CN113687195B - Electrical equipment discharge fault simulation device and method - Google Patents
Electrical equipment discharge fault simulation device and method Download PDFInfo
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- CN113687195B CN113687195B CN202110931995.3A CN202110931995A CN113687195B CN 113687195 B CN113687195 B CN 113687195B CN 202110931995 A CN202110931995 A CN 202110931995A CN 113687195 B CN113687195 B CN 113687195B
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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Abstract
The application discloses a device and a method for simulating discharge faults of electrical equipment, wherein the device comprises a sine wave high-frequency oscillation booster circuit, a control panel, a wireless transmission module, a wireless remote controller, an electrode connecting rod and a discharge electrode; the sine wave high-frequency oscillation boosting circuit generates pulse high voltage; controlling the working state of the panel display device; the working state of the device is switched by matching with the wireless remote controller; controlling a sine wave high-frequency oscillation boosting circuit to generate pulse high voltage; the wireless transmission module receives a wireless control signal; the wireless remote controller generates a wireless control signal to remotely control the discharge of the device; the electrode connecting rod generates discharge at different positions; the discharge electrodes simulate different discharge types. The application can simulate typical discharge faults of various electrical equipment, is convenient for researchers to develop on-line monitoring technical research of the discharge faults of the electrical equipment, and has the characteristics of small volume, simple structure, low cost, convenient use and the like.
Description
Technical Field
The invention belongs to the technical field of fault diagnosis of electrical equipment, and relates to a device and a method for simulating discharge faults of electrical equipment.
Background
Degradation of insulation of electrical equipment is a major cause of equipment failure. The failure of electrical equipment, particularly large equipment, can cause significant economic losses, and the monitoring of the insulation status of electrical equipment has been very important to the power operation sector.
When insulation degradation occurs in an electrical device in an operating state, discharge faults such as partial discharge and arc breakdown often occur. When the discharge faults occur, electromagnetic waves, ultrasonic waves and optical signals are excited at the discharge position, and chemical reactions are caused to occur in surrounding insulating media, so that the accurate grasp of the characteristics of the information is of great significance for timely finding and diagnosing the insulation degradation of the electrical equipment.
In the existing research and engineering experiments, the characteristic information of the discharge faults is often analyzed by developing a high-voltage test, the fault state can be accurately simulated by the mode, but the cost for building a set of high-voltage test system is high, the equipment is large in size and inconvenient to move and use, and meanwhile, the condition that the life safety of test personnel is endangered easily occurs.
Disclosure of Invention
In order to solve the defects in the prior art, the application provides a device and a method for simulating the discharge faults of electrical equipment, which can be connected with 220V mains supply for use, and are used for generating the discharge faults in typical insulating media of various electrical equipment so as to conveniently research the propagation rule of characteristic signals of the discharge faults, the chemical change of the insulating media under the excitation of the discharge faults and the like.
In order to achieve the above object, the present invention adopts the following technical scheme:
The electric equipment discharge fault simulation device comprises a sine wave high-frequency oscillation boosting circuit, a control panel, a wireless transmission module, a wireless remote controller, an electrode connecting rod and a discharge electrode;
The sine wave high-frequency oscillation boosting circuit is used for generating 20-30kV pulse high voltage;
The control panel is used for providing a human-computer interaction interface; displaying the working state of the device; the wireless remote controller is matched with the wireless remote controller to switch the wired and wireless working states of the device; controlling a sine wave high-frequency oscillation boosting circuit to generate pulse high voltage;
the wireless remote controller is used for generating a wireless control signal and performing remote control of device discharge;
The wireless transmission module is integrated inside the device and is used for receiving wireless control signals of the wireless remote controller;
The electrode connecting rod is used for generating discharge at different positions;
The discharge electrode is used for simulating different discharge types.
The invention further comprises the following preferable schemes:
Preferably, the sine wave high-frequency oscillation boosting circuit comprises a power supply, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a diode D1, a diode D2, a diode D3, a diode D4, a zener diode ZD1, a zener diode ZD2, a MOS (metal oxide semiconductor) transistor MOS1, a MOS transistor MOS2, an inductor L1, an inductor L2, an inductor L3, a capacitor C1, a capacitor C2 and a control switch S;
the inductor L2 and the inductor L3 are wound on the same magnetic core GTC;
the positive electrode of the power supply is connected with one end of an inductor L1, the positive electrode of the power supply is connected with one ends of a resistor R1 and a resistor R2 through a control switch S, and the other end of the inductor L1 is connected with a common end of the inductor L2 and the inductor L3;
The other end of the resistor R1 is connected with the anode of the diode D2, one end of the resistor R3, the anode of the zener diode ZD1 and the grid electrode of the MOS tube MOS 1;
the other end of the resistor R2 is connected with the anode of the diode D1, one end of the resistor R4, the anode of the zener diode ZD2 and the grid of the MOS tube MOS 2;
The source electrodes of the MOS tube MOS1 and the MOS tube MOS2 are connected with the negative electrodes of the zener diode ZD1 and the zener diode ZD2, the other ends of the resistor R3 and the resistor R4;
the cathode of the diode D1 is connected with the drains of the MOS transistor MOS1 and the MOS transistor MOS 2;
the cathode of the diode D2 is connected with the drain electrode of the MOS tube MOS2, one end of the capacitor C1 and one end of the capacitor C2 and the other end of the inductor L3;
The other ends of the capacitor C1 and the capacitor C2 are connected with the drain electrode of the MOS tube MOS1, the other ends of the capacitor C1 and the capacitor C2 and the other end of the inductor L2.
Preferably, the resistor R1 and the resistor R2 adopt direct-insert resistors with 470R and 2W power;
The resistor R3 and the resistor R4 adopt 10k omega resistors;
the model of the diode D1 and the model of the diode D2 are UF4007;
the model of the diode D3 and the model of the diode D4 are IN4742;
the MOS tube MOS1 and MOS tube MOS2 are IRFP250N;
the inductance of the inductor L1 is 80-100uH;
the capacitances of the capacitor C1 and the capacitor C2 are 0.33uF.
Preferably, the control panel comprises a power indicator lamp, a switch knob and a discharge control button;
The power supply prompting lamp displays different colors when the device is connected with 220V commercial power, the device works and the device fails, and prompts the working state of the device;
the switch knob is used for controlling the device to be started and the device to be switched between wired and wireless working states;
The discharge control button is used for controlling the sine wave high-frequency oscillation boosting circuit to generate pulse high voltage.
Preferably, the discharge signal is generated at different positions by providing a plurality of electrode links of different lengths or electrode links of adjustable length.
Preferably, the bottom of the discharging connecting rod is connected with the device base through threads;
the top of the electrode connecting rod is connected with the discharge electrode through threads, and the discharge electrode can be replaced through threads so as to simulate different discharge types.
Preferably, the discharge electrodes are divided into needle electrodes and circular plate electrodes, and needle-needle discharge, needle-plate discharge and plate-plate discharge can be simulated by combining the needle electrodes and the circular plate electrodes.
Preferably, the electrode links and the discharge electrode links are made of copper.
The invention also discloses a method for simulating the discharge faults of the electrical equipment, which comprises the following steps:
step 1: setting an electrode connecting rod and a discharge electrode according to the discharge position and the discharge type;
Step 2: the device is connected with 220V mains supply;
step 3: rotating a switch knob on the control panel to turn on the device;
step 4: the sine wave high-frequency oscillation boosting circuit is controlled to generate pulse high voltage through a discharge control button on the control panel;
Step 5: the electrode links and the discharge electrodes simulate discharge.
Preferably, in the fault simulation process, a power indicator lamp on the rotary control panel is observed, and when a fault color is displayed, the insulation gap is not broken down, and a large amount of residual charges exist on the discharge electrode and the electrode connecting rod; or the inside of the device fails and cannot generate pulse high voltage, so that the device is required to be overhauled;
after the device is used, a discharge electrode of the device is subjected to discharge treatment by using a grounding rod.
The application has the beneficial effects that:
the invention can simulate typical discharge faults of various electrical equipment, is convenient for researchers to develop on-line monitoring technical researches on the discharge faults of the electrical equipment, and has the characteristics of small volume, simple structure, low cost, convenient use and the like;
In the sine wave high-frequency oscillation boosting circuit part, the current limiting loop formed by the control switch S, the inductor L1 and the like is added, so that the impact on the MOS tube under the condition of frequent start and stop of the circuit is reduced, and the damage of the MOS tube is avoided.
Drawings
FIG. 1 is a block diagram of an electrical equipment discharge fault simulator of the present invention;
FIG. 2 is a block diagram of a sine wave high frequency oscillating boost circuit in an embodiment of the invention;
FIG. 3 is a schematic diagram of a discharge electrode in an embodiment of the invention;
The reference numerals in fig. 1 are: 1-1: first electrode connecting rod, 1-2: second electrode connecting rod, 2-1: first discharge electrode, 2-2: second discharge electrode, 3: sine wave high frequency oscillation booster circuit, 4: wireless transmission module, 5: discharge control button, 6: power supply indicator lamp, 7: switch knob, 8: and a wireless remote controller.
Detailed Description
The application is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and are not intended to limit the scope of the present application.
As shown in fig. 1, an electrical equipment discharge fault simulation apparatus of the present invention includes: the sine wave high-frequency oscillation boosting circuit 3, a control panel, a wireless transmission module 4, a wireless remote controller 8, an electrode connecting rod and a discharge electrode;
the sine wave high-frequency oscillation boosting circuit 3 is used for generating 20-30kV pulse high voltage;
As shown in fig. 2, the sine wave high-frequency oscillation boost circuit includes a power supply, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a diode D1, a diode D2, a zener diode ZD1, a zener diode ZD2, a diode D3, a diode D4, a MOS transistor MOS1, a MOS transistor MOS2, an inductor L1, an inductor L2, an inductor L3, a capacitor C1, a capacitor C2, and a control switch S;
the inductor L2 and the inductor L3 are wound on the same magnetic core GTC;
the positive electrode of the power supply is connected with one end of an inductor L1, the positive electrode of the power supply is connected with one ends of a resistor R1 and a resistor R2 through a control switch S, and the other end of the inductor L1 is connected with a common end of the inductor L2 and the inductor L3;
The other end of the resistor R1 is connected with the anode of the diode D2, one end of the resistor R3, the anode of the zener diode ZD1 and the grid electrode of the MOS tube MOS 1;
the other end of the resistor R2 is connected with the anode of the diode D1, one end of the resistor R4, the anode of the zener diode ZD2 and the grid of the MOS tube MOS 2;
The source electrodes of the MOS tube MOS1 and the MOS tube MOS2 are connected with the negative electrodes of the zener diode ZD1 and the zener diode ZD2, the other ends of the resistor R3 and the resistor R4;
the cathode of the diode D1 is connected with the drains of the MOS transistor MOS1 and the MOS transistor MOS 2;
the cathode of the diode D2 is connected with the drain electrode of the MOS tube MOS2, one end of the capacitor C1 and one end of the capacitor C2 and the other end of the inductor L3;
The other ends of the capacitor C1 and the capacitor C2 are connected with the drain electrode of the MOS tube MOS1, the other ends of the capacitor C1 and the capacitor C2 and the other end of the inductor L2.
According to fig. 2, the sine wave high frequency oscillation boosting circuit includes two current protection circuits, two voltage protection circuits, a high frequency oscillator and a high voltage output transformer, specifically:
And (3) current protection: the resistor R1, the resistor R2 and the inductor L1 are connected in series on the positive electrode and the negative electrode of the power supply;
The resistor R1 and the resistor R2 are used for limiting the current passing through the grid electrode of the MOS tube in the oscillating circuit and avoiding tube breakdown;
The inductor L1 is used for ensuring that DS of the MOS tube is not damaged due to huge surge caused by the fact that the DS extremely flows through the MOS tube at the moment of magnetic saturation by utilizing the non-variability of the inductor current.
Voltage protection: the voltage applied to the MOS tube is clamped within a safe range by the voltage stabilizing diode ZD1 and the resistor R3, and the voltage stabilizing diode ZD2 and the resistor R4, so that breakdown is avoided.
High frequency oscillator: MOS tube MOS1, MOS tube MOS2, diode D1, diode D2, capacitor C1, capacitor C2;
when the control switch S is turned on, current flows through R1 and R2, and after the voltage of ZD1 and ZD2 is stabilized, the current is respectively sent into the MOS tube MOS1 and the GS pole of the MOS tube MOS2, so that the two MOS tubes are simultaneously turned on;
Because of the discreteness of component parameters, the DS currents of the two MOS transistors are different at the moment of power-on, and the current flowing through the MOS2 is assumed to be slightly larger, namely I L3>IL2.
Since L2 and L3 are wound on the same magnetic core and have magnetic coupling, the exciting current of the magnetic core is the sum of I L2,IL3, and the exciting current of the iron core is I P1＝IL3-IL2 because of I L3>IL2 and the opposite current directions of I L2 and I L3;
I L2 has the same magnetic circuit as the exciting current I P1 of I L3, and I P1 will generate a mutual inductance current on L2;
L2, L3, C 1,C2 form a parallel resonance, the direction of this mutual inductance current is opposite to I L2, so that the positive feedback results in I L2 becoming smaller and smaller, and finally can be simply seen as if only L3 participates in excitation.
Meanwhile, the voltage of the point B rises, the diode D1 is cut off, the point C keeps high-point voltage, the MOS2 is kept on, because VDS is very small when the MOS2 is turned on, the point A is approximately grounded, the potential of the point D is forcedly pulled down to about 0.7V, the MOS1 is cut off after losing VGS, along with the time, the excitation of the magnetic core by the L3 finally reaches saturation, at the moment, the current just drops to 0 due to the fact that the magnetic core is saturated, the DS of the MOS1 is 0, the L3 loses inductance and approximates to a resistor of a few milliohms, instantaneous large current is completely added to the on-resistance Ron of the MOS2, the potential of the point A is instantaneously raised, the point D2 is cut off, the point D potential is restored to high voltage, the MOS1 is conducted after obtaining VGS, the point B is approximately grounded, and the voltage of the point C is reduced to 0.7V. MOS2 is cut off, MOS1 is kept on, and when L2 excitation reaches saturation, the circuit state is inverted again, and the process is repeated.
In the whole process, the overturning time is determined by the capacity of the resonant capacitors C1 and C2 and L2+L3, because the C1 and C2 form resonance, the primary voltage waveform is sine wave, and the harmonic component is greatly reduced.
Output high voltage transformer: the GTC boosts the sine wave high-frequency voltage and outputs the boosted voltage.
In the implementation, the resistor R1 and the resistor R2 adopt direct-insert resistors with 470R and 2W power;
The resistor R3 and the resistor R4 adopt 10k omega resistors;
the model of the diode D1 and the model of the diode D2 are UF4007;
the model of the diode D3 and the model of the diode D4 are IN4742;
the MOS tube MOS1 and MOS tube MOS2 are IRFP250N;
the inductance of the inductor L1 is 80-100uH;
the capacitance of the capacitor C1 and the capacitance of the capacitor C2 are 0.33uF, and form a high voltage pulse of about 1 WV.
The control panel is used for providing a human-computer interaction interface; displaying the working state of the device; the wireless remote controller 8 is matched with the wired and wireless working states of the switching device; a sine wave high-frequency oscillation boosting circuit 3 is controlled to generate pulse high voltage;
in specific implementation, the control panel comprises a power indicator lamp 6, a switch knob 7 and a discharge control button 5;
the power supply prompting lamp 6 displays different colors when the device is connected with 220V mains supply, the device works and the device fails, and prompts the working state of the device;
the switch knob 7 is used for controlling the opening of the device and the switching of the wired and wireless working states of the device;
the discharge control button 5 is used for controlling the sine wave high-frequency oscillation boosting circuit 3 to generate pulse high voltage.
When the device is particularly used, 220V commercial power is connected to the device, and at the moment, the power supply prompting lamp 6 on the control panel displays yellow;
the switch knob 7 on the control panel is rotated, and at the moment, the power supply prompting lamp 6 displays green;
Clicking the discharge control button 5 on the control panel to generate pulse high voltage, if the insulation gap is not broken down, the power indicator lamp 6 displays red color (at this time, a large amount of residual charges exist on the electrode and the electrode connecting rod, or faults occur in the device, and the pulse high voltage cannot be generated).
The wireless transmission module 4 is integrated inside the device and is used for receiving wireless control signals;
The wireless remote controller 8 is used for generating a wireless control signal and controlling the generation of discharge in a safe position when the simulation device is arranged in a dangerous position (such as the top of a power transformer);
The wireless communication function is used for carrying out discharge simulation in dangerous areas such as the top of the transformer, when a wireless mode is needed, the switch knob 7 on the control panel is switched to the wireless function, and the wireless remote controller 8 is used for carrying out discharge control.
The electrode connecting rod is used for generating discharge at different positions;
The discharge electrode is used for simulating different discharge types.
In practice, the discharge signals are generated at different positions by providing a plurality of electrode connecting rods with different lengths or electrode connecting rods with adjustable lengths.
In FIG. 1, a first electrode connecting rod 1-1, a second electrode connecting rod 1-2, a first discharge electrode 2-1 and a second discharge electrode 2-2 are adopted to simulate different types of discharge at different positions.
The bottom of the discharging connecting rod is connected with the device base through threads;
the top of the electrode connecting rod is connected with the discharge electrode through threads, and the discharge electrode can be replaced through threads so as to simulate different discharge types.
The electrode connecting rod and the discharge electrode connecting rod are made of copper.
The first electrode connecting rod 1-1 and the second electrode connecting rod 1-2 are connected with the positive and negative ends of the discharge circuit through M6 threads, and for partial discharge simulation requirements of different depths and different positions, simulation can be performed by replacing electrode connecting rods with different lengths. As shown in fig. 3, the discharge electrodes are divided into needle electrodes and circular plate electrodes, which can be replaced by M5 threads, and by combining two pairs, needle-needle discharge, needle-plate discharge, and plate-plate discharge can be simulated.
The invention discloses a method for simulating discharge faults of electrical equipment, which comprises the following steps:
step 1: setting an electrode connecting rod and a discharge electrode according to the discharge position and the discharge type;
Step 2: the device is connected with 220V mains supply;
step 3: a switch knob 7 on the control panel is rotated to open the device;
step 4: the sine wave high-frequency oscillation boosting circuit 3 is controlled to generate pulse high voltage through a discharge control button 5 on the control panel;
Step 5: the electrode links and the discharge electrodes simulate discharge.
In the specific implementation, in the fault simulation process, the power supply indicator lamp 6 on the rotary control panel is observed, when the fault color is displayed, the insulation gap is not broken down, and a large amount of residual charges exist on the discharge electrode and the electrode connecting rod; or the inside of the device fails and cannot generate pulse high voltage, so that the device is required to be overhauled;
after the device is used, a discharge electrode of the device is subjected to discharge treatment by using a grounding rod.
While the applicant has described and illustrated the embodiments of the present invention in detail with reference to the drawings, it should be understood by those skilled in the art that the above embodiments are only preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not to limit the scope of the present invention, but any improvements or modifications based on the spirit of the present invention should fall within the scope of the present invention.
Claims (9)
1. The utility model provides an electrical equipment class fault simulation device that discharges, includes sine wave high frequency oscillation boost circuit (3), control panel, wireless transmission module (4), wireless remote controller (8), electrode connecting rod, discharge electrode, its characterized in that:
The sine wave high-frequency oscillation boosting circuit (3) is used for generating 20-30kV pulse voltage, and the sine wave high-frequency oscillation boosting circuit (3) comprises a power supply, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a diode D1, a diode D2, a diode D3, a diode D4, a voltage stabilizing diode ZD1, a voltage stabilizing diode ZD2, a MOS (metal oxide semiconductor) tube MOS1, a MOS tube MOS2, an inductor L1, an inductor L2, an inductor L3, a capacitor C1, a capacitor C2 and a control switch S; the inductor L2 and the inductor L3 are wound on the same magnetic core GTC; the positive electrode of the power supply is connected with one end of an inductor L1, the positive electrode of the power supply is connected with one ends of a resistor R1 and a resistor R2 through a control switch S, and the other end of the inductor L1 is connected with a common end of the inductor L2 and the inductor L3; the other end of the resistor R1 is connected with the anode of the diode D2, one end of the resistor R3, the anode of the zener diode ZD1 and the grid electrode of the MOS tube MOS 1; the other end of the resistor R2 is connected with the anode of the diode D1, one end of the resistor R4, the anode of the zener diode ZD2 and the grid of the MOS tube MOS 2; the source electrodes of the MOS tube MOS1 and the MOS tube MOS2 are connected with the negative electrodes of the zener diode ZD1 and the zener diode ZD2, the other ends of the resistor R3 and the resistor R4; the cathode of the diode D1 is connected with the drains of the MOS transistor MOS1 and the MOS transistor MOS 2; the cathode of the diode D2 is connected with the drain electrode of the MOS tube MOS2, one end of the capacitor C1 and one end of the capacitor C2 and the other end of the inductor L3; the other ends of the capacitor C1 and the capacitor C2 are connected with the drain electrode of the MOS tube MOS1, the other ends of the capacitor C1 and the capacitor C2 and the other end of the inductor L2;
The control panel is used for providing a human-computer interaction interface; controlling the working state of the display device; the wired and wireless working states of the device are switched by matching with a wireless remote controller (8); a sine wave high-frequency oscillation boosting circuit (3) is controlled to generate pulse high voltage; the wireless remote controller (8) is used for generating a wireless control signal and performing remote control of device discharge; the wireless transmission module (4) is integrated inside the device and is used for receiving wireless control signals of the wireless remote controller (8); the electrode connecting rod is used for generating discharge at different positions; the discharge electrode is used for simulating different discharge types.
2. The electrical equipment discharge fault simulation device according to claim 1, wherein:
The resistor R1 and the resistor R2 adopt direct-insert resistors with 470R and 2W power;
The resistor R3 and the resistor R4 adopt 10k omega resistors;
the model of the diode D1 and the model of the diode D2 are UF4007;
the model of the diode D3 and the model of the diode D4 are IN4742;
the MOS tube MOS1 and MOS tube MOS2 are IRFP250N;
the inductance of the inductor L1 is 80-100uH;
the capacitances of the capacitor C1 and the capacitor C2 are 0.33uF.
3. The electrical equipment discharge fault simulation device according to claim 1, wherein:
The control panel comprises a power supply prompting lamp (6), a switch knob (7) and a discharge control button (5);
The power supply prompting lamp (6) displays different colors when the device is connected with 220V mains supply, the device works and the device fails, and prompts the working state of the device;
The switch knob (7) is used for controlling the device to be started and the device to be switched between wired and wireless working states;
The discharge control button (5) is used for controlling the sine wave high-frequency oscillation boosting circuit (3) to generate pulse high voltage.
4. The electrical equipment discharge fault simulation device according to claim 1, wherein:
by providing a plurality of electrode links of different lengths or electrode links of adjustable length, discharge signals are generated at different positions.
5. The electrical equipment discharge fault simulation device according to claim 1, wherein:
The bottom of the electrode connecting rod is connected with the device base through threads;
the top of the electrode connecting rod is connected with the discharge electrode through threads, and the discharge electrode can be replaced through threads so as to simulate different discharge types.
6. The electrical equipment discharge fault simulation device according to claim 1, wherein:
the discharge electrodes are divided into needle electrodes and circular plate electrodes, and can simulate needle-needle discharge, needle-plate discharge and plate-plate discharge through combination of the needle electrodes and the circular plate electrodes.
7. The electrical equipment discharge fault simulation device according to claim 1, wherein:
The electrode connecting rod and the discharge electrode connecting rod are made of copper.
8. An electrical equipment discharge fault simulation method of an electrical equipment discharge fault simulation apparatus according to any one of claims 1-7, wherein:
The method comprises the following steps:
step 1: setting an electrode connecting rod and a discharge electrode according to the discharge position and the discharge type;
Step 2: the device is connected with 220V mains supply;
step 3: a switch knob (7) on the control panel is rotated to open the device;
Step 4: the sine wave high-frequency oscillation boosting circuit (3) is controlled to generate pulse high voltage through a discharge control button (5) on the control panel;
Step 5: the electrode links and the discharge electrodes simulate discharge.
9. The electrical equipment discharge fault simulation method according to claim 8, wherein:
in the fault simulation process, a power supply indicator lamp (6) on the rotary control panel is observed, when fault colors are displayed, the insulation gap is not broken down, and a large amount of residual charges exist on the discharge electrode and the electrode connecting rod; or the inside of the device fails and cannot generate pulse high voltage, so that the device is required to be overhauled;
after the device is used, a discharge electrode of the device is subjected to discharge treatment by using a grounding rod.
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