CN103353847A - Simulation device for electrical equipment discharge detection based on virtual realization and realization method thereof - Google Patents

Abstract

The invention discloses a simulation device for electrical equipment discharge detection based on virtual realization and a realization method thereof. The device comprises a virtual detection scene unit, a virtual local discharge detection unit, a local discharge failure simulation unit and a virtual detection process control unit, wherein the virtual detection scene unit simulates the physical detection environment; the virtual local discharge detection unit reads a failure model in the local discharge failure simulation unit, virtually tests the virtual detection scene unit of the according to operation sequence table of the virtual detection process control unit, and performs display. The device and the realization method thereof adopt virtual reality technology to develop realistic virtual working environment, greatly increases sense of reality of the virtual detection process and can create different virtual detection scenes according to different training requirements, so as to constantly enrich the content of the simulation training.

Description

Virtual reality-based electrical equipment discharge detection simulation device and its implementation method

technical field

The invention relates to an electrical equipment simulation device and its implementation method, in particular to a virtual reality technology-based electrical equipment discharge detection simulation device and its implementation method, belonging to the technical field of power system simulation.

Background technique

Switchgear is one of the most widely used equipment in power supply systems and large substations. Due to its complex internal insulation structure, uneven distribution of electric and thermal fields, and uninterrupted live work all year round, the accident rate is quite high, which directly affects the power supply reliability of the entire power supply system. Therefore, it is extremely important to carry out partial discharge monitoring of switch cabinets in power supply systems and large substations. After a certain period of operation of the switchgear, due to the aging and damage of the components, some parameters in the operation will change, so there are potential failures. On-line detection of switchgear has become one of the most arduous daily tasks for operation and maintenance personnel. Through the detection and simulation of the partial discharge of the switchgear, the monitoring of its operating conditions can be realized, so as to predict the failure of the switchgear and avoid the occurrence of accidents.

At present, the commonly used partial discharge detection simulation technology of switchgear is generally based on the simulation environment established by physical equipment. Although these technologies can achieve realistic simulation effects, due to the huge cost required to equip various physical equipment, and the physical equipment simulation needs to be electrified and tested under high voltage conditions, the interference is large, the safety is poor, and the efficiency is low. , making it difficult to become a universal simulation technology, unable to meet the needs of the current continuous development of power grid business.

The virtual reality technology characterized by a high degree of immersion and good interactivity can realize a realistic artificial simulation environment and effectively simulate the behavior of various human perception systems in the natural environment. It has been widely used in simulation training, virtual experiments and other fields. application. In the Chinese invention patent applications with application numbers 201210258835.8 and 201210258700.1, a partial discharge detection method of a switchgear is disclosed respectively. Both of them use virtual reality technology to realize the three-dimensional simulation of switchgear equipment, and at the same time realize the simulation function of the PDM03 partial discharge tester and the partial discharge fault model suitable for the instrument. However, the simulation methods, test steps and partial discharge fault models provided by these technical solutions are only applicable to the simulation device using PDM03 for partial discharge detection, and do not have universal applicability.

Contents of the invention

Aiming at the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a virtual reality-based electrical equipment discharge detection simulation device and its implementation method.

For realizing above-mentioned purpose of the invention, the present invention adopts following technical scheme:

On the one hand, the present invention provides a virtual reality-based electrical equipment discharge detection simulation device, including

Virtual detection scene unit, virtual partial discharge detection unit, partial discharge fault simulation unit, virtual detection process control unit; among them,

The virtual detection scene unit simulates a physical detection environment;

The virtual partial discharge detection unit reads the fault model in the partial discharge fault simulation unit, virtual tests the virtual detection scene unit according to the operation sequence list of the virtual detection process control unit, and displays it.

Preferably, the virtual detection scene unit includes a virtual metal door/window and a virtual partial discharge switchgear.

Wherein preferably, the virtual partial discharge detection unit is a virtual UltraTEV Plus+ detection instrument.

On the other hand, the present invention also provides a simulation implementation method based on the above electrical equipment discharge detection simulation device, including the following steps:

Establish virtual electrical equipment, virtual partial discharge detection instruments and partial discharge fault models;

Read in the parameters of virtual electrical equipment, virtual partial discharge detection instruments and partial discharge fault models, generate virtual detection scene units for partial discharge of electrical equipment, and generate simulated measurement indications for partial discharge faults of electrical equipment;

On-line detection of partial discharge is carried out in the virtual scene, the simulation detection data is obtained and the detection value is displayed, and the test results are analyzed.

Wherein preferably, the partial discharge fault model is established according to the background value, equipment operating status, and typical measurement indications.

Wherein preferably, the analog measurement display value includes: a partial discharge ultrasonic measurement display value and a partial discharge ultrasonic measurement display value;

The analog measurement indication is calculated by the following formula:

Partial discharge ultrasonic measurement indication value = A + (B - A) × RAND ();

Partial discharge ultrasonic measurement indication value = C + (D-C) × RAND ();

Among them, [A, B] is the value range of partial discharge to ground voltage measurement indication value under the current operating state of electrical equipment, [C, D] is the value range of partial discharge ultrasonic measurement indication value under the current operating state of electrical equipment scope.

Preferably, the step of performing online detection of partial discharge in a virtual scene and obtaining simulation detection data further includes:

Read in the operation sequence of partial discharge detection in the virtual partial discharge switchgear, and create a list of operation sequences;

The virtual detection scene unit receives user operation events, and the virtual detection process control unit judges whether the current operation event is executable according to the operation sequence;

If the operation event is inconsistent with the current operation event of the operation sequence, the operation event is discarded;

If the operation event is the same as the current operation event of the operation sequence, the user operation event is processed according to the specific operation object of the operation event and the current operation event is accumulated by one step.

Preferably, the step of processing the user operation event according to the specific operation object of the operation event further includes:

If the operation object of the operation event is to select a virtual electrical device, the operation event is returned to the virtual detection scene unit for processing, and the virtual detection scene unit sets the virtual electrical device selected by the operation event to the selected state;

If the operation object of the operation event is a button of the virtual partial discharge detection instrument, the operation event is passed to the virtual partial discharge detection unit for processing.

The electrical equipment discharge detection simulation device and its implementation method provided by the present invention use virtual reality technology to realize a highly realistic virtual working environment and greatly improve the sense of reality in the virtual detection process. The present invention can establish different virtual detection scenarios according to different training needs, and continuously enrich the content of simulation training.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of an electrical equipment discharge detection simulation device;

Fig. 2 is a virtual scene diagram of an electrical equipment discharge detection simulation device;

Fig. 3 is a schematic diagram of a model of a virtual partial discharge switchgear in one embodiment of the present invention;

Fig. 4 is a schematic diagram of the model of the virtual UltraTEV Plus+ detection instrument in one embodiment of the present invention;

Figure 5 is a model diagram of the auxiliary equipment of the virtual UltraTEV Plus+ detection instrument;

Fig. 6 is a schematic flow chart of a method for realizing the simulation of electrical equipment discharge detection;

Figure 7 is a schematic diagram of the operation flow of the virtual UltraTEV Plus+ detection instrument.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the present invention provides a virtual reality-based electrical equipment discharge detection simulation device, the electrical equipment discharge detection simulation device includes: a virtual detection scene unit, a virtual partial discharge detection unit, a partial discharge fault simulation unit, a virtual detection The process control unit; the virtual detection scene unit simulates the physical detection environment; the virtual partial discharge detection unit reads the fault model in the partial discharge fault simulation unit, virtual tests the virtual detection scene unit according to the operation sequence list of the virtual detection process control unit and performs display detection result. In the following, taking the electrical equipment as a switch cabinet as an example, the electrical equipment discharge detection simulation device will be described in detail.

In the present invention, the virtual detection scene unit is a virtual detection environment of three-dimensional graphics established according to training needs, simulating the working scene of partial discharge detection of switch cabinets. As shown in FIG. 2 , the virtual detection scene unit includes a virtual high-voltage equipment room, and the virtual high-voltage equipment room is provided with virtual metal doors, virtual metal windows, virtual partial discharge switch cabinets, and the like. Multiple virtual partial discharge switchgears are arranged in the virtual high-voltage equipment room according to the electrical characteristics, constituting the virtual detection scene unit of the simulation device. Among them, the layout and number of virtual partial discharge switch cabinets can be flexibly set according to specific training needs, and different virtual detection scenarios can be established to continuously enrich the training content.

The virtual detection scene unit is preferably imported from 3DMax software. In one embodiment of the present invention, the virtual high-voltage equipment room is a rectangular room displayed with three-dimensional graphics, including four virtual walls, four virtual metal windows and a virtual metal door. The virtual metal windows and virtual metal doors are respectively named win1, win2, win3, win4, and door1, and the virtual metal windows and virtual metal doors can receive operation events. As shown in FIG. 3 , the virtual partial discharge switchgear is presented in a three-dimensional graphic manner, preferably every group of four virtual partial discharge switchgears. Four groups of virtual partial discharge switch cabinets are preferably placed in the virtual high-voltage equipment room to form the tested equipment of the simulation device. The virtual partial discharge switchgear is named according to the serial number, which are: switchgear 1, switchgear 2, switchgear 3, switchgear 4, switchgear 5, switchgear 6, switchgear 7, switchgear 8, switchgear 9, switchgear Cabinet 10, switch cabinet 11, switch cabinet 12, switch cabinet 13, switch cabinet 14, switch cabinet 15, switch cabinet 16. Virtual PD switchgear can accept operational events.

UltraTEV Plus+ is the most widely used instrument for on-line detection of partial discharge in switchgear. As shown in Figure 4, the virtual partial discharge detection unit is preferably a virtual UltraTEV Plus+ detection instrument, a virtual UltraTEV Plus+ detection instrument, and virtual auxiliary equipment that are simulated using UltraTEV Plus+ as a prototype. The virtual UltraTEV Plus+ detection instrument includes the instrument body, buttons, display and other components. The body part of the virtual UltraTEV Plus+ testing instrument is a three-dimensional figure named UltraTEV Plus body. The virtual UltraTEV Plus+ detection instrument has six operable buttons: power, up, down, left, right, and OK, named respectively: power button, up button, down button, left button, right button, and confirmation button. Power button, up button, down button, left button, right button, confirmation button, these buttons can be operated through the mouse, and simulate the function of the instrument to switch the working mode and display mode. Instrument body parts can receive operational events. The display screen of the virtual testing instrument is a rectangular map component that can display test results according to the display mode, named: LCD screen. As shown in Figure 5, the connection terminals of the virtual UltraTEVPlus+ testing instrument can be connected to auxiliary equipment such as sound-proof earphones, rubber focusing probes, and stethoscopes (contact type). The virtual UltraTEV Plus+ testing instruments and virtual auxiliary equipment are arranged in the virtual high-voltage equipment room according to the electrical characteristics, constituting the virtual testing equipment of the simulation device.

The partial discharge fault simulation unit reads in the typical test data of the virtual UltraTEV Plus+ testing instrument (also known as typical measurement indications, such as fault model ultrasonic measurement indications, fault model ground voltage measurement indications), and establishes background values, equipment operating status, Correspondence between typical measurement indications, and establish a partial discharge fault model. The partial discharge fault model of the switchgear simulates the test indications of UltraTEV Plus+ testing instruments under different operating conditions of the switchgear (for example, the partial discharge model of the switchgear can simulate the abnormal conditions of the equipment’s ground voltage and ultrasonic waves during the partial discharge of the switchgear), virtual partial discharge detection The unit performs on-line virtual detection of switchgear partial discharge in the partial discharge fault model.

The virtual detection process control unit reads in the operation sequence of the partial discharge detection of the virtual partial discharge switchgear from the parameter file, and establishes an operation sequence list. Operational events such as detection operation type and three-dimensional virtual equipment component names are transmitted from the virtual detection scene unit to the virtual detection process control unit. The virtual partial discharge detection unit reads the fault model in the partial discharge fault simulation unit, virtually detects and displays the virtual detection scene unit according to the operation sequence list of the virtual detection process control unit.

In order to further reflect the advanced nature of the electrical equipment discharge detection simulation device described in the present invention, the present invention also provides a simulation implementation method based on the above electrical equipment discharge detection simulation device, including the following steps: establishing virtual electrical equipment, virtual partial discharge detection Instrument and partial discharge fault model; read in the parameters of virtual electrical equipment, virtual partial discharge detection instrument and partial discharge fault model, generate a virtual detection scene unit for partial discharge of electrical equipment, and generate simulated measurement indications for partial discharge faults of switchgear; Perform partial discharge online detection in the virtual scene to obtain simulation detection data and display the detection value, and analyze the test results.

First, the specific steps of establishing virtual electrical equipment, virtual partial discharge detection instrument and partial discharge fault model are introduced:

1) Create a virtual electrical device

Next, taking the establishment of virtual partial discharge switchgear as a preferred example, the method for establishing virtual electrical equipment will be described in detail.

In general, the establishment of a virtual high-voltage equipment room is based on physical electrical equipment, and a virtual high-voltage equipment room is established to simulate a real experimental site through virtual metal doors/windows and metal-enclosed virtual partial discharge switchgear. A set of virtual partial discharge switch cabinets is set in the virtual high voltage equipment room, wherein the partial discharge points of the virtual partial discharge switch cabinets correspond to the partial discharge points of the partial discharge model. Setting up a virtual partial discharge switchgear includes the following steps: First, a virtual high-voltage equipment room is established using virtual reality technology. In the present invention, existing mature commercial modeling tools, such as 3D modeling software 3DSMax, etc. can be selected for electrical equipment modeling. Specifically, as shown in Figure 2, 3DMax commercial software is used to simulate various physical equipment in the high-voltage equipment room to establish a virtual high-voltage equipment room. Then, in the virtual high-voltage equipment room, a group of virtual partial discharge switchgears is set up using virtual reality technology; as shown in Figure 3, 3DMax commercial software is used to establish a virtual partial discharge Partial discharge switchgear. The surface of the virtual partial discharge switchgear is realized by mapping. As shown in Figure 2, multiple virtual partial discharge switchgears are arranged in the virtual high-voltage equipment room according to the electrical characteristics, constituting the virtual detection electrical equipment of the simulation device. Again, set partial discharge points on the virtual partial discharge switchgear. Specifically, a point is selected inside the virtual partial discharge switchgear as a partial discharge point, and the corresponding relationship between the partial discharge point and the partial discharge model test value is formed.

It should be understood that the detection of virtual metal doors and virtual metal windows in the virtual high-voltage equipment room can also establish corresponding virtual metal doors and virtual metal windows according to the above method, which will not be repeated here.

2) Establish a virtual partial discharge detection instrument

When performing partial discharge detection on electrical equipment in substations, the most widely used method is to detect metal-enclosed virtual partial discharge switchgear in virtual high-voltage equipment rooms. The partial discharge detection instrument for partial discharge detection of these electrical equipment is preferably a multifunctional handheld partial discharge detector (UltraTEV Plus+).

In the present invention, the instrument model of the detection instrument is established according to the performance parameters of the detection instrument (such as a multifunctional handheld partial discharge detector) used in the partial discharge detection and positioning experiment of the switchgear. In one embodiment of the present invention, using virtual reality technology, using the detection instrument used in the detection and positioning of switchgear partial discharge as a prototype, its external structure is virtualized on the computer, and the positions of its various components are set, as well as the actual The detection instrument has the same function. The following is a preferred example of establishing a virtual UltraTEV Plus+ testing instrument to simulate a real experimental instrument based on a multifunctional handheld partial discharge detector based on physical electrical equipment, and will give a detailed description of the method of establishing a virtual partial discharge testing instrument:

Take the UltraTEV Plus+ testing instrument as a prototype to virtual UltraTEV Plus + testing instrument. According to the shape and structure of UltraTEV Plus + testing instrument, the shell of UltraTEV Plus + testing instrument is virtualized; the simulation parts of UltraTEV Plus + testing instrument are virtualized on the shell of UltraTEV Plus + testing instrument; the simulation parts include three-dimensional buttons, terminals, and three-dimensional display screen; in addition, it can also include Connecting headphone, rubber focusing probe, stethoscope (contact type) and other auxiliary equipment.

Specifically, 3DMax commercial software is used to establish a virtual UltraTEV Plus + testing instrument according to the proportional relationship between the length, width, and height of the UltraTEV Plus + testing instrument, and the shell of the instrument is realized by using textures. As shown in Figure 4, import the instrument shell made by 3DMax commercial software, and define the scope and functions of the controls on the instrument in the following ways: (1) Superimpose a LCD screen model at the position of the display screen directly above the instrument shell to simulate Test the functionality of the instrument display. (2) At the position of the button directly above the instrument shell, superimpose six button models of up, down, left, right, confirmation, and power buttons, and define their attributes according to their functions, respectively simulating the up, down, and left buttons in the testing instrument. , Right, Confirm, Power button functions. (3) Overlay the corresponding jack and indicator models at the positions of the headphone jack, probe jack and indicator light on the front of the instrument shell, define their attributes according to their functions, and simulate the functions of the jacks and indicator lights in the testing instrument respectively.

As shown in Figure 5, it should be understood that other auxiliary equipment such as sound-proof earphones, rubber focusing probes, stethoscopes (contact type) and other auxiliary equipment of the virtual UltraTEV Plus+ testing instrument can also establish corresponding virtual 3D models according to the above method, so I won’t go into details here .

3) Establish a partial discharge fault model

The partial discharge fault model is used to simulate the abnormal conditions of the ground voltage and ultrasonic waves during the partial discharge of the switchgear. The partial discharge fault model is attached to the virtual electrical equipment and is generated in the three-dimensional space of the virtual partial discharge switchgear. The faulty virtual partial discharge switchgear is determined by a predefined initialization file, and the fault location is randomly generated, including normal, abnormal, and uncertain Three operating states. The partial discharge fault model can not only qualitatively simulate the display values such as the discharge amplitude, pulse number and discharge intensity measured by the ultrasonic measurement method under different operating conditions, but also qualitatively simulate the earth-to-ground fault of the virtual partial discharge switchgear enclosure under different operating conditions. Indication of voltage value.

According to the typical data of partial discharge detection and location detection of virtual partial discharge switchgear, the corresponding relationship among background value, equipment operation status and typical measurement indication value is established to form a partial discharge fault model. In one embodiment of the present invention, a partial discharge fault model of the virtual partial discharge switchgear is established for the ultrasonic waves generated by the partial discharge of the virtual partial discharge switchgear and the ground voltage.

Table 1 is the typical test data obtained by UltraTEV Plus + testing instrument ultrasonic measurement in the partial discharge detection and positioning experiment of the virtual partial discharge switchgear, which describes the operating status, background value and ultrasonic waves measured by the UltraTEV Plus + testing instrument of the typical virtual partial discharge switchgear. relationship between values. The fault model of ultrasonic detection is qualitatively simulated by computer simulation according to Table 1, and the fault model of ultrasonic detection as the partial discharge model of virtual partial discharge switchgear is obtained.

Background values Fault-free measurement indication Uncertain measurement indication Measuring indication in the event of a fault 0～10dB Value≤20dB 20<value≤30dB 30<value 10～20dB Value≤20dB 25<value≤30dB 30<value

Table 1 The value range of the ultrasonic measurement indication value in the fault model

Table 2 is the typical test data obtained from the ground voltage measurement of the UltraTEV Plus + detection instrument in the partial discharge detection and positioning experiment of the virtual partial discharge switchgear. The relationship between the indications of the switchgear enclosure and the ground voltage. The fault model of ground voltage detection is qualitatively simulated according to Table 2 to obtain the voltage measurement fault model as the partial discharge model of the virtual partial discharge switchgear.

Background values Fault-free measurement indication Uncertain measurement indication Measuring indication in the event of a fault 0～10dB Value≤0dB 0<value≤6dB 6<value

Table 2 The value range of the indication value of the ground voltage measurement in the fault model

When the electrical equipment discharge detection simulation device is started, a virtual partial discharge switchgear is randomly selected in the virtual partial discharge switchgear and set to an abnormal or uncertain state, and the rest of the virtual partial discharge switchgear is in a normal state. The fault model program is based on the virtual partial discharge switchgear The state of the discharge switchgear, according to the range given in Table 1 and Table 2, generates simulated data for each virtual partial discharge switchgear within the corresponding value range. During the test, the virtual detection instrument looks up the simulated data through the name of the virtual partial discharge switchgear for display. According to the fault type, the fault model generates a partial discharge data within the scope of Table 1 and Table 2. When performing partial discharge detection, move the probe of the virtual detection instrument to the surface or gap of the device under test, and press the ok button , the virtual testing instrument reads the partial discharge data generated by the fault model of the tested equipment and displays it on the screen of the virtual testing instrument.

Secondly, it introduces the steps of reading in the parameters of virtual electrical equipment, virtual partial discharge detection instrument and partial discharge fault model, generating a virtual detection scene unit for partial discharge of electrical equipment, and generating simulated measurement indications for partial discharge faults of switchgear. The following is an example where the virtual electrical equipment is a virtual partial discharge switchgear and the virtual partial discharge detection instrument is UltraTEV Plus + virtual detection instrument:

1) Read in the parameters of the virtual UltraTEV Plus+ testing instrument and virtual auxiliary equipment. In this step, read in the pre-established virtual UltraTEV Plus+ testing instrument, button, display and other components definition parameters, experimental virtual auxiliary equipment and other data, and prepare for display and operation in the virtual testing scene unit.

2) Read in the parameters of the virtual partial discharge switchgear.

In this step, the parameters of the pre-defined virtual partial discharge switchgear are read in, and all virtual partial discharge switchgears are generated according to parameters such as position, display scale, and name.

3) Read in the fault model parameters.

In this step, the predefined partial discharge model and its configuration parameters are read in, and fault points are generated in the specified virtual partial discharge switchgear. The fault model is defined in the configuration file, which can be modified according to the different test objects.

The fault model parameters read include ultrasonic detection fault model parameters and ground voltage detection fault model parameters. The ultrasonic detection fault model is read in the format of Table 1, and the ground voltage detection fault model is read in the format of Table 2.

4) Generate a virtual scene for online detection of partial discharge in virtual partial discharge switchgear, and generate simulated measurement indications for partial discharge faults in switchgear.

The virtual detection scene unit is a three-dimensional graphic virtual environment. The virtual partial discharge switchgear partial discharge online detection virtual scene consists of a virtual high-voltage equipment room, four rows of virtual partial discharge switchgear, virtual UltraTEV Plus+ detection instruments and auxiliary equipment, etc., among which All the devices are presented in three-dimensional graphics to generate a virtual partial discharge switchgear PD online detection virtual scene, the simulation device randomly generates a partial discharge point in a virtual partial discharge switchgear according to the configuration parameters, and the virtual partial discharge switchgear The partial discharge point of the partial discharge point corresponds to the partial discharge point of the partial discharge model, and the virtual UltraTEV Plus+ detection instrument can perform online virtual detection of the partial discharge of the virtual partial discharge switchgear.

The method for generating the analog measurement indication value of the partial discharge fault of the switchgear mainly includes the following steps:

(1) Generate the background value of the virtual detection scene unit. The background value of the virtual detection scene unit is a random number generated by a computer random function, and the value range of the background value of the virtual detection scene unit is between [0, 20].

(2) Use the computer random function to randomly generate a virtual partial discharge switchgear operating state data for the virtual partial discharge switchgear. There are three operating states of the virtual partial discharge switchgear, namely: 0, 1, and 2 represent normal state, uncertain state, and abnormal state, respectively.

(3) Calculate the value range of typical measurement indications. Read the background value of the virtual detection scene unit and the operating state of the virtual partial discharge switchgear, use the background value of the virtual detection scene unit and the operating state of the virtual partial discharge switchgear as the index, search for the partial discharge fault model, and determine the partial discharge to ground voltage measurement display The value range [A, B] of the value and the value range [C, D] of the partial discharge ultrasonic measurement indication.

(4) Calculate the virtual typical measurement indication. According to the value range [A, B] of partial discharge to ground voltage measurement indication and the value range [C, D] of partial discharge ultrasonic measurement indication value, use the computer random function to randomly generate a value within the range of [A, B] and a value in the range of [C, D], that is, the partial discharge-to-ground voltage measurement indication value and partial discharge ultrasonic measurement indication value of the virtual partial discharge switchgear. The calculation formula is explained as follows:

Partial discharge ultrasonic measurement indication value = A + (B - A) × RAND ();

Partial discharge ultrasonic measurement indication = C + (D-C) × RAND ().

(5) Repeat step (4) until the measurement indications of all virtual partial discharge switchgears in the virtual detection scene unit are generated.

Finally, it introduces the specific steps of performing on-line detection of partial discharge in the virtual scene, obtaining simulation detection data and displaying the detection value, and analyzing the test results. :

1) Read in the operation sequence of partial discharge detection in the virtual partial discharge switchgear, and create a list of operation sequences.

After the electrical equipment discharge detection simulation device is started, the operation sequence of the partial discharge detection of the virtual partial discharge switchgear is read from the parameter file, and the operation sequence list is established. The operation sequence list includes a virtual partial discharge switchgear partial discharge ground voltage detection operation sequence list and a virtual partial discharge switchgear partial discharge ultrasonic detection operation sequence list.

The operation sequence list of partial discharge voltage detection for virtual partial discharge switchgear includes the following operation sequence:

Start the virtual UltraTEV Plus+ detection instrument

Enter 'select' mode

Enter the 'Voltage Test' mode

Select the virtual metal door, virtual metal window to test the background value of the virtual detection scene unit

Number of tested virtual partial discharge switchgears 16

Select the virtual partial discharge switchgear to test the partial discharge voltage to ground of the virtual partial discharge switchgear

Display of typical measurement indications and selection of processing methods

end test

Display the number of measurements and processing accuracy.

The partial discharge ultrasonic detection operation sequence list of the virtual partial discharge switchgear, including the following operation sequence:

Start the virtual UltraTEV Plus+ detection instrument

Enter 'select' mode

Enter the 'ultrasonic test' mode

Select the virtual metal door or virtual metal window to test the background value of the virtual detection scene unit

Number of tested virtual partial discharge switchgears 16

Select virtual partial discharge switchgear to test partial discharge ultrasound of virtual partial discharge switchgear

Display of typical measurement indications and selection of processing methods

end test

Display the number of measurements and processing accuracy.

2) The virtual detection scene unit receives user operation events, and the virtual detection process control unit judges whether the current operation event is executable according to the operation sequence.

The operation event is transmitted from the virtual detection scene unit to the virtual detection process control unit, and the operation event includes information such as operation type and name of three-dimensional virtual equipment components. The virtual detection process control unit compares the operation event with the operation sequence, and discards the operation event if the operation event is inconsistent with the current operation event of the operation sequence. If the operation event is the same as the current operation event of the operation sequence, the user operation event is processed according to the specific operation object of the operation event and the current operation event is accumulated by one step.

The steps for processing user operation events according to the specific operation objects of the operation events are as follows: if the operation objects of the operation events are virtual doors, windows, and virtual partial discharge switch cabinets, the operation events are returned to the virtual detection scene unit for processing, and the virtual detection scene unit Sets the device in the action event to the selected state. If the operation object of the operation event is the button of the virtual UltraTEV Plus + detection instrument, the operation event is passed to the virtual UltraTEV Plus + detection instrument for processing.

As shown in Figure 7, the process of the electrical equipment discharge detection simulation device using the virtual UltraTEV Plus+ testing instrument to simulate and test the virtual electrical equipment is as follows: (1) Select the virtual testing instrument with the mouse, and then click the power button to turn on the power of the testing instrument. Press the 'power button', if the detection instrument is in the off state, the detection instrument will enter the power on state, and the test mode will be displayed as the voltage test mode. If the detection instrument is in the power-on state, the detection instrument enters the shutdown state without any display on the LCD screen, and the test mode is set to the non-working state. (2) Before the detection starts, first detect and record the indication value of the interference of the environmental background, that is, use the mouse to click on the virtual metal door/window and other equipment in the virtual detection scene unit, and record the indication value of the background interference. (3) When the LCD screen displays the voltage test mode, press the 'up key' or 'down key', the test mode enters the selection mode, and the LCD screen displays two lines of 'voltage test mode' and 'ultrasonic test mode', and select 'Voltage Test Mode' line. Click the virtual partial discharge switchgear in the virtual detection scene unit with the mouse, and the scene will automatically roam to the front of the selected virtual partial discharge switchgear, and at the same time, the detection instrument will display the currently detected indication value. (4) When the LCD screen displays the ultrasonic test mode, press the 'up key' or 'down key', the test mode enters the selection mode, and the LCD screen displays two lines of 'voltage test mode' and 'ultrasonic test mode', and select 'Ultrasonic Test Mode' line. In the ultrasonic detection mode, the gap of the virtual partial discharge switchgear cabinet is displayed in red, indicating that only the gap can be detected. Click the gap position of the virtual partial discharge switchgear with the mouse, and the scene will automatically roam to the front of the selected virtual partial discharge switchgear, and at the same time, the detection instrument will display the currently detected indication value. (5) Test mode When selecting a mode, press the 'Up key' or 'Down key', if the line 'Voltage test mode' is currently selected, then the line 'Ultrasonic test mode' is selected; if the line currently selected is ' Ultrasonic Test Mode' row, the 'Voltage Test Mode' row is selected. (7) Test mode When selecting a mode, press the "Enter key", if the current selection is the "voltage test mode" line, the test mode will enter the "voltage test mode"; if the current selection is the "ultrasonic test mode" line , the test mode enters into 'ultrasonic test mode'. (6) Test mode In the voltage test mode, press the "confirmation key" to obtain the measured value of the ground voltage and display it on the LCD screen. (7) Test mode When in the ultrasonic test mode, press the "confirmation key" to obtain the indicated value of the ultrasonic measurement and display it on the LCD screen. (8) After displaying the currently detected indication value, a test result evaluation interface pops up, prompting the inspector to evaluate the status of the electrical equipment.

In summary, the present invention adopts virtual reality technology to develop a highly realistic virtual working environment, which greatly improves the realism of the virtual detection process. Utilizing the present invention, fully digital virtual equipment and virtual instruments can be realized, and different virtual detection scenarios can be established according to different training needs, so as to continuously enrich training content.

The virtual reality-based electrical equipment discharge detection simulation device and its implementation method provided by the present invention have been described in detail above. For those skilled in the art, any obvious changes made to it without departing from the essence of the present invention will constitute an infringement of the patent right of the present invention and will bear corresponding legal responsibilities.

Claims (8)

1. The utility model provides an electrical equipment discharge detection simulation device based on virtual reality which characterized in that includes:

the system comprises a virtual detection scene unit, a virtual partial discharge detection unit, a partial discharge fault simulation unit and a virtual detection process control unit;

the virtual detection scene unit simulates a physical detection environment;

and the virtual partial discharge detection unit reads the fault model in the partial discharge fault simulation unit, virtually tests the virtual detection scene unit according to an operation sequence table of the virtual detection process control unit and displays the virtual detection scene unit.

2. The electrical equipment discharge detection simulation apparatus of claim 1, wherein the virtual detection scene unit comprises a virtual metal door/window and a virtual partial discharge switch cabinet.

3. The electrical equipment discharge detection simulation apparatus of claim 1, wherein the virtual partial discharge detection unit is a virtual UltraTEV Plus + detection instrument.

4. A simulation realization method based on the electrical equipment discharge detection simulation device of any one of claims 1 to 3, characterized by comprising the following steps:

establishing a virtual electrical device, a virtual partial discharge detector and a partial discharge fault model;

reading parameters of virtual electrical equipment, a virtual partial discharge detector and a partial discharge fault model, generating a virtual detection scene unit aiming at partial discharge of the electrical equipment, and generating a simulated measurement indicating value of the partial discharge fault of the switch cabinet;

and carrying out local discharge online detection in a virtual scene to obtain simulation detection data, displaying a detection value, and analyzing a test result.

5. The simulation implementation method of claim 4, wherein the partial discharge fault model is established according to a background value, an equipment operation state and a typical measurement indication value.

6. The simulation implementation method of claim 4, wherein the simulating a measurement indication comprises: partial discharge ultrasonic measurement indicating values and partial discharge ultrasonic measurement indicating values;

the analog measurement indication is calculated by:

partial discharge ultrasonic measurement index value is a + (B-a) × RAND ();

partial discharge ultrasonic measurement index value ═ C + (D-C) x RAND ();

wherein [ A, B ] is the value range of the partial discharge voltage-to-ground voltage measurement indication value in the current operation state of the switch cabinet, and [ C, D ] is the value range of the partial discharge ultrasonic measurement indication value in the current operation state of the switch cabinet.

7. The simulation implementation method of claim 4, wherein the step of performing online partial discharge detection in the virtual scene to obtain the simulation detection data further comprises:

reading an operation sequence of the partial discharge detection of the virtual partial discharge switch cabinet and establishing an operation sequence list;

the virtual detection scene unit receives a user operation event, and the virtual detection process control unit judges whether the current operation event can be executed or not according to the operation sequence;

if the operation event is inconsistent with the current operation event of the operation sequence, discarding the operation event;

and if the operation event is the same as the current operation event of the operation sequence, processing the user operation event according to the specific operation object of the operation event and accumulating the current operation event by one step.

8. The simulation implementation method of claim 7, wherein the step of processing the user operation event according to the specific operation object of the operation event further comprises:

if the operation object of the operation event is to select the virtual electrical equipment, the operation event is returned to the virtual detection scene unit for processing, and the virtual detection scene unit sets the virtual electrical equipment in the operation event to be in a selected state;

and if the operation object of the operation event is a key of the virtual partial discharge detection instrument, the operation event is transmitted to the virtual partial discharge detection unit for processing.

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