CN115940086A - Converter transformer excitation surge current suppression device - Google Patents
Converter transformer excitation surge current suppression device Download PDFInfo
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- CN115940086A CN115940086A CN202211625467.6A CN202211625467A CN115940086A CN 115940086 A CN115940086 A CN 115940086A CN 202211625467 A CN202211625467 A CN 202211625467A CN 115940086 A CN115940086 A CN 115940086A
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Abstract
The invention discloses a converter transformer magnetizing inrush current suppression device, which is applied to a converter transformer circuit with the voltage level of 550kV, the control module is used for controlling the action of a quick isolating switch in a suppression module, so that the time of putting a resistor into the converter transformer circuit is controlled, and the quick isolating switch can finish the action in about 30ms (the dispersity is +/-2 ms) because the response time of the current control module is generally 8-10 ms, so that the resistance putting time of the converter transformer magnetizing inrush current suppression device disclosed by the invention can reach 40ms, the resistance putting time is longer than that of a closing resistance magnetizing inrush current suppression device and is far shorter than the resistance putting time of starting the resistance magnetizing inrush current suppression device, the magnetizing inrush current suppression effect is better, the requirement on resistance heat capacity is reduced, and the manufacturing cost of the magnetizing inrush current suppression device is reduced.
Description
Technical Field
The invention relates to the technical field of direct current transmission, in particular to a converter transformer magnetizing inrush current suppression device.
Background
When the no-load converter transformer performs switching-on operation, because the magnetic flux of the iron core is easily saturated, a very large magnetizing inrush current may be generated, which may cause malfunction of the protection device and cause the transformer to fail to operate normally, and therefore, certain measures need to be taken to suppress the magnetizing inrush current of the converter transformer.
The existing converter station of the direct current transmission project generally uses a magnetizing inrush current suppression device with a closing resistor, a phase selection closing resistor or a starting resistor to suppress the magnetizing inrush current of the converter transformer, and can effectively suppress the switching-in magnetizing inrush current of the converter transformer generally, but has some problems at the same time. The success rate of suppressing the magnetizing inrush current by adopting the magnetizing inrush current suppression device with the phase selection switch-on is low. In the magnetizing inrush current suppression device using the circuit breaker with the closing resistor, the national standard and the line standard do not restrict the size and the input time of the closing resistor, and the current experience considers that the inrush current can be suppressed by the input time of 8ms to 11ms, but in practical application, after the closing resistor is additionally installed according to the conventional requirements, the condition of large magnetizing inrush current still exists because the input time of the closing resistor is insufficient. The technical improvement is generally carried out on a breaker mechanism to realize the purpose of prolonging the input time of a closing resistor so as to inhibit the magnetizing inrush current, but due to the limitation of the breaker mechanism, the closing resistor and the breaker are integrally controlled, the prolonging input time of the closing resistor is limited within a certain range, even if the breaker is technically improved, the input time of the closing resistor is difficult to be prolonged to be more than 15ms, and the effect of inhibiting the inrush current is poor.
At present, a flexible direct current converter station generally adopts a mode of starting a resistor parallel switch to suppress charging current of a flexible direct current valve, if a magnetizing inrush current suppression device adopting the starting resistor parallel switch is arranged on a converter transformer side, the effect of suppressing switching-on inrush current of the converter transformer can be achieved, and the effect is better than that of the magnetizing inrush current suppression device adopting a switching-on resistor. However, the starting resistor magnetizing inrush current suppression device is of an open structure, occupies a large space, and requires a starting resistor resistance value of more than 5000 Ω because the input time of the starting resistor is generally more than 1min, so that the requirement on the thermal capacity of the starting resistor is high, and the manufacturing cost of the magnetizing inrush current suppression device is increased.
Disclosure of Invention
The invention provides a converter transformer magnetizing inrush current suppression device, which solves the technical problems that a closing resistor magnetizing inrush current suppression device in the prior art has poor inrush current suppression effect and the manufacturing cost of a starting resistor magnetizing inrush current suppression device is high.
The invention provides a converter transformer magnetizing inrush current suppression device, which is applied to a converter transformer circuit with the voltage level of 550kV, and comprises a control module and a suppression module;
the suppression module is connected between a combined electrical appliance and a converter transformer in the converter transformer circuit;
the control module is connected with the converter transformer, the combined electrical appliance and the suppression module;
the control module is used for sending an action instruction to the combined electrical appliance and the suppression module when receiving a state request of the converter transformer and meeting a preset condition;
the suppression module comprises a quick isolating switch, a grounding switch and a resistor;
one end of the quick isolating switch is connected with one end of the grounding switch to form a first branch circuit; the other end of the grounding switch is connected with the ground; the first branch is connected with the resistor in parallel;
the inhibition module is used for responding to the action instruction to execute the actions of the quick isolating switch and the grounding switch.
Optionally, the control module includes a detection sub-module and a control sub-module;
the detection submodule is used for judging whether a preset condition is met or not according to the received state request; if yes, sending a control instruction to the control submodule; if not, rejecting the status request;
and the control submodule is used for responding to the control instruction and sending an action instruction to the combined electrical appliance and the suppression module.
Optionally, the request includes a charge request and an exit from operation request; the action command comprises a closing command and an opening command.
Optionally, the detection submodule is specifically configured to:
when the charging request is received, calculating a time interval between the request time of the charging request and the acquired historical charging end time;
if the time interval is smaller than a preset time threshold, rejecting the charging request;
if the time interval is greater than or equal to a preset time threshold, increasing the charging times according to a preset numerical value, and judging whether the current charging times are greater than a preset time threshold;
if the current charging times are larger than the preset times threshold value and the measured resistance temperature is higher than the measured environment temperature, resetting the charging times when the resistance temperature is reduced to the environment temperature;
if the current charging times are larger than the preset times threshold value and the measured resistance temperature is lower than or equal to the measured environment temperature, responding to the charging request, sending a first control instruction to the control submodule, and sending a second control instruction to the control submodule when the fact that a breaker of the combined electrical apparatus is switched on and a current signal exists in the converter transformer is detected;
and if the current charging times are less than or equal to the preset times, responding to the charging request, sending a first control instruction to the control submodule, and sending a second control instruction to the control submodule when detecting that a breaker of the combined electrical appliance is switched on and a current signal exists in the converter transformer.
Optionally, the control sub-module is specifically configured to:
responding to the first control instruction, and sequentially sending a closing instruction to a second isolating switch, a first isolating switch and a circuit breaker of the combined electrical appliance;
and responding to the second control instruction, and sending a closing instruction to the quick isolating switch.
Optionally, the detection submodule is further specifically configured to:
and when the operation quitting request is received, sending a third control instruction to the control sub-module, and when the fact that the second isolating switch of the combined electrical apparatus is switched off is detected, sending a fourth control instruction to the control sub-module.
Optionally, the control sub-module is further specifically configured to:
responding to the first control instruction, and sequentially sending a switching-off instruction to a circuit breaker, a first isolating switch and a second isolating switch of the combined electrical appliance;
responding to the second control instruction, sending a switching-off instruction to the quick isolating switch, and sending a switching-on instruction to the grounding switch.
Optionally, the operating mechanism of the fast disconnecting switch is a hydraulic operating mechanism, and is configured to execute a corresponding action after determining an action duration according to the received action instruction.
Optionally, the resistance of the resistor is greater than or equal to 1500 Ω.
Optionally, the exterior of the suppression module is a canister structure.
According to the technical scheme, the invention has the following advantages:
the invention provides a converter transformer magnetizing inrush current suppression device, which is applied to a converter transformer circuit with the voltage level of 550kV, the control module controls the action of a quick isolating switch in a suppression module, so that the time of putting a resistor into the converter transformer circuit is controlled, and the quick isolating switch can finish the action in about 30ms (the dispersity is +/-2 ms) because the response time of the current control module is generally 8 ms-10 ms, so that the resistance putting-in time of the converter transformer magnetizing inrush current suppression device provided by the invention can reach 40ms, is longer than that of a closing resistor magnetizing inrush current suppression device and is far shorter than the resistance putting-in time of starting the resistor magnetizing inrush current suppression device, the magnetizing inrush current suppression effect is better, the requirement on the resistance heat capacity is reduced, and the manufacturing cost of the magnetizing inrush current suppression device is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a converter transformer magnetizing inrush current suppression device according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a converter transformer magnetizing inrush current suppression device according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a hydraulic operating mechanism according to a second embodiment of the present invention;
fig. 4 is a schematic external structural diagram of a suppression module according to a second embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a magnetizing inrush current suppression device for a converter transformer, which is used for solving the technical problems that a switching-on resistance magnetizing inrush current suppression device in the prior art has poor inrush current suppression effect and the manufacturing cost of a starting resistance magnetizing inrush current suppression device is high.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a converter transformer magnetizing inrush current suppression device according to an embodiment of the present invention, where E is an ac power supply.
The invention provides a converter transformer magnetizing inrush current suppression device, which is applied to a converter transformer circuit with the voltage level of 550kV and comprises a control module 101 and a suppression module 102.
The suppression module 102 is connected between the combiner C and the converter transformer T in the converter transformer circuit.
The control module 101 is connected with the converter transformer T, the combiner C and the suppression module 102.
The control module 101 is configured to send an action instruction to the combiner and suppression module 102 when a status request of the converter transformer is received and a preset condition is satisfied.
The suppression module 102 includes a fast disconnect switch DS 1 And a grounding switch ES 1 And a resistance R 1 。
Fast disconnecting switch DS 1 One end of the grounding switch ES is connected with the grounding switch ES 1 One end of the first branch circuit is formed into a first branch circuit; grounding switch ES 1 The other end of the connecting rod is connected with the ground; first branch and resistor R 1 And (4) connecting in parallel.
The suppression module 102 is used for executing the fast isolation switch DS in response to an action command 1 And a grounding switch ES 1 The method can be performed.
It should be noted that, the response time of the current control module is generally 10ms, and the fast disconnecting switch DS 1 The action can be completed within about 30ms (the dispersion is +/-2 ms).
The embodiment of the invention provides a converter transformer magnetizing inrush current suppression device, which is applied to a converter transformer circuit with the voltage level of 550kV, the control module is used for controlling the action of a quick isolating switch in a suppression module, so that the time of putting a resistor into the converter transformer circuit is controlled, and the quick isolating switch can complete the action in about 30ms (the dispersity is +/-2 ms) because the response time of the current control module is generally 10ms, so that the resistance putting-in time of the converter transformer magnetizing inrush current suppression device provided by the invention can reach 40ms, is longer than that of a closing resistor magnetizing inrush current suppression device and is far shorter than that of a starting resistor magnetizing inrush current suppression device, the magnetizing inrush current suppression effect is better, the requirement on the resistance heat capacity is reduced, and the manufacturing cost of the magnetizing inrush current suppression device is reduced.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a converter transformer inrush current suppression device according to a second embodiment of the present invention.
The invention provides a converter transformer magnetizing inrush current suppression device, which is applied to a converter transformer circuit with the voltage level of 550kV and comprises a control module 201 and a suppression module 202.
The suppression module 202 is connected between the combiner C and the converter transformer T in the converter transformer circuit.
The control module 201 is connected with the converter transformer T, the combiner C and the suppression module 202.
As shown in fig. 2, E denotes an ac power supply, and the combined electrical apparatus C is represented by a circuit breaker CB and first and second disconnecting switches Q1 and Q2 on both sides. The combined electrical apparatus generally further includes a grounding switch, a voltage transformer, a current transformer, a lightning arrester, a live display device, etc., and the present invention is only to illustrate the matching logical relationship between the combined electrical apparatus and the device of the present invention, so the combined electrical apparatus is simplified as a circuit breaker CB and a first isolation switch Q1 and a second isolation switch Q2 at two sides thereof are illustrated in fig. 2.
The suppression module 202 includes a fast disconnect switch DS 2 And a grounding switch ES 2 And a resistance R 2 。
Fast disconnecting switch DS 2 One end of the grounding switch ES is connected with the grounding switch ES 2 One end of the first branch circuit is formed into a first branch circuit; grounding switch ES 2 The other end of the connecting rod is connected with the ground; first branch and resistor R 2 And (4) connecting in parallel.
The control module 201 includes a detection sub-module 2011 and a control sub-module 2012.
The detection sub-module 2011 is configured to determine whether a preset condition is met according to the received status request; if yes, sending a control instruction to the control submodule 2012; if not, rejecting the status request.
The control sub-module 2012 is used for responding to the control command and sending an action command to the combination C and the suppression module 202.
The requests include a charge request and an exit run request.
The action command comprises a closing command and an opening command.
It should be noted that, the response time of the current control module is generally 10ms, and the fast disconnecting switch DS 2 The switching-on can be completed in about 30ms (the dispersity is +/-2 ms), so that the resistance input time of the converter transformer excitation inrush current suppression device provided by the second embodiment of the invention can reach 40ms. In addition, by adjusting the response time of the control module, on the premise that the heat capacity of the resistor meets the requirement, the input time of the resistor can be prolonged, and the adjustable input time of the resistor is realized.
The detection sub-module 2011 is specifically configured to:
when a charging request is received, calculating a time interval between the request time of the charging request and the acquired historical charging end time;
if the time interval is smaller than the preset time threshold, rejecting the charging request;
if the time interval is greater than or equal to the preset time threshold, increasing the charging times according to a preset numerical value, and judging whether the current charging times are greater than the preset time threshold;
if the current charging times are larger than a preset time threshold value and the measured resistance temperature is higher than the measured environment temperature, resetting the charging times when the resistance temperature is reduced to the environment temperature;
if the current charging times are larger than a preset time threshold value and the measured resistance temperature is lower than or equal to the measured environment temperature, responding to the charging request, sending a first control instruction to the control submodule 2012, and sending a second control instruction to the control submodule 2012 when the fact that the breaker CB of the combined electrical appliance C is switched on and the converter transformer T has a current signal is detected;
if the current charging frequency is less than or equal to the preset frequency, a first control instruction is sent to the control submodule 2012 in response to the charging request, and when it is detected that the breaker CB of the combined electrical apparatus C is switched on and the converter transformer T has a current signal, a second control instruction is sent to the control submodule 2012.
It should be noted that the preset time threshold may be set to 30min, the preset number threshold may be set to 3 times, and the preset value may be set to 1 time.
The control sub-module 2012 is specifically configured to:
responding to the first control instruction, and sequentially sending a closing instruction to a second disconnecting switch Q2, a first disconnecting switch Q1 and a circuit breaker CB of the combined electrical appliance C;
in response to the second control command, to the fast disconnector DS 2 And sending a closing instruction.
It should be noted that the states of the switches before charging the converter transformer are as follows: circuit breaker CB, first isolator Q1 and second isolator Q2 are in the separating brake state among the combined electrical apparatus, quick isolator DS among the converter transformer excitation surge current suppression device 2 And a grounding switch ES 2 And is in a brake-off state. The action logic of each switch in the charging process of the converter transformer is as follows: the first isolating switch Q1, the second isolating switch Q2 and the circuit breaker CB are sequentially connected, and the resistor R 2 The control module is put into operation to start suppressing the magnetizing inrush current, and after the control module detects that the converter transformer T has a current signal, a closing instruction is sent to close the quick isolating switch DS 2 Quick disconnecting switch DS 2 After the switch-on position, the resistor R is at the time 2 And bypassing the current to stop suppressing the magnetizing inrush current.
The detection sub-module 2011 is further specifically configured to:
when receiving the operation quitting request, sending a third control instruction to the control submodule 2012, and when detecting that the switching-off of the second disconnecting switch Q2 of the combined electrical apparatus C is completed, sending a fourth control instruction to the control submodule 2012.
The control sub-module 2012 is further configured to:
responding to the first control instruction, and sequentially sending a switching-off instruction to a circuit breaker CB, a first isolating switch Q1 and a second isolating switch Q2 of the combined electrical appliance C;
in response to the second control command, to the fast disconnector DS 2 Sending a switching-off command to the grounding switch ES 2 And sending a closing instruction.
It should be noted that the action logic of the switch when the converter transformer exits the operation is as follows: firstly, sequentially disconnecting the circuit breaker CB, the first isolating switch Q1 and the second isolating switch Q2, and disconnecting the quick isolating switch DS after confirming that the second isolating switch Q2 is at the opening position 2 Finally, closing the grounding switch ES 2 And at the moment, the converter transformer circuit enters an overhaul mode.
Fast disconnecting switch DS 2 The operating mechanism is a hydraulic operating mechanism and is used for executing corresponding actions after determining action duration according to the received action instruction.
It should be noted that, in the conventional fast disconnecting switch, the spring operating mechanism is used to drive the crank arm to move so as to drive the main pull rod to perform the opening and closing movement, the power source is the elastic potential energy provided by the spring operating mechanism cam compressing the spring, once the cam and the spring are determined, the output operation power is a determined value, that is, the opening and closing speed is determined, and the adjustment of the opening and closing speed of the fast disconnecting switch at each time cannot be realized.
The hydraulic operating mechanism used in the second embodiment of the present invention is shown in fig. 3, and fig. 3 is a schematic structural diagram of the hydraulic operating mechanism, where the hydraulic operating mechanism includes a high-pressure oil cavity, a low-pressure oil cavity, a control valve, a disc spring, and a piston rod, and in order to drive the piston rod to perform opening and closing movements by using high and low oil pressures of hydraulic oil, the pressure of the hydraulic oil can be changed by controlling the flow rate of the hydraulic oil, so that the movement speed of the piston rod can be controlled, and further adjustment of the opening and closing speed of the switching device at each time can be achieved.
Optionally, the resistance of the resistor is greater than or equal to 1500 Ω.
It should be noted that, the process of confirming the specific resistance value of the resistor is as follows: modeling a direct current conversion system; and confirming the actually required resistance value of the resistor through model simulation.
Optionally, the exterior of the suppression module 202 is a canister structure.
It should be noted that, referring to fig. 4, fig. 4 is a schematic diagram of an external structure of the suppression module, where a region a is a bushing, and a region B is a can structure, and components such as a built-in resistor, a fast isolating switch, a grounding switch, and a bus bar are disposed. By adopting the structure, the suppression module can be compact, and the occupied space is smaller compared with an open structure of the starting resistance excitation inrush current suppression device.
The second embodiment of the invention provides a converter transformer magnetizing inrush current suppression device, which is applied to a converter transformer circuit with a voltage level of 550kV, the control module controls the switching-on action of a quick isolating switch in a suppression module, so that the time of putting a resistor into the converter transformer circuit is controlled, and the quick isolating switch can complete the action within about 30ms (the dispersity is +/-2 ms) due to the fact that the response time of the current control module is generally 8 ms-10 ms, so that the resistance putting-in time of the converter transformer magnetizing inrush current suppression device provided by the invention can reach 40ms, the switching-on speed can be adjusted by improving an operating mechanism of the quick isolating switch, the resistance putting-in time can be further adjusted within the range meeting the requirement of the thermal resistance capacity according to the actual situation, the resistance putting-in time is longer than that of the switching-on resistance magnetizing inrush current suppression device and is far shorter than the resistance putting-in time for starting the resistance magnetizing inrush current suppression device, the magnetizing inrush current suppression device has a better effect, the requirement on the thermal capacity of the resistor is reduced, and the manufacturing cost of the magnetizing inrush current suppression device is reduced.
In the several embodiments provided in the present application, it should be understood that the disclosed devices, modules, and sub-modules may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is only one type of logical functional division, and other divisions may be realized in practice, for example, a plurality of modules or components may be combined or integrated into another apparatus, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The device is characterized by being applied to a converter transformer circuit with the voltage level of 550kV, and comprising a control module and a suppression module;
the suppression module is connected between a combined electrical appliance and a converter transformer in the converter transformer circuit;
the control module is connected with the converter transformer, the combined electrical appliance and the suppression module;
the control module is used for sending an action instruction to the combined electrical appliance and the suppression module when receiving a state request of the converter transformer and meeting a preset condition;
the suppression module comprises a quick isolating switch, a grounding switch and a resistor;
one end of the quick isolating switch is connected with one end of the grounding switch to form a first branch circuit; the other end of the grounding switch is connected with the ground; the first branch is connected with the resistor in parallel;
the suppression module is used for responding to the action command to execute the actions of the quick isolating switch and the grounding switch.
2. The device for suppressing the magnetizing inrush current of the converter transformer according to claim 1, wherein the control module comprises a detection submodule and a control submodule;
the detection submodule is used for judging whether a preset condition is met or not according to the received state request; if yes, sending a control instruction to the control submodule; if not, rejecting the status request;
and the control submodule is used for responding to the control instruction and sending an action instruction to the combined electrical appliance and the suppression module.
3. The converter transformer magnetizing inrush current suppression device according to claim 2, wherein the status request comprises a charge request and an exit operation request; the action command comprises a closing command and an opening command.
4. The converter transformer magnetizing inrush current suppression device according to claim 3, wherein the detection submodule is specifically configured to:
when the charging request is received, calculating a time interval between the request time of the charging request and the acquired historical charging end time;
if the time interval is smaller than a preset time threshold, rejecting the charging request;
if the time interval is greater than or equal to a preset time threshold, increasing the charging times according to a preset numerical value, and judging whether the current charging times are greater than a preset time threshold;
if the current charging times are larger than the preset times threshold value and the measured resistance temperature is higher than the measured environment temperature, resetting the charging times when the resistance temperature is reduced to the environment temperature;
if the current charging times are larger than the preset times threshold value and the measured resistance temperature is lower than or equal to the measured environment temperature, responding to the charging request, sending a first control instruction to the control submodule, and sending a second control instruction to the control submodule when the fact that a breaker of the combined electrical appliance is switched on and a current signal exists in the converter transformer is detected;
and if the current charging times are less than or equal to the preset times, responding to the charging request, sending a first control instruction to the control submodule, and sending a second control instruction to the control submodule when detecting that a breaker of the combined electrical appliance is switched on and a current signal exists in the converter transformer.
5. The converter transformer magnetizing inrush current suppression device according to claim 4, wherein the control sub-module is specifically configured to:
responding to the first control instruction, and sequentially sending a closing instruction to a second isolating switch, a first isolating switch and a circuit breaker of the combined electrical appliance;
and responding to the second control instruction, and sending a closing instruction to the quick isolating switch.
6. The converter transformer magnetizing inrush current suppression device according to claim 3, wherein the detection sub-module is further configured to:
and when the operation quitting request is received, sending a third control instruction to the control sub-module, and when the fact that the second isolating switch of the combined electrical apparatus is switched off is detected, sending a fourth control instruction to the control sub-module.
7. The converter transformer magnetizing inrush current suppression device according to claim 6, wherein the control sub-module is further configured to:
responding to the first control instruction, and sequentially sending a switching-off instruction to a circuit breaker, a first isolating switch and a second isolating switch of the combined electrical appliance;
responding to the second control instruction, sending a switching-off instruction to the quick isolating switch, and sending a switching-on instruction to the grounding switch.
8. The converter transformer magnetizing inrush current suppression device according to claim 1, wherein the operating mechanism of the fast disconnector is a hydraulic operating mechanism, and is configured to execute a corresponding action after determining an action duration according to the received action command.
9. The magnetizing inrush current suppression device for a converter transformer according to claim 1, wherein the resistance of the resistor is 1500 Ω or more.
10. The converter transformer magnetizing inrush current suppression device according to claim 1, wherein an exterior of the suppression module has a tank structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211625467.6A CN115940086A (en) | 2022-12-16 | 2022-12-16 | Converter transformer excitation surge current suppression device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211625467.6A CN115940086A (en) | 2022-12-16 | 2022-12-16 | Converter transformer excitation surge current suppression device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116951131A (en) * | 2023-09-20 | 2023-10-27 | 深圳市恒永达科技股份有限公司 | Medical instrument liquid path switch electromagnetic valve and control method |
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2022
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116951131A (en) * | 2023-09-20 | 2023-10-27 | 深圳市恒永达科技股份有限公司 | Medical instrument liquid path switch electromagnetic valve and control method |
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