CN210775825U - Step response characteristic checking system of converter station direct current measuring device - Google Patents
Step response characteristic checking system of converter station direct current measuring device Download PDFInfo
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- CN210775825U CN210775825U CN201921582873.2U CN201921582873U CN210775825U CN 210775825 U CN210775825 U CN 210775825U CN 201921582873 U CN201921582873 U CN 201921582873U CN 210775825 U CN210775825 U CN 210775825U
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Abstract
The embodiment of the application provides a step response characteristic calibration system of a converter station direct current measuring device, which comprises an upper computer, a direct current step signal source, a power amplifier, a direct current transient state prepositive device and a direct current electronic transformer transient state calibrator. The upper computer is in communication connection with the direct current step signal source, the power amplifier is electrically connected with the direct current step signal source, the direct current transient state preposition device and the direct current measuring device to be measured are respectively electrically connected with the power amplifier, and the direct current electronic type mutual inductor transient state calibrator is respectively in communication connection with the direct current transient state preposition device and the direct current transient state preposition device. The embodiment of the application realizes the verification of the step response characteristic of the direct current measuring device, and the verification accuracy is high.
Description
Technical Field
The application relates to the technical field of direct current transformer detection, in particular to a step response characteristic verification system of a converter station direct current measuring device.
Background
An electronic direct current measuring device in a converter station is one of important devices in a direct current transmission system, the transmission and transformation links are complex, and the whole link is long after one-time sensing, analog-to-digital conversion, digitization and combination processing. The type test, the field test, the handover test and the periodic detection before the installation of the direct current measuring device are indispensable works for ensuring the safe operation of the direct current transmission system; at present, the field test of the electronic direct current measuring device is not smooth, and especially in the key indexes of frequency response and step response tests, a complete test system for the direct current measuring device is not provided.
SUMMERY OF THE UTILITY MODEL
The application provides a step response characteristic verification system of a converter station direct current measuring device to solve the problem of step response characteristic verification of the direct current measuring device.
The application provides a converter station direct current measuring device's step response characteristic check-up system, this system includes: an upper computer, a direct current step signal source, a power amplifier, a direct current transient state prepositive device and a direct current electronic transformer transient state calibrator,
the upper computer is in communication connection with the direct current step signal source and is used for configuring the direct current step signal source to output a transient direct current voltage signal;
the power amplifier is electrically connected with the direct current step signal source and is used for converting the transient direct current voltage signal into a primary current analog signal and a secondary voltage analog signal respectively;
the direct current transient state prepositive device is electrically connected with the power amplifier and is used for acquiring the secondary voltage analog signal and converting the secondary voltage analog signal into a standard current digital signal;
the direct current measuring device to be measured is electrically connected with the power amplifier and is used for acquiring the primary current analog signal and converting the primary current analog signal into a current digital signal to be measured;
the direct-current electronic transformer transient state calibrator is in communication connection with the direct-current transient state preposition device and the direct-current transient state preposition device respectively and is used for calibrating the current digital signal to be tested according to the standard current digital signal and the current digital signal to be tested.
Optionally, the power amplifier further comprises a balanced input module for reducing common mode noise.
Optionally, the upper computer is in communication connection with the direct current step signal source through an ethernet port.
Optionally, the dc transient front-end device and the dc electronic transformer transient calibrator are connected by optical fiber communication.
The beneficial effect of converter station direct current measuring device's step response characteristic check-up system that this application provided includes:
the embodiment of the application provides a converter station direct current measuring device's step response characteristic check-up system, control direct current step signal source through the host computer, simulate converter station trouble or abnormal operation, realize transient state direct current digital signal output, utilize power amplifier to carry out the equilibrium to transient state direct current digital signal, digital-to-analog conversion, after the power amplification processing, output primary current analog signal respectively to the direct current measuring device that awaits measuring, output secondary voltage analog signal to direct current transient state leading device, thereby make direct current electronic type mutual-inductor transient state check-up appearance can carry out the check-up to the direct current measurement that awaits measuring according to the signal of direct current transient state leading device output. In the embodiment of the application, the power amplifier comprises the balance conversion module, so that common-mode noise can be effectively reduced, and the accuracy of a step response characteristic test result is ensured.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic structural diagram of a step response characteristic verification system of a converter station dc current measurement device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a power amplifier according to an embodiment of the present disclosure.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, a schematic structural diagram of a step response characteristic verification system of a converter station dc current measurement device provided in an embodiment of the present application is shown in fig. 1, and the step response characteristic verification system of a converter station dc current measurement device provided in an embodiment of the present application includes an upper computer, a dc step signal source, a power amplifier, a dc transient state front-end device, and a dc electronic transformer transient state calibrator.
The upper computer is in communication connection with the direct current step signal source and is used for configuring the direct current step signal source to output transient direct current digital signals. In the embodiment of the application, dynamic current experiment software is arranged in the upper computer, the dynamic current experiment software can be selected as NTS501 direct current step and high frequency signal source software, a direct current step signal source can be selected as an NTS501 direct current step and high frequency signal source, the upper computer is connected with the NTS501 direct current step and high frequency signal source through the Ethernet, the NTS501 direct current step and high frequency signal source software in the upper computer is used for configuring the NTS501 direct current step and high frequency signal source, and the NTS501 direct current step and high frequency signal source outputs a 10V transient direct current voltage signal.
The power amplifier is electrically connected with the direct current step signal source and is used for converting the transient direct current voltage signal into a primary current analog signal and a secondary voltage analog signal respectively.
The power amplifier converts the transient DC voltage signal into a primary current analog signal and a secondary voltage analog signal respectively. Referring to fig. 2, a schematic structural diagram of a power amplifier according to an embodiment of the present invention is shown in fig. 2, where the power amplifier according to the embodiment of the present invention includes a high-precision regulated power supply, a high-power linear power supply, a first safety protection switch S1, and a second safety protection switch S2.
The input end of the power amplifier is the input end of a balance conversion module, the balance conversion module comprises an amplifier U1, the balance conversion module is used for reducing common-mode noise, the balance input module is used for controlling a common-mode rejection ratio, when a signal is amplified, external noise is often induced due to a loop distance, and the balance conversion module has good common-mode noise rejection capability when being used for balanced transmission.
The output end of the balance conversion module is respectively connected with the first signal processing and detecting module and the second signal processing and detecting module. The first signal processing and detecting module comprises an amplifier U2 and an amplifier U3, wherein one input end of the amplifier U2 is connected with the output end of the amplifier U1, and the output end of the amplifier U2 is sequentially connected with the first power conversion module, the first foil resistor, the first safety protection switch S1 and the output end of the power amplifier; one input terminal of the amplifier U3 is connected between the first power conversion module and the first foil resistor, the other input terminal is connected between the first foil resistor and the first safety protection switch S1, and the output terminal is connected to the other input terminal of the amplifier U2.
The second signal processing and detecting module, the second power detecting module, the second foil resistor and the second safety protection switch S2 have the same structure and connection relationship as the first signal processing and detecting module, the first power detecting module, the first foil resistor and the first safety protection switch S1.
The first signal processing and detecting module and the second signal processing and detecting module form a high-precision voltage-stabilized power supply, and the first power conversion module, the first foil resistor, the second power detecting module and the second foil resistor form a high-power linear power supply.
The direct current transient state preposition device is electrically connected with the power amplifier, acquires the secondary voltage analog signal and processes the secondary voltage analog signal, and comprises an analog-to-digital conversion unit which is used for converting the secondary voltage analog signal into a standard current digital signal.
The direct current measuring device to be measured is electrically connected with the power amplifier and used for acquiring a primary current analog signal and converting the primary current analog signal into a current digital signal to be measured.
The direct current electronic transformer transient state calibrator is in communication connection with the direct current transient state preposition device and the direct current measuring device to be measured respectively, and the direct current transient state preposition device and the direct current electronic transformer transient state calibrator are in communication connection through optical fibers.
The transient state calibrator of the direct current electronic transformer is used for calibrating the digital signal of the current to be measured according to the digital signal of the standard current and the digital signal of the current to be measured, and calculating the step amplitude and the step response time of the digital signal of the current to be measured according to the digital signal of the standard current and the digital signal of the current to be measured, so that the direct current measuring device to be measured is calibrated. In the embodiment of the application, the transient state calibrator of the direct current electronic transformer can be selected as the transient state calibrator of the direct current electronic transformer with the function of comparing the digital signal of the current to be measured with the digital signal of the current to be measured.
The step response characteristic verification system of the converter station direct current measuring device provided by the embodiment of the application has the following working process:
firstly, connecting an upper computer, a direct current step signal source, a power amplifier, a direct current transient state preposition device and a direct current electronic transformer transient state calibrator according to the connection relation introduced in the embodiment; secondly, configuring a direct current step signal source by using an upper computer, enabling the direct current step signal source to output a transient direct current voltage signal, outputting a primary current analog signal to a direct current measuring device to be measured through a power amplifier, and outputting a secondary voltage analog signal to a direct current transient prepositive device by the power amplifier; then, the direct current measuring device to be measured outputs a current digital signal to be measured to the transient state calibrator of the direct current electronic mutual inductor, and the direct current transient state prepositive device outputs a standard current digital signal to the transient state calibrator of the direct current electronic mutual inductor; and finally, the transient state calibrator of the direct current electronic transformer realizes calibration of the direct current measuring device to be measured by comparing the difference value of the standard current digital signal and the current digital signal to be measured.
It can be seen from the above embodiments that, in the step response characteristic verification system for a converter station dc current measurement device provided in this application, a dc step signal source is controlled by an upper computer, a fault or abnormal operation of the converter station is simulated, output of a transient dc digital signal is achieved, a power amplifier is used to balance and amplify the transient dc digital signal, and then a primary current analog signal is output to a dc current measurement device to be measured, and a secondary voltage analog signal is output to a dc transient front-end device, so that a dc electronic transformer transient calibrator can calibrate dc current measurement to be measured according to a signal output by the dc transient front-end device. In the embodiment of the application, the power amplifier comprises the balance conversion module, so that common-mode noise can be effectively reduced, and the accuracy of a step response characteristic test result is ensured.
Since the above embodiments are all described by referring to and combining with other embodiments, the same portions are provided between different embodiments, and the same and similar portions between the various embodiments in this specification may be referred to each other. And will not be described in detail herein.
It is noted that, in this specification, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a circuit structure, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such circuit structure, article, or apparatus. Without further limitation, the presence of an element identified by the phrase "comprising an … …" does not exclude the presence of other like elements in a circuit structure, article or device comprising the element.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
The above-described embodiments of the present application do not limit the scope of the present application.
Claims (4)
1. A step response characteristic verification system of a converter station direct current measuring device is characterized by comprising the following components: an upper computer, a direct current step signal source, a power amplifier, a direct current transient state prepositive device and a direct current electronic transformer transient state calibrator,
the upper computer is in communication connection with the direct current step signal source and is used for configuring the direct current step signal source to output a transient direct current voltage signal;
the power amplifier is electrically connected with the direct current step signal source and is used for converting the transient direct current voltage signal into a primary current analog signal and a secondary voltage analog signal respectively;
the direct current transient state prepositive device is electrically connected with the power amplifier and is used for acquiring the secondary voltage analog signal and converting the secondary voltage analog signal into a standard current digital signal;
the direct current measuring device to be measured is electrically connected with the power amplifier and is used for acquiring the primary current analog signal and converting the primary current analog signal into a current digital signal to be measured;
the direct-current electronic transformer transient state calibrator is in communication connection with the direct-current transient state preposition device and the direct-current transient state preposition device respectively and is used for calibrating the current digital signal to be tested according to the standard current digital signal and the current digital signal to be tested.
2. The system for verifying the step response characteristic of a converter station dc current measuring device according to claim 1, wherein said power amplifier comprises a balanced input module for reducing common mode noise.
3. The system for verifying the step response characteristics of the direct current measuring device of the converter station according to claim 1, wherein the upper computer is communicatively connected to the direct current step signal source through an ethernet port.
4. The system for verifying the step response characteristics of a direct current measuring device of a converter station according to claim 1, wherein the direct current transient front-end device and the direct current electronic transformer transient verifier are connected through optical fiber communication.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112379324A (en) * | 2020-11-30 | 2021-02-19 | 国网河北省电力有限公司营销服务中心 | Step response detection system of direct current transformer based on steepening leading edge current source |
| CN113640560A (en) * | 2021-10-13 | 2021-11-12 | 国网江西省电力有限公司电力科学研究院 | Method for generating parameterized trans-interval direct current step digital signals |
| CN114019297A (en) * | 2021-09-26 | 2022-02-08 | 中国电力科学研究院有限公司 | Distribution line high-frequency transient characteristic signal generating device and control method thereof |
-
2019
- 2019-09-20 CN CN201921582873.2U patent/CN210775825U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112379324A (en) * | 2020-11-30 | 2021-02-19 | 国网河北省电力有限公司营销服务中心 | Step response detection system of direct current transformer based on steepening leading edge current source |
| CN114019297A (en) * | 2021-09-26 | 2022-02-08 | 中国电力科学研究院有限公司 | Distribution line high-frequency transient characteristic signal generating device and control method thereof |
| CN114019297B (en) * | 2021-09-26 | 2023-11-03 | 中国电力科学研究院有限公司 | High-frequency transient characteristic signal generating device of distribution line and control method thereof |
| CN113640560A (en) * | 2021-10-13 | 2021-11-12 | 国网江西省电力有限公司电力科学研究院 | Method for generating parameterized trans-interval direct current step digital signals |
| CN113640560B (en) * | 2021-10-13 | 2022-03-11 | 国网江西省电力有限公司电力科学研究院 | Method for generating parameterized trans-interval direct current step digital signals |
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