CN113933774A - One-button type insulation monitoring device all-dimensional functionality evaluation system and method - Google Patents
One-button type insulation monitoring device all-dimensional functionality evaluation system and method Download PDFInfo
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- CN113933774A CN113933774A CN202111151013.5A CN202111151013A CN113933774A CN 113933774 A CN113933774 A CN 113933774A CN 202111151013 A CN202111151013 A CN 202111151013A CN 113933774 A CN113933774 A CN 113933774A
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- 238000009413 insulation Methods 0.000 title claims abstract description 99
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Abstract
The invention provides a system and a method for comprehensively evaluating functionality of a one-key insulation monitoring device, which can simulate a conventional insulation function test, an instant grounding function test, an anti-branch distributed capacitance function test and a bridge resistance evaluation test, and can carry out data communication with a direct current power supply system compared with a manual investigation direct current power supply system.
Description
Technical Field
The invention relates to the technical field of direct current monitoring, in particular to an all-dimensional functionality evaluation system and method for a one-key insulation monitoring device.
Background
The importance of the insulation monitoring device of the direct-current power supply system as a special device for monitoring and alarming voltage abnormity caused by faults such as grounding of the positive electrode and the negative electrode of the direct-current power supply system, power supply channeling outside the system and the like is self-evident. The national grid company enterprise standard Q/GDW1969-2013 technical specification of insulation monitoring devices of transformer substation direct current systems has been promulgated and implemented, and the national energy agency issued DL/T1392-2014 technical conditions of insulation monitoring devices of direct current power systems in 2014 makes clear requirements on the insulation monitoring devices. However, due to the long-term lack of technical specifications of the insulation monitoring device of the dc power supply system, a certain gap exists between the insulation monitoring device of the dc power supply system in operation and the newly issued standard, and the insulation monitoring device in operation in the station cannot be detected whether the insulation monitoring device reaches the standard or not, whether aging occurs or not, and the like.
The maintenance means at the present stage is to simulate one point grounding in the standby branch of the operating direct current system, and check whether the equipment is in normal alarm line selection. The existing maintenance means has limited technology, an unqualified operating insulation monitoring device cannot be found, and maintenance technical improvement is applied only when the operating life of the equipment reaches the quit operation life or the equipment cannot work normally; the unqualified insulation monitoring device runs on line, and the expected targets of improving the processing speed of the grounding fault, lightening the labor, shortening the grounding period and ensuring the running of the power system to be safer can not be achieved.
Disclosure of Invention
Accordingly, it is an object of the present invention to provide an all-round functionality assessment system for a one-touch insulation monitoring device that addresses at least the above problems.
The technical scheme adopted by the invention is as follows:
the omnibearing functional evaluation system of the one-key type insulation monitoring device comprises a mutual inductor detection module, an early warning module and an adjustable current module which are respectively electrically connected with the insulation monitoring device, wherein the mutual inductor detection module is used for detecting real current and voltage data in a direct current power supply system, the adjustable current module is used for simulating current and voltage data in the direct current power supply system, the insulation monitoring device is used for comparing the real current and voltage data in the direct current power supply system detected by the mutual inductor detection module with the current and voltage data in the simulated direct current power supply system so as to judge fault types, and the early warning module is used for carrying out fault early warning according to the fault types transmitted by the insulation monitoring device.
Further, the transformer detection module comprises a current transformer and a voltage transformer which are respectively and electrically arranged in the direct current power supply system and are respectively used for actually measuring current and voltage.
Further, the simulation fault types comprise a conventional insulation function test, an instant grounding function test, an anti-distribution function test and a bridge resistance evaluation test.
Further, the conventional insulation function test includes a single-pole ground fault, a two-pole ground fault, an ac break-in fault, and voltage compensation.
Furthermore, the insulation monitoring device comprises a starting button, a working power supply, a main control module, 4 paths of direct current voltage sampling, 1 path of alternating current voltage sampling, a comprehensive evaluation reporting unit of the insulation monitoring device, a USB data interface, a touch screen, a grounding resistor, a ground distributed capacitor, an adjustable alternating current power supply and a standby balance bridge.
And further, the device comprises a report generating module which is used for recording analysis reports of a conventional insulation function test, an instant grounding function test, an anti-distribution function test and a bridge resistance evaluation test.
Correspondingly, the invention further provides an all-dimensional functionality evaluation method of the one-button insulation monitoring device, and the method comprises the following steps:
s1: the standby balance bridge of the insulation monitoring device is connected into a direct current power supply system through a test lead;
s2: turning off a working power supply of the insulation monitoring device, and accessing an output terminal + KM, -KM and GND of the insulation monitoring device;
s3, connecting the USB data interface of the insulation monitoring device with the data interface of the DC power supply system by a communication line;
and S4, performing fault detection on the direct-current power supply system through a one-key starting button of the insulation monitoring device, and displaying the detection result of the fault type on the touch screen in real time through the processing of the comprehensive evaluation reporting unit of the insulation monitoring device.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a one-key type insulation monitoring device omnibearing functional evaluation system and a one-key type insulation monitoring device omnibearing functional evaluation method. The invention can verify whether the function of the direct current power supply system is complete, and judge whether the direct current power supply system meets the current use requirement.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive efforts.
Fig. 1 is a schematic overall circuit diagram of an all-directional functionality evaluation system for a one-touch insulation monitoring device according to an embodiment of the present invention.
Fig. 2 is a schematic view of the overall structure of the insulation monitoring device of the omnibearing functionality evaluation system of the one-touch insulation monitoring device provided in the embodiment of the present invention.
Fig. 3 is a logic diagram of a simulated fault type of the omni-directional functionality evaluation system of the one-click insulation monitoring device according to the embodiment of the invention.
Fig. 4 is a schematic overall structure flow diagram of an overall functionality evaluation method for the one-touch insulation monitoring device according to the embodiment of the invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, the illustrated embodiments are provided to illustrate the invention and not to limit the scope of the invention.
Referring to fig. 1 and 2, the present invention provides an omnibearing functionality evaluation system for a one-button insulation monitoring device, the system comprising a transformer detection module, an early warning module and an adjustable current module, the transformer detection module is electrically connected to the insulation monitoring device, the transformer detection module is used for detecting real current and voltage data in a dc power supply system, the adjustable current module is used for simulating current and voltage data in the dc power supply system, the insulation monitoring device is used for comparing the real current and voltage data in the dc power supply system detected by the transformer detection module with the current and voltage data in the simulated dc power supply system, and further determining a fault type, the early warning module is used for performing fault early warning according to the fault type transmitted by the insulation monitoring device, and exemplarily, the current and voltage data simulated by the adjustable current module is compared with the real measured current and voltage, the insulation monitoring device can provide a judgment basis for the fault type of the direct-current power supply system for maintenance personnel, and the stability of the direct-current power supply system can be maintained better according to the judgment basis.
The transformer detection module comprises a current transformer and a voltage transformer which are respectively and electrically arranged in the direct current power supply system and are respectively used for actually measuring current and voltage, illustratively, the actual current and voltage in the direct current power supply system can be measured through the current transformer and the voltage transformer, and the resistance can be calculated through the current and voltage.
The simulation fault types comprise a conventional insulation function test, an instantaneous grounding function test, an anti-distribution function test and a bridge resistance evaluation test, wherein in the conventional insulation function test, illustratively, two adjustable grounding resistors R1 and R2 are used for simulating a grounding fault, a Vac alternating current source is used for simulating an alternating current channeling fault, and a plurality of groups of single-pole grounding, two-pole grounding and voltage compensation tests with different resistance values and a plurality of groups of alternating current channeling tests with different alternating voltage values are respectively carried out; the transient grounding test simulates a plurality of groups of short-time grounding fault tests with different resistance values through short-time closing of k1 or k2, and specifically, the transient grounding function test comprises the following steps: similarly, by controlling k1 and k2 to close milliseconds and automatically adjusting resistance, instantaneous earth faults of the positive electrode and the negative electrode of 5k omega, 15k omega, 25k omega and 30k omega are simulated respectively, and 8 groups of tests are performed. In the process, the device can automatically update the test result, the bus voltage, the positive and negative voltages to earth, the insulation resistance, the voltage/current waveform and the line selection result are recorded, and after the test result is finished, the disconnection of k1 and k2 is controlled.
Anti distributed capacitance function test unit configuration 3 distributed capacitance, according to experimental flow program automatic input different distributed capacitance, examine insulating monitoring device under different distributed capacitance environment, when taking place the same or inequality ground fault, whether can normally select a line and report an emergency and ask for help or increased vigilance, specific, anti distributed capacitance function test: the method is approximately the same as the content of a conventional insulation function test, and the only difference is that in each insulation test, three distributed capacitors of 1 muF, 4 muF and 10 muF are put in, and whether the insulation device alarms correctly or not and selects a line under the condition that the distributed capacitors exist in the insulation device is verified. In the process, the device can automatically update the test result and record the bus voltage, the positive and negative voltages to earth, the insulation resistance, the voltage waveform and the line selection result. After completion, controls k4, k5, and k6 are turned off.
The bridge resistance evaluation test is to calculate whether the resistance values of a balanced bridge resistor and an unbalanced bridge resistor in the insulation monitoring device meet the use standard or not by inputting R3 resistors and by a system algorithm; two resistors are designed for the standby balance bridge, and are used for maintaining the voltage of a positive electrode and a negative electrode of a direct current system to earth at 50% of bus voltage, specifically, a bridge resistance evaluation test: and controlling a k3 switch to be closed, calculating the voltage to ground of the bus before and after the bus is switched into the ground resistor to obtain the size of the resistance of the balanced bridge and the size of the resistance of the unbalanced bridge, and judging whether the bridge resistance of the insulation monitoring device meets the requirements. After completion, control k3 is turned off.
The conventional insulation function test includes a single-pole ground fault, a two-pole ground fault, an ac break-in fault, and voltage compensation, and exemplarily, the single-pole ground fault: by controlling the closing of k1 and k2 and automatically adjusting the resistance, the single-pole one-point ground faults of the positive electrode and the negative electrode of 5k omega, 15k omega, 25k omega and 30k omega are simulated respectively, and 8 groups of tests are performed. In the process, the device can automatically update the test result, the bus voltage, the positive and negative voltages to earth, the insulation resistance, the voltage waveform and the line selection result are recorded, and after the bus voltage, the positive and negative voltages to earth, the insulation resistance, the voltage waveform and the line selection result are recorded, the disconnection of k1 and k2 is controlled; two-pole grounding fault: by controlling the closing of k1 and k2 and automatically adjusting the resistance, the same ground fault of two poles with the same resistance value and the ground fault of two poles with different resistance values of 40k omega/40 k omega, 50k omega/50 k omega, 30k omega/40 k omega and 40k omega/50 k omega are simulated respectively, and 4 groups of tests are carried out. In the process, the device can automatically update the test result, the bus voltage, the positive and negative voltages to earth, the insulation resistance, the voltage waveform and the line selection result are recorded, and after the bus voltage, the positive and negative voltages to earth, the insulation resistance, the voltage waveform and the line selection result are recorded, the disconnection of k1 and k2 is controlled; and (3) alternating current entering fault: by controlling the closing of k7 and k8 and automatically outputting 0-300V alternating-current voltage, 10V, 30V, 50V and 70V positive and negative alternating-current channeling faults are simulated respectively, 8 groups of tests are performed, in the process, the device can automatically update test results, the bus voltage, positive and negative voltages to earth, the insulation resistance, the voltage waveform and the line selection result are recorded, and after the test is completed, the disconnection of k7 and k8 is controlled; voltage compensation: through controlling the closing of k1 and k2 and automatically adjusting the resistance, positive and negative high-resistance ground faults of 100k omega and 200k omega are simulated respectively, and 4 groups of tests are performed. In the process, the difference between the voltages to ground of the positive electrode and the negative electrode is controlled to be within 10% of the voltage of the bus, whether the insulation device alarms correctly or not is verified, the line selection is carried out, the voltage to ground bias value is measured and calculated, finally, the bus voltage, the voltages to ground of the positive electrode and the negative electrode, the insulation resistance, the voltage waveform and the line selection result are recorded, and after the voltage to ground voltage, the voltage to ground of the positive electrode and the negative electrode, the insulation resistance, the voltage waveform and the line selection result are recorded, the k1 and the k2 are controlled to be disconnected.
The insulation monitoring device comprises a starting button, a working power supply, a main control module, 4 paths of direct current voltage sampling, 1 path of alternating current voltage sampling, a comprehensive evaluation report unit of the insulation monitoring device, a USB data interface, a touch screen, a grounding resistor, a ground distributed capacitor, an adjustable alternating current power supply and a standby balance bridge, wherein the working power supply supplies power to each circuit module of the equipment exemplarily; the main control module is mainly used as a central brain for data analysis, algorithm calculation and logic control; 4 paths of direct current voltage acquisition respectively acquire the voltages to earth of the positive electrode and the negative electrode of a bus in the device; the 1-path alternating current voltage acquisition is a function of acquiring a bus-to-ground alternating current power supply of the calibrator, and the touch screen displays all parameters; the USB data interface is used for data export; the comprehensive evaluation report unit of the insulation monitoring device is used for one-click automatic recording of various data, data analysis and verification analysis report generation.
Specifically, the present embodiment further includes a report generating module, where the report generating module is configured to record analysis reports of a conventional insulation function test, an instantaneous grounding function test, an anti-distribution function test, and a bridge resistance evaluation test, and illustratively, a maintenance worker can intuitively interpret whether a fault exists in the dc power supply system through the analysis reports.
Correspondingly, the invention further provides an all-dimensional functionality evaluation method of the one-button insulation monitoring device, and the method comprises the following steps:
s1: the standby balance bridge of the insulation monitoring device is connected into a direct current power supply system through a test lead;
s2: turning off a working power supply of the insulation monitoring device, and accessing an output terminal + KM, -KM and GND of the insulation monitoring device;
s3, connecting the USB data interface of the insulation monitoring device with the data interface of the DC power supply system by a communication line;
and S4, performing fault detection on the direct-current power supply system through a one-key starting button of the insulation monitoring device, and displaying the detection result of the fault type on the touch screen in real time through the processing of the comprehensive evaluation reporting unit of the insulation monitoring device.
Specifically, by pressing a key start button, the insulation monitoring device performs a plurality of groups of single-pole grounding, two-pole grounding, alternating current channeling, a voltage compensation simulation conventional insulation test and an anti-distributed capacitance interference test, then performs a plurality of groups of instantaneous grounding and bridge resistance evaluation, records the conditions of accurate alarm, error alarm, no alarm and the like of the insulation monitoring device besides recording a plurality of groups of test data, and then provides an evaluation conclusion and suggestion of the insulation monitoring device according to test data information, so that an operation maintainer can make an accurate judgment according to a comprehensive evaluation report.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The omnibearing functional evaluation system of the one-key type insulation monitoring device is characterized by comprising a mutual inductor detection module, an early warning module and an adjustable current module which are respectively electrically connected with the insulation monitoring device, wherein the mutual inductor detection module is used for detecting real current and voltage data in a direct current power supply system, the adjustable current module is used for simulating current and voltage data in the direct current power supply system, the insulation monitoring device is used for comparing the real current and voltage data in the direct current power supply system detected by the mutual inductor detection module with the current and voltage data in the simulated direct current power supply system so as to judge fault types, and the early warning module is used for carrying out fault early warning according to the fault types transmitted by the insulation monitoring device.
2. The system for omni-directional functionality assessment according to claim 1, wherein said transformer detection module comprises a current transformer and a voltage transformer electrically disposed in the dc power supply system and adapted to measure current and voltage, respectively.
3. The one-touch insulation monitoring device full functionality assessment system according to claim 1, wherein said simulated fault types comprise a conventional insulation function test, an instantaneous ground function test, a distribution resistance function test and a bridge resistance evaluation test.
4. The one-touch insulation monitoring device full functionality assessment system according to claim 1, wherein said routine insulation function tests include single pole ground fault, double pole ground fault, ac break-in fault and voltage compensation.
5. The omnibearing functionality evaluation system of the one-button insulation monitoring device according to claim 1, wherein the insulation monitoring device comprises a start button, a working power supply, a main control module, 4 direct-current voltage samples, 1 alternating-current voltage sample, an insulation monitoring device comprehensive evaluation reporting unit, a USB data interface, a touch screen, a ground resistor, a ground distributed capacitor, an adjustable alternating-current power supply and a standby balance bridge.
6. The one-touch insulation monitoring device full functionality assessment system according to claim 3, comprising a report generation module for recording analysis reports of a conventional insulation function test, an instantaneous ground function test, an anti-distribution function test and a bridge resistance evaluation test.
7. The omnibearing functional evaluation method of the one-touch insulation monitoring device is applied to an omnibearing functional evaluation system of the one-touch insulation monitoring device, and comprises the following steps of:
s1: the standby balance bridge of the insulation monitoring device is connected into a direct current power supply system through a test lead;
s2: turning off a working power supply of the insulation monitoring device, and accessing an output terminal + KM, -KM and GND of the insulation monitoring device;
s3, connecting the USB data interface of the insulation monitoring device with the data interface of the DC power supply system by a communication line;
and S4, performing fault detection on the direct-current power supply system through a one-key starting button of the insulation monitoring device, and displaying the detection result of the fault type on the touch screen in real time through the processing of the comprehensive evaluation reporting unit of the insulation monitoring device.
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