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CN-113826179-B - Method for performing a switching of at least one switching device of an operating device and drive system for at least one switching device of an operating device

CN113826179BCN 113826179 BCN113826179 BCN 113826179BCN-113826179-B

Abstract

A method for performing a handover of an operating device (20) is disclosed. The operating device (20) comprises at least one first switching device (17) which may be an on-load tap changer and/or at least one second switching device (18) which may be a bidirectional commutator (18). The invention further relates to a drive system (3) for at least a first and a second switching device (17, 18) of a control device (20). Each of the first switching devices (17) and each of the second switching devices (18) is provided with its own motor (12, 13) which is connected to the first switching device (17) and any one of the second switching devices (18) by means of a drive shaft (16). At least one parameter can be obtained for the first switching device (17) and for each second switching device (18) by means of a respective feedback system (6, 7) associated with the first motor (12) and each second motor (13). The parameters obtained determine the blocking conditions for the first switching device (17) and the second switching device (18).

Inventors

  • E. Zell
  • K. Axmeyer
  • B. Ditman

Assignees

  • 赖茵豪森机械制造公司

Dates

Publication Date
20260508
Application Date
20200423
Priority Date
20190515

Claims (16)

  1. 1. Method for performing a switching of at least one switching device (17, 18) of at least one operating device (20), wherein the operating device (20) is a transformer and the switching device is an on-load tap changer or a bidirectional commutator, respectively, characterized by the steps of: -the control unit (10) receives a switching signal, -Selecting said at least one switching device (17, 18) for switching based on said switching signal by means of a control unit (10); -checking the respective blocking condition for the selected at least one switching device (17, 18) as a function of at least one parameter, and -Executing said switching by means of said at least one switching device (17, 18) selected by means of the respective motor (12, 13) of said at least one switching device (17, 18) selected when the respective blocking condition is fulfilled, Wherein the at least one parameter comprises a selected position and/or motion state of the at least one switching device (17, 18), and Wherein a respective blocking condition, which is related to the selected position and/or movement state of the at least one switching device (17, 18), defines whether the respective switching is blocked or not, such that the switching can take place when the blocking condition is fulfilled, in order to increase the safety of the switching device and the operating device during the switching.
  2. 2. The method according to claim 1, wherein a plurality of parameters for the at least one switching device (17, 18) selected are evaluated in the control unit (10) and further comprising one or more of temperature, customer specific switching signals, status of power switches or safety devices.
  3. 3. Method according to claim 1 or 2, wherein the at least one parameter is retrieved by a control unit (10) from a feedback system (6, 7) which is associated with a first motor (12) of the first switching device and/or with a second motor (13) of at least the second switching device.
  4. 4. A method according to claim 3, wherein the feedback system (6, 7) is fitted with a drive shaft (16) for the first motor (12) or with a drive shaft (16) for the second motor (13).
  5. 5. The method according to claim 4, wherein a power component (11) associated with at least one of the at least one operating device (20) is actuated by the control unit (10) to actuate the selected at least one switching device (17, 18), and the power component (11) actuates the respective switching device (17, 18) by means of the respective motor (12, 13) via the respective drive shaft (16) in accordance with the obtained locking condition.
  6. 6. Method according to claim 1 or 2, wherein three operating devices (20) are provided and one power component (11) is assigned to each of the three operating devices (20), and the power components (11) are operated by the control unit (10), wherein the on-load tap changers of the three operating devices (20) are combined into a first switching device group (30), the first commutators of the three operating devices (20) are combined into a second switching device group (40) and the second commutators of the three operating devices (20) are combined into a third switching device group (50).
  7. 7. Method according to claim 1 or 2, wherein the transformer (20) is assigned three on-load tap-changers as switching devices, wherein, for performing the switching, a power component (11) associated with the transformer (20) is operated by a control unit (10) for actuating one of the three on-load tap-changers, and the power component (11) actuates the motor (12) of the respective on-load tap-changer via a drive shaft (16) in dependence on the execution of the switching.
  8. 8. Method according to claim 1 or 2, wherein the transformer (20) is assigned one on-load tap changer as a first switching device and one two-way diverter each as a second switching device and a third switching device, wherein, for performing the switching, a power component (11) associated with the transformer (20) is operated by a control unit (10) for operating at least one of the on-load tap changer and the two-way diverters, and the power component (11) operates, depending on the execution of the switching, a first motor (12) connected to the on-load tap changer by means of a drive shaft (16) and a second motor (13) connected to one of the two-way diverters by means of the drive shaft (16) in each case.
  9. 9. A drive system (3) for at least one switching device (17, 18) of an operating device (20), wherein the operating device (20) is a transformer and the switching devices are each an on-load tap changer or a two-way commutator, characterized in that: -a first electric motor (12) mechanically coupled with a first switching device of the at least one switching device of the operating device (20) by means of a drive shaft (16); A control unit (10) which is connected in communication with the power component (11) for actuating a first switching device of the at least one switching device by means of a first motor (12) as long as a blocking condition checked by the control unit (10) based on the obtained at least one parameter is fulfilled, Wherein the at least one parameter comprises a position and/or a movement state of the at least one switching device (17, 18), and Wherein a respective blocking condition, which is related to the selected position and/or movement state of the at least one switching device (17, 18), defines whether the respective switching is blocked or not, such that the switching can take place when the blocking condition is fulfilled, in order to increase the safety of the switching device and the operating device during the switching.
  10. 10. The drive system (3) according to claim 9, wherein the drive system is provided with two switching devices (17, 18) for operating the device (20), the drive system (3) further comprising: -a second switching device; -a second motor (13) mechanically coupled to the second switching device by a drive shaft (16); -the control unit (10) is communicatively connected to the power component (11) for operating the second switching device with the second motor (13) as long as a blocking condition checked by the control unit (10) based on the at least one obtained parameter is fulfilled.
  11. 11. A drive system (3) as claimed in claim 10, wherein a feedback system (6, 7) is assigned to the first motor (12) and to the second motor (13), respectively, in order to obtain at least one parameter of the first switching device and at least one parameter of the second switching device.
  12. 12. The drive system (3) according to claim 11, wherein the feedback system (6, 7) is matched to a drive shaft (16) for the first motor (12) or to a drive shaft (16) for the second motor (13).
  13. 13. The drive system (3) according to any one of claims 9 to 12, wherein the drive system (3) is provided for three operating devices (20), a power unit (11) being assigned to each operating device (20), and each power unit (11) being connected to a unique control unit (10) via a respective bus (19), wherein the on-load tap-changers of the operating devices (20) are combined into a first switching device group (30), the first bidirectional commutators of the operating devices (20) are combined into a second switching device group (40), and the second bidirectional commutators of the operating devices (20) are combined into a third switching device group (50).
  14. 14. The drive system (3) according to claim 9, wherein three on-load tap changers are assigned to the transformer (20).
  15. 15. The drive system (3) according to claim 9, wherein the transformer (20) is provided with a single on-load tap changer and two bi-directional commutators.
  16. 16. The drive system (3) according to claim 13, wherein the control unit (10) and/or the power unit (11) comprises a memory (5).

Description

Method for performing a switching of at least one switching device of an operating device and drive system for at least one switching device of an operating device Technical Field The invention relates to a method for performing a switching of at least one switching device of an operating device. The invention further relates to a drive system for at least one switching device of an operating device. Background German laid-open patent DE 102011020310732 A1 discloses an on-load tap changer with a motor drive for switching between winding taps of a tap transformer. The drive shaft is driven by means of a motor drive section. The rotary movement of the drive section of the switch motor is provided by two switchable coupling means of a first drive shaft which is associated with the selector and a second drive shaft which is associated with the load changeover switch. The selector and the load changeover switch may be configured to be turned on with each other irrespective of the rotational movement of the motor drive portion introduced. Voltage regulation in energy transmission and energy distribution networks requires different types of switches to be embedded in the transformer. In operation of the transformer, various factors and thus the switch play an important role. It is therefore necessary to coordinate the handling of the two on-load tap-changers, for example in a transformer with two embedded on-load tap-changers. This is achieved by means of a rigid connecting rod between the two on-load tap changers, which is driven by a common motor. The incorrect engagement of the connecting rod can lead to malfunctions during operation, which can lead to significant technical and economic consequences in extreme cases. Disclosure of Invention The object of the present invention is therefore to provide a method for performing a switching of at least one switching device of an operating device, by means of which the safety and reliability of the switching device and the operating device are increased. The object is achieved by a method for performing a switching of a switching device of an operating device, which method comprises the features described in the present invention. Another object is to provide a better solution for a drive system of a switching device, by means of which the safety of the switching device and the operating device is improved. Another object of the present invention is to provide a drive system for at least one switching device of an operating device, by means of which the safety and reliability of the switching device and the operating device during switching are improved. The above object is achieved by a drive system for operating at least one switching device of a device, which drive system comprises the features described in the present invention. The invention relates to a method for performing a switching of at least one switching device of at least one operating device, wherein the operating device is a transformer and the switching device is an on-load tap changer or a bidirectional commutator, respectively, characterized by the following steps: The control unit receives a switching signal, -Selecting said at least one switching device for switching based on said switching signal by means of a control unit; Checking a respective blocking condition for the selected at least one switching device as a function of at least one parameter, and Executing the switching by means of the selected at least one switching device by means of the corresponding motor of the selected at least one switching device when the corresponding blocking condition is fulfilled, Wherein the at least one parameter comprises a selected position and/or motion state of the at least one switching device, and Wherein a respective blocking condition based on the at least one parameter defines whether a respective switch is blocked, such that the switch can occur when the blocking condition is met. The method according to the invention for performing a switching of at least one switching device associated with an operating device is characterized in that the control unit or the control device receives a switching signal. At least one of the switching devices is selected for switching by means of the control unit. This is achieved based on the switching signal. At least one parameter is retrieved from the feedback system by the control unit. A feedback system may be associated with one motor per switching device. The switching is performed by the selected switching device by means of a motor connected to the respective switching device via a drive shaft. The switching is only performed when the corresponding blocking condition is satisfied for the selected switching device. The switching signal may be input manually, for example, by a voltage regulator, or generated in any other way. The voltage regulator monitors voltage fluctuations in the network. Signals are output to the control unit according to the requiremen