CN109696582A - Insulation resistance detection circuit and its detection method - Google Patents
Insulation resistance detection circuit and its detection method Download PDFInfo
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- CN109696582A CN109696582A CN201910142012.0A CN201910142012A CN109696582A CN 109696582 A CN109696582 A CN 109696582A CN 201910142012 A CN201910142012 A CN 201910142012A CN 109696582 A CN109696582 A CN 109696582A
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- 238000001514 detection method Methods 0.000 title claims abstract description 89
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- 239000004065 semiconductor Substances 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
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- 238000004146 energy storage Methods 0.000 description 2
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- 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
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Abstract
Present invention discloses a kind of insulation resistance detection circuit and its detection methods, wherein, insulation resistance detection circuit includes insulation detecting circuit and circuit for power conversion, and the insulation detecting circuit includes a first resistor switch unit, at least one second resistance switch unit, first voltage detection unit and second voltage detection unit.In insulation resistance detection circuit, by controlling the disconnection of fling-cut switch and closed state in each circuit, different access circuits is obtained, unknown insulation impedance value is acquired on the basis of Kirchhoff's law；In this way, not only having obtained the insulation impedance value and target insulation impedance value of degree of precision, but also realize the detection to the positive and negative anodes per input light volt group all the way in multichannel input photovoltaic group to the insulation impedance of chassis shell body.
Description
Technical field
The present invention relates to technical field of solar, in particular to a kind of insulation resistance detection circuit and its detection method.
Background technique
In solar photovoltaic generation system, when working for user's energy-storage system, need photovoltaic energy storage inverter by light
The high voltage direct current that volt plate generates is introduced into system input.To ensure personal safety, prevents electric shock event from occurring, need to detect
Impedance of the photovoltaic input port to system casing, when impedance is less than limit value, system is fail to open.In the prior art, more
Road insulation resistance detection circuit can only obtain the insulation impedance total value between the photovoltaic group string anode of input and chassis shell body, and
Insulation impedance total value between the photovoltaic group string cathode and chassis shell body of input cannot be detected individually per the input of photovoltaic all the way
The impedance of solar panel positive and negative anodes is respectively to the insulation impedance value of chassis shell body.At this point, if wherein input is asked all the way
Topic, then can not find out problematic input photovoltaic group circuit in time and deal carefully with；Photovoltaic group can only be inputted according to entire multichannel
Anode the insulation impedance total value of chassis shell body is judged, and execute judging result.Therefore, it is examined in guaranteeing detection system
In the case where measuring high-precision insulation impedance value, the solar panel inputted in multichannel input system per photovoltaic all the way is being realized just
Cathode becomes increasingly important to the insulation impedance detection of chassis shell body respectively.
Summary of the invention
The main object of the present invention is to provide a kind of insulation resistance detection circuit and its detection method, is guaranteeing that high-precision is exhausted
While edge impedance detection, it is right respectively per input light volt group positive and negative anodes all the way in multichannel isolated input impedance detection system to realize
The Insulation monitoring of the insulation impedance value of chassis shell body.
The invention proposes a kind of insulation resistance detection circuits, including insulation detecting circuit and circuit for power conversion；
The insulation detecting circuit includes a first resistor switch unit, at least one second resistance switch unit, the
One voltage detection unit and second voltage detection unit；Wherein, the first resistor switch unit is connected to inverter multichannel
Between the MPPT circuit cathode PV- connect altogether and chassis shell body；The second resistance switch unit is connected to solar panel
Between positive PV+ and chassis shell body, and it is connected in parallel between the different second resistance switch units, and different for accessing
It inputs in photovoltaic group；The first voltage detection unit is connected between the positive and negative anodes of the solar panel, and is constituted too
Voltage sampling circuit between positive energy solar panel anode PV+ and cathode PV-；The second voltage detection unit is connected to described first
On resistance switch unit, and sample voltage value is provided to the first resistor switch unit；
The circuit for power conversion converts the solar into electric energy, and passes through the circuit for power conversion for the solar energy
The positive PV+ and cathode PV- of solar panel and the positive BUS+ and cathode BUS- of DC bus link together；Each described
The circuit for power conversion is all connected in input photovoltaic group where two resistance switch units.
Further, the first resistor switch unit and the second resistance switch unit, respectively by fling-cut switch with
And resistance is connected in series.
Further, the circuit for power conversion includes inductance, diode and switching tube；The inductance and two pole
Pipe is connected in series between the solar panel anode PV+ and DC bus anode BUS+, and the solar panel is negative
The pole PV- and DC bus cathode BUS- is directly connected to by conducting wire, and the switching tube is connected to the solar panel
Between cathode PV+ and PV-, and described switching tube one end is accessed between the inductance and diode, the other end access the PV- with
Between BUS-.
Further, the switching tube is one of IGBT pipe, metal-oxide-semiconductor or GTR.
Further, the fling-cut switch is one of relay, IGBT pipe or metal-oxide-semiconductor.
Further, the first voltage detection unit uses isolated differential voltage sample circuit or non-isolated
Differential voltage sample circuit.
The invention further relates to a kind of detection methods of insulation resistance detection circuit, including the solar panel cathode
There is insulation impedance between PV- and chassis shell body, and is connected in parallel with the first resistor switch unit；The solar panel
There are multiple target insulation impedances between positive PV+ and chassis shell body, and each target insulation impedance and the second resistance switch
Unit is connected in parallel；
It is described that detection method includes the following steps:
Step 1, in the corresponding target insulation impedance value of measurement target second resistance switch unit, control and the target
Other all circuit for power conversion except the target power conversion circuit of second resistance switch unit connection, so that removing the mesh
Mark other all input photovoltaic group short circuits access insulation impedances inspections inputted except photovoltaic group where second resistance switch unit
In slowdown monitoring circuit；
Step 2, the fling-cut switch in control closure first resistor switch unit, obtains the detection of second voltage detection unit
Voltage value is Va；
Step 3, control is closed the fling-cut switch in the target second resistance switching unit, and it is single to obtain second voltage detection
The voltage value of member detection is Vb；
Step 4, voltage V, the first resistor switch unit detected in advance according to the Va, Vb, first voltage detection unit
In resistance and target second resistance switch unit in resistance, calculate the corresponding mesh of the target second resistance switch unit
Mark insulation impedance value.
Further, described the step of calculating the target second resistance switch unit corresponding target insulation impedance value it
Afterwards, further includes:
Calculate other all input lights in addition to the input photovoltaic group where the target second resistance switch unit
The insulation impedance value in parallel of volt group short circuit insulation impedance parallel connection corresponding with first resistor switch unit when accessing.
Further, in the step 4, the corresponding target insulation impedance of the target second resistance switch unit is calculated
The formula of value are as follows:
Simultaneous formula one and formula two can find out known variables Xx and Xy, wherein Xy is that the switching of target second resistance is single
The corresponding target insulation impedance value of member, Xx are its in addition to the input photovoltaic group where the target second resistance switch unit
The insulation impedance in parallel of insulation impedance parallel connection corresponding with first resistor switch unit when its all input photovoltaic group short circuit access
Value；Rr is the resistance in first resistor switch unit, and Rs is the resistance in second resistance switch unit.
Compared with prior art, the invention has the following advantages:
The present invention passes through control when realizing that the insulation impedance value to multichannel MPPT input photovoltaic group inverter detects
Circuit for power conversion, so that other all inputs in addition to the input photovoltaic group where the target second resistance switch unit
Photovoltaic group short circuit accesses in insulation resistance detection circuit；Then in insulation resistance detection circuit, by controlling in each circuit
The disconnection of fling-cut switch and closed state obtain different access circuits, acquire on the basis of Kirchhoff's law unknown exhausted
Edge impedance value；In this way, not only having obtained the insulation impedance value and target insulation impedance value of degree of precision, but also realizes and multichannel is inputted
Detection of the positive and negative anodes of every input light volt group all the way in photovoltaic group to the insulation impedance value of chassis shell body.
Detailed description of the invention
Fig. 1 is the single channel input circuit figure in an a kind of embodiment of insulation resistance detection circuit proposed by the present invention；
Fig. 2 is the multi-channel input circuit figure in an a kind of embodiment of insulation resistance detection circuit proposed by the present invention；
Fig. 3 is the circuit for power conversion figure in an a kind of embodiment of insulation resistance detection circuit proposed by the present invention；
Fig. 4 is a kind of step schematic diagram of the detection method of insulation resistance detection circuit proposed by the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
For convenience of description, the present invention is described in further details with reference to the accompanying drawing, attached drawing is only a reality of the invention
Apply example:
Referring to Fig. 1-3, the present invention provides a kind of embodiment of insulation resistance detection circuit, including insulation detecting circuit with
And circuit for power conversion；The insulation detecting circuit includes a first resistor switch unit 1, the switching of at least one second resistance
Unit 2, first voltage detection unit and second voltage detection unit 22.Wherein, the first resistor switch unit 1 is connected to inverse
Become between the device multichannel MPPT circuit cathode PV- connect altogether and chassis shell body；The second resistance switch unit 2 is connected to solar energy
Between the positive PV+ and chassis shell body of solar panel, and it is connected in parallel between the different second resistance switch units 2, and be used for
It accesses in different input photovoltaic groups.In this way, just each per input light volt group all the way do not influenced by other roads input photovoltaic group, i.e.,
Just have and damage all the way, other roads still can be used.The first voltage detection unit is connected to the solar panel
Between positive and negative anodes, and constitute the voltage sampling circuit between solar panel anode PV+ and cathode PV-.In entire Insulation monitoring
In circuit, voltage value detected by solar panel positive and negative anodes is definite value and provides data in subsequent calculating.Described
Two voltage detection units 22 are connected on the first resistor switch unit 1, and are adopted to the first resistor switch unit 1 offer
Sample voltage value.Thus it can realize that different access circuits are brought by the switch in control access insulating resistor detecting circuit
Electric current transformation, by this small current transformation according to Kirchhoff's law simultaneous equation with two unknowns, and then obtain institute
The insulation impedance value that need to be detected.
The invention also includes circuit for power conversion, convert the solar into electric energy by the circuit for power conversion, for
Family uses.In actual circuit, the positive PV+ and cathode PV- of the solar panel and the positive BUS+ of DC bus and
Cathode BUS- is linked together by the circuit for power conversion, and is formed an electric energy and saved area.It in the present invention, is guarantee
Per the convenience of the safety of input light volt group and user power utilization all the way, in each 2 institute of second resistance switch unit
Input photovoltaic group in be all connected with the circuit for power conversion.
In the present invention, the first resistor switch unit and the second resistance switch unit, respectively by fling-cut switch S
And resistance is connected in series.To guarantee the safety of detection circuit, and expand the detection range of detection circuit, in the present embodiment
The resistance of resistance switch unit is first resistor R and the concatenated total value of second resistance R '.It is described in first resistor switch unit
Fling-cut switch S1, the first resistor Rr1 and the second resistance Rr2 are connected in series.It is described in second resistance switch unit
Fling-cut switch S2, the first resistor Rs3 and the second resistance Rs4 are connected in series.
In the present invention, the circuit for power conversion includes inductance L, diode D and switching tube Q；The inductance L and institute
It states diode D to be connected in series between the solar panel anode PV+ and DC bus anode BUS+, the solar-electricity
The pond plate cathode PV- and DC bus cathode BUS- is directly connected to by conducting wire, and the switching tube Q is connected to the solar energy
Between solar panel cathode PV+ and PV-, and the one end the switching tube Q is accessed between the series inductance L and diode D, the other end
It accesses between the PV- and BUS-.In the present embodiment, circuit is accessed by the switching tube Q controlled in the circuit for power conversion
Ratio, the short circuit of Lai Shixian insulation detecting circuit, so as to acquire per input light volt group positive and negative anodes all the way to chassis shell body
Insulation impedance value.
The present invention provides a kind of insulation resistance detection circuit, described includes switching tube Q using IGBT pipe, metal-oxide-semiconductor or GTR
One of.Switching tube selection IGBT pipe in the present embodiment.
The present invention provides a kind of insulation resistance detection circuit, the fling-cut switch is in relay, IGBT pipe or metal-oxide-semiconductor
One kind.Relay is used in the present embodiment.
Further, the heretofore described first voltage detection unit using isolated differential voltage sample circuit or
Non-isolated differential voltage sample circuit.
Referring to fig. 4, the present invention also provides a kind of detection method of insulation impedance, the solar panel cathode PV-
There is insulation impedance value Xx between chassis shell body, and is connected in parallel with the first resistor switch unit 1；The solar battery
There are multiple target insulation impedance value Xy between plate anode PV+ and chassis shell body, and each target insulation impedance value Xy and described the
Two resistance switch units 2 are connected in parallel；
It is described that detection method includes the following steps:
Step 1, when measuring 2 corresponding target insulation impedance value Xy of target second resistance switch unit, control with it is described
Other all circuit for power conversion except the target power conversion circuit that target second resistance switch unit 2 connects, so that removing
Other all input photovoltaic group short circuit access insulation except input photovoltaic group where the target second resistance switch unit 2
In impedance detection circuit；
Step 2, the fling-cut switch S1 in control closure first resistor switch unit 1, obtains second voltage detection unit 22
The voltage value of detection is Va；
Step 3, control is closed the fling-cut switch S2 in the target second resistance switching unit 2, obtains second voltage inspection
Surveying the voltage value that unit 22 detects is Vb；
Step 4, voltage V, the first resistor switch unit 1 detected in advance according to the Va, Vb, first voltage detection unit
In first resistor Rr1, second resistance Rr2, the first resistor Rs3 in target second resistance switch unit 2 and second resistance
Rs4 calculates the corresponding target insulation impedance value Xy of the target second resistance switch unit 2.
In the present embodiment, keep its ascending in the ratio of circuit by the switching tube Q in control circuit for power conversion
Access circuit, the short circuit between PV+ to the PV- in circuit may be implemented, thus will input the short circuit of photovoltaic group access insulation inspection
Slowdown monitoring circuit realizes detection.After being measured, S1, S2 are disconnected, the access of detection route is avoided to influence the impedance of machine over the ground.
In the present invention, described the step of calculating the target second resistance switch unit corresponding target insulation impedance value
Later, further includes: calculate other all defeated in addition to the input photovoltaic group where the target second resistance switch unit
Enter the insulation impedance value Xx ' in parallel of insulation impedance parallel connection corresponding with first resistor switch unit when photovoltaic group short circuit access.
Further, a kind of detection method of insulation impedance detection is provided in the present invention, it is in the present embodiment, described
Second voltage detection unit 22 detects the voltage value at the both ends first resistor Rr in the first resistor switch unit 1, described
In step 4, the formula of the corresponding target insulation impedance value Xy of the target second resistance switch unit 2 is calculated are as follows:
For convenience of calculating, in one embodiment, enableRr1=Rs3=Rs5=Rs
(2n+1), Rr2=Rs4=Rs6=Rs (2n+2),
Simultaneous formula one and formula two, can obtain,
Wherein, Xy is the corresponding target insulation impedance value of second resistance switch unit 2, and Xx ' is except second electricity of target
The other all input photovoltaic group short circuits inputted except photovoltaic group where hindering switch unit 2 are single with first resistor switching when accessing
The insulation impedance value in parallel of first 1 corresponding insulation impedance parallel connection；Rr1 is the first resistor value in first resistor switch unit, Rr2
For the second resistance value in first resistor switch unit, Rs1 is the first resistor value in second resistance switch unit, Rs2 the
Second resistance value in two resistance switch units.
Different input photovoltaic group detection circuit for access is controlled, and repeats algorithm above, is acquired per input light volt group all the way
In target insulation impedance value, then by formula of mathematical, insulation corresponding with first resistor switch unit can be calculated
Impedance value Xx.
In conclusion the present invention provides a kind of insulating resistor detecting circuit and its detection methods.The present invention is in realization pair
When the insulation impedance resistance value of multichannel MPPT input photovoltaic group inverter is detected, by controlling circuit for power conversion, so that
Other all input photovoltaic group short circuit accesses in addition to the input photovoltaic group where the target second resistance switch unit are exhausted
In edge impedance detection circuit；Then in insulation resistance detection circuit, by control in each circuit the disconnection of fling-cut switch with
Closed state obtains different access circuits, and unknown insulation impedance value is acquired on the basis of Kirchhoff's law；In this way, both
Obtained the insulation impedance value and target insulation impedance value of degree of precision, but realize in multichannel input photovoltaic group per all the way
Detection of the positive and negative anodes of input photovoltaic group to the insulation impedance value of chassis shell body.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (9)
1. a kind of insulation resistance detection circuit, which is characterized in that including insulation detecting circuit and circuit for power conversion；
The insulation detecting circuit includes a first resistor switch unit, at least one second resistance switch unit, the first electricity
Press detection unit and second voltage detection unit；Wherein, the first resistor switch unit is connected to inverter multichannel MPPT electricity
Between the road cathode PV- connect altogether and chassis shell body；The second resistance switch unit is connected to the positive PV+ of solar panel
It is connected in parallel between chassis shell body, and between the different second resistance switch units, and for accessing different input lights
Fu Zuzhong；The first voltage detection unit is connected between the positive and negative anodes of the solar panel, and constitutes solar-electricity
Voltage sampling circuit between pond plate anode PV+ and cathode PV-；The second voltage detection unit is connected to the first resistor and cuts
It changes on unit, and provides sample voltage value to the first resistor switch unit；
The circuit for power conversion converts the solar into electric energy, and passes through the circuit for power conversion for the solar battery
The positive PV+ and cathode PV- of plate and the positive BUS+ and cathode BUS- of DC bus link together；Each described second electricity
The circuit for power conversion is all connected in input photovoltaic group where resistance switch unit.
2. insulation resistance detection circuit according to claim 1, which is characterized in that the first resistor switch unit and institute
Second resistance switch unit is stated, is connected in series respectively by fling-cut switch and resistance.
3. insulation resistance detection circuit according to claim 2, which is characterized in that the circuit for power conversion includes electricity
Sense, diode and switching tube；The inductance and the Diode series are connected to the solar panel anode PV+ and straight
It flows between bus anode BUS+, the solar panel cathode PV- and DC bus cathode BUS- is direct by conducting wire
Connection, the switching tube are connected between solar panel the cathode PV+ and PV-, and institute is accessed in described switching tube one end
It states between inductance and diode, the other end accesses between the PV- and BUS-.
4. insulation resistance detection circuit according to claim 3, which is characterized in that the switching tube is IGBT pipe, metal-oxide-semiconductor
Or one of GTR.
5. insulation resistance detection circuit according to claim 2, which is characterized in that the fling-cut switch be relay,
One of IGBT pipe or metal-oxide-semiconductor.
6. insulation resistance detection circuit according to claim 1, which is characterized in that the first voltage detection unit
Using isolated differential voltage sample circuit or non-isolated differential voltage sample circuit.
7. a kind of detection method using insulation impedance circuit described in any one of claim 2-6, which is characterized in that described
There is insulation impedance between solar panel cathode PV- and chassis shell body, and is connected in parallel with the first resistor switch unit；
Have multiple target insulation impedances between the solar panel anode PV+ and chassis shell body, and each target insulation impedance with
The second resistance switch unit is connected in parallel；
It is described that detection method includes the following steps:
Step 1, in the corresponding target insulation impedance value of measurement target second resistance switch unit, control and the target second
Other all circuit for power conversion except the target power conversion circuit of resistance switch unit connection, so that except the target the
Other all input photovoltaic group short circuit access insulation impedance detection electricity except input photovoltaic group where two resistance switch units
Lu Zhong；
Step 2, the fling-cut switch in control closure first resistor switch unit, obtains the voltage of second voltage detection unit detection
Value is Va；
Step 3, control is closed the fling-cut switch in the target second resistance switching unit, obtains the inspection of second voltage detection unit
The voltage value of survey is Vb；
Step 4, in the voltage V that is detected in advance according to the Va, Vb, first voltage detection unit, first resistor switch unit
It is exhausted to calculate the corresponding target of the target second resistance switch unit for resistance in resistance and target second resistance switch unit
Edge impedance value.
8. the detection method of insulation impedance circuit according to claim 7, which is characterized in that described to calculate the target second
After the step of resistance switch unit corresponding target insulation impedance value, further includes:
Calculate other all input photovoltaic groups in addition to the input photovoltaic group where the target second resistance switch unit
The insulation impedance value in parallel of insulation impedance parallel connection corresponding with first resistor switch unit when short circuit access.
9. the detection method of insulation impedance circuit according to claim 7, which is characterized in that in the step 4, calculate institute
State the formula of the corresponding target insulation impedance value of target second resistance switch unit are as follows:
Simultaneous formula one and formula two can find out known variables Xx and Xy, wherein Xy is target second resistance switch unit pair
The target insulation impedance value answered, Xx are other institutes in addition to the input photovoltaic group where the target second resistance switch unit
There is the insulation impedance value in parallel of input photovoltaic group short circuit insulation impedance parallel connection corresponding with first resistor switch unit when accessing；Rr
For the resistance in first resistor switch unit, Rs is the resistance in second resistance switch unit.
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| CN110504669A (en) * | 2019-08-09 | 2019-11-26 | 珠海格力电器股份有限公司 | Control method and device of photovoltaic circuit and photovoltaic combiner box |
| CN110703122A (en) * | 2019-10-15 | 2020-01-17 | 阳光电源股份有限公司 | Electrochemical energy storage system and insulation detection method thereof |
| CN111983316A (en) * | 2020-07-29 | 2020-11-24 | 江苏固德威电源科技股份有限公司 | ISO detection method and device |
| WO2021017687A1 (en) * | 2019-07-26 | 2021-02-04 | 华为技术有限公司 | Insulation impedance detection circuit, and method |
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| WO2022165691A1 (en) * | 2021-02-04 | 2022-08-11 | 华为数字能源技术有限公司 | Impedance measurement method and photovoltaic system |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621394A (en) * | 2012-03-30 | 2012-08-01 | 广东易事特电源股份有限公司 | System and method for detecting insulation resistance to ground of dual-branch input photovoltaic grid-connected inverter |
| CN102967766A (en) * | 2012-11-23 | 2013-03-13 | 广东易事特电源股份有限公司 | Non-switch-tube detection system and method for ground insulation resistance of dual-path photovoltaic inverter |
| CN104049136A (en) * | 2013-03-11 | 2014-09-17 | 欣旺达电子股份有限公司 | High voltage cell set system isolation total voltage and insulation resistance detection circuit and detection method thereof |
| CN204758699U (en) * | 2015-05-22 | 2015-11-11 | 江苏固德威电源科技有限公司 | A insulating impedance detection circuitry for photovoltaic inverter |
| CN105356848A (en) * | 2015-11-17 | 2016-02-24 | 江苏固德威电源科技股份有限公司 | Multipath MPPT input photovoltaic inverter insulation impedance detection device and method |
| CN105785133A (en) * | 2016-04-15 | 2016-07-20 | 易事特集团股份有限公司 | Insulation resistance to ground detecting circuit, method and device for dual-path photovoltaic inverter |
| CN107305224A (en) * | 2016-04-19 | 2017-10-31 | 台达电子企业管理（上海）有限公司 | Insulation resistance detection circuit, detection method and the photovoltaic DC-to-AC converter of photovoltaic DC-to-AC converter |
| CN108427038A (en) * | 2017-12-22 | 2018-08-21 | 深圳市中兴昆腾有限公司 | A kind of multichannel input photovoltaic DC-to-AC converter ground insulation impedance detection |
-
2019
- 2019-02-26 CN CN201910142012.0A patent/CN109696582A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621394A (en) * | 2012-03-30 | 2012-08-01 | 广东易事特电源股份有限公司 | System and method for detecting insulation resistance to ground of dual-branch input photovoltaic grid-connected inverter |
| CN102967766A (en) * | 2012-11-23 | 2013-03-13 | 广东易事特电源股份有限公司 | Non-switch-tube detection system and method for ground insulation resistance of dual-path photovoltaic inverter |
| CN104049136A (en) * | 2013-03-11 | 2014-09-17 | 欣旺达电子股份有限公司 | High voltage cell set system isolation total voltage and insulation resistance detection circuit and detection method thereof |
| CN204758699U (en) * | 2015-05-22 | 2015-11-11 | 江苏固德威电源科技有限公司 | A insulating impedance detection circuitry for photovoltaic inverter |
| CN105356848A (en) * | 2015-11-17 | 2016-02-24 | 江苏固德威电源科技股份有限公司 | Multipath MPPT input photovoltaic inverter insulation impedance detection device and method |
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