CN109406880A - A kind of detection system and method for insulation resistance - Google Patents
A kind of detection system and method for insulation resistance Download PDFInfo
- Publication number
- CN109406880A CN109406880A CN201811544541.5A CN201811544541A CN109406880A CN 109406880 A CN109406880 A CN 109406880A CN 201811544541 A CN201811544541 A CN 201811544541A CN 109406880 A CN109406880 A CN 109406880A
- Authority
- CN
- China
- Prior art keywords
- resistance
- value
- measurement
- variable
- resistance value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 52
- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title description 16
- 238000005259 measurement Methods 0.000 claims abstract description 208
- 230000003993 interaction Effects 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 11
- 230000009466 transformation Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 5
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses a kind of detection systems of insulation resistance, comprising: acquisition equipment and control equipment；Acquiring equipment includes Acquisition Circuit, and for connecting with measurement object, the corresponding measurement voltage of measurement object of bridge measurement is used to control equipment output；The control equipment being connect with acquisition equipment, for controlling the resistance value of the variable resistance in Acquisition Circuit and the reference voltage value of variable power supply, and according to the insulating resistance value of measurement voltage calculating measurement object；The present invention controls the resistance value of the variable resistance in Acquisition Circuit and the reference voltage value of variable power supply by control equipment, changeable fluid, multivoltage input and more bridge measurements may be implemented, make to adjust measurement range to the insulation resistance value of measurement object after repeatedly measuring and exactly match, measurement accuracy and applicability are improved, the user experience is improved.In addition, the invention also discloses a kind of detection methods of insulation resistance, equally there is above-mentioned beneficial effect.
Description
Technical field
The present invention relates to electrical safety detection technique field, in particular to the detection system and method for a kind of insulation resistance.
Background technique
With the continuous renewal and expansion of state-of-the-art technology, the reliability to electric system and high voltage installation is it is also proposed that more
High requirement, there is accident or damage in electrical equipment, usually closely related with the defect of insulation.The large capacity of electrical equipment
Change, Towards Higher Voltage, structure diversification and sealingization should propose update, higher requirement to electrical equipment.Large capacity equipment
Using being continuously increased, its insulation performance can not be detected with common megameter.
In the prior art, power test regulation to numerous power equipments such as: cable, motor, generator, transformer, mutually
Sensor, high-voltage switch gear, arrester require to do a series of dielectric test, need to use insulation tester, conventional insulator inspection
The detection method for surveying instrument needs to set fixed voltage and measurement range.However, the measurement of the insulation resistance of above-mentioned power equipment
Range is often from several K to several G etc., and single voltage and measurement range are difficult to accurately measure and insulate in existing insulation tester
The different power equipments that resistance value (insulating resistance value) has a long way to go, so that measuring accuracy is not high.
Therefore, how measurement range is automatically adjusted, measurement object (power equipment) can be matched
Insulation resistance value improves measurement accuracy and applicability, promotes user experience, is urgent problem now.
Summary of the invention
The object of the present invention is to provide a kind of detection system of insulation resistance and methods, to be adjusted automatically to measurement range
It is whole, the insulation resistance value of measurement object can be matched, measurement accuracy and applicability are improved.
In order to solve the above technical problems, the present invention provides a kind of detection system of insulation resistance, comprising: acquisition equipment and control
Control equipment；
The acquisition equipment includes Acquisition Circuit, for connecting with measurement object, uses bridge method to control equipment output
The corresponding measurement voltage of the measurement object of measurement；
The control equipment being connect with the acquisition equipment, for controlling the variable resistance in the Acquisition Circuit
The reference voltage value of resistance value and variable power supply, and according to the insulating resistance value for measuring voltage and calculating the measurement object.
Optionally, the Acquisition Circuit, comprising: the first variable resistance, the second adjustable resistance, third variable resistance, the 4th
Variable resistance and variable power supply circuit；
Wherein, the first end of first variable resistance with the first end of the measurement object for connecting, and described first
The second end of variable resistance connect the defeated of its common end and the variable power supply circuit with the first end of the second adjustable resistance
Outlet connection, for the first end of the third variable resistance for connecting with the second end of the measurement object, the third is variable
The second end of resistance connect its common end with the first end of the 4th variable resistance for the input terminal with the control equipment
Connection exports the measurement voltage to the control equipment, and the second end of the second adjustable resistance and the described 4th can power transformation
The second end of resistance connects its common end grounding；
Corresponding, the control equipment is specifically used for controlling the first variable resistance, the second adjustable resistance, described
The reference voltage value of the resistance value and the variable power supply circuit of third variable resistance and the 4th variable resistance.
Optionally, first variable resistance, the second adjustable resistance, the third variable resistance and the described 4th can
Power transformation resistance is specially variable number resistor, and the variable power supply circuit is specially variable number power circuit.
Optionally, the acquisition equipment, further includes:
Amplifying circuit, after being amplified to the measurement voltage, by amplified measurement voltage output to the control
Control equipment；Wherein, the input that the measurement voltage output end of the Acquisition Circuit passes through the amplifying circuit and the control equipment
End connection.
Optionally, the system further include:
The human-computer interaction device being connect with the control equipment, for showing the insulating resistance value using display unit,
Corresponding control parameter is generated according to user's operation using operation equipment, and is sent to the control unit.
Optionally, the system further include:
The communication equipment being connect with the control equipment, for sending corresponding terminal for the insulating resistance value.
In addition, being applied to as described in any one of the above embodiments exhausted the present invention also provides a kind of detection method of insulation resistance
The detection system of edge resistance, comprising:
After Acquisition Circuit is connect with measurement object, the current measurement voltage that the Acquisition Circuit is sent is obtained；
Judge the current measurement voltage whether in current reference voltage value and/or the corresponding measurement range of current resistive value
It is interior；
If it is not, then calculating and adjusting the electricity of the variable resistance in the Acquisition Circuit according to the current measurement voltage
The reference voltage value of resistance value and/or variable power supply, and execute the current measurement voltage for obtaining the Acquisition Circuit transmission
Step；
If so, calculating institute according to the current measurement voltage, the current reference voltage value and the current resistive value
State the insulating resistance value of measurement object.
Optionally, described according to the current measurement voltage, it calculates and adjusts the variable resistance in the Acquisition Circuit
Resistance value and/or variable power supply reference voltage value, comprising:
According to the current measurement voltage and the measurement range, next measurement range is selected, and by the Acquisition Circuit
In the resistance value of variable resistance and the reference voltage value of variable power supply be adjusted to the corresponding resistance of next measurement range
Value and voltage value.
Optionally, described according to the current measurement voltage, it calculates and adjusts the variable resistance in the Acquisition Circuit
Resistance value and/or variable power supply reference voltage value, comprising:
If the current measurement voltage is greater than the maximum value of the measurement range, next resistance value is calculated, and will be described
The resistance value adjusting of variable resistance in Acquisition Circuit is next resistance value；Wherein, next resistance value is less than institute
State current resistive value；
If the current measurement voltage is less than the minimum value of the measurement range, next resistance value is calculated, and will be described
The resistance value adjusting of variable resistance in Acquisition Circuit is next resistance value；Wherein, next resistance value is greater than institute
State current resistive value.
Optionally, described according to the current measurement voltage, the current reference voltage value and the current resistive value, meter
After the insulating resistance value for calculating the measurement object, further includes:
Judge whether the insulating resistance value is less than default early warning value；
If so, disconnect the corresponding dangerous circuit of the measurement object, and using human-computer interaction device and communication equipment into
Row alarm.
The detection system of a kind of insulation resistance provided by the present invention, comprising: acquisition equipment and control equipment；Acquire equipment
It is corresponding using the measurement object of bridge measurement to control equipment output for being connect with measurement object including Acquisition Circuit
Measure voltage；With the control equipment that connect of acquisition equipment, for control the resistance value of the variable resistance in Acquisition Circuit with can
The reference voltage value of variable power source, and according to the insulating resistance value of measurement voltage calculating measurement object；
As it can be seen that the present invention passes through the resistance value and variable power supply for controlling the variable resistance in equipment control Acquisition Circuit
Changeable fluid, multivoltage input and more bridge measurements may be implemented in reference voltage value, and making can be by measurement range after repeatedly measuring
It adjusts and is exactly matched with the insulation resistance value of measurement object, improve measurement accuracy and applicability, the user experience is improved.This
Outside, the present invention also provides a kind of detection methods of insulation resistance, equally have above-mentioned beneficial effect.
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
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.
Fig. 1 is a kind of structural block diagram of the detection system of insulation resistance provided by the embodiment of the present invention；
Fig. 2 is a kind of circuit signal of the Acquisition Circuit of the detection system of insulation resistance provided by the embodiment of the present invention
Figure；
Fig. 3 is a kind of testing process schematic diagram of the detection system of insulation resistance provided by the embodiment of the present invention；
Fig. 4 is a kind of flow chart of the detection method of insulation resistance provided by the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A 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
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is a kind of structural block diagram of the detection system of insulation resistance provided by the embodiment of the present invention.
The system may include: acquisition equipment 10 and control equipment 20；
Acquiring equipment 10 includes Acquisition Circuit, for connecting with measurement object, uses bridge method to the control output of equipment 20
The corresponding measurement voltage of the measurement object of measurement；
With the control equipment 20 that connect of acquisition equipment 10, for control the resistance value of the variable resistance in Acquisition Circuit with
The reference voltage value of variable power supply, and according to the insulating resistance value of measurement voltage calculating measurement object.
Wherein, the Acquisition Circuit in equipment 10 is acquired in the present embodiment, can be to pass through variable resistance and variable power supply
Built-up circuit can be corresponding using bridge measurement measurement object when the circuit is connect with measurement object (such as power equipment)
Voltage is measured, and outputs it to control equipment 20.Specifically, for acquiring in equipment 10 by variable resistance and variable power supply
The particular circuit configurations of the Acquisition Circuit of composition, can be by designer according to practical scene and user demand self-setting, such as
Shown in Fig. 2, acquisition equipment 10 may include the first variable resistance (R1), the second adjustable resistance (R2), third variable resistance (R3)
With this four variable resistances of the 4th variable resistance (R4), and the variable power supply electricity in output end output reference voltage (Uref)
Road；Wherein, the first end of the first variable resistance with the first end of measurement object (Rx) for connecting, and the second of the first variable resistance
End connect its common end with the first end of the second adjustable resistance and connect with the output end of variable power supply circuit, third variable resistance
For connecting with the second end of measurement object, the first end of the second end of third variable resistance and the 4th variable resistance connects first end
Its common end is connect for connecting with the input terminal of control equipment 20, measures voltage (Ux) to the control output of equipment 20, second is variable
The second end of resistance connect its common end grounding with the second end of the 4th variable resistance.It can be according to acquisition as long as controlling equipment 20
The measurement voltage that equipment 10 is sent, calculates the insulating resistance value of measurement object, the present embodiment does not do any restrictions to this.
It is understood that the purpose of the present embodiment can be controlled to pass through the control equipment 20 connecting with acquisition equipment 10
The resistance value of variable resistance in Acquisition Circuit processed and the reference voltage value of variable power supply, such as R1, R2, R3 in control figure 2 and
The resistance value of R4 and the reference voltage value (Uref) of variable power supply circuit output measure systematic survey provided by the present embodiment
The measurement range of the insulation resistance of object can be changed (changeable fluid), and reference voltage value can be changed (multivoltage input) and variable resistance
Resistance value can be changed (more bridge measurements), arrived and survey to allow to control equipment 20 and adjust measurement range after multiple measurement
The insulation resistance value exact matching for measuring object, improves measurement accuracy.Specifically, in Acquisition Circuit in this present embodiment can power transformation
Hinder the specific structure type of device and variable power supply, can by designer's self-setting, as R1, R2, R3 and R4 in Fig. 2 this four
A variable resistance is disposed as variable number resistor, sets variable power supply to the variable number power supply of output reference voltage
Circuit.As long as control equipment 20 can control the resistance value of the variable resistance in Acquisition Circuit and the reference voltage of variable power supply
Value, the present embodiment do not do any restrictions to this.
Specifically, in the present embodiment as the control equipment 20 of processor can according to measurement voltage calculate measurement object
Insulating resistance value can be adopted specific calculation by designer's self-setting since control equipment 20 can control
The resistance value of variable resistance in collector and the reference voltage value of variable power supply, therefore, control equipment 20, which can determine, to be connect
The resistance value of the corresponding variable resistance of measurement voltage received and the reference voltage value of variable power supply, acquisition equipment 10 includes such as
When Acquisition Circuit shown in Fig. 2, the insulating resistance value (Rx) of measurement object can be calculated in control equipment by following formula.
The present embodiment does not do any restrictions to this.
It is corresponding, the measurement voltage for the Acquisition Circuit output that equipment 20 receives in acquisition equipment 10 is controlled for convenience, this
Acquisition equipment 10 in embodiment can also include the amplifying circuit for amplifying to measurement voltage, make control equipment 20 can
To receive amplified measurement voltage, i.e. the measurement voltage output end of Acquisition Circuit passes through amplifying circuit and controls the defeated of equipment 20
Enter end connection, the common end as third variable resistance (R3) in Fig. 2 and the 4th variable resistance (R4) connect can be used as acquisition electricity
The measurement voltage output end on road is connect by amplifying circuit with the input terminal of control equipment 20.Corresponding, control equipment 20 can be with
Measurement voltage according to the amplification factor of amplifying circuit, before determining amplification.
Further, the service condition that system provided by the present embodiment can be understood in order to facilitate user, such as Fig. 1 institute
It states, system provided by embodiment can also include and control the human-computer interaction device 30 of the connection of equipment 20, for utilizing display
Component shows insulating resistance value.I.e. the display equipment just like display screen, display control apparatus can be set in human-computer interaction device 30
The insulating resistance value of 20 measurement objects being calculated.Specifically, the display unit in human-computer interaction device 30 is shown
Particular content, can by designer's self-setting, can measurement object that only display control apparatus 20 is calculated insulation
Resistance value, can also be with the resistance value (R1-R4 in such as Fig. 2 of the variable resistance in Acquisition Circuit that display control apparatus 20 is arranged
Resistance value), the reference voltage value (voltage value of Uref in such as Fig. 2) of variable power supply and measurement voltage value be (such as the Ux in Fig. 2
Voltage value), the present embodiment does not do any restrictions to this.
It is corresponding, as described in Figure 1, system provided by embodiment can also include and control equipment 20 connection communication set
Standby 40, for sending corresponding terminal for insulating resistance value.As controlled equipment 10 can be by the measurement object being calculated
Insulating resistance value and other parameters (resistance value of such as variable resistance, the reference voltage value of variable power supply and measurement voltage value)
It is separately sent to the display of human-computer interaction device 30 and communication equipment 40, the terminal of default mailing address is uploaded to by communication equipment
(such as cloud platform), make user no matter display equipment near or distally, the measurement situation of available measurement object.
It should be noted that in order to guarantee measurement object using safe, equipment 20 is controlled provided by the present embodiment, also
Can when the insulating resistance value of measurement object is less than default early warning value, in the corresponding dangerous circuit of control measurement object as handed over
The controllable switch of contactor, relay etc. is flowed, cuts off dangerous circuit, and human-computer interaction device 30 and communication equipment 40 are reported
It is alert.I.e. control equipment 20 can also controllable switch in dangerous circuit corresponding with measurement object control terminal connection.Wherein, on
The electricity of security risk can be easy to produce for when the insulating resistance value of measurement object is less than default early warning value by stating dangerous circuit
Road.
Corresponding, the human-computer interaction device 30 in the present embodiment can also include the operation equipment such as press key equipment, thus
Corresponding control parameter (such as default setting and default early warning value) is generated according to user's operation, and is sent to control unit 20.It is right
It answers, human-computer interaction device 30 can also connect with communication equipment 40, so that user is utilized the default logical of operation equipment setting
Letter address is sent to communication equipment 40.
It, can be with specifically, the detailed process that system provided by the present embodiment calculates the insulating resistance value of measurement object
As shown in figure 3, default setting and the parameters such as default early warning value and mailing address are arranged first, then control equipment 20 and be arranged automatically
The reference of resistance value (the electric bridge resistance value, such as the resistance value of R1-R4 in Fig. 2) and variable power supply of variable resistance in Acquisition Circuit
Voltage value, after the completion of system initialization, control equipment 20 receives the measurement voltage of Acquisition Circuit output, judges whether measure voltage
In measurement range；If it is not, then calculating the reference voltage value of the resistance value and variable power supply that adjust variable resistance；If so,
The insulating resistance value of measurement object is calculated, and judges whether insulating resistance value is less than default early warning value (insulation early warning)；If being less than,
It is then alarmed and is controlled and disconnect the corresponding dangerous circuit of measurement object；If being not less than, terminate this process or display insulated electro
Resistance value.The present embodiment does not do any restrictions to this.
Corresponding, when measuring the insulation resistance value of the measurement object of hyperbaric environment, insulation resistance value is relatively high at this time, and system is initial
To change and completes, the control acquisition measurement voltage of equipment 20, measurement voltage at this time can be less than normal, and electric bridge resistance value is increased, is measured again, until
Voltage is measured in optimum range, then calculates insulation resistance value.When measuring the insulation resistance value of the measurement object of environment under low pressure, at this time absolutely
Edge resistance value is relatively low, and system initialization is completed, and the control acquisition measurement voltage of equipment 20, measurement voltage at this time can be bigger than normal, reduces
Electric bridge resistance value, measures again, until voltage value is in optimum range, then calculates insulation resistance value.
In the present embodiment, the embodiment of the present invention controls the resistance value of the variable resistance in Acquisition Circuit by control equipment
With the reference voltage value of variable power supply, changeable fluid, multivoltage input and more bridge measurements may be implemented, making can after repeatedly measuring
It being exactly matched with adjusting measurement range to the insulation resistance value of measurement object, improving measurement accuracy and applicability, improving
User experience.
Based on the above embodiment, referring to FIG. 4, Fig. 4 is a kind of detection of insulation resistance provided by the embodiment of the present invention
The flow chart of method.This method can be applied to the detection system of insulation resistance provided by above-described embodiment, may include:
Step 101: after Acquisition Circuit is connect with measurement object, obtaining the current measurement voltage that Acquisition Circuit is sent.
Wherein, the current measurement voltage in this step can for insulation resistance detection system in as processor control
Equipment current time received measurement voltage value.It is corresponding, it can also include variable in setting Acquisition Circuit before this step
The current resistive value (resistance value of R1-R4 in such as Fig. 2) of resistor and the current reference voltage value of variable power supply are (in such as Fig. 2
The voltage value of Uref) the step of, keep Acquisition Circuit electric in current reference in current resistive value and variable power supply in variable resistance
In the case where pressure value, current measurement voltage is sent to control equipment.
Step 102: whether the current measurement voltage of judgement is in current reference voltage value and/or the corresponding measurement of current resistive value
In range；If it is not, then entering step 103；If so, entering step 104.
It is understood that the current reference voltage value and current resistive value in this step can work as Acquisition Circuit output
The resistance value of the reference voltage value of corresponding variable power supply and variable resistance when preceding measurement voltage.Current reference in this step
Voltage value and/or the corresponding measurement range of current resistive value can voluntarily be set by designer with practical scene and user demand
It sets, can be a fixed measurement range；It may be measurement model corresponding with current reference voltage value or current resistive value
It encloses, as measurement range corresponds to change with the variation of current reference voltage value or current resistive value；Or join with current
Voltage value and the corresponding measurement range of current resistive value are examined, such as measurement range with current reference voltage value and current resistive value
Change and corresponds to change.The present embodiment does not do any restrictions to this.
Step 103: according to current measurement voltage, calculate and adjust the variable resistance in Acquisition Circuit resistance value and/
Or the reference voltage value of variable power supply, and enter step 101.
It is understood that the purpose of this step can be the measurement voltage value acquired at current time, it is not at best
When measurement range, by calculating and adjusting the resistance value of the variable resistance in Acquisition Circuit and/or the reference electricity of variable power supply
Pressure value, the measurement voltage value of adjustment subsequent time acquisition, until the measurement voltage value of acquisition is in optimum measurement range.
Specifically, in this step control equipment according to currently measure voltage, calculate and adjust in Acquisition Circuit can
The concrete mode of the reference voltage value of the resistance value and/or variable power supply of variohm, can be by designer according to practical field
Scape and user demand self-setting such as preset the electricity of multiple measurement ranges and the corresponding variable resistance of each measurement range
When the reference voltage value of resistance value and variable power supply, this step can select next survey according to current measurement voltage and measurement range
Range is measured, and the reference voltage value of the resistance value of the variable resistance in Acquisition Circuit and variable power supply is adjusted to next measurement
The corresponding resistance value of range and voltage value.When a measurement range is arranged, this step can first judge that it is big for currently measuring voltage
It is also less than the minimum value of measurement range in the maximum value of measurement range, if currently measurement voltage is greater than the maximum of measurement range
Value then calculates next resistance value, and is next resistance value by the resistance value adjusting of the variable resistance in Acquisition Circuit；Wherein,
Next resistance value is less than current resistive value；If currently measurement voltage is less than the minimum value of measurement range, next resistance value is calculated,
And by the resistance value adjusting of the variable resistance in Acquisition Circuit be next resistance value；Wherein, next resistance value is greater than current electricity
Resistance value.The present embodiment does not do any restrictions to this.
Step 104: according to current measurement voltage, current reference voltage value and current resistive value, calculating the exhausted of measurement object
Edge resistance value.
It is understood that the purpose of this step can be to be in optimum measurement in the measurement voltage value that current time acquires
When range, by calculating the insulation resistance of measurement object according to current measurement voltage, current reference voltage value and current resistive value
Value.
Specifically, for controlling equipment in this step according to current measurement voltage, current reference voltage value and current resistance
Value, calculates the concrete mode of the insulating resistance value of measurement object, can be by designer's self-setting, and such as current measurement voltage is
It, can be directly by such as when measurement voltage value (Ux) of Acquisition Circuit output shown in Fig. 2 amplified without amplifying circuit
The insulating resistance value (Rx) of lower formula calculation and measurement object:
Wherein, R1 to R4 is followed successively by the resistance value of four variable resistances in Acquisition Circuit, and Uref is variable power supply
Reference voltage value.
When current measurement voltage is amplifying circuit amplified measurement voltage value, controlling equipment can be first according to amplifying circuit
Amplification factor, determine amplification before measurement voltage value, then itself control Acquisition Circuit in variable resistance resistance
Survey is calculated in the reference voltage value (voltage value of Uref in such as Fig. 2) of value (resistance value of R1-R4 in such as Fig. 2) and variable power supply
Measure the insulating resistance value of object.The present embodiment does not do any restrictions to this.
It is corresponding, for the insulating resistance value for the measurement object that will be seen that user to be calculated, after this step also
It may include the insulating resistance value that measurement object is shown using the display equipment in human-computer interaction device and other parameters (as can be changed
The resistance value of resistor, the reference voltage value of variable power supply and measurement voltage value etc.) the step of, and will be surveyed using communication apparatus
The step of insulating resistance value and other parameters for measuring object are sent to corresponding terminal.
It should be noted that in order to guarantee measurement object using safe, method provided by the present embodiment can also be
When the insulating resistance value of measurement object is less than default early warning value, in the corresponding dangerous circuit of control measurement object such as ac contactor
The controllable switch of device, relay etc. cuts off dangerous circuit, and display equipment in human-computer interaction device and communication equipment are reported
It is alert.It may include judging whether insulating resistance value is less than default early warning value i.e. after this step；If so, disconnecting measurement object pair
The dangerous circuit answered, and the step of being alarmed using human-computer interaction device and communication equipment.
In the present embodiment, the embodiment of the present invention passes through according to current measurement voltage, calculate and adjust in Acquisition Circuit can
The resistance value of variohm and/or the reference voltage value of variable power supply
In the present embodiment, the embodiment of the present invention is by currently measurement voltage not in current reference voltage value and/or current electricity
When in the corresponding measurement range of resistance value, according to current measurement voltage, the electricity of the variable resistance in Acquisition Circuit is calculated and adjusted
It is defeated that the changeable fluid to the insulation resistance of measurement object, multivoltage may be implemented in the reference voltage value of resistance value and/or variable power supply
Enter with more bridge measurements, make to adjust measurement range to the insulation resistance value of measurement object after repeatedly measuring and exactly match,
Measurement accuracy and applicability are improved, the user experience is improved.
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 method disclosed in embodiment
Speech, since it is corresponding with system disclosed in embodiment, so being described relatively simple, related place illustrates referring to components of system as directed
?.
The detection system and method for a kind of insulation resistance provided by the present invention are described in detail above.Herein
Apply that a specific example illustrates the principle and implementation of the invention, the explanation of above example is only intended to help
Understand method and its core concept of the invention.It should be pointed out that for those skilled in the art, not taking off
, can be with several improvements and modifications are made to the present invention under the premise of from the principle of the invention, these improvement and modification also fall into this
In invention scope of protection of the claims.
Claims (10)
1. a kind of detection system of insulation resistance characterized by comprising acquisition equipment and control equipment；
The acquisition equipment includes Acquisition Circuit, for connecting with measurement object, uses bridge measurement to control equipment output
The corresponding measurement voltage of the measurement object；
The control equipment being connect with the acquisition equipment, for controlling the resistance of the variable resistance in the Acquisition Circuit
The reference voltage value of value and variable power supply, and according to the insulating resistance value for measuring voltage and calculating the measurement object.
2. the detection system of insulation resistance according to claim 1, which is characterized in that the Acquisition Circuit, comprising: first
Variable resistance, the second adjustable resistance, third variable resistance, the 4th variable resistance and variable power supply circuit；
Wherein, for the first end of first variable resistance for connecting with the first end of the measurement object, described first is variable
The second end of resistance connect the output end of its common end Yu the variable power supply circuit with the first end of the second adjustable resistance
Connection, the first end of the third variable resistance with the second end of the measurement object for connecting, the third variable resistance
Second end connect with the first end of the 4th variable resistance its common end for it is described control equipment input terminal connect,
The measurement voltage is exported to the control equipment, the of the second end of the second adjustable resistance and the 4th variable resistance
Two ends connect its common end grounding；
Corresponding, the control equipment is specifically used for controlling first variable resistance, the second adjustable resistance, the third
The reference voltage value of the resistance value and the variable power supply circuit of variable resistance and the 4th variable resistance.
3. the detection system of insulation resistance according to claim 2, which is characterized in that first variable resistance, described
The second adjustable resistance, the third variable resistance and the 4th variable resistance be specially variable number resistor, it is described can
Power transformation source circuit is specially variable number power circuit.
4. the detection system of insulation resistance according to any one of claims 1 to 3, which is characterized in that the acquisition equipment,
Further include:
Amplifying circuit sets amplified measurement voltage output to the control after amplifying to the measurement voltage
It is standby；Wherein, the measurement voltage output end of the Acquisition Circuit is connected by the input terminal of the amplifying circuit and the control equipment
It connects.
5. the detection system of insulation resistance according to claim 4, which is characterized in that further include:
The human-computer interaction device connecting with the control equipment utilizes for showing the insulating resistance value using display unit
It operates equipment and corresponding control parameter is generated according to user's operation, and be sent to the control unit.
6. the detection system of insulation resistance according to claim 4, which is characterized in that further include:
The communication equipment being connect with the control equipment, for sending corresponding terminal for the insulating resistance value.
7. a kind of detection method of insulation resistance, which is characterized in that be applied to such as insulation as claimed in any one of claims 1 to 6
The detection system of resistance, comprising:
After Acquisition Circuit is connect with measurement object, the current measurement voltage that the Acquisition Circuit is sent is obtained；
Judge the current measurement voltage whether in current reference voltage value and/or the corresponding measurement range of current resistive value；
If it is not, then calculating and adjusting the resistance value of the variable resistance in the Acquisition Circuit according to the current measurement voltage
And/or the reference voltage value of variable power supply, and execute described the step of obtaining the current measurement voltage that the Acquisition Circuit is sent；
If so, calculating the survey according to the current measurement voltage, the current reference voltage value and the current resistive value
Measure the insulating resistance value of object.
8. the detection method of insulation resistance according to claim 7, which is characterized in that described according to the current measurement electricity
Pressure, calculates and adjusts the resistance value of the variable resistance in the Acquisition Circuit and/or the reference voltage value of variable power supply, wraps
It includes:
According to the current measurement voltage and the measurement range, next measurement range is selected, and will be in the Acquisition Circuit
The resistance value of variable resistance and the reference voltage value of variable power supply be adjusted to the corresponding resistance value of next measurement range and
Voltage value.
9. the detection method of insulation resistance according to claim 7, which is characterized in that described according to the current measurement electricity
Pressure, calculates and adjusts the resistance value of the variable resistance in the Acquisition Circuit and/or the reference voltage value of variable power supply, wraps
It includes:
If the current measurement voltage is greater than the maximum value of the measurement range, next resistance value is calculated, and by the acquisition
The resistance value adjusting of variable resistance in circuit is next resistance value；Wherein, next resistance value is less than described work as
Preceding resistance value；
If the current measurement voltage is less than the minimum value of the measurement range, next resistance value is calculated, and by the acquisition
The resistance value adjusting of variable resistance in circuit is next resistance value；Wherein, next resistance value is greater than described work as
Preceding resistance value.
10. the detection method of insulation resistance according to any one of claims 7 to 9, which is characterized in that described according to
Current measurement voltage, the current reference voltage value and the current resistive value, calculate the insulating resistance value of the measurement object
Later, further includes:
Judge whether the insulating resistance value is less than default early warning value；
If so, disconnecting the corresponding dangerous circuit of the measurement object, and reported using human-computer interaction device and communication equipment
It is alert.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811544541.5A CN109406880A (en) | 2018-12-17 | 2018-12-17 | A kind of detection system and method for insulation resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811544541.5A CN109406880A (en) | 2018-12-17 | 2018-12-17 | A kind of detection system and method for insulation resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109406880A true CN109406880A (en) | 2019-03-01 |
Family
ID=65459800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811544541.5A Pending CN109406880A (en) | 2018-12-17 | 2018-12-17 | A kind of detection system and method for insulation resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109406880A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112162156A (en) * | 2020-09-22 | 2021-01-01 | 广东电网有限责任公司 | Resistance measuring device, resistance measuring method, resistance measuring apparatus, and storage medium |
| CN113608028A (en) * | 2021-09-02 | 2021-11-05 | 招商局重庆交通科研设计院有限公司 | High-precision direct current power distribution system insulation resistance monitoring circuit, detection device and monitoring method |
| CN115248345A (en) * | 2021-04-26 | 2022-10-28 | 广汽埃安新能源汽车有限公司 | High-voltage equipment insulation resistance injection device and insulation detection precision evaluation method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040108881A1 (en) * | 2002-11-29 | 2004-06-10 | Matsushita Electric Industrial Co., Ltd. | Parameter correction circuit and parameter correction method |
| KR20100083481A (en) * | 2009-01-14 | 2010-07-22 | 주식회사 이노템즈 | Multi-channel insulation resistance measuring apparatus |
| CN102798807A (en) * | 2012-08-10 | 2012-11-28 | 宁德新能源科技有限公司 | Insulation detection system capable of performing redundant allocation |
| CN104375031A (en) * | 2014-11-10 | 2015-02-25 | 南京信息工程大学 | On-line measurement device for power supply system surge protection device insulation resistance |
| CN104702208A (en) * | 2015-02-10 | 2015-06-10 | 武汉武新电气科技股份有限公司 | Photovoltaic array ground insulation resistance online detecting system for high-power photovoltaic inverter |
| CN209446673U (en) * | 2018-12-17 | 2019-09-27 | 湖南一二三智能科技有限公司 | A kind of detection system and insulation tester of insulation resistance |
-
2018
- 2018-12-17 CN CN201811544541.5A patent/CN109406880A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040108881A1 (en) * | 2002-11-29 | 2004-06-10 | Matsushita Electric Industrial Co., Ltd. | Parameter correction circuit and parameter correction method |
| KR20100083481A (en) * | 2009-01-14 | 2010-07-22 | 주식회사 이노템즈 | Multi-channel insulation resistance measuring apparatus |
| CN102798807A (en) * | 2012-08-10 | 2012-11-28 | 宁德新能源科技有限公司 | Insulation detection system capable of performing redundant allocation |
| CN104375031A (en) * | 2014-11-10 | 2015-02-25 | 南京信息工程大学 | On-line measurement device for power supply system surge protection device insulation resistance |
| CN104702208A (en) * | 2015-02-10 | 2015-06-10 | 武汉武新电气科技股份有限公司 | Photovoltaic array ground insulation resistance online detecting system for high-power photovoltaic inverter |
| CN209446673U (en) * | 2018-12-17 | 2019-09-27 | 湖南一二三智能科技有限公司 | A kind of detection system and insulation tester of insulation resistance |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112162156A (en) * | 2020-09-22 | 2021-01-01 | 广东电网有限责任公司 | Resistance measuring device, resistance measuring method, resistance measuring apparatus, and storage medium |
| CN115248345A (en) * | 2021-04-26 | 2022-10-28 | 广汽埃安新能源汽车有限公司 | High-voltage equipment insulation resistance injection device and insulation detection precision evaluation method |
| CN113608028A (en) * | 2021-09-02 | 2021-11-05 | 招商局重庆交通科研设计院有限公司 | High-precision direct current power distribution system insulation resistance monitoring circuit, detection device and monitoring method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101272130B1 (en) | Method of and device for insulation monitoring | |
| CN109406880A (en) | A kind of detection system and method for insulation resistance | |
| JP6767478B2 (en) | Improvements to the DC distance protection controller or related improvements | |
| CN102590717B (en) | Withstand voltage testing method for geographic information system (GIS) | |
| KR20180113366A (en) | Apparatus for measuring insulation deterioration of power utilities and test device thereof | |
| CN209446673U (en) | A kind of detection system and insulation tester of insulation resistance | |
| CN111044792A (en) | High-voltage cable dielectric loss live detection system and method | |
| CN105486984B (en) | A kind of direct current grounding trouble shooting method and instrument based on the control of dynamic electric potential source | |
| CN111289837B (en) | Method and system for evaluating latent fault of power distribution network equipment | |
| CN110736922B (en) | Device and method for measuring switch-on pre-breakdown time | |
| JP2019109192A (en) | Insulation monitoring device and insulation monitoring system | |
| KR100586383B1 (en) | Leakage current auto measurement apparatus | |
| CN105445627B (en) | Instrument is checked and accepted in straight-flow system insulation | |
| JP4984411B2 (en) | Insulation degradation position evaluation apparatus and method | |
| CN116466138A (en) | Device and method for integrating insulation resistance detection and insulation monitoring function verification | |
| CN115902753A (en) | CVT mobile digital test acceptance system and acceptance method | |
| RU2657867C2 (en) | Method for evaluating electrical impedance connection to ground, method for evaluating power system and corresponding power system | |
| JP2013253804A (en) | Calibrating device | |
| KR101896548B1 (en) | Wiring connection state detection system of live wire state | |
| CN111366371B (en) | Electric vehicle collision electric safety data acquisition system | |
| US20180120356A1 (en) | Current measuring method and system thereof | |
| US20230160933A1 (en) | Method and device for determining the resistive component of the leakage current impedance in the alternating current network | |
| JP5428030B1 (en) | Insulation monitoring device | |
| JP3161757B2 (en) | Power system insulation deterioration detection method, insulation deterioration detection device, insulation deterioration detection system, and insulation deterioration determination device | |
| KR20120038168A (en) | Real-time monitoring apparatus and monitoring method leakage current and insulation resistance for distributing pannel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |