CN108562818A - A kind of zero line break detection method, device and the UPS of UPS - Google Patents
A kind of zero line break detection method, device and the UPS of UPS Download PDFInfo
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- CN108562818A CN108562818A CN201711396391.3A CN201711396391A CN108562818A CN 108562818 A CN108562818 A CN 108562818A CN 201711396391 A CN201711396391 A CN 201711396391A CN 108562818 A CN108562818 A CN 108562818A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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Abstract
The invention discloses zero line break detection method, device and the UPS of a kind of UPS, wherein this method includes：Detect the voltage difference between the phase voltage value and positive direct-current busbar and negative DC bus of three phase mains input；Judge voltage difference whether within the scope of the calculated value of pre-set zero line break；If it is, determining that open circuit occurs for zero curve；Wherein, calculated value range is determined according to the type and phase voltage value of rectification module in UPS.It can be seen that this method can be realized based on the controller of UPS itself, compared with the existing technology for the middle mode for increasing hardware, this method is without increasing hardware, and cost is relatively low, and this method calculating logic is simple, less for the own resource consumption of controller.In addition, the zero line break detection device and UPS of a kind of UPS equally have above-mentioned advantageous effect.
Description
Technical field
The present invention relates to power electronics field, more particularly to the zero line break detection method of UPS a kind of, device and
UPS。
Background technology
UPS is the important power supply apparatus of power electronics industry, coordinates the uninterrupted power supply realized to load with bypass supply.
Fig. 1 is a kind of main topology diagram for three-phase UPS that the prior art provides.As shown in Figure 1, three-phase UPS includes mainly rectification mould
Block 10, electrolytic capacitor module 11 and inverter module 12.Positive and negative direct current is obtained after rectified 10 rectifications of module of three-phase alternating current L1-L3
Direct current on DC bus is converted to exchange electricity output by busbar voltage, inverter circuit 12 again, wherein inverter module 12 it is defeated
Enter output zero curve N altogether.
In application process, when the input zero curve N open circuits of inverter module 12, the controller needs of UPS detect in time
Failure simultaneously takes corresponding measure, serious consequence caused by prevent 12 output voltage of inverter module uneven.At present to inversion
The detection method of the input zero line break of module 12 is generally by installation one on the input zero curve cable inside three-phase UPS
Current transformer is judged by current transformer to detect neutral line current size, but the method needs additional electric current
Mutual inductor, cost are higher.
It can be seen that when whether the input zero curve for detecting inverter module is breaking, how to reduce testing cost is this field
Technical staff's urgent problem to be solved.
Invention content
The object of the present invention is to provide the zero line break detection methods of UPS a kind of, for the input in detection inverter module
When whether zero curve is breaking, testing cost is reduced.In addition, the present invention also provides a kind of zero line break detection device and UPS.
In order to solve the above technical problems, the present invention provides a kind of zero line break detection method of UPS, this method includes：
Detect the voltage difference between the phase voltage value and positive direct-current busbar and negative DC bus of three phase mains input；
Judge the voltage difference whether within the scope of the calculated value of pre-set zero line break；
If it is, determining that open circuit occurs for zero curve；
Wherein, the calculated value range is determined according to the type of rectification module in UPS and the phase voltage value.
Preferably, the rectification module is specially three-phase uncontrollable rectifier module, then corresponding, the calculated value range
Specially
Wherein, the phase voltage value is the phase voltage value of the three phase mains any one, UiFor the phase voltage value,
UerrFor pre-set allowable range of error.
Preferably, the rectification module is specially three-phase fully-controlled rectification module, then corresponding, the calculated value range
Specially [2.34cos α * Ui-Uerr, 2.34cos α * Ui+Uerr]；
Wherein, the phase voltage value is the phase voltage value of the three phase mains any one, UiFor the phase voltage value,
UerrFor pre-set allowable range of error, α is the Trigger Angle of thyristor.
Preferably, if the voltage difference is not within the scope of the calculated value, further include：
Judge the voltage difference whetherIn range；
If it is, determining that the zero curve is normal, the rectification module failure is otherwise determined.
Preferably, further include：
Corresponding prompt messages are exported according to judging result.
In order to solve the above technical problems, the present invention also provides the zero line break detection device of UPS a kind of, which includes：
Detection unit, for detect three phase mains input phase voltage value and positive direct-current busbar and negative DC bus between
Voltage difference；
First judging unit, for judge the voltage difference whether pre-set zero line break calculated value
In range；
Determination unit is when being for the result in first judging unit, it is determined that zero curve generation open circuit；
Wherein, the calculated value range is determined according to the type of rectification module in UPS and the phase voltage value.
Preferably, the rectification module is specially three-phase uncontrollable rectifier module, then corresponding, the calculated value range
Specially
Wherein, the phase voltage value is the phase voltage value of the three phase mains any one, UiFor the phase voltage value,
UerrFor pre-set allowable range of error.
Preferably, the rectification module is specially three-phase fully-controlled rectification module, then corresponding, the calculated value range
Specially [2.34cos α * Ui-Uerr, 2.34cos α * Ui+Uerr]；
Wherein, the phase voltage value is the phase voltage value of the three phase mains any one, UiFor the phase voltage value,
UerrFor pre-set allowable range of error, α is the Trigger Angle of thyristor.
Preferably, if the judging result of first judging unit is no, further include：
Second judgment unit, for judge the voltage difference whetherRange
It is interior；
The determination unit is additionally operable to when the judging result of the second judgment unit is to be, it is determined that the zero curve is just
Often, the rectification module failure is otherwise determined.
In order to solve the above technical problems, the present invention also provides a kind of UPS, including memory, for storing computer program；
Controller realizes the zero line break detection method of UPS as described above when for executing the computer program
The step of.
The zero line break detection method of UPS provided by the present invention, this method include：Detect the phase electricity of three phase mains input
Voltage difference between pressure value and positive direct-current busbar and negative DC bus；Judge voltage difference whether in pre-set zero curve
Within the scope of the calculated value of open circuit；If it is, determining that open circuit occurs for zero curve；Wherein, calculated value range is according in UPS
The type and phase voltage value of rectification module determine.It can be seen that this method can be realized based on the controller of UPS itself, phase
For increasing the mode of hardware in the prior art, this method is without increasing hardware, and cost is relatively low, and this method calculating logic
Simply, the own resource of controller is consumed less.
It is and above-mentioned in addition, the present invention also provides zero line break detection device, UPS and the computer storage media of a kind of UPS
The zero line break detection method of UPS corresponds to, and equally has above-mentioned advantageous effect.
Description of the drawings
In order to illustrate the embodiments of the present invention more clearly, attached drawing needed in the embodiment will be done simply below
It introduces, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ordinary skill people
For member, without creative efforts, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of main topology diagram for three-phase UPS that the prior art provides；
Fig. 2 is a kind of flow chart of the zero line break detection method of UPS provided in an embodiment of the present invention；
Fig. 3 is the flow chart of the zero line break detection method of another kind UPS provided in an embodiment of the present invention；
Fig. 4 is a kind of structure chart of the zero line break detection device of UPS provided in an embodiment of the present invention；
Fig. 5 is the structure chart of the zero line break detection device of another kind UPS provided in an embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, without making creative work, what is obtained is every other by those of ordinary skill in the art
Embodiment belongs to the scope of the present invention.
Core of the invention is to provide a kind of zero line break detection method of UPS, for the input in detection inverter module
When whether zero curve is breaking, testing cost is reduced.In addition, the present invention also provides a kind of zero line break detection device and UPS.This method
And device can be realized by the controller of UPS itself, can also be realized by other devices, hereinafter with the control of UPS itself
Each embodiment is described for device.
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Fig. 2 is a kind of flow chart of the zero line break detection method of UPS provided in an embodiment of the present invention.As shown in Fig. 2, should
Method includes：
S10：Detect the voltage difference between the phase voltage value and positive direct-current busbar and negative DC bus of three phase mains input
Value.
It should be noted that it can be CPU or DSP as core logic that each UPS, which has the controller of itself, controller,
Control unit controls the operation of other components in UPS.In addition, controller can directly acquire the phase voltage value of three phase mains input
Voltage difference Ud between Ui and positive direct-current busbar and negative DC bus.As shown in Figure 1, Ud=| Up-Un |, Up is positive direct-current
Voltage value on busbar, Un are the voltage value on negative DC bus.
S11：Voltage difference is judged whether within the scope of the calculated value of pre-set zero line break, if it is,
Into S12.Wherein, calculated value range is determined according to the type and phase voltage value of rectification module in UPS.
For the type of different rectification modules, the calculated value range of corresponding zero line break is different, therefore,
The type previously according to rectification module is needed to determine the range of corresponding calculated value, when controller calculates voltage difference
Afterwards, whether within the scope of calculated value determine whether current zero curve breaks down by comparing voltage difference.It needs to illustrate
, the zero curve in the present invention refers to the input zero curve of inverter module, and the input and output of inverter module under normal conditions are total to zero curve.
In order to allow those skilled in the art more to understand the different corresponding calculated value ranges of rectification module, this implementation
It is three-phase uncontrollable rectifier module and the corresponding calculated value range of three-phase fully-controlled rectification module that rectification module is provided in example, can be with
Understand, both specific rectification module types are two kinds therein, and it can only be both types not represent.
1) rectification module is specially three-phase uncontrollable rectifier module, then corresponding, and calculated value range is specially
Wherein, phase voltage value is the phase voltage value of three phase mains any one, UiFor phase voltage value, UerrTo pre-set
Allowable range of error.
As shown in Figure 1, phase voltage value can be the phase voltage of any one in three phase mains, such as i=1, then UiJust
It is this corresponding phase voltage value of firewire L1；I=2, then UiIt is exactly this corresponding phase voltage value of firewire L2；I=3, then Ui
It is exactly this corresponding phase voltage value of firewire L3.In the ideal case, the corresponding calculated value of zero line break is
In view of the influence of various errors, therefore, in the present invention, on the basis of this value, one is provided with UerrFor the model of deviation
It encloses, i.e.,
UerrIt needs to be set according to actual conditions, it is to be understood that UerrSize determine the height of accuracy of detection, if
The value setting it is larger, then the precision detected is relatively low, if on the contrary, the value setting it is smaller, the precision detected is higher.Cause
This is needed depending on the requirement of the application scenarios of UPS, the present invention repeats no more in specific implementation.
2) rectification module is specially three-phase fully-controlled rectification module, then corresponding, and calculated value range is specially
[2.34cosα*Ui-Uerr, 2.34cos α * Ui+Uerr]；
Wherein, phase voltage value is the phase voltage value of three phase mains any one, UiFor phase voltage value, UerrTo pre-set
Allowable range of error, α be thyristor Trigger Angle.
The concrete structure present invention about three-phase fully-controlled rectification module repeats no more, corresponding with three-phase uncontrollable rectifier module
, phase voltage value can be the phase voltage of any one in three phase mains, such as i=1, then UiIt is exactly that this is opposite by firewire L1
The phase voltage value answered；I=2, then UiIt is exactly this corresponding phase voltage value of firewire L2；I=3, then UiIt is exactly this phase of firewire L3
Corresponding phase voltage value.In the ideal case, the corresponding calculated value of zero line break is 2.34cos α * Ui, it is contemplated that it is various
Therefore the influence of error in the present invention, on the basis of this value, is provided with one with UerrFor the range of deviation, i.e.,
[2.34cosα*Ui-Uerr, 2.34cos α * Ui+Uerr]。
UerrIt needs to be set according to actual conditions, it is to be understood that UerrSize determine the height of accuracy of detection, if
The value setting it is larger, then the precision detected is relatively low, if on the contrary, the value setting it is smaller, the precision detected is higher.Cause
This is needed depending on the requirement of the application scenarios of UPS, the present invention repeats no more in specific implementation.
It should be noted that being directed to three-phase uncontrollable rectifier module and the corresponding error of three-phase fully-controlled rectification module in the present invention
Allowable range UerrCan be identical, it can not also be identical.
In addition, in specific implementation, in order to prevent the phase voltage value of a certain phase occur it is abnormal and the phenomenon that cause erroneous judgement,
Can be the average value for the phase voltage value for calculating three-phase as U in a kind of embodimenti.In addition, controller can be periodically right
The phase voltage value of a certain stationary phase is judged, can also be judged in turn the phase voltage value of three-phase, and the present invention is no longer superfluous
It states.
S12：Determine that open circuit occurs for zero curve.
Controller is exactly whether showing for zero line break to be determined whether within the scope of calculated value according to voltage difference
As.Preferably embodiment further includes：Corresponding prompt messages are exported according to judging result.In the present embodiment, report
Alert prompt message is exactly the prompt messages that open circuit occurs for zero curve.
The zero line break detection method of UPS provided in this embodiment is realized, this method packet by the controller of UPS itself
It includes：Detect the voltage difference between the phase voltage value and positive direct-current busbar and negative DC bus of three phase mains input；Judge electricity
Whether pressure difference is within the scope of the calculated value of pre-set zero line break；If it is, determining that open circuit occurs for zero curve；Its
In, calculated value range is determined according to the type and phase voltage value of rectification module in UPS.It can be seen that this method is based on
The controller of UPS itself realizes that compared with the existing technology for the middle mode for increasing hardware, this method is not necessarily to increase hardware, at
This is relatively low, and this method calculating logic is simple, less for the own resource consumption of controller.
Fig. 3 is the flow chart of the zero line break detection method of another kind UPS provided in an embodiment of the present invention.In above-mentioned implementation
In example, whether zero can be determined within the scope of calculated value by the voltage difference between positive direct-current busbar and negative DC bus
Whether line sends open circuit.In the present embodiment, whether rectification mould can also be determined in another numberical range by voltage difference
Whether block breaks down.Specifically, when if voltage difference is not within the scope of calculated value, further include：
S20：Judge voltage difference whether within the scope of the theoretical calculation of rectification module failure；If it is, into S21,
Otherwise, into S22.Wherein, which is specially
S21：Determine that zero curve is normal.
S22：Determine rectification module failure.
As shown in Figure 1, when zero curve fault-free and rectification module are three-phase uncontrollable rectifier module, it can regard three phases as
Mutual independent full-wave rectification, specifically, illustrate by taking a phase therein as an example, for L1 this phase, in positive axis, D1 is led
Logical, C1 chargings finally reach zero curve；In negative semiaxis, D2 conductings, C2 chargings finally reach zero curve, in this process, voltage difference
The theoretical value of value isTherefore, if voltage difference exists in the present embodimentRange
It is interior, it is determined that zero curve is normal, otherwise rectification module failure.
It is understood that in the normal work of UPS, open circuit cannot be occurred by not requiring nothing more than zero curve, also require other components
Normal operation.In the present embodiment, when controller determines that open circuit does not occur for zero curve by judging result, voltage is further judged
Whether difference is in another numberical range, so as to determine whether rectification module breaks down.
Preferably embodiment further includes：Corresponding prompt messages are exported according to judging result.The present embodiment
In, prompt messages are exactly the prompt messages of rectification module failure.
Above, the embodiment of the zero line break detection method of UPS is described in detail, on this basis,
Invention additionally discloses the zero line break detection devices of UPS corresponding with this method.Embodiment due to device part and method portion
The embodiment divided corresponds, therefore the embodiment of device part refers to the description of the embodiment of method part, here wouldn't
It repeats.Fig. 4 is a kind of structure chart of the zero line break detection device of UPS provided in an embodiment of the present invention.As shown in figure 4, the dress
The controller based on UPS itself is set, including：
Detection unit 10, phase voltage value and positive direct-current busbar and negative DC bus for detecting three phase mains input it
Between voltage difference.
First judging unit 11, for judge voltage difference whether pre-set zero line break calculated value model
In enclosing.
Determination unit 12 is when being for the result in the first judging unit, it is determined that zero curve generation open circuit.
Wherein, calculated value range is determined according to the type and phase voltage value of rectification module in UPS.
Preferably embodiment, rectification module are specially three-phase uncontrollable rectifier module, then corresponding, calculated value
Range is specially
Wherein, phase voltage value is the phase voltage value of three phase mains any one, UiFor phase voltage value, UerrTo pre-set
Allowable range of error.
Preferably embodiment, rectification module are specially three-phase fully-controlled rectification module, then corresponding, calculated value
Range is specially [2.34cos α * Ui-Uerr, 2.34cos α * Ui+Uerr]；
Wherein, phase voltage value is the phase voltage value of three phase mains any one, UiFor phase voltage value, UerrTo pre-set
Allowable range of error, α be thyristor Trigger Angle.
Fig. 5 is the structure chart of the zero line break detection device of another kind UPS provided in an embodiment of the present invention.As shown in figure 5,
Preferably embodiment, if the judging result of the first judging unit 11 be it is no, further include：
Second judgment unit 13, for judge voltage difference whetherRange
It is interior；
Determination unit 12 is additionally operable to when the judging result of second judgment unit is to be, it is determined that zero curve is normal, otherwise really
Determine rectification module failure.
The zero line break detection device of UPS provided by the present invention is realized, the device base by the controller of UPS itself
It is realized in the controller of UPS itself, compared with the existing technology for the middle mode for increasing hardware, this method is not necessarily to increase hardware,
Cost is relatively low, and this method calculating logic is simple, less for the own resource consumption of controller.
The present invention also provides hardware device corresponding with the above method, specially a kind of UPS, the UPS include memory, are used
In storage computer program；
Controller, the step of zero line break detection method of UPS described above is realized when for executing computer program.
UPS provided by the present invention, controller can realize following method：Detect the phase voltage value of three phase mains input
And the voltage difference between positive direct-current busbar and negative DC bus；Judge voltage difference whether in pre-set zero line break
Calculated value within the scope of；If it is, determining that open circuit occurs for zero curve；Wherein, calculated value range is according to rectification in UPS
The type and phase voltage value of module determine.It can be seen that controller of this method based on UPS itself is realized, relative to existing
For the mode for increasing hardware in technology, for this method without increasing hardware, cost is relatively low, and this method calculating logic is simple, right
It is less in the own resource consumption of controller.
Zero line break detection method, device and the UPS of UPS provided by the present invention are described in detail above.It says
Each embodiment is described by the way of progressive in bright book, and the highlights of each of the examples are the differences with other embodiment
Place, just to refer each other for identical similar portion between each embodiment.For the device disclosed in the embodiment, due to its with
Method disclosed in embodiment is corresponding, so description is fairly simple, reference may be made to the description of the method.It should refer to
Go out, it for those skilled in the art, without departing from the principle of the present invention, can also be to the present invention
Some improvement and modification can also be carried out, these improvement and modification are also fallen within the protection scope of the claims of the present invention.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only that
A little elements, but also include other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Claims (10)
1. the zero line break detection method of UPS a kind of, which is characterized in that this method includes：
Detect the voltage difference between the phase voltage value and positive direct-current busbar and negative DC bus of three phase mains input；
Judge the voltage difference whether within the scope of the calculated value of pre-set zero line break；
If it is, determining that open circuit occurs for zero curve；
Wherein, the calculated value range is determined according to the type of rectification module in UPS and the phase voltage value.
2. the zero line break detection method of UPS according to claim 1, which is characterized in that the rectification module is specially
Three-phase uncontrollable rectifier module, then corresponding, the calculated value range is specially
Wherein, the phase voltage value is the phase voltage value of the three phase mains any one, UiFor the phase voltage value, UerrIt is pre-
The allowable range of error being first arranged.
3. the zero line break detection method of UPS according to claim 1, which is characterized in that the rectification module is specially
Three-phase fully-controlled rectification module, then corresponding, the calculated value range is specially [2.34cos α * Ui-Uerr, 2.34cos α * Ui
+Uerr]；
Wherein, the phase voltage value is the phase voltage value of the three phase mains any one, UiFor the phase voltage value, UerrIt is pre-
The allowable range of error being first arranged, α are the Trigger Angle of thyristor.
4. the zero line break detection method of UPS according to claim 2, which is characterized in that if the voltage difference does not exist
When within the scope of the calculated value, further include then：
Judge the voltage difference whetherIn range；
If it is, determining that the zero curve is normal, the rectification module failure is otherwise determined.
5. the zero line break detection method of UPS according to any one of claims 1-4, which is characterized in that further include：
Corresponding prompt messages are exported according to judging result.
6. the zero line break detection device of UPS a kind of, which is characterized in that the device includes：
Detection unit, the electricity between phase voltage value and positive direct-current busbar and negative DC bus for detecting three phase mains input
Pressure difference；
First judging unit, for judge the voltage difference whether pre-set zero line break calculated value range
It is interior；
Determination unit is when being for the result in first judging unit, it is determined that zero curve generation open circuit；
Wherein, the calculated value range is determined according to the type of rectification module in UPS and the phase voltage value.
7. the zero line break detection device of UPS according to claim 6, which is characterized in that the rectification module is specially
Three-phase uncontrollable rectifier module, then corresponding, the calculated value range is specially
Wherein, the phase voltage value is the phase voltage value of the three phase mains any one, UiFor the phase voltage value, UerrIt is pre-
The allowable range of error being first arranged.
8. the zero line break detection device of UPS according to claim 6, which is characterized in that the rectification module is specially
Three-phase fully-controlled rectification module, then corresponding, the calculated value range is specially [2.34cos α * Ui-Uerr, 2.34cos α * Ui
+Uerr]；
Wherein, the phase voltage value is the phase voltage value of the three phase mains any one, UiFor the phase voltage value, UerrIt is pre-
The allowable range of error being first arranged, α are the Trigger Angle of thyristor.
9. the zero line break detection device of UPS according to claim 7, which is characterized in that if first judging unit
Judging result be it is no when, then further include：
Second judgment unit, for judge the voltage difference whetherIn range；
The determination unit is additionally operable to when the judging result of the second judgment unit is to be, it is determined that and the zero curve is normal,
Otherwise the rectification module failure is determined.
10. a kind of UPS, which is characterized in that including memory, for storing computer program；
Controller realizes that the zero curve such as UPS described in any one of claim 1 to 5 is disconnected when for executing the computer program
The step of road detection method.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298354A (en) * | 2018-11-14 | 2019-02-01 | 厦门科华恒盛股份有限公司 | The detection method and device of system zero-line failure are fallen in a kind of input of uninterruptible power supply |
| CN109655757A (en) * | 2018-12-26 | 2019-04-19 | 漳州科华技术有限责任公司 | A kind of detection method and system of UPS standard |
| CN113960341A (en) * | 2021-10-27 | 2022-01-21 | 成都长城开发科技有限公司 | Ammeter and zero line detection circuitry falls thereof |
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