CN207396558U - Adjust series resonant inverter Q circuit - Google Patents
Adjust series resonant inverter Q circuit Download PDFInfo
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- CN207396558U CN207396558U CN201721015149.2U CN201721015149U CN207396558U CN 207396558 U CN207396558 U CN 207396558U CN 201721015149 U CN201721015149 U CN 201721015149U CN 207396558 U CN207396558 U CN 207396558U
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Abstract
The utility model is related to a kind of adjusting series resonant inverter Q circuits, including experimental power supply, pressure regulator, booster, circuit equivalent resistance, reactor, matching capacitor, it is tested circuit equivalent capacity, it is tested voltage transformer and standard potential transformer, experimental power supply is connected with the input terminal of pressure regulator, the output terminal of pressure regulator is connected with the low pressure, input end of booster, the high-voltage output end of booster is connected with circuit equivalent resistance, circuit equivalent resistance is connected with reactor, reactor is connected with matching capacitor, matching capacitor is connected with a low side of booster；Subject circuit equivalent capacity is connected in parallel on the both ends of matching capacitor.The utility model adds the line-of-sight course Approach by inchmeal resonance point for waiting capacitance values interval using basic capacitance, its quality factor is measured respectively, next capacitance, the resonance point of Step wise approximation series circuit are selected after judging 3 points of relations with series circuit resonance point according to three groups of data.
Description
Technical field
The utility model is related to a kind of adjusting series resonant inverter Q circuits, and especially suitable is a kind of mutual for voltage
The adjusting series resonant inverter Q circuit of sensor on-site proving.
Background technology
Voltage transformer is the working measuring instrument of national requirements compulsory verification, and the on-site proving work of voltage transformer is
Voltage value transfers the important step of work, is the important means for the voltage transformer accurate measurement for ensureing onsite application.Voltage
The on-site proving experiment of mutual inductor needs to measure voltage transformer in the case where equipment has a power failure under different voltages measurement point
Error, it is therefore desirable to the experiment power supply equipment of adjustable voltage.Generally using series resonant inverter as voltage transformer scene
Experiment power supply during calibrating.Series resonant inverter is big in the case where providing identical voltage compared with traditional testing transformer
The big weight and volume for reducing equipment, at the same it is relatively low to the capacity requirement of field test power supply box.This feature to go here and there
Connection resonant devices have been widely used in power test.
Since the subject voltage transformer circuit capacitance value excursion of Different field is larger, to Different field
Need to match when voltage transformer is examined and determine certain magnitude capacitor and reactor so that circuit reaches approximate resonance state.
When resonance occurs for series resonant circuit, the ratio between the voltage of capacitor (or reactor) and the supply voltage of input are known as series resonance
The quality factor of circuit.Quality factor are higher, and same input voltage can obtain higher on capacitor (or reactor)
Output voltage.In order to obtain higher output voltage, generally use adjusts the capacitance of capacitor during on-site proving voltage transformer
The value reactance value of reactor (or adjust) adjusts the quality factor of series resonant circuit.General regulation quality factor is exploratory
It adjusts, until quality factor are met the requirements, adjusts process without ready patterns to follow, adjust process complexity, and be not easy to obtain higher
Quality factor.
Utility model content
The purpose of the utility model is to overcome above-mentioned deficiency in the prior art, and it is humorous to provide a kind of adjusting series connection
Shake power quality factor circuit.The utility model is using a group capacitor, reactor with being in capacitive subject voltage transformer
Loop sets adjust the quality factor of resonance circuit, so that series connection into series resonant circuit by adjusting the capacitance of capacitor
The quality factor of resonant devices meet the requirement of voltage transformer on-site proving experiment.
The technical scheme in the invention for solving the above technical problem is：A kind of adjusting series resonant inverter quality factor
Circuit, it is characterised in that：Including experimental power supply, pressure regulator, booster, circuit equivalent resistance, reactor, matching capacitor, quilt
Examination circuit equivalent capacity, subject voltage transformer and standard potential transformer, experimental power supply are connected with the input terminal of pressure regulator, adjust
The output terminal of depressor is connected with the low pressure, input end of booster, and the high-voltage output end of booster is connected with circuit equivalent resistance, returns
Road equivalent resistance is connected with reactor, and reactor is connected with matching capacitor, a low side phase of matching capacitor and booster
Even, the low side ground connection of booster；Subject circuit equivalent capacity is connected in parallel on the both ends of matching capacitor；It is tested voltage transformer
The both ends of matching capacitor are connected in parallel on, subject voltage transformer is connected in parallel on the both ends of subject circuit equivalent capacity；Normal voltage is mutual
Sensor is connected in parallel on the both ends of matching capacitor, and standard potential transformer is connected in parallel on the both ends of subject voltage transformer, normal voltage
Mutual inductor is connected in parallel on the both ends of subject circuit equivalent capacity.
The high-pressure side of matching capacitor described in the utility model, the high-pressure side for being tested circuit equivalent capacity, subject voltage are mutual
The high-pressure side of sensor and the high-pressure side of standard potential transformer are connected with reactor.
The low-pressure end of matching capacitor described in the utility model, the low-pressure end for being tested circuit equivalent capacity, subject voltage are mutual
The low-pressure end of sensor and the low-pressure end of standard potential transformer are connected with a low side of booster.
A kind of test method for adjusting series resonant inverter Q circuit, it is characterised in that：
R is the resistance value of circuit equivalent resistance, and L is the reactance value of reactor, CXIt is the capacitance of matching capacitor, C0It is
The capacitance of circuit equivalent capacity is tested,To be tested the virtual value of the voltage at circuit equivalent capacity both ends,For booster
Voltage between low side and the high-voltage output end of booster, ω are the angular frequency of experimental power supply, and j is imaginary unit；
WithThe ratio between be quality factorThen
Work as CXWhen=0,Quality factor are constant at this time；Work as CxDuring=+ ∞, Q=0；As 1- ω2L
(C0+CxDuring)=0,Quality factor are maximum at this time, and resonance occurs for circuit, reaches resonance curve Q-C at this timeX's
Resonance point；
QminIt is quality factor minimum value, as long as quality factor are more than QminVoltage transformer on-site proving experiment can be met
Requirement；With C0For basic capacitance, and three capacitance C are chosen with equal capacitance magnitude interval1=C0、C2=C0+C、C3=
C0+ 2C measures C respectively1、C2And C3Corresponding quality factor q1、Q2And Q3, then (C1, Q1)、(C2, Q2) and (C3, Q3) 3 points humorous
Shake curve Q-CXOn distribution situation can be divided into two classes distribution：First kind distribution is (C1, Q1)、(C2, Q2) and (C3, Q3) 3 points minutes
For cloth in the both sides of resonance point, the distribution of the second class is (C1, Q1)、(C2, Q2) and (C3, Q3) 3 points be distributed in the same of resonance point
Side.
Add the line-of-sight course Approach by inchmeal resonance point for waiting capacitance values interval using basic capacitance, you can be quickly found out satisfaction
The capacitance of on-site proving voltage transformer quality factor requirement makes the quality factor of circuit be more than quality factor minimum value, from
And make the calibrating circuit of voltage transformer that resonance (or approximate resonance) occur.
In first kind distribution, (C1, Q1)、(C2, Q2) and (C3, Q3) 3 points of both sides for being distributed in resonance point include two kinds of feelings
Condition：
The first situation：(C1, Q1)、(C2, Q2) and (C3, Q3) in 3 points a little in resonance curve Q-CXRaised bench
Section, other 2 points of decline stages in curve in 3 points；
The second situation：(C1, Q1)、(C2, Q2) and (C3, Q3) 2 points in 3 points are in resonance curve Q-CXRaised bench
Section, it is other a little in resonance curve Q-C in 3 pointsXDecline stage；
The processing method of first kind distribution is as follows：
At this point, take (C1, Q1)、(C2, Q2) and (C3, Q3) 2 points of larger corresponding matching capacitors of quality factor in 3 points
Capacitance capacitance of the average value as new one group of matching capacitor, survey its corresponding quality factor, and retain above-mentioned
Quality factor are maximum in four points 3 points, if still there are two kinds of situations of the first kind, repeat this step, until quality because
Number is met the requirements.
In the distribution of second class, (C1, Q1)、(C2, Q2) and (C3, Q3) 3 points be distributed in resonance point one side and include two kinds of feelings
Condition：
The first situation：(C1, Q1)、(C2, Q2) and (C3, Q3) 3 points in resonance curve Q-CXAscent stage；
The second situation：(C1, Q1)、(C2, Q2) and (C3, Q3) 3 points in resonance curve Q-CXDecline stage；
In the distribution of second class during the first situation, continue to increase the capacitance of matching capacitor at equal intervals, measure increase
The corresponding quality factor of capacitance of matching capacitor afterwards, while retain at 3 points of quality factor maximum, if there is the first kind
Distribution, the then processing method being distributed according to the first kind find the capacitance for the matching capacitor that quality factor are met the requirements；If go out
Existing second class distribution, then continue to increase capacitance value at equal intervals until there is first kind distribution, then by first kind distribution
Processing method is until find the quality factor met the requirements；
In the distribution of second class during the second situation, continue to reduce the capacitance of matching capacitor at equal intervals, measure reduction
The corresponding quality factor of capacitance of matching capacitor afterwards, while retain at 3 points of quality factor maximum, if there is the first kind
Distribution, the then processing method being distributed according to the first kind find the capacitance for the matching capacitor that quality factor are met the requirements；If go out
Existing second class distribution, then continue to reduce capacitance value at equal intervals until there is first kind distribution, then by first kind distribution
Processing method is until find the quality factor met the requirements.
Compared with prior art, the utility model substantially increases series resonant inverter regulation quality factor to the utility model
Efficiency is particularly suitable for the unknown substation field of subject voltage transformer primary circuit direct-to-ground capacitance, such as in GIS substations
The on-site proving of the electromagnetic potential transformer used and the electronic type voltage transformer used in AIS, GIS, PASS substation.
Series resonant inverter quality factor meet the requirements be to voltage transformer carry out on-site proving premise, often quality factor tune
Section process occupies the most of the time of voltage transformer on-site proving experiment.Test method designed by the utility model can be with
Quick regulation quality factor is allowed to be more than quality factor minimum value, and circuit is made to reach resonant condition (or approximate resonance state), from
And substantially increase the work efficiency of voltage transformer on-site proving experiment.
Description of the drawings
Fig. 1 is that the utility model embodiment adjusts series resonant inverter Q circuit structure diagram.
Fig. 2 is the utility model embodiment resonance curve Q-CXFigure.
Fig. 3 is the test method flow chart that the utility model embodiment adjusts series resonant inverter Q circuit.
Specific embodiment
Below in conjunction with the accompanying drawings and pass through embodiment the utility model is described in further detail, following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
Embodiment.
Referring to Fig. 1 to Fig. 3.
A kind of adjusting series resonant inverter Q circuit is present embodiments provided, installation method is as follows：It will experiment
Power supply 1 access pressure regulator 2 input terminal, pressure regulator 2 output termination booster 3 low pressure, input end, booster 3 it is once low
End ground connection, the High voltage output termination reactor 5 of booster 3, the series connection matching capacitor 6 of reactor 5, matching capacitor 6 and standard
Voltage transformer 9 and subject voltage transformer 7 are in parallel, i.e. the low-pressure end of matching capacitor 6, the low pressure of standard potential transformer 9
The low-pressure end of end and subject voltage transformer 7 is grounded, high-pressure side, the high-pressure side of standard potential transformer 9 of matching capacitor 6
It is both connected to together with the high-pressure side of subject voltage transformer 7.
The adjusting series resonant inverter Q circuit obtained by above-mentioned installation include experimental power supply 1, pressure regulator 2,
Booster 3, circuit equivalent resistance 4, reactor 5, matching capacitor 6, subject circuit equivalent capacity 8,7 and of subject voltage transformer
Standard potential transformer 9.
Wherein circuit equivalent resistance 4 for adjust series resonant inverter Q circuit in reactor 5, matching capacitor 6,
It is tested voltage transformer 7 and the corresponding total equivalent resistance of standard potential transformer 9.Circuit equivalent capacity 8 is tested as subject voltage
The equivalent capacity in the circuit where mutual inductor 7.
Experimental power supply 1 is connected with the input terminal of pressure regulator 2, the output terminal of pressure regulator 2 and the low pressure, input end phase of booster 3
Even, the high-voltage output end of booster 3 is connected with circuit equivalent resistance 4, and circuit equivalent resistance 4 is connected with reactor 5, reactor 5
It connects with matching capacitor 6, matching capacitor 6 is connected with a low side of booster 3, the low side ground connection of booster 3.
Subject circuit equivalent capacity 8 is connected in parallel on the both ends of matching capacitor 6.
Subject voltage transformer 7 is connected in parallel on the both ends of matching capacitor 6, and subject voltage transformer 7 is connected in parallel on subject circuit
The both ends of equivalent capacity 8.
Standard potential transformer 9 is connected in parallel on the both ends of matching capacitor 6, and standard potential transformer 9 is connected in parallel on subject voltage
The both ends of mutual inductor 7, standard potential transformer 9 are connected in parallel on the both ends of subject circuit equivalent capacity 8.
Preferably, the high-pressure side of matching capacitor 6 is connected with reactor 5, be tested the high-pressure side of circuit equivalent capacity 8 with
Reactor 5 is connected, and the high-pressure side of subject voltage transformer 7 is connected with reactor 5, high-pressure side and the electricity of standard potential transformer 9
Anti- device 5 is connected.The high-pressure side of matching capacitor 6, the high-pressure side for being tested circuit equivalent capacity 8, the high pressure for being tested voltage transformer 7
The high-pressure side of end and standard potential transformer 9 is first connected with each other, and is then connected again with reactor 5.
Preferably, the low-pressure end of matching capacitor 6 is connected with a low side of booster 3, is tested circuit equivalent capacity 8
Low-pressure end be connected with a low side of booster 3, be tested the low-pressure end of voltage transformer 7 and a low side phase of booster 3
Even, the low-pressure end of standard potential transformer 9 is connected with a low side of booster 3.The low-pressure end of matching capacitor 6 is tested back
Low-pressure end, the low-pressure end of subject voltage transformer 7 of road equivalent capacity 8 are first connected with the low-pressure end of standard potential transformer 9, so
It is connected afterwards with a low side of booster 3.
The present embodiment additionally provides the test method for adjusting series resonant inverter Q circuit.
R is the resistance value of circuit equivalent resistance 4, and L is the reactance value of reactor 5, CXIt is the capacitance of matching capacitor 6, C0
It is the capacitance for being tested circuit equivalent capacity 8,To be tested the virtual value of the voltage at 8 both ends of circuit equivalent capacity,For boosting
Voltage between low side of device 3 and the high-voltage output end of booster 3, ω are the angular frequency of experimental power supply 1, and j is imaginary number list
Position.
WithThe ratio between be quality factor
With reference to above-mentioned two formula, then
Work as CXWhen=0,Quality factor are constant at this time；Work as CxDuring=+ ∞, Q=0；
As 1- ω2L(C0+CxDuring)=0,Quality factor are maximum at this time, and resonance occurs for circuit, and it is bent to reach resonance at this time
Line Q-CXResonance point.
QminIt is quality factor minimum value, as long as quality factor q is more than QminVoltage transformer on-site proving examination can be met
The requirement tested.
With C0For basic capacitance, and three capacitance C are chosen with equal capacitance magnitude C intervals1=C0、C2=C0+ C and C3
=C0+2C.Measure C1Corresponding quality factor q1、C2Corresponding quality factor q2, C3Corresponding quality factor q3.Obtain (C1,
Q1)、(C2, Q2) and (C3, Q3) three point coordinates.
Then (C1, Q1)、(C2, Q2) and (C3, Q3) 3 points in resonance curve Q-CXOn distribution situation can be divided into two classes distribution：
First kind distribution is (C1, Q1)、(C2, Q2) and (C3, Q3) 3 points of both sides for being distributed in resonance point, the distribution of the second class is (C1, Q1)、
(C2, Q2) and (C3, Q3) 3 points of the same sides for being distributed in resonance point.
In first kind distribution, (C1, Q1)、(C2, Q2) and (C3, Q3) 3 points of both sides for being distributed in resonance point include two kinds of feelings
Condition：
The first situation of first kind distribution：(C1, Q1)、(C2, Q2) and (C3, Q3) in 3 points a little in resonance curve Q-
CXAscent stage, other 2 points of decline stages in curve in 3 points；
The second situation of first kind distribution：(C1, Q1)、(C2, Q2) and (C3, Q3) 2 points in 3 points are in resonance curve Q-
CXAscent stage, in 3 points in addition a little in resonance curve Q-CXDecline stage.
The processing method of first kind distribution is as follows：
At this point, take (C1, Q1)、(C2, Q2) and (C3, Q3) 2 points of larger corresponding matching capacitors of quality factor in 3 points
Capacitance C of the average value of 6 capacitance as new one group of matching capacitor 64If for example, Q1＜ Q2＜ Q3, then C4=(C2+
C3)/2。
Survey its C4Corresponding quality factor q4, obtain (C4, Q4), and retain (C1, Q1)、(C2, Q2)、(C3, Q3) and (C4, Q4)
Quality factor are maximum in four points 3 points.If for example, Q1＜ Q2＜ Q3＜ Q4, then (C is retained2, Q2)、(C3, Q3) and (C4, Q4)
Three points.
If still there are two kinds of situations of the first kind, such as (C2, Q2)、(C3, Q3) and (C4, Q4) three points be still distributed in it is humorous
The both sides to shake a little, take (C2, Q2)、(C3, Q3) and (C4, Q4) 2 points of larger corresponding matching capacitors of quality factor in three points
Capacitance C of the average value of 6 capacitance as new one group of matching capacitor 65.If for example, Q2＜ Q3＜ Q4, then C5=(C3+
C4)/2.It repeats the above steps until quality factor are met the requirements.
In the distribution of second class, (C1, Q1)、(C2, Q2) and (C3, Q3) 3 points be distributed in resonance point one side and include two kinds of feelings
Condition.
The first situation of second class distribution：(C1, Q1)、(C2, Q2) and (C3, Q3) 3 points in resonance curve Q-CXIt is upper
The stage of liter.
In the distribution of second class during the first situation, continue to be worth to C with the capacitance for increasing matching capacitor 6 at equal intervals4, C4
=C0+ 3C measures C4Corresponding quality factor q4, obtain point (C4, Q4).Retain (C1, Q1)、(C2, Q2)、(C3, Q3) and (C4, Q4)
3 points of middle quality factor maximum.If for example, Q1＜ Q2＜ Q3＜ Q4, then (C is retained2, Q2)、(C3, Q3) and (C4, Q4)。
If (C2, Q2)、(C3, Q3) and (C4, Q4) be distributed for the first kind, then the processing method being distributed according to the first kind finds product
The capacitance for the matching capacitor 6 that prime factor is met the requirements.If there is the distribution of the second class, continue to increase capacitance at equal intervals
Value is until there is first kind distribution, then by the processing method of first kind distribution up to finding the quality factor met the requirements.
The second situation of second class distribution：(C1, Q1)、(C2, Q2) and (C3, Q3) 3 points in resonance curve Q-CXUnder
Depression of order section.
In the distribution of second class during the second situation, continue to be worth to C with the capacitance for reducing matching capacitor 6 at equal intervals4, C4
=C0- C measures C4Corresponding quality factor q4, obtain point (C4, Q4).Retain (C1, Q1)、(C2, Q2)、(C3, Q3) and (C4, Q4)
3 points of middle quality factor maximum.If for example, Q1＜ Q2＜ Q3＜ Q4, then (C is retained2, Q2)、(C3, Q3) and (C4, Q4)。
If (C2, Q2)、(C3, Q3) and (C4, Q4) be distributed for the first kind, then the processing method being distributed according to the first kind finds product
The capacitance for the matching capacitor 6 that prime factor is met the requirements.If there is the distribution of the second class, continue to reduce capacitance at equal intervals
Value is until there is first kind distribution, then by the processing method of first kind distribution up to finding the quality factor met the requirements.
The present embodiment adjusts the test method of series resonant inverter Q circuit and the capacitances such as adds using basic capacitance
It is worth the line-of-sight course Approach by inchmeal resonance point at interval, quality factor is made to be more than quality factor minimum value, so that series circuit occurs
Resonance (or approximate resonance).Add the line-of-sight course Approach by inchmeal resonance point for waiting capacitance values interval using basic capacitance, measure respectively
Its quality factor selects next capacitance, progressively after judging 3 points of relations with series circuit resonance point according to three groups of data
The resonance point of series circuit is approached until quality factor are more than quality factor minimum value.At this point, voltage transformer examines and determine circuit
Generation resonance (or approximate resonance), you can carry out the on-site proving experiment of voltage transformer.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of parts and components is named
Title etc. can be different, and the above content described in this specification is only to the utility model structure example explanation.
The equivalence changes or simple change that all construction, feature and principles according to described in the utility model patent concept are done, are wrapped
It includes in the protection domain of the utility model patent.Those skilled in the art of the present invention can be to described
Specific embodiment does various modifications or additions or substitutes in a similar way, without departing from the knot of the utility model
Structure surmounts scope defined in the claims, all should belong to the protection range of the utility model.
Claims (3)
1. a kind of adjusting series resonant inverter Q circuit, it is characterised in that：Including experimental power supply, pressure regulator, booster,
Circuit equivalent resistance, reactor, matching capacitor, subject circuit equivalent capacity, subject voltage transformer and normal voltage mutual inductance
Device, experimental power supply are connected with the input terminal of pressure regulator, and the output terminal of pressure regulator is connected with the low pressure, input end of booster, booster
High-voltage output end be connected with circuit equivalent resistance, circuit equivalent resistance is connected with reactor, reactor and matching capacitor string
Connection, matching capacitor are connected with a low side of booster, the low side ground connection of booster；It is in parallel to be tested circuit equivalent capacity
At the both ends of matching capacitor；Subject voltage transformer is connected in parallel on the both ends of matching capacitor, and subject voltage transformer is connected in parallel on
It is tested the both ends of circuit equivalent capacity；Standard potential transformer is connected in parallel on the both ends of matching capacitor, and standard potential transformer is simultaneously
The both ends of subject voltage transformer are associated in, standard potential transformer is connected in parallel on the both ends of subject circuit equivalent capacity.
2. adjusting series resonant inverter Q circuit according to claim 1, it is characterised in that：The matching capacitance
The high-pressure side of device, the high-pressure side for being tested circuit equivalent capacity, the high-pressure side for being tested voltage transformer and standard potential transformer
High-pressure side is connected with reactor.
3. adjusting series resonant inverter Q circuit according to claim 1 or 2, it is characterised in that：The matching
The low-pressure end of capacitor, the low-pressure end for being tested circuit equivalent capacity, the subject low-pressure end of voltage transformer and normal voltage mutual inductance
The low-pressure end of device is connected with a low side of booster.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721015149.2U CN207396558U (en) | 2017-08-15 | 2017-08-15 | Adjust series resonant inverter Q circuit |
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|---|---|---|---|
| CN201721015149.2U CN207396558U (en) | 2017-08-15 | 2017-08-15 | Adjust series resonant inverter Q circuit |
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ID=62419152
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389995A (en) * | 2017-08-15 | 2017-11-24 | 华电电力科学研究院 | Adjust series resonant inverter Q circuit and its method of testing |
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2017
- 2017-08-15 CN CN201721015149.2U patent/CN207396558U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389995A (en) * | 2017-08-15 | 2017-11-24 | 华电电力科学研究院 | Adjust series resonant inverter Q circuit and its method of testing |
| CN107389995B (en) * | 2017-08-15 | 2023-08-15 | 华电电力科学研究院有限公司 | Circuit for adjusting quality factor of series resonance power supply and testing method thereof |
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