CN113805002A - Detection device, method and equipment for power electronic direct current transformer and storage medium - Google Patents
Detection device, method and equipment for power electronic direct current transformer and storage medium Download PDFInfo
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Abstract
The application discloses detection device, method, equipment and storage medium of power electronic direct current transformer, the device includes: one of the power electronic direct current transformers is selected as an auxiliary transformer, and the low-voltage side of the auxiliary transformer is connected with a direct current power supply; selecting other two power electronic direct current transformers as tested transformers, and connecting the low voltage sides of the tested transformers in parallel through auxiliary inductors; the auxiliary transformer boosts the low voltage output by the direct-current power supply to the rated voltage of the high-voltage side for establishing a high-voltage test environment, and the first tested transformer and the second tested transformer form a split-drive loop for testing full-power operation. The test platform is simple to build, and energy loss is little in the test process, and the steps are simple. Therefore, the technical problems that the high-power electronic direct-current transformer is difficult to test, the test process is complex and the loss is serious in the prior art are solved.
Description
Technical Field
The present disclosure relates to the field of transformer technologies, and in particular, to a device, a method, an apparatus, and a storage medium for detecting a power electronic dc transformer.
Background
With the development of high-power electronic components and control technologies thereof, power electronic direct-current transformers which utilize power electronic conversion to realize voltage conversion and energy transfer have attracted more and more attention. The power electronic direct current transformer can realize the conversion of voltage and the control of power flow, and is a combination of a high-power semiconductor component, a high-frequency isolation transformer and a control system. The direct current transformer can meet the requirements of wide application, such as locomotive traction, smart grid and power industry.
In the topological structure of the circuit, the direct current transformer is composed of a large number of power modules in a series-parallel connection mode. Therefore, accurate monitoring and reliability control of all power modules are the key points for safe and stable operation of the power electronic direct current transformer. Besides fully testing the power module single body, the functional test of the whole direct current transformer is an essential step before power-on operation. The testing method is mainly used for testing the stability of the transformer running for a long time under rated voltage and current so as to verify the thermal stability, the electrical characteristics and the like of a power device. High power energy flow is an essential process in the testing process.
At present, a high-power direct-current power electronic transformer is limited by the voltage level of a power electronic device, and the rated voltage of a port is increased usually in a power module cascade mode; meanwhile, in order to increase rated current, the capacity can be increased by adopting a mode of connecting a plurality of groups of transformers in parallel; the testing difficulty of the high-power electronic direct-current transformer is high, the testing process is complex, and the loss is serious.
Disclosure of Invention
The application provides a detection device, a detection method, detection equipment and a storage medium for a power electronic direct current transformer, which are used for solving the technical problems of high difficulty, complex test process and serious loss in the prior art when the high-power electronic direct current transformer is tested.
In view of the above, the first aspect of the present application provides a detection apparatus for a power electronic dc transformer, the apparatus including:
the system comprises an auxiliary transformer, a first tested transformer, a second tested transformer, a control system and a direct-current power supply;
the low-voltage side of the auxiliary transformer is connected to the direct-current power supply; the high-voltage direct current side of the auxiliary transformer and the high-voltage direct current side of the first tested transformer are connected with the high-voltage direct current side of the second tested transformer in parallel; the low-voltage direct current side of the first tested transformer and the low-voltage direct current side of the second tested transformer are connected in parallel through an auxiliary inductor;
the control system is electrically connected with the auxiliary transformer, the first tested transformer and the second tested transformer respectively;
the auxiliary transformer is used for responding to a test command of the control system, boosting the low voltage output by the direct-current power supply to the rated working voltage of the high-voltage side of the auxiliary transformer, and adjusting the flowing direction and the flowing size of electric energy to enable the first tested transformer and the second tested transformer to be in a test state;
and the control system is used for acquiring the running state information of the first tested transformer and the second tested transformer when the first tested transformer and the second tested transformer are in a testing state, and adjusting the testing command according to an adjusting instruction.
Optionally, the method further comprises: an upper computer; the upper computer is in communication connection with the control system;
the upper computer is used for:
receiving the test command input by a working tester, and sending the test command to the control system;
and receiving the running state information for displaying, so that a tester inputs the adjustment instruction according to the running state information, and sends the adjustment instruction to the control system.
Optionally, the upper computer is further configured to: and sending a state detection instruction to the control system, so that the control system respectively performs state detection before testing on the first tested transformer and the second tested transformer, and receives and displays a state detection result.
Optionally, the test instruction includes: the power electronic direct current transformer comprises an operation mode, a voltage value, a current value and a protection signal.
Optionally, the operation state information includes: voltage, current, temperature.
Optionally, the upper computer is in communication connection with the control system, specifically: the upper computer is connected with the control system through an optical fiber.
A second aspect of the present application provides a method for detecting a power electronic dc transformer, which is applied to the apparatus for detecting a power electronic dc transformer in the first aspect, and the method includes:
the auxiliary transformer responds to a test command of the control system, boosts the low voltage output by the direct-current power supply to the rated working voltage of the high-voltage side of the auxiliary transformer, and adjusts the flowing direction and the magnitude of electric energy to enable the first tested transformer and the second tested transformer to be in a test state;
and when the first tested transformer and the second tested transformer are in a test state, the control system acquires the running state information of the first tested transformer and the second tested transformer and adjusts the test command according to an adjustment instruction.
Optionally, the method further comprises:
the upper computer receives the test command input by the working tester and sends the test command to the control system; and receiving the running state information for displaying, so that a tester inputs the adjustment instruction according to the running state information, and sends the adjustment instruction to the control system.
A third aspect of the application provides a detection device for a power electronic dc transformer, the device comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the steps of the detection method for a power electronic dc transformer according to the second aspect according to instructions in the program code.
A fourth aspect of the present application provides a computer-readable storage medium for storing program code for executing the method for detecting a power electronic dc transformer of the second aspect.
According to the technical scheme, the method has the following advantages:
the application provides a detection apparatus for power electronic direct current transformer, includes: the system comprises an auxiliary transformer, a first tested transformer, a second tested transformer, a control system and a direct-current power supply; the low-voltage side of the auxiliary transformer is connected with a direct-current power supply; the high-voltage direct current side of the auxiliary transformer and the high-voltage direct current side of the first tested transformer are connected with the high-voltage direct current side of the second tested transformer in parallel; the low-voltage direct current side of the first tested transformer and the low-voltage direct current side of the second tested transformer are connected in parallel through an auxiliary inductor; the control system is respectively electrically connected with the auxiliary transformer, the first tested transformer and the second tested transformer; the auxiliary transformer is used for responding to a test command of the control system, boosting the low voltage output by the direct-current power supply to the rated working voltage of the high-voltage side of the auxiliary transformer, and adjusting the flowing direction and the flowing size of electric energy to enable the first tested transformer and the second tested transformer to be in a test state; and the control system is used for acquiring the running state information of the first tested transformer and the second tested transformer when the first tested transformer and the second tested transformer are in the test state, and adjusting the test command according to the adjustment instruction.
According to the detection device of the power electronic direct-current transformer, one power electronic direct-current transformer is selected as an auxiliary transformer, and a direct-current power supply is connected to the low-voltage side of the auxiliary transformer; selecting other two power electronic direct current transformers as tested transformers, and connecting the low voltage sides of the tested transformers in parallel through auxiliary inductors; the auxiliary transformer boosts the low voltage output by the direct-current power supply to the rated voltage of the high-voltage side for establishing a high-voltage test environment, and the first tested transformer and the second tested transformer form a split-drive loop for testing full-power operation. The application designs a split-pulling testing device for the grouping connection and energy circulation of power electronic transformers; a novel method for testing the high-power stability of the power electronic direct-current transformer is provided based on a testing device. The technical scheme is simple and feasible, and the test circuit can be formed only by simply grouping the power electronic direct current transformers. The long-time test under the rated operation condition of the power electronic direct-current transformer is realized by adopting an energy circulation mode; the test platform is simple to build, energy loss is small in the test process, and the steps are simple. Therefore, the technical problems that the high-power electronic direct-current transformer is difficult to test, the test process is complex and the loss is serious in the prior art are solved.
Drawings
Fig. 1 is a schematic structural diagram of a detection apparatus for a power electronic dc transformer provided in an embodiment of the present application;
fig. 2 is a schematic flowchart of a detection method for a power electronic dc transformer according to an embodiment of the present disclosure;
FIG. 3 is a schematic circuit diagram of a power electronic DC transformer formed by connecting 9 modules in series at a high-voltage side and a low-voltage side in parallel;
fig. 4 is a schematic diagram of a parallel circuit of a conventional power electronic dc transformer.
Detailed Description
In order to make the technical solutions of the present application better understood, 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 of 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.
It should be noted that, the existing high-power dc power electronic transformer is limited by the voltage class of the power electronic device, and usually increases the rated voltage of the port by adopting the cascade connection of power modules; meanwhile, in order to increase rated current, the capacity is increased by adopting a mode of connecting a plurality of groups of transformers in parallel.
Taking a conventional power electronic dc transformer in fig. 3 as an example, the high-voltage side (B1, B2) of the dc transformer can be connected to a 10kV dc bus, and the low-voltage side (a1, a2) can be connected to a 750V dc bus. To increase the current rating, this can be done by connecting transformers in parallel as shown in fig. 3, as shown in fig. 4.
The power electronic dc transformer shown in fig. 4 is formed by connecting multiple sets of transformer units capable of operating independently in parallel, wherein the low-voltage sides of the transformer units are directly connected in parallel to form L1 and L2 terminals of the low-voltage sides; the high voltage side is directly connected in parallel to form the H1 and H2 terminals.
The application aims to provide a method for testing the operation stability of a power electronic direct-current transformer under rated working conditions (rated voltage and rated current), and solves the problems of high difficulty, complex test process and serious loss during high-power test of the power electronic direct-current transformer.
The power electronic transformer detection device with energy circulation and the detection method based on the detection device are provided according to the connection characteristics and the operation characteristics of the power electronic direct current transformer. The circuit scheme of the test is described in figure 1.
Referring to fig. 1, a detection apparatus for a power electronic dc transformer provided in an embodiment of the present application includes: the device comprises an auxiliary transformer, a first tested transformer, a second tested transformer, a control system and a direct-current power supply.
The low-voltage side of the auxiliary transformer is connected with a direct-current power supply; the high-voltage direct current side of the auxiliary transformer and the high-voltage direct current side of the first tested transformer are connected with the high-voltage direct current side of the second tested transformer in parallel; the low-voltage direct current side of the first tested transformer and the low-voltage direct current side of the second tested transformer are connected in parallel through the auxiliary inductor. The control system is respectively and electrically connected with the auxiliary transformer, the first tested transformer and the second tested transformer.
The auxiliary transformer is used for responding to a test command of the control system, boosting the low voltage output by the direct-current power supply to the rated working voltage of the high-voltage side of the auxiliary transformer, and adjusting the flowing direction and the flowing size of electric energy to enable the first tested transformer and the second tested transformer to be in a test state;
and the control system is used for acquiring the running state information of the first tested transformer and the second tested transformer when the first tested transformer and the second tested transformer are in the test state, and adjusting the test command according to the adjustment instruction.
In the embodiment of the present application, one of the power electronic dc transformers is selected as an auxiliary transformer, and the auxiliary transformer connects with the dc power supply at the low voltage side. And selecting other two power electronic direct current transformers as the tested transformers, wherein the low voltage sides of the tested transformers are connected in parallel through the auxiliary inductor L. The auxiliary transformer boosts the low voltage output by the direct-current power supply to the rated voltage of the high-voltage side for establishing a high-voltage test environment, and the first tested transformer and the second tested transformer form a split-drive loop for testing full-power operation.
Further, in an optional embodiment, the detection apparatus of the present application further includes: an upper computer; the upper computer is in communication connection with the control system;
the upper computer is used for: receiving a test command input by a working tester, and sending the test command to a control system; and receiving the running state information for displaying, so that a tester inputs an adjusting instruction according to the running state information, and sends the adjusting instruction to the control system.
Further, in a specific embodiment, the upper computer is further configured to: and sending a state detection instruction to the control system, so that the control system respectively detects the states of the first tested transformer and the second tested transformer before testing, and receives and displays the state detection results.
It should be noted that, a specific detection embodiment provided by the present application is divided into three steps: firstly, an energy circulation test loop of the power electronic direct current transformer is built, secondly, an uplink communication system and a downlink communication system based on an upper computer are built, and finally, the energy of the tested direct current transformer flows, so that the stability test of the direct current transformer is realized.
Wherein, build power electronics direct current transformer energy cycle test circuit, specifically include:
(1) preparing a direct current voltage source for testing to provide a testing voltage;
(2) as shown in fig. 1, DC + to the auxiliary transformer a1 and test power supply is connected; DC-connecting the auxiliary transformer A2 and a test power supply;
(3) according to the figure 1, the auxiliary transformer, the high voltage direct current side of the transformer 1 to be tested and the high voltage direct current side of the transformer 2 to be tested are connected in parallel;
(4) according to the diagram of fig. 1, the low-voltage dc side of the transformer 1 and the transformer 2 to be tested are connected in parallel by an auxiliary inductor L;
in the test process, energy circularly flows in the tested transformer 1 and the tested transformer 2, and the direct current power supply for test only provides energy lost when the detection module operates, so that the requirement on the power of the direct current power supply for test is not high.
(5) Connecting a power electronic direct-current transformer control system with an upper computer;
the power electronic direct current transformer control system needs to receive an operation instruction of an upper computer and upload operation state information of the power electronic direct current transformer, such as voltage, current, temperature and the like, to the upper computer, so that the upper computer can adjust the operation instruction by combining the information.
Wherein, set up the upper and lower communication system based on host computer, specifically include:
(1) the power electronic direct current transformer control system communicates with an upper computer in an optical fiber mode;
(2) the upper computer sends a response instruction to the power electronic direct current transformer control system according to the test target, and simultaneously monitors the operation data returned by the power electronic direct current transformer control system; the power electronic direct current transformer control system controls the operation of the detection module according to the received instruction, realizes energy control, and uploads the operation implementation state information to the upper computer.
The information that power electronics direct current transformer control system uploaded to the host computer mainly includes: the voltage, current, power module temperature, and power module operating status of the power electronic dc transformer.
The information that the host computer issued power electronics direct current transformer control system mainly includes: the control method comprises the following steps of a power electronic direct current transformer operation mode, a system starting/stopping command, a power electronic direct current transformer voltage/current instruction, a power electronic direct current transformer control protection signal and the like.
Finally, the upper computer controls the detection to run, so that a complete test project is realized, and the method specifically comprises the following steps:
in the power electronic direct current transformer test system, an upper computer is a control core of the whole system and is responsible for setting the operation mode, starting/stopping control, issuing voltage/current instructions and the like of the power electronic direct current transformer. The test procedure and test contents were as follows:
(1) connecting a power electronic direct current transformer and a test power supply according to the circuit of the figure 1, and confirming that the main loop is connected reliably;
(2) checking that the communication optical fiber connection between the power electronic direct current transformer control system and the upper computer is correct;
(3) starting a test power supply, and adjusting the output voltage of the power supply to reach the rated voltage of the low-voltage side of the power electronic direct-current transformer;
(4) and testing the output voltage of the power supply, controlling the system to start working after the auxiliary transformer automatically gets power, and simultaneously establishing communication with an upper computer. Checking whether the state of the auxiliary transformer is normal or not through the upper computer;
(5) the upper computer controls the voltage of the high-voltage side of the auxiliary transformer to reach the rated working voltage;
(6) and after the tested transformer 1 and the tested transformer 2 automatically take power, the control system starts to work, and meanwhile, communication with an upper computer is established. Checking whether the states of the tested transformer 1 and the tested transformer 2 are normal or not through an upper computer;
(7) the upper computer outputs the power and the flow direction to be tested, issues specific control instructions to the control systems of the tested transformer 1 and the tested transformer 2, and starts to operate the tested transformer 1 and the tested transformer 2 according to the test requirements after the test is started;
(8) keeping the system running according to the time required by the test, and simultaneously recording various key data in the test process;
(9) after the test is finished, the power instruction is set to be 0 in the upper computer, the shutdown instruction is issued, the whole test system stops running, then the test power supply is turned off, and the whole test is finished.
The above is an embodiment of a detection apparatus for a power electronic dc transformer provided in the embodiments of the present application, and the following is an embodiment of a detection method for a power electronic dc transformer provided in the embodiments of the present application.
Referring to fig. 2, a method for detecting a power electronic dc transformer according to an embodiment of the present disclosure includes:
and 101, receiving a test command input by a working tester by an upper computer, and sending the test command to a control system.
And 102, the auxiliary transformer responds to a test command of the control system, boosts the low voltage output by the direct-current power supply to the rated working voltage of the high-voltage side of the auxiliary transformer, and adjusts the flowing direction and the flowing size of electric energy, so that the first tested transformer and the second tested transformer are in a test state.
And 103, when the first tested transformer and the second tested transformer are in a test state, the control system acquires the running state information of the first tested transformer and the second tested transformer.
And 104, receiving and displaying the running state information by the upper computer, so that a tester inputs an adjusting instruction according to the running state information and sends the adjusting instruction to the control system.
And 105, adjusting the test command by the control system according to the adjusting instruction.
Further, the embodiment of the present application also provides a detection device for a power electronic dc transformer, where the device includes a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the detection method of the power electronic direct current transformer according to the instructions in the program code.
Further, the present application provides a computer-readable storage medium, where the computer-readable storage medium is configured to store a program code, where the program code is configured to execute the method for detecting a power electronic dc transformer according to the foregoing method embodiment.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the method described above may refer to the corresponding process in the foregoing device embodiment, and is not described herein again.
The terms "first," "second," "third," "fourth," and the like in the description of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A detection device for a power electronic direct current transformer is characterized by comprising: the system comprises an auxiliary transformer, a first tested transformer, a second tested transformer, a control system and a direct-current power supply;
the low-voltage side of the auxiliary transformer is connected to the direct-current power supply; the high-voltage direct current side of the auxiliary transformer and the high-voltage direct current side of the first tested transformer are connected with the high-voltage direct current side of the second tested transformer in parallel; the low-voltage direct current side of the first tested transformer and the low-voltage direct current side of the second tested transformer are connected in parallel through an auxiliary inductor;
the control system is electrically connected with the auxiliary transformer, the first tested transformer and the second tested transformer respectively;
the auxiliary transformer is used for responding to a test command of the control system, boosting the low voltage output by the direct-current power supply to the rated working voltage of the high-voltage side of the auxiliary transformer, and adjusting the flowing direction and the flowing size of electric energy to enable the first tested transformer and the second tested transformer to be in a test state;
and the control system is used for acquiring the running state information of the first tested transformer and the second tested transformer when the first tested transformer and the second tested transformer are in a testing state, and adjusting the testing command according to an adjusting instruction.
2. A power electronic dc transformer detection apparatus according to claim 1, further comprising: an upper computer; the upper computer is in communication connection with the control system;
the upper computer is used for:
receiving the test command input by a working tester, and sending the test command to the control system;
and receiving the running state information for displaying, so that a tester inputs the adjustment instruction according to the running state information, and sends the adjustment instruction to the control system.
3. The detection device of the power electronic direct-current transformer according to claim 2, wherein the upper computer is further configured to: and sending a state detection instruction to the control system, so that the control system respectively performs state detection before testing on the first tested transformer and the second tested transformer, and receives and displays a state detection result.
4. The power electronic dc transformer detection device of claim 1, wherein the test instructions comprise: the power electronic direct current transformer comprises an operation mode, a voltage value, a current value and a protection signal.
5. A power electronic dc transformer detection apparatus according to claim 1, wherein the operation state information comprises: voltage, current, temperature.
6. The detection device of the power electronic direct-current transformer as claimed in claim 2, wherein the upper computer is in communication connection with the control system, and specifically comprises: the upper computer is connected with the control system through an optical fiber.
7. A detection method of a power electronic direct current transformer is characterized by being applied to a detection device of the power electronic direct current transformer as claimed in any one of claims 1 to 6, and the method comprises the following steps:
the auxiliary transformer responds to a test command of the control system, boosts the low voltage output by the direct-current power supply to the rated working voltage of the high-voltage side of the auxiliary transformer, and adjusts the flowing direction and the magnitude of electric energy to enable the first tested transformer and the second tested transformer to be in a test state;
and when the first tested transformer and the second tested transformer are in a test state, the control system acquires the running state information of the first tested transformer and the second tested transformer and adjusts the test command according to an adjustment instruction.
8. The method for detecting the power electronic direct current transformer according to claim 7, further comprising:
the upper computer receives the test command input by the working tester and sends the test command to the control system; and receiving the running state information for displaying, so that a tester inputs the adjustment instruction according to the running state information, and sends the adjustment instruction to the control system.
9. A detection device for a power electronic dc transformer, the device comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the method for detecting a power electronic dc transformer according to any one of claims 7 to 8 according to instructions in the program code.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium is used for storing program code for executing the method for detecting a power electronic dc transformer according to any of claims 7-8.
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| CN202111094450.8A CN113805002B (en) | 2021-09-17 | 2021-09-17 | Detection device, method and equipment for power electronic direct current transformer and storage medium |
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| CN202111094450.8A CN113805002B (en) | 2021-09-17 | 2021-09-17 | Detection device, method and equipment for power electronic direct current transformer and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117035367A (en) * | 2023-09-28 | 2023-11-10 | 国网江苏省电力有限公司电力科学研究院 | Intelligent distribution transformer quick detection device and measurement and control method and system thereof |
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| CN117035367B (en) * | 2023-09-28 | 2024-01-23 | 国网江苏省电力有限公司电力科学研究院 | Intelligent distribution transformer quick detection device and measurement and control method and system thereof |
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