Multi-spiral resistance-capacitance element voltage transformer and broadband transmission circuit

Abstract

The invention discloses a multi-spiral resistor-capacitor element voltage transformer and a broadband transmission circuit, and relates to the field of voltage transformers, the multi-spiral resistor-capacitor element voltage transformer comprises a resistor-capacitor assembly and a resistor cylinder, the outer wall of the resistor cylinder is provided with a plurality of axially distributed spiral grooves, and a plurality of groups of resistor strings are embedded in the spiral grooves; elastic leads are arranged at two ends of the resistor string; the first flange and the second flange are fixedly connected with the two ends of the resistor cylinder. And a resistance-capacitance unit, the voltage transformation unit comprises a low-voltage arm and a resistor box; the screening unit comprises a far-end detection module and an acquisition module; and the acquisition module is connected in series with the far-end detection module, the high-pass filter B and the wave recording device. According to the utility model, the heat dissipation efficiency and the measurement efficiency of the resistor are improved by utilizing effective structure combination and material configuration, and the measurement frequency range of the mutual inductor is enhanced on the premise of ensuring the stability by utilizing a plurality of filtering devices with different levels, a preposed transformation circuit and a resistance-capacitance element.

Description

Technical Field

[0001] The invention relates to the field of voltage transformers, in particular to a multi-spiral resistor-capacitor voltage transformer and a broadband transmission circuit. Background Art

[0002] DC voltage transformers are indispensable AC and DC measuring equipment in DC transmission systems. They play an important role in power monitoring and relay signal measurement and transmission. The long-term operating reliability of the product is also particularly important.

[0003] A transformer needs to be able to measure DC voltage and AC voltage at the same time. The existing technical solutions only include resistor-capacitor parallel voltage division and resistor-capacitor mixed voltage division.

[0004] At present, the height of 800kV DC transformer after installation is close to 20 meters from the ground, and the total height of the product is more than 12 meters. The diameter of the external composite insulator is relatively thick, and the windward area is relatively large. The transformer is prone to large-scale horizontal displacement. If the voltage transformer is not designed to adapt to the component deflection caused by the harsh environment, it is easy to cause the internal connection of more than one million DC voltage transformers to be damaged or affect the stability of the potential. In addition, the transformer resistors in the prior art are generally single-string designs, and the fixing method is epoxy coating or hardware fastening. After the resistor is open, the signal output disappears. Under the influence of the environment, the resistor heats up or shakes frequently. The resistor arrangement method of the prior art is very likely to cause stress concentration, affecting the heat dissipation efficiency of the resistor. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the invention of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the above and / or existing prior art, the current 800kV DC transformer is installed at a height of nearly 20 meters from the ground, the total height of the product is more than 12 meters, the diameter of the external composite insulator is relatively thick, the windward area is relatively large, and the fixing method is epoxy coating or hardware fastening. After the resistor is open-circuited, the signal output disappears. Under the influence of the environment, the resistor heats up or shakes frequently. The resistor arrangement method of the prior art is very likely to produce stress concentration, affecting the heat dissipation efficiency of the resistor. The present invention is proposed.

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the influence of resistance heating and stress concentration on the transmission efficiency of the mutual inductor while avoiding the influence of the mutual inductor by the harsh external environment as much as possible.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a multi-spiral RC element voltage transformer, comprising a RC component, comprising a resistor cylinder, wherein the outer wall of the resistor cylinder is provided with a plurality of axially distributed spiral grooves, wherein a plurality of groups of resistor strings are embedded and arranged in the spiral grooves;

[0009] Both ends of the resistor string are provided with elastic leads;

[0010] A docking assembly comprises a first flange and a second flange fixedly connected to both ends of the resistor tube, and a capacitor lead is flexibly connected to the center position between the first flange and the second flange.

[0011] As a preferred solution of the multi-spiral RC element voltage transformer described in the present invention, the resistor strings are arranged alternately in the spiral grooves, one end of the resistor string is fixedly connected to the first flange or the second flange, and the other end is connected to the high-voltage bus U1 through the end of the resistor tube.

[0012] As a preferred solution of the multi-helical RC element voltage transformer of the present invention, wherein: a capacitor is fixedly mounted in the resistor cylinder through the first flange and the second flange;

[0013] The second flange and the top of the capacitor are provided with equipotential plates.

[0014] As a preferred solution of the multi-spiral RC element voltage transformer of the present invention, the first flange and the second flange are both provided with a conducting hole.

[0015] The first flange is further provided with an adjustment platform;

[0016] The adjusting platform adjusts the height of the resistor cylinder through a lead screw.

[0017] As a preferred solution of the multi-helical RC element voltage transformer of the present invention, an expansion joint is provided in the capacitor.

[0018] The beneficial effects of the present invention are as follows: the drawbacks of the electrical connection structure of resistors and capacitors in the prior art are overcome, and a method of fixing one end and limiting the other end and adding horizontal equipotential connection is provided, which improves the reliability of the electrical connection structure of resistors and capacitors, and the high-voltage resistor string with multiple spiral embedding and elastic lead design improves the stress adaptability and heat dissipation efficiency after the resistor is fixed. The design of equipotential plates, multi-channel series and parallel connection of connecting leads and multiple remote modules improves the reliability of voltage transformer measurement sampling and transmission.

[0019] In view of the DC voltage transformer of multi-helix RC element voltage transformer RC parallel voltage division technology, it is usually composed of a series of resistor elements connected in series and then connected in parallel with a voltage-equalizing capacitor. The specific DC voltage transformer schematic diagram is as follows Figure 1As shown. The measurement accuracy level and sampling frequency of 50kHz of the voltage transformer with low-frequency AC and DC voltage using this technology can meet the frequency response time required by the current DC voltage transformer engineering application, but for the measurement of higher-frequency harmonic voltage, the sampling frequency needs to be further improved. In addition, due to the mixed connection of multiple internal units, if one of the electrical connections fails, it will cause faults such as measured voltage distortion or internal insulation breakdown.

[0020] The sampling rate depends on the specific application scenario and requirements. An appropriate sampling rate can ensure signal quality and accuracy while reducing data volume, signal distortion and noise, and improving signal processing efficiency and accuracy. However, too high a sampling rate may increase the amount of data, thereby increasing the cost of signal processing and transmission, and may also cause signal distortion and increased noise. Therefore, if all measurement channels are designed with a high sampling rate, the accuracy of low-frequency signal measurement is difficult to guarantee, and the surge in data volume will also bring new problems such as reduced transmission reliability.

[0021] The voltage transformer of the RC hybrid voltage division technology is usually composed of a series of resistor elements and capacitor elements connected in series to form an RC capacitor, which is then connected in parallel with another series of resistor elements. The specific schematic diagram of the wide-band voltage transformer is as follows: Figure 2 The voltage transformer using this technology has higher harmonic withstand voltage and withstand frequency, but the structure is complex and the cost is too high.

[0022] The measurement requirements for DC voltage transformers in conventional UHV DC transmission, flexible DC transmission and other fields are mainly low-frequency AC, accurate DC voltage measurement and high-frequency voltage monitoring. The harmonic voltage of the DC transmission system is mainly low-frequency and low-amplitude, and there is no high requirement for harmonic tolerance. Therefore, if the DC voltage transformer with RC parallel voltage division technology can increase the sampling frequency, it can also achieve wide-band voltage measurement, and the voltage, current and signal transmission stability of the entire transformer will be optimized.

[0023] Therefore, the technical problem to be solved by the present invention is to design a circuit system with a wider sampling rate, higher efficiency and higher stability based on a transformer with high insulation reliability and high structural stability, combined with the existing resistor-capacitor parallel voltage division technology and resistor-capacitor mixed voltage division technology. At the same time, the status of the redundant backup channel is monitored in real time, which is convenient for reliable switching of the backup channel during on-site emergency repairs.

[0024] In order to solve the above technical problems, the present invention also provides the following technical solutions: a broadband transmission circuit, comprising the multi-spiral RC element voltage transformer, and a RC unit, which is composed of a plurality of RC elements connected in series;

[0025] Transformation unit, including low voltage arm and resistor box;

[0026] A screening unit, including a remote detection module and a collection module;

[0027] The acquisition module is connected in series with the remote detection module and is internally provided with a high-pass filter B and a wave recording device;

[0028] The resistor-capacitor unit is the resistor string arrayed around the resistor tube.

[0029] As a preferred solution of the broadband transmission circuit of the present invention, the resistor and capacitor elements are formed by connecting two resistors R1 and a capacitor C1 in parallel, and each of the resistor and capacitor elements are connected in series to form the resistor string;

[0030] The high-voltage end of the resistor string is electrically connected to the high-voltage bus U1, and the low-voltage end is electrically connected to the transformer unit through a shielded signal line.

[0031] As a preferred solution of the broadband transmission circuit of the present invention, the low-voltage arm comprises a plurality of resistors R2 and a capacitor C2 connected in parallel, and a varistor and a discharge tube are connected in series and connected in parallel with the capacitor C2 and the resistor R2;

[0032] The resistance box is formed by connecting a plurality of voltage-changing elements in parallel;

[0033] The voltage-changing element is formed by connecting a resistor R3 and a resistor R4 in series;

[0034] Through the quantitative resistance ratio, the initial voltage U0 is converted into the processing voltage U through the low voltage arm and the resistance box. s .

[0035] As a preferred solution of the broadband transmission circuit of the present invention, the voltage transformation elements are all connected in parallel with the remote detection module or the acquisition module.

[0036] As a preferred solution of the broadband transmission circuit of the present invention, the remote detection module receives the processing voltage U s After that, it enters the protection merging circuit e or the monitoring merging circuit f;

[0037] The acquisition module receives the processing voltage U s After that, enter the recording device and analyze the UHF signal data status.

[0038] As a preferred solution of the broadband transmission circuit of the present invention, wherein: the parallel resistance value of the low voltage arm capacitor C2 and the low voltage arm and the resistance box is R5;

[0039] The total resistance value R6 of the RC component;

[0040] The R5 and R6 are symmetrically matched with the total capacitance C3, that is, R5×C2=R6×C3.

[0041] The beneficial effects of the present invention are as follows: the difficulty of selecting the sampling frequency in the prior art is overcome, a method combining low-frequency sampling and high-frequency sampling is provided, the simultaneous measurement of wide-band AC voltage and DC voltage is realized, and a more efficient and wider measurement range stable circuit system is formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0043] Figure 1 It is a schematic diagram of the principle of parallel connection of resistors and capacitors of DC voltage transformer in the prior art;

[0044] Figure 2 The figure is a schematic diagram of the resistor-capacitor hybrid principle of a wide-frequency voltage transformer in the prior art.

[0045] Figure 3 A schematic structural diagram of a multi-spiral RC element voltage transformer according to an embodiment of the present invention;

[0046] Figure 4 A schematic diagram of a resistor string structure of a multi-spiral RC element voltage transformer according to an embodiment of the present invention;

[0047] Figure 5 A state diagram of a multi-spiral structure of a resistor string of a multi-spiral RC element voltage transformer according to an embodiment of the present invention;

[0048] Figure 6 A schematic diagram of the structure of a resistor-capacitor unit of a voltage transformer with a multi-spiral resistor-capacitor element according to an embodiment of the present invention;

[0049] Figure 7 A schematic diagram of the structure of a transformer unit of a multi-spiral RC element voltage transformer according to an embodiment of the present invention;

[0050] Figure 8 A schematic diagram of the circuit principle of a multi-spiral RC element voltage transformer according to an embodiment of the present invention;

[0051] Fig. 9 A schematic diagram of the principle of matching the resistor and capacitor elements, the low-voltage arm, and the resistor box according to an embodiment of the present invention.

[0052] In the figure: RC assembly 100; resistor tube 101; spiral groove 101a; resistor string 102; elastic lead 102b; docking assembly 200; first flange 201; second flange 202; capacitor lead 203; high-voltage busbar U1; capacitor 103; equipotential plate 204 on the top; conduction hole 202a; adjustment platform 202b; RC unit 300; RC element 301; transformer unit 400; low-voltage arm 401; resistor box 40 2; screening unit 500; remote detection module 501; acquisition module 502; high-pass filter B; resistor R1; capacitor C1; shielded signal line 600; resistor R2; capacitor C2; varistor 401a; discharge tube 401b; transformer 402a; resistor R3; resistor R4; protection merging circuit e; initial voltage U0; processing voltage Us; receiving processing voltage U; parallel resistance value R5; total resistance value R6; total capacitance C3. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0054] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0055] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0056] Furthermore, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0057] Example 1

[0058] Reference Figure 1 to Figure 4The present embodiment provides a multi-spiral RC element voltage transformer, including a RC component 100, which is a basic component unit of the transformer. The combination of multiple RC components 100 forms a working part of the transformer, including a resistor cylinder 101, and the outer wall of the resistor cylinder 101 is provided with multiple axially distributed spiral grooves 101a, the spiral grooves 101a are arranged on the resistor cylinder 101, and form multiple channels, multiple groups of resistor strings 102 are embedded in the spiral grooves 101a, and each group of resistor strings 102 is staggered in different spiral grooves 101a to form high-pitch series resistors, and the spacing is more uniform and better adjusted. The parallel design of multiple channels also increases the number of resistance measurement channels;

[0059] Furthermore, elastic leads 102b are provided at both ends of the resistor string 102. The elastic leads 102b can release stress through the contraction and elasticity of the spring after the resistor tube 101 is bent under force. The elastic leads 102b are at the ends to make the multi-channel resistor string more stably placed in the spiral groove 101a, thereby avoiding the contact between the resistor string 102 and the resistor tube 101 from being affected by the environment to the greatest extent possible.

[0060] Furthermore, the docking component 200, that is, the structural part for connecting a single RC component 100, includes a first flange 201 and a second flange 202 fixedly connected to both ends of the resistor tube 101. Both flanges are made of flexible material and have a certain toughness. In order to enhance the response of the entire transformer to severe weather and avoid direct damage to the connection between components due to rigid connection, a capacitor lead 203 is flexibly connected at the center between the first flange 201 and the second flange 202. The capacitor lead 203 consists of an insulating shell made of flexible material and multiple capacitor wires inside.

[0061] Example 2

[0062] Reference Figure 1 to Figure 4 , which is the second embodiment of the present invention. This embodiment is based on the previous embodiment and is different from the previous embodiment in that: the resistor string 102 is staggered in the spiral groove 101a to form a high spacing, one end of the resistor string 102 is fixedly connected to the first flange 201 or the second flange 202, and forms a stable state with the above structure, that is, the flexible flange is connected to the elastic lead 102b, and the other end is connected to the high-voltage busbar U1 through the end of the resistor tube 101 to form a complete electrical connection. The first flange 201 can be understood as Figure 3 The upper flange in the figure, the second flange 202 is the lower flange.

[0063] Furthermore, a capacitor 103 is fixedly arranged in the resistor tube 101 through the first flange 201 and the second flange 202. The capacitor 103 is a capacitor storage position, which is located in the center of the resistor tube 101.

[0064] The second flange 202 and the top of the capacitor 103 are provided with an equipotential plate 204 , so that the upper RC component 100 can form a complete electrical connection with other RC components 100 .

[0065] The first flange 201 and the second flange 202 are both provided with a conducting hole 202a, and the conducting hole 202a allows the copper foil circuits of different layers to be connected, thereby realizing the electrical connection between various components of the entire circuit state.

[0066] The first flange 201 is provided with an adjustment platform 202b, which can change the height of the resistor tubes 101 on both sides. According to the weather conditions, the potential difference formed at both ends can be adjusted. The uniform pressure difference at both ends can make the potential distribution more uniform.

[0067] The design of multiple spiral channels connects multiple resistor strings 102 in parallel. The high spacing improves the heat dissipation efficiency of the resistor string 102, increases the number of resistance measurement channels, enhances the efficiency and stability of resistance measurement information transmission, avoids the fault tolerance of a single channel, and further improves the reliability of the product under reciprocating impact stress in extreme weather conditions.

[0068] The adjusting table 202b adjusts the height of the resistor tube 101 through a screw, and an expansion joint is provided inside the capacitor 103, which is also an adaptive adjustment for the structure in an external environment. After the resistor and capacitor are connected in parallel, there is often a large potential voltage difference at the end or in the middle. When the external contamination level of the product is high, the electric field distribution will deteriorate. If the insulation design margin is insufficient, internal insulation breakdown or external flashover and other faults are very likely to occur. Therefore, the internal insulating medium is used, and the expansion joint expands and contracts to adjust the stress to avoid faults.

[0069] Example 3

[0070] Reference Figures 1 to 8 , which is the third embodiment of the present invention, and provides a broadband transmission circuit. This embodiment is based on the previous embodiment, and is different from the previous embodiment in that:

[0071] Furthermore, the RC unit 300 is formed by connecting a plurality of RC elements 301 in series. The RC element 301 can be understood as a single RC component 100 in the transformer, which is connected by leads in the circuit, and the flange and other related connection parts of the above structural parts are omitted;

[0072] The transformer unit 400 includes a low voltage arm 401 and a resistor box 402. Both the low voltage arm 401 and the resistor box 402 are necessary modules for converting high voltage into low voltage. After the low voltage arm is connected in parallel with the resistor box, the low voltage signal is transmitted to the subsequent circuit.

[0073] The screening unit 500 includes a remote detection module 501 and a collection module 502. The low voltage signal is transmitted from the resistor box to multiple remote detection modules 501 and collection modules 502. The remote detection module 501 is provided with a low-pass filter A and an A / D conversion, and the collection module 502 is provided with a high-pass filter B and an A / D conversion.

[0074] The RC element 301 is formed by connecting two resistors R1 and a capacitor C1 in parallel, combining the characteristics of the RC parallel voltage division technology and the RC mixed voltage division technology in the prior art to form an RRC resistor element, forming a higher withstand frequency. Each RC element 301 is connected in series to form a resistor string 102;

[0075] The high-voltage end of the resistor string 102 is electrically connected to the high-voltage bus U1, and the low-voltage end is electrically connected to the transformer unit 400 through the shielded signal line 600. Generally speaking, the shielded signal line 600 is connected to the signal input end of the low-voltage arm 401, and the signal output end of the low-voltage arm 401 is connected to the signal input end of the resistor box 402. After the low-voltage arm 401 and the resistor box 402 are connected, they are electrically connected in parallel.

[0076] Example 4

[0077] Reference Figures 1 to 9 , which is the fourth embodiment of the present invention, and is based on the previous embodiment, and is different from the previous embodiment in that: the low-voltage arm 401 includes a plurality of resistors R2 and a capacitor C2 connected in parallel, and a varistor 401a and a discharge tube 401b are connected in series and then connected in parallel with the capacitor C2 and the resistor R2;

[0078] The resistance box 402 is formed by connecting a plurality of voltage-transforming elements 402a in parallel;

[0079] The voltage transformation element 402a is formed by connecting a resistor R3 and a resistor R4 in series;

[0080] The signal output end of the resistor box 402 is connected to the signal input end of the remote detection module 501. The resistor box 402 is provided with a plurality of signal output branches and is connected to a plurality of remote detection modules 501. The signal output ends of some remote detection modules 501 are connected to the protection combining circuit e for access control protection.

[0081] The other part of the remote detection module 501 is also connected to the protection merging circuit e, but is finally connected to the monitoring equipment and does not participate in the work. Its main function is to ensure that the hot standby channel is reliable and can quickly switch to the standby if there is a fault. The requirements for the assessment of the power outage time of UHV DC are relatively high. For example, in the case of three-out-of-two, if one component fails, the protection will not work. The faulty one will be switched to the reliable standby and continue to operate. If a power outage is carried out directly for maintenance, the power loss will be extremely large. On the premise that the standby channel can work normally, targeted processing will be carried out during the maintenance period. If the standby is not monitored, its intact state cannot be guaranteed;

[0082] The acquisition module 502 is connected to the recording device as a broadband acquisition device. Its high-pass filter B is dedicated to the transmission and measurement of high-frequency AC voltage. The transmission and measurement signals of high-frequency AC voltage are transmitted to the recording device to realize the monitoring of high-frequency harmonic voltage. The low-frequency and high-frequency sampling rates are set in stages and designed for different purposes without interfering with each other, thereby achieving the effect of accurate measurement of low-frequency AC and DC voltages and simultaneous measurement of high-frequency voltages, saving the cost of signal processing and transmission increased by excessively high sampling rates, and improving the measurement frequency range of DC voltage transformers.

[0083] Through the quantitative resistance ratio, the initial voltage U0 is converted into the processing voltage U through the low voltage arm 401 and the resistance box 402. s , process voltage U s Compared with the initial voltage U0, it is lower and more suitable for high-frequency acquisition work. It can also perform normal signal transmission work through adjustment.

[0084] The remote detection module 501 analyzes the normal signal transmission voltage and mainly receives low-frequency signals.

[0085] Acquisition module 502, receives and processes voltage U s After that, enter the recording device, analyze the UHF signal data status, and resolve the high frequency signal problem.

[0086] On the other hand, the varistor 401a and the discharge tube 401b of the present invention have an overvoltage protection function for the secondary end devices such as the low voltage arm 401 and the resistor box 402; according to the transmission voltage U of the low voltage arm under the rated voltage s value, press U s The measurement range of the voltage transformer is designed as a multiple of . If the breakdown voltage of the discharge tube 401b is exceeded, the varistor 401a is turned on to achieve overvoltage protection at the secondary end.

[0087] Example 5

[0088] Reference Figures 1 to 9, which is the fifth embodiment of the present invention, and this embodiment is based on the previous embodiment, and is different from the previous embodiment in that: the parallel resistance value of the capacitor C2 of the low voltage arm 401 and the low voltage arm 401 and the resistance box 402 is R5;

[0089] The total resistance value of the RC component 100 is R6;

[0090] R5 and R6 are symmetrically matched with the total capacitance C3, that is, R5×C2=R6×C3;

[0091] The above mentioned resistor and capacitor relationships match each other to form a complete circuit logic;

[0092] On the other hand, the present invention can flexibly adjust the overall length of the product by adjusting the number of resistors and capacitors, thereby improving the versatility of the resistors and capacitors and being applicable to DC voltage transformers of different voltage levels.

[0093] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0094] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0095] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0096] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. Multi-helix RC element voltage transformer, characterized in that: include, A resistor-capacitor assembly (100) comprises a resistor tube (101), the outer wall of the resistor tube (101) being provided with a plurality of axially distributed spiral grooves (101a), and a plurality of groups of resistor strings (102) being embedded and arranged in the spiral grooves (101a); Both ends of the resistor string (102) are provided with elastic leads (102b); A docking assembly (200) comprises a first flange (201) and a second flange (202) fixedly connected to both ends of the resistor tube (101), wherein a capacitor lead (203) is flexibly connected at a center position between the first flange (201) and the second flange (202).

2. The multi-helical RC element voltage transformer according to claim 1, characterized in that: The resistor strings (102) are arranged in a staggered manner in the spiral groove (101a); one end of the resistor string (102) is fixedly connected to the first flange (201) or the second flange (202); and the other end is connected to the high-voltage busbar U1 through the end of the resistor tube (101).

3. The multi-helical RC element voltage transformer according to claim 2, characterized in that: A capacitor (103) is fixedly mounted in the resistor cylinder (101) via the first flange (201) and the second flange (202); The second flange (202) and the top of the capacitor (103) are provided with an equipotential plate (204).

4. The multi-helical RC element voltage transformer according to claim 3, characterized in that: The first flange (201) and the second flange (202) are both provided with a through hole (202a) An adjustment platform (202b) is further provided on the first flange (201); The adjustment platform (202b) adjusts the height of the resistor tube (101) via a lead screw.

5. The multi-helical RC element voltage transformer according to claim 4, characterized in that: An expansion joint is provided inside the capacitor (103).

6. A broadband transmission circuit, characterized in that: A multi-helical RC element voltage transformer comprising any one of claims 1 to 5, and The resistor-capacitor unit (300) is formed by connecting a plurality of resistor-capacitor elements (301) in series; A voltage transformation unit (400) comprises a low voltage arm (401) and a resistance box (402); The screening unit (500) comprises a remote detection module (501) and a collection module (502); The acquisition module (502) is connected in series with the remote detection module and is internally provided with a high-pass filter B and a wave recording device; The resistor-capacitor unit (300) is the resistor string (102) arrayed around the resistor tube (101).

7. The broadband transmission circuit according to claim 6, characterized in that: The resistor and capacitor element (301) is formed by connecting two resistors R1 and one capacitor C1 in parallel, and each of the resistor and capacitor elements (301) is connected in series to form the resistor string (102); The high-voltage end of the resistor string (102) is electrically connected to the high-voltage bus U1, and the low-voltage end is electrically connected to the transformer unit (400) via a shielded signal line (600).

8. The broadband transmission circuit according to claim 7, characterized in that: The low-voltage arm (401) comprises a plurality of resistors R2 and a capacitor C2 connected in parallel, and a varistor (401a) and a discharge tube (401b) are connected in series and then connected in parallel with the capacitor C2 and the resistor R2; The resistance box (402) is formed by connecting a plurality of voltage-changing elements (402a) in parallel; The voltage-changing element (402a) is composed of a resistor R3 and a resistor R4 connected in series; The initial voltage U0 is converted into a processing voltage U0 through the low voltage arm (401) and the resistance box (402) by a quantitative resistance ratio. s .

9. The broadband transmission circuit according to claim 8, characterized in that: The voltage transformation elements (402a) are connected in parallel to the remote detection module (501) or the acquisition module (502).

10. The broadband transmission circuit according to claim 9, characterized in that: The remote detection module (501) receives the processing voltage U s After that, it enters the protection merging circuit e or the monitoring merging circuit f; The acquisition module (502) receives the processing voltage U s After that, enter the recording device and analyze the UHF signal data status.

11. The broadband transmission circuit according to claim 6, characterized in that: The parallel resistance value R5 of the capacitor C2 of the low voltage arm (401) and the low voltage arm (401) and the resistance box (402); The total resistance value R6 of the resistor-capacitor component (100); The parallel resistance value R5 and the total resistance value R6 are symmetrically matched with the total capacitance C3, that is, R5×C2=R6×C3.

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