold voltage and less than threshold voltage
Find adjustment grade.
As a further improvement of the present invention, the threshold voltage is the half of busbar voltage.
As a further improvement of the present invention, step S7, fault diagnosis include:
If searching out 1 adjustment grade, be set as kth grade, wherein k is integer more than or equal to 1, if the 1st grade to -1 level shunt tune of kth
Economize on electricity the corresponding solar cell submatrix voltage in road if more than or be equal to threshold voltage, then normal power supply trouble occurs；+ 1 grade to of kth
If 12 level shunts adjust circuit and correspond to solar cell submatrix voltage less than or equal to threshold voltage, occur often to shunt failure.
As a further improvement of the present invention, step S7, fault diagnosis include:
If searching out 2 adjustment grades, if 2 adjustment grades are k1 and k2, k1, k2 and its between shunt circuit be adjustment band, the
1 grade to kth 1-1 level shunt adjust the corresponding solar cell submatrix voltage of circuit if more than or be equal to threshold voltage, then occur normal
Power supply trouble；If 2+1 grades of kth adjust the corresponding solar cell submatrix voltage of circuit to the 12nd level shunt and are less than or equal to threshold value electricity
Pressure then occurs often to shunt failure.
If 2 adjustment grades are connected, no intergrade；
If 2 adjustment grades are not attached to, there are 1 grade or multistage intergrade among 2 adjustment grades, if the corresponding solar cell of intergrade
Submatrix voltage is less than threshold voltage, then intergrade occurs often to shunt failure；If the corresponding solar cell submatrix voltage of intergrade is big
In threshold voltage, then normal power supply trouble occurs for intergrade.
As a further improvement of the present invention, sample frequency is at least 2 times of solar cell submatrix voltage highest frequency.
As a further improvement of the present invention, sample frequency is at least 10kHz.
As a further improvement of the present invention, sampling data time length is 10ms.
Compared with prior art, the invention has the benefit that
First, using technical solution of the present invention, increase detection limit solar cell submatrix in the shunt regulating circuit of the road Zhi Xumei
Voltage accurately can be detected and be positioned to parallel regulator failure, and method is simple；Pass through the solar cell upper frequency
Submatrix voltage as detection limit, can be detected duty ratio very little or it is very big when adjustment grade, to can reach very high failure inspection
Survey rate, failure omission factor is low, and fault detection rate is high.
Second, using technical solution of the present invention, it can be achieved that failure is accurately positioned, which parallel regulator can be occurred
Single fault or multiple faults be accurately positioned, for on-orbit fault diagnosis or ground by telemetry progress fault diagnosis provide
It helps.
Third, using technical solution of the present invention, diagnosis speed is fast, is consequent malfunction in ms rank the time required to diagnosis
The quality time has been won in processing.
4th, increased detection limit is few.Each fraction current circuit only increases a detection limit --- solar cell submatrix electricity
Pressure.The increased detection limit can be used to calculate the efficiency of each fraction current circuit simultaneously；And do not influence parallel regulator just
Often work, for increased detection limit on former shunt circuit substantially without influence, it is normal that simultaneous faults does not influence parallel regulator when diagnosing
Work.
Detailed description of the invention
Fig. 1 is the topological schematic diagram of DIRECT ENERGY transfer mode (DET) of the sequence switch parallel regulator of the prior art.
Fig. 2 is the sequence switch shunt regulating functional block diagram of the prior art；
Fig. 3 is the functional block diagram for the sequence switch parallel regulator that circuit is adjusted with n level shunt that the embodiment of the present invention is directed to.
Fig. 4 is the flow chart of sequence switch parallel regulator (S3R) method for diagnosing faults of the invention.
Fig. 5 is corresponding 8 voltage of sun submatrix of certain direct fault location test adjustment grade of the embodiment of the present invention in 0 and bus
Switching waveform figure near voltage.
Fig. 6 is that certain direct fault location testing failure of the embodiment of the present invention shunts corresponding 6 voltage of solar cell submatrix of grade
Waveform diagram.
6 voltage oscillogram of operating condition solar cell submatrix when Fig. 7 is the fault-free of the embodiment of the present invention.
Specific embodiment
Referring to figure and present invention is further described in detail in conjunction with the embodiments, so that those skilled in the art can
To better understand the present invention and can be practiced, but illustrated embodiment is not as the limitation of the invention.
Sequence switch parallel regulator method for diagnosing faults is described in detail below, the sequence switch of the present embodiment shunts
The structure of adjuster is as shown in Figure 3.
If certain satellite power supply adjusts solar battery array output power and busbar voltage using sequence switch parallel regulator,
Share 12 level shunts and adjust circuit, shunted wherein the 1st level shunt adjusts circuit prior, be then successively the 2nd grade, 3rd level ...,
12nd grade, bus topology, the constant V of busbar voltage are adjusted using completebus=100V。
Fault diagnosis is carried out to the sequence switch parallel regulator using method of the invention, flow chart is as shown in figure 4, packet
Include following steps:
Step S1 analyzes the working condition under sequence switch parallel regulator (S3R) non-failure conditions.
When sequence switch parallel regulator works normally, usually only level-one shunt circuit is in switch-mode regulation state,
Its series shunt regulating circuit otherwise in SHUNT state or be in power supply state.But it when double section effects occur, has adjacent
Two-stage shunting adjust circuit and be in switch-mode regulation state, other series shunt circuits or in SHUNT state or in shape of powering
State.By being adjusted it is found that at most there is two-stage shunting to adjust circuit in switch to sequence switch parallel regulator principle Analysis
Nodular state.
Step S2, failure mode analysis (FMA).
By analysis, the fault mode of sequence switch parallel regulator includes often shunting failure and normal power supply trouble.When point
When single fault occurs for throttle regulator, have all the way shunt circuit break down, it may occur however that often shunt failure or normal power supply trouble.When
When multiple faults occurs for parallel regulator, there are two-way or multichannel shunt regulating circuit malfunctions, may there is two-way or multichannel to shunt
It is normal with shunting failure often, often shunting faulty component shunt circuit with power supply trouble or part shunt circuit often to adjust circuit
Power supply trouble.In addition when failure occurs, even if equally at most thering is two-stage shunting to adjust circuit in view of double Duan Xiaoying and being in switch
Adjustment state, only this two-stage shunting adjusts circuit and may be separated by faulty circuit and no longer adjacent when failure.
Step S3, choosing test point is per the corresponding solar cell submatrix voltage of shunt regulating circuit all the way, solar cell
Submatrix voltage highest switching frequency is 5kHz, and selection sample frequency is 20kHz.
Step S4, selection sampled data length are 10ms, it is ensured that shunt regulating circuit switch switching frequency covers when lower
Lid complete cycle.
Step S5 adjusts the corresponding solar cell submatrix voltage of circuit to each level shunt and samples.
Step S6 finds adjustment grade (the shunting grade in switch state).
The method for finding adjustment grade are as follows: all solar cell submatrix voltages are detected in sampled data length, if
It is 0 and the case where be busbar voltage (100V) that solar cell submatrix voltage, which exists simultaneously, then corresponding shunt regulating circuit is to adjust
Whole grade.Selected threshold voltage be busbar voltage half, that is, 50V, when solar cell submatrix voltage within the entire sampling time simultaneously
Occur being greater than threshold voltage (50V) and being then considered as the case where being less than threshold voltage (50V) finding adjustment grade.
Step S7 carries out fault diagnosis according to the adjustment grade found:
(1) it if searching out 1 adjustment grade, is set as kth grade (k is the integer more than or equal to 1), then the 1st grade to -1 level shunt tune of kth
Economize on electricity road all should be at SHUNT state (corresponding solar cell submatrix voltage should be less than threshold voltage), often power supply otherwise occurs therefore
Barrier；+ 1 grade of kth to the 12nd level shunt adjusts circuit and all should be at power supply state (corresponding solar cell submatrix voltage should be greater than threshold value
Voltage), otherwise occur often to shunt failure.
(2) if searching out 2 adjustment grades (at this time shunt circuit occur double Duan Xiaoying), if 2 adjustment grades are k1, k2(k1,
K2 is integer more than or equal to 1, and k2 > k1), then k1, k2 and its between shunt circuit be considered as adjustment band, then the 1st grade to the
K1-1 level shunt, which adjusts circuit, all should be at SHUNT state (corresponding solar cell submatrix voltage should be less than threshold voltage), otherwise send out
Raw normal power supply trouble；2+1 grades of kth adjust circuit to the 12nd level shunt and should be at power supply state (corresponding solar cell submatrix voltage
Should be greater than threshold voltage), otherwise occur often to shunt failure.
1. if 2 adjustment grades are connected, no intergrade；
2. having 1 grade or multistage intergrade among 2 adjustment grades, if intergrade corresponds to solar cell if 2 adjustment grades are not attached to
Submatrix voltage is less than threshold voltage, then intergrade occurs often to shunt failure；If intergrade corresponds to solar cell, submatrix voltage is greater than
Threshold voltage, then normal power supply trouble occurs for intergrade.
Step S5, return step S5 continue next round sampling and diagnosis.
Through testing, failure is injected at random in different shunting grades, method of the present invention can be detected correctly accordingly
Fault mode, and fault location can be shunted grade to specific, the average detected time used is 20ms, fault detection rate
100%, Percent Isolated 100%, failure false alarm rate 0%.
In test, the test of certain direct fault location adjusts the normal power supply trouble of circuit injection in the 6th level shunt.The operating condition is without reason
1-6 level shunt adjusts circuit and shunts when barrier, the power supply of 8-12 shunt regulating circuit, and the 7th fraction current circuit is adjustment grade；?
After 6 fraction current circuits inject normal power supply trouble, the 6th fraction current circuit is often powered, the 6th fraction galvanic electricity of the 7th level shunt circuitry instead
Road is shunted, and adjustment grade is the 8th grade.Method according to the present invention, discovery adjustment grade is the 8th grade when test, such as Fig. 5 institute
Show, 8 voltage of sun submatrix switches near 0 and busbar voltage, then should shunt for the 1st grade to the 7th fraction current circuit, corresponding sun electricity
Pond battle array voltage should be near 0；9th grade should power to the 12nd fraction current circuit, and corresponding solar cell submatrix voltage should be in bus
Near voltage.6 voltage of solar cell submatrix is found when test near busbar voltage, as shown in fig. 6, therefore the 6th fraction galvanic electricity
Normal power supply trouble occurs for road.The 6th fraction current circuit of operating condition is in SHUNT state when fault-free, and 6 voltage of solar cell submatrix is 0
Near, as shown in Figure 7.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (8)
1. a kind of method for diagnosing faults of sequence switch parallel regulator, it is characterised in that: itself the following steps are included:
Step S1 analyzes the working condition under sequence switch parallel regulator non-failure conditions；
Step S2, according to the content of step S1, analysis obtains the fault mode of sequence switch parallel regulator；
Step S3, choosing test point is every corresponding solar cell submatrix voltage of shunt regulating circuit all the way, and chooses sampling frequency
Rate；
Step S4 chooses sampling data time length, and covers the complete switching cycle of solar cell submatrix voltage；
Step S5 adjusts the corresponding solar cell submatrix voltage of circuit to each level shunt and samples；
Step S6 finds adjustment grade；
Step S7 compares the fault mode of step S2 according to the adjustment grade searched out, carries out fault diagnosis；
Step S8, return step S5 continue next round sampling and diagnosis.
2. the method for diagnosing faults of sequence switch parallel regulator according to claim 1, it is characterised in that: step S6
In, find the method for adjusting grade are as follows: selected threshold voltage, when solar cell submatrix voltage occurs simultaneously within the entire sampling time
The case where greater than threshold voltage and less than threshold voltage, which is then considered as, finds adjustment grade.
3. the method for diagnosing faults of sequence switch parallel regulator according to claim 2, it is characterised in that: the threshold value
Voltage is the half of busbar voltage.
4. the method for diagnosing faults of sequence switch parallel regulator according to claim 2, it is characterised in that: step S7,
Fault diagnosis includes:
If searching out 1 adjustment grade, be set as kth grade, wherein k is integer more than or equal to 1, if the 1st grade to -1 level shunt tune of kth
Economize on electricity the corresponding solar cell submatrix voltage in road if more than or be equal to threshold voltage, then normal power supply trouble occurs；+ 1 grade to of kth
If 12 level shunts adjust circuit and correspond to solar cell submatrix voltage less than or equal to threshold voltage, occur often to shunt failure.
5. the method for diagnosing faults of sequence switch parallel regulator according to claim 4, it is characterised in that: step S7,
Fault diagnosis includes:
If searching out 2 adjustment grades, if 2 adjustment grades are k1 and k2, k1, k2 and its between shunt circuit be adjustment band, the
1 grade to kth 1-1 level shunt adjust the corresponding solar cell submatrix voltage of circuit if more than or be equal to threshold voltage, then occur normal
Power supply trouble；If 2+1 grades of kth adjust the corresponding solar cell submatrix voltage of circuit to the 12nd level shunt and are less than or equal to threshold value electricity
Pressure then occurs often to shunt failure；
If 2 adjustment grades are connected, no intergrade；
If 2 adjustment grades are not attached to, there are 1 grade or multistage intergrade among 2 adjustment grades, if the corresponding solar cell of intergrade
Submatrix voltage is less than threshold voltage, then intergrade occurs often to shunt failure；If the corresponding solar cell submatrix voltage of intergrade is big
In threshold voltage, then normal power supply trouble occurs for intergrade.
6. the method for diagnosing faults of S4R tandem type sequence switch parallel regulator described in any one according to claim 1 ~ 5,
It is characterized by: sample frequency is at least 2 times of solar cell submatrix voltage highest frequency.
7. the method for diagnosing faults of S4R tandem type sequence switch parallel regulator according to claim 6, feature exist
In: sample frequency is at least 10kHz.
8. the method for diagnosing faults of S4R tandem type sequence switch parallel regulator described in any one according to claim 1 ~ 5,
It is characterized by: sampling data time length is 10ms.
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| CN201910082516.8A CN109831159B (en) | 2019-01-28 | 2019-01-28 | Fault diagnosis method for sequential switch shunt regulator |
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| CN112993924A (en) * | 2021-03-16 | 2021-06-18 | 上海卫星工程研究所 | Power supply sequence analysis-based satellite power supply shunt anomaly detection method and system |
| CN113253126A (en) * | 2021-04-29 | 2021-08-13 | 南方电网调峰调频发电有限公司 | Method for selecting voltage and current sampling frequency and filtering time window of battery management system |
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| CN113253126A (en) * | 2021-04-29 | 2021-08-13 | 南方电网调峰调频发电有限公司 | Method for selecting voltage and current sampling frequency and filtering time window of battery management system |
| CN113253126B (en) * | 2021-04-29 | 2022-04-26 | 南方电网调峰调频发电有限公司 | Method for selecting voltage and current sampling frequency and filtering time window of battery management system |
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