Topological structure of power module of power electronic transformer
By introducing detection lines and current sensors into the transformer topology, combining the processing chip and electric telescopic rod, the self-test and automatic adjustment functions of the transformer topology are realized, which solves the problem that the existing topology cannot be self-tested and adjusted, ensuring that The transformer operates the circuit stably.
Patent Information
- Application Number
- CN202411529076.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-02-07
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing transformer topology lacks self-test function and cannot perform temporary adjustments when a line failure occurs, which affects the transformer's normal regulation ability of the circuit.
A power electronic transformer power module topology is designed, including a protective housing, a rotating door panel, a transmission line, a power switch and a detector. The current is directed to the current sensor through the first and second detection lines, the line failure is judged, and the backup line is automatically connected by the processing chip and the electric telescopic rod to ensure that the topology continues to operate in the event of a failure.
The self-test function of the topology structure is realized, and promptly warns and automatically adjusts when a fault occurs, ensuring the stable regulation capability of the transformer to the circuit.
Smart Images
Figure CN119401428A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of circuit topology structures, in particular to a power module topology structure of a power electronic transformer. Background Art
[0002] Transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are primary coil, secondary coil and iron core. Its main functions include voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization, etc. Transformers can be divided into distribution transformers, power transformers, fully sealed transformers, combined transformers, dry-type transformers, oil-immersed transformers, single-phase transformers, electric furnace transformers, rectifier transformers, reactors, anti-interference transformers, lightning protection transformers, box-type transformer test transformers, etc.
[0003] The transformer regulates the circuit through the circuit topology. Circuit topology, also known as circuit structure, refers to the connection relationship and properties of the circuit, that is, the connection relationship between branches and nodes. The circuit topology refers to an entire connected circuit loop. The transformer shunts and guides the current in the power grid through the circuit topology to ensure stable operation of the power grid.
[0004] However, the existing topology does not have a self-checking function, and cannot be temporarily adjusted when a line fault occurs, which affects the transformer's normal ability to adjust the circuit; therefore, it does not meet existing needs. In this regard, we propose a power electronic transformer power module topology. Summary of the invention
[0005] The purpose of the present invention is to provide a power electronic transformer power module topology structure to solve the problems that the existing topology structure proposed in the above background technology does not have a self-checking function, cannot be temporarily adjusted when a line fails, and affects the normal adjustment ability of the transformer to the circuit.
[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a power electronic transformer power module topology structure, including a protective shell and a power switch, a revolving door plate is rotatably installed on the upper surface of the protective shell, a plurality of transmission lines distributed at equal intervals are installed inside the protective shell, a transmission connection terminal is provided at one end of the transmission line, a power switch connection line is fixed at the other end of the transmission connection terminal, one end of the power switch connection line passes through the protective shell and is connected to the power switch, the other end of the transmission line is connected to a line connection terminal, the other end of the line connection terminal is connected to an output line, a metal conductor is fixed inside the transmission connection terminal, the ends of the transmission line and the power switch connection line close to the transmission connection terminal are fixed to the metal conductor, and a detector is fixed on the upper surface of the transmission connection terminal.
[0007] Preferably, the detector includes an insulating shell, which is fixed on the upper surface of the transmission connection terminal, and a first current sensor, a second current sensor, a processing chip, a signal transceiver and a data storage chip are installed inside the insulating shell. The processing chip and the data storage chip have unidirectional signal transmission, and the first current sensor, the second current sensor, the signal transceiver and the processing chip have unidirectional signal transmission.
[0008] Preferably, a first detection line is fixed on one side of the first current sensor, one end of which passes through the insulating shell and is fixedly connected to the output line, and a second detection line is fixed on one side of the second current sensor, one end of which passes through the insulating shell and is fixedly connected to the end of the transmission line close to the line connection terminal.
[0009] Preferably, an electric telescopic rod is fixed to one end of the transmission connection terminal, a clamp is fixed to the movable end of the electric telescopic rod, a spare line parallel to the transmission line is installed on one side of the transmission line, and one end of the spare line passes through the protective shell.
[0010] Preferably, the other end of the standby line is slidably inserted into the end of the transmission connection terminal, and two insulating isolation blocks are provided between the standby line and the metal conductor.
[0011] Preferably, the two insulating isolation blocks are made of hard plastic and are provided with a conical groove at the end close to the spare line, and the maximum radius of the conical groove is equal to the radius of the spare line.
[0012] Preferably, the two insulating isolation blocks are each provided with a C-shaped ring inside, an elastic rubber ring is inserted into the C-shaped ring, and the two insulating isolation blocks are connected via the elastic rubber ring.
[0013] Preferably, the clamping fixture has three ends, one of which is fixed to the movable end of the electric telescopic rod, and the other two ends of the clamping fixture are curved in an arc shape, and the bending radius is less than or equal to the spare line radius, and the clamping fixture is made of plastic.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] 1. The present invention guides the current in the output line and the transmission line to the first current sensor and the second current sensor through the first detection line and the second detection line when the topology structure is in operation, and determines whether the output line and the transmission line are faulty by whether the first current sensor and the second current sensor receive the current, thereby determining whether the topology structure is faulty, and performing self-inspection on the topology structure when the topology structure is in operation, and alerting the power center as soon as the topology structure is interrupted or fails, and improving the detection and maintenance of the staff;
[0016] 2. The present invention sends a start signal to the electric telescopic rod when any one or both of the output line and the transmission line fails, and the electric telescopic rod drives the clamping fixture and the spare line to move, so that the spare line approaches the metal conductor and squeezes the two insulating isolation blocks, so that the two insulating isolation blocks are separated from each other until the spare line is connected to the metal conductor. At this time, the current in the power switch connecting line is transmitted into the spare line through the metal conductor to ensure that when any one or both of the transmission lines fail, the topological structure can continue to operate without affecting the transformer's regulation of the current in the circuit. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0018] Figure 2 It is a structural schematic diagram of the detector of the present invention;
[0019] Figure 3 It is a schematic diagram of the internal structure of the insulating housing of the present invention;
[0020] Figure 4 It is a structural cross-sectional view of the transmission connection terminal of the present invention;
[0021] Figure 5 A top view of the structure of the insulating isolation block of the present invention;
[0022] Figure 6 It is a schematic diagram of the detection process of the present invention.
[0023] In the figure: 1. protective shell; 2. revolving door panel; 3. output line; 4. spare line; 5. line connection terminal; 6. detector; 61. insulating shell; 62. first detection line; 63. second detection line; 64. first current sensor; 65. second current sensor; 66. processing chip; 67. signal transceiver; 68. data storage chip; 7. transmission line; 8. transmission connection terminal; 9. power switch connection line; 10. electric telescopic rod; 11. elastic rubber ring; 12. clamping fixture; 13. metal conductor; 14. insulating isolation block. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0025] like Figure 1 and Figure 2As shown, the topological structure of the power module of the power electronic transformer includes a protective shell 1 and a power switch. A revolving door panel 2 is rotatably installed on the upper surface of the protective shell 1. A plurality of transmission lines 7 with equal spacing are installed inside the protective shell 1. A transmission connection terminal 8 is provided at one end of the transmission line 7. A power switch connection line 9 is fixed at the other end of the transmission connection terminal 8. One end of the power switch connection line 9 passes through the protective shell 1 and is connected to the power switch. A line connection terminal 5 is connected at the other end of the transmission line 7. An output line 3 is connected at the other end of the line connection terminal 5. A metal conductor 13 is fixed inside the transmission connection terminal 8. The ends of the transmission line 7 and the power switch connection line 9 close to the transmission connection terminal 8 are fixed to the metal conductor 13. A detector 6 is fixed on the upper surface of the transmission connection terminal 8. When the power electronic transformer is running and the current in the circuit is adjusted through the topological structure, the transmission line 7 and the output line 3 are detected by the detector 6 to determine whether the current flow inside the transmission line 7 and the output line 3 is normal and whether the transmission line 7 and the output line 3 are faulty.
[0026] like Figures 1 to 3 and Figure 6 As shown, the detector 6 includes an insulating shell 61, which is fixed on the upper surface of the transmission connection terminal 8. The first current sensor 64, the second current sensor 65, the processing chip 66, the signal transceiver 67 and the data storage chip 68 are installed inside the insulating shell 61. The processing chip 66 and the data storage chip 68 transmit signals in one direction. The first current sensor 64, the second current sensor 65, the signal transceiver 67 and the processing chip 66 transmit signals in one direction. The data storage chip 68 is used to record the data detected by the first current sensor 64 and the second current sensor 65, and the processing chip 66 is connected to the control terminal or data terminal of the power grid center through the signal transceiver 67 to realize data transmission.
[0027] A first detection line 62 is fixed to one side of the first current sensor 64, one end of the first detection line 62 passes through the insulating shell 61 and is fixedly connected to the output line 3. A second detection line 63 is fixed to one side of the second current sensor 65, one end of the second detection line 63 passes through the insulating shell 61 and is fixedly connected to the end of the transmission line 7 close to the line connection terminal 5. When current flows inside the transmission line 7 and the output line 3, the current flows along the second detection line 63 and the first detection line 62 to reach the second current sensor 65 and the first current sensor 64 respectively. If the second current sensor 65 and the first current sensor 64 detect the current, it means that the transmission line 7 and the output line 3 are not faulty. If the second current sensor 65 and the first current sensor 64 do not detect the current, it means that the transmission line 7 and the output line 3 are faulty.
[0028] like Figure 4 and Figure 5As shown, an electric telescopic rod 10 is fixed to one end of the transmission connection terminal 8, and a clamping fixture 12 is fixed to the movable end of the electric telescopic rod 10. A standby line 4 parallel to the transmission line 7 is installed on one side of the transmission line 7. One end of the standby line 4 passes through the protective shell 1, and the other end of the standby line 4 is slidably inserted into the end of the transmission connection terminal 8. Two insulating isolation blocks 14 are provided between the standby line 4 and the metal conductor 13. When a fault occurs in the transmission line 7 or the output line 3, the standby line 4 is used to transmit current to ensure the normal operation of the topological structure.
[0029] The two insulating isolation blocks 14 are made of hard plastic and are provided with a conical groove near the end of the spare line 4. The maximum radius of the conical groove is equal to the radius of the spare line 4. The interior of the two insulating isolation blocks 14 is provided with a C-shaped ring. The interior of the C-shaped ring is interspersed with an elastic rubber ring 11. The two insulating isolation blocks 14 are connected by the elastic rubber ring 11. The insulating isolation blocks 14 are used to separate the spare line 4 from the metal conductor 13 to ensure that when the transmission line 7 and the output line 3 do not fail, the current will not enter the spare line 4 from the metal conductor 13. When the conical groove at the end of the insulating isolation block 14 is squeezed by the end of the spare line 4, the two insulating isolation blocks 14 move to both sides to ensure that when the transmission line 7 and the output line 3 fail, when the spare line 4 moves toward the metal conductor 13, the spare line 4 and the metal conductor 13 are smoothly docked and the current is drained.
[0030] The clamping fixture 12 has three ends, one of which is fixed to the movable end of the electric telescopic rod 10, and the other two ends of the clamping fixture 12 are curved in an arc shape, and the bending radius is less than or equal to the radius of the spare line 4. The clamping fixture 12 is made of plastic. The ends of the spare line 4 are clamped and fixed by the clamping fixture 12 to ensure that when the electric telescopic rod 10 drives the clamping fixture 12 to move, the spare line 4 moves simultaneously with the clamping fixture 12, thereby realizing the docking or separation of the spare line 4 and the metal conductor 13.
[0031] Working principle: First, connect the end of the power switch connecting line 9 to the power switch of the transformer. When the transformer regulates the current in the circuit through the topological structure, the current enters the power switch connecting line 9 through the power switch, and enters the transmission connection terminal 8 connected to the power switch connecting line 9 along the power switch connecting line 9. At this time, the current will enter the transmission line 7 along the metal conductor 13, and enter the output line 3 through the transmission line 7 and the line connection terminal 5. When the current enters the transmission line 7 and the output line 3, part of the current enters the second current sensor 65 and the first current sensor 64 from the second detection line 63 and the first detection line 62 respectively. At this time, the second current sensor 65 and the first current sensor 64 detect the arrival of the current, and the second current sensor 65 and the first current sensor 64 feed back the signal to the processing chip 66. The processing chip 66 converts the signal into data and stores it in the data storage chip 68. At the same time, the processing chip 66 feeds back the signal to the control terminal or data terminal of the power grid center through the signal transceiver 67;
[0032] If the topology structure is running, but no current reaches the second current sensor 65 and the first current sensor 64 in the second detection line 63 and the first detection line 62, the second current sensor 65 and the first current sensor 64 will feed back the signal of no current detection to the processing chip 66, and the processing chip 66 will convert the signal into data and store it in the data storage chip 68. At the same time, the processing chip 66 will feed back the signal to the control terminal or data terminal of the power grid center through the signal transceiver 67, and the control terminal or data terminal of the power grid center will issue a topology structure terminal alarm to remind the staff to check and maintain, and perform self-inspection on the topology structure when the topology structure is running, and warn the power center as soon as the topology structure is interrupted or fails, and improve the staff to perform detection and maintenance;
[0033] When any one or both of the output line 3 and the transmission line 7 fails and causes the first current sensor 64 and the second current sensor 65 to have no current, the processing chip 66 sends a start signal to the electric telescopic rod 10, and the electric telescopic rod 10 drives the clamping fixture 12 to move toward the transmission connection terminal 8. At this time, the clamping fixture 12 drives the spare line 4 to move at the same time, and makes the end of the spare line 4 squeeze the two insulating isolation blocks 14, so that the two insulating isolation blocks 14 are oppositely separated and the elastic rubber ring 11 is pulled up until the spare line 4 is connected to the metal conductor 13. At this time, the current in the power switch connecting line 9 is transmitted into the spare line 4 through the metal conductor 13 to ensure that when any one or both of the output line 3 and the transmission line 7 fail, the topological structure can continue to operate without affecting the transformer's regulation of the current in the circuit.
[0034] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.
Claims
1. A power electronic transformer power module topology structure, comprising a protective housing (1) and a power switch, characterized in that: A revolving door plate (2) is rotatably mounted on the upper surface of the protective shell (1), and a plurality of transmission lines (7) distributed at equal intervals are mounted inside the protective shell (1). A transmission connection terminal (8) is provided at one end of the transmission line (7), and a power switch connection line (9) is fixed to the other end of the transmission connection terminal (8). One end of the power switch connection line (9) passes through the protective shell (1) and is connected to the power switch. The other end of the transmission line (7) is connected to a line connection terminal (5), and the other end of the line connection terminal (5) is connected to an output line (3). A metal conductor (13) is fixed inside the transmission connection terminal (8), and the ends of the transmission line (7) and the power switch connection line (9) close to the transmission connection terminal (8) are fixed to the metal conductor (13), and a detector (6) is fixed to the upper surface of the transmission connection terminal (8).
2. The power electronic transformer power module topology structure according to claim 1 is characterized in that: The detector (6) comprises an insulating shell (61), wherein the insulating shell (61) is fixed on the upper surface of the transmission connection terminal (8), and a first current sensor (64), a second current sensor (65), a processing chip (66), a signal transceiver (67) and a data storage chip (68) are installed inside the insulating shell (61), wherein the processing chip (66) and the data storage chip (68) perform unidirectional signal transmission, and the first current sensor (64), the second current sensor (65), the signal transceiver (67) and the processing chip (66) perform unidirectional signal transmission.
3. The power electronic transformer power module topology structure according to claim 2 is characterized in that: A first detection line (62) is fixed on one side of the first current sensor (64), one end of the first detection line (62) passes through the insulating housing (61) and is fixedly connected to the output line (3), and a second detection line (63) is fixed on one side of the second current sensor (65), one end of the second detection line (63) passes through the insulating housing (61) and is fixedly connected to the end of the transmission line (7) close to the line connection terminal (5).
4. The power electronic transformer power module topology structure according to claim 1, characterized in that: An electric telescopic rod (10) is fixed to one end of the transmission connection terminal (8), a clamping fixture (12) is fixed to the movable end of the electric telescopic rod (10), a standby line (4) parallel to the transmission line (7) is installed on one side of the transmission line (7), and one end of the standby line (4) passes through the protective housing (1).
5. The power electronic transformer power module topology structure according to claim 4 is characterized in that: The other end of the standby line (4) is slidably inserted into the end of the transmission connection terminal (8), and two insulating isolation blocks (14) are provided between the standby line (4) and the metal conductor (13).
6. The power electronic transformer power module topology structure according to claim 5, characterized in that: The two insulating isolation blocks (14) are made of hard plastic and are provided with conical grooves at the ends close to the spare wire (4), wherein the maximum radius of the conical groove is equal to the radius of the spare wire (4).
7. The power electronic transformer power module topology structure according to claim 6, characterized in that: The two insulating isolation blocks (14) are each provided with a C-shaped ring channel, an elastic rubber ring (11) is inserted into the C-shaped ring channel, and the two insulating isolation blocks (14) are connected via the elastic rubber ring (11).
8. The power electronic transformer power module topology structure according to claim 4, characterized in that: The clamping fixture (12) has three ends, one of which is fixed to the movable end of the electric telescopic rod (10), and the other two ends of the clamping fixture (12) are curved in an arc shape, and the bending radius is less than or equal to the radius of the spare line (4), and the clamping fixture (12) is made of plastic.