CN109697335A - For transformer from leakage inductance calculation method, device, equipment and storage medium - Google Patents
For transformer from leakage inductance calculation method, device, equipment and storage medium Download PDFInfo
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- CN109697335A CN109697335A CN201910042627.6A CN201910042627A CN109697335A CN 109697335 A CN109697335 A CN 109697335A CN 201910042627 A CN201910042627 A CN 201910042627A CN 109697335 A CN109697335 A CN 109697335A
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- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
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Abstract
The invention discloses a kind of for transformers from leakage inductance calculation method, solves the low-pressure side of transformer using this calculation method before the high-voltage winding side of transformer and low pressure winding side do not install iron core from leakage inductance and high-pressure side from leakage inductance.Before the winding of transformer is not inserted into iron core, by applying voltage in high-voltage winding side and low pressure winding side, so that the iron core of transformer is equivalent to saturation state, in the case where the iron core of transformer is equivalent to saturation state, to being measured from leakage inductance of transformer, calculate, so that calculated reduce from leakage inductance and transformer are actual from leakage inductance difference error is corresponding, correspondingly, the T-type Type Equivalent Circuit Model and actual transformer performance gap of the transformer of foundation are also smaller.In addition, the invention also discloses a kind of for transformers from leakage inductance computing device, equipment and storage medium, effect is as above.
Description
Technical field
The present invention relates to technical field of electric power, in particular to a kind of for transformer from leakage inductance calculation method, device, set
Standby and storage medium.
Background technique
Important component of the transformer as electric system, normal operation and performance of the electromagnetic property to electric system
It plays a crucial role, therefore, the mathematics or simulation model for constructing accurate description transformer transient characterisitics are to power train
It is vital that system, which carries out analysis,.
Currently, mainly having modeling method based on magnetic field for the Mathematical Modeling Methods of transformer, based on the modeling of circuit
Method and modeling method based on magnetic circuit, the T-type Type Equivalent Circuit Model that the method based on circuit is established is the mould being generally used
Type needs measuring from leakage inductance to transformer when establishing T-type Type Equivalent Circuit Model, to transformer from leakage inductance into
When row measurement, on the one hand, after the winding side insertion iron core of transformer, since environment influences, the iron core of transformer be can be only in not
Saturation state, it is corresponding, when can only also measure the iron core unsaturation of transformer from leakage inductance, but in iron core unsaturation due to
The problem of " big number eating decimal " so as to cause measure from leakage inductance and transformer it is actual from leakage inductance to differ error larger, cause to build
The T-type Type Equivalent Circuit Model of vertical transformer and actual transformer performance gap are larger.On the other hand, in the winding of transformer
After iron core is inserted into side, in order to make iron core reach saturation state, iron core can only be made by way of increasing steady-state current and voltage
Saturation, but this kind of mode is more demanding for experiment condition, is difficult to realize.
Summary of the invention
The purpose of the present invention is to provide a kind of being situated between from leakage inductance calculation method, device, equipment and storage for for transformer
Matter improves the precision from leakage inductance of calculated transformer.
To achieve the above object, the embodiment of the invention provides following technical solutions:
First, the embodiment of the invention provides a kind of for transformers from leakage inductance calculation method, in the high pressure of transformer
Winding side and low pressure winding side do not install before iron core using from leakage inductance calculation method solve transformer from leakage inductance, comprising:
Obtain the first high side voltage and corresponding first high voltage side current applied in the high-voltage winding side；
Utilize first high side voltage, first high voltage side current, magnetizing inductance and high-pressure side natural leak to be solved
The first equation is established in sense；
Obtain the low-pressure side voltage applied in the low pressure winding side and corresponding low-pressure side electric current；
It is built using the low-pressure side voltage, the low-pressure side electric current, the magnetizing inductance and low-pressure side to be solved from leakage inductance
Vertical second equation；
In the low pressure winding side short circuit, the second high side voltage and correspondence applied in the high-voltage winding side is obtained
The second high voltage side current；
Using second high side voltage, second high voltage side current, the high-pressure side to be solved from leakage inductance and institute
It states low-pressure side to be solved and establishes third equation from leakage inductance；
Low-pressure side to be solved described in first equation, the second equation described in simultaneous and the third equation solution is from leakage inductance
Per unit value and the high-pressure side to be solved from the per unit value of leakage inductance.
Optionally, in the per unit value for solving the low-pressure side to be solved from leakage inductance and the high-pressure side natural leak to be solved
After the per unit value of sense, further includes:
The transformation is established from the per unit value of leakage inductance and high-pressure side from the per unit value of leakage inductance using obtained low-pressure side is solved
The T-type Type Equivalent Circuit Model of device.
Optionally, the low-pressure side to be solved is from the per unit value of leakage inductance and the high-pressure side to be solved from the per unit value of leakage inductance
Solution procedure specifically:
Low-pressure side to be solved described in first equation, the second equation described in simultaneous and the third equation solution is from leakage inductance
With the high-pressure side to be solved from leakage inductance, low-pressure side is obtained from leakage inductance and high-pressure side from leakage inductance；
Determine the impedance reference value of the transformer；
The low-pressure side is calculated separately from the ratio of leakage inductance and the impedance reference value and the high-pressure side from leakage inductance and institute
State the ratio of impedance reference value, it is corresponding to obtain the low-pressure side from the per unit value of leakage inductance and the high-pressure side from the mark of leakage inductance
Value.
Optionally, in first high side voltage and corresponding first high pressure for obtaining and applying in the high-voltage winding side
After the electric current of side, further includes:
Judge whether first high voltage side current exceeds high-pressure side rated current, if so, carrying out the first early warning
So that target person adjusts first high side voltage；
It is corresponding, it is described obtain the low-pressure side voltage applied in the low pressure winding side and corresponding low-pressure side electric current it
Afterwards, further includes:
Judge whether the low-pressure side electric current exceeds low-pressure side rated current, if so, carry out the second early warning so that
The target person adjusts the low-pressure side voltage.
Optionally, in second high side voltage and corresponding second high pressure for obtaining and applying in the high-voltage winding side
After the electric current of side, further includes:
Judge whether second high voltage side current exceeds the high-pressure side rated current, if so, carrying out third early warning
It prompts so that the target person adjusts second high side voltage.
Second, the embodiment of the invention provides a kind of for transformers from leakage inductance computing device, in the high pressure of transformer
Winding side and low pressure winding side do not install before iron core using from leakage inductance computing device solve transformer from leakage inductance, comprising:
First obtains module, for obtaining the first high side voltage and corresponding first applied in the high-voltage winding side
High voltage side current；
First establishes module, for using first high side voltage, first high voltage side current, magnetizing inductance and
The first equation is established from leakage inductance in high-pressure side to be solved；
Second obtains module, for obtaining the low-pressure side voltage applied in the low pressure winding side and corresponding low-pressure side electricity
Stream；
Second establishes module, for utilizing the low-pressure side voltage, the low-pressure side electric current, the magnetizing inductance and wait ask
It solves low-pressure side and establishes second equation from leakage inductance；
Third obtains module, in the low pressure winding side short circuit, obtains the applied in the high-voltage winding side
Two high side voltages and corresponding second high voltage side current；
Third establishes module, for utilizing second high side voltage, second high voltage side current, described to be solved
Third equation is established from leakage inductance and the low-pressure side to be solved from leakage inductance in high-pressure side；
Solve module, for described in the first equation, the second equation described in simultaneous and the third equation solution wait ask
Low-pressure side is solved from the per unit value of leakage inductance and the high-pressure side to be solved from the per unit value of leakage inductance.
Optionally, further includes:
4th establishes module, for using solving obtained low-pressure side from the per unit value of leakage inductance and high-pressure side from the mark of leakage inductance
Value establishes the T-type Type Equivalent Circuit Model of the transformer.
Optionally, further includes:
First judgment module, for judging whether first high voltage side current exceeds high-pressure side rated current, if so,
Into the first cue module,
First cue module, for carrying out the first early warning so that target person adjusts the first high-pressure side electricity
Pressure；
Second judgment module, for judging whether the low-pressure side electric current exceeds low-pressure side rated current, if so, into
Second cue module；
Second cue module, for carrying out the second early warning so that target person adjusts the low-pressure side voltage.
Third calculates equipment from leakage inductance the embodiment of the invention provides a kind of for transformer, in the transformer
High-voltage winding and low pressure winding do not install before iron core using it is described from leakage inductance calculate equipment solve the transformer from leakage inductance,
Include:
Memory, for storing computer program；
Processor, for executing the computer program stored in the memory to realize that any of the above mentioned is used for
Transformer from leakage inductance calculation method the step of.
4th, the embodiment of the invention discloses a kind of computer readable storage medium, deposited on computer readable storage medium
Contain computer program, realized when computer program is executed by processor any for transformer as above from leakage inductance
The step of calculation method.
A kind of for transformer provided in an embodiment of the present invention from leakage inductance calculation method, in the high-voltage winding side of transformer
Apply the low-pressure side of this calculation method solution transformer from leakage inductance and high-pressure side natural leak before iron core is not installed with low pressure winding side
Sense specifically obtains the first high side voltage of high-voltage winding side and low pressure winding side, low-pressure side voltage and corresponding the respectively
One high voltage side current, low-pressure side electric current, and the second high voltage side current in low-pressure side short circuit, according to the excitation of transformer electricity
Feel the first equation of correspondence establishment high-voltage winding side, low pressure winding side second equation and the short circuit of low pressure winding side when third party
Journey, three equations of last simultaneous can solve low-pressure side to be solved from the per unit value of leakage inductance and high-pressure side to be solved from leakage inductance
Per unit value.Using this programme, before the winding side of transformer is not inserted into iron core, by being applied in high-voltage winding side and low pressure winding side
Making alive, so that the iron core of transformer is equivalent to saturation state, in the case where the iron core of transformer is equivalent to saturation state, to change
Depressor is calculated from leakage inductance, so that it is calculated actual from the corresponding reduction of leakage inductance difference error from leakage inductance and transformer,
Correspondingly, the T-type Type Equivalent Circuit Model and actual transformer performance gap of the transformer established are also smaller.In addition, of the invention
Embodiment also disclose a kind of for transformer from leakage inductance computing device, equipment and storage medium, effect is as above.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, 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
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of illustrating from leakage inductance calculation method process for for transformer that the first embodiment of the invention provides
Figure；
Fig. 2 is a kind of high-pressure side of the high-voltage winding side of transformer provided in an embodiment of the present invention from leakage inductance zero load principle
Figure；
Fig. 3 is a kind of low-pressure side of the low pressure winding side of transformer provided in an embodiment of the present invention from leakage inductance zero load principle
Figure；
When Fig. 4 is a kind of low pressure winding side short circuit of transformer provided in an embodiment of the present invention from leakage inductance zero load principle
Figure；
Fig. 5 is a kind of illustrating from leakage inductance calculation method process for for transformer disclosed in second of embodiment of the invention
Figure；
Fig. 6 is a kind of for transformer provided in an embodiment of the present invention from leakage inductance computing device structure schematic diagram；
Fig. 7 is that a kind of for transformer provided in an embodiment of the present invention from leakage inductance calculates device structure schematic diagram；
Fig. 8 is a kind of verifying curve synoptic diagram of the verifying provided in an embodiment of the present invention from leakage inductance accuracy.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a kind of for transformers from leakage inductance calculation method, device, equipment and storage medium,
Improve the precision from leakage inductance of calculated transformer.
A kind of for transformer provided by the present application from leakage inductance calculation method, due to when transformer core is saturated to from
The influence of leakage inductance parameter is smaller, it is provided by the present application from leakage inductance calculation method be suitable for transformer high-voltage winding side and low pressure around
Group side is not loaded into the side zero load metering of iron core advance horizontal high voltage and low-pressure side zero load metering, when high-voltage winding side and low pressure winding side
When unloaded, the case where analogue transformer high-voltage winding side and low pressure winding side core sataration, measures calculating to from leakage inductance.
Referring to Figure 1, Fig. 1 is a kind of for transformer that the first of the invention embodiment provides from leakage inductance calculation method
Flow diagram, this method comprises:
S10: the first high side voltage and corresponding first high voltage side current applied in high-voltage winding side is obtained.
S11: it is built using the first high side voltage, the first high voltage side current, magnetizing inductance and high-pressure side to be solved from leakage inductance
Vertical first equation.
Specifically, in the present embodiment, in order to which this step S11 is described in detail, the embodiment of the invention provides Fig. 2,
Fig. 2 is a kind of high-pressure side of the high-voltage winding side of transformer provided in an embodiment of the present invention from leakage inductance zero load schematic diagram, to transformation
Device carry out high-voltage winding side no load test when, magnetizing inductance be equivalent to transformer iron core saturation when the case where, in high-voltage winding
It is to guarantee that the high voltage side current of high-voltage winding side is no more than the specified electricity of high-voltage winding side that side, which applies the first high side voltage,
Stream, the first equation can specifically be indicated using following formula:
Lair1=L1σ+L′mair
In above formula, U1For the first high side voltage, I1For the first high voltage side current, L1σIt is high-pressure side to be solved from leakage inductance,
L′mairFor magnetizing inductance, w is power frequency angular frequency, Lair1To apply the inductance parameters after the first high side voltage, Lair1It is equivalent to
The inductance of high-voltage winding side when iron core is saturated.
In Fig. 2, high-pressure side winding resistance R1σResistance value be far smaller than high-pressure side winding inductance L1σInductance value, it is low
Press side winding resistance R '2σResistance value be far smaller than low-pressure side winding inductance L '2σInductance value and magnetizing inductance L 'mairIt is much small
In excitation resistance R 'mResistance value.
S12: the low-pressure side voltage applied in low pressure winding side and corresponding low-pressure side electric current are obtained.
S13: second party is established from leakage inductance using low-pressure side voltage, low-pressure side electric current, magnetizing inductance and low-pressure side to be solved
Journey.
Specifically, in the present embodiment, in order to which this step S13 is described in detail, the embodiment of the invention provides Fig. 3,
Fig. 3 is a kind of low-pressure side of the low pressure winding side of transformer provided in an embodiment of the present invention from leakage inductance zero load schematic diagram, to transformation
Device carry out low pressure winding side no load test when, magnetizing inductance be equivalent to transformer iron core saturation when the case where, in low pressure winding
It is the rated current in order to guarantee the low-pressure side electric current of low pressure winding side no more than low pressure winding side that side, which applies low-pressure side voltage, the
Two equations can specifically be indicated using following formula:
L′air2=L '2σ+L′mair
In above formula, U2For low-pressure side voltage, I2For low-pressure side electric current, L '2σIt is low-pressure side to be solved from leakage inductance, Lair2To apply
The inductance parameters of low pressure winding side after adding low-pressure side voltage, Lair2It is equivalent to low pressure winding inductance when iron core saturation.Wherein,
L′air2It can be calculated using following formula:
L′air2=k2Lair2
Wherein, k is the no-load voltage ratio of transformer.
In Fig. 3, the size of each parameter relatively may refer to the description in Fig. 2, and details are not described herein for the embodiment of the present invention.
S14: in low pressure winding side when short circuit, the second high side voltage applied in high-voltage winding side and corresponding the are obtained
Two high voltage side currents.
S15: using the second high side voltage, the second high voltage side current, high-pressure side to be solved from leakage inductance and low pressure to be solved
Third equation is established from leakage inductance in side.
Specifically, in order to which step S15 is described in detail, the embodiment of the invention provides Fig. 4, Fig. 4 in the present embodiment
For a kind of transformer provided in an embodiment of the present invention the short circuit of low pressure winding side when from leakage inductance zero load schematic diagram；In low pressure winding
After the short circuit of side, apply the second high side voltage in high-voltage winding side, correspondence obtains the second high voltage side current, and third equation is specifically adopted
It is indicated with following formula:
Lk=L '2σ+L1σ
In above formula, UkFor the second high side voltage, IkFor the second high voltage side current, L '2σIt is low-pressure side to be solved from leakage inductance,
L1σIt is high-pressure side to be solved from leakage inductance.
S16: the first equation of simultaneous, second equation and third equation solution low-pressure side to be solved from the per unit value of leakage inductance and to
Solve per unit value of the high-pressure side from leakage inductance.
Specifically, as optional embodiment of the present invention, step S16 includes:
The first equation of simultaneous, second equation and third equation solution low-pressure side to be solved from leakage inductance and high-pressure side to be solved from
Leakage inductance obtains low-pressure side from leakage inductance and high-pressure side from leakage inductance；
Determine the impedance reference value of transformer；
It calculates separately with low-pressure side from the ratio of leakage inductance and impedance reference value and high-pressure side from leakage inductance and impedance reference value
Ratio, the corresponding low-pressure side that obtains is from the per unit value of leakage inductance and high-pressure side from the per unit value of leakage inductance.
The low-pressure side solved can be indicated from leakage inductance and high-pressure side from leakage inductance using following formula:
Parameter in above formula is identical as the meaning of parameters that above-described embodiment is recorded.
The impedance reference value of transformer can be indicated using following formula:
Wherein, ZBFor impedance reference value, SNFor transformer rated capacity, UNFor transformer voltage rating.
Then low-pressure side can be calculated from the per unit value of leakage inductance and high-pressure side from the per unit value of leakage inductance using following formula:
Wherein,It is high-pressure side from the per unit value of leakage inductance,It is low-pressure side from the per unit value of leakage inductance.
After obtaining per unit value of the low-pressure side from the per unit value and high-pressure side of leakage inductance from leakage inductance, as optional embodiment,
Further include: the low-pressure side obtained using solution establishes the T of transformer from the per unit value of leakage inductance and high-pressure side from the per unit value of leakage inductance
Type equivalent circuit module.
A kind of for transformer that the first of the invention embodiment provides from leakage inductance calculation method, in the high pressure of transformer
Winding side and low pressure winding side apply the low-pressure side of this calculation method solution transformer from leakage inductance and high pressure before not installing iron core
Side specifically obtains the first high side voltage of high-voltage winding side and low pressure winding side, low-pressure side voltage and right from leakage inductance respectively
The first high voltage side current for answering, low-pressure side electric current, and the second high voltage side current in low-pressure side short circuit, according to transformer
When the first equation of magnetizing inductance correspondence establishment high-voltage winding side, the second equation of low pressure winding side and the short circuit of low pressure winding side
Third equation, three equations of last simultaneous can solve low-pressure side to be solved from the per unit value of leakage inductance and high-pressure side to be solved from
The per unit value of leakage inductance.Using this programme, before the winding side of transformer is not inserted into iron core, by high-voltage winding side and low pressure around
Group side applies voltage and is equivalent to saturation state in the iron core of transformer so that the iron core of transformer is equivalent to saturation state
Under, to being calculated from leakage inductance for transformer so that it is calculated from leakage inductance with transformer is actual differs error pair from leakage inductance
It should reduce, correspondingly, the T-type Type Equivalent Circuit Model and actual transformer performance gap of the transformer established are also smaller.
When applying the first high side voltage, the second high side voltage and low-pressure side voltage, in order to avoid the electricity of application
Pressure be worth it is excessively high and cause transformer be burned out and the voltage value that applies it is excessively high and cause transformer from the computational accuracy of leakage inductance compared with
Low, the present invention provides second of embodiments, refer to Fig. 5, and Fig. 5 is one kind disclosed in second of embodiment of the invention for becoming
Depressor from leakage inductance calculation method flow diagram, before iron core is not installed in the high-voltage winding side of transformer and low pressure winding side
Using the low-pressure side from leakage inductance calculation method solution transformer from leakage inductance and high-pressure side from leakage inductance, this method comprises:
S10: the first high side voltage and corresponding first high voltage side current applied in high-voltage winding side is obtained.
S20: judge whether the first high voltage side current exceeds high-pressure side rated current；If so, into S21；If it is not, then into
Enter S11.
S21: carrying out the first early warning so that target person adjusts the first high side voltage.
S11: it is built using the first high side voltage, the first high voltage side current, magnetizing inductance and high-pressure side to be solved from leakage inductance
Vertical first equation.
S12: the low-pressure side voltage applied in low pressure winding side and corresponding low-pressure side electric current are obtained.
S22: judging whether low-pressure side electric current exceeds low-pressure side rated current, if so, into S23, if it is not, then entering
S13。
S23: carrying out the second early warning so that target person adjusts low-pressure side voltage.
S13: second party is established from leakage inductance using low-pressure side voltage, low-pressure side electric current, magnetizing inductance and low-pressure side to be solved
Journey.
S14: in low pressure winding side when short circuit, the second high side voltage applied in high-voltage winding side and corresponding the are obtained
Two high voltage side currents.
S24: judging whether the second high voltage side current exceeds high-pressure side rated current, if so, into S25, if it is not, then into
Enter S15.
S25: carrying out third early warning so that target person adjusts the second high side voltage.
S15: using the second high side voltage, the second high voltage side current, high-pressure side to be solved from leakage inductance and low pressure to be solved
Third equation is established from leakage inductance in side.
S16: the first equation of simultaneous, second equation and third equation solution low-pressure side to be solved from the per unit value of leakage inductance and to
Solve per unit value of the high-pressure side from leakage inductance.
Specifically, the first early warning, the second early warning and third early warning can be different prompting modes, with
Which kind of voltage overload situation differentiation is.First early warning, the second early warning and third early warning include prompt information, with
And the overtension that currently applies or too low, in order to which technical staff makees corresponding adjustment, in adjustment high-voltage winding side and low pressure
After the voltage of winding side, the corresponding electric current in high-voltage winding side and low pressure winding side can also make corresponding change.
The for transformer that second of embodiment of the invention provides from leakage inductance calculation method, in the high-voltage winding of transformer
Side and low pressure winding side do not install before iron core using this calculation method solve the low-pressure side of transformer from leakage inductance and high-pressure side from
Leakage inductance specifically obtains the first high side voltage of high-voltage winding side and low pressure winding side, low-pressure side voltage and corresponding respectively
First high voltage side current, low-pressure side electric current, and the second high voltage side current in low-pressure side short circuit, according to the excitation of transformer
Third when the first equation of inductance correspondence establishment high-voltage winding side, the second equation of low pressure winding side and the short circuit of low pressure winding side
Equation, three equations of last simultaneous can solve low-pressure side to be solved from the per unit value of leakage inductance and high-pressure side to be solved from leakage inductance
Per unit value.Using this programme, before the winding side of transformer is not inserted into iron core, by high-voltage winding side and low pressure winding side
Apply voltage, so that the iron core of transformer is equivalent to saturation state, it is right in the case where the iron core of transformer is equivalent to saturation state
Transformer is calculated from leakage inductance, so that calculated, from leakage inductance and transformer, actual from leakage inductance difference, error is corresponding subtracts
It is small, correspondingly, the T-type Type Equivalent Circuit Model and actual transformer performance gap of the transformer established are also smaller.In application
Early warning is carried out when voltage value is excessively high, so that related technical personnel take corresponding measure in time, is avoided transformer and is burnt
It ruins and the voltage value that applies is excessively high and the problem that causes transformer lower from the computational accuracy of leakage inductance.
Fig. 6 is referred to, Fig. 6 is a kind of showing from leakage inductance computing device structure for for transformer provided in an embodiment of the present invention
It is intended to, comprising:
First obtains module 601, for obtaining the first high side voltage and corresponding first applied in high-voltage winding side
High voltage side current；
First establishes module 602, for utilizing the first high side voltage, the first high voltage side current, magnetizing inductance and wait ask
It solves high-pressure side and establishes the first equation from leakage inductance；
Second obtains module 603, for obtaining the low-pressure side voltage applied in low pressure winding side and corresponding low-pressure side electricity
Stream；
Second establishes module 604, for utilizing low-pressure side voltage, low-pressure side electric current, magnetizing inductance and low-pressure side to be solved
Second equation is established from leakage inductance；
Third obtains module 605, for obtaining the second high pressure applied in high-voltage winding side in the short circuit of low pressure winding side
Side voltage and corresponding second high voltage side current；
Third establishes module 606, for utilizing the second high side voltage, the second high voltage side current, high-pressure side to be solved certainly
Leakage inductance and low-pressure side to be solved establish third equation from leakage inductance；
Module 607 is solved, is used for the first equation of simultaneous, second equation and third equation solution low-pressure side to be solved from leakage inductance
Per unit value and high-pressure side to be solved from the per unit value of leakage inductance.
For transformer provided in this embodiment from leakage inductance computing device, transformer high-voltage winding side and low pressure around
Group side applies the low-pressure side of this calculation method solution transformer from leakage inductance and high-pressure side from leakage inductance before not installing iron core, specifically
The first high side voltage, low-pressure side voltage and corresponding first the high-pressure side electricity of high-voltage winding side and low pressure winding side are obtained respectively
Stream, low-pressure side electric current, and the second high voltage side current in low-pressure side short circuit, according to the magnetizing inductance correspondence establishment of transformer
Third equation when the first equation of high-voltage winding side, the second equation of low pressure winding side and the short circuit of low pressure winding side, finally joins
Vertical three equations can solve low-pressure side to be solved from the per unit value of leakage inductance and high-pressure side to be solved from the per unit value of leakage inductance.It adopts
With this programme, before the winding side of transformer is not inserted into iron core, by applying voltage in high-voltage winding side and low pressure winding side, from
And make the iron core of transformer be equivalent to saturation state, in the case where the iron core of transformer is equivalent to saturation state, to transformer from
Leakage inductance is calculated, so that it is calculated actual from the corresponding reduction of leakage inductance difference error from leakage inductance and transformer, correspondingly, building
The T-type Type Equivalent Circuit Model of vertical transformer and actual transformer performance gap are also smaller.Correspondingly, the transformer established
T-type Type Equivalent Circuit Model and actual transformer performance gap are also smaller.
Based on the above embodiment, as optional embodiment, further includes:
4th establishes module, for using solving obtained low-pressure side from the per unit value of leakage inductance and high-pressure side from the mark of leakage inductance
Value establishes the T-type Type Equivalent Circuit Model of transformer.
Based on the above embodiment, as optional embodiment, further includes:
First judgment module, for judging whether the first high voltage side current exceeds high-pressure side rated current, if so, into
First cue module,
First cue module, for carrying out the first early warning so that target person adjusts the first high side voltage；
Second judgment module, for judging whether low-pressure side electric current exceeds low-pressure side rated current, if so, into second
Cue module；
Second cue module, for carrying out the second early warning so that target person adjusts low-pressure side voltage.
Based on the above embodiment, as optional embodiment, further includes:
Third judgment module, for judging whether second high voltage side current exceeds the high-pressure side rated current, if
It is then to enter third cue module；
Third cue module, for carrying out third early warning so that target person adjusts second high side voltage.
Fig. 7 is referred to, Fig. 7 is a kind of showing from leakage inductance calculating device structure for for transformer provided in an embodiment of the present invention
It is intended to, comprising:
Memory 701, for storing computer program；
Processor 702, for executing the computer program stored in memory to realize what any of the above embodiment was mentioned
For transformer from leakage inductance calculation method the step of.
For transformer provided in this embodiment calculates equipment from leakage inductance, due to that can call memory by processor
The computer program of storage, realize for transformer provided such as above-mentioned any embodiment from leakage inductance calculation method the step of,
So this, which calculates equipment from leakage inductance, has with above-mentioned for transformer from leakage inductance calculation method same actual effect.
This programme in order to better understand, a kind of computer readable storage medium provided in an embodiment of the present invention, computer
It is stored with computer program on readable storage medium storing program for executing, realizes that any embodiment as above is mentioned when computer program is executed by processor
For transformer from leakage inductance calculation method the step of.
Computer readable storage medium provided in this embodiment, since computer-readable storage can be called by processor
The computer program of media storage realizes the step from leakage inductance calculation method of for transformer provided such as above-mentioned any embodiment
Suddenly, so this computer readable storage medium has similarly actually imitating from leakage inductance calculation method with above-mentioned for transformer
Fruit.
In order to which the effect to technical solution provided in an embodiment of the present invention is further detailed, the embodiment of the present invention is mentioned
A kind of application scenarios are supplied, wherein for the basic parameter of the transformer in this application scene referring to table 1, table 1 is that transformer is joined substantially
Number table.For the basic parameter of transformer provided in an embodiment of the present invention.
1 transformer basic parameter of table
| Capacity | 20kVA |
| Voltage class | 800V/38.2V |
| Rated current | 14.43A/302.3A |
| Short circuit loss | 409W |
| No-load loss | 118W |
Then according to the first high side voltage, low-pressure side voltage is applied in the embodiment of the present invention after, obtain corresponding transformation
Device inductance parameters Lair2And Lair1.Table 2 is referred to, table 2 is transformer inductance parameter testing result table.
2 transformer inductance parameter testing result of table
Secondly, being applied to technical solution provided in an embodiment of the present invention, dividing from leakage inductance for the transformer of the model is solved
It is notWithIn conjunction with the parameter in table 1, transformer T-type circuit simulation model is established in PSCAD, it is right
The transformer of solution is verified from leakage inductance, and the three-phase current of the transformer high-voltage winding side obtained using simulation model is instantaneous
Value and zero mould current vs are as shown in figure 8, Fig. 8 is a kind of verifying song of the verifying provided in an embodiment of the present invention from leakage inductance accuracy
Line schematic diagram, wherein dotted line represents actual recorder data, realizes and represents the emulation data that simulation model obtains, empty in Fig. 8
Line and solid line essentially coincide, therefore, through the embodiment of the present invention it is calculated from leakage inductance have height accuracy.
Being situated between from leakage inductance calculation method, device, equipment and storage to a kind of for transformer provided herein above
Matter is described in detail.Specific examples are used herein to illustrate the principle and implementation manner of the present application, above
The explanation of embodiment is merely used to help understand the present processes and its core concept.It should be pointed out that for the art
Those of ordinary skill for, under the premise of not departing from the application principle, can also to the application carry out it is several improvement and repair
Decorations, these improvement and modification are also fallen into the protection scope of the claim of this application.
Each embodiment is described in a progressive manner in specification, the highlights of each of the examples are with other realities
The difference of example is applied, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
Speech, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is referring to method part illustration
?.
Claims (10)
1. a kind of for transformer from leakage inductance calculation method, which is characterized in that in the high-voltage winding side of the transformer and low
It does not install and solves the low-pressure side of the transformer from leakage inductance and height from leakage inductance calculation method using described before iron core in pressure winding side
Press side from leakage inductance, comprising:
Obtain the first high side voltage and corresponding first high voltage side current applied in the high-voltage winding side；
It is built using first high side voltage, first high voltage side current, magnetizing inductance and high-pressure side to be solved from leakage inductance
Vertical first equation；
Obtain the low-pressure side voltage applied in the low pressure winding side and corresponding low-pressure side electric current；
Is established from leakage inductance using the low-pressure side voltage, the low-pressure side electric current, the magnetizing inductance and low-pressure side to be solved
Two equations；
In the low pressure winding side short circuit, the second high side voltage applied in the high-voltage winding side and corresponding the are obtained
Two high voltage side currents；
Using second high side voltage, second high voltage side current, the high-pressure side to be solved from leakage inductance and it is described to
It solves low-pressure side and establishes third equation from leakage inductance；
Mark of the low-pressure side to be solved described in first equation, the second equation described in simultaneous and the third equation solution from leakage inductance
The per unit value of value and the high-pressure side to be solved from leakage inductance.
2. for transformer according to claim 1 from leakage inductance calculation method, which is characterized in that described in the solution
Low-pressure side to be solved is from the per unit value of leakage inductance and the high-pressure side to be solved from after the per unit value of leakage inductance, further includes:
The low-pressure side obtained using solution establishes the T of the transformer from the per unit value of leakage inductance and high-pressure side from the per unit value of leakage inductance
Type Type Equivalent Circuit Model.
3. for transformer according to claim 1 or 2 from leakage inductance calculation method, which is characterized in that it is described to be solved
The solution procedure of per unit value of the low-pressure side from the per unit value and the high-pressure side to be solved of leakage inductance from leakage inductance specifically:
Low-pressure side to be solved described in first equation, the second equation described in simultaneous and the third equation solution is from leakage inductance and institute
High-pressure side to be solved is stated from leakage inductance, obtains low-pressure side from leakage inductance and high-pressure side from leakage inductance；
Determine the impedance reference value of the transformer；
The low-pressure side is calculated separately from the ratio of leakage inductance and the impedance reference value and the high-pressure side from leakage inductance and the resistance
The ratio of anti-a reference value, it is corresponding to obtain the low-pressure side from the per unit value of leakage inductance and the high-pressure side from the per unit value of leakage inductance.
4. for transformer according to claim 1 from leakage inductance calculation method, which is characterized in that in the acquisition in institute
After the first high side voltage and corresponding first high voltage side current of stating the application of high-voltage winding side, further includes:
Judge whether first high voltage side current exceeds high-pressure side rated current, if so, carry out the first early warning so that
Target person adjusts first high side voltage；
It is corresponding, in the acquisition after the low-pressure side voltage and corresponding low-pressure side electric current that the low pressure winding side applies,
Further include:
Judge whether the low-pressure side electric current exceeds low-pressure side rated current, if so, carrying out the second early warning so that described
Target person adjusts the low-pressure side voltage.
5. for transformer according to claim 4 from leakage inductance calculation method, which is characterized in that in the acquisition in institute
After the second high side voltage and corresponding second high voltage side current of stating the application of high-voltage winding side, further includes:
Judge whether second high voltage side current exceeds the high-pressure side rated current, if so, carrying out third early warning
So that the target person adjusts second high side voltage.
6. a kind of for transformer from leakage inductance computing device, which is characterized in that in the high-voltage winding and low pressure of the transformer
Winding do not install before iron core using it is described from leakage inductance computing device solve the transformer from leakage inductance, comprising:
First obtains module, for obtaining the first high side voltage and corresponding first high pressure that apply in the high-voltage winding side
Side electric current；
First establishes module, for utilizing first high side voltage, first high voltage side current, magnetizing inductance and wait ask
It solves high-pressure side and establishes the first equation from leakage inductance；
Second obtains module, for obtaining the low-pressure side voltage applied in the low pressure winding side and corresponding low-pressure side electric current；
Second establishes module, for utilizing the low-pressure side voltage, the low-pressure side electric current, the magnetizing inductance and to be solved low
Side is pressed to establish second equation from leakage inductance；
Third obtains module, in the low pressure winding side short circuit, obtain apply in the high-voltage winding side it is second high
Press side voltage and corresponding second high voltage side current；
Third establishes module, for utilizing second high side voltage, second high voltage side current, the high pressure to be solved
Third equation is established from leakage inductance and the low-pressure side to be solved from leakage inductance in side；
Module is solved, for be solved low described in the first equation, the second equation and the third equation solution described in simultaneous
Press side from the per unit value of leakage inductance and the high-pressure side to be solved from the per unit value of leakage inductance.
7. for transformer according to claim 6 from leakage inductance computing device, which is characterized in that further include:
4th establishes module, for using solving obtained low-pressure side from the per unit value of leakage inductance and high-pressure side from the per unit value of leakage inductance
Establish the T-type Type Equivalent Circuit Model of the transformer.
8. for transformer according to claim 6 from leakage inductance computing device, which is characterized in that further include:
First judgment module, for judging whether first high voltage side current exceeds high-pressure side rated current, if so, into
First cue module,
First cue module, for carrying out the first early warning so that target person adjusts first high side voltage；
Second judgment module, for judging whether the low-pressure side electric current exceeds low-pressure side rated current, if so, into second
Cue module；
Second cue module, for carrying out the second early warning so that target person adjusts the low-pressure side voltage.
9. a kind of for transformer calculates equipment from leakage inductance, which is characterized in that in the high-voltage winding and low pressure of the transformer
Winding do not install before iron core using it is described from leakage inductance calculate equipment solve the transformer from leakage inductance, comprising:
Memory, for storing computer program；
Processor, for executing the computer program stored in the memory to realize as described in any one of claim 1 to 5
For transformer from leakage inductance calculation method the step of.
10. a kind of computer readable storage medium, computer program, feature are stored on the computer readable storage medium
Be, the computer program be executed by processor with realize as transformer described in any one of claim 1 to 5 from
The step of leakage inductance calculation method.
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