CN107167686B - Intelligent substation merging cells tests supporting device - Google Patents
Intelligent substation merging cells tests supporting device Download PDFInfo
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- CN107167686B CN107167686B CN201710547805.1A CN201710547805A CN107167686B CN 107167686 B CN107167686 B CN 107167686B CN 201710547805 A CN201710547805 A CN 201710547805A CN 107167686 B CN107167686 B CN 107167686B
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses a test matching device for a merging unit of an intelligent substation, which comprises: the analog quantity signal acquisition unit is used for acquiring analog quantity signals output by the merging unit tester; the analog quantity signal processing unit is used for converting alternating current voltage and current analog quantity output by the traditional merging unit tester into a small analog quantity signal; the A/D sampling unit is used for converting the small analog quantity signal into a preset digital signal; the digital signal processing unit is used for integrating and processing the digital signals acquired by the split-phase conversion; the CPU electro-optical conversion unit is used for sending the sorted digital message information, solves the technical problem that the conventional merging unit tester cannot test the electronic merging unit, realizes the rapid and reliable test of the electronic merging unit by using the conventional merging unit tester, and reasonably saves the technical effect of utilizing the original resources.
Description
Technical Field
The invention relates to the field of testing of merging units of transformer substations, in particular to a testing matching device for merging units of an intelligent transformer substation.
Background
Along with the rapid development of the intelligent transformer substation, novel intelligent equipment becomes an important component of the intelligent transformer substation. The merging unit is widely applied to an intelligent substation as a signal acquisition device connected with measurement, protection and control equipment, so that higher requirements are put forward on the testing of the merging unit.
In the 'twelve-five' period, the intelligent substation is in the initial stage of construction, and because the electronic transformer and the electronic merging unit are not developed at that time, the sampling precision and sensitivity of the electronic transformer are influenced by the field environment condition of the intelligent substation, and the use requirements cannot be met, the traditional transformer and the traditional merging unit are adopted in a large number by the newly-built intelligent substation in the 'twelve-five' period. The conventional merging unit is used for receiving analog quantity voltage and current signals of the conventional mutual inductor, converting the analog quantity voltage and current signals into digital quantity signals after the merging unit receives the analog quantity, and sending the digital quantity signals to other required intelligent equipment.
In order to test the conventional merging unit, a conventional merging unit tester was developed, which is based on the following principle: the current and voltage analog quantity signals output by the merging unit tester are used as standard sources, the output voltage and current signals are sent to the traditional merging unit, the merging unit converts the analog quantity signals into digital quantity signals and sends the digital quantity signals back to the traditional merging unit tester, and the traditional merging unit analyzes the precision, the angular difference and the specific difference of the digital quantity signals and the standard source analog quantity to complete the test of the merging unit device. During the construction period of 'twelve five', the traditional merging unit tester is widely applied.
Then, with the development of the smart grid technology, the technology of the electronic transformer and the electronic merging unit is mature, and the electronic transformer and the electronic merging unit are generally adopted in the thirteen-five period. The electronic merging unit tester is not developed and applied, a large number of traditional merging unit testers are eliminated in the development of the electronic merging unit tester, and the development difficulty and the time of the electronic merging unit tester are large.
In summary, in the process of implementing the technical solution of the present invention, the inventors of the present application find that the above-mentioned technology has at least the following technical problems:
in the prior art, the conventional merging unit tester has the technical problem that the electronic merging unit cannot be tested.
Disclosure of Invention
The invention provides a test matching device for a merging unit of an intelligent substation, which solves the technical problem that the traditional merging unit tester cannot test an electronic merging unit, realizes the rapid and reliable test of the electronic merging unit by using the traditional merging unit tester, and reasonably saves the technical effect of using the original resources.
In order to solve the technical problem, the application provides a supporting device of intelligent substation merging cells test, the device includes:
the analog quantity signal acquisition unit is used for acquiring analog quantity signals output by the merging unit tester;
the analog quantity signal acquisition unit is used for acquiring analog quantity signals output by the merging unit tester;
the analog quantity signal processing unit is used for converting the alternating voltage and current analog quantity output by the traditional merging unit tester into a small analog quantity signal of 4mA-20mA according to a certain transformation ratio;
the A/D sampling unit is used for converting the small analog quantity signal of 4mA-20mA into a digital signal according to a certain (different manufacturer specifications can be selected);
the digital signal processing unit is used for integrating the digital signals acquired by the phase splitting conversion, namely integrating A, B, C phases of digital signals of current and voltage respectively connected into a communication message, and outputting the respectively connected A-phase current and voltage to obtain current and voltage information in a digital channel;
and the CPU electro-optical conversion unit is used for sending the sorted digital message information.
Wherein, the principle of intelligent substation merging unit test supporting device in this application does: the device converts the acquired voltage and current information output by the traditional merging unit tester as a standard source into digital information of a selectable manufacturer communication protocol and sends the digital information to the digital merging unit, the merging unit receives the digital information, the digital information is collated and then fed back to the traditional merging unit tester, and the traditional merging unit tester compares the received digital information with the analog quantity information sent by the traditional merging unit tester as the standard source to test errors of the merging unit.
Furthermore, the merging unit tester is connected with the analog quantity signal acquisition unit, the analog quantity signal processing unit, the A/D sampling unit, the digital signal processing unit and the CPU electro-optical conversion unit which are sequentially connected, the CPU electro-optical conversion unit is connected with the merging unit, and the merging unit is connected with the merging unit tester.
Furthermore, the device is used for matching with the merging unit tester to test the electronic merging unit, and the device is used for converting standard current and voltage analog quantity information output by the merging unit tester into digital quantity information which can be recognized by the electronic merging unit.
Further, the analog quantity signal acquisition unit can acquire 6 paths of analog quantity voltage signals and 6 paths of analog quantity current signals. The information collected by the merging unit comprises A, B, C three-phase protection current and protection voltage respectively, and A, B, C three-phase measurement current and measurement voltage, so that 6 paths of analog quantity voltage signals and 6 paths of analog quantity current signals need to be collected in total.
Furthermore, the CPU electro-optical conversion unit is provided with 8 paths of optical port outputs, A, B, C phase voltage and current which are respectively collected are integrated into a A, B, C three-phase channel and a synchronous voltage channel during digital signal processing, and each phase channel contains current voltage information obtained by the phase, so that at least 4 paths of optical port outputs are required, and 4 groups of optical ports are added for redundant configuration.
Furthermore, the device is provided with 2 paths of optical ports for receiving the time synchronization signals, and the device needs to perform data analysis with a traditional merging unit tester and a merging unit device under the same time coordinate, so that the device needs to set a time signal interface for the time synchronization signals, and is redundant.
Furthermore, the device is provided with a data line interface and a power interface which are connected with an operating system, has a powerful configuration function and needs a data line to be connected with a client; the device needs to be powered and needs a power interface.
Furthermore, the device can configure the precision grades of analog quantity current and voltage channels, the precision grade requirements of the protection channel and the precision grade requirements of the measurement channel are written into the configuration at the same time when the FPGA program is written into, and the configuration can be selected according to the interface according to the protection grade or the measurement grade accessed when the interface is configured.
Furthermore, the device can self-define current and voltage phase selection channels and can define an optical port to output phase selection. When the channel is written into an FPGA program, the channel simultaneously writes configuration into a three-phase analog quantity channel for receiving voltage or current A, B, C, and when the analog quantity receiving interface is configured, the switched-in three-phase configuration of voltage and current A, B, C is selected. Meanwhile, when outputting optical signals, any one of the 8 groups of optical ports can be selected to output one phase of A, B, C.
Furthermore, the device can select the type of the electronic transformer, can select a manufacturer proprietary protocol of the electronic transformer, can configure a data channel of the manufacturer proprietary protocol, and can perform parameter setting on system parameters (namely, frequency, transformation ratio and the like).
One or more technical solutions provided by the present application have at least the following technical effects or advantages:
the technical problem that the conventional merging unit tester cannot test the electronic merging unit is solved, the electronic merging unit is tested quickly and reliably by the conventional merging unit tester, and the technical effect of reasonably saving and utilizing original resources is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention;
FIG. 1 is a schematic diagram of the apparatus of the present application in conjunction with a conventional merge unit tester to test an electronic merge unit.
Detailed Description
The invention provides a contact net geometric parameter detection and measurement system based on binocular stereo vision, solves the technical problem that the existing detection method based on monocular vision has an inherent error, and achieves the technical effects that the measurement system is reasonable in design and the geometric parameter detection and measurement result is accurate.
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflicting with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
Referring to fig. 1, the present application provides a testing kit for a merging unit of an intelligent substation, which solves the technical problem that a conventional merging unit tester cannot test an electronic merging unit, and achieves the technical effects of completing a fast and reliable test on the electronic merging unit by using the conventional merging unit tester and reasonably saving and utilizing the original resources.
In order to solve the technical problem, the application provides a supporting device of intelligent substation merging cells test, the device includes:
the analog quantity signal acquisition unit is used for acquiring analog quantity signals output by the merging unit tester;
the analog quantity signal processing unit is used for converting the alternating voltage and current analog quantity output by the traditional merging unit tester into a small analog quantity signal of 4mA-20mA according to a certain transformation ratio;
the A/D sampling unit is used for converting the small analog quantity signal of 4mA-20mA into a digital signal according to a certain (different manufacturer specifications can be selected);
the digital signal processing unit is used for integrating the digital signals acquired by the phase splitting conversion, namely integrating A, B, C phases of digital signals of current and voltage respectively connected into a communication message, and outputting the respectively connected A-phase current and voltage to obtain current and voltage information in a digital channel;
and the CPU electro-optical conversion unit is used for sending the sorted digital message information.
Wherein, the principle of intelligent substation merging unit test supporting device in this application does: the device converts the acquired voltage and current information output by the traditional merging unit tester as a standard source into digital information of a selectable manufacturer communication protocol and sends the digital information to the digital merging unit, the merging unit receives the digital information, the digital information is collated and then fed back to the traditional merging unit tester, and the traditional merging unit tester compares the received digital information with the analog quantity information sent by the traditional merging unit tester as the standard source to test errors of the merging unit.
Wherein, the supporting device of intelligent substation merging cells test in this application has following characteristics: (1) the electronic merging unit is tested by matching with a traditional merging unit tester. (2) The device can convert standard current and voltage analog quantity information output by a traditional merging unit tester into digital quantity information which can be recognized by the electronic merging unit. (3) The device has 6 paths of analog quantity voltage acquisition and 6 paths of analog quantity current acquisition. (4) The device has 8 paths of light port outputs. (5) The device has 2 routes of optical ports to receive time tick signals. (6) The device has a data line interface and a power interface which are connected with an operating system. (7) The device can configure the precision levels of analog quantity current and voltage channels. (8) The device can self-define the current and voltage phase selection channel. (9) The device may define an optical port output phase selection channel. (10) The device can select the type of the electronic transformer. (11) The device can select the proprietary protocol of the electronic transformer manufacturer. (12) The device may configure the vendor proprietary protocol data channel. (13) The device can perform parameter setting on system parameters, frequency, transformation ratio and the like.
Setting current and voltage output channels of a traditional merging unit tester, configuring current and voltage, receiving, system parameter setting, small analog quantity transformation ratio setting, sampling transformation ratio setting, frequency, effective value, sampling channel configuration, transformer type selection, contemporaneous voltage configuration, proprietary protocol manufacturer selection, proprietary protocol output channel configuration and the like of a matched device. And after configuration is finished, the digital quantity of the private protocol is output and sent to the electronic merging unit, and the electronic merging unit integrates signals and then sends the signals to a traditional merging unit tester to test the data of the electronic merging unit.
Furthermore, the merging unit tester is connected with the analog quantity signal acquisition unit, the analog quantity signal processing unit, the A/D sampling unit, the digital signal processing unit and the CPU electro-optical conversion unit which are sequentially connected, the CPU electro-optical conversion unit is connected with the merging unit, and the merging unit is connected with the merging unit tester.
Furthermore, the device is used for matching with the merging unit tester to test the electronic merging unit, and the device is used for converting standard current and voltage analog quantity information output by the merging unit tester into digital quantity information which can be recognized by the electronic merging unit.
Referring to fig. 1, current and voltage output channels of a conventional merging unit tester are set, and current and voltage, receiving, system parameter setting, small analog transformation ratio setting, sampling transformation ratio setting, frequency, effective value, sampling channel configuration, transformer type selection, contemporaneous voltage configuration, proprietary protocol manufacturer selection, proprietary protocol output channel configuration, and the like of a supporting device are configured. And after configuration is finished, the digital quantity of the private protocol is output and sent to the electronic merging unit, and the electronic merging unit integrates signals and then sends the signals to a traditional merging unit tester to test the data of the electronic merging unit.
One or more technical solutions provided by the present application have at least the following technical effects or advantages:
the technical problem that the conventional merging unit tester cannot test the electronic merging unit is solved, the electronic merging unit is tested quickly and reliably by the conventional merging unit tester, and the technical effect of reasonably saving and utilizing original resources is achieved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. The utility model provides a supporting device of intelligent substation merging cells test which characterized in that, the device includes:
the analog quantity signal acquisition unit is used for acquiring analog quantity signals output by the merging unit tester;
the analog quantity signal processing unit is used for converting alternating current voltage and current analog quantity output by the traditional merging unit tester into a preset analog quantity signal according to a certain transformation ratio;
the A/D sampling unit is used for converting a preset analog quantity signal into a preset digital signal;
the digital signal processing unit is used for integrating the digital signals acquired by the phase splitting conversion, namely integrating A, B, C phases of digital signals of current and voltage respectively connected into a communication message, and outputting the respectively connected A-phase current and voltage to obtain current and voltage information in a digital channel;
the CPU electro-optical conversion unit is used for sending the sorted digital message information; the merging unit tester, the analog quantity signal acquisition unit, the analog quantity signal processing unit, the A/D sampling unit, the digital signal processing unit and the CPU electro-optical conversion unit are sequentially connected, the CPU electro-optical conversion unit is connected with the merging unit, and the merging unit is connected with the merging unit tester; the device is used for being matched with the merging unit tester to test the electronic merging unit, and the device is used for converting standard current and voltage analog quantity information output by the merging unit tester into digital quantity information which can be recognized by the electronic merging unit.
2. The intelligent substation merging unit test matching device of claim 1, wherein the analog quantity signal acquisition unit is capable of acquiring 6 paths of analog quantity voltage signals and 6 paths of analog quantity current signals.
3. The intelligent substation merging unit test matching device of claim 1, wherein the CPU electrical-to-optical conversion unit is provided with 8 optical port outputs.
4. The intelligent substation merging unit test matching device of claim 1, wherein the device is provided with 2 optical ports for receiving time tick signals.
5. The intelligent substation merging unit test matching device of claim 1, wherein the device is provided with a data line interface and a power interface which are connected with an operating system.
6. The intelligent substation merging unit test matching device of claim 1, wherein the device is capable of configuring the precision levels of analog quantity current and voltage channels.
7. The intelligent substation merging unit test matching device of claim 1, wherein the device is capable of customizing current and voltage phase selection channels and defining an optical port output phase selection channel.
8. The intelligent substation merging unit test matching device according to claim 1, wherein the device can select the type of the electronic transformer, can select a manufacturer proprietary protocol of the electronic transformer, can configure a data channel of the manufacturer proprietary protocol, and can perform parameter setting on parameters of an electric power system.
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| CN107741549B (en) * | 2017-11-24 | 2019-09-06 | 国网四川省电力公司成都供电公司 | Based on analog quantity and the synchronous intelligent substation synchronism tester occurred of digital quantity |
| CN110441558A (en) * | 2019-09-17 | 2019-11-12 | 贵州电网有限责任公司 | It is a kind of to realize common-battery source and electronic mutual inductor acquisition device altogether |
| CN111141967B (en) * | 2019-10-28 | 2023-03-24 | 许昌开普检测研究院股份有限公司 | Method and system for detecting measurement error of merging unit tester of power system |
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| CN104316799A (en) * | 2014-10-30 | 2015-01-28 | 国家电网公司 | Metering merging unit checking device and method |
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| JP2012163434A (en) * | 2011-02-07 | 2012-08-30 | Rohm Co Ltd | Battery residual amount detection circuit, detection method, and electronic apparatus using the same |
| CN202443082U (en) * | 2012-02-24 | 2012-09-19 | 江苏凌创电气自动化股份有限公司 | Merging unit test system with analog input and university |
| CN103558571A (en) * | 2013-11-08 | 2014-02-05 | 国家电网公司 | Calibration system of electronic transformer and merging unit |
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