CN110542842A - 10kV switch cabinet partial discharge simulation device and method - Google Patents
10kV switch cabinet partial discharge simulation device and method Download PDFInfo
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Abstract
the invention discloses a 10kV switch cabinet partial discharge simulation device, which comprises: the system comprises a partial discharge physical model, a front-end execution layer, an execution layer power supply, a terminal platform layer and a platform layer power supply; the partial discharge physical model is electrically connected with one end of the front-end execution layer, and the other end of the front-end execution layer is electrically connected with the execution layer power supply; the front end execution layer comprises a partial discharge input part, a voltage regulation part and a protection part which are electrically connected in sequence, wherein an electric voltage regulator used for matching preset partial discharge quantity is arranged in the voltage regulation part, one end of the electric voltage regulator is electrically connected with the partial discharge input part, and the other end of the electric voltage regulator is electrically connected with the protection part; the front end execution layer is in communication connection with one end of the terminal platform layer, and the other end of the terminal platform layer is electrically connected with the platform layer power supply. The invention also discloses a 10kV switch cabinet partial discharge simulation method, which overcomes the defect of poor partial discharge stability of the existing partial discharge simulation device, ensures that the device flexibly applies voltage, and improves the stability of partial discharge simulation.
Description
Technical Field
The invention relates to the technical field of partial discharge simulation, in particular to a device and a method for simulating partial discharge of a 10kV switch cabinet.
Background
The partial discharge is a discharge that occurs between the electrodes but does not penetrate the electrodes, and is a phenomenon in which repeated breakdown and extinction occur under the effect of high electric field strength due to a weak point inside the insulation of the device or a defect caused during the production process. Partial discharge is an important cause of insulation faults of the power transformation equipment, and the partial discharge is usually generated when equipment insulation is abnormal, so that the partial discharge detection is an important means for detecting the power transformation equipment and an important means for ensuring safe, reliable and stable operation of the power equipment.
however, in actual power production, the partial discharge phenomenon has randomness and uncontrollable property, and the defect cases of on-site partial discharge are few, so that when training of partial discharge of 10kV power equipment or other key researches are carried out, a partial discharge simulation device is usually adopted to simulate partial discharge, but the voltage of the existing partial discharge simulation device needs to be manually lifted, the range of manually regulated voltage is not easy to grasp, and the defect of poor reliability is caused, so that the result of unstable simulated partial discharge is caused; on the other hand, the partial discharge model of the partial discharge simulation device is unstable in discharge amount, and the partial discharge phenomenon disappears after voltage is applied for a period of time, so that the traditional manual voltage regulation mode is mechanically clumsy, the flexible voltage application of the device cannot be ensured, the continuation of the partial discharge phenomenon cannot be ensured, and the manual voltage regulation is easy to generate overvoltage, so that the result that the partial discharge simulation device is broken down is caused.
in summary, a safe, reliable and flexible voltage-adjustable partial discharge simulation apparatus and method are needed to be disclosed.
Disclosure of Invention
The device aims to overcome the defects that the existing partial discharge simulation device has poor stability due to the fact that voltage needs to be adjusted manually, and the traditional manual voltage adjustment mode is mechanically clumsy, so that the device cannot be guaranteed to apply voltage flexibly to maintain the partial discharge phenomenon; in addition, the invention provides a novel 10kV switch cabinet partial discharge simulation device and a method, which improve the stability and reliability of the partial discharge simulation process.
the present invention aims to solve the above technical problem at least to some extent.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
A10 kV cubical switchboard partial discharge analogue means includes: the system comprises a partial discharge physical model for generating a partial discharge signal, a front-end execution layer for receiving and processing the partial discharge signal, an execution layer power supply for supplying power to the front-end execution layer, a terminal platform layer and a platform layer power supply for supplying power to the terminal platform layer; the partial discharge physical model is electrically connected with one end of the front-end execution layer, and the other end of the front-end execution layer is electrically connected with the execution layer power supply; the front-end execution layer comprises a partial discharge input part, a voltage regulation part and a protection part which are electrically connected in sequence, wherein an electric voltage regulator used for matching preset partial discharge quantity is arranged in the voltage regulation part, one end of the electric voltage regulator is electrically connected with the partial discharge input part, and the other end of the electric voltage regulator is electrically connected with the protection part; the front end execution layer is in communication connection with one end of the terminal platform layer, and the other end of the terminal platform layer is electrically connected with the platform layer power supply.
Preferably, the executive layer power supply is a 220V ac power supply for initially generating a voltage signal applied to the front-end executive layer.
preferably, the partial discharge input section includes a partial discharge physical model slot matched with the partial discharge physical model, a high-frequency current sensor for eliminating interference of a low-frequency signal, a filter for narrow-band filtering the partial discharge signal transmitted from the high-frequency current sensor, an amplifier for amplifying the partial discharge signal, and a peak holder for holding a peak value of the partial discharge signal; the partial discharge physical model comprises a corona discharge model, a metal gap discharge model, a bubble discharge model and a surface creepage discharge model, wherein one end of the corona discharge model, one end of the metal gap discharge model, one end of the bubble discharge model and one end of the surface creepage discharge model are electrically connected with a pin b of a partial discharge physical model slot, the pin a of the partial discharge physical model slot is electrically connected with an executive layer power supply sequentially through a voltage regulation part and a protection part, the corona discharge model, the metal gap discharge model, the bubble discharge model and the surface creepage discharge model are electrically connected with the partial discharge physical model slot, replacement can be disassembled, the pin c of the partial discharge physical model slot is electrically connected with one end of a high-frequency current sensor, and the high-frequency current sensor is electrically connected with a filter, an amplifier and a peak value keeper in sequence.
Preferably, the voltage regulating part comprises an electric voltage regulator, a 10kV step-up transformer, a voltage sampler for collecting voltage signals, a first single chip microcomputer, a forward and reverse rotating motor and a motor controller for controlling the direction of the forward and reverse rotating motor; one end of the peak value retainer is electrically connected with a pin d of the first single chip microcomputer, peak value information of the partial discharge signal is transmitted to the first single chip microcomputer, and the first single chip microcomputer analyzes and processes the partial discharge signal received from the peak value retainer so as to obtain buck-boost instruction information adopted in the next step; the e pin of the first single chip microcomputer is electrically connected with a motor controller, the voltage boosting and reducing instruction information is transmitted to the motor controller, the other end of the motor controller is electrically connected with a forward and reverse rotating motor, the other end of the forward and reverse rotating motor is electrically connected with an electric voltage regulator, the electric voltage regulator is sequentially and electrically connected with a 10kV boosting transformer and a voltage sampler, and the 10kV boosting transformer boosts a voltage signal transmitted by the electric voltage regulator to a high voltage state which enables a partial discharge physical model to generate partial discharge; one end of the voltage sampler is electrically connected with the f pin of the first single chip microcomputer and transmits the acquired voltage signal to the first single chip microcomputer.
because the execution layer power supply is an alternating current 220V power supply, and the partial discharge phenomenon occurs when the voltage is gradually increased to a certain degree, the voltage can be increased to a higher voltage level by the 10kV step-up transformer, and the voltage value can be flexibly adjusted within a range by the electric voltage regulator, so that the requirements of partial discharge simulation scenes can be met, and the stability of partial discharge simulation is improved. The first single chip microcomputer analyzes and processes the partial discharge signal received from the peak value holder.
Preferably, the voltage regulation part further comprises a first wireless communication module, the first wireless communication module is electrically connected with the first single chip microcomputer in a bidirectional mode, and the first wireless communication module receives information of the terminal platform layer, transmits the information to the first single chip microcomputer, receives information of the first single chip microcomputer and transmits the information to the terminal platform layer.
Preferably, the protection part is air switch group, the execution layer power is connected to the one end electricity of air switch group, and electronic voltage regulator is connected to the other end electricity, air switch group has earth leakage protection function, has guaranteed personal safety.
Preferably, the terminal platform layer comprises a second single chip microcomputer, a second wireless communication module in bidirectional communication connection with the first wireless communication module, a display for displaying the partial discharge signal and an input module; the second singlechip is electrically connected with the display and transmits the analyzed and processed partial discharge signal to the display; the input module is electrically connected with the second singlechip and transmits information input by workers to the second singlechip, the second singlechip analyzes and processes the information and transmits the information to the second wireless communication module, the second wireless communication module transmits the information to the first wireless communication module through wireless communication, the first wireless communication module continues to transmit the information to the first singlechip, and then further executes, at the front-end execution layer, an information instruction input by the worker, such as an instruction to stop applying the voltage, because of the existence of the first wireless communication module and the second wireless communication module, the information status of the front-end execution layer can be wirelessly transmitted to the second wireless communication module through the first wireless communication module, the second wireless communication module is in bidirectional electric connection with the second single chip microcomputer, information of the front-end execution layer is transmitted to the second single chip microcomputer through the second wireless communication module, and the information after analysis and processing is displayed by the second large single chip microcomputer through the displayer. The first wireless communication module and the second wireless communication module are in bidirectional communication connection, so that information interaction between a front-end execution layer and a terminal platform layer is guaranteed, and the first wireless communication module and the second wireless communication module are both Zigbee wireless communication modules.
In order to ensure that the state of the device simulating the partial discharge is convenient for a user to monitor, the device can preset a lower limit value of the partial discharge, the state corresponding to the lower limit value of the partial discharge is also the optimal state for monitoring the partial discharge phenomenon, and on the other hand, in order to avoid the phenomenon that the partial discharge model is burnt out, the device can also preset an upper limit value of the partial discharge. When the partial discharge amount of the device reaches the upper limit value of the preset partial discharge amount, the first single chip microcomputer sends a voltage reduction instruction and transmits the voltage reduction instruction to the motor controller, the motor controller controls the forward and reverse rotating motor to rotate reversely to drive the electric voltage regulator to act, the voltage is reduced, the partial discharge amount is reduced, when the partial discharge amount of the device is reduced to be below the lower limit value of the preset partial discharge amount, the partial discharge amount is too small to be monitored conveniently, the first single chip microcomputer sends a voltage increase instruction and transmits the voltage increase instruction to the motor controller, the motor controller controls the forward and reverse rotating motor to rotate forwardly to drive the electric voltage regulator to act, the voltage is increased, the partial discharge amount of the bubble discharge model is increased, when the partial discharge amount is increased to the lower limit value of the preset partial discharge amount, the device reaches the optimal monitoring state, the electric voltage regulator stops applying pressure, and the first single chip microcomputer receives the partial discharge amount information and transmits the partial discharge amount information to the second wireless communication module of, the information is further transmitted to a second single chip microcomputer, the second single chip microcomputer analyzes and processes the received information and then transmits the information to a display, and a worker continuously monitors the partial discharge state of the device through the display.
based on the 10kV switch cabinet partial discharge simulation device, the invention also provides a 10kV switch cabinet partial discharge simulation method, which comprises the following steps:
S1: selecting the type of the required partial discharge physical model, and electrically connecting the selected partial discharge physical model with a partial discharge model slot;
s2: the user transmits an upper limit value r2, a lower limit value r1, a highest voltage set value U and a boosting command of a preset local discharge amount r to the second single chip microcomputer by using the input module, and the upper limit value r2, the lower limit value r1, the highest voltage set value U and the boosting command of the preset local discharge amount r are transmitted to the first single chip microcomputer sequentially through the second wireless communication module and the first wireless communication module;
S3: the first single chip microcomputer transmits the boosting instruction to the motor controller;
S4: the motor controller controls the forward and reverse rotation motor to rotate forward, the electric voltage regulator is driven to increase the voltage of the partial discharge simulation device, and the partial discharge physical model generates partial discharge;
S5: the partial discharge quantity q generated by the partial discharge physical model is transmitted to the first single chip microcomputer, and the first single chip microcomputer judges whether the partial discharge quantity q reaches a lower limit value r1 of a preset partial discharge quantity; if yes, go to step S6; otherwise, go to step S7;
S6: the first single chip microcomputer judges whether the partial discharge amount q reaches an upper limit value r2 of a preset partial discharge amount, if yes, the electric voltage regulator reduces the voltage and then returns to execute the step S5; otherwise, the staff continuously monitors the partial discharge state of the device through the display of the terminal platform layer and returns to execute the step S5;
S7, the voltage sampler transmits the voltage signal to the first single chip microcomputer, the first single chip microcomputer judges whether the voltage reaches a voltage highest set value U, if yes, the step S5 is executed; otherwise, the electric voltage regulator steps up the voltage, and returns to execute step S5.
Here, the upper limit r2 of the preset partial discharge amount is set to prevent the device from being broken down due to too high partial discharge amount, and therefore, when the first single chip determines that the partial discharge amount q reaches the upper limit r2 of the preset partial discharge amount, the electric voltage regulator automatically reduces the voltage, the partial discharge amount is reduced, and the process returns to step S5, that is, when the voltage is determined to be reduced until the partial discharge amount q reaches the lower limit r1 of the preset partial discharge amount, the state point where the lower limit r1 is located is the starting point for the requirement of monitoring, the partial discharge amount q is the stable discharge region between the lower limit r1 of the preset partial discharge amount and the upper limit r2 of the preset partial discharge amount, and the operator can continuously monitor the partial discharge state of the device. If the voltage reaches the highest set value U, the current partial discharge amount does not reach the lower limit value r1 of the preset partial discharge amount, and only the voltage application needs to be waited continuously, and the step S5 is executed; if the voltage does not reach the highest set value U, the current partial discharge amount does not reach the lower limit value r1 of the preset partial discharge amount, the electric voltage regulator raises the voltage, the partial discharge amount is increased, and the step S5 is returned to execute whether the partial discharge amount reaches the lower limit value r1 of the preset partial discharge amount.
Preferably, the selected types of the partial discharge physical model in step S1 include a corona discharge model, a metal gap discharge model, a bubble discharge model, and a surface creepage discharge model.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that: the partial discharge simulation device and the partial discharge simulation method for the 10kV switch cabinet, disclosed by the invention, have the advantages that the electric voltage regulator is adopted to match the preset partial discharge amount, the flexible voltage application of the device and the maintenance of the partial discharge phenomenon are ensured, the defect that the conventional partial discharge point simulation device needs to manually regulate the voltage, the stability is poor is overcome, and the stable reliability of the partial discharge simulation process is improved.
Drawings
Fig. 1 is a schematic circuit connection block diagram of a partial discharge simulation apparatus according to the present invention.
Fig. 2 is a flowchart of a partial discharge simulation method according to the present invention.
Detailed Description
the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
It will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
example 1
As shown in fig. 1, the schematic diagram of the partial discharge simulation device of the 10kV switch cabinet comprises: the system comprises a partial discharge physical model 1 for generating a partial discharge signal, a front-end execution layer 2 for receiving and processing the partial discharge signal, an execution layer power supply 3 for supplying power to the front-end execution layer 2, a terminal platform layer 4 and a platform layer power supply 5 for supplying power to the terminal platform layer 4, wherein the execution layer power supply 3 is a 220V alternating current power supply and is used for preliminarily generating a voltage signal applied to the front-end execution layer; the partial discharge physical model 1 is electrically connected with one end of a front-end execution layer 2, and the other end of the front-end execution layer 2 is electrically connected with an execution layer power supply 3; the front end execution layer 2 comprises a partial discharge input part 21, a voltage regulation part 22 and a protection part 23 which are electrically connected in sequence, wherein an electric voltage regulator used for matching preset partial discharge quantity is arranged in the voltage regulation part 22, one end of the electric voltage regulator is electrically connected with the partial discharge input part 21, and the other end of the electric voltage regulator is electrically connected with the protection part 23; the front end execution layer 2 is in communication connection with one end of the terminal platform layer 4, and the other end of the terminal platform layer 4 is electrically connected with the platform layer power supply 5.
Referring to fig. 1, the partial discharge input part 21 includes a partial discharge physical model slot matched with the partial discharge physical model 1, a high frequency current sensor for eliminating interference of a low frequency signal, a filter for narrow band filtering a partial discharge signal transmitted from the high frequency current sensor, an amplifier for amplifying the partial discharge signal, and a peak value holder for holding a peak value of the partial discharge signal; the partial discharge physical model 1 comprises a corona discharge model, a metal gap discharge model, a bubble discharge model and a surface creepage discharge model, and in a specific simulation test, the type of the selected specific partial discharge physical model can be set in a simulation mode according to the partial discharge form of the power equipment in a real scene, so that the corona discharge model, the metal gap discharge model, the bubble discharge model, the surface creepage discharge model and the electric connection between the partial discharge physical model slots can be detached and replaced; one end of the corona discharge model, one end of the metal gap discharge model, one end of the bubble discharge model and one end of the surface creepage discharge model are all electrically connected with a pin b of the partial discharge physical model slot, a pin a of the partial discharge physical model 1 slot is electrically connected with the executive layer power supply 3 sequentially through the voltage regulation part and the protection part, a pin c of the partial discharge physical model slot is electrically connected with one end of the high-frequency current sensor, and the high-frequency current sensor is electrically connected with the filter, the amplifier and the peak value retainer sequentially.
The voltage regulation part comprises an electric voltage regulator, a 10kV step-up transformer, a voltage sampler for collecting voltage signals, a first single chip microcomputer, a forward and reverse rotating motor and a motor controller for controlling the direction of the forward and reverse rotating motor, wherein the first single chip microcomputer is an STM32 series single chip microcomputer in the embodiment; one end of the peak value retainer is electrically connected with a pin d of the first single chip microcomputer, partial discharge peak value information is transmitted to the first single chip microcomputer, and the first single chip microcomputer analyzes and processes partial discharge signals received from the peak value retainer so as to obtain buck-boost instruction information adopted in the next step; the e pin electricity of first singlechip is connected machine controller, with the transmission of step-up and step-down pressure instruction information to machine controller, machine controller's other end electricity is connected the motor that is just reversing, electronic voltage regulator is connected to the other end electricity of motor that is just reversing, electronic voltage regulator is connected with 10kV step-up transformer, voltage sampler is electric connection in proper order, 10kV step-up transformer received by the voltage signal of electronic voltage regulator transmission rise to make partial discharge physical model 1 can produce partial discharge's high voltage state, the f pin of first singlechip is connected to voltage sampler's one end electricity, transmit the voltage signal who gathers to first singlechip.
Because the execution layer power supply 3 is an alternating current 220V power supply, and the partial discharge phenomenon occurs when the voltage is gradually increased to a certain degree, the voltage can be increased to a higher voltage level by the existence of a 10kV step-up transformer, the voltage value can be flexibly adjusted within a range by the electric voltage regulator so as to adapt to the scene requirement of partial discharge simulation, in the embodiment, the device generates partial discharge when the voltage signal is increased to 4kV, the first singlechip analyzes and processes the partial discharge signal received from the peak value holder and detects whether the partial discharge quantity reaches the preset limit value, the lower limit value of the partial discharge quantity set by the bubble discharge model is 5pC and the upper limit value is 200pC, when the partial discharge quantity of the device reaches the upper limit value 200pC, the first singlechip sends a step-down instruction and transmits the instruction to the motor controller, and the motor controller controls the forward and reverse rotation motor, when the partial discharge amount of the device is reduced to be below a lower limit value of 5pC, the partial discharge amount is too small to be monitored, the first singlechip sends a boosting instruction and transmits the boosting instruction to the motor controller, the motor controller controls the forward and reverse rotating motor to rotate forwards to drive the electric voltage regulator to act, the voltage is increased, the partial discharge amount of the bubble discharge model is increased, when the partial discharge amount is increased to be 5pC, the device reaches an optimal monitoring state, the electric voltage regulator stops applying pressure, the first singlechip receives the partial discharge amount information and transmits the partial discharge amount information to the second wireless communication module of the terminal execution layer through the first wireless communication module and further transmits the partial discharge amount information to the second singlechip, the second singlechip analyzes and processes the received information and transmits the information to the display, and a worker continuously monitors the partial discharge state of the device through the display, the first wireless communication module adopts a zigbee wireless communication module.
As shown in fig. 1, the protection part is an air switch group, one end of the air switch group is electrically connected with the execution layer power supply 3, the other end of the air switch group is electrically connected with the electric voltage regulator, and the air switch group has a leakage protection function and guarantees personal safety.
The terminal platform layer 4 comprises a second single chip microcomputer, a second wireless communication module in bidirectional communication connection with the first wireless communication module, a display for displaying partial discharge signals and an input module, wherein in the embodiment, the second single chip microcomputer adopts an STM32 single chip microcomputer, and the second wireless communication module adopts a zigbee wireless communication module; the second singlechip is electrically connected with the display, the analyzed and processed partial discharge signal is transmitted to the display, the input module is electrically connected with the second singlechip, the instruction input by a worker is transmitted to the second singlechip, the second singlechip analyzes and processes the instruction and transmits the instruction to the second wireless communication module, the second wireless communication module transmits the instruction to the first wireless communication module through wireless communication, the first wireless communication module continuously transmits the instruction to the first singlechip, and then further executes the instruction input by the worker, such as the instruction of stopping applying voltage, on the front-end execution layer 2, because of the existence of the first wireless communication module and the second wireless communication module, the information condition of the front-end execution layer 2 can be wirelessly transmitted to the second wireless communication module through the first wireless communication module, the second wireless communication module is bidirectionally and electrically connected with the second singlechip, and the information of the front-end execution layer 2 is transmitted to the second singlechip through the second wireless communication module, the second single chip microcomputer displays the analyzed and processed information through the displayer and allows workers in front of the terminal platform layer 4 to check the analyzed and processed information, the two-way communication connection between the first wireless communication module and the second wireless communication module guarantees the information interaction between the front-end execution layer 2 and the terminal platform layer 4, and the first wireless communication module and the second wireless communication module are both Zigbee wireless communication modules.
a flow chart of a partial discharge simulation method based on a 10kV switch cabinet partial discharge simulation device is shown in fig. 2, referring to fig. 2, the steps of the partial discharge simulation method are as follows:
S1: selecting the type of the required partial discharge physical model, and electrically connecting the selected partial discharge physical model with a partial discharge model slot; the selected types of the partial discharge physical model comprise a corona discharge model, a metal gap discharge model, a bubble discharge model and a surface creepage discharge model;
S2: the user transmits an upper limit value r2, a lower limit value r1, a highest voltage set value U and a boosting command of a preset local discharge amount r to the second single chip microcomputer by using the input module, and the upper limit value r2, the lower limit value r1, the highest voltage set value U and the boosting command of the preset local discharge amount r are transmitted to the first single chip microcomputer sequentially through the second wireless communication module and the first wireless communication module; in this embodiment, the type of the physical model of partial discharge is selected as a bubble discharge model, the upper limit value r2 of the preset partial discharge amount r is 200pC, the lower limit value r1 is 5pC, and the highest set value U of voltage is 7 kV.
s3: the first single chip microcomputer transmits the boosting instruction to the motor controller;
s4: the motor controller controls the forward and reverse rotation motor to rotate forward, the electric voltage regulator is driven to increase the voltage of the partial discharge simulation device, and the partial discharge physical model generates partial discharge;
s5: the partial discharge quantity q generated by the partial discharge physical model is transmitted to the first single chip microcomputer, and the first single chip microcomputer judges whether the partial discharge quantity q reaches a lower limit value r1 of a preset partial discharge quantity; if yes, go to step S6; otherwise, go to step S7;
S6: the first single chip microcomputer judges whether the partial discharge amount q reaches an upper limit value r2 of a preset partial discharge amount, if yes, the electric voltage regulator reduces the voltage and then returns to execute the step S5; otherwise, the staff continuously monitors the partial discharge state of the device through the display of the terminal platform layer and returns to execute the step S5;
S7, the voltage sampler transmits the voltage signal to the first single chip microcomputer, the first single chip microcomputer judges whether the voltage reaches a voltage highest set value U, if yes, the step S5 is executed; otherwise, the electric voltage regulator steps up the voltage, and returns to execute step S5.
Here, the upper limit r2 of the preset partial discharge amount is set to prevent the device from being broken down due to too high partial discharge amount, and therefore, when the first single chip determines that the partial discharge amount q reaches the upper limit r2 of the preset partial discharge amount, the electric voltage regulator automatically reduces the voltage, the partial discharge amount is reduced, and the process returns to step S5, that is, when the voltage is determined to be reduced until the partial discharge amount q reaches the lower limit r1 of the preset partial discharge amount, the state point where the lower limit r1 is located is the starting point for the requirement of monitoring, the partial discharge amount q is the stable discharge region between the lower limit r1 of the preset partial discharge amount and the upper limit r2 of the preset partial discharge amount, and the operator can continuously monitor the partial discharge state of the device. If the voltage reaches the highest set value U, the current partial discharge amount does not reach the lower limit value r1 of the preset partial discharge amount, and only the voltage application needs to be waited continuously, and the step S5 is executed; if the voltage does not reach the highest set value U, the current partial discharge amount does not reach the lower limit value r1 of the preset partial discharge amount, the electric voltage regulator raises the voltage, the partial discharge amount is increased, and the step S5 is returned to execute whether the partial discharge amount reaches the lower limit value r1 of the preset partial discharge amount.
The same or similar reference numerals correspond to the same or similar parts;
The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A10 kV cubical switchboard partial discharge analogue means which characterized in that includes: the system comprises a partial discharge physical model for generating a partial discharge signal, a front-end execution layer for receiving and processing the partial discharge signal, an execution layer power supply for supplying power to the front-end execution layer, a terminal platform layer and a platform layer power supply for supplying power to the terminal platform layer; the partial discharge physical model is electrically connected with one end of the front-end execution layer, and the other end of the front-end execution layer is electrically connected with the execution layer power supply; the front-end execution layer comprises a partial discharge input part, a voltage regulation part and a protection part which are electrically connected in sequence, wherein an electric voltage regulator used for matching preset partial discharge quantity is arranged in the voltage regulation part, one end of the electric voltage regulator is electrically connected with the partial discharge input part, and the other end of the electric voltage regulator is electrically connected with the protection part; the front end execution layer is in communication connection with one end of the terminal platform layer, and the other end of the terminal platform layer is electrically connected with the platform layer power supply.
2. the 10kV switchgear partial discharge simulation device according to claim 1, wherein the executive-level power supply is a 220V alternating-current power supply.
3. The 10kV switch cabinet partial discharge simulation device according to claim 1, wherein the partial discharge input part comprises a partial discharge physical model slot matched with a partial discharge physical model, a high-frequency current sensor for eliminating low-frequency signal interference, a filter, an amplifier and a peak value holder for holding a peak value of a partial discharge signal; the partial discharge physical model comprises a corona discharge model, a metal gap discharge model, a bubble discharge model and a surface creepage discharge model, wherein one end of the corona discharge model, one end of the metal gap discharge model, one end of the bubble discharge model and one end of the surface creepage discharge model are all electrically connected with a pin b of a partial discharge physical model slot, the pin a of the partial discharge physical model slot is sequentially connected with an execution layer power supply through a voltage regulation part and a protection part, the pin c of the partial discharge physical model slot is electrically connected with one end of a high-frequency current sensor, and the high-frequency current sensor is electrically connected with a filter, an amplifier and a peak value retainer in sequence.
4. The 10kV switch cabinet partial discharge simulation device according to claim 3, wherein the voltage regulation part comprises an electric voltage regulator, a 10kV step-up transformer, a voltage sampler for collecting voltage signals, a first single chip microcomputer, a forward and reverse rotating motor and a motor controller for controlling the direction of the forward and reverse rotating motor; one end of the peak value retainer is electrically connected with a pin d of the first single chip microcomputer and transmits partial discharge peak value information to the first single chip microcomputer; the electric motor controller is connected to the e foot electricity of first singlechip, with step-up and step-down instruction information transmission to the electric motor controller, the other end electricity of electric motor controller is connected the motor that is just reversing, and electronic voltage regulator is connected to the other end electricity of the motor that just reverses, and electronic voltage regulator is connected with 10kV step-up transformer, voltage sampler electricity in proper order, and voltage sampler's one end electricity is connected the f foot of first singlechip is with the voltage signal transmission of gathering to first singlechip.
5. The 10kV switch cabinet partial discharge simulation device according to claim 4, wherein the voltage regulation part further comprises a first wireless communication module, the first wireless communication module is electrically connected with the first single chip microcomputer in a bidirectional mode, and the first wireless communication module receives information of the terminal platform layer, transmits the information to the first single chip microcomputer, receives information of the first single chip microcomputer, and transmits the information to the terminal platform layer.
6. the 10kV switch cabinet partial discharge simulation device according to claim 1, wherein the protection part is an air switch group, one end of the air switch group is electrically connected with an executive layer power supply, and the other end of the air switch group is electrically connected with an electric voltage regulator.
7. The 10kV switch cabinet partial discharge simulation device according to claim 5, wherein the terminal platform layer comprises a second single chip microcomputer, a second wireless communication module in bidirectional communication connection with the first wireless communication module, a display for displaying a partial discharge signal and an input module; the second singlechip is electrically connected with the display and transmits the analyzed and processed partial discharge signal to the display; the input module is electrically connected with the second singlechip and transmits information input by a worker to the second singlechip; the second wireless communication module is in bidirectional electric connection with the second singlechip.
8. the 10kV switch cabinet partial discharge simulation device of claim 7, wherein the first wireless communication module and the second wireless communication module are both Zigbee wireless communication modules.
9. A10 kV switch cabinet partial discharge simulation method based on the 10kV switch cabinet partial discharge simulation device of claim 7, characterized by comprising the following steps:
s1: selecting the type of the required partial discharge physical model, and electrically connecting the selected partial discharge physical model with a partial discharge model slot;
S2: the user transmits an upper limit value r2, a lower limit value r1, a highest voltage set value U and a boosting command of a preset local discharge amount r to the second single chip microcomputer by using the input module, and the upper limit value r2, the lower limit value r1, the highest voltage set value U and the boosting command of the preset local discharge amount r are transmitted to the first single chip microcomputer sequentially through the second wireless communication module and the first wireless communication module;
s3: the first single chip microcomputer transmits the boosting instruction to the motor controller;
S4: the motor controller controls the forward and reverse rotation motor to rotate forward, the electric voltage regulator is driven to increase the voltage of the partial discharge simulation device, and the partial discharge physical model generates partial discharge;
s5: the partial discharge quantity q generated by the partial discharge physical model is transmitted to the first single chip microcomputer, and the first single chip microcomputer judges whether the partial discharge quantity q reaches a lower limit value r1 of a preset partial discharge quantity; if yes, go to step S6; otherwise, go to step S7;
s6: the first single chip microcomputer judges whether the partial discharge amount q reaches an upper limit value r2 of a preset partial discharge amount, if yes, the electric voltage regulator reduces the voltage and then returns to execute the step S5; otherwise, the staff continuously monitors the partial discharge state of the device through the display of the terminal platform layer and returns to execute the step S5;
s7, the voltage sampler transmits the voltage signal to the first single chip microcomputer, the first single chip microcomputer judges whether the voltage reaches a voltage highest set value U, if yes, the step S5 is executed; otherwise, the electric voltage regulator steps up the voltage, and returns to execute step S5.
10. The 10kV switchgear partial discharge simulation method of claim 9, wherein the selected types of the partial discharge physical model of step S1 include a corona discharge model, a metal gap discharge model, a bubble discharge model and a surface creepage discharge model.
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| CN111812459A (en) * | 2020-06-02 | 2020-10-23 | 深圳供电局有限公司 | Simulation test system applied to switch cabinet partial discharge live detection |
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