Data acquisition device and electric energy dynamic balance control system

Abstract

The utility model discloses a data acquisition device and an electric energy dynamic balance control system, which comprise a base shell, a plurality of groups of connecting seats and a current sensor are arranged on the base shell, a shielding shell wrapping the periphery of the current sensor is arranged in the base shell, and the shielding shell abuts against two sides of the current sensor. A wire of the connecting seat axially passes through the current sensor and the shielding shell. According to the data acquisition device and the electric energy dynamic balance control system provided by the utility model, the shielding shell is used for covering the peripheral side of the single group of current sensors, and the shielding shell is made of metal, so that relative magnetic field shielding and separation among the plurality of groups of current sensors are realized by using the shielding shell; the problem of data errors caused by mutual interference of multiple groups of current sensors and wires is avoided, the data acquisition accuracy is improved, and the shielding shell abuts against the two sides of the current sensors to improve the fixing stability of the current sensors.

Description

Technical Field

[0001] The utility model relates to the technical field of data acquisition devices, and more specifically to a data acquisition device and an electric energy dynamic balance control system. Background Art

[0002] In photovoltaic power generation equipment, photovoltaic data acquisition equipment is often used to collect and analyze current data in photovoltaic power generation circuits to ensure the stable operation of photovoltaic power generation equipment.

[0003] According to the patent with the publication number CN218547311U and the publication date: February 28, 2023, a disclosed 5G communication-based photovoltaic data acquisition device includes a data acquisition module, a main control module, a power supply module, and a transmission module installed on a busbar box. The data acquisition module, the main control module, and the transmission module are connected in sequence, and the power supply module is respectively connected to the data acquisition module, the main control module, and the transmission module. The data acquisition module includes a number of front-end Hall sensors for collecting current and voltage in the circuit. The circuit connected to the busbar box first passes through the front-end Hall sensors and then is connected to the busbar box. The data collected by the data acquisition module is processed by the main control module and then output through the transmission module; the data acquisition module includes a number of front-end Hall sensors, and the circuit connected to the busbar box first passes through the front-end Hall sensors and then is connected to the busbar box; it is transmitted to a mobile terminal or a display system in the central control room through a 5G communication module via the field wireless network, thus completing the acquisition of real-time operation data of the photovoltaic string.

[0004] In the prior art including the above patent, Hall sensors are used in the photovoltaic data acquisition device to detect the circuit data of the circuit cable. However, there are multiple parallel cable paths on the photovoltaic data acquisition device. When multiple parallel paths are operating simultaneously, the magnetic fields generated by the adjacent cables are likely to cause mutual interference, resulting in errors in the measurement data of the Hall sensors. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a data acquisition device and an electric energy dynamic balance control system to solve the above problems.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A data acquisition device includes a base shell, on which multiple groups of connection seats and current sensors are arranged. A shielding shell is arranged inside the base shell and wraps around the periphery of the current sensor. The shielding shell abuts against both sides of the current sensor, and the wire of the connection seat axially passes through the current sensor and the shielding shell.

[0007] Preferably, a protective ring sleeve is arranged on the shielding shell and sleeved on the wire. An insulating ring is arranged on the protective ring sleeve, and the insulating ring is located between the connection seat and the shielding shell.

[0008] Preferably, a communication cavity communicating with the outer side of the shielding shell is formed on the inner ring side of the protective ring sleeve, and a partially spiral shielding piece is arranged in a circumferential array at the first end of the protective ring sleeve to shield the communication cavity.

[0009] Preferably, the protective ring sleeve is rotatably arranged on the shielding shell, an inclined ring slope is arranged on the protective ring sleeve, the lower end of the inclined ring slope faces the first end of the protective ring sleeve, scraping plates abutting against the inner ring detection surface of the current sensor are arranged in a circumferential array on the inclined ring slope, dropping through grooves communicating with the communication cavity are formed in a circumferential array on the protective ring sleeve, and the heat insulation ring extends to the outside of the base shell.

[0010] Preferably, one end of the dropping through groove communicating with the communication cavity is a narrow opening, and one end of the dropping through groove facing away from the wire is a wide opening.

[0011] An electric energy dynamic balance control system includes the data acquisition device in the above technical solution.

[0012] In the above technical solution, a data acquisition device and an electric energy dynamic balance control system provided by the present utility model have the following beneficial effects: the shielding shell is used to cover the periphery of a single group of current sensors, and the shielding shell is made of metal. Therefore, the shielding shell is used to achieve relative magnetic field shielding and separation between multiple groups of current sensors, avoiding the problem of data errors caused by mutual interference between multiple groups of current sensors and wires, improving the accuracy of data acquisition. Secondly, the shielding shell abuts against both sides of the current sensor to improve the fixing stability of the current sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0014] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present utility model;

[0015] Figure 2 It is a schematic cross-sectional view of the overall structure provided by an embodiment of the present utility model;

[0016] Figure 3 It is an exploded structural schematic diagram of a current sensor, a shielding shell, and a connecting seat provided by an embodiment of the present utility model;

[0017] Figure 4 It is a schematic structural diagram of a protective ring sleeve provided by an embodiment of the present utility model;

[0018] Figure 5Provided by the embodiment of the present utility model Figure 2 The partial enlarged schematic diagram at position A in

[0019] Explanation of reference numerals:

[0020] 1. Base shell; 2. Connection seat; 21. Conducting wire; 3. Current sensor; 4. Shielding shell; 5. Protective ring sleeve; 51. Heat insulation ring; 52. Inclined ring slope; 521. Scraping plate; 53. Dropping through slot; 54. Rotating part; 541. Shielding piece; 55. Communication cavity. Detailed implementation manners

[0021] In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Apparently, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0022] As Figures 1-5 shown, a data acquisition device and an electric energy dynamic balance control system include a base shell 1, on which multiple groups of connection seats 2 and current sensors 3 are arranged. A shielding shell 4 is arranged inside the base shell 1 and wraps around the periphery of the current sensor 3. The shielding shell 4 abuts against both sides of the current sensor 3. The conducting wire 21 of the connection seat 2 axially passes through the current sensor 3 and the shielding shell 4.

[0023] Specifically, as Figure 1 shown, multiple groups of connection seats 2 are arranged in a linear array on the base shell 1. As Figure 2 shown, multiple groups of current sensors 3 and shielding shells 4 are also arranged in a linear array inside the base shell 1. The conducting wire 21 of the connection seat 2 passes through the current sensor 3, and then the current data passing through the conducting wire 21 is collected through the current sensor 3. The shielding shell 4 covers the periphery of a single group of current sensors 3, and the shielding shell 4 is made of metal. Therefore, the relative magnetic field shielding and separation between multiple groups of current sensors 3 are realized by using the shielding shell 4, avoiding the problem of data errors caused by mutual interference between multiple groups of current sensors 3 and conducting wires 21, and improving the accuracy of data acquisition. Secondly, as Figure 2 shown, the shielding shell 4 abuts against both sides of the current sensor 3 to improve the fixing stability of the current sensor 3. In the actual application process, the power generation system adjusts the input power to match the continuously changing output power, so that the energy pool of electric energy is dynamically maintained at a given level. This imbalance between input and output will be reflected in the frequency of the power grid. If the input is relatively faster than the output, the frequency will rise; otherwise, it will fall. Therefore, the power generation system monitors the power grid frequency for balance adjustment to ensure the stable operation of the power system.

[0024] Among them, the specific working principle and electrical connection of the current sensor 3 are common technical knowledge for those skilled in the art, and will not be elaborated here.

[0025] In the above technical solution, the shielding case 4 is used to cover the periphery of the single-group current sensor 3, and the shielding case 4 is made of metal. Furthermore, the shielding case 4 is used to achieve relative magnetic field shielding and separation between multiple groups of current sensors 3, avoiding the problem of data errors caused by mutual interference between multiple groups of current sensors 3 and the wire 21, improving the accuracy of data acquisition. Secondly, the shielding case 4 abuts against both sides of the current sensor 3 to improve the fixing stability of the current sensor 3.

[0026] As a further embodiment provided by the present utility model, a protective ring sleeve 5 sleeved on the wire 21 is provided on the shielding case 4, and a heat insulation ring 51 is provided on the protective ring sleeve 5, and the heat insulation ring 51 is located between the connecting seat 2 and the shielding case 4.

[0027] Specifically, as Figure 2 shown, the heat insulation ring 51 of the protective ring sleeve 5 is located between the connecting seat 2 and the shielding case 4. Since the heat generation at the end seat connection position of the connecting seat 2 is relatively large during the process of photovoltaic power generation, using the heat insulation ring 51 to separate the connecting seat 2 and the shielding case 4 can reduce the heat transfer to the shielding case 4, resulting in the detection data curve of the current sensor 3 drifting due to unexpected temperature changes, further improving the accuracy of current data acquisition. Among them, the direct contact between the shielding case 4 and the current sensor 3 can also play a role in dissipating heat from the current sensor 3.

[0028] As a further embodiment provided by the present utility model, a communication cavity 55 communicating with the outside of the shielding case 4 is opened on the inner ring side of the protective ring sleeve 5, and a partially spiral shielding piece 541 is arranged in a circumferential array at the first end of the protective ring sleeve 5 to shield the communication cavity 55.

[0029] Specifically, as Figure 2 shown, a communication cavity 55 communicating with the outside of the shielding case 4 is opened on the inner ring side of the protective ring sleeve 5. During the process of photovoltaic power generation, the wire 21 also generates heat due to the passing of current. The communication cavity 55 is used to enable the heat generated by the wire 21 to be directly discharged to the outside of the shielding case 4 along the gaps between the shielding pieces 541, thereby further avoiding the problem of detection data errors caused by the current sensor 3 being interfered by temperature. Secondly, the shielding piece 541 is partially spiral to shield the opening of the communication cavity 55, which not only facilitates the discharge of the heat of the wire 21, but also prevents external dust or debris from falling into the communication cavity 55.

[0030] As a further embodiment provided by the present utility model, the protective ring sleeve 5 is rotatably arranged on the shielding case 4. An inclined ring slope 52 is arranged on the protective ring sleeve 5. The low end of the inclined ring slope 52 faces the first end of the protective ring sleeve 5. Scraping plates 521 that abut against the inner ring detection surface of the current sensor 3 are arranged in a circumferential array on the inclined ring slope 52. Drop-through grooves 53 that communicate with the communication cavity 55 are arranged in a circumferential array on the protective ring sleeve 5. The heat insulation ring 51 extends to the outside of the base case 1.

[0031] Specifically, as Figure 4 shown, the protective ring sleeve 5 is rotatably arranged on the shielding case 4 through a rotating part 54. The right end of the protective ring sleeve 5 is the first end. An inclined ring slope 52 and drop-through grooves 53 are arranged on the protective ring sleeve 5. When the protective ring sleeve 5 is driven to rotate through the heat insulation ring 51, the scraping plates 521 rotate to scrape the inner ring detection surface of the current sensor 3, thereby scraping off the impurities magnetically adsorbed on the inner ring detection surface of the current sensor 3. The scraped impurities fall into the communication cavity 55 along the inclined ring slope 52 and the drop-through grooves 53. During the rotation of the protective ring sleeve 5, a plurality of shielding sheets 541 also rotate to drive the gas in the communication cavity 55 to flow out of the shielding case 4, thereby blowing the impurities in the communication cavity 55 out of the shielding case 4, completing the cleaning of the inner ring detection surface of the current sensor 3, and further improving the data acquisition accuracy of the current sensor 3.

[0032] As a further embodiment provided by the present utility model, one end of the drop-through groove 53 communicating with the communication cavity 55 is a narrow opening, and the end of the drop-through groove 53 facing away from the wire 21 is a wide opening.

[0033] Specifically, one end of the drop-through groove 53 communicating with the communication cavity 55 is a narrow opening, and the end of the drop-through groove 53 facing away from the wire 21 is a wide opening, so that while facilitating the dust scraped off from the current sensor 3 to fall into the communication cavity 55, it can also reduce the reverse fall of the dust in the communication cavity 55 into the shielding case 4, improving the operation stability of the device.

[0034] Only some exemplary embodiments of the present utility model have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present utility model, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present utility model.

Claims

1. A data acquisition device, characterized in that: The invention comprises a base shell (1) on which a plurality of groups of connection seats (2) and current sensors (3) are arranged, wherein a shielding shell (4) wrapped around the circumference of the current sensor (3) is arranged inside the base shell (1), wherein the shielding shell (4) contacts the two sides of the current sensor (3), and the wire (21) of the connection seat (2) axially passes through the current sensor (3) and the shielding shell (4).

2. A data acquisition device according to claim 1, characterized in that: The shielding shell (4) is provided with a protective ring sleeve (5) sleeved on the wire (21), the protective ring sleeve (5) is provided with a heat insulating ring (51), and the heat insulating ring (51) is located between the connecting seat (2) and the shielding shell (4).

3. A data acquisition device according to claim 2, characterized in that: The inner ring side of the protective ring sleeve (5) is provided with a connecting cavity (55) communicating with the outer side of the shielding shell (4), and the first end circumferential array of the protective ring sleeve (5) has a partially spiral shielding piece (541) to shield the connecting cavity (55).

4. A data acquisition device according to claim 3, characterized in that: The protective ring sleeve (5) is rotatably mounted on the shielding shell (4); an inclined ring slope (52) is arranged on the protective ring sleeve (5); the lower end of the inclined ring slope (52) faces the first end of the protective ring sleeve (5); a scratch plate (521) is arranged in a circumferential array on the inclined ring slope (52) and contacts the inner ring detection surface of the current sensor (3); a drop-through groove (53) connected to the connecting cavity (55) is arranged in a circumferential array on the protective ring sleeve (5); and the heat insulation ring (51) extends to the outside of the base shell (1).

5. A data acquisition device according to claim 4, characterized in that: The end of the falling through groove (53) communicating with the connecting cavity (55) is a narrow opening, and the end of the falling through groove (53) facing away from the wire (21) is a wide opening.

6. An electric energy dynamic balance control system, characterized in that: The data acquisition device comprises any one of claims 1 to 5.

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