CN109839524A - Voltage dip generator and voltage dip control system - Google Patents
Voltage dip generator and voltage dip control system Download PDFInfo
- Publication number
- CN109839524A CN109839524A CN201910079256.9A CN201910079256A CN109839524A CN 109839524 A CN109839524 A CN 109839524A CN 201910079256 A CN201910079256 A CN 201910079256A CN 109839524 A CN109839524 A CN 109839524A
- Authority
- CN
- China
- Prior art keywords
- voltage
- signal
- module
- dip
- voltage dip
- 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.)
- Granted
Links
Landscapes
- Inverter Devices (AREA)
Abstract
The present invention provides a kind of voltage dip generator and voltage dip control systems, are related to voltage dip technical field, comprising: voltage control module, reference voltage generation module, signal conditioning module, jump signal generation module, modulation module and computing module；Computing module is used for, to voltage control module output to temporarily drop voltage, it is poor to make with the current reference voltage of reference voltage generation module output, it will make the first error signal that difference obtains and be sent to signal conditioning module, so that processing, which is adjusted, to first error signal in signal conditioning module obtains the first modulated signal；Computing module is also used to, and the jump signal exported to the first modulated signal and jump signal generation module sums to obtain the second modulated signal；Modulation module generates first control signal according to the second modulated signal, so that voltage control module, which treats temporarily drop voltage according to first control signal, carries out voltage adjustment.The present invention can quickly control the transient state switching of voltage dip, promote the effect of voltage dip.
Description
Technical field
The present invention relates to voltage dip technical fields, control more particularly, to a kind of voltage dip generator and voltage dip
System.
Background technique
There are the voltage sag conditions for causing production loss in power grid, is that detecting electric equipment is interfered by voltage dip
When working condition, need simulating grid generate temporarily drop voltage.
Temporarily drop voltage, but ratio is generated currently, usually controlling by electric system using PI and carrying out proportion adjustment to voltage
Size setting be easy to make system to generate concussion stability is poor, especially cut in the transient state of the temporary drop this special operation condition of voltage of output
During changing, the voltage that proportionality coefficient is excessive to will lead to output generate concussion can not fast and stable, proportionality coefficient is too small to be will lead to
Temporarily the drop process used time is more long；It is difficult to realize in addition, PI is used only in different temporary drawdown degree requirement simulations to voltage dip
Effectively control.Temporarily drop voltage is generated by the way of PI control, transient state switch speed is slower, ineffective.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of voltage dip generator and voltage dip control system, with
Transient state switching is fast implemented, the effect of voltage dip is promoted.
In a first aspect, the embodiment of the invention provides a kind of voltage dip generators, comprising: voltage control module, reference
Voltage generation module, signal conditioning module, jump signal generation module, modulation module and computing module；
Computing module is used for, to voltage control module output to temporarily drop voltage and reference voltage generation module output
It is poor that current reference voltage is made, and will make the first error signal that difference obtains and is sent to signal conditioning module, so that signal conditioning module
Processing is adjusted to first error signal, obtains the first modulated signal；Wherein, current reference voltage is based on preset reference
What voltage change function determined；Reference voltage variation function is the function that reference voltage changes over time；Computing module is also used to,
To the jump signal summation that the first modulated signal and jump signal generation module export, the second modulated signal is obtained；Jump signal
Based in modulation module triangle wave amplitude and preset reference voltage parameter generate；Modulation module is used for, according to the second modulation
Signal generates first control signal, so that voltage control module, which treats temporarily drop voltage according to first control signal, carries out voltage tune
It is whole.
With reference to first aspect, the embodiment of the invention provides the first possible embodiments of first aspect, wherein ginseng
Examining voltage parameter includes that moment and phase value occur for voltage magnitude, voltage dip after voltage magnitude, voltage dip before voltage dip；
Jump signal generation module is used for: according to phase value, determining the type of jump signal；Wherein, the type of jump signal includes prominent
Plus signal and anticlimax signal；According to the triangle wave amplitude in modulation module, the amplitude of jump signal is determined；Before voltage dip
Voltage magnitude after voltage magnitude, voltage dip determines the effect duration of jump signal；Type, amplitude based on jump signal, work
Moment generation jump signal occurs with duration and voltage dip.
The possible embodiment of with reference to first aspect the first, the embodiment of the invention provides second of first aspect
Possible embodiment, wherein jump signal generation module is also used to: after voltage magnitude, voltage dip before voltage dip
Voltage magnitude determines that depth intervals temporarily drop in target voltage；From preset voltage dip depth intervals-action time table search with
The depth intervals corresponding interacting goals time temporarily drops in target voltage, when the interacting goals time is determined as the effect of jump signal
It is long.
The possible embodiment of with reference to first aspect the first, the embodiment of the invention provides first aspect third
The possible embodiment of kind, wherein reference voltage generation module is used for, and is generated reference voltage according to reference voltage parameter and is changed letter
Number.
With reference to first aspect, the embodiment of the invention provides the 4th kind of possible embodiments of first aspect, wherein adjusts
Molding block includes triangular-wave generator and comparator；Triangular-wave generator is used for, and generates triangular signal；Comparator is used for, root
First control signal is converted by the second modulated signal according to triangular signal.
With reference to first aspect, the embodiment of the invention provides the 5th kind of possible embodiments of first aspect, wherein electricity
Pressing control module includes: sequentially connected DC power supply, inverter, transformer and filter circuit；Voltage control module is also used to
The switching device in inverter is adjusted according to first control signal, so that the voltage of DC power supply is by inverter, change
It is converted into after depressor and filter circuit to temporarily drop voltage.
The 5th kind of possible embodiment with reference to first aspect, the embodiment of the invention provides the 6th kind of first aspect
Possible embodiment, wherein filter circuit is LC filter circuit；Inverter includes H bridge inverter.
The 6th kind of possible embodiment with reference to first aspect, the embodiment of the invention provides the 7th kind of first aspect
Possible embodiment, further includes: inductive current detection module；Inductive current detection module respectively with LC filter circuit and calculating
Module connection；Inductive current detection module is used for, and detects the inductive current of LC filter circuit；Computing module is also used to, by inductance
After electric current is multiplied by feedback factor, it is poor to make with the second modulated signal, obtains third modulated signal；Modulation module is modulated according to third to be believed
Number generate second control signal so that voltage control module according to second control signal treat temporarily drop voltage carry out voltage adjustment.
With reference to first aspect, the embodiment of the invention provides the 8th kind of possible embodiments of first aspect, wherein letter
Number conditioning module includes pi regulator.
Second aspect, the embodiment of the invention provides a kind of voltage dip control systems, comprising: test equipment and such as first
The possible described in any item voltage dip generators of embodiment of the 8th kind of aspect to first aspect；Voltage dip generator
In voltage control module connect with test equipment.
The embodiment of the present invention bring it is following the utility model has the advantages that
The embodiment of the invention provides a kind of voltage dip generator and voltage dip control systems, comprising: voltage control
Module, reference voltage generation module, signal conditioning module, jump signal generation module, modulation module and computing module；Calculate mould
Block is used for, and is made to the current reference voltage to temporarily drop voltage and the output of reference voltage generation module of voltage control module output
Difference will make the first error signal that difference obtains and be sent to signal conditioning module, so that signal conditioning module is to first error signal
Processing is adjusted, obtains the first modulated signal；Wherein, current reference voltage is true based on preset reference voltage variation function
Fixed；Reference voltage variation function is the function that reference voltage changes over time；Computing module is also used to, to the first modulated signal
With the jump signal summation of jump signal generation module output, the second modulated signal is obtained；Jump signal is based in modulation module
Triangle wave amplitude and preset reference voltage parameter generate；Modulation module, which generates the first control according to the second modulated signal, to be believed
Number, so that voltage control module, which treats temporarily drop voltage according to first control signal, carries out voltage adjustment.The embodiment of the present invention provides
Aforesaid way temporarily drop voltage treated by the jump signal that signal conditioning module and jump signal generation module generate carry out
Processing, is converted to control signal for the modulated module of the second modulated signal obtained after processing, further according to control signal to temporary drop
Voltage adjustment, it is middle in such a way that PI control carries out proportion adjustment to voltage compared to the prior art, according to reference voltage parameter
And the triangle wave amplitude of modulation module joined jump signal, can quickly control transient state switching when voltage dip, effectively
Promote the effect of voltage dip.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention are in specification, claims
And specifically noted structure is achieved and obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of voltage dip generator provided in an embodiment of the present invention；
Fig. 2 is a kind of circuit diagram of voltage dip generator provided in an embodiment of the present invention；
Fig. 3 is a kind of artificial circuit schematic diagram provided in an embodiment of the present invention；
Fig. 4 is a kind of simulation waveform schematic diagram provided in an embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram of voltage dip control system provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Voltage dip is one of distinct issues the most in power quality in power grid, and causes production loss important
Factor.Working condition when being interfered for detecting electric equipment by voltage dip needs simulating grid to generate temporarily drop voltage.Electric power
The voltage dip generator that electronic device is realized has many advantages, such as that control is flexible, output voltage precision is high and is widely adopted.With
The core technology that power electronic equipment simulating grid temporarily drops is the quick control of transient state handoff procedure when voltage dip.
Temporarily drop voltage, PI control are generated currently, usually controlling by electric system using PI and carrying out proportion adjustment to voltage
The advantages that simple, robustness is good with its structure, is widely applied in current transformer control.Proportional controller can improve the response of system
Speed reduces the steady-state error of system, improves the control precision of system.But the size setting of ratio is easy that system is made to generate shake
Swing that stability is poor, especially in output temporarily the transient state handoff procedure of drop this special operation condition of voltage, proportionality coefficient is crossed conference and led
Cause the voltage of output generate concussion can not fast and stable, proportionality coefficient is too small, and to will lead to the temporarily drop process used time more long；In addition, not
PI is used only in same temporary drawdown degree requirement simulation and is difficult to realize effective control to voltage dip.It is produced by the way of PI control
Raw temporarily drop voltage, transient state switch speed is slower, ineffective.
Based on this, a kind of voltage dip generator provided in an embodiment of the present invention and voltage dip control system can be fast
Speed realizes transient state switching, promotes the effect of voltage dip.
For convenient for understanding the present embodiment, first to a kind of voltage dip generator disclosed in the embodiment of the present invention
It describes in detail.
In one embodiment, the embodiment of the invention provides a kind of voltage dip generator, shown in Figure 1 one
The structural schematic diagram of kind voltage dip generator, includes: voltage control module 102, reference voltage generation module as shown in the figure
104, signal conditioning module 106, jump signal generation module 108, modulation module 110 and computing module 112；Wherein, mould is calculated
Block 112 generates mould with voltage control module 102, reference voltage generation module 104, signal conditioning module 106, jump signal respectively
Block 108 and modulation module 110 connect, and voltage control module 102 is connect with modulation module 110.
Specifically, computing module 112 is used for, voltage control module 102 is exported raw to temporarily drop voltage and reference voltage
It is poor to make at the current reference voltage that module 104 exports, and will make the first error signal that difference obtains and is sent to signal conditioning module
106, so that processing is adjusted to first error signal in signal conditioning module 106, obtain the first modulated signal.
Wherein, current reference voltage is determined based on preset reference voltage variation function；Reference voltage changes function
The function changed over time for reference voltage.
In addition, computing module 112 is also used to, the mutation that the first modulated signal and jump signal generation module 108 are exported
Signal summation, obtains the second modulated signal；
Wherein, jump signal based in modulation module 110 triangle wave amplitude and preset reference voltage parameter generate.
Modulation module 110 is used for, and first control signal is generated according to the second modulated signal, so that voltage control module 102
Temporarily drop voltage, which is treated, according to first control signal carries out voltage adjustment.
The embodiment of the invention provides a kind of voltage dip generators, comprising: voltage control module, reference voltage generate mould
Block, signal conditioning module, jump signal generation module, modulation module and computing module；Computing module is used for, and controls mould to voltage
It is poor that the current reference voltage to temporarily drop voltage and the output of reference voltage generation module of block output is made, and will make poor first obtained
Error signal is sent to signal conditioning module, so that processing is adjusted to first error signal in signal conditioning module, obtains
One modulated signal；Wherein, current reference voltage is determined based on preset reference voltage variation function；Reference voltage changes letter
Number is the function that reference voltage changes over time；Computing module is also used to, to the first modulated signal and jump signal generation module
The jump signal of output is summed, and the second modulated signal is obtained；Jump signal is based on the triangle wave amplitude in modulation module and presets
Reference voltage parameter generate；Modulation module generates first control signal according to the second modulated signal, so that voltage control module
Temporarily drop voltage, which is treated, according to first control signal carries out voltage adjustment.Aforesaid way provided in an embodiment of the present invention passes through signal tune
The jump signal that reason module and jump signal generation module generate is treated temporarily drop voltage and is handled, the will obtained after processing
The modulated module of two modulated signals is converted to control signal, further according to control signal to temporary drop voltage adjustment, compared to existing skill
In art in such a way that PI is controlled to voltage progress proportion adjustment, according to reference voltage parameter and the triangle wave amplitude of modulation module
It joined jump signal, can quickly control transient state switching when voltage dip, effectively promote the effect of voltage dip.
Specifically, above-mentioned signal conditioning module may include pi regulator.Before above-mentioned reference voltage parameter includes voltage dip
Moment and phase value occur for voltage magnitude, voltage dip after voltage magnitude, voltage dip.When practical application, reference voltage parameter
It can be customized by users.The interface interacted with user is preset, in voltage dip generator such as to pass through the interface
The reference voltage parameter of user's input.
Above-mentioned modulation module includes triangular-wave generator and comparator；Triangular-wave generator is used for, and generates triangular signal；
Comparator is used for, and converts first control signal for the second modulated signal according to triangular signal.
When practical application, the mode of numerical model analysis can be used, second control signal is converted into analog signal through DA, with three
The triangular wave that angle wave producer generates, which is compared, makees bad student's pwm control signal.
Based on this, reference voltage generation module is used for, and is generated reference voltage according to reference voltage parameter and is changed function.Mutation
Signal generation module is used for:
(1) according to phase value, the type of jump signal is determined；Wherein, the type of jump signal includes impact signal and dashes forward
Cut signal.
When it is implemented, the demand of the temporary drop voltage magnitude of test equipment can be treated according to user, namely defeated according to user
The reference voltage parameter entered, the reference voltage variation function based on reference voltage generation compare instantaneous value and voltage before voltage dip
The size relation of instantaneous value after temporarily dropping, if temporarily instantaneous voltage is greater than instantaneous voltage before temporarily drop after drop, it is determined that mutation letter
Number type be impact signal；Otherwise, it determines the type of jump signal is anticlimax signal.
(2) according to the triangle wave amplitude in modulation module, the amplitude of jump signal is determined.
When it is implemented, the positive peak of above-mentioned triangular wave carrier can be determined as to the amplitude of impact signal, by above-mentioned triangle
The negative peak of wave carrier signal is determined as the amplitude of anticlimax instruction.Such setting can be such that voltage dip generator makees in jump signal
With in the time with maximum capacity output voltage.
(3) according to voltage magnitude after voltage magnitude, voltage dip before voltage dip, the effect duration of jump signal is determined,
Jump signal cancels at the end of acting on duration.
It, can be first according to voltage amplitude after voltage magnitude, voltage dip before voltage dip in a kind of optional embodiment
Value, determines that depth intervals temporarily drop in target voltage；Then lookup and mesh from preset voltage dip depth intervals-action time table
The voltage dip depth intervals corresponding interacting goals time is marked, the interacting goals time is determined as to the effect duration of jump signal.
Above-mentioned voltage dip depth intervals-action time table can be determined according to actual experimental conditions, be it is convenient to carry out,
The embodiment of the present invention there is provided herein a kind of voltage dip depth intervals-action time table, as shown in table 1 below:
Table 1
| Voltage dip depth intervals | Jump signal action time (Ts is switch periods) |
| 0.9p.u.-0.8p.u. | 0.05*Ts-0.1*Ts |
| 0.8p.u.-0.6p.u. | 0.1*Ts-0.15*Ts |
| 0.6p.u.-0.5p.u. | 0.15*Ts-0.2*Ts |
| 0.5p.u.-0.3p.u. | 0.2*Ts-0.25*Ts |
| 0.3p.u.-0.2p.u. | 0.25*Ts-0.3*Ts |
| 0.2p.u.-0.1p.u. | 0.3*Ts-0.35*Ts |
Wherein, voltage dip depth intervals are marked using per unit value, the initial voltage mark of voltage control module output
Value is labeled as 1, and voltage dip depth intervals indicate in reference voltage parameter before voltage dip voltage after voltage magnitude, voltage dip
Voltage dip depth intervals corresponding to amplitude；Switch periods Ts is true by the switch block institute of inverter in voltage control module
It is fixed, it can be arranged according to practical application, herein without repeating.
(4) moment generation jump signal occurs for the type based on jump signal, amplitude, effect duration and voltage dip.
Further, above-mentioned the embodiment of the invention also provides a kind of specific structure of voltage control module to be convenient to carry out
Voltage control module includes: sequentially connected DC power supply, inverter, transformer and filter circuit.Wherein, when practical application,
Filter circuit can be LC filter circuit；Inverter includes: H bridge inverter.
Voltage control module is also used to that the switching device in inverter is adjusted according to first control signal, so that directly
The voltage in galvanic electricity source after inverter, transformer and filter circuit by being converted into temporarily drop voltage.
Further, it is contemplated that there may be oscillations in practical application circuit, to avoid circuit oscillation from influencing above-mentioned signal
Correct transmitting, above-mentioned voltage dip generator further include: inductive current detection module.The inductive current detection module respectively with LC
Filter circuit is connected with computing module；Inductive current detection module is used for, and detects the inductive current of LC filter circuit；Computing module
Be also used to, by inductive current multiplied by feedback factor after, with the second modulated signal make it is poor, obtain third modulated signal；Modulation module
Second control signal is generated according to third modulated signal, so that voltage control module treats temporarily drop voltage according to second control signal
Carry out voltage adjustment.
When it is implemented, can also above-mentioned first modulated signal and jump signal sum to obtain the second modulated signal it
Before, inductive current is first first deleted from the first modulated signal multiplied by the value of feedback factor, namely believed with the first modulation after deleting
Number sum to obtain the second new modulated signal with jump signal, subsequent brew module generates new according to the second new modulated signal
First control signal so that voltage control module according to new first control signal treat temporarily drop voltage carry out voltage adjustment.
For the structure convenient for further understanding above-mentioned voltage dip generator, the embodiment of the invention also provides a kind of voltages
Temporarily drop generator circuit diagram, as shown in Fig. 2, illustrated in figure voltage dip generator main circuit part namely
The specific structure of above-mentioned voltage control module, including DC power supply DC, inverter are (as shown in Fig. 2, include two concatenated H bridges
Inverter, respectively H1 and H2), transformer (TR1 being respectively connected with H1 and the TR2 being connected with H2) and by inductance L and
The LC filter circuit of capacitor Co composition；U1 is indicated to temporarily drop voltage, U in Fig. 2refExpression is given birth to by reference voltage generation module
At reference voltage variation function determined by current reference voltage,Indicate computing module, computing module is by U1 and UrefMake
Difference obtains first error signal, obtains the first modulated signal through PI (that is, above-mentioned signal conditioning module), computing module first will
First modulated signal with multiplied by feedback factor HilInductive current makees the first modulated signal after difference is deleted, then by jump signal
Generation module generate jump signal with delete after the first modulated signal make and, obtain the second new modulated signal, and will be new
The second modulated signal be sent to modulation module so that modulation module generates the first new control according to the second new modulated signal
Signal (that is, control signal shown in Fig. 2) voltage control module is according to the control signal to the switch portion in its inverter
Part (namely H bridge shown in Fig. 2) is adjusted, and with adjustment output to temporarily drop voltage, then repeats above-mentioned process, until electricity
Pressure control module output the fluctuation range to temporarily drop voltage be in preset fluctuation range, namely to temporarily drop voltage and currently
Difference between reference voltage is in error steady-state range.In circuit diagram shown in Fig. 2, when the work for reaching jump signal
After duration, the modulated signal being sent in modulation module is persistently controlled by PI, DC power supply DC can be made using jump signal
Voltage be quickly temporarily down to temporarily dropped in reference voltage parameter after voltage magnitude approach and stable voltage, can also add
The transient state handoff procedure of fast voltage.
In this regard, as shown in figure 3, the artificial circuit is illustrated the embodiment of the invention also provides a kind of artificial circuit schematic diagram
Scheme corresponding with foregoing circuit schematic diagram, wherein the modulation module in Fig. 3 is divided into modulation module-A and modulation module-B two
Point, modulation module-A is used to control signal being transmitted to the H1 in voltage control module inverter to control the switch block of H1,
Modulation module-B is used to control signal being transmitted to the H2 in voltage control module inverter to control the switch block of H2.It is based on
Above embodiment, the initial voltage virtual value temporarily to drop preceding voltage control module output mark it with per unit value for 220V
Be illustrated for being 1 to the effect of aforesaid way: it is at a time (namely preceding to learn that user wants according to reference voltage parameter
State voltage dip and the moment occur) it is temporarily down to 0.2.p.u (namely voltage magnitude after the temporary drop of user's input), jump signal is raw
It can determine that the action time of the jump signal is 0.3 switch periods by searching for above-mentioned table 1 at module.As shown in Figure 4
A kind of simulation waveform schematic diagram it is found that specifically, illustrated in Fig. 4 the waveform of 1- reference voltage, 2- PI control under it is defeated
The waveform of voltage (output voltage of voltage control module) and 3- addition mutation instruct the defeated of (namely above-mentioned jump signal) out
The waveform of voltage out.The output voltage of the anticlimax signal of moment additional 0.3 switch periods occurs compared to existing skill in temporary drop
The speed of transient state switching can only be accelerated in art in such a way that PI controls output voltage, and reduce the shake of transient state handoff procedure
It swings.
Corresponding above-mentioned voltage dip generator, the embodiment of the invention also provides a kind of voltage dip control system 500, ginsengs
See Fig. 5, which includes: test equipment 502 and such as above-mentioned voltage dip generator 504；Test equipment 502 and voltage dip
Generator 504 is connected, when it is implemented, the voltage control module in voltage dip generator 504 and test equipment 502 connect
It connects, finally stable output voltage is transmitted to test equipment by voltage control module.
It should be appreciated that Fig. 5 is only a kind of structural schematic diagram of voltage dip control system, rather than voltage dip controls
The exclusive architecture of system can also include in actual use other function structure, specifically with reality in addition to structure shown in fig. 5
Subject to the service condition of border, it is not limited by the embodiments of the present invention.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "inner", "outside", " side ", "bottom"
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention and simplification retouch
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.In addition, term " first ", " second ", " third " are used for description purposes only, without
It can be interpreted as indication or suggestion relative importance.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of voltage dip generator characterized by comprising voltage control module, reference voltage generation module, signal tune
Manage module, jump signal generation module, modulation module and computing module；
The computing module is used for, and generates mould to temporarily drop voltage and the reference voltage to voltage control module output
It is poor that the current reference voltage of block output is made, and will make the first error signal that difference obtains and is sent to the signal conditioning module, so that
Processing is adjusted to the first error signal in the signal conditioning module, obtains the first modulated signal；Wherein, described current
Reference voltage is determined based on preset reference voltage variation function；Reference voltage variation function be reference voltage at any time
Between the function that changes；
The computing module is also used to, the jump signal exported to first modulated signal and the jump signal generation module
Summation, obtains the second modulated signal；The jump signal based in the modulation module triangle wave amplitude and preset reference
Voltage parameter generates；
The modulation module is used for, and generates first control signal according to second modulated signal, so that the voltage controls mould
Root tuber carries out voltage adjustment to temporarily drop voltage to described according to the first control signal.
2. voltage dip generator according to claim 1, which is characterized in that the reference voltage parameter includes that voltage is temporary
Moment and phase value occur for voltage magnitude, voltage dip after voltage magnitude, voltage dip before dropping；
The jump signal generation module is used for:
According to the phase value, the type of the jump signal is determined；Wherein, the type of the jump signal includes impact signal
With anticlimax signal；
According to the triangle wave amplitude in the modulation module, the amplitude of the jump signal is determined；
According to voltage magnitude after voltage magnitude, voltage dip before the voltage dip, the effect duration of the jump signal is determined；
Moment generation institute occurs for type, the amplitude, the effect duration and the voltage dip based on the jump signal
State jump signal.
3. voltage dip generator according to claim 2, which is characterized in that the jump signal generation module is also used
In:
According to voltage magnitude after voltage magnitude, voltage dip before the voltage dip, determine that depth intervals temporarily drop in target voltage；
Search that with the target voltage temporarily to drop depth intervals corresponding from preset voltage dip depth intervals-action time table
The interacting goals time is determined as the effect duration of the jump signal by the interacting goals time.
4. voltage dip generator according to claim 2, which is characterized in that the reference voltage generation module is used for,
The reference voltage, which is generated, according to the reference voltage parameter changes function.
5. voltage dip generator according to claim 1, which is characterized in that the modulation module includes triangular wave
Device and comparator；
The triangular-wave generator is used for, and generates triangular signal；
The comparator is used for, and is converted first control for second modulated signal according to the triangular signal and is believed
Number.
6. voltage dip generator according to claim 1, which is characterized in that the voltage control module includes: successively
DC power supply, inverter, transformer and the filter circuit of connection；
The voltage control module is also used to adjust the switching device in the inverter according to the first control signal
Section, so that the voltage of the DC power supply is by being converted into institute after the inverter, the transformer and the filter circuit
It states to temporarily drop voltage.
7. voltage dip generator according to claim 6, which is characterized in that the filter circuit is LC filter circuit；
The inverter includes H bridge inverter.
8. voltage dip generator according to claim 7, which is characterized in that the voltage dip generator further include:
Inductive current detection module；
The inductive current detection module is connect with the LC filter circuit and the computing module respectively；
The inductive current detection module is used for, and detects the inductive current of the LC filter circuit；
The computing module is also used to, by the inductive current multiplied by feedback factor after, with second modulated signal make it is poor, obtain
To third modulated signal；
The modulation module according to the third modulated signal generate second control signal so that the voltage control module according to
The second control signal carries out voltage adjustment to temporarily drop voltage to described.
9. voltage dip generator according to claim 1, which is characterized in that the signal conditioning module includes that PI is adjusted
Device.
10. a kind of voltage dip control system characterized by comprising test equipment and as described in claim any one of 1-9
Voltage dip generator；
Voltage control module in the voltage dip generator is connect with the test equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910079256.9A CN109839524B (en) | 2019-01-25 | 2019-01-25 | Voltage sag generator and voltage sag control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910079256.9A CN109839524B (en) | 2019-01-25 | 2019-01-25 | Voltage sag generator and voltage sag control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109839524A true CN109839524A (en) | 2019-06-04 |
| CN109839524B CN109839524B (en) | 2020-07-03 |
Family
ID=66884252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910079256.9A Active CN109839524B (en) | 2019-01-25 | 2019-01-25 | Voltage sag generator and voltage sag control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109839524B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111060726A (en) * | 2019-12-30 | 2020-04-24 | 国网陕西省电力公司电力科学研究院 | Voltage sag generation method and device |
| CN112769142A (en) * | 2020-12-31 | 2021-05-07 | 广东电网有限责任公司广州供电局 | Voltage sag control method, device, control equipment and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1249916A1 (en) * | 2001-04-09 | 2002-10-16 | Abb Research Ltd. | Operating method and system for voltage drop compensation |
| CN101877543A (en) * | 2009-04-30 | 2010-11-03 | 艾默生网络能源系统北美公司 | Switching power supply control method and device |
| CN204258307U (en) * | 2014-11-12 | 2015-04-08 | 广东电网有限责任公司东莞供电局 | Control circuit of voltage sag generator |
| CN204928616U (en) * | 2015-08-19 | 2015-12-30 | 南方电网科学研究院有限责任公司 | Alternating voltage generating device for voltage sag test |
| CN106451410A (en) * | 2016-11-16 | 2017-02-22 | 上海交通大学 | Direct current dynamic voltage restorer and restoring method |
-
2019
- 2019-01-25 CN CN201910079256.9A patent/CN109839524B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1249916A1 (en) * | 2001-04-09 | 2002-10-16 | Abb Research Ltd. | Operating method and system for voltage drop compensation |
| CN101877543A (en) * | 2009-04-30 | 2010-11-03 | 艾默生网络能源系统北美公司 | Switching power supply control method and device |
| CN204258307U (en) * | 2014-11-12 | 2015-04-08 | 广东电网有限责任公司东莞供电局 | Control circuit of voltage sag generator |
| CN204928616U (en) * | 2015-08-19 | 2015-12-30 | 南方电网科学研究院有限责任公司 | Alternating voltage generating device for voltage sag test |
| CN106451410A (en) * | 2016-11-16 | 2017-02-22 | 上海交通大学 | Direct current dynamic voltage restorer and restoring method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111060726A (en) * | 2019-12-30 | 2020-04-24 | 国网陕西省电力公司电力科学研究院 | Voltage sag generation method and device |
| CN112769142A (en) * | 2020-12-31 | 2021-05-07 | 广东电网有限责任公司广州供电局 | Voltage sag control method, device, control equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109839524B (en) | 2020-07-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104917413A (en) | Inverting apparatus and control method thereof | |
| CN101483345B (en) | Control method for photovoltaic grid connection inverter with wide input range | |
| CN104834345B (en) | The maximum power tracing method of magnetic resonance type wireless electric energy transmission under water | |
| CN105322766A (en) | Constant ON-time or constant OFF-time switching power converter and control circuit thereof | |
| CN103856062A (en) | Double-loop control circuit of phase-shifted full-bridge synchronous rectification circuit | |
| CN103812135A (en) | Control method for improving adaptability of LCL type grid-connected inverter for weak grid | |
| CN106130077A (en) | Electric automobile compensation of power network voltage method based on virtual synchronous electromotor algorithm | |
| CN111679582B (en) | Finite time backstepping control system and method for front-end rectifier of bidirectional charger | |
| CN109839524A (en) | Voltage dip generator and voltage dip control system | |
| CN103178718A (en) | Digital-control constant-power DC/DC converter | |
| CN109462339A (en) | Impedance matching methods based on circuit duty ratio | |
| CN106300964B (en) | Independent charge and discharge sequential single-inductance double-output switch converters method for controlling frequency conversion and its device | |
| CN104259005B (en) | High-frequency and high-voltage power supply controller for electrostatic dust collection and control method | |
| CN108809072A (en) | Phase compensating method suitable for circuit of power factor correction | |
| CN109104095A (en) | Three Port Translation devices half switch the predicted current phase-shifting control method of periodic sampling | |
| CN101866155B (en) | Variable frequency square-wave generator | |
| CN201967214U (en) | Constant current driving circuit for LED (light-emitting diode) lamp | |
| CN107480348B (en) | Power interface circuit and digital-analog hybrid simulation system | |
| CN104901404A (en) | Charging circuit and output control method | |
| CN107465333A (en) | A kind of power supply circuit and its control method | |
| CN104682687B (en) | Soft start-based voltage regulating circuit and soft start method thereof | |
| CN103607104A (en) | Sine wave modulation circuit and sine wave modulation method | |
| CN207218515U (en) | A kind of power supply circuit | |
| CN206977316U (en) | A kind of control device of LCC resonance DC DC converters | |
| CN203340031U (en) | Power frequency inductance regulation resonance device |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |