CN108152572A - The current Hall detection method and device of a kind of grid-connected converter - Google Patents
The current Hall detection method and device of a kind of grid-connected converter Download PDFInfo
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- CN108152572A CN108152572A CN201711477222.2A CN201711477222A CN108152572A CN 108152572 A CN108152572 A CN 108152572A CN 201711477222 A CN201711477222 A CN 201711477222A CN 108152572 A CN108152572 A CN 108152572A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/28—Arrangements for measuring currents or voltages or for indicating presence or sign thereof adapted for measuring in circuits having distributed constants
Abstract
The invention discloses the current Hall detection method and device of a kind of grid-connected converter, this method includes：Obtain output current signal and output voltage signal of the grid-connected converter during buffering is powered on；Wherein, output current signal and output voltage signal are digital signal；Calculate the corresponding phase difference of same period of the first preset quantity in output current signal and output voltage signal；The current Hall of grid-connected converter is detected according to the phase difference of the first preset quantity；Output voltage and output current of the present invention by using grid-connected converter during buffering is powered on, calculate output current and output voltage phase relation, whether the current Hall for being accurately judged to grid-connected converter is abnormal, so as to effectively evade in advance by the extremely caused failure of current Hall and risk.
Description
Technical field
The present invention relates to power electronics field, the current Hall detection method of more particularly to a kind of grid-connected converter and
Device.
Background technology
With the development of modern society's science and technology, grid-connected converter equipment, such as PWM rectifier are required in many application scenarios
Deng, be required for grid side install current Hall, ensure the control accuracy to output current.
In the prior art, if there are the current Hall installation abnormal conditions such as reverse phase or loose contact, due to grid-connected converter
The current Hall installation site of equipment is grid side, after centainly grid-connected converter being needed to run in itself, electric current could occurs and go forward side by side
Row analysis, and grid-connected converter can not note abnormalities when not running, and after normal operation, then it will appear the event such as overcurrent
Barrier；It can only gradually be judged by the abnormal current of outside monitoring, due to causing the situation of current anomaly many during operation, such as controlled
The directions such as algorithm processed, load-side, hardware detection are required for investigating, it is difficult to accurate positioning.Therefore, one kind how is provided in grid-connected change
The whether abnormal detection method of current Hall just can be accurately obtained before stream device operation, predicts and avoids risk in advance, be urgency now
It need to solve the problems, such as.
Invention content
The object of the present invention is to provide the current Hall detection method and device of a kind of grid-connected converter, with by calculating
The mutual phase relation of input voltage and input current during electricity buffering determines whether current Hall is abnormal, evades in advance by electric current
The extremely caused failure of Hall and risk.
In order to solve the above technical problems, the present invention provides a kind of current Hall detection method of grid-connected converter, including：
Obtain output current signal and output voltage signal of the grid-connected converter during buffering is powered on；Wherein, it is described defeated
It is digital signal to go out current signal and the output voltage signal；
The same period for calculating the first preset quantity in the output current signal and the output voltage signal is respectively right
The phase difference answered；
The current Hall of the grid-connected converter is detected according to the phase difference of the first preset quantity.
Optionally, the identical week for calculating the first preset quantity of the output current signal and the output voltage signal
Phase corresponding phase difference, including：
It is default according to second in the same period each in the output current signal and the output voltage signal
The output current digital signal of quantity and output voltage digital signal calculate each phase using default correlation method calculation formula
The corresponding phase difference with the period.
Optionally, the output current signal and output voltage signal for obtaining grid-connected converter during buffering is powered on,
Including：
Detect whether the grid-connected converter starts power up buffering；
The output current signal and the output voltage signal are obtained if so, being acquired using AD devices.
Optionally, when the first preset quantity is 1, the phase difference according to the first preset quantity is to described grid-connected
The current Hall of current transformer is detected, including：
Judge whether the phase difference is more than or equal to 0 ° and less than or equal to 60 °；
If so, determine that the current Hall of the grid-connected converter is errorless；
If not, it is determined that the installation of the current Hall of the grid-connected converter is reversed.
Optionally, it is described according to the first preset quantity when the first preset quantity is the positive integer more than or equal to 2
Phase difference is detected the current Hall of the grid-connected converter, including：
Judge whether the phase difference of the first preset quantity is all higher than being equal to 0 ° and less than or equal to 60 °；
If so, determine that the current Hall of the grid-connected converter is errorless；
If it is not, whether the difference between then judging the phase difference of the first preset quantity is in the first preset range；
If the difference between the phase difference of the first preset quantity is in the first preset range, it is determined that the grid-connected change
The installation for flowing the current Hall of device is reversed；
If the difference between the phase difference of the first preset quantity is not in the first preset range, and the electricity of corresponding acquisition
The current value of stream Hall is in the second preset range, it is determined that the current Hall or rear class sample circuit of the grid-connected converter go out
It is now abnormal.
Optionally, the grid-connected converter is specially PWM rectifier.
In addition, the present invention also provides a kind of current Hall detection device of grid-connected converter, including：
Acquisition module, for obtaining output current signal and output voltage letter of the grid-connected converter during buffering is powered on
Number；Wherein, the output current signal and the output voltage signal are digital signal；
Computing module, for calculating the phase of the first preset quantity in the output current signal and the output voltage signal
With period corresponding phase difference；
Detection module, for the phase difference according to the first preset quantity to the current Hall of the grid-connected converter into
Row detection.
Optionally, the computing module, including：
Computational submodule, for according to the identical week each in the output current signal and the output voltage signal
The output current digital signal of the second preset quantity in phase and output voltage digital signal utilize default correlation method calculation formula
Calculate the corresponding phase difference of each same period.
Optionally, when the first preset quantity is 1, the detection module, including：
First detection sub-module, for judging whether the phase difference is more than or equal to 0 ° and less than or equal to 60 °；If so,
Determine that the current Hall of the grid-connected converter is errorless；If not, it is determined that the installation of the current Hall of the grid-connected converter is anti-
To.
Optionally, when the first preset quantity is the positive integer more than or equal to 2, the detection module, including：
Whether the second detection sub-module, the phase difference for judging the first preset quantity are all higher than being equal to 0 ° and be less than
Equal to 60 °；If so, determine that the current Hall of the grid-connected converter is errorless；If it is not, it is then opened to the transmission of third detection sub-module
Dynamic signal；
Third detection sub-module, for judging whether the difference between the phase difference of the first preset quantity is pre- first
If in range；If so, determine that the installation of the current Hall of the grid-connected converter is reversed；If it is not, the and corresponding electric current acquired
The current value of Hall is in the second preset range, it is determined that the current Hall or rear class sample circuit of the grid-connected converter occur
It is abnormal.
A kind of current Hall detection method of grid-connected converter provided by the present invention, including：Grid-connected converter is obtained to exist
Power on the output current signal and output voltage signal during buffering；Wherein, output current signal and output voltage signal are
Digital signal；Calculate the corresponding phase of same period of the first preset quantity in output current signal and output voltage signal
Difference；The current Hall of grid-connected converter is detected according to the phase difference of the first preset quantity；
As it can be seen that output voltage and output current of the present invention by using grid-connected converter during buffering is powered on, calculate
Output current and output voltage phase relation, whether the current Hall for being accurately judged to grid-connected converter is abnormal, so as to have
Effect is evaded in advance by the extremely caused failure of current Hall and risk.In addition, the present invention also provides a kind of grid-connected converters
Current Hall detection device, equally with above-mentioned advantageous effect.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
The flow chart of the current Hall detection method of a kind of grid-connected converter that Fig. 1 is provided by the embodiment of the present invention；
The three phase full bridge of the current Hall detection method of a kind of grid-connected converter that Fig. 2 is provided by the embodiment of the present invention
PWM rectifier topology diagram；
The three phase full bridge of the current Hall detection method of a kind of grid-connected converter that Fig. 3 is provided by the embodiment of the present invention
PWM rectifier powers on the topology diagram during buffering；
Fig. 4 is set by the three-phase grid of the current Hall detection method of a kind of grid-connected converter that the embodiment of the present invention provides
Standby input voltage and the schematic diagram of input current phase relation；
The PWM rectifier of the current Hall detection method of a kind of grid-connected converter that Fig. 5 is provided by the embodiment of the present invention
Power on the schematic diagram of output current and output voltage relationship during buffering；
A kind of structure chart of the current Hall detection device for grid-connected converter that Fig. 6 is provided by the embodiment of the present invention.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
All other embodiments obtained without making creative work shall fall within the protection scope of the present invention.
It please refers to Fig.1, the current Hall detection method of a kind of grid-connected converter that Fig. 1 is provided by the embodiment of the present invention
Flow chart.This method can include：
Step 101：Obtain output current signal and output voltage signal of the grid-connected converter during buffering is powered on；Its
In, output current signal and output voltage signal are digital signal.
It is understood that the purpose of the present embodiment can be by using correlation method calculate grid-connected converter power on it is slow
Whether output current and output voltage phase relation during punching, the current Hall for being accurately judged to grid-connected converter are abnormal.It is right
The concrete mode of output current signal and output voltage signal of the grid-connected converter during buffering is powered on is obtained in this step,
It can voluntarily be set according to practical scene and user demand by designer, can such as detect that powering on for grid-connected converter is slow
When washing the beginning open, the digital signal for obtaining output current and output voltage is acquired using AD devices；User can also directly be received to lead to
Cross the output current of other devices acquisition and the digital signal of output voltage.As long as can obtain grid-connected converter is powering on buffering
The output current of period and the digital signal of output voltage, the present embodiment do not do this any restrictions.
It should be noted that the concrete type of the grid-connected converter in the present embodiment, can by designer or user from
Row setting, such as can be three phase full bridge PWM rectifier as shown in Figure 2, or other kinds of grid-connected converter, as long as
The method that can be provided through this embodiment determines whether the current Hall of the grid-connected converter of the type is abnormal, the present embodiment
Any restrictions are not done to this.
Specifically, output current of the grid-connected converter during buffering is powered on is calculated by using correlation method in the present embodiment
With output voltage phase relation, the whether abnormal principle of current Hall for being accurately judged to grid-connected converter can be as follows：
By taking three phase full bridge PWM rectifier shown in Fig. 2 as an example, when carrying out switch module control, with DSP (Digital Signal
Processing, Digital Signal Processing) as the primary control for controlling pwm signal, pass through internal pulse-width modulation (ePWM) mould
Block exports corresponding pwm signal, drives the turn-on and turn-off of three groups of switching tubes in the PWM rectifier；The PWM rectifier is upper
During electricity buffering, switch module is not controlled, is illustrated as three-phase uncontrollable rectifier topology, switching tube is failure to actuate, only with anti-
Six pulse wave rectifiers are carried out to diode, equivalent topologies are illustrated in fig. 3 shown below.Buffer resistance is in rectifier front-end circuit in Fig. 3
In, RC charge circuits are formed with capacitance, so as to achieve the purpose that reduce the dash current of powered on moment.
By taking R, S phase in Fig. 3 as an example, after buffering is powered on, line voltage URSAbsolute value than other two line voltages all
When big, the diode of R, S phase is passively connected, and line voltage and corresponding phase current relationship are as shown in Figure 4 at this time：When RS line voltages are
Just, when and all bigger than other two line voltages, turn-on angle is reached at this time, due to R, S phase D1 and D4 diode current flow, line voltage URSTo
Capacitance C charges, and current direction is just, after the turn-on angle for reaching next line voltage, since afterflow acts on, current direction is still at this time
Just.And when RS line voltages are negative, after reaching turn-on angle, line voltage URS is by diode D2 and D3 to capacitor charging, electric current side
To be negative, after the turn-on angle for reaching next line voltage, since afterflow acts on, current direction is still negative；Since the buffering for holding resistance is made
With when powering on buffering, electric current is larger, and sine degree is preferable, as shown in Figure 5：It can be seen that from I area~V areas, power on buffering electricity
It flows sufficiently large, can ensure that current Hall accurately samples current value；Secondly, from waveform it can also be seen that output current and output electricity
It presses substantially in phase.
Step 102：The same period for calculating the first preset quantity in output current signal and output voltage signal is respectively right
The phase difference answered.
Wherein, since during buffering is powered on, current waveform sine degree is preferable, it is believed that it is the sinusoidal component of Noise,
And output line voltage is standard sine amount, therefore output current and the phase difference of output voltage when can be calculated normal.This
Step can by acquisition power on buffering during output current signal and output voltage signal, calculate output current signal and
Output voltage signal is in the corresponding phase difference of same period.The particular number of the first preset quantity in this step is set,
It is, the quantity and this step of the same period in the output current signal and output voltage signal that are obtained in step 101
In the quantity of phase difference that is calculated, can by designer according in step 103 to the current Hall of grid-connected converter into
The quantity correspondence of phase difference needed for row detection is configured, and the present embodiment does not do this any restrictions.
Specifically, for the phase for calculating the first preset quantity in output current signal and output voltage signal in this step
With the specific calculation of period corresponding phase difference, can by designer according to practical scene and user demand voluntarily
Setting, can such as be calculated by correlation method, also just be said, this step can be according in output current signal and output voltage signal
The output current digital signal of the second preset quantity and output voltage digital signal in each same period, utilize default correlation
Method calculation formula calculates the corresponding phase difference of each same period；It can also be calculated by other methods, as long as can calculate defeated
Go out the corresponding phase difference of same period of current signal and output voltage signal, the present embodiment does not do this any restrictions.
It is understood that when this step calculates phase difference by correlation method, output current digital signal and output voltage
Digital signal can be respectively the sampled point of the identical frequency in same period in output current signal and output voltage signal
Digital signal.It is, its purpose can be by default correlation method calculation formula, respectively to output current signal and output electricity
The digital signal of the sampled point of the same period of the first preset quantity is calculated in pressure signal, obtains the phase of the first preset quantity
With period corresponding output current and the phase difference of output voltage.
It should be noted that it is calculated in output current signal and output voltage signal using default correlation method calculation formula
The detailed process of the corresponding phase difference of same period of first preset quantity, the whole outputs that can have been obtained according to
Current signal and output voltage signal carry out the identical of the first preset quantity using default correlation method calculation formula respectively or successively
The calculating of period corresponding phase difference；Output current signal and output voltage letter can also be carried out during buffering is powered on
Number real-time gatherer process in, directly to the output current digital signal of the identical frequency in collected same period and output
Voltage digital signal is calculated, and after each pair of output current digital signal and output voltage digital signal calculate, is sentenced
Whether the disconnected corresponding phase difference of the same period calculates completion；If it is not, then continue to lower a pair of of output current digital signal and defeated
Go out voltage digital signal to be calculated；If so, mark is completed in the calculating for exporting the corresponding phase difference of the same period, to next
The phase difference of same period is calculated or is entered step 103.The present embodiment does not do this any restrictions.
Specifically, when calculating phase difference by correlation method, the particular content of correlation method calculation formula is preset, it can be by designing
Personnel are voluntarily set according to practical scene and user demand, such as can be speciallyWherein, Ixy(0)
For phase difference, k is the second preset quantity, and n is the integer for being less than or equal to k-1 more than or equal to 0, and x (n) believes for output current number
Number, y (n) is output voltage digital signal.
It is understood that correlation method is the cross-correlation function zero moment value of two same frequency sinusoidal signals and its phase difference is
The directly proportional principle of cosine obtains phase difference.Since noise signal is usually with useful signal correlation very little, this method has
Good noise inhibiting ability.
Assuming that there are two by the same frequency signal y (t) of noise pollution, y (t), its expression formula is：
In formula：A and B is respectively the amplitude of x (t) and y (t), Nx(t) and Ny(t) it is respectively that the noise of x (t) and y (t) is believed
Number.Have to carrying out related operation for x (t) and y (t)：
As τ=0：
Since noise and signal are almost uncorrelated, and it is also uncorrelated between noise, it can be obtained after integration：
The signal of actual treatment is the discrete point sequence after sampling, is accordingly that discrete formula can be：
In above formula：Quantity of the k for sampled point, that is, the second preset quantity.
Step 103：The current Hall of grid-connected converter is detected according to the phase difference of the first preset quantity.
Wherein, the current Hall of grid-connected converter is detected according to the phase difference of the first preset quantity in this step
Detailed process can voluntarily be set by designer according to practical scene and user demand, such as can be according to the phase being calculated
The quantity of potential difference is correspondingly arranged, such as when the first preset quantity is 1, it is, the method that the present embodiment is provided only needs to utilize
The corresponding phase difference of a same period in output current signal and output voltage signal is calculated in step 102, due to according to
Theory analysis, phase difference should be between 0~60 ° of threshold ranges, if more than this threshold range, then it represents that the installation of current Hall
Reversely.Therefore, this step can be to judge whether phase difference is more than or equal to 0 ° and less than or equal to 60 °；If so, determine grid-connected change
The current Hall for flowing device is errorless；If not, it is determined that the installation of the current Hall of grid-connected converter is reversed.
Corresponding, when the first preset quantity is the positive integer more than or equal to 2, this step can be specially：
Step 1031：Judge whether the phase difference of the first preset quantity is all higher than being equal to 0 ° and less than or equal to 60 °；If so,
Then determine that the current Hall of grid-connected converter is errorless；If it is not, then enter step 1032.
It is understood that the purpose of this step can be by judging in output current signal and output voltage signal the
The corresponding phase difference of same period of one preset quantity and the comparison of 0~60 ° of threshold range, determine the electric current of grid-connected converter suddenly
Whether you are errorless.
Step 1032：Judge the difference between the phase difference of the first preset quantity whether in the first preset range；If so,
Then determine that the installation of the current Hall of grid-connected converter is reversed；If it is not, and the current value of the current Hall of corresponding acquisition be in the
Two preset ranges, it is determined that the current Hall or rear class sample circuit of grid-connected converter occur abnormal.
Wherein, the difference between the phase difference of the first preset quantity in this step can be two adjacent phase differences
Difference, can by the difference between the phase difference of the first preset quantity with whether the judgement in the first preset range, determine
Whether the phase difference of the first preset quantity is fixed.The specific range of first preset range is set, it can be with A designer person certainly
When being set as 0 in row setting, such as the first preset range, then when the phase difference of only the first preset quantity is equal, first is default
Difference between the phase difference of quantity is in the first preset range.As long as when the difference between the phase difference of the first preset quantity exists
When in the first preset range, it can represent that the phase difference of the first preset quantity is fixed, the present embodiment is unrestricted to this.
It should be noted that when the phase difference of the first preset quantity is not fixed, this step can pass through corresponding acquisition
The current value of current Hall determines the current Hall of grid-connected converter or rear class sample circuit whether in the second preset range
Whether exception is occurred, it is, the phase difference when the first preset quantity is not fixed, and the correspondence period of the current Hall acquired
Current value is in the second preset range, then exception occur in the current Hall or rear class sample circuit for illustrating grid-connected converter.For
The specific range setting of second preset range, can voluntarily be set with A designer person, could be provided as 0, may be set to be 0 or so
Range, such as larger than -1 and less than 1 range.The present embodiment does not do this any restrictions.
It is understood that the purpose of this step can be the difference between the phase difference by judging the first preset quantity
It whether in the first preset range, determines whether the phase difference of the first preset quantity is fixed, if phase difference is fixed, illustrates grid-connected
The installation of the current Hall of current transformer is reversed；If phase difference is not fixed, and the current value of the current Hall of corresponding acquisition is in the
There is exception in two preset ranges, the then current Hall or rear class sample circuit for illustrating grid-connected converter.
In the present embodiment, output voltage and defeated of the embodiment of the present invention by using grid-connected converter during buffering is powered on
Go out electric current, calculate output current and output voltage phase relation, whether the current Hall for being accurately judged to grid-connected converter is abnormal,
So as to effectively evade in advance by the extremely caused failure of current Hall and risk.
Please refer to Fig. 6, the current Hall detection device of a kind of grid-connected converter that Fig. 6 is provided by the embodiment of the present invention
Structure chart.The device can include：
Acquisition module 100, for obtaining output current signal and output voltage of the grid-connected converter during buffering is powered on
Signal；Wherein, output current signal and output voltage signal are digital signal；
Computing module 200, for calculating the identical week of the first preset quantity in output current signal and output voltage signal
Phase corresponding phase difference；
Detection module 300 examines the current Hall of grid-connected converter for the phase difference according to the first preset quantity
It surveys.
Optionally, computing module 200 can include：
Computational submodule, for pre- according to second in same period each in output current signal and output voltage signal
If the output current digital signal of quantity and output voltage digital signal, calculated using default correlation method calculation formula each identical
Period corresponding phase difference.
Optionally, acquisition module 100 can include：
Detection sub-module is powered on, whether detection grid-connected converter starts power up buffering；If so, it is sent to acquisition submodule
Enabling signal；
Submodule is acquired, for obtaining output current signal and output voltage signal using the acquisition of AD devices.
Optionally, when the first preset quantity is 1, detection module 300 can include：
First detection sub-module, for judging whether phase difference is more than or equal to 0 ° and less than or equal to 60 °；If so, it determines
The current Hall of grid-connected converter is errorless；If not, it is determined that the installation of the current Hall of grid-connected converter is reversed.
Optionally, when the first preset quantity is the positive integer more than or equal to 2, detection module 300 can include：
Second detection sub-module 0 ° and is less than or equal to for judging whether the phase difference of the first preset quantity is all higher than being equal to
60°；If so, determine that the current Hall of grid-connected converter is errorless；If it is not, then enabling signal is sent to third detection sub-module；
Third detection sub-module, for judging the difference between the phase difference of the first preset quantity whether in the first default model
In enclosing；If so, determine that the installation of the current Hall of grid-connected converter is reversed；If it is not, and the current Hall of corresponding acquisition electricity
Flow valuve is in the second preset range, it is determined that the current Hall or rear class sample circuit of grid-connected converter occur abnormal.
Output voltage and output current of the embodiment of the present invention by using grid-connected converter during buffering is powered on, calculate
Output current and output voltage phase relation, whether the current Hall for being accurately judged to grid-connected converter is abnormal, so as to have
Effect is evaded in advance by the extremely caused failure of current Hall and risk.
Each embodiment is described by the way of progressive in specification, the highlights of each of the examples are with other realities
Apply the difference of example, just to refer each other for identical similar portion between each embodiment.For device disclosed in embodiment
Speech, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related part is referring to method part illustration
.
Professional further appreciates that, with reference to each exemplary unit of the embodiments described herein description
And algorithm steps, can be realized with the combination of electronic hardware, computer software or the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is performed actually with hardware or software mode, specific application and design constraint depending on technical solution.Profession
Technical staff can realize described function to each specific application using distinct methods, but this realization should not
Think beyond the scope of this invention.
It can directly be held with reference to the step of method or algorithm that the embodiments described herein describes 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 current Hall detection method and device of grid-connected converter provided by the present invention are described in detail above.
Specific case used herein is expounded the principle of the present invention and embodiment, and the explanation of above example is only used
In facilitating the understanding of the method and its core concept of the invention.It should be pointed out that for those skilled in the art,
Without departing from the principle of the present invention, can also to the present invention some improvement and modification can also be carried out, these improvement and modification
It falls into the protection domain of the claims in the present invention.
Claims (10)
1. a kind of current Hall detection method of grid-connected converter, which is characterized in that including：
Obtain output current signal and output voltage signal of the grid-connected converter during buffering is powered on；Wherein, the output electricity
It is digital signal to flow signal and the output voltage signal；
The same period for calculating the first preset quantity in the output current signal and the output voltage signal is corresponding
Phase difference；
The current Hall of the grid-connected converter is detected according to the phase difference of the first preset quantity.
2. the current Hall detection method of grid-connected converter according to claim 1, which is characterized in that described in the calculating
The corresponding phase difference of same period of the first preset quantity of output current signal and the output voltage signal, including：
According to the second preset quantity in the same period each in the output current signal and the output voltage signal
Output current digital signal and output voltage digital signal, default correlation method calculation formula is utilized to calculate each identical week
Phase corresponding phase difference.
3. the current Hall detection method of grid-connected converter according to claim 2, which is characterized in that the acquisition is grid-connected
Output current signal and output voltage signal of the current transformer during buffering is powered on, including：
Detect whether the grid-connected converter starts power up buffering；
The output current signal and the output voltage signal are obtained if so, being acquired using AD devices.
4. the current Hall detection method of grid-connected converter according to any one of claims 1 to 3, which is characterized in that when
When first preset quantity is 1, the phase difference according to the first preset quantity is to the current Hall of the grid-connected converter
It is detected, including：
Judge whether the phase difference is more than or equal to 0 ° and less than or equal to 60 °；
If so, determine that the current Hall of the grid-connected converter is errorless；
If not, it is determined that the installation of the current Hall of the grid-connected converter is reversed.
5. the current Hall detection method of grid-connected converter according to any one of claims 1 to 3, which is characterized in that when
When first preset quantity is the positive integer more than or equal to 2, the phase difference according to the first preset quantity is to described grid-connected
The current Hall of current transformer is detected, including：
Judge whether the phase difference of the first preset quantity is all higher than being equal to 0 ° and less than or equal to 60 °；
If so, determine that the current Hall of the grid-connected converter is errorless；
If it is not, whether the difference between then judging the phase difference of the first preset quantity is in the first preset range；
If the difference between the phase difference of the first preset quantity is in the first preset range, it is determined that the grid-connected converter
Current Hall installation it is reversed；
If the difference between the phase difference of the first preset quantity is not in the first preset range, and the electric current of corresponding acquisition is suddenly
Your current value is in the second preset range, it is determined that the current Hall or rear class sample circuit of the grid-connected converter occur different
Often.
6. the current Hall detection method of grid-connected converter according to claim 5, which is characterized in that the grid-connected converter
Implement body is PWM rectifier.
7. a kind of current Hall detection device of grid-connected converter, which is characterized in that including：
Acquisition module, for obtaining output current signal and output voltage signal of the grid-connected converter during buffering is powered on；Its
In, the output current signal and the output voltage signal are digital signal；
Computing module, for calculating the identical week of the first preset quantity in the output current signal and the output voltage signal
Phase corresponding phase difference；
Detection module examines the current Hall of the grid-connected converter for the phase difference according to the first preset quantity
It surveys.
8. the current Hall detection device of grid-connected converter according to claim 7, which is characterized in that the calculating mould
Block, including：
Computational submodule, for according in the same period each in the output current signal and the output voltage signal
The output current digital signal of the second preset quantity and output voltage digital signal, utilize default correlation method calculation formula calculate
Each corresponding phase difference of the same period.
9. the current Hall detection device of grid-connected converter according to claim 7 or 8, which is characterized in that when first pre-
If quantity is 1, the detection module, including：
First detection sub-module, for judging whether the phase difference is more than or equal to 0 ° and less than or equal to 60 °；If so, it determines
The current Hall of the grid-connected converter is errorless；If not, it is determined that the installation of the current Hall of the grid-connected converter is reversed.
10. the current Hall detection device of grid-connected converter according to claim 7 or 8, which is characterized in that when first pre-
If quantity is the positive integer more than or equal to 2, the detection module, including：
Whether the second detection sub-module, the phase difference for judging the first preset quantity are all higher than being equal to 0 ° and be less than or equal to
60°；If so, determine that the current Hall of the grid-connected converter is errorless；Start letter if it is not, then being sent to third detection sub-module
Number；
Third detection sub-module, for judging the difference between the phase difference of the first preset quantity whether in the first default model
In enclosing；If so, determine that the installation of the current Hall of the grid-connected converter is reversed；If it is not, the and corresponding current Hall acquired
Current value be in the second preset range, it is determined that the current Hall or rear class sample circuit of the grid-connected converter occur different
Often.
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