CN211180171U - Circuit breaker simulation device based on electrical characteristics and dynamic characteristics - Google Patents
Circuit breaker simulation device based on electrical characteristics and dynamic characteristics Download PDFInfo
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- CN211180171U CN211180171U CN201922187979.9U CN201922187979U CN211180171U CN 211180171 U CN211180171 U CN 211180171U CN 201922187979 U CN201922187979 U CN 201922187979U CN 211180171 U CN211180171 U CN 211180171U
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Abstract
The utility model discloses a circuit breaker analogue means based on electric characteristic and dynamic characteristic, wherein, the human-computer interaction unit sends the parameter setting instruction to microprocessor unit, accurate time base unit provides the work clock for microprocessor unit, microprocessor unit carries the parameter that the human-computer interaction unit set up to electric characteristic unit and dynamic characteristic unit, electric characteristic unit and dynamic characteristic unit are when microprocessor unit receives triggering signal, simulate circuit breaker's divide-shut brake function and circuit breaker drive mechanism's motion respectively, and send electric characteristic parameter and dynamic characteristic parameter to microprocessor unit. Through the technical scheme of the utility model, both have multiple functional, easy operation, convenient to use's advantage, also have the strong maneuverability's of time, stroke, speed and the electric current optional setting characteristics, can regard as the important corollary equipment of the experimental work of relay protection, also can regard as the check standard of high-voltage circuit breaker dynamic characteristic tester.
Description
Technical Field
The utility model relates to an electric power test technical field especially relates to a circuit breaker analogue means based on electric characteristic and dynamic characteristic.
Background
The high-voltage circuit breaker is the most critical electrical equipment in high-voltage power transmission, and is a necessary equipment in power distribution equipment of a power plant and a transformer substation as a device for connecting and disconnecting a power transmission loop. Because the high-voltage circuit breaker has double tasks of control and protection in the power system, the condition of the state of the high-voltage circuit breaker directly influences the safe operation of the power system, and the condition detection of the mechanical characteristics of the high-voltage circuit breaker is very important.
The high-voltage circuit breaker dynamic characteristic tester is a main instrument for detecting the mechanical characteristics of the high-voltage circuit breaker, and is also important for performance detection of the high-voltage circuit breaker dynamic characteristic tester; in the operation process of the circuit breaker, the test of the relay protection equipment for driving the opening and closing actions of the circuit breaker is also important.
In the prior art, a state detection device of a related high-voltage circuit breaker characteristic tester is not provided, so that the test standard of the high-voltage circuit breaker dynamic characteristic tester cannot be provided, and supporting equipment for relay protection test work cannot be provided.
SUMMERY OF THE UTILITY MODEL
In view of at least one of the above problems, the utility model provides a circuit breaker analogue means based on electrical property and dynamic characteristic, through the divide-shut brake function of simulation high voltage circuit breaker main fracture, the function of closing and separating brake of auxiliary contact, the function simulation of the size and the pulse width length of closing and separating brake coil current, and the linear drive of circuit breaker motion connecting rod, the rotatory transmission function of pivot, whether the measurement of detectable high voltage circuit breaker dynamic characteristic tester each parameter is accurate, including main fracture closing and separating brake time specifically, auxiliary contact closing and separating brake time, closing and separating brake coil current size and pulse width length, the stroke, speed parameter, both have multiple functional, easy operation, convenient to use's advantage, also have the characteristics of time, the stroke, the maneuverability that speed and electric current can set up wantonly, can be as the important corollary equipment of relay protection test work, the tester can also be used as the inspection standard of a dynamic characteristic tester of the high-voltage circuit breaker.
In order to achieve the above object, the present invention provides a circuit breaker simulation apparatus based on electrical characteristics and dynamic characteristics, including: the system comprises a microprocessor unit, a human-computer interaction unit, a data storage unit, a precise time base unit, a trigger unit, an electrical characteristic unit and a dynamic characteristic unit, wherein the human-computer interaction unit, the data storage unit, the precise time base unit, the trigger unit, the electrical characteristic unit and the dynamic characteristic unit are respectively connected with the microprocessor unit; the human-computer interaction unit sends a parameter setting instruction to the microprocessor unit, the accurate time base unit provides a working clock for the microprocessor unit, the trigger unit sends a trigger signal to the microprocessor unit when being triggered, and the data storage unit is used for storing electrical characteristic parameters or dynamic characteristic parameters to be collected by the microprocessor unit; the microprocessor unit transmits the parameters set by the human-computer interaction unit to the electrical characteristic unit and the dynamic characteristic unit, and the electrical characteristic unit and the dynamic characteristic unit respectively simulate the opening and closing functions of the circuit breaker and the movement of a circuit breaker transmission mechanism when the microprocessor unit receives the trigger signal, and transmit the electrical characteristic parameters and the dynamic characteristic parameters to the microprocessor unit.
In the above technical scheme, preferably, the electrical characteristic unit includes a main fracture opening and closing control assembly, an opening auxiliary contact control assembly, a closing coil control assembly and an opening coil control assembly, the main fracture opening and closing control assembly is used for simulating the closing and opening functions of the main port of the circuit breaker, the opening auxiliary contact control assembly is used for simulating the opening auxiliary contact in the opening process of the circuit breaker to cut off the current function of the opening coil, the closing auxiliary contact control assembly is used for simulating the closing auxiliary contact in the closing process of the circuit breaker to cut off the current function of the closing coil, the closing coil control assembly is used for simulating the current size and the pulse width length of the closing coil of the circuit breaker, and the opening coil control assembly is used for simulating the current size and the pulse width length of the opening coil of the circuit breaker.
In the above technical solution, preferably, the dynamic characteristic unit includes an orthogonal encoder driving component, a linear motor driving component, a linear transmission mechanism, a magnetic grid ruler collecting component, a rotary motor driving component, a rotary transmission mechanism and a rotary encoder collecting component, the orthogonal encoder driving component is used for simulating orthogonal encoder signals output when a main shaft of the circuit breaker rotates, the linear motor driving component is used for driving the linear transmission mechanism to do linear motion, and a linear motion function for simulating a transmission connecting rod of the circuit breaker, the magnetic grid ruler acquisition assembly is used for acquiring the operation data of the linear transmission mechanism, the rotary motor driving assembly is used for driving the rotary transmission mechanism to rotate, and the rotary encoder acquisition assembly is used for acquiring the operation data of the rotary transmission mechanism.
In the above technical solution, preferably, the circuit breaker simulation apparatus is connected to a circuit breaker dynamic characteristic tester or a relay protection test device to be tested through a test interface, and receives test data of the circuit breaker dynamic characteristic tester or the relay protection test device.
In the above technical solution, preferably, the microprocessor unit sends the collected electrical characteristic parameters and the collected dynamic characteristic parameters to the human-computer interaction unit for comparison and display with the test data received by the test interface.
Compared with the prior art, the beneficial effects of the utility model are that: the device has the advantages of complete functions, simplicity in operation and convenience in use, and has the characteristics of strong operability of time, stroke, speed and current, and can be used as important corollary equipment for relay protection test work and as the inspection standard of a dynamic characteristic tester of the high-voltage circuit breaker.
Drawings
Fig. 1 is a schematic structural diagram of a circuit breaker simulation apparatus based on electrical characteristics and dynamic characteristics according to an embodiment of the present invention;
fig. 2 is an embodiment of the present invention discloses a switching-on electrical characteristic output waveform diagram;
fig. 3 is an output waveform diagram of the switching-off electrical characteristic disclosed in an embodiment of the present invention;
fig. 4 is a waveform diagram of a clockwise rotation quadrature signal of a quadrature encoder according to an embodiment of the present invention;
fig. 5 is a diagram illustrating a counter-clockwise rotation quadrature signal waveform of a quadrature encoder according to an embodiment of the present invention;
fig. 6 is a switching-on dynamic characteristic output oscillogram based on the orthogonal encoder according to an embodiment of the present invention;
fig. 7 is an embodiment of the present invention discloses a switching-off characteristic output waveform diagram based on a quadrature encoder.
In the drawings, the correspondence between each component and the reference numeral is:
11. the system comprises a microprocessor unit, 12 a man-machine interaction unit, 13 a data storage unit, 14 an accurate time base unit, 15 a trigger unit, 16 an electrical characteristic unit, 161 a main fracture opening and closing control component, 162 an opening auxiliary contact control component, 163 a closing auxiliary contact control component, 164 a closing coil control component, 165 an opening coil control component, 17 a dynamic characteristic unit, 171 an orthogonal encoder driving component, 172 a linear motor driving component, 173 a linear transmission mechanism, 174 a magnetic grid ruler acquisition component, 175 a rotary motor driving component, 176 a rotary transmission mechanism, 177 a rotary encoder acquisition component.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, according to the present invention, a circuit breaker simulator based on electrical characteristics and dynamic characteristics comprises: the system comprises a microprocessor unit 11, a human-computer interaction unit 12, a data storage unit 13, a precise time base unit 14, a trigger unit 15, an electrical characteristic unit 16 and a dynamic characteristic unit 17 which are respectively connected with the microprocessor unit 11; the human-computer interaction unit 12 sends a parameter setting instruction to the microprocessor unit 11, the precise time base unit 14 provides a working clock for the microprocessor unit 11, the trigger unit 15 sends a trigger signal to the microprocessor unit 11 when triggered, and the data storage unit 13 is used for storing electrical characteristic parameters or dynamic characteristic parameters to be collected by the microprocessor unit 11; the microprocessor unit 11 transmits the parameters set by the human-computer interaction unit 12 to the electrical characteristic unit 16 and the dynamic characteristic unit 17, and when the microprocessor unit 11 receives a trigger signal, the electrical characteristic unit 16 and the dynamic characteristic unit 17 respectively simulate the opening and closing function of the circuit breaker and the movement of a transmission mechanism of the circuit breaker, and transmit the electrical characteristic parameters and the dynamic characteristic parameters to the microprocessor unit 11.
In the embodiment, whether the measurement of each parameter of the high-voltage circuit breaker dynamic characteristic tester is accurate or not can be detected by simulating the opening and closing function of a main fracture of the high-voltage circuit breaker, the opening and closing function of an auxiliary contact, the function simulation of the current size and the pulse width length of an opening and closing coil, the linear transmission of a motion connecting rod of the circuit breaker and the rotation transmission function of a rotating shaft.
In the above embodiment, preferably, the electrical characteristic unit 16 includes a main fracture opening and closing control component 161, an opening auxiliary contact control component 162, a closing auxiliary contact control component 163, a closing coil control component 164, and an opening coil control component 165, where the main fracture opening and closing control component 161 is configured to simulate a closing and opening function of a main port of the circuit breaker, the opening auxiliary contact control component 162 is configured to simulate a current function of the opening auxiliary contact to cut off the opening coil during opening of the circuit breaker, the closing auxiliary contact control component 163 is configured to simulate a current function of the closing auxiliary contact to cut off the closing coil during closing of the circuit breaker, the closing coil control component 164 is configured to simulate a current size and a pulse width length of the closing coil of the circuit breaker, and the opening coil control component 165 is configured to simulate a current size and a pulse width length of the opening coil of the circuit breaker.
In the above embodiment, preferably, the circuit breaker simulation apparatus is connected to the dynamic characteristic tester or the relay protection testing device of the circuit breaker to be tested through the testing interface, and receives test data of the dynamic characteristic tester or the relay protection testing device of the circuit breaker. In the above embodiment, preferably, the microprocessor unit 11 sends the collected electrical characteristic parameters and dynamic characteristic parameters and the test data received by the test interface to the human-computer interaction unit 12 for comparison and display.
Specifically, firstly, a tester can set parameters including main fracture action time, auxiliary contact action time, opening and closing coil current magnitude, pulse width, stroke, speed, angle and other parameters through a human-computer interaction interface according to needs. And secondly, connecting the dynamic characteristic tester or the relay protection test equipment of the circuit breaker to be detected with a corresponding interface of the simulation device by using a special test wire. Then, the trigger unit 15 generates a trigger signal to start timing and movement of the simulation device and the detected instrument at the same time, the simulation device outputs corresponding electrical characteristic parameters and dynamic characteristic parameters and acquires feedback data, and the detected instrument also acquires corresponding signals at the same time. And finally, the simulation device displays the acquired electrical characteristic parameters and the acquired dynamic characteristic parameters on a human-computer interaction interface in the form of graphs and lists, and compares the electrical characteristic parameters and the dynamic characteristic parameters with the test data of the detected instrument so as to verify whether the detected instrument is qualified.
Specifically, as shown in fig. 2, during the closing test for the electrical characteristics, the simulator outputs a main fracture closing waveform m1, an operation waveform f1 of the opening auxiliary contact, an operation waveform h1 of the closing auxiliary contact, and a closing coil current waveform hc 1. In the waveform of the closing coil current hc1, t2 is the pulse width length of the coil current, and the peak current i1 is the magnitude of the coil current; in the closing process, the closing auxiliary contact is switched from closed to open, and the time point t1 is the action time of the closing auxiliary contact; the opening auxiliary contact is opened to closed, and the time point t4 is the action time of the opening auxiliary contact; the main fracture is changed from an opening state to a closing state, and the time point t3 is the fracture closing time. All the time data t1, t2, t3, t4, and the current data i1 are displayed in the form of characteristic values in a data list, and can be compared with whether the instrument to be tested satisfies the design requirements.
Specifically, as shown in fig. 3, during the opening test for the electrical characteristics, the simulator outputs a main fracture opening waveform m2, an operation waveform f2 of the opening auxiliary contact, an operation waveform h2 of the closing auxiliary contact, and an opening coil current waveform hc 2. In the waveform of the opening coil current hc2, t8 is the pulse width length of the coil current, and the peak current i2 is the magnitude of the coil current; in the switching-off process, the switching-off auxiliary contact is switched from closed to open, and the time point t6 is the action variable time of the switching-off auxiliary contact; the closing auxiliary contact is opened to closed, and the time point t9 is the action time of the closing auxiliary contact; the main fracture is changed from a closing state to an opening state, and the time point t7 is the fracture closing time. All the time data t6, t7, t8, t9, and the current data i2 are displayed in the form of characteristic values in a data list, and can be compared with whether the instrument to be tested satisfies the design requirements.
In the above embodiment, preferably, the dynamic characteristic unit 17 includes an orthogonal encoder driving component 171, a linear motor driving component 172, a linear transmission mechanism 173, a magnetic scale collecting component 174, a rotary motor driving component 175, a rotary transmission mechanism 176 and a rotary encoder collecting component 177, the orthogonal encoder driving component 171 is used for simulating orthogonal encoder signals output when the main shaft of the circuit breaker rotates, the linear motor driving component 172 is used for driving the linear transmission mechanism 173 to move linearly, and for simulating the linear motion function of the transmission link of the circuit breaker, the magnetic scale acquisition component 174 is used for acquiring the operation data of the linear transmission mechanism 173, the rotary motor driving component 175 is used for driving the rotary transmission mechanism 176 to rotate, and is used for simulating the rotary motion function of the rotating shaft of the circuit breaker, and the rotary encoder acquisition component 177 is used for acquiring the operation data of the rotary transmission mechanism 176.
In the above embodiment, firstly, the staff inputs parameters such as stroke, over travel, distance to open, speed and the like required by the circuit breaker simulation device through the human-computer interaction interface. Next, the microcontroller unit of the analog device analyzes the setting data and stores the data in the data storage unit 13. Then, after the microprocessor unit 11 receives the trigger signal, the microprocessor transmits data to the corresponding interface through the corresponding component under the beat of the precise time base unit 14. Because the linear motor with large acceleration and high response speed is adopted, the stroke resolution of the dynamic characteristic can reach 0.01mm, the displacement range is 5.00 mm-1000 mm, and the precision can reach 0.01 percent, thereby meeting the inspection requirements of a dynamic characteristic tester of a high-voltage circuit breaker and the test requirements of relay protection equipment. And finally, after the data output is finished, the microprocessor displays the output waveforms and data of all the components on a human-computer interaction interface.
The utility model also provides a circuit breaker simulation method based on electric characteristic and dynamic characteristic, include: sending a parameter setting instruction to the microprocessor unit 11 through the man-machine interaction unit 12; the microprocessor unit 11 analyzes the parameter setting instruction and stores the parameter setting data in the data storage unit 13; after receiving the trigger signal transmitted by the trigger unit 15, the microprocessor unit 11 sends the parameter setting data to the electrical characteristic unit 16, the dynamic characteristic unit 17, the circuit breaker dynamic characteristic tester or the relay protection test equipment under the clock beat of the precision time base unit 14; respectively acquiring electrical characteristic parameters and dynamic characteristic parameters of the electrical characteristic unit 16 and the dynamic characteristic unit 17 and test signals of a circuit breaker dynamic characteristic tester or relay protection test equipment; and comparing the electrical characteristic parameter and the dynamic characteristic parameter with the test signal to judge whether the dynamic characteristic tester or the relay protection test equipment of the circuit breaker is qualified or not.
In the above embodiment, preferably, the electrical characteristic unit 16 includes a main fracture opening and closing control component 161, an opening auxiliary contact control component 162, a closing auxiliary contact control component 163, a closing coil control component 164, and an opening coil control component 165, where the main fracture opening and closing control component 161 is configured to simulate a closing and opening function of a main port of the circuit breaker, the opening auxiliary contact control component 162 is configured to simulate a current function of the opening auxiliary contact to cut off the opening coil during opening of the circuit breaker, the closing auxiliary contact control component 163 is configured to simulate a current function of the closing auxiliary contact to cut off the closing coil during closing of the circuit breaker, the closing coil control component 164 is configured to simulate a current size and a pulse width length of the closing coil of the circuit breaker, and the opening coil control component 165 is configured to simulate a current size and a pulse width length of the opening coil of the circuit breaker.
In the above embodiment, preferably, after the electrical characteristic unit 16 receives the parameter setting data sent by the microprocessor unit 11, the main-port switching-on/switching-off control component 161 simulates a main-port switching-on waveform or a switching-off waveform, the switching-off auxiliary contact control component 162 simulates an operation waveform of a switching-off auxiliary contact, the switching-on auxiliary contact control component 163 simulates an operation waveform of a switching-on auxiliary contact, the switching-on coil control component 164 simulates a current waveform of a switching-on coil, and the switching-off coil control component 165 simulates a current waveform of a switching-off coil.
Specifically, firstly, a tester can set parameters including the main fracture action time, the auxiliary contact action time, the opening and closing coil current magnitude, the pulse width, the stroke, the speed, the angle and other parameters through the human-computer interaction unit 12 according to needs. And secondly, connecting the dynamic characteristic tester or the relay protection test equipment of the circuit breaker to be detected with a corresponding interface of the simulation device by using a special test wire. Then, the trigger unit 15 generates a trigger signal to start timing and movement of the simulation device and the detected instrument at the same time, the simulation device outputs corresponding electrical characteristic parameters and dynamic characteristic parameters and acquires feedback data, and the detected instrument also acquires corresponding signals at the same time. Finally, the analog device displays the collected electrical characteristic parameters and dynamic characteristic parameters on the interface of the human-computer interaction unit 12 in the form of graphs and lists, and compares the electrical characteristic parameters and the dynamic characteristic parameters with the test data of the instrument to be tested, so as to verify whether the instrument to be tested is qualified.
In the above embodiment, preferably, the dynamic characteristic unit 17 includes an orthogonal encoder driving component 171, a linear motor driving component 172, a linear transmission mechanism 173, a magnetic scale collecting component 174, a rotary motor driving component 175, a rotary transmission mechanism 176 and a rotary encoder collecting component 177, the orthogonal encoder driving component 171 is used for simulating orthogonal encoder signals output when the main shaft of the circuit breaker rotates, the linear motor driving component 172 is used for driving the linear transmission mechanism 173 to move linearly, and for simulating the linear motion function of the transmission link of the circuit breaker, the magnetic scale acquisition component 174 is used for acquiring the operation data of the linear transmission mechanism 173, the rotary motor driving component 175 is used for driving the rotary transmission mechanism 176 to rotate, and is used for simulating the rotary motion function of the rotating shaft of the circuit breaker, and the rotary encoder acquisition component 177 is used for acquiring the operation data of the rotary transmission mechanism 176.
Specifically, firstly, a worker inputs parameters such as a stroke, an over travel, a distance, a speed and the like required by the circuit breaker simulation device through the interface of the human-computer interaction unit 12, and secondly, the microprocessor unit 11 of the simulation device analyzes and processes the set data and stores the data in the data storage unit 13. Then, after the microprocessor unit 11 receives the trigger signal, the microprocessor unit 11 transmits data to the corresponding interface through the corresponding components at the clock timing of the precision time base unit 14. As the linear motor with higher acceleration and high response speed is adopted, the stroke resolution of the dynamic characteristic can reach 0.01mm, the displacement range is 5.00 mm-1000 mm, and the precision can reach 0.01 percent, thereby meeting the inspection requirements of a dynamic characteristic tester of a high-voltage circuit breaker and the test requirements of relay protection equipment. Finally, after the data output is finished, the microprocessor unit 11 displays the output waveforms and data of each component on the interface of the human-computer interaction unit 12.
In the above embodiment, preferably, the microprocessor unit 11 determines the rotation direction of the encoder according to the phase difference between the orthogonal encoder signals, thereby determining whether the circuit breaker is in the closing motion or the opening motion; the microprocessor unit 11 calculates the motion data of the linear motion mechanism according to the operation data of the magnetic grid ruler acquisition assembly 174, and the microprocessor unit 11 calculates the motion data of the rotary transmission mechanism 176 according to the operation data of the rotary encoder acquisition assembly 177.
Specifically, the closing and opening movement directions of the rotating shaft of the circuit breaker can be simulated by the rotation direction of the orthogonal encoder. When the orthogonal encoder rotating shaft rotates, two orthogonal signals A, B are output, and the phase difference between the two orthogonal signals is 90 degrees. The rotational direction is determined by the phase difference between the two. In fig. 4, when the waveform of the signal a rises, the signal B is at a high level stable position, the signal a is determined to lead the signal B, and the encoder is determined to rotate clockwise, that is, the closing movement of the circuit breaker is simulated; in fig. 5, when the waveform of the signal B rises, the signal a is at a high level and is stable, the signal B is determined to lead the signal a, and the encoder is determined to rotate counterclockwise, i.e., the opening motion of the analog breaker.
The stroke size of the circuit breaker is simulated by the number N of pulses output by the encoder, the closing and opening speed of the circuit breaker is simulated by the pulse width length T of the encoder or the frequency F of the pulses, and the stroke of the circuit breaker quantized by each pulse output by the encoder is known to be L.
If the total stroke of the circuit breaker is set to be S, the switching-on and switching-off speed of the circuit breaker is V, and if the switching-on and switching-off speed of the circuit breaker is simulated by uniform linear motion, the number of pulses and the pulse frequency are calculated as follows:
number of pulses N ═ S/L (1-1)
Pulse frequency F ═ V/L (1-2)
The microprocessor unit 11 adopts a high-new performance 32-bit microprocessor STM32F429, has strong data processing capability, has a dominant frequency and a peripheral frequency both reaching 180MHz, has rich Pulse Width Modulation (PWM) interfaces, and uses two paths of PWM of the microprocessor as A, B signals output by the quadrature encoder.
The known peripheral frequency of the microprocessor is f0According to the calculated pulse frequency of (1-2)If the rate is F, the PWM frequency division coefficient K is calculated as follows:
k-f frequency division coefficient of PWM0/F (1-3)
The frequency division coefficient K loaded by the microprocessor is a number of one pulse period, and the difference between the signal A and the signal B of the orthogonal encoder is 90 degrees, then the phase difference value P is calculated as follows:
phase difference value: p is K/4 (1-4)
If the set stroke S of the circuit breaker is 200mm, the closing and opening speed V of the circuit breaker is 5m/S, the quantized stroke of each pulse of the encoder is 0.01mm, and the peripheral frequency of the microprocessor is 180 MHz.
The number of the output pulses of the encoder is 200/0.01 20000 (1-10) as N/L
Encoder output pulse frequency, F ═ V/L ═ 5/(0.01 × 0.001.001) ═ 500k Hz (1-20)
K (180 × 1000)/500 (360 (1-30)
Phase difference value: k/4 360/4 (1-40)
When the analog circuit breaker is switched on, the orthogonal encoder signal A leads the signal B by 90 degrees, the initial loading value of the pulse width modulation interface register where the signal A is located is 90, and the initial loading value of the pulse width modulation interface register where the signal B is located is 0. The stroke and velocity waveforms are output as shown at 6.
In the stroke curve p1 shown in fig. 6, at time ta, the circuit breaker simulation device starts closing movement, and at time tb, the movement ends, and the stroke value S0 is a simulated circuit breaker stroke value. In the speed course curve j1, because the speed course curve is designed to be in uniform linear motion, the speed course curve is a straight line, and the speed value v1 is the closing speed.
When the analog circuit breaker is opened, the quadrature encoder signal B leads the signal A by 90 degrees in phase difference, the initial loading value of the pulse width modulation interface register where the signal B is located is 90, and the initial loading value of the pulse width modulation interface register where the signal A is located is 0. The stroke and velocity waveforms are output as shown at 7. Since signal B leads signal A, the trip curve j2 is an inverse curve relative to the curve j1 where A leads signal B.
In the travel curve p2 shown in fig. 7, at the time tc, the opening of the circuit breaker system is simulated to start moving, and at the time td, the movement is finished, and the travel value S2 simulates the travel value of the circuit breaker. In the speed course curve j2, because the speed course curve is designed to be in uniform linear motion, the speed course curve is a straight line, and the speed value v2 simulates the opening speed of the circuit breaker.
In the above embodiments, the linear motor is a transmission device that directly converts electric energy into mechanical energy of linear motion without any intermediate conversion mechanism; the rotary motor can be seen as being formed by cutting open a rotary motor in the radial direction and expanding the rotary motor into a plane; the device has the advantages of simple structure, easy adjustment and control, high acceleration, no transverse edge effect and the like. The linear motor driving assembly 172, the linear transmission mechanism 173 and the magnetic grid ruler acquisition assembly 174 of the circuit breaker simulation device simulate the linear motion characteristic of the transmission mechanism in the switching-on and switching-off process of the circuit breaker. The linear motor driving component 172 drives the linear transmission mechanism 173 to do linear motion according to the design parameters transmitted by the microprocessor unit 11, and the magnetic grid ruler acquisition component 174 acquires the motion data of the linear transmission mechanism 173 in real time and transmits the data to the microprocessor unit 11; the microprocessor unit 11 sends the speed, the stroke waveform and the measurement data to the interface display of the human-computer interaction unit 12.
The rotating motor driving assembly 175, the rotating transmission mechanism 176 and the rotary encoder collecting assembly 177 of the circuit breaker simulating device simulate the rotating motion characteristic of a circuit breaker transmission shaft in the switching-on and switching-off process of the circuit breaker. The rotary motor driving component 175 drives the rotary transmission mechanism 176 to perform rotary motion according to the design parameters transmitted by the microprocessor unit 11, and the rotary encoder acquires the motion data of the rotary transmission mechanism 176 in real time and transmits the data to the microprocessor unit 11; finally, the microprocessor unit 11 sends the speed, the stroke waveform and the measurement data to an interface of the human-computer interaction unit 12 for display.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A circuit breaker simulation apparatus based on electrical and dynamic characteristics, comprising: the system comprises a microprocessor unit, a human-computer interaction unit, a data storage unit, a precise time base unit, a trigger unit, an electrical characteristic unit and a dynamic characteristic unit, wherein the human-computer interaction unit, the data storage unit, the precise time base unit, the trigger unit, the electrical characteristic unit and the dynamic characteristic unit are respectively connected with the microprocessor unit;
the human-computer interaction unit sends a parameter setting instruction to the microprocessor unit, the accurate time base unit provides a working clock for the microprocessor unit, the trigger unit sends a trigger signal to the microprocessor unit when being triggered, and the data storage unit is used for storing electrical characteristic parameters or dynamic characteristic parameters to be collected by the microprocessor unit;
the microprocessor unit transmits the parameters set by the human-computer interaction unit to the electrical characteristic unit and the dynamic characteristic unit, and the electrical characteristic unit and the dynamic characteristic unit respectively simulate the opening and closing functions of the circuit breaker and the movement of a circuit breaker transmission mechanism when the microprocessor unit receives the trigger signal, and transmit the electrical characteristic parameters and the dynamic characteristic parameters to the microprocessor unit.
2. The circuit breaker simulation apparatus based on electrical and dynamic characteristics of claim 1, the electrical characteristic unit comprises a main fracture opening and closing control component, an opening auxiliary contact control component, a closing coil control component and an opening coil control component, the main fracture switching-on and switching-off control assembly is used for simulating the switching-on and switching-off functions of the main port of the circuit breaker, the opening auxiliary contact control assembly is used for simulating the current function of the opening auxiliary contact for cutting off the opening coil in the opening process of the circuit breaker, the switching-on auxiliary contact control assembly is used for simulating the current function of a switching-on auxiliary contact for cutting off a switching-on coil in the switching-on process of the circuit breaker, the closing coil control assembly is used for simulating the current size and the pulse width length of a closing coil of the circuit breaker, the opening coil control assembly is used for simulating the current size and the pulse width length of the opening coil of the circuit breaker.
3. The circuit breaker simulation apparatus based on electrical characteristics and dynamic characteristics of claim 1, wherein the dynamic characteristics unit comprises a quadrature encoder driving component, a linear motor driving component, a linear transmission mechanism, a magnetic scale acquisition component, a rotary motor driving component, a rotary transmission mechanism and a rotary encoder acquisition component,
orthogonal encoder drive assembly is used for the simulation the orthogonal encoder signal of output when the main shaft of circuit breaker rotates, linear electric motor drive assembly is used for driving linear drive mechanism linear motion to and be used for simulating the linear motion function of circuit breaker transmission connecting rod, the subassembly is used for gathering are gathered to the magnetic grid chi linear drive mechanism's operating data, rotary electric motor drive assembly is used for driving rotary drive mechanism rotary motion to and be used for simulating the rotary motion function of circuit breaker pivot, rotary encoder gathers the subassembly and is used for gathering rotary drive mechanism's operating data.
4. The circuit breaker simulation device based on electrical characteristics and dynamic characteristics of claim 1, wherein the circuit breaker simulation device is connected with a circuit breaker dynamic characteristic tester to be tested or relay protection test equipment through a test interface, and receives test data of the circuit breaker dynamic characteristic tester or the relay protection test equipment.
5. The circuit breaker simulation apparatus according to claim 4, wherein the microprocessor unit sends the collected electrical characteristic parameters and the collected dynamic characteristic parameters to the human-computer interaction unit for comparison and display with the test data received by the test interface.
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| CN114839526A (en) * | 2022-07-01 | 2022-08-02 | 国网辽宁省电力有限公司 | Circuit breaker characteristic test platform |
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2019
- 2019-12-09 CN CN201922187979.9U patent/CN211180171U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114839526A (en) * | 2022-07-01 | 2022-08-02 | 国网辽宁省电力有限公司 | Circuit breaker characteristic test platform |
| CN114839526B (en) * | 2022-07-01 | 2022-09-09 | 国网辽宁省电力有限公司 | Circuit breaker characteristic test platform |
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