CN109193554A - A kind of current interference prevention method and device - Google Patents
A kind of current interference prevention method and device Download PDFInfo
- Publication number
- CN109193554A CN109193554A CN201811400615.8A CN201811400615A CN109193554A CN 109193554 A CN109193554 A CN 109193554A CN 201811400615 A CN201811400615 A CN 201811400615A CN 109193554 A CN109193554 A CN 109193554A
- Authority
- CN
- China
- Prior art keywords
- tension apparatus
- zero
- current
- supply circuit
- sequence current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/003—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to reversal of power transmission direction
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of current interference prevention method and devices, are applied to high-tension apparatus current supply circuit；Method includes: to obtain zero-sequence current in high-tension apparatus current supply circuit；Judge whether the zero-sequence current obtained from high-tension apparatus flows to power supply；If so, issuing the fault alarm of corresponding high-tension apparatus or disconnecting high-tension apparatus current supply circuit, the generation that can be avoided rolling electricity influences the problem of electrical equipment works normally.
Description
Technical field
This application involves power electronics field more particularly to a kind of current interference prevention method and devices.
Background technique
Shake caused by electricity refers to because of lightning stroke, short circuit or other reasons the fluctuation of power grid short time voltage or the phenomenon that short supply interruption.
Power supply system, which generates the fundamental type for shaking electricity, to be had: voltage dip rises sharply, short supply interruption, voltage flicker.Generally, work as power supply system
Voltage effective value be down to 30% of nominal value or more, and when last longer (such as 80-200 milliseconds), will result in electrical
Equipment stops working, or produced product quality is caused to decline.
Summary of the invention
In view of this, the embodiment of the present application provides a kind of current interference prevention method and device, it is able to solve and shakes in the prior art
The generation of electricity influences the problem of electrical equipment works normally.
Current interference prevention method provided by the embodiments of the present application is applied to high-tension apparatus current supply circuit；The described method includes:
Obtain zero-sequence current in the high-tension apparatus current supply circuit；
Judge whether the zero-sequence current obtained from high-tension apparatus flows to power supply；
If so, issuing the fault alarm of the corresponding high-tension apparatus or disconnecting the high-tension apparatus current supply circuit.
Optionally, described to judge whether the zero-sequence current that detects from high-tension apparatus flows to power supply, it specifically includes:
Obtain the residual voltage in the high-tension apparatus current supply circuit；
Judge whether the zero-sequence current sets from high pressure according to the angle between the residual voltage and the zero-sequence current
It is standby to flow to power supply.
Optionally, according to the angle between the residual voltage and the zero-sequence current judge the zero-sequence current whether from
High-tension apparatus flows to power supply, specifically includes:
Judge whether the angle between the zero-sequence current and the residual voltage is greater than 175 degree and less than 275 degree.
Optionally, the residual voltage obtained in the high-tension apparatus current supply circuit, later further include:
Judge whether the zero-sequence current obtained exceeds first threshold, and whether the residual voltage obtained exceeds second threshold；
When the zero-sequence current is beyond the first threshold and the residual voltage exceeds the second threshold, institute is executed
State according to the angle between the residual voltage and the zero-sequence current judge the zero-sequence current whether from high-tension apparatus flow to
Power supply.
Optionally, when the high-tension apparatus current supply circuit is the current supply circuit of production equipment, if the zero-sequence current obtained
Power supply is flowed to from high-tension apparatus, then issues the fault alarm of the corresponding high-tension apparatus；
When the high-tension apparatus current supply circuit is to produce the current supply circuit of ancillary equipment or logistics equipment, if obtain zero
Sequence electric current flows to power supply from high-tension apparatus, then disconnects the high-tension apparatus current supply circuit.
Anti-shake electric installation provided by the embodiments of the present application is applied to high-tension apparatus current supply circuit；Described device includes: to obtain
Unit, the first judging unit and protection location；
The acquiring unit, for obtaining zero-sequence current in the high-tension apparatus current supply circuit；
First judging unit, for judging whether zero-sequence current that the acquiring unit obtains flows to from high-tension apparatus
Power supply；
The protection location, for powering when first judging unit judges that the zero-sequence current is flowed to from high-tension apparatus
When power supply, issues the fault alarm of the corresponding high-tension apparatus or disconnect the high-tension apparatus current supply circuit.
Optionally, the acquiring unit is also used to obtain the residual voltage in the high-tension apparatus current supply circuit；
First judging unit, specifically for the residual voltage and the zero-sequence current obtained according to the acquiring unit
Between angle judge whether the zero-sequence current from high-tension apparatus flows to power supply.
Optionally, first judging unit, specifically for judging between the zero-sequence current and the residual voltage
Whether angle is greater than 175 degree and less than 275 degree.
Optionally, described device further include: second judgment unit and third judging unit；
Whether the second judgment unit, the zero-sequence current for judging that the acquiring unit obtains exceed first threshold；
Whether the third judging unit, the residual voltage for judging that the acquiring unit obtains exceed second threshold；
First judging unit, for judging the zero-sequence current beyond first threshold when the second judgment unit
When value and the third judging unit judges that the residual voltage exceeds the second threshold, according to the residual voltage and described
Angle between zero-sequence current judges whether the zero-sequence current from high-tension apparatus flows to power supply.
Optionally, when the high-tension apparatus current supply circuit is the current supply circuit of production equipment, the protection location includes:
Alarm part-unit；When the high-tension apparatus current supply circuit is to produce the current supply circuit of ancillary equipment or logistics equipment, the guarantor
Protecting unit includes: control subelement；
The alarm part-unit, for being supplied when first judging unit judges that the zero-sequence current is flowed to from high-tension apparatus
When power supply, the fault alarm of the corresponding high-tension apparatus is issued；
The control subelement, for being supplied when first judging unit judges that the zero-sequence current is flowed to from high-tension apparatus
When power supply, the high-tension apparatus current supply circuit is disconnected.
Compared with prior art, the application has at least the following advantages:
In the embodiment of the present application, it since zero-sequence current is when current supply circuit breaks down because shaking electricity, is equivalent in failure
Point produces its value residual voltage equal in magnitude, contrary with phase voltage before failure, will lead to zero in current supply circuit
Sequence electric current flows to power supply from high-tension apparatus.After obtaining the zero-sequence current in high-tension apparatus current supply circuit, judge to obtain
Zero-sequence current whether from high-tension apparatus flow to power supply, when the zero-sequence current of acquisition flows to power supply from high-tension apparatus
When, it determines in high-tension apparatus current supply circuit and breaks down because shaking electricity, issue fault alarm or disconnect high-tension apparatus current supply circuit, energy
Enough avoid the problem that the generation for shaking electricity influences electrical equipment and works normally.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the application scenarios schematic diagram of a kind of current interference prevention method provided by the embodiments of the present application and device；
Fig. 2 is a kind of flow diagram of current interference prevention method provided by the embodiments of the present application；
Fig. 3 is the schematic diagram in the zero-sequence current direction of the application specific embodiment；
Fig. 4 is the flow diagram of another current interference prevention method provided by the embodiments of the present application；
Fig. 5 is a kind of structural schematic diagram of anti-shake electric installation provided by the embodiments of the present application；
Fig. 6 is the structural schematic diagram of the anti-shake electric installation of another kind provided by the embodiments of the present application.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only this
Apply for a part of the embodiment, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall in the protection scope of this application.
In order to make it easy to understand, introducing the application of a kind of current interference prevention method provided by the embodiments of the present application and device first below
Scene.
Referring to Fig. 1, the application scenarios schematic diagram of a kind of current interference prevention method provided by the embodiments of the present application and device.The application
A kind of current interference prevention method and device that embodiment provides, are applied in high-tension apparatus current supply circuit shown in Fig. 1 dotted line frame.Its
In, route A, B and C are the three phase supply bus for connecting power supply unit.Every power supply buses are through three phase supply branch connection one
The three phase supply input terminal of a high-tension apparatus.In practical application, a power supply buses can be simultaneously more high-tension apparatus power supplies.
As shown in Figure 1.
It under normal circumstances, include zero-sequence network in high voltage supply circuit.Zero-sequence network is by element pair in voltage network at the same level
The equivalent capacitance on ground constitutes access, and the neutral point for having ground connection with solidly earthed neutral system constitutes access and differs greatly from,
The zero sequence impedance of zero-sequence network is very big.
A kind of current interference prevention method provided by the embodiments of the present application and device will be described in detail below.
Referring to fig. 2, which is a kind of flow diagram of current interference prevention method provided by the embodiments of the present application.
Current interference prevention method provided by the embodiments of the present application, comprising:
S201: zero-sequence current in high-tension apparatus current supply circuit is obtained.
It should be noted that being equivalent to raw in fault point when high voltage supply circuit is broken down because shaking the generation of electricity
Its value residual voltage equal in magnitude, contrary with phase voltage before failure has been produced, thus the connection of same power supply buses
All zero-sequence current will all occur in power supply branch road.
In the embodiment of the present application, zero-sequence current can use fault wave recording device and be acquired in high-tension apparatus current supply circuit
Data obtain, at this to the preparation method of zero-sequence current without limit.Fault wave recording device can be continuous with Millisecond stable state
Record, by analyze the voltage fluctuation amplitude of power supply system waveform, current fluctuation amplitude, phase angle variations rate, frequency change rate,
Operation time limit, confirmation fault type and failure are separate, from the variable quantity for adopting zero-sequence current and are moved by analysis fault wave recording device
Fault branch and single-phase earthing point distance can precisely be searched by making the time limit.
S202: judge whether the zero-sequence current obtained from high-tension apparatus flows to power supply；If so, thening follow the steps
S203。
It is understood that when breaking down in high-tension apparatus current supply circuit, high-tension apparatus current supply circuit flow through zero
Sequence electric current, numerical value are the summation of total system non-faulting element capacitive earth current, and the actual direction of capacitive reactive power is
Bus is flowed to by route.And when other current supply circuit failures in same power supply system, and the high-tension apparatus current supply circuit is not sent out
When raw failure, the zero-sequence current that high-tension apparatus current supply circuit flows through, numerical value is equal to the capacitive earth current of itself, capacitive character without
The actual direction of function power is to flow to route by bus.Such as shown in Fig. 3, because shaking electricity at intermediate power supply branch road node O
When breaking down, in the zero-sequence current direction such as Fig. 3 of the zero-sequence current of intermediate power supply branch road and other power supply branch roads
Shown in arrow.Therefore, in the embodiment of the present application, can be supplied by the way that whether the zero-sequence current for judging to obtain flows to from high-tension apparatus
Power supply determines in the high-tension apparatus current supply circuit whether to break down because shaking electricity.
It, can be according to residual voltage in high-tension apparatus current supply circuit in some possible implementations of the embodiment of the present application
Angle judges whether zero-sequence current from high-tension apparatus flows to power supply between zero-sequence current.Then, as shown in figure 4, step
S202 can specifically include:
S2021: the residual voltage in high-tension apparatus current supply circuit is obtained.
In the embodiment of the present application, residual voltage also can use fault wave recording device data collected and obtain, here
To the preparation method of residual voltage without limiting.
S2022: according to the angle between residual voltage and zero-sequence current judge zero-sequence current whether from high-tension apparatus flow to
Power supply.
As an example, step S2022 can specifically include: judge that the angle between zero-sequence current and residual voltage is
It is no to be greater than 175 degree and less than 275 degree.When the angle between zero-sequence current and residual voltage is greater than 175 degree and less than 275 degree, i.e.,
It can determine whether zero-sequence current from high-tension apparatus flows to power supply.
It should also be noted that, in practical applications, being influenced by factors such as system or external interferences, when not because shaking electricity hair
When raw failure, zero-sequence current and residual voltage may also be detected in high-tension apparatus current supply circuit.For this purpose, in the embodiment of the present application
In some possible implementations, after step S2021, can also include:
Judge whether the zero-sequence current obtained exceeds first threshold, and whether the residual voltage obtained exceeds second threshold；
When zero-sequence current is beyond first threshold and residual voltage exceeds second threshold, step S2022 is executed.
In practical application, first threshold and second threshold according to circumstances can specifically be set, herein without limiting
It will not enumerate.
S203: issuing the fault alarm of the corresponding high-tension apparatus or disconnects high-tension apparatus current supply circuit.
In practical applications, the tune of adaptability can be carried out to its anti-shake electricity strategy according to the significance level of high-tension apparatus
It is whole.If high-tension apparatus, which is shut down, to produce bigger effect production, life, can be issued described this when it breaks down
The fault alarm of high-tension apparatus to debug in time.If the influence that high-tension apparatus is shut down to production, life generation is smaller,
Can be when it break down, directly disconnecting high-tension apparatus current supply circuit makes its shutdown, guarantees system safety.
Specifically, step S203 may include: in some possible implementations of the embodiment of the present application
When high-tension apparatus current supply circuit is the current supply circuit of production equipment, if the zero-sequence current obtained is from high-tension apparatus stream
To power supply, then the fault alarm of the corresponding high-tension apparatus is issued；When high-tension apparatus current supply circuit is production ancillary equipment
Or logistics equipment current supply circuit when, if obtain zero-sequence current flow to power supply from high-tension apparatus, disconnect high-tension apparatus
Current supply circuit.
In a specific application scenarios, such as ammonia production system, the production equipment be can be in system
A kind of equipment, including but not limited to: boiler, space division, recirculated water, desalted water, water purification station, purification, gasification, ammonia synthesis urea and first
Alkane air compressor etc..The production ancillary equipment or logistics equipment can be two class equipment and three classes equipment in system, packet
Include but be not limited to: sewage, recycle-water, the crystallization water, strong brine, efficiently reverse osmosis, head-tank, gasification belt, LNG vaporization device with
And equipment in dining room and office building etc..
In the embodiment of the present application, it since zero-sequence current is when current supply circuit breaks down because shaking electricity, is equivalent in failure
Point produces its value residual voltage equal in magnitude, contrary with phase voltage before failure, will lead to zero in current supply circuit
Sequence electric current flows to power supply from high-tension apparatus.After obtaining the zero-sequence current in high-tension apparatus current supply circuit, judge to obtain
Zero-sequence current whether from high-tension apparatus flow to power supply, when the zero-sequence current of acquisition flows to power supply from high-tension apparatus
When, it determines in high-tension apparatus current supply circuit and breaks down because shaking electricity, issue fault alarm or disconnect high-tension apparatus current supply circuit, energy
Enough avoid the problem that the generation for shaking electricity influences electrical equipment and works normally.
The current interference prevention method provided based on the above embodiment, the embodiment of the present application also provides a kind of anti-shake electric installations.
Referring to Fig. 5, which is a kind of structural schematic diagram of anti-shake electric installation provided by the embodiments of the present application.
Anti-shake electric installation provided by the embodiments of the present application, comprising: acquiring unit 100, the first judging unit 200 and protection are single
Member 300；
Acquiring unit 100, for obtaining zero-sequence current in high-tension apparatus current supply circuit.
It should be noted that being equivalent to raw in fault point when high voltage supply circuit is broken down because shaking the generation of electricity
Its value residual voltage equal in magnitude, contrary with phase voltage before failure has been produced, thus the connection of same power supply buses
All zero-sequence current will all occur in power supply branch road.
In the embodiment of the present application, zero-sequence current can use fault wave recording device and be acquired in high-tension apparatus current supply circuit
Data obtain, at this to the preparation method of zero-sequence current without limit.Fault wave recording device can be continuous with Millisecond stable state
Record, by analyze the voltage fluctuation amplitude of power supply system waveform, current fluctuation amplitude, phase angle variations rate, frequency change rate,
Operation time limit, confirmation fault type and failure are separate, from the variable quantity for adopting zero-sequence current and are moved by analysis fault wave recording device
Fault branch and single-phase earthing point distance can precisely be searched by making the time limit.
First judging unit 201 is supplied for judging whether the zero-sequence current of the acquisition of acquiring unit 100 flows to from high-tension apparatus
Power supply.
It is understood that when breaking down in high-tension apparatus current supply circuit, high-tension apparatus current supply circuit flow through zero
Sequence electric current, numerical value are the summation of total system non-faulting element capacitive earth current, and the actual direction of capacitive reactive power is
Bus is flowed to by route.And when other current supply circuit failures in same power supply system, and the high-tension apparatus current supply circuit is not sent out
When raw failure, the zero-sequence current that high-tension apparatus current supply circuit flows through, numerical value is equal to the capacitive earth current of itself, capacitive character without
The actual direction of function power is to flow to route by bus.Therefore, in the embodiment of the present application, the zero sequence that can be obtained by judgement
Whether electric current from high-tension apparatus flows to power supply to determine in the high-tension apparatus current supply circuit whether to break down because shaking electricity.
In some possible implementations of the embodiment of the present application, acquiring unit 100 can be also used for obtaining high-tension apparatus
Residual voltage in current supply circuit.In the embodiment of the present application, it is collected also to can use fault wave recording device for residual voltage
Data obtain, here to the preparation method of residual voltage without limiting.
Then, the first judging unit 201, the residual voltage that specifically can be used for being obtained according to acquiring unit 100 and zero sequence electricity
Angle between stream judges whether zero-sequence current from high-tension apparatus flows to power supply.
As an example, the first judging unit 201 specifically can be used for judging between zero-sequence current and residual voltage
Whether angle is greater than 175 degree and less than 275 degree.
It should also be noted that, in practical applications, being influenced by factors such as system or external interferences, when not because shaking electricity hair
When raw failure, zero-sequence current and residual voltage may also be detected in high-tension apparatus current supply circuit.For this purpose, in the embodiment of the present application
In some possible implementations, as shown in fig. 6, anti-shake electric installation can also include: second judgment unit 202 and third judgement
Unit 203；
Whether second judgment unit 202, the zero-sequence current for judging that acquiring unit 100 obtains exceed first threshold；
Whether third judging unit 203, the residual voltage for judging that acquiring unit 100 obtains exceed second threshold；
First judging unit 201, for judging that zero-sequence current exceeds first threshold and third is sentenced when second judgment unit 202
When disconnected unit 203 judges residual voltage beyond second threshold, zero sequence is judged according to the angle between residual voltage and zero-sequence current
Whether electric current from high-tension apparatus flows to power supply.
In practical application, first threshold and second threshold according to circumstances can specifically be set, herein without limiting
It will not enumerate.
Protection location 300, for sending out when the first judging unit judges that zero-sequence current flows to power supply from high-tension apparatus
The fault alarm of the high-tension apparatus is corresponded to out or disconnects high-tension apparatus current supply circuit.
In practical applications, the tune of adaptability can be carried out to its anti-shake electricity strategy according to the significance level of high-tension apparatus
It is whole.If high-tension apparatus, which is shut down, to produce bigger effect production, life, can be issued described this when it breaks down
The fault alarm of high-tension apparatus to debug in time.If the influence that high-tension apparatus is shut down to production, life generation is smaller,
Can be when it break down, directly disconnecting high-tension apparatus current supply circuit makes its shutdown, guarantees system safety.
Specifically, in some possible implementations of the embodiment of the present application, when high-tension apparatus current supply circuit is that production is set
When standby current supply circuit, protection location 300 may include: alarm part-unit；When high-tension apparatus current supply circuit is that production auxiliary is set
When standby or logistics equipment current supply circuit, protection location 300 may include: control subelement；
Alarm part-unit, for when the first judging unit 201 judges that zero-sequence current flows to power supply from high-tension apparatus,
Issue the fault alarm of the corresponding high-tension apparatus；
Subelement is controlled, for when the first judging unit 202 judges that zero-sequence current flows to power supply from high-tension apparatus,
Disconnect high-tension apparatus current supply circuit.
In the embodiment of the present application, it since zero-sequence current is when current supply circuit breaks down because shaking electricity, is equivalent in failure
Point produces its value residual voltage equal in magnitude, contrary with phase voltage before failure, will lead to zero in current supply circuit
Sequence electric current flows to power supply from high-tension apparatus.After obtaining the zero-sequence current in high-tension apparatus current supply circuit, judge to obtain
Zero-sequence current whether from high-tension apparatus flow to power supply, when the zero-sequence current of acquisition flows to power supply from high-tension apparatus
When, it determines in high-tension apparatus current supply circuit and breaks down because shaking electricity, issue fault alarm or disconnect high-tension apparatus current supply circuit, energy
Enough avoid the problem that the generation for shaking electricity influences electrical equipment and works normally.
It should be appreciated that in this application, " at least one (item) " refers to one or more, and " multiple " refer to two or two
More than a."and/or" indicates may exist three kinds of relationships, for example, " A and/or B " for describing the incidence relation of affiliated partner
It can indicate: only exist A, only exist B and exist simultaneously tri- kinds of situations of A and B, wherein A, B can be odd number or plural number.Word
Symbol "/" typicallys represent the relationship that forward-backward correlation object is a kind of "or"." at least one of following (a) " or its similar expression, refers to
Any combination in these, any combination including individual event (a) or complex item (a).At least one of for example, in a, b or c
(a) can indicate: a, b, c, " a and b ", " a and c ", " b and c ", or " a and b and c ", and wherein a, b, c can be individually, can also
To be multiple.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
The above is only the preferred embodiment of the application, not makes any form of restriction to the application.Though
Right the application has been disclosed in a preferred embodiment above, however is not limited to the application.It is any to be familiar with those skilled in the art
Member, in the case where not departing from technical scheme ambit, all using the methods and technical content of the disclosure above to the application
Technical solution makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, it is all without departing from
The content of technical scheme, any simple modification made to the above embodiment of the technical spirit of foundation the application are equal
Variation and modification, still fall within technical scheme protection in the range of.
Claims (10)
1. a kind of current interference prevention method, which is characterized in that be applied to high-tension apparatus current supply circuit；The described method includes:
Obtain zero-sequence current in the high-tension apparatus current supply circuit；
Judge whether the zero-sequence current obtained from high-tension apparatus flows to power supply；
If so, issuing the fault alarm of the corresponding high-tension apparatus or disconnecting the high-tension apparatus current supply circuit.
2. judging whether the zero-sequence current detected sets from high pressure the method according to claim 1, wherein described
It is standby to flow to power supply, it specifically includes:
Obtain the residual voltage in the high-tension apparatus current supply circuit；
Judge the zero-sequence current whether from high-tension apparatus stream according to the angle between the residual voltage and the zero-sequence current
To power supply.
3. according to the method described in claim 2, it is characterized in that, according between the residual voltage and the zero-sequence current
Angle judges whether the zero-sequence current from high-tension apparatus flows to power supply, specifically includes:
Judge whether the angle between the zero-sequence current and the residual voltage is greater than 175 degree and less than 275 degree.
4. according to the method in claim 2 or 3, which is characterized in that described to obtain in the high-tension apparatus current supply circuit
Residual voltage, later further include:
Judge whether the zero-sequence current obtained exceeds first threshold, and whether the residual voltage obtained exceeds second threshold；
When the zero-sequence current is beyond the first threshold and the residual voltage exceeds the second threshold, described is executed
Judge whether the zero-sequence current flows to from high-tension apparatus according to the angle between the residual voltage and the zero-sequence current to power
Power supply.
5. method according to claim 1 to 3, which is characterized in that
When the high-tension apparatus current supply circuit is the current supply circuit of production equipment, if the zero-sequence current obtained is from high-tension apparatus stream
To power supply, then the fault alarm of the corresponding high-tension apparatus is issued；
When the high-tension apparatus current supply circuit is to produce the current supply circuit of ancillary equipment or logistics equipment, if the zero sequence electricity obtained
Stream flows to power supply from high-tension apparatus, then disconnects the high-tension apparatus current supply circuit.
6. a kind of anti-shake electric installation, which is characterized in that be applied to high-tension apparatus current supply circuit；Described device include: acquiring unit,
First judging unit and protection location；
The acquiring unit, for obtaining zero-sequence current in the high-tension apparatus current supply circuit；
First judging unit is powered for judging whether the zero-sequence current of the acquiring unit acquisition flows to from high-tension apparatus
Power supply；
The protection location, for judging that the zero-sequence current flows to power supply from high-tension apparatus when first judging unit
When, it issues the fault alarm of the corresponding high-tension apparatus or disconnects the high-tension apparatus current supply circuit.
7. device according to claim 6, which is characterized in that
The acquiring unit is also used to obtain the residual voltage in the high-tension apparatus current supply circuit；
First judging unit, specifically between the residual voltage and the zero-sequence current that are obtained according to the acquiring unit
Angle judge whether the zero-sequence current from high-tension apparatus flows to power supply.
8. device according to claim 7, which is characterized in that first judging unit is specifically used for judging described zero
Whether the angle between sequence electric current and the residual voltage is greater than 175 degree and less than 275 degree.
9. device according to claim 7 or 8, which is characterized in that described device further include: second judgment unit and third
Judging unit；
Whether the second judgment unit, the zero-sequence current for judging that the acquiring unit obtains exceed first threshold；
Whether the third judging unit, the residual voltage for judging that the acquiring unit obtains exceed second threshold；
First judging unit, for when the second judgment unit judge zero-sequence current exceed the first threshold and
When the third judging unit judges the residual voltage beyond the second threshold, according to the residual voltage and the zero sequence
Angle between electric current judges whether the zero-sequence current from high-tension apparatus flows to power supply.
10. according to device described in claim 6-8 any one, which is characterized in that when the high-tension apparatus current supply circuit is
When the current supply circuit of production equipment, the protection location includes: alarm part-unit；When the high-tension apparatus current supply circuit is production
When the current supply circuit of ancillary equipment or logistics equipment, the protection location includes: control subelement；
The alarm part-unit, for judging that the zero-sequence current flows to power supply electricity from high-tension apparatus when first judging unit
When source, the fault alarm of the corresponding high-tension apparatus is issued；
The control subelement, for judging that the zero-sequence current flows to power supply electricity from high-tension apparatus when first judging unit
When source, the high-tension apparatus current supply circuit is disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811400615.8A CN109193554A (en) | 2018-11-22 | 2018-11-22 | A kind of current interference prevention method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811400615.8A CN109193554A (en) | 2018-11-22 | 2018-11-22 | A kind of current interference prevention method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109193554A true CN109193554A (en) | 2019-01-11 |
Family
ID=64938050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811400615.8A Pending CN109193554A (en) | 2018-11-22 | 2018-11-22 | A kind of current interference prevention method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109193554A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721114A (en) * | 2021-09-13 | 2021-11-30 | 国网湖南省电力有限公司 | High-resistance earth fault line selection method, system and storage medium for resonant earth distribution network |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706664A (en) * | 2009-10-10 | 2010-05-12 | 北京和利时自动化驱动技术有限公司 | Method for debugging switch controller |
| CN101707345A (en) * | 2009-10-10 | 2010-05-12 | 北京和利时自动化驱动技术有限公司 | Method for controlling switch controller |
| CN102751701A (en) * | 2011-04-20 | 2012-10-24 | 北京德威特继保自动化科技股份有限公司 | Electric motor current interference prevention method |
| CN103178529A (en) * | 2013-04-03 | 2013-06-26 | 杭州银湖电气设备有限公司 | Phase-splitting control method and device of magnetic control type quick response dynamic reactive power compensation system |
| CN104993711A (en) * | 2015-05-22 | 2015-10-21 | 国网河南省电力公司电力科学研究院 | Voltage sag transition process simulation device and method |
| CN105140892A (en) * | 2015-07-21 | 2015-12-09 | 河南行知专利服务有限公司 | Line protection method for power transmission line |
-
2018
- 2018-11-22 CN CN201811400615.8A patent/CN109193554A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706664A (en) * | 2009-10-10 | 2010-05-12 | 北京和利时自动化驱动技术有限公司 | Method for debugging switch controller |
| CN101707345A (en) * | 2009-10-10 | 2010-05-12 | 北京和利时自动化驱动技术有限公司 | Method for controlling switch controller |
| CN102751701A (en) * | 2011-04-20 | 2012-10-24 | 北京德威特继保自动化科技股份有限公司 | Electric motor current interference prevention method |
| CN103178529A (en) * | 2013-04-03 | 2013-06-26 | 杭州银湖电气设备有限公司 | Phase-splitting control method and device of magnetic control type quick response dynamic reactive power compensation system |
| CN104993711A (en) * | 2015-05-22 | 2015-10-21 | 国网河南省电力公司电力科学研究院 | Voltage sag transition process simulation device and method |
| CN105140892A (en) * | 2015-07-21 | 2015-12-09 | 河南行知专利服务有限公司 | Line protection method for power transmission line |
Non-Patent Citations (1)
| Title |
|---|
| 赵博识等: "马钢新区能源系统防晃电措施应用", 《冶金动力》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721114A (en) * | 2021-09-13 | 2021-11-30 | 国网湖南省电力有限公司 | High-resistance earth fault line selection method, system and storage medium for resonant earth distribution network |
| CN113721114B (en) * | 2021-09-13 | 2024-01-19 | 国网湖南省电力有限公司 | High-resistance ground fault line selection method, system and storage medium for resonant ground power distribution network |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11183841B2 (en) | System and method for managing power feeds through waveform monitoring | |
| US9720476B1 (en) | Automatic transfer switch with power quality module | |
| CN102508100B (en) | A kind of node current that base is synchronous when utilizing judges the method for line fault | |
| CN103376348B (en) | Control the method for fault current in for the system of electric power monitoring system | |
| CN104216497A (en) | Power supply fault detection device and method | |
| CN102890210A (en) | Fault detection device and method | |
| Kanakasabapathy et al. | Digital protection scheme for microgrids using wavelet transform | |
| CN101819261B (en) | Three-phase source phase failure and power failure detection circuit | |
| CN109193554A (en) | A kind of current interference prevention method and device | |
| US10516260B2 (en) | Multi-node system fault management | |
| CN113972634B (en) | Micro-grid differential protection method for self-adaptive zero-sequence energy injection | |
| Niewind et al. | Operation and protection of 380V DC distribution systems | |
| CN109921389A (en) | A kind of direct-current grid fault protecting method and system | |
| CN104104115A (en) | Multichannel high-accuracy reverse power control system and reverse power protection control method | |
| Abu-Elanien et al. | An ANN-based protection technique for MTDC systems with multiple configurations | |
| Aboelezz et al. | Efficient fault detection, localization, and isolation in MT-HVDC systems based on distance protection and LoRaWAN communication | |
| EP3171474B1 (en) | Isolated dc power supply device | |
| Menon et al. | Islanding detection technique of distribution generation system | |
| Majee et al. | IoT based reconfiguration of microgrids through an automated central protection centre | |
| CN106771512B (en) | A kind of direct current current-limiting device installation judgment method and device | |
| CN202903913U (en) | Fault detection device | |
| CN207442439U (en) | A kind of direct-current micro-grid adaptive guard system based on hierarchical control | |
| US10802563B2 (en) | Power supply apparatus and method for server | |
| KR101338125B1 (en) | Intelligent and Adaptive Protection System for Varying Power System Conditions to Prevent Transient Instability | |
| CN110601182A (en) | Circuit and method for realizing zero-live wire mixed connection by utilizing zero-live wire phase information |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190111 |
|
| RJ01 | Rejection of invention patent application after publication |