CN215219134U - High-voltage nuclear phase instrument calibrating device - Google Patents

Abstract

The utility model discloses a high-voltage nuclear phase instrument calibration device, which comprises a VFD keyboard and two detection channels; each path of detection channel comprises a program-controlled standard voltage source, a power amplifier and a self-boosting standard voltage transformer; the output end of the VFD keyboard is respectively connected with the program-controlled standard power supply in each road detection channel, and is used for quickly inputting set parameters through a digital keyboard and automatically transmitting the set parameters to the program-controlled standard voltage supply; in each detection channel, the output end of the program-controlled standard power supply is connected with a self-boosting standard voltage transformer through a power amplifier, the output end of the self-boosting standard voltage transformer is connected with a high-voltage nuclear phase instrument to be detected, and the output end of the self-boosting standard voltage transformer is further connected with the feedback input end of the program-controlled standard voltage source. The utility model provides a calibrating device can effectively promote the work efficiency of high pressure nuclear phase appearance calibration.

Description

High-voltage nuclear phase instrument calibrating device

Technical Field

The utility model relates to a high pressure nuclear phase appearance especially relates to a high pressure nuclear phase appearance calibrating device.

Background

The phase sequence inversion of the power supply occurs during the switching of the power supply, which damages electrical and mechanical equipment and is important for systems requiring the parallel operation of the power supply. The high-voltage phase detector enables the high-voltage phase detection work which is dangerous and indispensable to become safe and reliable, the indication is visual and clear, and the high-voltage phase detector is convenient to carry and is an indispensable tool for high-voltage electricians.

The high-voltage phase detector is an important guarantee tool for monitoring the normal operation of a power grid, so that the regular metering and detecting work of the high-voltage phase detector is particularly important. The existing detection means for the high-voltage nuclear phase instrument is to use a voltage regulator, a booster, a high-voltage standard mutual inductor, a digital voltmeter, a phase meter, a lead and other electric elements to combine and wire connection for detection; during calibration, the voltage regulator, the booster, the high-voltage standard mutual inductor, the digital voltmeter and the phase meter are required to be connected one by one, and different voltage angles are required to be obtained by a plurality of voltage regulators in a phase vector superposition mode when other phase sequences are detected.

The existing high-voltage phase checking instrument has the defects of complex wiring, complex operation and use, insufficient accurate value of output voltage, incapability of continuously adjusting the phase position by only 15 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees, 180 degrees and the like, particularly phase angle transformation is carried out, a new test can be carried out after the wiring is required to be adjusted every time, the detection of one high-voltage phase checking instrument can be completed by repeatedly adjusting the measurement connecting wire for many times, the measurement and detection working efficiency is seriously influenced, and the detection of each phase checking instrument can be completed by more than 1 hour. With the increase of the use number of the high-voltage phase detector in recent years, particularly the level of 6-10 kV, the original calibration mode can not completely meet the requirement of the high-voltage phase detector on measuring and calibrating capacity.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's is not enough, provides a high pressure nuclear phase appearance calibrating device, has effectively improved the work efficiency of high pressure nuclear phase appearance calibration.

The purpose of the utility model is realized through the following technical scheme: a high-voltage phase checking instrument calibration device comprises a VFD keyboard and two detection channels; each path of detection channel comprises a program-controlled standard voltage source, a power amplifier and a self-boosting standard voltage transformer;

the output end of the VFD keyboard is respectively connected with the program-controlled standard power supply in each road detection channel, and is used for quickly inputting set parameters through a digital keyboard and automatically transmitting the set parameters to the program-controlled standard voltage supply;

in each detection channel, the output end of the program-controlled standard power supply is connected with a self-boosting standard voltage transformer through a power amplifier, the output end of the self-boosting standard voltage transformer is connected with a high-voltage nuclear phase instrument to be detected, and the output end of the self-boosting standard voltage transformer is further connected with the feedback input end of the program-controlled standard voltage source.

Preferably, the calibration apparatus further includes a linear power supply, and the linear power supply is respectively connected to the power amplifiers in each of the detection channels. The linear power supply adopts a ring transformer step-down rectification technology to provide a pure power supply for the power amplifier, and digital signal interference introduced by the digital power supply to the power amplifier is avoided.

Preferably, the program-controlled standard power supply comprises a digital signal source and a PID regulating circuit;

the PID regulating circuit is used for comparing the signal generated by the digital signal source with a standard voltage feedback signal generated by a self-boosting standard transformer and automatically correcting the signal;

the digital signal source comprises an ARM micro-control processor and a synchronous processing module; the synchronous processing module comprises a CPLD chip and a DAC module; the input end of the ARM micro-control processor is connected with the VFD keyboard, the output end of the ARM micro-control processor is connected with the signal input end of the PID adjusting circuit sequentially through the CPLD chip and the DAC module, the feedback input end of the PID adjusting circuit is connected with the output end of the self-boosting standard voltage transformer, and the output end of the PID adjusting circuit is connected with the power amplifier.

Preferably, the synchronous processing modules of the digital signal sources in the two detection channels are connected through a synchronous signal line, so that signal synchronization between the two detection channels is ensured.

The utility model has the advantages that: (1) the utility model realizes the continuous adjustment of the output standard voltage, and solves the problems of inaccurate voltage adjustment and slow output of the voltage regulator;

(2) the utility model discloses a standard angle is adjustable in succession between double-phase, has solved the contained angle that adopts the inherent angle phase vector of electric wire netting to come to obtain in the past and can not realize the problem of adjustable phase angle in succession.

(3) The utility model discloses a digit keyboard and VFD keyboard human-computer interaction automatic control output signal have solved the manual regulation pressure regulating and can not set for the output value problem fast.

(4) The utility model discloses a macrocyclic automatic feedback control technique for can be fast accurate output double-phase standard voltage, the phase signal of setting for.

(5) The utility model discloses a standard programme-controlled standard voltage source, integral type reduce voltage regulator, booster, high-pressure standard mutual-inductor, digital voltmeter head, the loaded down with trivial details of the wiring of phase meter from boosting standard mutual-inductor technique in the past.

Drawings

FIG. 1 is a schematic block diagram of the system of the present invention;

FIG. 2 is a functional block diagram of a programmable standard power supply;

fig. 3 is a schematic view of the working principle of the present invention.

Detailed Description

The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.

As shown in fig. 1, a calibration device for a high-voltage phase detector comprises a VFD keyboard and two detection channels; each path of detection channel comprises a program-controlled standard voltage source, a power amplifier and a self-boosting standard voltage transformer;

the output end of the VFD keyboard is respectively connected with the program-controlled standard power supply in each road detection channel, and is used for quickly inputting set parameters through a digital keyboard and automatically transmitting the set parameters to the program-controlled standard voltage supply;

in each detection channel, the output end of the program-controlled standard power supply is connected with a self-boosting standard voltage transformer through a power amplifier, the output end of the self-boosting standard voltage transformer is connected with a high-voltage nuclear phase instrument to be detected, and the output end of the self-boosting standard voltage transformer is further connected with the feedback input end of the program-controlled standard voltage source.

In fig. 1, one of the detection channels is used as an a-phase input of the high-voltage phase detector, the device is an a-phase device, the other channel is used as a C-phase input of the high-voltage phase detector, and the device is a C-phase device.

In an embodiment of the present application, the calibration apparatus further includes a linear power supply, and the linear power supply is respectively connected to the power amplifiers in each of the detection channels. The linear power supply adopts a ring transformer step-down rectification technology to provide a pure power supply for the power amplifier, and digital signal interference introduced by the digital power supply to the power amplifier is avoided.

In an embodiment of the present application, the programmable standard power supply includes a digital signal source and a PID adjusting circuit;

the PID regulating circuit is used for comparing the signal generated by the digital signal source with a standard voltage feedback signal generated by a self-boosting standard transformer and automatically correcting the signal;

as shown in fig. 2, the digital signal source includes an ARM micro-controller and a synchronous processing module; the synchronous processing module comprises a CPLD chip and a DAC module; the input end of the ARM micro-control processor is connected with the VFD keyboard, the output end of the ARM micro-control processor is connected with the signal input end of the PID adjusting circuit sequentially through the CPLD chip and the DAC module, the feedback input end of the PID adjusting circuit is connected with the output end of the self-boosting standard voltage transformer, and the output end of the PID adjusting circuit is connected with the power amplifier.

In the embodiment of the application, the synchronous processing modules of the digital signal sources in the two detection channels are connected through a synchronous signal line, and the synchronous signal line ensures and realizes the accurate synchronization of the two signals;

in the embodiment of the application, the power amplifier adopts a combined device of the class A amplifier and the class B amplifier, which depends on the bias current and the output level, of the class AB power amplifier technology, so that the working intervals of two transistors working in a push-pull working mode can be mutually covered, and the defects of the class A amplifier and the class B amplifier are overcome. The AB type power amplifier belongs to a linear power amplifier, plays a role in inhibiting even harmonic waves and ensures that an output sine power signal obtains a very low distortion value;

in the embodiment of the application, the self-boosting standard voltage transformer is used as a voltage transformer calibration standard in the error test of the transformer. The standard transformer body of the self-boosting standard voltage transformer is connected with the booster body through the inside of the electric connecting conductor; the voltage boosting and voltage checking standard is integrated. Compact structure, small volume, simple wiring and operation.

The working principle of the utility model is as shown in figure 3: the user sets the voltage and phase parameters to be output and measured through the VFD keyboard, and after the parameters are confirmed, the VFD keyboard transmits the parameters set by the user to the program-controlled standard voltage source; a digital signal source of the program-controlled voltage source generates two-phase standard sinusoidal voltage signals according to user setting and transmits the two-phase standard sinusoidal voltage signals to the PID regulating circuit; the PID regulating circuit performs proportional, integral and differential processing on the standard sinusoidal voltage signal and the standard voltage feedback signal and then transmits the processed signals to the power amplifier; the power amplifier amplifies the weak signal to a self-boosting standard voltage transformer by adopting a linear power amplification technology; the self-boosting standard voltage transformer further boosts a voltage signal to 10kV high voltage and transmits the voltage signal to the high-voltage nuclear phase instrument, and meanwhile, a standard voltage feedback signal is returned to the PID regulating circuit for precise correction, so that large loop feedback control of precise voltage is realized, and the output voltage is ensured to be consistent with the voltage set by a user; and the staff records the detection voltage amplitude and the phase parameters of the high-voltage phase checking instrument, and compares the detection voltage amplitude and the phase parameters with the parameters set by the user to realize the error calibration of the high-voltage phase checking instrument. Specifically, the worker performs the calibration in the following manner:

equation 1: voltage measurement error = ((measured value-set value) ÷ set value) + correction value

Equation 2: phase measurement error = (measured value-set value) + correction value

Measured value: the result is the electrical parameter actually measured by the high-voltage nuclear phase instrument.

Setting value: the user sets the value of the electric parameter to be output through the VFD keyboard.

Correction value: the error correction value after the system tracing calibration is used for compensating the error information of the calibration device, but the correction value is measured in advance and can be regarded as a known quantity in the application; in some embodiments, the correction values may also be ignored directly.

The utility model discloses only need once wiring just can accomplish the calibration of high pressure nuclear phase appearance, need not loaded down with trivial details operations such as transform wiring midway, realize the high pressure nuclear phase appearance of short-term test, improve detection work efficiency, the calibration operation that needs just can accomplish more than 1 hour now only needs 5 minutes just can accomplish in the past. Due to the standard program-controlled voltage source technology and the integrated design, the operation requirement of the wiring detection technology of the inspector is reduced, and the safety and effectiveness of detection are improved.

While the foregoing description shows and describes a preferred embodiment of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims (5)

1. The utility model provides a high pressure nuclear phase appearance calibrating device which characterized in that: the device comprises a VFD keyboard and two detection channels; each path of detection channel comprises a program-controlled standard voltage source, a power amplifier and a self-boosting standard voltage transformer;

the output end of the VFD keyboard is respectively connected with the program-controlled standard power supply in each road detection channel, and is used for quickly inputting set parameters through a digital keyboard and automatically transmitting the set parameters to the program-controlled standard voltage supply;

in each detection channel, the output end of the program-controlled standard power supply is connected with a self-boosting standard voltage transformer through a power amplifier, the output end of the self-boosting standard voltage transformer is connected with a high-voltage nuclear phase instrument to be detected, and the output end of the self-boosting standard voltage transformer is further connected with the feedback input end of the program-controlled standard voltage source.

2. The high-voltage nuclear phase instrument calibration device according to claim 1, characterized in that: the calibration device further comprises a linear power supply which is respectively connected with the power amplifier in each detection channel.

3. The high-voltage nuclear phase instrument calibration device according to claim 2, characterized in that: the linear power supply adopts a ring transformer step-down rectification technology to provide a pure power supply for the power amplifier, and digital signal interference introduced by the digital power supply to the power amplifier is avoided.

4. The high-voltage nuclear phase instrument calibration device according to claim 1, characterized in that: the program-controlled standard power supply comprises a digital signal source and a PID regulating circuit;

the PID regulating circuit is used for comparing the signal generated by the digital signal source with a standard voltage feedback signal generated by a self-boosting standard transformer and automatically correcting the signal;

the digital signal source comprises an ARM micro-control processor and a synchronous processing module; the synchronous processing module comprises a CPLD chip and a DAC module; the input end of the ARM micro-control processor is connected with the VFD keyboard, the output end of the ARM micro-control processor is connected with the signal input end of the PID adjusting circuit sequentially through the CPLD chip and the DAC module, the feedback input end of the PID adjusting circuit is connected with the output end of the self-boosting standard voltage transformer, and the output end of the PID adjusting circuit is connected with the power amplifier.

5. The high-voltage nuclear phase instrument calibration device according to claim 4, wherein: and the synchronous processing modules of the digital signal sources in the two detection channels are connected through a synchronous signal line, so that the signal synchronization between the two detection channels is ensured.

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