CN113777518B - DC system insulation device on-line tester - Google Patents
DC system insulation device on-line tester Download PDFInfo
- Publication number
- CN113777518B CN113777518B CN202110931638.7A CN202110931638A CN113777518B CN 113777518 B CN113777518 B CN 113777518B CN 202110931638 A CN202110931638 A CN 202110931638A CN 113777518 B CN113777518 B CN 113777518B
- Authority
- CN
- China
- Prior art keywords
- alternating current
- module
- direct
- resistor
- contact
- 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.)
- Active
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 47
- 230000000903 blocking effect Effects 0.000 claims abstract description 29
- 230000008878 coupling Effects 0.000 claims abstract description 21
- 238000010168 coupling process Methods 0.000 claims abstract description 21
- 238000005859 coupling reaction Methods 0.000 claims abstract description 21
- 239000003990 capacitor Substances 0.000 claims description 16
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 9
- 229910052744 lithium Inorganic materials 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
Classifications
-
- 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
- G01R31/40—Testing power supplies
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses an online tester for an insulation device of a direct current system, which solves the problems that in the prior art, series connection and mixed connection faults of an alternating current power supply system and a direct current power supply system cannot be fed back in time, relay misoperation is easy to occur, leakage danger is easy to occur, and accidents are enlarged, and comprises a power supply module, a direct current output module, an alternating current component detection module and a load; the output end of the power supply module is respectively connected with the direct current output module and the alternating current component detection module; the alternating current component detection module comprises an alternating current input, a main power switch, an alternating current power switch, a voltage regulator and a transformer which are connected in sequence; the alternating current component detection module further comprises an alternating current direct serial module, an alternating current blocking serial module and an alternating current coupling serial module. The invention accurately detects and prompts the alternating current component, improves the insulation detection performance of the direct current system, and prevents the bus power frequency from being interfered, the battery life from being damaged and the electric leakage accident from happening.
Description
Technical Field
The invention relates to the technical field of insulation test, in particular to an on-line tester for an insulation device of a direct current system.
Background
When the transformer substation, the communication machine room and the data center are comprehensively wired, direct current power supplies, such as a communication power supply, a device power supply and an electric operation power supply, are arranged in a crossed mode, and the situation that an alternating current power supply system and an alternating current power supply system are connected in series and in a mixed mode is likely to occur. In relay protection field experiments, in order to simulate the action of external loops, some loops are often required to be short-circuited, and an alternating current live terminal and a direct current live terminal can be mixed and connected by mistake.
The AC and DC power supply systems are connected in series and in series, the power frequency interference of the DC bus is introduced, the service life of the storage battery is damaged, relay protection misoperation or refusal operation can be caused, and the insulation detection of the DC system is in false alarm, so that the AC and DC power supply systems are connected in series and in series directly influence the safe operation of the DC power supply system, therefore, the AC component of the bus voltage of the DC power supply system needs to be detected on line in real time, and when the AC and DC power supply systems are connected in series and in series, the fault is detected in series, the alarm is timely and reliably, and a basis is necessary for the maintenance personnel to find the fault. The existing insulation monitoring device of the direct current system cannot accurately detect alternating current components in the system, cannot feed back the alternating current components in time under the working conditions of series connection and mixed connection, and is extremely easy to cause misoperation of a relay to influence the safety of the system in a transformer substation.
At present, two filter capacitors with higher withstand voltage are respectively and directly connected between positive bus and negative bus and ground, and direct current voltage is isolated to ground to realize detection of alternating current components of positive bus and negative bus, so that the capacitor with high withstand voltage has high cost and large volume, is unfavorable for being arranged in a narrow detection module, has low reliability, influences the insulation detection performance of a direct current system, and is equivalent to increasing the distributed capacitance of the direct current power system, influences the insulation detection performance of the direct current power system.
Disclosure of Invention
The invention provides an on-line tester for an insulation device of a direct current system, which aims to solve the problems that series connection and mixed connection faults of the alternating current and direct current power supply systems in the prior art cannot be fed back in time, relay misoperation is easy to occur, leakage danger is easy to occur and accidents are expanded.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an on-line tester for a DC system insulation device comprises a power supply module, a DC output module, an AC component detection module and a load;
the output end of the power supply module is respectively connected with the direct current output module and the alternating current component detection module;
the alternating current component detection module comprises an alternating current input, a main power switch, an alternating current power switch, a voltage regulator and a transformer which are connected in sequence;
the alternating current component detection module further comprises an alternating current direct serial module, an alternating current blocking serial module and an alternating current coupling serial module;
the alternating current direct serial module comprises a resistor and an indicator lamp for prompting;
the alternating current blocking serial module comprises a blocking capacitor;
the alternating current coupling serial-in module comprises a switch;
the alternating current direct series connection module and the alternating current blocking series connection module are in parallel connection; the parallel circuit formed by the alternating current direct serial module and the alternating current blocking serial module and the alternating current coupling serial module are both positioned between the rear end of the transformer and the output end of the alternating current component detection module.
The main working modules of the invention comprise direct AC access, direct AC blocking access and AC coupling, detect and prompt AC components, improve the insulation detection performance of a DC system, and prevent bus power frequency from being interfered, battery life from being damaged and electric leakage from occurring.
Preferably, the AC component detecting module is connected to the output end of the power module and is also connected to the AC220V input, the AC component detecting module includes a fuse FU0, a main power switch S1, a fuse FU6, an AC power switch S12, a voltage regulator TY, a transformer T, a switch S13, a delay contact Kt3, a resistor R5, a resistor R16, a contact X17, a protection resistor R1, a contact X18, a resistor R19, a switch S11 and a normally open contact K4, the output end of the AC component detecting module is formed by a contact X19 and a contact X20, the contact X20 is grounded, and the contact X19 is connected to the load bus in a positive direction or a negative direction;
the AC220V input is a triangular power supply, one end of the AC220V input is grounded, the live wire end of the AC220V input is connected with one end of a fuse F0, the AC220V input is connected with one end of a main switch S1 after passing through the fuse F0, the other end of the main switch S1 is connected with one end of an alternating current power switch S12, the other end of the alternating current power switch S12 is connected with the input end of a transformer T after passing through a voltage regulator TY, the voltage regulating end of the transformer T is connected with one end of a switch S13, the other end of the switch S13 is connected with a contact X16, and the other end of the transformer T is connected with one end of a protection resistor R1;
the contact X16 is also connected with one end of a delay contact Kt3, one end of a resistor R15 and the input end of the AC coupling serial-in module; the other end of the resistor R15 is respectively connected with the other end of the delay contact Kt3 and one end of the resistor R16, and the other end of the resistor R16 is respectively connected with the input end of the alternating current direct serial module and the input end of the alternating current direct serial module; the output end of the alternating current direct serial-in module is respectively connected with the output end of the alternating current direct-blocking serial-in module, the output end of the alternating current coupling serial-in module, one end of the normally open contact K4, one end of the resistor R19 and one end of the voltmeter V7;
the other end of the resistor R19 is connected with the other end of the switch S11; the other end of the normally open contact K4 is connected with a contact X19; the normally open contact K4 is controlled by the contactor K4;
the other end of the voltmeter V7 is connected with the other end of the protection resistor R1, one end of the switch S11 and the contact X20 respectively.
The alternating current direct serial module indicator lamp is used for prompting alternating current components;
the alternating current blocking module isolates the direct current component through a capacitor C11 and only allows the alternating current component to pass through;
the ac component and the dc component pass through the system simultaneously when switch Kc is closed.
The resistor R19 is coupled with the high-resistance serial input, and the alternating current output is 0-100V.
Preferably, the output voltage of the component detection module is 0-100V.
Preferably, the alternating current direct serial module comprises an indicator lamp HX8, a resistor R18 and a normally closed contact K4, the input end of the alternating current direct serial module is one end of the indicator lamp HX8, the other end of the indicator lamp HX8 is connected with one end of the resistor R18, one end of the resistor R18 is connected with one end of the normally closed contact K4, the other end of the normally closed contact K4 is connected with the output end of the alternating current direct serial module, and the normally closed contact K4 is controlled by the contactor K4.
Preferably, the ac blocking string input module includes a capacitor C11 and a resistor R17, one end of the capacitor C11 is connected to the input end of the ac blocking string input module, the other end of the capacitor C11 is connected to one end of the resistor R17, and the other end of the resistor R17 is connected to the output end of the ac blocking string input module.
Preferably, the resistor R17 is a protection resistor.
Preferably, the ac coupling serial module includes a switch Kc, one end of the switch Kc is connected with the contact 16 to be used as an input end of the ac direct serial module, and the other end of the switch Kc is connected with an output end of the ac direct serial module.
Preferably, the power module comprises a meter power supply, a built-in lithium battery, a contact K0, a contactor K0, a charger, an AC/DC power module, a fuse FU1 and a contact S2, wherein a direct-current power VCC is respectively connected with one end of the contact K0 and the power input end of the meter, the other end of the contact K0 is selectively connected with the AC/DC power module, the built-in lithium battery and the charger, the output end of the AC/DC power module is connected between a total power switch and an alternating-current power switch of the alternating-current component detection module, the charger is connected with the built-in lithium battery in parallel, and the output end of the charger is connected between the alternating-current input and the total power switch of the alternating-current component detection module through the contact S2 and the fuse FU 1.
Preferably, the direct current output module comprises a fuse FU2, a direct current power switch S3, an AC/DC switching power supply, a voltmeter V2 and an ammeter A3;
one end of the fuse FU2 is used as the output end of the direct current output module and is connected between the main power switch and the alternating current power switch of the alternating current component detection module; the other end of the fuse FU2 is connected with one end of an AC/DC switching power supply through a DC power supply switch S3, and the other end of the AC/DC switching power supply is used for measuring DC output data through a voltmeter V2 and an ammeter A3.
Preferably, the DC output data is DC:0 to 280V,2A.
Therefore, the invention has the following beneficial effects:
the invention mainly works through an alternating current component detection module to detect alternating current components and direct current components at the front end of a load, and detects voltage and current through the voltmeter V7, the voltmeter V2 and the ammeter A3, calculates alternating current components and direct current components in the system, and timely and reliably alarms when the alternating current power supply system and the direct current power supply system are in series connection and in mixed connection with faults, thereby providing basis for maintenance personnel to find faults and ensuring safe operation of the direct current power supply.
Drawings
Fig. 1 is a schematic diagram of the present embodiment.
In the figure: 1. the meter power supply comprises a power supply module 101, a meter power supply 102, an AC/DC power supply module 103, a charger 2, a DC output module 201, an AC/DC switching power supply 3, an AC component detection module 301, an AC direct series connection module 302, an AC blocking series connection module 303 and an AC coupling series connection module.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
Example 1:
the embodiment provides an on-line tester for a DC system insulation device, which is shown in fig. 1, and comprises a power supply module 1, a DC output module 2, an AC component detection module 3 and a load;
the output end of the power supply module is respectively connected with the direct current output module and the alternating current component detection module;
the alternating current component detection module 3 comprises an alternating current input, a main power switch, an alternating current power switch, a voltage regulator and a transformer which are connected in sequence;
the alternating current component detection module further comprises an alternating current direct serial module 301, an alternating current blocking serial module 302 and an alternating current coupling serial module 303;
the alternating current direct serial module comprises a resistor and an indicator lamp for prompting;
the alternating current blocking serial module comprises a blocking capacitor;
the alternating current coupling serial-in module comprises a switch;
the alternating current direct series connection module and the alternating current blocking series connection module are in parallel connection; the parallel circuit formed by the alternating current direct serial module and the alternating current blocking serial module and the alternating current coupling serial module are both positioned between the rear end of the transformer and the output end of the alternating current component detection module.
The alternating current component detection module is connected with the output end of the power supply module and is also connected with an AC220V input, the alternating current component detection module comprises a fuse FU0, a main power switch S1, a fuse FU6, an alternating current power switch S12, a voltage regulator TY, a transformer T, a switch S13, a delay contact Kt3, a resistor R5, a resistor R16, a contact X17, a protection resistor R1, a contact X18, a resistor R19, a switch S11 and a normally open contact K4, the output end of the alternating current component detection module is composed of a contact X19 and a contact X20, the contact X20 is grounded, and the contact X19 is connected with a load bus positively or negatively;
the AC220V input is a triangular power supply, one end of the AC220V input is grounded, the live wire end of the AC220V input is connected with one end of a fuse F0, the AC220V input is connected with one end of a main switch S1 after passing through the fuse F0, the other end of the main switch S1 is connected with one end of an alternating current power switch S12, the other end of the alternating current power switch S12 is connected with the input end of a transformer T after passing through a voltage regulator TY, the voltage regulating end of the transformer T is connected with one end of a switch S13, the other end of the switch S13 is connected with a contact X16, and the other end of the transformer T is connected with one end of a protection resistor R1;
the contact X16 is also connected with one end of a delay contact Kt3, one end of a resistor R15 and the input end of the AC coupling serial-in module; the other end of the resistor R15 is respectively connected with the other end of the delay contact Kt3 and one end of the resistor R16, and the other end of the resistor R16 is respectively connected with the input end of the alternating current direct serial module and the input end of the alternating current direct serial module; the output end of the alternating current direct serial-in module is respectively connected with the output end of the alternating current direct-blocking serial-in module, the output end of the alternating current coupling serial-in module, one end of the normally open contact K4, one end of the resistor R19 and one end of the voltmeter V7;
the other end of the resistor R19 is connected with the other end of the switch S11; the other end of the normally open contact K4 is connected with a contact X19; the normally open contact K4 is controlled by the contactor K4;
the other end of the voltmeter V7 is connected with the other end of the protection resistor R1, one end of the switch S11 and the contact X20 respectively.
The alternating current direct serial module 301 comprises an indicator lamp HX8, a resistor R18 and a normally closed contact K4, wherein the input end of the alternating current direct serial module is one end of the indicator lamp HX8, the other end of the indicator lamp HX8 is connected with one end of the resistor R18, one end of the resistor R18 is connected with one end of the normally closed contact K4, the other end of the normally closed contact K4 is connected with the output end of the alternating current direct serial module, and the normally closed contact K4 is controlled by the contactor K4.
The ac blocking string input module 302 includes a capacitor C11 and a resistor R17, one end of the capacitor C11 is connected to the input end of the ac blocking string input module, the other end of the capacitor C11 is connected to one end of the resistor R17, and the other end of the resistor R17 is connected to the output end of the ac blocking string input module. Resistor R17 is a protection resistor and is negligible.
The ac coupling serial module comprises a switch Kc, one end of the switch Kc is connected with the contact 16 to serve as an input end of the ac direct serial module, and the other end of the switch Kc is connected with an output end of the ac direct serial module.
The power module 1 comprises a meter power supply 101, a built-in lithium battery, a contact K0, a contactor K0, a charger 103, an AC/DC power module 10, a fuse FU1 and a contact S2, wherein a direct current power VCC is respectively connected with one end of the contact K0 and the power input end of the meter, the other end of the contact K0 is selectively connected with the AC/DC power module, the built-in lithium battery and the charger, the output end of the AC/DC power module is connected between a main power switch and an alternating current power switch of the alternating current component detection module, the charger is connected with the built-in lithium battery in parallel, and the output end of the charger is connected between the alternating current input and the main power switch of the alternating current component detection module through the contact S2 and the fuse FU 1.
The direct current output module comprises a fuse FU2, a direct current power switch S3, an AC/DC switching power supply 201, a voltmeter V2 and an ammeter A3;
one end of the fuse FU2 is used as the output end of the direct current output module and is connected between the main power switch and the alternating current power switch of the alternating current component detection module; the other end of the fuse FU2 is connected with one end of an AC/DC switching power supply through a DC power supply switch S3, and the other end of the AC/DC switching power supply is used for measuring DC output data through a voltmeter V2 and an ammeter A3.
The direct current output data is DC:0 to 280V,2A.
The alternating current direct serial module indicator lamp is used for prompting alternating current components;
the alternating current blocking module isolates the direct current component through a capacitor C11 and only allows the alternating current component to pass through;
the ac component and the dc component pass through the system simultaneously when switch Kc is closed.
The resistor R19 is coupled with the high-resistance serial input, and the alternating current output is 0-100V, the alternating current component and the direct current component at the front end of the load are detected mainly through the alternating current component detection module, the voltage and the current are detected through the voltmeter V7, the voltmeter V2 and the ammeter A3, the alternating current component and the direct current component in the system are calculated, and when the alternating current power supply system and the direct current power supply system are in series connection and in hybrid connection, the alarm is timely and reliably given, so that a basis is provided for troubleshooting by an maintainer, and the safe operation of the direct current power supply is ensured.
The foregoing embodiments are provided for further explanation of the present invention and are not to be construed as limiting the scope of the present invention, and some insubstantial modifications and variations of the present invention, which are within the scope of the invention, will be suggested to those skilled in the art in light of the foregoing teachings.
Claims (12)
1. The on-line tester for the DC system insulation device is characterized by comprising a power supply module, a DC output module, an AC component detection module and a load;
the output end of the power supply module is respectively connected with the direct current output module and the alternating current component detection module;
the alternating current component detection module comprises an alternating current input, a main power switch, an alternating current power switch, a voltage regulator and a transformer which are connected in sequence;
the alternating current component detection module further comprises an alternating current direct serial module, an alternating current blocking serial module and an alternating current coupling serial module;
the alternating current direct serial module comprises a resistor and an indicator lamp for prompting;
the alternating current blocking serial module comprises a blocking capacitor;
the alternating current coupling serial-in module comprises a switch;
the alternating current direct series connection module and the alternating current blocking series connection module are in parallel connection; the parallel circuit and the alternating current coupling serial module which are formed by the alternating current direct serial module and the alternating current blocking serial module are both positioned between the rear end of the transformer and the output end of the alternating current component detection module;
the alternating current component detection module comprises a delay joint Kt3, a resistor R15, a resistor R16, a joint X16 and a joint X17, wherein the joint X16 is also connected with one end of the delay joint Kt3, one end of the resistor R15 and the input end of the alternating current coupling serial-in module; the other end of the resistor R15 is connected with the other end of the delay contact Kt3 and one end of the resistor R16 respectively, and the other end of the resistor R16 is connected with the input end of the alternating current direct series module and the input end of the alternating current direct series module respectively.
2. The on-line tester for insulation devices of direct current systems according to claim 1, wherein the alternating current component detection module is connected with an output end of a power module and is also connected with an input of an AC220V, the alternating current component detection module comprises a fuse FU0, a main power switch S1, a fuse FU6, an alternating current power switch S12, a voltage regulator TY, a transformer T, a switch S13, a protection resistor R1, a contact X18, a resistor R19, a switch S11 and a normally open contact controlled by a contactor K4, the output end of the alternating current component detection module is composed of the contact X19 and a contact X20, and the contact X20 is grounded;
the AC220V input is a triangular power supply, one end of the AC220V input is grounded, the live wire end of the AC220V input is connected with one end of a fuse FU0, the AC220V input is connected with one end of a main power switch S1 after passing through the fuse FU0, the other end of the main power switch S1 is connected with one end of an alternating current power switch S12, the other end of the alternating current power switch S12 is connected with the input end of a transformer T after passing through a voltage regulator TY, the voltage regulating end of the transformer T is connected with one end of a switch S13, the other end of the switch S13 is connected with a contact X16, and the other end of the transformer T is connected with one end of a protection resistor R1;
the output end of the alternating current direct serial-in module is respectively connected with the output end of the alternating current direct-blocking serial-in module, the output end of the alternating current coupling serial-in module, one end of a normally open contact controlled by the contactor K4, one end of a resistor R19 and one end of a voltmeter V7;
the other end of the resistor R19 is connected with the other end of the switch S11; the other end of the normally open contact controlled by the contactor K4 is connected with a contact X19;
the other end of the voltmeter V7 is connected with the other end of the protection resistor R1, one end of the switch S11 and the contact X20 respectively.
3. The on-line tester for insulation devices of direct current systems according to claim 2, wherein the contact X19 is connected with the load bus in the forward direction.
4. An on-line tester for dc system insulation as claimed in claim 2, wherein said contact X19 is connected negatively to the load bus.
5. The on-line tester for the insulation device of the direct current system according to claim 2, wherein the output voltage of the alternating current component detection module is 0-100V.
6. The on-line tester for the insulation device of the direct current system according to claim 2, wherein the alternating current direct serial module comprises an indicator lamp HX8, a resistor R18 and a normally closed contact controlled by a contactor K4, the input end of the alternating current direct serial module is one end of the indicator lamp HX8, the other end of the indicator lamp HX8 is connected with one end of the resistor R18, one end of the resistor R18 is connected with one end of the normally closed contact controlled by the contactor K4, and the other end of the normally closed contact controlled by the contactor K4 is connected with the output end of the alternating current direct serial module.
7. The on-line tester for the insulation device of the direct current system according to claim 2, wherein the alternating current blocking string-in module comprises a capacitor C11 and a resistor R17, one end of the capacitor C11 is connected with the input end of the alternating current blocking string-in module, the other end of the capacitor C11 is connected with one end of the resistor R17, and the other end of the resistor R17 is connected with the output end of the alternating current blocking string-in module.
8. The on-line tester for insulation devices of a direct current system according to claim 7, wherein the resistor R17 is a protection resistor.
9. The on-line tester for insulation devices of direct current systems according to claim 2, wherein the ac coupling serial module comprises a switch Kc, one end of the switch Kc is connected with the contact X16 to serve as an input end of the ac direct serial module, and the other end of the switch Kc is connected with an output end of the ac direct serial module.
10. The on-line tester for the insulation device of the direct current system according to claim 1, wherein the power module comprises a meter power supply, a built-in lithium battery, a contact K0, a contactor K0, a charger, an AC/DC power module, a fuse FU1 and a contact S2, wherein a direct current power VCC is respectively connected with one end of the contact K0 and the power input end of the meter, the other end of the contact K0 is selectively connected with the AC/DC power module, the built-in lithium battery and the charger, the output end of the AC/DC power module is connected between a main power switch and an alternating current power switch of the alternating current component detection module, the charger is connected with the built-in lithium battery in parallel, and the output end of the charger is connected between an alternating current input and the main power switch of the alternating current component detection module through the contact S2 and the fuse FU 1.
11. The on-line tester for insulation devices of a direct current system according to claim 1, wherein the direct current output module comprises a fuse FU2, a direct current power switch S3, an AC/DC switching power supply, a voltmeter V2 and an ammeter A3;
one end of the fuse FU2 is used as the output end of the direct current output module and is connected between the main power switch and the alternating current power switch of the alternating current component detection module; the other end of the fuse FU2 is connected with one end of an AC/DC switching power supply through a DC power supply switch S3, and the other end of the AC/DC switching power supply is used for measuring DC output data through a voltmeter V2 and an ammeter A3.
12. The on-line tester for DC system insulation as described in claim 11, wherein said DC output data is DC:0 to 280V,2A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110931638.7A CN113777518B (en) | 2021-08-13 | 2021-08-13 | DC system insulation device on-line tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110931638.7A CN113777518B (en) | 2021-08-13 | 2021-08-13 | DC system insulation device on-line tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113777518A CN113777518A (en) | 2021-12-10 |
| CN113777518B true CN113777518B (en) | 2024-03-01 |
Family
ID=78837623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110931638.7A Active CN113777518B (en) | 2021-08-13 | 2021-08-13 | DC system insulation device on-line tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113777518B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007240426A (en) * | 2006-03-10 | 2007-09-20 | Yazaki Corp | Insulation detection method and insulation detection device |
| CN203551651U (en) * | 2013-10-24 | 2014-04-16 | 广东易事特电源股份有限公司 | A DC power system bus voltage AC component detecting circuit |
| CN104678341A (en) * | 2015-03-06 | 2015-06-03 | 国网四川省电力公司电力科学研究院 | Detection device and detection method for station-dedicated DC power system insulation monitoring device |
| WO2015087098A1 (en) * | 2013-12-13 | 2015-06-18 | Prause József | Method for measuring the insulation resistance of an ungrounded dc power network and for localizing the earth fault, and current injecting two-pole device |
| CN110940928A (en) * | 2019-12-13 | 2020-03-31 | 上海华电电力发展有限公司望亭发电分公司 | AC fleeing positioning detection device for power plant DC system |
| CN210690728U (en) * | 2019-07-12 | 2020-06-05 | 国网浙江省电力有限公司嘉兴供电公司 | Direct current grounding test box |
| CN111443302A (en) * | 2020-04-03 | 2020-07-24 | 国网浙江省电力有限公司嘉兴供电公司 | Direct current grounding test device with variable frequency alternating current output and method |
| CN212379482U (en) * | 2020-08-28 | 2021-01-19 | 重庆理工大学 | One-point-to-ground insulation fault H bridge monitoring device for direct current system of transformer substation |
| CN113030780A (en) * | 2021-02-03 | 2021-06-25 | 国网浙江桐庐县供电有限公司 | Fault simulation device for direct current system of transformer substation |
| KR20210095471A (en) * | 2020-01-23 | 2021-08-02 | 강원대학교산학협력단 | Detection apparatus for leakage current fault of LED lighting using earth resistance |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9297862B2 (en) * | 2011-07-28 | 2016-03-29 | Eaton Corporation | Systems and apparatus for fault detection in DC power sources using AC residual current detection |
-
2021
- 2021-08-13 CN CN202110931638.7A patent/CN113777518B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007240426A (en) * | 2006-03-10 | 2007-09-20 | Yazaki Corp | Insulation detection method and insulation detection device |
| CN203551651U (en) * | 2013-10-24 | 2014-04-16 | 广东易事特电源股份有限公司 | A DC power system bus voltage AC component detecting circuit |
| WO2015087098A1 (en) * | 2013-12-13 | 2015-06-18 | Prause József | Method for measuring the insulation resistance of an ungrounded dc power network and for localizing the earth fault, and current injecting two-pole device |
| CN104678341A (en) * | 2015-03-06 | 2015-06-03 | 国网四川省电力公司电力科学研究院 | Detection device and detection method for station-dedicated DC power system insulation monitoring device |
| CN210690728U (en) * | 2019-07-12 | 2020-06-05 | 国网浙江省电力有限公司嘉兴供电公司 | Direct current grounding test box |
| CN110940928A (en) * | 2019-12-13 | 2020-03-31 | 上海华电电力发展有限公司望亭发电分公司 | AC fleeing positioning detection device for power plant DC system |
| KR20210095471A (en) * | 2020-01-23 | 2021-08-02 | 강원대학교산학협력단 | Detection apparatus for leakage current fault of LED lighting using earth resistance |
| CN111443302A (en) * | 2020-04-03 | 2020-07-24 | 国网浙江省电力有限公司嘉兴供电公司 | Direct current grounding test device with variable frequency alternating current output and method |
| CN212379482U (en) * | 2020-08-28 | 2021-01-19 | 重庆理工大学 | One-point-to-ground insulation fault H bridge monitoring device for direct current system of transformer substation |
| CN113030780A (en) * | 2021-02-03 | 2021-06-25 | 国网浙江桐庐县供电有限公司 | Fault simulation device for direct current system of transformer substation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113777518A (en) | 2021-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103419643B (en) | A kind of high voltage power distribution control method and device thereof | |
| CN104133131B (en) | A kind of IGBT driving malfunctions detection and diagnostic method | |
| CN110794293A (en) | Method for detecting automatic nuclear capacity switch state of storage battery | |
| CN102280864B (en) | Post-failure live treatment method for protection device of distribution network system and portable protection device | |
| CN105675966B (en) | A kind of fault arc detection method and its protective device based on difference calculation | |
| CN103792505A (en) | Ground fault simulation device for electric power direct current system | |
| CN105572533B (en) | Method for identifying transient fault and permanent fault | |
| CN210129032U (en) | Device for on-line monitoring fault of current transformer | |
| CN101902033B (en) | Intelligent protection device with zero pressure drop | |
| CN113777518B (en) | DC system insulation device on-line tester | |
| CN210690728U (en) | Direct current grounding test box | |
| CN111948575A (en) | Current transformer secondary side neutral line disconnection detection method and device | |
| CN203543694U (en) | High voltage power distribution control device | |
| CN217486232U (en) | Open circuit on-line monitoring and protecting device of storage battery circuit | |
| CN203513016U (en) | Power supply open-phase protection device of lift control cabinet | |
| CN217689343U (en) | Alternating-current charging stake output short circuit detection circuitry | |
| CN201699392U (en) | Electrical leakage protector for pressing machine | |
| CN114355250A (en) | Detection apparatus based on low-voltage electrical fault | |
| CN108279360A (en) | Singlephase earth fault circuit monitoring system | |
| CN209656843U (en) | A kind of TBS valve thyristor grade off-line detection device | |
| CN109217742B (en) | Control system of permanent magnet synchronous motor | |
| CN207992363U (en) | Singlephase earth fault circuit monitoring system | |
| CN103116108B (en) | Intelligent detector for direct-current power supply system of transformer substation | |
| CN205429699U (en) | Stator ground fault protection auxiliary device | |
| CN206894282U (en) | Charging gun electric energy protection device |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |