CN111751607A - Electric arc suppression coil controller testing device - Google Patents
Electric arc suppression coil controller testing device Download PDFInfo
- Publication number
- CN111751607A CN111751607A CN202010513125.XA CN202010513125A CN111751607A CN 111751607 A CN111751607 A CN 111751607A CN 202010513125 A CN202010513125 A CN 202010513125A CN 111751607 A CN111751607 A CN 111751607A
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- power supply
- voltage regulating
- arc suppression
- suppression coil
- cpu module
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- 230000001629 suppression Effects 0.000 title claims abstract description 39
- 238000012360 testing method Methods 0.000 title claims abstract description 25
- 238000010891 electric arc Methods 0.000 title claims description 6
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims abstract description 17
- 238000004804 winding Methods 0.000 claims abstract description 11
- 230000005611 electricity Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 abstract 1
- 230000033228 biological regulation Effects 0.000 description 6
- 230000007547 defect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
Abstract
The invention discloses a power arc suppression coil controller testing device, wherein a power supply air switch is respectively and electrically connected with the input end of a voltage regulating power supply and the input end of a switching power supply, one end of a primary side winding of a miniature current transformer is electrically connected with the output end of the voltage regulating power supply, a moving plate terminal of an adjustable capacitor is electrically connected with the output end of the voltage regulating power supply, the input end of a CPU module is respectively and electrically connected with the output end of the voltage regulating power supply, a secondary side winding of the miniature current transformer and the output end of the switching power supply, and the output end of the CPU module is respectively and electrically connected with the control end of the voltage regulating power supply and the control end of the: the method plays a great role in improving the power supply reliability of the system, and effectively ensures the safe and stable operation of the power grid.
Description
Technical Field
The invention relates to the technical field of a capacitance current detection device, in particular to the technical field of an arc suppression coil capacitance current detection device.
Background
Along with the enlargement of urban and rural power grids and the increase of cable outgoing lines, the capacitance current of a system to the ground is increased sharply, the current flowing through a fault point after single-phase grounding is large, electric arcs are not easy to extinguish, intermittent arc grounding overvoltage is easy to generate, and meanwhile, the accidental tripping rate is obviously increased due to the fact that resonant overvoltage is easy to cause when an iron core of an electromagnetic voltage transformer is saturated. In order to prevent overvoltage generated when a low-current grounding system is grounded, a resonant grounding mode is generally adopted by a power grid, namely, an arc suppression coil is arranged at a neutral point. When single-phase grounding occurs, the inductive current generated by the arc suppression coil compensates the capacitance current of the fault point, so that the residual current of the fault point is reduced, and the purposes of natural arc suppression, accident prevention and even accident elimination are achieved. The operation experience shows that the arc suppression coil has obvious effects on restraining gap arc overvoltage and resonance overvoltage generated by saturation of the electromagnetic voltage transformer, reducing the accident trip rate of a circuit, and reducing personal casualty and equipment damage. The newly issued electric power industry standard DL/T620-: when the single-phase earth fault current is larger than 10A, an arc suppression coil is arranged at a neutral point of a system formed by 3-10 kV overhead lines and all 35 and 66kV power grids; in a system formed by 3-10 kV cable lines, when the single-phase earth fault current is larger than 30A, an arc suppression coil is arranged at a neutral point. The gear of the arc suppression coil is controlled by the arc suppression coil controller according to the current tested capacitance current, and as shown in fig. 2, in the prior art, the arc suppression coil controller tests the capacitance current of the arc suppression coil through a power voltage transformer and a power current transformer. Therefore, the capacitance current under the accurate test running state is an important basis for controlling the gear of the arc suppression coil. At present, after an arc suppression coil controller is put into operation, because no special detection equipment is used for carrying out inspection work, if the capacitance current of a system is tested by the arc suppression coil controller inaccurately, the arc suppression coil is not operated at an ideal gear, and if a system has a ground fault, the arc suppression coil is burnt in serious conditions.
Disclosure of Invention
The invention aims to solve the defects, and provides a power arc suppression coil controller testing device which can make up the defect that an arc suppression coil controller cannot be checked in operation, effectively solves the problem that the operating arc suppression coil controller tests capacitance current in a low-current grounding system mode, and ensures that the arc suppression coil controller accurately controls the gear position of an arc suppression coil.
The technical solution adopted by the present invention to solve the above technical problems is as follows:
electric power arc suppression coil controller testing arrangement, it is including power empty division, voltage regulation power, miniature current transformer, adjustable capacitor, switching power supply, CPU module and display screen, power empty division is connected with the input of voltage regulation power and switching power's input electricity respectively, miniature current transformer inclines the one end of side winding and is connected with the output electricity of voltage regulation power, adjustable capacitor's rotor wiring end is connected with the output electricity of voltage regulation power, the input of CPU module is connected with the output electricity of voltage regulation power's output, miniature current transformer's secondary side winding and switching power's output electricity respectively, the output of CPU module is connected with the control end of voltage regulation power and adjustable capacitor's control end electricity respectively.
The display screen is electrically connected with the CPU module.
The CPU module adopts a DSP digital signal processing chip.
The invention adopts the technical proposal to achieve the following beneficial effects: the electric arc suppression coil controller testing device provided by the invention has the advantages that the output voltage of the voltage-regulating power supply and the capacitance current output by the adjustable capacitor are controlled by the CPU module in an off-line state, the capacitance load in operation is simulated, and the accuracy of the arc suppression coil controller in detecting the capacitance current is checked, so that the gear compensation effect of the arc suppression coil and the existence of harmonic waves in the compensation current can be effectively checked, the defect that the arc suppression coil controller cannot be checked in operation is overcome, the problem that the operating arc suppression coil controller tests the capacitance current in a small-current grounding system mode is effectively solved, the arc suppression coil controller is ensured to accurately control the gear of the arc suppression coil, a great effect is realized on improving the power supply reliability of a system, and the safe and stable operation of a power grid is effectively guaranteed.
Drawings
FIG. 1 is a schematic block diagram of the circuit components of the present invention;
fig. 2 is a block diagram of the circuit of the present invention in use.
Detailed Description
As shown in fig. 1, the electric arc suppression coil controller testing device comprises a power supply air switch, a voltage regulating power supply, a micro current transformer, an adjustable capacitor, a switch power supply, a CPU module and a display screen, wherein the power supply air switch is respectively electrically connected with the input end of the voltage regulating power supply and the input end of the switch power supply, one end of a primary side winding of the micro current transformer is electrically connected with the output end of the voltage regulating power supply, a rotor terminal of the adjustable capacitor is electrically connected with the output end of the voltage regulating power supply, the input end of the CPU module is respectively electrically connected with the output end of the voltage regulating power supply, a secondary side winding of the micro current transformer and the output end of the switch power supply, the output end of the CPU module is respectively electrically connected with the control end of the voltage regulating power supply and the control end of the adjustable capacitor, the display, the DSP digital signal processing chip is used for calculating and analyzing the capacitance current of the tested object according to the output voltage, the current of the tested object and other information acquired by the CPU module.
As shown in fig. 2, when the electric arc suppression coil controller testing device of the present invention is used for testing, the terminals 1 and 2 of the power supply idle switch are electrically connected with the mains supply, the power supply idle switch is used for cutting off the alternating current mains supply, and the power supply idle switch is disconnected after the test is finished, so that no test voltage output is ensured, and the personal safety of the testers is ensured. The other end 3 of the primary side winding of the micro current transformer and a stator terminal 4 of the adjustable capacitor are electrically connected with an arc suppression coil to be tested, a moving plate terminal 5 of the adjustable capacitor is grounded, a secondary side winding of a voltage regulating power supply, the primary side winding of the micro current transformer, the arc suppression coil and the adjustable capacitor form a test series circuit, adjustable power frequency voltage is provided for a test through the voltage regulating power supply, an adjustable capacitor load is provided for the test through the adjustable capacitor, loop current during the test is collected through the micro current transformer, and a working power supply is provided for a CPU module through the switching power supply. The CPU module collects loop voltage and current during testing, and calculates the effective value of capacitance current, and testers can compare the capacitance current value collected by the arc suppression coil controller according to the tested capacitance current value, so that the arc suppression coil controller can be tested. In order to reduce test errors, the voltage-regulating power supply and the adjustable capacitor can be controlled through the CPU module to carry out multi-point test.
Claims (3)
1. Electric arc suppression coil controller testing arrangement, its characterized in that: it is including power sky division, voltage regulating power, miniature current transformer, adjustable capacitor, switching power supply, CPU module and display screen, the power sky division is connected with the input of voltage regulating power and switching power supply's input electricity respectively, miniature current transformer once the side winding's one end is connected with the output electricity of voltage regulating power, adjustable capacitor's rotor wiring end is connected with the output electricity of voltage regulating power, the input of CPU module is connected with the output electricity of voltage regulating power's output, miniature current transformer's secondary side winding and switching power supply's output electricity respectively, the output of CPU module is connected with the control end of voltage regulating power and adjustable capacitor's control end electricity respectively.
2. A power crowbar coil controller testing arrangement as claimed in claim 1, wherein: the display screen is electrically connected with the CPU module.
3. A power crowbar coil controller testing arrangement according to claim 1 or 2, characterized in that: the CPU module adopts a DSP digital signal processing chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010513125.XA CN111751607A (en) | 2020-06-08 | 2020-06-08 | Electric arc suppression coil controller testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010513125.XA CN111751607A (en) | 2020-06-08 | 2020-06-08 | Electric arc suppression coil controller testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111751607A true CN111751607A (en) | 2020-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010513125.XA Pending CN111751607A (en) | 2020-06-08 | 2020-06-08 | Electric arc suppression coil controller testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111751607A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030636A (en) * | 2021-02-26 | 2021-06-25 | 国网河南省电力公司电力科学研究院 | Active intervention type arc suppression device test system |
-
2020
- 2020-06-08 CN CN202010513125.XA patent/CN111751607A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030636A (en) * | 2021-02-26 | 2021-06-25 | 国网河南省电力公司电力科学研究院 | Active intervention type arc suppression device test system |
| CN113030636B (en) * | 2021-02-26 | 2022-04-08 | 国网河南省电力公司电力科学研究院 | Active intervention type arc suppression device test system |
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