Alternating current test loop for simulating actual working condition of power grid operation

Abstract

The utility model relates to the technical field of intelligent power grids, and discloses an alternating current test loop for simulating actual operating conditions of a power grid, which is formed by sequentially connecting a gas insulated metal-enclosed switchgear in series with a current transformer device and a current rising device. The current transformer device controls the through-current capability of the current rising device in the power equipment in the loop, improves the current data monitoring capability of the power equipment, can monitor the current data of the power equipment in real time, and feeds back the current data to the terminal, thereby solving the actual problems of the current loop, effectively monitoring the current data change trend of the power equipment, and improving the safety of the power equipment. Factors disturbing normal operation of the current loop are analyzed according to a large amount of collected test data.

Description

Technical Field

[0001] The utility model relates to the technical field of smart grid, and particularly relates to an alternating current test circuit for simulating the actual working conditions of power grid operation. Background Art

[0002] With the rapid development of smart grid, how to ensure the continuous and reliable operation of the power grid has attracted more and more attention. The continuous and safe operation of power equipment in the power grid system is the key. How to effectively monitor the current change of power equipment is the core issue concerned by power companies and also an important research direction of power equipment testing institutions.

[0003] The existing detection technologies such as temperature rise test can only monitor the current-carrying capacity of power equipment for a short time, and it is difficult to find the problems that occur during the actual operation of power equipment in the power grid system because there are significant differences between the test layout and the actual operating conditions of power equipment. Content of the Utility Model

[0004] In order to overcome the defects existing in the above-mentioned prior art, the purpose of the utility model is to provide an alternating current test circuit for simulating the actual working conditions of power grid operation, so as to solve the technical problem of how to monitor the current loop in the prior art.

[0005] The utility model is realized by the following technical solutions:

[0006] The utility model provides an alternating current test circuit for simulating the actual working conditions of power grid operation, which includes a gas-insulated metal-enclosed switchgear, a current transformer device, and a current boosting device;

[0007] One end of the gas-insulated metal-enclosed switchgear is connected to one end of the current transformer device, and the other end of the current transformer device passes through the current boosting device and is connected to the other end of the gas-insulated metal-enclosed switchgear to form a test return structure.

[0008] Preferably, one end of the gas-insulated metal-enclosed switchgear is connected to the current transformer device through a first unit connection line, and a first test bushing is provided on the first unit connection line.

[0009] Furthermore, the first unit connection line includes a first overhead connection line and a first test bus; one end of the gas-insulated metal-enclosed switchgear is connected to one end of the first test bushing through the first overhead connection line, and the other end of the first test bushing is connected to the current transformer device through the first test bus.

[0010] Preferably, the other end of the current transformer device passes through the current boosting device and is connected to the other end of the gas-insulated metal-enclosed switchgear through a second unit connection line, and a second test bushing is provided on the second unit connection line.

[0011] Further, the second unit connection line includes a second overhead connection line, a second test busbar, and a third test busbar; the other end of the current transformer device is connected to the third test busbar, the third test busbar passes through the current boosting device and is connected to one end of the second test busbar, the other end of the second test busbar is connected to one end of the second test bushing, and the other end of the second test bushing is connected to the other end of the gas-insulated metal-enclosed switchgear through the second overhead connection line.

[0012] Furthermore, the current boosting device is provided with a through-hole, and the third test busbar passes through the through-hole and is connected to one end of the second test busbar.

[0013] Furthermore, the diameter of the third test busbar is smaller than the aperture of the through-hole of the current boosting device.

[0014] Preferably, the current transformer device includes a control and acquisition device and a current transformer; the main circuit of the current transformer is connected to the gas-insulated metal-enclosed switchgear, the acquisition circuit of the current transformer is connected to the control and acquisition device, one end of the control and acquisition device is connected to the control device, and the other end is connected to the current boosting device for controlling and acquiring the current signal of the current boosting device.

[0015] Preferably, the current boosting device includes a current booster, a power supply, and a voltage regulator; wherein, the power supply is connected to the input end of the voltage regulator through a cable; the output end of the voltage regulator is connected to the current booster through a cable.

[0016] Further, the current boosting device further includes a compensation capacitor, and the compensation capacitor is arranged in parallel with the output end of the voltage regulator.

[0017] Compared with the prior art, the utility model has the following beneficial technical effects:

[0018] The utility model provides an alternating current test circuit for simulating the actual working conditions of power grid operation. By sequentially connecting a gas-insulated metal-enclosed switchgear in series with a current transformer device and a current boosting device to form a current test circuit, the current boosting device is controlled by the current transformer device to increase the current-carrying capacity of power equipment in the circuit, improve the current data monitoring ability of power equipment, be able to monitor the current data of power equipment in real time, and feedback it to the terminal, so as to solve the actual problems occurring in the current circuit, effectively monitor the change trend of the current data of power equipment, and analyze the factors interfering with the normal operation of the current circuit according to a large amount of collected test data.

[0019] Further, one end of the gas-insulated metal-enclosed switchgear is connected to the current transformer device through a first unit connecting wire. A first test bushing is provided on the first unit wire. The first unit connecting wire includes a first overhead connecting wire and a first test bus. One end of the gas-insulated metal-enclosed switchgear is connected to one end of the first test bushing through the first overhead connecting wire, and the other end of the first test bushing is connected to the current transformer device through the first test bus, facilitating the flow of current and improving the real-time monitoring of the current transformer device for the current flow.

[0020] Further, the other end of the current transformer device passes through a current boosting device through a second unit connecting wire and is connected to the other end of the gas-insulated metal-enclosed switchgear. A second test bushing is provided on the second unit connecting wire, enabling the current transformer device to collect data on the flowing current by controlling the current boosting device, facilitating the monitoring of the current data of the power equipment.

[0021] Further, the current transformer device includes a control and acquisition device and a current transformer. The main circuit of the current transformer is connected to the gas-insulated metal-enclosed switchgear, and the acquisition circuit of the current transformer is connected to the control and acquisition device. One end of the control and acquisition device is connected to the control device, and the other end is connected to the current boosting device, used to control and acquire the current signal of the current boosting device, real-time monitor the current data of the power equipment, and feedback it to the terminal to establish a current loop database in the terminal, and solve the actual problems that occur in the current loop by analyzing the database.

[0022] Further, the current boosting device includes a current booster, a power supply, and a voltage regulator. Among them, the power supply is connected to the input end of the voltage regulator through a cable; the output end of the voltage regulator is connected to the current booster through a cable. The current boosting device further includes a compensation capacitor, and the compensation capacitor is connected in parallel with the output end of the voltage regulator. The method of parallel compensation capacitor can effectively improve the power factor of the current loop with a large capacitance of the test sample. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the AC current test loop in the present invention;

[0024] Figure 2 It is a schematic structural diagram of the current transformer device in the present invention;

[0025] Figure 3 It is a schematic structural diagram of the current boosting device in the present invention;

[0026] Figure 4 It is a schematic diagram of the working principle of the AC current test loop in the present invention;

[0027] In the figure: 1 - Gas-insulated metal-enclosed switchgear; 2 - First overhead connecting line; 3 - First test bushing; 4 - First test bus; 5 - Current transformer device; 6 - Current increasing device; 7 - Control and acquisition device; 8 - Current transformer; 9 - Current increaser; 10 - Power supply; 11 - Second overhead connecting line; 12 - Second test bushing; 13 - Second test bus; 14 - Third test bus; 15 - First unit connecting line; 16 - Second unit connecting line; T - Voltage regulator; C - Compensation capacitor. Specific embodiments

[0028] In order to enable those skilled in the art of the present technology to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0029] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, products or devices.

[0030] The following further describes the present utility model in detail with reference to the accompanying drawings:

[0031] The purpose of the present utility model is to provide an alternating current test circuit that simulates the actual working conditions of power grid operation, so as to solve the technical problem of how to monitor the current circuit in the prior art.

[0032] Embodiment 1

[0033] See Figure 1 , in an embodiment of the present utility model, an alternating current test circuit that simulates the actual working conditions of power grid operation is provided, including a gas-insulated metal-enclosed switchgear 1, a current transformer device 5, and a current increasing device 6;

[0034] One end of the gas-insulated metal-enclosed switchgear 1 is connected to one end of the current transformer device 5, and the other end of the current transformer device 5 passes through the current boosting device 6 and is connected to the other end of the gas-insulated metal-enclosed switchgear 1, forming a test return structure.

[0035] Specifically, one end of the gas-insulated metal-enclosed switchgear 1 is connected to the current transformer device 5 through the first unit connection line 15, and the first test bushing 3 is provided on the first unit line.

[0036] Among them, the first unit connection line 15 includes a first overhead connection line 2 and a first test bus 4; one end of the gas-insulated metal-enclosed switchgear 1 is connected to one end of the first test bushing 3 through the first overhead connection line 2, and the other end of the first test bushing 3 is connected to the current transformer device 5 through the first test bus 4.

[0037] In this embodiment, one end of the gas-insulated metal-enclosed switchgear 1 is connected to one end of the first test bushing 3 through the first overhead connection line 2, and the other end of the first test bushing 3 is connected to the current transformer device 5 through the first test bus 4, which facilitates the flow of current and improves the real-time monitoring of the current transformer device on the current flow.

[0038] Embodiment 2

[0039] See Figure 1 , in an embodiment of the present invention, an AC current test circuit for simulating the actual working conditions of the power grid operation is provided, including a gas-insulated metal-enclosed switchgear 1, a current transformer device 5, and a current boosting device 6;

[0040] One end of the gas-insulated metal-enclosed switchgear 1 is connected to one end of the current transformer device 5, and the other end of the current transformer device 5 passes through the current boosting device 6 and is connected to the other end of the gas-insulated metal-enclosed switchgear 1, forming a test return structure.

[0041] Specifically, the other end of the current transformer device 5 passes through the current boosting device 6 through the second unit connection line 16 and is connected to the other end of the gas-insulated metal-enclosed switchgear 1, and the second test bushing 12 is provided on the second unit connection line 16.

[0042] Among them, the second unit connection line 16 includes a second overhead connection line 11, a second test bus 13, and a third test bus 14; the other end of the current transformer device 5 is connected to the third test bus 14, the third test bus 14 passes through the current boosting device 6 and is connected to one end of the second test bus 13, the other end of the second test bus 13 is connected to one end of the second test bushing 12, and the other end of the second test bushing 12 is connected to the other end of the gas-insulated metal-enclosed switchgear 1 through the second overhead connection line 11.

[0043] Specifically, the current boosting device 6 is provided with a through hole, and the third test busbar 14 passes through the through hole and is connected to one end of the second test busbar 13.

[0044] Wherein, the diameter of the third test busbar 14 is smaller than the aperture of the through hole of the current boosting device 6.

[0045] In this embodiment, the other end of the current transformer device 5 passes through the current boosting device 6 through the second unit connection line 16 and is connected to the other end of the gas-insulated metal-enclosed switchgear 1. A second test bushing 12 is provided on the second unit connection line 16, so that the current transformer device 5 collects the data of the flowing current by controlling the current boosting device 6, which is convenient for monitoring the current data of the power equipment.

[0046] Embodiment 3

[0047] See Figure 1 , in an embodiment of the present utility model, an AC current test circuit for simulating the actual working conditions of the power grid operation is provided, including a gas-insulated metal-enclosed switchgear 1, a current transformer device 5 and a current boosting device 6;

[0048] One end of the gas-insulated metal-enclosed switchgear 1 is connected to one end of the current transformer device 5, and the other end of the current transformer device 5 passes through the current boosting device 6 and is connected to the other end of the gas-insulated metal-enclosed switchgear 1 to form a test return structure.

[0049] Specifically, as shown in Figure 2 , the current transformer device 5 includes a control and acquisition device 7 and a current transformer 8; the main circuit of the current transformer 8 is connected to the gas-insulated metal-enclosed switchgear 1, the acquisition circuit of the current transformer is connected to the control and acquisition device 7, and one end of the control and acquisition device 7 is connected to the control device, and the other end is connected to the current boosting device 6 for controlling and acquiring the current signal of the current boosting device 6.

[0050] Specifically, as shown in Figure 3 , the current boosting device 6 includes a current booster 9, a power supply 10, a voltage regulator T and a compensation capacitor C; wherein, the power supply 10 is connected to the input end of the voltage regulator T through a cable; the output end of the voltage regulator T is connected to the current booster 9 through a cable, and the compensation capacitor C is arranged in parallel with the output end of the voltage regulator T.

[0051] In this embodiment, the current booster 9 adopts a through-type structure and is installed on the third test busbar 4.

[0052] In this embodiment, the current data of the power equipment is monitored in real time by the control and acquisition device and fed back to the terminal. A current loop database is established in the terminal, and the actual problems occurring in the current loop are solved by analyzing the database.

[0053] Among them, the compensation capacitor is arranged in parallel with the outgoing line terminal of the voltage regulator. The method of using a parallel compensation capacitor can effectively improve the power factor of the current loop with a relatively large capacitance of the test sample.

[0054] In this embodiment, the power supply 10 and the voltage regulator T are switched on through the control and acquisition device 7.

[0055] The working principle of the present utility model is as Figure 4 shown. The voltage regulator T is boosted by operating the control and acquisition device 7; the voltage regulator T transmits the voltage to the current booster 9 through a cable; the current booster 9 couples the voltage into an induced current and transmits it to the second test bus 13; the second test bus 13 transmits the current to the test sample 1 through the second test bushing 12 and the second overhead connection line 11 to form a complete current loop.

[0056] The compensation capacitor C plays a role in adjusting the power factor in the current test loop. When the power factor does not meet the test requirements, the corresponding compensation capacitance can be put into use according to the test requirements.

[0057] In summary, the present utility model provides an alternating current test loop that simulates the actual working conditions of power grid operation. By sequentially connecting a gas-insulated metal-enclosed switchgear in series with a current transformer device and a current boosting device to form a current test loop, the current transformer device controls the current-carrying capacity of the current boosting device in the loop for power equipment, improves the current data monitoring ability of the power equipment, can monitor the current data of the power equipment in real time, and feedback it to the terminal, thereby solving the actual problems that occur in the current loop.

[0058] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit it. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present utility model can still be modified or equivalently replaced, and any modification or equivalent replacement without departing from the spirit and scope of the present utility model shall be covered by the protection scope of the claims of the present utility model.

Claims

1. An alternating current test circuit for simulating the actual working conditions of power grid operation, characterized in that, It includes a gas-insulated metal-enclosed switchgear (1), a current transformer device (5), and a current boosting device (6). One end of the gas-insulated metal-enclosed switchgear (1) is connected to one end of the current transformer device (5), and the other end of the current transformer device (5) passes through the current boosting device (6) and is connected to the other end of the insulated metal-enclosed switchgear (1) to form a test return structure.

2. The AC current test circuit for simulating the actual operating conditions of a power grid according to claim 1, wherein One end of the gas-insulated metal-enclosed switchgear (1) is connected to the current transformer device (5) through a first unit connecting wire (15), and a first test bushing (3) is provided on the first unit wire.

3. The AC current test circuit for simulating the actual operating conditions of a power grid according to claim 2, wherein The first unit connecting wire (15) includes a first overhead connecting wire (2) and a first test bus (4); one end of the gas-insulated metal-enclosed switchgear (1) is connected to one end of the first test bushing (3) through the first overhead connecting wire (2), and the other end of the first test bushing (3) is connected to the current transformer device (5) through the first test bus (4).

4. The AC current test circuit for simulating the actual operating conditions of a power grid according to claim 1, wherein, The other end of the current transformer device (5) passes through the current boosting device (6) and is connected to the other end of the insulated metal-enclosed switchgear (1) through a second unit connecting wire (16), and a second test bushing (12) is provided on the second unit connecting wire (16).

5. An AC current test circuit for simulating the actual operating conditions of a power grid according to claim 4, characterized in that, The second unit connecting wire (16) includes a second overhead connecting wire (11), a second test bus (13), and a third test bus (14); the other end of the current transformer device (5) is connected to the third test bus (14), the third test bus (14) passes through the current boosting device (6) and is connected to one end of the second test bus (13), the other end of the second test bus (13) is connected to one end of the second test bushing (12), and the other end of the second test bushing (12) is connected to the other end of the insulated metal-enclosed switchgear (1) through the second overhead connecting wire (11).

6. An AC current test circuit for simulating the actual working conditions of power grid operation according to claim 5, characterized in that, The current boosting device (6) is provided with a through hole, and the third test bus (14) passes through the through hole and is connected to one end of the second test bus (13).

7. The AC current test loop for simulating the actual working conditions of power grid operation according to claim 6, characterized in that, The diameter of the third test bus (14) is smaller than the aperture of the through hole of the current boosting device (6).

8. An AC current test circuit for simulating the actual operating conditions of a power grid according to claim 1, characterized in that, The current transformer device (5) includes a control and acquisition device (7) and a current transformer (8); the main circuit of the current transformer (8) is connected to the gas-insulated metal-enclosed switchgear (1), the acquisition circuit of the current transformer is connected to the control and acquisition device (7), and one end of the control and acquisition device (7) is connected to the control device and the other end is connected to the current boosting device (6) for controlling and acquiring the current signal of the current boosting device (6).

9. An AC current test circuit for simulating the actual operating conditions of a power grid according to claim 1, characterized in that The current boosting device (6) includes a current booster (9), a power supply (10), and a voltage regulator (T); wherein, the power supply (10) is connected to the input end of the voltage regulator (T) through a cable; the output end of the voltage regulator (T) is connected to the current booster (9) through a cable.

10. An AC current test circuit for simulating the actual operating conditions of a power grid according to claim 9, characterized in that, The current boosting device (6) further includes a compensation capacitor (C), and the compensation capacitor (C) is arranged in parallel with the output end of the voltage regulator (T).

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