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CN-121984154-A - Electrical box system and control method

CN121984154ACN 121984154 ACN121984154 ACN 121984154ACN-121984154-A

Abstract

The present disclosure relates to an electrical box system and control method. The electrical box system comprises a power source and at least two working modules. At least two work modules are arranged in parallel, and each work module is electrically connected with a power supply. Each working module comprises a load unit and a pre-charging unit which are arranged in series. The first end of the pre-charging unit is electrically connected with the positive electrode of the power supply, the second end of the pre-charging unit is electrically connected with the first end of the load unit, and the second end of the load unit is electrically connected with the negative electrode of the power supply. The pre-charging unit is switchable between a first operating state in which the power supply pre-charges the load unit and a second operating state in which the power supply supplies power to the load unit to cause the load unit to operate normally. The pre-charging units are correspondingly arranged for the multiple groups of loads respectively, so that the redundancy of the system can be remarkably improved, when any branch circuit fails, the other branch circuit can be rapidly taken over, the continuity of power supply of the main circuit of the electric box is ensured, and the working stability of the electric box system is improved.

Inventors

  • LIU XIAOYAN
  • LIU JICHAO
  • Xu Zhongpeng

Assignees

  • 江苏徐工工程机械研究院有限公司

Dates

Publication Date
20260505
Application Date
20260319

Claims (11)

  1. 1. An electrical box system, comprising: a power supply (1), and The device comprises at least two working modules (2), wherein the at least two working modules (2) are arranged in parallel, each working module (2) is electrically connected with a power supply (1), each working module (2) comprises a load unit (21) and a pre-charging unit (22) which are arranged in series, the first end of each pre-charging unit (22) is electrically connected with the positive electrode of the power supply (1), the second end of each pre-charging unit (22) is electrically connected with the first end of each load unit (21), the second end of each load unit (21) is electrically connected with the negative electrode of the power supply (1), The pre-charging unit (22) can be switched between a first working state and a second working state, in the first working state, the power supply (1) pre-charges the load unit (21), and in the second working state, the power supply (1) supplies power to the load unit (21) so that the load unit (21) can work normally.
  2. 2. The electrical box system according to claim 1, wherein the pre-charging unit (22) comprises a pre-charging resistor (221) and a pre-charging switch element (222) which are arranged in parallel, the pre-charging unit (22) is in the first operating state when the pre-charging switch element (222) is disconnected, and the pre-charging unit (22) is in the second operating state when the pre-charging switch element (222) is connected.
  3. 3. The electrical box system according to claim 1, characterized in that the working module (2) further comprises at least two sets of heat dissipating units (23), the heat dissipating units (23) being used for dissipating heat from the electrical box system, wherein one set of the heat dissipating units (23) is used as a backup heat dissipating unit.
  4. 4. An electrical box system according to claim 3, characterized in that each set of heat dissipating units (23) comprises a fan (231) and/or a water pump (232).
  5. 5. The electrical box system according to any of claims 1-4, wherein the working module (2) further comprises a discharge unit (24), a first end of the discharge unit (24) being electrically connected to a first end of the load unit (21), a second end of the discharge unit (24) being electrically connected to a second end of the load unit (21), the discharge unit (24) being adapted to discharge the load unit (21).
  6. 6. A control method based on the electrical box system according to any one of claims 1 to 5, characterized by comprising: detecting a fault condition of the at least two working modules (2); -in case of a failure of the pre-charging unit (22) and/or the load unit (21) in one or more of the at least two working modules (2), switching the pre-charging unit (22) in the working module (2) that is not failed to the first working state; After the load unit (21) in the working module (2) which has not failed has completed the precharge, the precharge unit (22) in the working module (2) which has not failed is switched to the second working state.
  7. 7. The control method according to claim 6, wherein the precharge unit (22) includes a precharge resistor (221) and a precharge switching element (222) arranged in parallel, Switching the pre-charge unit (22) in the working module (2) that is not faulty to the first working state comprises switching off the pre-charge switching element (222) in the working module (2) that is not faulty; Switching the pre-charge unit (22) in the non-faulty working module (2) to the second working state comprises switching the pre-charge switching element (222) in the non-faulty working module (2) in communication.
  8. 8. The control method according to claim 6, wherein the operation module further comprises a discharge unit (24), a first end of the discharge unit (24) being electrically connected to the first end of the load unit (21), a second end of the discharge unit (24) being electrically connected to the second end of the load unit (21), the discharge unit (24) being for discharging the load unit (21), the control method further comprising: -in case of a failure of the discharge unit (24) in one or more of the at least two working modules (2), switching the pre-charge unit (22) in the working module (2) that is not failed to the first working state; After the load unit (21) in the working module (2) which has not failed has completed the precharge, the precharge unit (22) in the working module (2) which has not failed is switched to the second working state.
  9. 9. The control method according to claim 6, wherein the working module (2) further comprises a main fan and a backup fan, the control method further comprising: detecting whether the main fan has faults or not; radiating the heat of the electric box system by using the main fan under the condition that the main fan has no fault; and radiating the heat of the electric box system by using the standby fan under the condition that the main fan fails.
  10. 10. The control method of claim 9, wherein the work module further comprises a water pump (232), the water pump (232) configured to operate at a set rotational speed to dissipate heat from the electrical box system, the control method further comprising: The rotational speed of the water pump (232) is increased with the backup blower activated.
  11. 11. The control method according to any one of claims 6 to 10, characterized by further comprising: And under the condition that each working module (2) has no fault, enabling each working module (2) in turn according to preset conditions so as to enable a plurality of load units (21) to work alternately.

Description

Electrical box system and control method Technical Field The application relates to the technical field of electrical equipment, in particular to an electrical box system and a control method. Background The high-low voltage power box is a core component of a high-voltage power system and is responsible for distributing power to various loads and guaranteeing loop safety. When the components in the electric box are out of order, the electric box is stopped, so that the operation of the terminal equipment is affected. Disclosure of Invention The application provides an electric box system and a control method, which are used for improving the working stability of the electric box system. A first aspect of the application provides an electrical box system comprising a power source and at least two working modules. At least two work modules are arranged in parallel, each work module is electrically connected with a power supply, each work module comprises a load unit and a pre-charging unit which are arranged in series, the first end of the pre-charging unit is electrically connected with the positive electrode of the power supply, the second end of the pre-charging unit is electrically connected with the first end of the load unit, the second end of the load unit is electrically connected with the negative electrode of the power supply, wherein the pre-charging unit can be switched between a first working state and a second working state, the power supply pre-charges the load unit in the first working state, and the power supply supplies power to the load unit in the second working state so that the load unit can work normally. In some embodiments, the pre-charging unit includes a pre-charging resistor and a pre-charging switching element that are arranged in parallel, and when the pre-charging switching element is turned off, the pre-charging unit is in a first working state, and when the pre-charging switching element is turned on, the pre-charging unit is in a second working state. In some embodiments, the working module further comprises at least two sets of heat dissipating units for dissipating heat from the electrical box system, wherein one set of heat dissipating units serves as a backup heat dissipating unit. In some embodiments, each set of heat dissipating units includes a fan and/or a water pump. In some embodiments, the working module further comprises a discharge unit, a first end of the discharge unit being electrically connected to the first end of the load unit, a second end of the discharge unit being electrically connected to the second end of the load unit, the discharge unit being for discharging the load unit. The second aspect of the present application provides a control method based on the above electrical box system, including: Detecting fault states of at least two working modules; Switching the pre-charge unit in the non-faulty working module to a first working state in case of a fault of the pre-charge unit and/or the load unit in one or more of the at least two working modules; And after the load unit in the working module which does not have faults finishes the pre-charging, switching the pre-charging unit in the working module which does not have faults to a second working state. In some embodiments, the pre-charge unit includes a pre-charge resistor and a pre-charge switching element arranged in parallel, Switching the pre-charge unit in the non-faulty working module to the first working state comprises switching off the pre-charge switching element in the non-faulty working module; Switching the pre-charge unit in the non-faulty working module to the second working state comprises switching on the pre-charge switching element in the non-faulty working module. In some embodiments, the working module further comprises a discharge unit, a first end of the discharge unit is electrically connected to the first end of the load unit, a second end of the discharge unit is electrically connected to the second end of the load unit, the discharge unit is used for discharging the load unit, and the control method further comprises: switching the pre-charge unit in the non-failed working module to a first working state in case of a failure of the discharge unit in one or more of the at least two working modules; And after the load unit in the working module which does not have faults finishes the pre-charging, switching the pre-charging unit in the working module which does not have faults to a second working state. In some embodiments, the work module further includes a main fan and a backup fan, and the control method further includes: Detecting whether a main fan fails; and the main fan is used for radiating the electric box system under the condition that the main fan does not have faults, and the standby fan is used for radiating the electric box system under the condition that the main fan has faults. In some embodiments, the work module further comprises a water pump configured to