Ripple-free super-large test current controller

Abstract

The utility model relates to the technical field of current control, in particular to a ripple-free oversized test current controller, which comprises a loop copper bar, a relay board, a relay, a resistance spring piece, power resistors and a bearing board, monitors the voltage change of a direct-current power supply end in real time, and performs dynamic adjustment in combination with multiple paths of power resistors and a high-speed relay array. According to the technology, a 30,000-ampere direct-current and constant-current 15-second discharge test can be carried out on the GCB arc extinguish chamber, constant-current output is realized by directly controlling the loop resistance of a direct-current source, the ripple problem in the AC-DC or DC-DC conversion process is avoided, the test application requirements of high-precision direct-current and large-current are better met, and the test efficiency is improved. The test precision is effectively improved, the reliability of test data is ensured, and powerful technical support is provided for the field of large-current direct-current test. The problem of current stability in a large-current and high-precision direct-current test is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of current control, in particular to a ripple-free ultra-large test current controller. Background Technique

[0002] The generator outlet circuit breaker (GCB) is a core device of the basin power station, and its performance and service life are directly related to the safety and stability of the power system. The arc extinction chamber resistance value of the GCB is a key parameter for evaluating the performance and service life of the GCB. However, since the current of the GCB in the working state can reach tens of thousands of amperes, it has always been a technical challenge to accurately measure its on-state resistance.

[0003] Traditional on-state resistance measurement methods usually adopt AC-DC or DC-DC conversion methods, but these methods are prone to generate ripples during the current conversion process. The existence of ripples may lead to misjudgment of the GCB performance, reduce the measurement accuracy, and thus affect the current stability in the test. Content of the Utility Model

[0004] The purpose of the utility model is to provide a ripple-free ultra-large test current controller, aiming to solve the current stability problem in large-current and high-precision DC tests.

[0005] To achieve the above purpose, the utility model provides a ripple-free ultra-large test current controller, which includes a loop copper bar, a relay board, a relay, a resistance spring piece, a power resistor and a supporting plate;

[0006] The loop copper bar is fixedly connected to the supporting plate and is located at the top of the supporting plate. The relay board is fixedly connected to the loop copper bar and is located on one side of the loop copper bar. The relay is fixedly connected to the relay board and is located on the side of the relay board away from the loop copper bar. The power resistor is fixedly connected to the loop copper bar. One terminal of the power resistor is electrically connected to the loop copper bar through a resistance spring piece, and the other terminal is electrically connected to the relay.

[0007] Among them, the supporting plate includes a plate body, a load-bearing bracket and an insulating column. The plate body is arranged at the bottom of the loop copper bar. The load-bearing bracket is fixedly connected to the loop copper bar. The insulating column is fixedly connected to the plate body and is connected and supported with the load-bearing bracket.

[0008] Among them, mounting holes are arranged on the plate body.

[0009] Among them, the ripple-free ultra-large test current controller further includes a heat dissipation component, and the heat dissipation component is arranged on one side of the plate body.

[0010] Among them, the heat dissipation component includes a connecting plate, a bracket and a blowing component. The connecting plate is fixedly connected to the main body of the supporting plate and is located on one side of the main body of the supporting plate. The bracket is installed on the top of the connecting plate, and the blowing component is installed on the bracket.

[0011] Among them, the blowing component includes an air cavity, a cooling fan and a mounting rack. The air cavity is fixedly connected to the bracket. The mounting rack is installed on the side of the air cavity away from the power resistor, and the cooling fan is installed on the mounting rack and is close to one side of the air cavity.

[0012] In a ripple-free ultra-large test current controller of the present invention, a loop copper bar is used to connect the power resistor to the current loop. The relay serves as the switch for the power resistor to access the loop again. All power resistors are in parallel connection. The power resistor is connected to the current loop through the relay, so as to control the resistance of the entire loop. According to Ohm's law: current = voltage / resistance, the current is adjusted. The supporting plate plays a supporting role for the loop copper bar, and the voltage change at the DC power supply end of the current generator is monitored in real time. Combining multiple power resistors and relay arrays for dynamic adjustment to achieve precise control of the resistance of the test loop. This technology can perform a 15-second discharge test on the GCB arc extinguishing chamber with a direct current constant current of 30,000 amperes. By directly controlling the loop resistance of the DC power supply to achieve constant current output, it avoids the ripple problem in the AC-DC or DC-DC conversion process, better meets the test application requirements of high-precision DC large current, effectively improves the test accuracy, ensures the reliability of test data, and provides strong technical support for the field of large current DC testing. Solve the current stability problem in large current and high-precision DC testing. 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 for the description of the embodiments or the prior art.

[0014] Figure 1 It is a schematic structural diagram of a ripple-free ultra-large test current controller according to the first embodiment of the present invention.

[0015] Figure 2 It is a front view of a ripple-free ultra-large test current controller according to the first embodiment of the present invention.

[0016] Figure 3 It is a front view of a ripple-free ultra-large test current controller according to the second embodiment of the present invention.

[0017] In the figure: 101 - circuit copper bar, 102 - relay board, 103 - relay, 104 - resistor spring piece, 105 - power resistor, 106 - pallet body, 107 - load-bearing bracket, 108 - insulating column, 109 - mounting hole, 201 - connecting plate, 202 - bracket, 203 - air cavity, 204 - cooling fan, 205 - mounting frame. Specific implementation mode

[0018] The first embodiment of this application is as follows:

[0019] Please refer to Figure 1 - Figure 2 , Figure 1 which is the structural schematic diagram of the present utility model, Figure 2 and is the front view of the present utility model. A ripple-free ultra-large test current controller in this embodiment includes a circuit copper bar 101, a relay board 102, a relay 103, a resistor spring piece 104, a power resistor 105, and a supporting plate; the supporting plate includes a pallet body 106, a load-bearing bracket 107, and an insulating column 108. The pallet body 106 has a mounting hole 109. By means of the foregoing solution, the existing problems can be solved. It can be understood that the foregoing solution can be used in the scenario of current control.

[0020] For this specific embodiment, the circuit busbar 101 is fixedly connected to the supporting plate and is located on top of the supporting plate. The relay board 102 is fixedly connected to the circuit busbar 101 and is located on one side of the circuit busbar 101. The relay 103 is fixedly connected to the relay board 102 and is located on the side of the relay board 102 away from the circuit busbar 101. The power resistor 105 is fixedly connected to the circuit busbar 101 and is electrically connected to the relay 103. The resistor spring piece 104 is fixedly connected to the power resistor 105 and is located outside the power resistor 105. One terminal of the power resistor 105 is electrically connected to the circuit busbar 101 through the resistor spring piece 104, and the other terminal is electrically connected to the relay 103. The circuit busbar 101 is used to connect the power resistor 105 to the current loop. The relay 103 serves as the switch for connecting the power resistor 105 to the loop again. All the power resistors 105 are in parallel. The power resistor 105 is connected to the current loop through the relay 103, thereby controlling the resistance of the entire loop. According to Ohm's law: current = voltage / resistance, the current is adjusted. The supporting plate supports the circuit busbar 101, monitors the voltage change of the DC power supply end of the current generator connected to the circuit busbar 101 in real time, and combines the array of multiple power resistors 105 and high-speed relays 103 for dynamic adjustment to achieve precise control of the resistance of the test loop. This technology can perform a 15-second discharge test on the GCB arc extinguishing chamber with a direct current of 30,000 amperes, record the change of the power resistor in real time, and achieve constant current directly by controlling the loop resistance through the DC source, avoiding the ripple problem in the AC-DC or DC-DC conversion process, better meeting the test application requirements of high-precision DC large current, effectively improving the test accuracy, ensuring the reliability of the test data, and providing strong technical support for the field of large current DC testing. Solve the problem of current stability in large current and high-precision DC testing.

[0021] Among them, the supporting plate body 106 is arranged at the bottom of the circuit busbar 101. The load-bearing bracket 107 is fixedly connected to the circuit busbar 101, fixedly connected to the supporting plate body 106, and is located between the supporting plate body 106 and the circuit busbar 101. The insulating column 108 is fixedly connected to the supporting plate body 106 and is connected to and supports the load-bearing bracket 107. The supporting plate body 106 provides support for the load-bearing bracket 107 and the insulating column 108. The load-bearing bracket 107 is used to bear the weight of the circuit busbar 101. The setting of the insulating column 108 is for the insulation protection of this current controller to avoid the phenomenon that current is conducted from the circuit busbar 101 to the supporting plate body 106, and then the supporting plate body 106 conducts the current to the shell.

[0022] Secondly, the mounting hole 109 is located on one side of the supporting plate body 106. The setting of the mounting hole 109 is for the supporting plate body 106 to be fixedly connected to the mounting surface.

[0023] When the current controller is in use, it monitors in real time the voltage change at the DC power supply end of the current generator connected to the loop busbar 101, and combines the multi-channel power resistors 105 and the high-speed relay 103 array for dynamic adjustment to achieve precise control of the resistance of the test loop, thereby controlling the resistance of the entire loop and realizing constant current during the test process.

[0024] The second embodiment of this application is as follows:

[0025] Based on the first embodiment, please refer to Figure 3 , Figure 3 , which is the front view of the present utility model. A ripple-free ultra-large test current controller in this embodiment further includes a heat dissipation component. The heat dissipation component includes a connection plate 201, a bracket 202, and a blowing component. The blowing component includes a wind cavity 203, a heat dissipation fan 204, and a mounting frame 205.

[0026] For this specific embodiment, the heat dissipation component is arranged on one side of the pallet body 106 and is used for air-cooling the power resistor 105 during operation, so as to avoid the power resistor 105 from aging or being damaged due to untimely heat dissipation.

[0027] Among them, the connection plate 201 is fixedly connected to the pallet body 106 and is located on one side of the pallet body 106. The bracket 202 is fixedly connected to the connection plate 201 and is located at the top of the bracket 202. The blowing component is fixedly connected to the bracket 202 and is located on the side of the bracket 202 close to the loop busbar 101. The connection plate 201 is used to connect the pallet body 106 and the bracket 202. The bracket 202 provides an installation condition for the blowing component. The blowing component is used to blow air towards the power resistor 105 to accelerate the heat dissipation speed of the power resistor 105.

[0028] In one of the solutions, the blowing component includes a wind cavity 203, a heat dissipation fan 204, and a mounting frame 205. The wind cavity 203 is fixedly connected to the bracket 202 and is located on the side of the bracket 202 close to the loop busbar 101. The mounting frame 205 is fixedly connected to the wind cavity 203 and is located on one side of the wind cavity 203. The heat dissipation fan 204 is arranged on one side of the mounting frame 205. The setting of the mounting frame 205 is used to install and fix the heat dissipation fan 204 on the wind cavity 203. There are several air outlet nozzles on the side of the wind cavity 203 close to the power resistor 105. The heat dissipation fan 204 is powered on to blow air into the wind cavity 203, and the wind cavity 203 then evenly blows the air towards the power resistor 105 through the several air outlet nozzles to accelerate the heat dissipation of the power resistor 105. In addition to adopting the above structure, the blowing component can also directly adopt a heat dissipation fan.

[0029] When the heat dissipation component is in use, the connecting plate 201 is connected to the support plate body 106 through screws. The controller drives the heat dissipation fan 204, so that the heat dissipation fan 204 blows air into the air cavity 203. Then, the air cavity 203 evenly blows the air to the power resistor 105 through a plurality of air outlets, concentrating the wind force and accelerating the heat dissipation of the power resistor 105.

[0030] The above-disclosed is only a preferred embodiment of a ripple-free ultra-large test current controller of the present application, and cannot be used to limit the scope of rights of the present application. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A ripple-free ultra-large test current controller, characterized in that: It comprises a loop copper busbar (101), a relay board (102), a relay (103), a resistor spring sheet (104), a power resistor (105) and a supporting plate; The loop copper busbar (101) is fixedly connected to the supporting plate and is located on the top of the supporting plate; the relay board (102) is fixedly connected to the loop copper busbar (101) and is located on one side of the loop copper busbar; the relay (103) is fixedly connected to the relay board (102) and is located on a side of the relay board (102) away from the loop copper busbar (101); the power resistor (105) is fixedly connected to the loop copper busbar (101); one terminal of the power resistor (105) is electrically connected to the loop copper busbar (101) via a resistor spring sheet (104), and the other terminal is electrically connected to the relay (103).

2. A ripple-free ultra-large test current controller as claimed in claim 1, characterized in that: The support plate comprises a support plate body (106), a load-bearing bracket (107) and an insulating column (108); the support plate body (106) is arranged at the bottom of the loop copper busbar (101); the load-bearing bracket (107) is fixedly connected to the loop copper busbar (101); the insulating column (108) is fixedly connected to the support plate body (106) and is connected and supported by the load-bearing bracket (107).

3. A ripple-free ultra-large test current controller as claimed in claim 2, characterized in that: The support plate body (106) is provided with a mounting hole (109).

4. A ripple-free ultra-large test current controller as claimed in claim 2, characterized in that: The ripple-free ultra-large test current controller also includes a heat dissipation component, and the heat dissipation component is arranged on one side of the support plate body (106).

5. A ripple-free ultra-large test current controller as claimed in claim 4, characterized in that: The heat dissipation assembly comprises a connecting plate (201), a bracket (202) and a blowing assembly, wherein the connecting plate (201) is fixedly connected to the support plate body (106) and is located on one side of the support plate body (106), the bracket (202) is mounted on the top of the connecting plate (201), and the blowing assembly is mounted on the bracket (202).

6. A ripple-free ultra-large test current controller as claimed in claim 5, characterized in that: The blowing assembly comprises an air cavity (203), a heat dissipation fan (204) and a mounting frame (205); the air cavity (203) is fixedly connected to the bracket (202); the mounting frame (205) is mounted on a side of the air cavity (203) away from the power resistor (105); and the heat dissipation fan (204) is mounted on the mounting frame (205) and close to a side of the air cavity (203).

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