Calibration system and method for phase selection device of circuit breaker

Abstract

The system comprises sensor interfaces, other analog signal interfaces, an ultrahigh frequency signal interface, a command input module and a command output module, and the sensor interfaces comprise a spring pressure sensor interface, an oil pressure sensor interface, an air pressure sensor interface and a temperature sensor interface. The other analog signal interfaces comprise a fracture measurement interface, a control voltage interface, a current transformer interface and a voltage transformer interface, the output end of the analog-to-digital converter is connected to the input end of the ZYNQ controller, and the output end of the ultrahigh frequency signal interface is connected to the input end of the analog-to-digital converter; the output end of the analog-to-digital converter is connected to the input end of the ZYNQ controller, and the command input module and the command output module are respectively connected to the digital isolator; the output end of the digital isolator is connected to the input end of the ZYNQ controller, and the ZYNQ controller is connected to the SD card and the network port.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breaker control, and particularly to a calibration system and method for a circuit breaker phase selection device. Background Art

[0002] Currently, due to the lack of sufficiently effective on-site test means and methods applicable to the phase selection and closing devices of ultra-high voltage and extra-high voltage DC converter stations, there are relatively large potential hazards during the project commissioning process. During the DC system commissioning stage, AC voltage disturbances and commutation failures have occurred due to improper parameter settings of the phase selection and closing devices. Although there have been on-site commissioning studies on phase selection devices to varying degrees, for circuit breakers with phase selection devices that have been put into operation, especially those that have been in long-term static state, frequently operate, and have not had their parameters adjusted for a long time, the preset parameters of their phase selection devices are likely to deviate. There is no unified calibration standard and process for this, and there is also a lack of corresponding integrated calibration equipment for the cooperation control strategy between the phase selection device and the circuit breaker.

[0003] The information disclosed in the background art section is only used to enhance the understanding of the background of the present invention, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0004] Aiming at the deficiencies or defects existing in the above-mentioned prior art, a calibration system and method for a circuit breaker phase selection device are provided, which can simulate various circuit breaker working conditions, realize the calibration of the phase selection device and the phase selection strategy, evaluate whether the control logic of the phase selection device is reasonable, and whether there is a deviation in its control accuracy; it can realize the no-load calibration and live calibration of the linkage between the phase selection control device and the circuit breaker, and provide a comprehensive health status evaluation for the phase selection control device.

[0005] The object of the present invention is achieved through the following technical solutions.

[0006] A calibration system for a circuit breaker phase selection device includes a sensor interface, other analog signal interfaces, a UHF signal interface, a command input module, and a command output module. The sensor interface includes a spring pressure sensor interface, an oil pressure sensor interface, a gas pressure sensor interface, and a temperature sensor interface, and their output terminals are all connected to the input terminal of signal processing circuit A. The output terminal of signal processing circuit A is connected to the input terminal of an analog-to-digital converter. The other analog signal interfaces include a contact measurement interface, a control voltage interface, a current transformer interface, and a voltage transformer interface. The output terminal of the contact measurement interface is connected to signal processing circuit B, the output terminal of the control voltage interface is connected to signal processing circuit C, the output terminal of the current transformer interface is connected to signal processing circuit D, and the output terminal of the voltage transformer interface is connected to the input terminal of signal processing circuit E. The output terminals of signal processing circuit B, signal processing circuit C, signal processing circuit D, and signal processing circuit E are connected to the analog-to-digital converter. The output terminal of the analog-to-digital converter is connected to the input terminal of the ZYNQ controller. The output terminal of the UHF signal interface is connected to the input terminal of the analog-to-digital converter. The output terminal of the analog-to-digital converter is connected to the input terminal of the ZYNQ controller. The command input module and the command output module are respectively connected to a digital isolator. The output terminal of the digital isolator is connected to the input terminal of the ZYNQ controller, and the input terminal of the digital isolator is connected to the output terminal of the ZYNQ controller. The ZYNQ controller is connected to an SD card and a network port.

[0007] In the calibration system for a circuit breaker phase selection device described above, the output terminals of the sensor interface, the control voltage interface, the current transformer interface, and the voltage transformer interface can be reused as input terminals, and the input terminals are respectively connected to the output terminals of signal generation circuit A, signal generation circuit C, signal generation circuit D, and signal generation circuit E. The input terminals of signal generation circuit A, signal generation circuit C, signal generation circuit D, and signal generation circuit E are connected to the output terminal of a digital-to-analog converter. The input terminal of the digital-to-analog converter is connected to the output terminal of the ZYNQ controller.

[0008] In the calibration system for a circuit breaker phase selection device described above, signal processing circuit A, signal generation circuit A, and signal processing circuit B are composed of an isolated operational amplifier and a precision operational amplifier to achieve isolation and amplification of signals.

[0009] In the calibration system for a circuit breaker phase selection device described above, signal processing circuit C is composed of a voltage-dividing resistor, an isolated operational amplifier, and a precision operational amplifier to achieve sampling, isolation, and amplification of large voltage signals.

[0010] In the calibration system for a circuit breaker phase selection device described above, signal processing circuit D is composed of a sampling resistor, an isolated operational amplifier, and a precision operational amplifier to achieve sampling, isolation, and amplification of large current signals.

[0011] In the described calibration system for a breaker phase selection device, the signal processing circuit E consists of a voltage transformer, an isolation operational amplifier, and a precision operational amplifier, and realizes the sampling, isolation, and amplification of large AC voltage signals.

[0012] In the described calibration system for a breaker phase selection device, the signal generation circuit C consists of an isolation operational amplifier, a precision operational amplifier, and a high-voltage signal generator. The high-voltage signal generator can generate a DC signal with a maximum of 250V, which is used to simulate the control voltage.

[0013] In the described calibration system for a breaker phase selection device, the signal generation circuit D consists of an isolation operational amplifier and a precision operational amplifier, and the generated voltage signal is used to simulate the current signal on the secondary side of the current transformer.

[0014] In the described calibration system for a breaker phase selection device, the signal generation circuit E consists of an isolation operational amplifier, a precision operational amplifier, and a high-voltage generator, and realizes the output of an AC signal with an amplitude of 120V to simulate the signal of the voltage transformer.

[0015] A layout method for a calibration system for a breaker phase selection device includes

[0016] The voltage transformer interface and the current transformer interface are connected to the corresponding transformer interfaces of the phase selection device through an SF10 aviation plug, and the above signal waveforms are collected.

[0017] Connect the sensor interface of the calibration device to the corresponding sensor interface of the phase selection device through an SF12-4 aviation plug.

[0018] The command input interface and the command output interface are respectively connected to the command output interface and the command input interface of the phase selection device.

[0019] Based on the calibration system for the breaker phase selection device, signals are triggered, collected, stored, and transmitted.

[0020] Compared with the prior art, the beneficial effects brought by the present invention are:

[0021] The present invention provides a stable calibration system for a circuit breaker phase selection device, which collects sensor data such as spring pressure, oil pressure, air pressure, and temperature, and also has a contact measurement interface, a control voltage measurement interface, a current transformer interface, and a voltage transformer interface. Among them, the secondary side signals of the voltage and current transformers are key reference signals for circuit breaker phase selection control. Spring pressure, oil pressure, air pressure, temperature, and control voltage are important influencing factors for the opening and closing action times of the circuit breaker. The contact signal indicates the actual closing / opening point of the circuit breaker. By collecting and monitoring the above parameters, it provides a basis for the calibration device to evaluate the health status of the circuit breaker phase selection device. The sensor interface, the control voltage interface, the current transformer interface, and the voltage transformer interface have an interface multiplexing function, that is, the interface can be used as both an input end and an output end. When the interface is used as an input end, it collects sensor signals, control voltage, and transformer signals; when the interface is used as an output end, it simulates sensor signals, control voltage, and transformer signals and outputs them to the phase selection device to simulate various circuit breaker conditions, and at the same time, it recollects the simulated sensor signals, control voltage, and transformer signals to further improve the evaluation accuracy.

[0022] The above description is only an overview of the technical solution of the present invention. In order to make the technical means of the present invention clearer and to the extent that those skilled in the art can implement it according to the content of the description, and in order to make the above and other purposes, features, and advantages of the present invention more obvious and understandable, the following will illustrate with specific embodiments of the present invention. Brief Description of the Drawings

[0023] By reading the detailed description of the preferred specific embodiments below, various other advantages and benefits of the present invention will become clear to those of ordinary skill in the art. The drawings in the specification are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Moreover, throughout the drawings, the same reference numerals are used to represent the same components.

[0024] In the drawings:

[0025] Figure 1 is the composition structure diagram of the system shown in the embodiment of the present invention;

[0026] Figure 2 is the high-voltage generator circuit topology diagram of the system shown in the embodiment of the present invention;

[0027] Figure 3 is the layout diagram of the system for calibrating the performance and control strategy of the intelligent phase selection device shown in the embodiment of the present invention;

[0028] Figure 4 It is the layout diagram of the system shown in the embodiments of the present invention for the no-load linkage verification of the intelligent phase selection device and the circuit breaker;

[0029] Figure 5 It is the layout diagram of the system shown in the embodiments of the present invention for the live linkage verification of the intelligent phase selection device and the circuit breaker;

[0030] Wherein: 11 - Spring pressure sensor interface; 12 - Oil pressure sensor interface; 13 - Air pressure sensor interface; 14 - Temperature sensor interface; 15 - Contact measurement interface; 16 - Control voltage interface; 17 - Current transformer interface; 18 - Voltage transformer interface; 19 - UHF signal interface; 110 - Signal processing circuit A; 111 - Signal generation circuit A; 112 - Signal processing circuit B; 113 - Signal processing circuit C; 114 - Signal generation circuit C; 115 - Signal processing circuit D; 116 - Signal generation circuit D; 117 - Signal processing circuit E; 118 - Signal generation circuit E; 119 - Analog-to-digital converter (AD7606); 120 - Digital-to-analog converter; 121 - Analog-to-digital converter (AD9481); 122 - ZYNQ controller; 123 - Digital isolator; 124 - SD card; 125 - Network interface; 126 - Command input module; 127 - Command output module.

[0031] The following further explains the present invention in conjunction with the drawings and embodiments. Specific Embodiments

[0032] The specific embodiments of the present invention will be described in more detail below with reference to the drawings. Although the specific embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0033] It should be noted that certain terms are used in the description and claims to refer to specific components. Those skilled in the art should understand that technicians may use different terms to refer to the same component. The description and claims of this specification do not use the difference in terms as a way to distinguish components, but use the difference in the functions of components as the criterion for distinction. As used throughout the description and claims, the term "comprising" or "including" is an open-ended term and should be interpreted as "including but not limited to". The subsequent description of the specification is for the purpose of describing the preferred embodiments of implementing the present invention, but the description is based on the general principles of the specification and is not intended to limit the scope of the present invention. The scope of protection of the present invention shall be determined by the scope defined by the appended claims.

[0034] For the convenience of understanding the embodiments of the present invention, the following will further explain with several specific embodiments in conjunction with the accompanying drawings, and the accompanying drawings do not constitute a limitation to the embodiments of the present invention.

[0035] For better understanding, as Figures 1 to 5 shown, a calibration system for a breaker phase selection device includes a sensor interface, other analog signal interfaces, a UHF signal interface 19, a command input module 126, and a command output module 127. The sensor interface includes a spring pressure sensor interface 11, an oil pressure sensor interface 12, a gas pressure sensor interface 13, and a temperature sensor interface 14, and their output ends are all connected to the input end of a signal processing circuit A110; the output end of the signal processing circuit A110 is connected to the input end of an analog-to-digital converter 119. The other analog signal interfaces include a contact measurement interface 15, a control voltage interface 16, a current transformer interface 17, and a voltage transformer interface 18. The output end of the contact measurement interface 15 is connected to a signal processing circuit B112, the output end of the control voltage interface 16 is connected to a signal processing circuit C113, the output end of the current transformer interface 17 is connected to a signal processing circuit D115, and the output end of the voltage transformer interface 18 is connected to the input end of a signal processing circuit E117. The output ends of the signal processing circuit B112, the signal processing circuit C113, the signal processing circuit D115, and the signal processing circuit E117 are connected to the analog-to-digital converter 119. The output end of the analog-to-digital converter 119 is connected to the input end of a ZYNQ controller 122. The output end of the UHF signal interface 19 is connected to the input end of an analog-to-digital converter 121; the output end of the analog-to-digital converter 121 is connected to the input end of the ZYNQ controller 122. The command input module 126 and the command output module 127 are respectively connected to a digital isolator 123; the output end of the digital isolator 123 is connected to the input end of the ZYNQ controller 122, the input end of the digital isolator 123 is connected to the output end of the ZYNQ controller 122, and the ZYNQ controller 122 is connected to an SD card 124 and a network interface 125.

[0036] In a preferred embodiment of the calibration system for a breaker phase selection device described above, the output ends of the sensor interface, the control voltage interface 16, the current transformer interface 17, and the voltage transformer interface 18 can be reused as input ends, and the input ends are respectively connected to the output ends of a signal generation circuit A111, a signal generation circuit C114, a signal generation circuit D116, and a signal generation circuit E118; the input ends of the signal generation circuit A111, the signal generation circuit C114, the signal generation circuit D116, and the signal generation circuit E118 are connected to the output end of a digital-to-analog converter 120; the input end of the digital-to-analog converter 120 is connected to the output end of the ZYNQ controller 122.

[0037] In a preferred embodiment of the calibration system for the breaker phase selection device described above, the signal processing circuit A110, the signal generation circuit A111, and the signal processing circuit B112 are composed of an isolated operational amplifier and a precision operational amplifier to achieve isolation and amplification of signals.

[0038] In a preferred embodiment of the calibration system for the breaker phase selection device described above, the signal processing circuit C113 is composed of voltage-dividing resistors, an isolated operational amplifier, and a precision operational amplifier to achieve sampling, isolation, and amplification of large voltage signals.

[0039] In a preferred embodiment of the calibration system for the breaker phase selection device described above, the signal processing circuit D115 is composed of sampling resistors, an isolated operational amplifier, and a precision operational amplifier to achieve sampling, isolation, and amplification of large current signals.

[0040] In a preferred embodiment of the calibration system for the breaker phase selection device described above, the signal processing circuit E117 is composed of a voltage transformer, an isolated operational amplifier, and a precision operational amplifier to achieve sampling, isolation, and amplification of large AC voltage signals.

[0041] In a preferred embodiment of the calibration system for the breaker phase selection device described above, the signal generation circuit C114 is composed of an isolated operational amplifier, a precision operational amplifier, and a high-voltage signal generator. The high-voltage signal generator can generate a DC signal of up to 250V for controlling voltage simulation.

[0042] In a preferred embodiment of the calibration system for the breaker phase selection device described above, the signal generation circuit D116 is composed of an isolated operational amplifier and a precision operational amplifier. The generated voltage signal is used to simulate the current signal on the secondary side of the current transformer.

[0043] In a preferred embodiment of the calibration system for the breaker phase selection device described above, the signal generation circuit E118 is composed of an isolated operational amplifier, a precision operational amplifier, and a high-voltage generator to achieve the output of an AC signal with an amplitude of 120V for simulating the signal of the voltage transformer.

[0044] A layout method for the calibration system for the breaker phase selection device includes,

[0045] The voltage transformer interface and the current transformer interface are connected to the corresponding transformer interfaces of the phase selection device through SF10 aviation plugs and the above signal waveforms are retrieved.

[0046] Connect the sensor interface of the calibration device to the corresponding sensor interface of the phase selection device through an SF12-4 aviation plug.

[0047] The command input interface and the command output interface are respectively connected to the command output interface and the command input interface of the phase selection device;

[0048] Based on the verification system for the circuit breaker phase selection device, signals are triggered, collected, stored, and transmitted.

[0049] In one embodiment, referring to Figure 1 , an embodiment of the present invention discloses a verification system for a circuit breaker phase selection device, including a spring pressure sensor interface 11; an oil pressure sensor interface 12; a gas pressure sensor interface 13; a temperature sensor interface 14; a contact measurement interface 15; a control voltage interface 16; a current transformer interface 17; a voltage transformer interface 18; a UHF signal interface 19; a signal processing circuit A110; a signal generation circuit A111; a signal processing circuit B112; a signal processing circuit C113; a signal generation circuit C114; a signal processing circuit D115; a signal generation circuit D116; a signal processing circuit E117; a signal generation circuit E118; an analog-to-digital converter 119; a digital-to-analog converter 120; an analog-to-digital converter 121; a ZYNQ controller 122; a digital isolator 123; an SD card 124; a network interface 125; a command input module 126; a command output module 127.

[0050] The embodiment of the present invention includes a sensor interface, other analog signal interfaces, and a UHF signal interface 19. The sensor interface includes a spring pressure sensor interface 11, an oil pressure sensor interface 12, a gas pressure sensor interface 13, and a temperature sensor interface 14, and their output ends are all connected to the input end of the corresponding signal processing circuit A110; the output end of the signal processing circuit A110 is connected to the input end of the analog-to-digital converter 119. The other analog signal interfaces include a contact measurement interface 15, a control voltage interface 16, a current transformer interface 17, and a voltage transformer interface 18, and their output ends are respectively connected to the input ends of the signal processing circuit B112, the signal processing circuit C113, the signal processing circuit D115, and the signal processing circuit E117; the output ends of the signal processing circuits B, C, D, and E are connected to the analog-to-digital converter 119. The output end of the analog-to-digital converter 119 is connected to the input end of the ZYNQ controller 122. The output end of the UHF signal interface 19 is connected to the input end of the analog-to-digital converter 121; the output end of the analog-to-digital converter 121 is connected to the input end of the ZYNQ controller 122.

[0051] Further, in the embodiment of the present invention, it includes a command input module 126 and a command output module 127. The command input module 126 and the command output module 127 are respectively connected to a digital isolator 123; the output end and the input end of the digital isolator 123 are respectively connected to the input end and the output end of a ZYNQ controller 122; the ZYNQ controller 122 is connected to an SD card 114 and a network interface 115.

[0052] Further, in the embodiment of the present invention, the sensor interface, the control voltage interface 16, the current transformer interface 17, and the voltage transformer interface 18 have an interface multiplexing function, that is, the output end of the interface can be multiplexed as the input end. The input ends of the interfaces are respectively connected to the output ends of a signal generation circuit A111, a signal generation circuit C114, a signal generation circuit D116, and a signal generation circuit E118; the input ends of the signal generation circuits A, C, D, and E are connected to the output end of a digital-to-analog converter 120; the input end of the digital-to-analog converter 120 is connected to the output end of the ZYNQ controller 122.

[0053] Further, in the embodiment of the present invention, the signal processing circuit A110, the signal generation circuit A111, and the signal processing circuit B112 are composed of an isolated operational amplifier and a precision operational amplifier.

[0054] Further, in the embodiment of the present invention, the signal processing circuit C113 is composed of a voltage-dividing resistor, an isolated operational amplifier, and a precision operational amplifier. Since the rated control voltage is 220V, the control voltage is divided by the voltage-dividing resistor to obtain a DC voltage signal below 5V, and then isolation and amplification are performed.

[0055] Further, in the embodiment of the present invention, the signal processing circuit D115 is composed of a sampling resistor, an isolated operational amplifier, and a precision operational amplifier. The current signal on the secondary side of the current transformer is converted into a DC voltage signal below 5V through the sampling resistor, and then isolation and amplification are performed.

[0056] Further, in the embodiment of the present invention, the signal processing circuit E117 is composed of a micro voltage transformer, an isolated operational amplifier, and a precision operational amplifier. By setting the turns ratio of the micro voltage transformer, the primary side voltage and the secondary side voltage are adjusted to 30:1, and the voltage signal of the voltage transformer is converted into an AC voltage signal with an amplitude below 5V, and then isolation and amplification are performed.

[0057] Further, in the embodiment of the present invention, the signal generation circuit E118 is composed of an isolated operational amplifier, a precision operational amplifier, and a high-voltage signal generator. See Figure 2, The high-voltage signal generator consists of an operational amplifier, a transistor amplifier circuit, and a negative feedback channel. Here, VIN is the output signal of this circuit, that is, the output of the digital-to-analog converter; R 1 to R 11 are resistors; D 1 , D 2 are diodes; C 1 , C 2 are capacitors; A 1 is an operational amplifier; T 1 , T 4 are PNP-type transistors; T 2 , T 3 are NPN-type transistors; VCC is the positive power supply; VEE is the negative power supply; VOUT is the output signal of this circuit. The input signal VIN is input to the non-inverting input terminal of the operational amplifier A 1 through R 1 . The inverting input terminal is grounded through R 3 , and the output of the operational amplifier is connected to the transistor amplifier circuit. The transistor amplifier circuit consists of R 4 to R 11 , T 1 to T 4 , D 1 , D 2 . The signal is divided and biased by R 4 , R 6 , R 8 , R 10 and then input to the bases of T 1 , T 2 . The emitter of T 1 is connected to VCC through R 5 . The collector passes through D 1 , D 2 to the collector of T 2 . The emitter of T 2 is connected to VEE through R 11 . At the same time, the collector of T 1 is connected to the base of T 3 . The collector of T 2 is connected to the base of T 4 . The collectors of T 3 and T 4 are directly connected to VCC and VEE respectively. The emitters of T 3 and T 4 are connected through R 7 , R 8 . The output VOUT is taken between R 7 , R 8 . The negative feedback channel consists of C 1 , R 2 . The signal is taken from VOUT and passes through C1 , R 2 Feedback to A 1 The high-voltage signal generation circuit has a small overall size and high integration. The adaptation and verification system should be portable and deployable on-site. The signal quality is high, and a variety of negative feedback controls such as DC, AC and digital can be used to further improve its accuracy. It can output an AC voltage with an amplitude of 120V and a bandwidth of up to 11kHz, which is used to simulate the voltage signal on the secondary side of the voltage transformer.

[0058] Furthermore, in the embodiment of the present invention, the signal generating circuit C114 is composed of an isolated operational amplifier, a precision operational amplifier, and a high-voltage signal generator. Figure 2 Similarly, the maximum output voltage is 250V DC, which can be used to simulate the control voltage signal of the circuit breaker.

[0059] Furthermore, in an embodiment of the present invention, the signal generating circuit D116 is composed of an isolated operational amplifier and a precision operational amplifier, and the generated voltage signal is used to simulate the current signal on the secondary side of the current transformer.

[0060] The specific application of the device disclosed in the embodiment of the present invention includes the following steps:

[0061] Install the device disclosed in the embodiment of the present invention;

[0062] Signal triggering, acquisition, storage and transmission.

[0063] Furthermore, the device disclosed in the embodiment of the present invention is installed in three optional ways;

[0064] Optional, see Figure 3 , connect the voltage transformer interface and the current transformer interface of the verification device disclosed in the embodiment of the present invention to the transformer interface corresponding to the phase selection device through the SF10 aviation plug, and collect the above-mentioned signal waveform; connect the sensor interface of the verification device to the sensor interface corresponding to the phase selection device through the SF12-4 aviation plug; the command input interface and the command output interface are respectively connected to the command output interface and the command input interface of the phase selection device.

[0065] Optional, see Figure 4, connect the voltage transformer interface and current transformer interface of the calibration device disclosed in the embodiments of the present invention to the corresponding transformer interfaces of the phase selection device through SF10 aviation plugs, and sample back the above signal waveforms; connect the sensor interfaces of the calibration device and the sensor interfaces of the phase selection device to the sensor signal acquisition board through SF12-4 aviation plugs, and the sensor signal acquisition board is connected to each sensor of the circuit breaker; connect the disconnection measurement interface of the calibration device to the disconnection of the circuit breaker; connect the command output interface of the calibration device to the command input interface of the phase selection device; connect the command output interface of the phase selection device to the command input interface of the calibration device and the command input interface of the circuit breaker respectively.

[0066] Optionally, refer to Figure 5 , connect the voltage transformer interface and current transformer interface of the calibration device disclosed in the embodiments of the present invention to the secondary side of the voltage transformer and the secondary side of the current transformer through SF10 aviation plugs respectively, and the primary sides of the voltage transformer and the current transformer are both connected to the high-voltage bus; connect the sensor interfaces of the calibration device and the sensor interfaces of the phase selection device to each sensor of the circuit breaker through SF12-4 aviation plugs; connect the disconnection measurement interface of the calibration device to the disconnection of the circuit breaker; connect the command output interface of the calibration device to the command input interface of the phase selection device; connect the command output interface of the phase selection device to the command input interface of the calibration device and the command input interface of the circuit breaker respectively.

[0067] In a specific embodiment of this device, the system can trigger sampling through all analog channels. The sampling data can be traced back 10,000 sampling points before the starting point. The cache space has a 2MB space. After sampling is completed, it can be uploaded through the communication interface. The calibration system can simulate various circuit breaker conditions, realize the calibration of the phase selection device and the phase selection strategy, evaluate whether the control logic of the phase selection device is reasonable, and whether there is a deviation in its control accuracy; it can realize the no-load calibration and live calibration of the linkage between the phase selection control device and the circuit breaker, and provide a comprehensive health status evaluation for the phase selection control device.

[0068] The basic principles of the present application have been described above in combination with specific embodiments. However, it should be noted that the advantages, advantages, effects, etc. mentioned in the present application are only examples and not limitations. It cannot be considered that these advantages, advantages, effects, etc. are essential for each embodiment of the present application. In addition, the above-disclosed specific details are only for the purpose of illustration and easy understanding, rather than limitations. The above details do not limit the present application to necessarily adopt the above specific details to implement.

[0069] The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the form disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize some of their variations, modifications, alterations, additions, and sub-combinations.

Claims

1. A verification system for a circuit breaker phase selection device, characterized in that: It comprises a sensor interface, other analog signal interfaces, an ultra-high frequency signal interface (19), a command input module (126) and a command output module (127). The sensor interfaces comprise a spring pressure sensor interface (11), an oil pressure sensor interface (12), an air pressure sensor interface (13) and a temperature sensor interface (14), and their output ends are all connected to the input end of a signal processing circuit A (110); the output end of the signal processing circuit A (110) is connected to the input end of an analog-to-digital converter (119); the other analog signal interfaces comprise a fault measurement interface (15), a control voltage interface (16), a current transformer interface (17) and a voltage transformer interface (18); the output end of the fault measurement interface (15) is connected to a signal processing circuit B (112), the output end of the control voltage interface (16) is connected to a signal processing circuit C (113), the output end of the current transformer interface (17) is connected to a signal processing circuit D (115), and the output end of the voltage transformer interface (18) is connected to a signal processing circuit D (115). The output ends of the signal processing circuit B (112), the signal processing circuit C (113), the signal processing circuit D (115), and the signal processing circuit E (117) are connected to an analog-to-digital converter (119); the output end of the analog-to-digital converter (119) is connected to an input end of a ZYNQ controller (122); the output end of the ultra-high frequency signal interface (19) is connected to an input end of the analog-to-digital converter (121); the output end of the analog-to-digital converter (121) is connected to an input end of the ZYNQ controller (122); the command input module (126) and the command output module (127) are respectively connected to a digital isolator (123); the output end of the digital isolator (123) is connected to an input end of the ZYNQ controller (122); the input end of the digital isolator (123) is connected to an output end of the ZYNQ controller (122); and the ZYNQ controller (122) is connected to an SD card (124) and a network port (125).

2. A verification system for a circuit breaker phase selection device according to claim 1, characterized in that: Preferably, the output ends of the sensor interface, the control voltage interface (16), the current transformer interface (17) and the voltage transformer interface (18) can be reused as input ends, and the input ends are respectively connected to the output ends of the signal generating circuit A (111), the signal generating circuit C (114), the signal generating circuit D (116) and the signal generating circuit E (118); the input ends of the signal generating circuit A (111), the signal generating circuit C (114), the signal generating circuit D (116) and the signal generating circuit E (118) are connected to the output end of the digital-to-analog converter (120); and the input end of the digital-to-analog converter (120) is connected to the output end of the ZYNQ controller (122).

3. A verification system for a circuit breaker phase selection device according to claim 1, characterized in that: The signal processing circuit A (110), the signal generating circuit A (111), and the signal processing circuit B (112) are composed of an isolation operational amplifier and a precision operational amplifier to achieve signal isolation and amplification.

4. A verification system for a circuit breaker phase selection device according to claim 1, characterized in that: The signal processing circuit C (113) is composed of a voltage divider resistor, an isolation operational amplifier and a precision operational amplifier, and realizes sampling, isolation and amplification of large voltage signals.

5. A verification system for a circuit breaker phase selection device according to claim 1, characterized in that: The signal processing circuit D (115) is composed of a sampling resistor, an isolation operational amplifier and a precision operational amplifier, and realizes sampling, isolation and amplification of large current signals.

6. A verification system for a circuit breaker phase selection device according to claim 1, characterized in that: The signal processing circuit E (117) is composed of a voltage transformer, an isolation operational amplifier, and a precision operational amplifier, and realizes sampling, isolation, and amplification of AC high voltage signals.

7. A verification system for a circuit breaker phase selection device according to claim 1, characterized in that: The signal generating circuit C (114) is composed of an isolated operational amplifier, a precision operational amplifier and a high-voltage signal generator. The high-voltage signal generator can generate a maximum DC signal of 250V for simulating the control voltage.

8. A verification system for a circuit breaker phase selection device according to claim 1, characterized in that: The signal generating circuit D (116) is composed of an isolated operational amplifier and a precision operational amplifier, and the generated voltage signal is used to simulate the current signal on the secondary side of the current transformer.

9. A verification system for a circuit breaker phase selection device according to claim 1, characterized in that: The signal generating circuit E (118) is composed of an isolated operational amplifier, a precision operational amplifier and a high voltage generator, and can output an AC signal with an amplitude of 120V, thereby simulating a voltage transformer signal.

10. A method for arranging a verification system for a circuit breaker phase selection device according to any one of claims 1 to 9.

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