CN117706241A - Method for monitoring secondary components of low-current line selection device based on operation mode change - Google Patents
Method for monitoring secondary components of low-current line selection device based on operation mode change Download PDFInfo
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- CN117706241A CN117706241A CN202311680350.2A CN202311680350A CN117706241A CN 117706241 A CN117706241 A CN 117706241A CN 202311680350 A CN202311680350 A CN 202311680350A CN 117706241 A CN117706241 A CN 117706241A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000008859 change Effects 0.000 title claims abstract description 23
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 59
- 238000012216 screening Methods 0.000 claims abstract description 5
- 230000002159 abnormal effect Effects 0.000 claims description 16
- 238000007689 inspection Methods 0.000 claims description 9
- 230000008439 repair process Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000009466 transformation Effects 0.000 abstract description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The invention relates to the technical field of monitoring of a power transformation network, in particular to a method for monitoring secondary components of a small-current line selection device based on operation mode change. Detecting by adopting a laser type photoelectric switch, and judging by a reed pipe state; the maintenance state is monitored, the reed switch state can be detected by operating the maintenance handle or the maintenance connecting sheet, and the data of the OMS system is called for screening. The invention can realize the comprehensive monitoring of the low-current grounding line selection device, and can correspondingly adjust and alarm according to the running mode and the state change, thereby improving the reliability and the safety of the equipment. In addition, components such as a laser type photoelectric switch, a reed switch and the like are adopted for detection, so that accurate detection of components such as an air switch, a connecting sheet and the like can be realized.
Description
Technical Field
The invention relates to the technical field of monitoring of a power transformation network, in particular to a method for monitoring secondary components of a low-current line selection device based on operation mode change.
Background
The low-current grounding system is widely applied to the power grids with the voltage class of 35kV and below in China, the single-phase grounding fault has high fault rate in the low-current grounding system, and the short-circuit current is small and the fault cannot be timely removed when the single-phase grounding fault occurs, so that the fault is removed by adopting the low-current grounding line selection device, and the stable operation of the power grids with the medium and low voltage classes is ensured.
The low-current grounding line selection device is generally connected into a breaker position loop, a tripping loop and a zero-sequence current loop of all outlet intervals of a certain voltage class, and meanwhile, the positions of the bus-bar breakers are collected, and the line selection logic is used for judging which section of bus the fault is on, so that line selection tripping is carried out, and the fault is removed. However, when the functions of the low-current grounding line selection device and the switching of the connecting sheet do not accord with the current operation mode, the low-current grounding line selection device can malfunction or refused to operate, and further the power failure of users of the medium-low voltage and distribution network is caused, so that economic loss is caused.
Disclosure of Invention
The invention aims to provide a secondary component monitoring method of a low-current line selection device based on operation mode change, which aims to solve the problems that when the function of the low-current grounding line selection device and the switching of a connecting sheet are not in accordance with the current operation mode in the background technology, the low-current grounding line selection device is caused to malfunction or refused to operate, and then medium-low voltage and distribution network users have power failure, so that economic loss is caused.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the method for monitoring the secondary components of the low-current line selection device based on the change of the operation mode comprises the following steps:
s10: the method comprises the steps that voltage and current sampling values of a small-current grounding line selection device are obtained through a message protection system, three-phase voltages of an I section bus are UA1, UB1 and UC1, zero-sequence voltages of an I section bus are U01, three-phase voltages of an II section bus are UA2, UB2 and UC2, zero-sequence voltages of an II section bus are U02, the number of access intervals of the small-current grounding line selection device is n, the zero-sequence currents of the access intervals are I1-In, and the information of the access quantity of the small-current grounding line selection device and the position information of a breaker are obtained through a message protection substation;
s20: monitoring a secondary air switch;
s21: monitoring a power air switch of a low-current grounding line selection device: the method comprises the steps that a laser type photoelectric switch is adopted to irradiate a push rod on a power air switch of a small-current grounding line selection device, when a secondary air switch is closed, laser is shielded, the power air switch of the small-current grounding line selection device is judged to be in a closed position, otherwise, the small-current grounding line selection device is in a split position, meanwhile, the communication state and the operation condition of the small-current grounding line selection device are comprehensively checked through a message protection substation, and when the communication state and the operation condition are normal and the power air switch of the small-current grounding line selection device is in the closed position, the monitoring of the power air switch of the small-current grounding line selection device is judged to be normal;
s22: monitoring of the small current ground line selection device I, II section bus voltage air switch: adopting a laser type photoelectric switch to irradiate a push rod on a I, II-section bus voltage air switch of the small-current grounding line selection device with laser;
s30: monitoring the overhaul state; the partial low-current grounding line selection device adopts an overhaul handle mode to switch the overhaul state, and the partial low-current grounding line selection device adopts an overhaul pressing plate mode to switch the overhaul state; when the handle is overhauled, the position of the handle is detected by operating the handle reed switch, the state of the reed switch is 0 when the handle is in the working position, and the state of the reed switch is 1 when the handle is in the overhauling position; when the connecting sheet is overhauled, the position of the connecting sheet is detected through the connecting sheet reed pipe, the state of the reed pipe is 0 when the connecting sheet is at the withdrawal position, and the state of the reed pipe is 1 when the connecting sheet is at the input position; meanwhile, data of an OMS system are called for screening, when an overhaul application of the low-current grounding line selection device is found and the time is within the overhaul application time, the state is judged to be normal, no alarm is given, and when the related overhaul application is not found and the state of the reed switch is 1, the alarm is given;
s40: monitoring the connecting sheet, wherein the connecting sheet reed pipe monitors the connecting sheet of the low-current grounding line selection device, when the connecting sheet is thrown, the corresponding reed pipe state is 1, and when the connecting sheet is not thrown, the corresponding reed pipe state is 0;
s50: and alarming all abnormal conditions and sending abnormal information to a dispatcher.
Preferably, when the secondary air switch is closed in step S22, the laser is blocked, and then the low-current grounding line selection device I, II section bus voltage air switch is judged to be on, otherwise, the low-current grounding line selection device is off, and meanwhile, when the low-current grounding line selection device I section bus voltage air switch is on, the low-current grounding line selection device is not started and the low-current grounding line selection device U is not started A1 ＞Ux，U B1 ＞Ux，U C1 When the voltage air switch of the section I bus is larger than Ux, the state of the section I bus voltage air switch is normal, and when the voltage air switch of the section II bus of the small-current grounding line selection device is at a closing position, the condition that the small-current grounding line selection device is not started and U is judged A2 ＞Ux，U B2 ＞Ux，U C2 And when the voltage is larger than Ux, the voltage air switch state of the section II bus is normal.
Preferably, the Ux is a constant value of the bus voltage of the low-current ground line selection device, and is usually 40V.
Preferably, in step S22, when the operation mode is adjusted, all the intervals on the I-section bus and the positions of the bus-bar breakers are the opening positions, and U A1 ＝0，U B1 ＝0，U C1 When the operation mode is adjusted, all intervals and bus-bar breaker positions on the section II bus areWhen the brake is at the brake-separating position, and U A2 ＝0，U B2 ＝0，U C2 When the voltage is=0, the judgment of the position of the air switch of the bus voltage of the section II is not entered at the moment, and the air switch of the bus voltage of the section II is in a normal state no matter the air switch of the bus voltage of the section II is in a switching-off position or a switching-on position.
Preferably, in step S22, when any one of the bus voltage air switches of the low-current grounding line selection device I, II is split and the above normal condition is not satisfied, the bus voltage air switch of the low-current grounding line selection device I, II is abnormal, and an alarm signal is sent.
Preferably, in step S40, when the position of a circuit breaker in the low-current grounding line selection device is a closing position, the state of the line corresponding to the outlet connecting piece reed switch is judged, when the state of the reed switch is 1, the state is normal, and when the state of the reed switch is 0, the abnormal alarm is given.
Preferably, in step S40, when the operation mode is changed and a certain circuit breaker position in the low-current grounding line selection device is a breaking position, no matter the corresponding reed switch is at any position, no alarm is given.
Preferably, in step S40, when the female circuit breaker is in the closing position, it is determined that U A1 ＝U A2 、U B1 ＝U B2 、U C1 ＝U C2 、U 01 ＝U 02 And the state of the reed switch corresponding to the bus joint inspection repair connection sheet is 0, and the operation mode is judged to be a normal state.
Preferably, in step S40, when the female circuit breaker is in the opening position, it is determined that U is satisfied A1 ＝U A2 、U B1 ＝U B2 、U C1 ＝U C2 、U 01 ＝U 02 And the state of the reed switch corresponding to the bus joint inspection repair connection sheet is 1, and the operation mode is judged to be a normal state.
Preferably, in step S40, when the female circuit breaker is in the open position, U is not satisfied A1 ＝U A2 、U B1 ＝U B2 、U C1 ＝U C2 、U 01 ＝U 02 And the female joint inspection repair connection sheet corresponds toIf the state of the reed switch is 1, the bus connecting wire connecting piece is judged to be wrongly put in under the operation mode.
Compared with the prior art, the invention has the beneficial effects that: the secondary component monitoring method of the small-current line selection device based on the change of the operation mode can send out an alarm signal when the operation mode is changed but the state of the secondary component is not changed or when the state of the secondary component is abnormal or the internal information of the small-current grounding line selection device is in normal operation, can realize the comprehensive monitoring of the small-current grounding line selection device, can correspondingly adjust and alarm according to the change of the operation mode and the state, and improves the reliability and the safety of equipment. In addition, the components such as the laser type photoelectric switch and the reed switch are adopted for detection, so that the accurate detection of components such as the air switch and the connecting sheet can be realized, and the accuracy and the reliability of monitoring are further improved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain, however, the invention.
FIG. 1 is a schematic view of a secondary air switch monitoring structure in accordance with the present invention;
fig. 2 is a flow chart of the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The method for monitoring the secondary components of the low-current line selection device based on the change of the operation mode comprises the following steps:
s10: the method comprises the steps that voltage and current sampling values of a small-current grounding line selection device are obtained through a message protection system, three-phase voltages of an I section bus are UA1, UB1 and UC1, zero-sequence voltages of an I section bus are U01, three-phase voltages of an II section bus are UA2, UB2 and UC2, zero-sequence voltages of an II section bus are U02, the number of access intervals of the small-current grounding line selection device is n, the zero-sequence currents of the access intervals are I1-In, and the information of the access quantity of the small-current grounding line selection device and the position information of a breaker are obtained through a message protection substation;
s20: monitoring a secondary air switch;
s21: monitoring a power air switch of a low-current grounding line selection device: the method comprises the steps that a laser type photoelectric switch is adopted to irradiate a push rod on a power air switch of a small-current grounding line selection device, as shown in fig. 1, when a secondary air switch is closed, laser is shielded, the power air switch of the small-current grounding line selection device is judged to be in a closed position, otherwise, the small-current grounding line selection device is in a split position, meanwhile, the communication state and the operation condition of the small-current grounding line selection device are comprehensively checked through a message-keeping substation, and when the communication state and the operation condition are normal, and the power air switch of the small-current grounding line selection device is in the closed position, the monitoring of the power air switch of the small-current grounding line selection device is judged to be normal;
s22: monitoring of the small current ground line selection device I, II section bus voltage air switch: adopting a laser type photoelectric switch to irradiate a push rod on a I, II-section bus voltage air switch of the small-current grounding line selection device with laser;
s30: monitoring the overhaul state; the partial low-current grounding line selection device adopts an overhaul handle mode to switch the overhaul state, and the partial low-current grounding line selection device adopts an overhaul pressing plate mode to switch the overhaul state; when the handle is overhauled, the position of the handle is detected by operating the handle reed switch, the state of the reed switch is 0 when the handle is in the working position, and the state of the reed switch is 1 when the handle is in the overhauling position; when the connecting sheet is overhauled, the position of the connecting sheet is detected through the connecting sheet reed pipe, the state of the reed pipe is 0 when the connecting sheet is at the withdrawal position, and the state of the reed pipe is 1 when the connecting sheet is at the input position; meanwhile, data of an OMS system are called for screening, when an overhaul application of the low-current grounding line selection device is found and the time is within the overhaul application time, the state is judged to be normal, no alarm is given, and when the related overhaul application is not found and the state of the reed switch is 1, the alarm is given;
s40: monitoring the connecting sheet, wherein the connecting sheet reed pipe monitors the connecting sheet of the low-current grounding line selection device, when the connecting sheet is thrown, the corresponding reed pipe state is 1, and when the connecting sheet is not thrown, the corresponding reed pipe state is 0;
s50: and alarming all abnormal conditions and sending abnormal information to a dispatcher.
In step S22, when the secondary air switch is closed, the laser is blocked, and then the small current grounding line selection device I, II section bus voltage air switch is judged to be closed, otherwise, the small current grounding line selection device is split, and meanwhile, when the small current grounding line selection device I section bus voltage air switch is at the closing position, the small current grounding line selection device is judged to be not started and the small current grounding line selection device U is judged to be not started A1 ＞Ux，U B1 ＞Ux，U C1 When the voltage air switch of the section I bus is larger than Ux, the state of the section I bus voltage air switch is normal, and when the voltage air switch of the section II bus of the small-current grounding line selection device is at a closing position, the condition that the small-current grounding line selection device is not started and U is judged A2 ＞Ux，U B2 ＞Ux，U C2 And when the voltage is larger than Ux, the voltage air switch state of the section II bus is normal.
Ux is the constant value of the bus voltage of the low-current grounding line selection device, and is usually 40V.
In step S22, when the operation mode is adjusted, all the intervals on the I-section bus and the positions of the bus-bar circuit breaker are the opening positions, and U A1 ＝0，U B1 ＝0，U C1 When the operation mode is adjusted, when all intervals on the section II bus and the bus-bar breaker position are the opening position, and U is the same as the judgment that the section I bus voltage air switch position is not entered at the moment and whether the section I bus voltage air switch is in the opening position or the closing position is in the normal state A2 ＝0，U B2 ＝0，U C2 When the voltage is=0, the judgment of the position of the air switch of the bus voltage of the section II is not entered at the moment, and the air switch of the bus voltage of the section II is in a normal state no matter the air switch of the bus voltage of the section II is in a switching-off position or a switching-on position.
In step S22, when any one of the bus voltage air switches of the low-current grounding line selection device I, II is split and the normal condition is not satisfied, the bus voltage air switch of the low-current grounding line selection device I, II is abnormal, and an alarm signal is sent.
In step S40, when the position of a circuit breaker in the low-current grounding line selection device is a closing position, the state of the line corresponding to the outlet connecting piece reed switch is judged, when the state of the reed switch is 1, the state is normal, and when the state of the reed switch is 0, the abnormal alarm is given.
In step S40, when the operation mode is changed and the position of a circuit breaker in the low-current grounding line selection device is the opening position, no matter the corresponding reed switch is positioned at any position, no alarm is given.
In step S40, when the bus-tie breaker is at the closing position, judging U A1 ＝U A2 、U B1 ＝U B2 、U C1 ＝U C2 、U o1 ＝U 02 And the state of the reed switch corresponding to the bus joint inspection repair connection sheet is 0, and the operation mode is judged to be a normal state.
In step S40, when the bus-tie breaker is in the opening position, it is determined that U is satisfied A1 ＝U A2 、U B1 ＝U B2 、U C1 ＝U C2 、U 01 ＝U 02 And the state of the reed switch corresponding to the bus joint inspection repair connection sheet is 1, and the operation mode is judged to be a normal state.
When the bus-tie breaker is in the opening position in step S40, U is not satisfied A1 ＝U A2 、U B1 ＝U B2 、U C1 ＝U C2 、U 01 ＝U 02 And the state of the reed switch corresponding to the bus joint inspection repair connection piece is 1, and the bus connection wire connection piece is judged to be wrongly put in the operation mode.
The secondary component monitoring method of the low-current grounding line selection device based on the operation mode change can send out an alarm signal when the operation mode is changed but the state of the secondary component is not changed or when the state of the secondary component is abnormal or the internal information of the low-current grounding line selection device is in normal operation, can realize the comprehensive monitoring of the low-current grounding line selection device, can correspondingly adjust and alarm according to the operation mode and the state change, and improves the reliability and the safety of equipment. In addition, the components such as the laser type photoelectric switch and the reed switch are adopted for detection, so that the accurate detection of components such as the air switch and the connecting sheet can be realized, and the accuracy and the reliability of monitoring are further improved.
The secondary component monitoring method of the small-current line selection device based on the operation mode change acquires voltage and current sampling values of the small-current grounding line selection device, opening amount information and breaker position information through the information protection system, monitors secondary air switches, and particularly monitors a power supply air switch, a I, II-section bus voltage air switch and a connecting sheet of the small-current grounding line selection device. Detecting by adopting a laser type photoelectric switch, and judging by a reed pipe state; the maintenance state is monitored, the reed switch state can be detected by operating the maintenance handle or the maintenance connecting sheet, and the data of the OMS system is called for screening. When the maintenance application of the low-current grounding line selection device is found and the time is within the maintenance application time, judging that the device is in a normal state and not alarming; when the related maintenance application is not found and the reed switch state is 1, alarming is carried out; if abnormal conditions occur, alarming is carried out, and abnormal information is sent to a dispatcher.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The method for monitoring the secondary components of the low-current line selection device based on the change of the operation mode is characterized by comprising the following steps of: the method specifically comprises the following steps:
s10: the method comprises the steps that voltage and current sampling values of a small-current grounding line selection device are obtained through a message protection system, three-phase voltages of an I section bus are UA1, UB1 and UC1, zero-sequence voltages of an I section bus are U01, three-phase voltages of an II section bus are UA2, UB2 and UC2, zero-sequence voltages of an II section bus are U02, the number of access intervals of the small-current grounding line selection device is n, the zero-sequence currents of the access intervals are I1-In, and the information of the access quantity of the small-current grounding line selection device and the position information of a breaker are obtained through a message protection substation;
s20: monitoring a secondary air switch;
s21: monitoring a power air switch of a low-current grounding line selection device: the method comprises the steps that a laser type photoelectric switch is adopted to irradiate a push rod on a power air switch of a small-current grounding line selection device, when a secondary air switch is closed, laser is shielded, the power air switch of the small-current grounding line selection device is judged to be in a closed position, otherwise, the small-current grounding line selection device is in a split position, meanwhile, the communication state and the operation condition of the small-current grounding line selection device are comprehensively checked through a message protection substation, and when the communication state and the operation condition are normal and the power air switch of the small-current grounding line selection device is in the closed position, the monitoring of the power air switch of the small-current grounding line selection device is judged to be normal;
s22: monitoring of the small current ground line selection device I, II section bus voltage air switch: adopting a laser type photoelectric switch to irradiate a push rod on a I, II-section bus voltage air switch of the small-current grounding line selection device with laser;
s30: monitoring the overhaul state; the partial low-current grounding line selection device adopts an overhaul handle mode to switch the overhaul state, and the partial low-current grounding line selection device adopts an overhaul pressing plate mode to switch the overhaul state; when the handle is overhauled, the position of the handle is detected by operating the handle reed switch, the state of the reed switch is 0 when the handle is in the working position, and the state of the reed switch is 1 when the handle is in the overhauling position; when the connecting sheet is overhauled, the position of the connecting sheet is detected through the connecting sheet reed pipe, the state of the reed pipe is 0 when the connecting sheet is at the withdrawal position, and the state of the reed pipe is 1 when the connecting sheet is at the input position; meanwhile, data of an OMS system are called for screening, when an overhaul application of the low-current grounding line selection device is found and the time is within the overhaul application time, the state is judged to be normal, no alarm is given, and when the related overhaul application is not found and the state of the reed switch is 1, the alarm is given;
s40: monitoring the connecting sheet, wherein the connecting sheet reed pipe monitors the connecting sheet of the low-current grounding line selection device, when the connecting sheet is thrown, the corresponding reed pipe state is 1, and when the connecting sheet is not thrown, the corresponding reed pipe state is 0;
s50: and alarming all abnormal conditions and sending abnormal information to a dispatcher.
2. The method for monitoring the secondary components of the low-current line selection device based on the operation mode change according to claim 1, wherein the method comprises the following steps: in step S22, when the secondary air switch is closed, the laser is blocked, and then the small current grounding line selection device I, II section bus voltage air switch is judged to be closed, otherwise, the small current grounding line selection device is split, and meanwhile, when the small current grounding line selection device I section bus voltage air switch is at the closing position, the small current grounding line selection device is judged to be not started and the small current grounding line selection device U is judged to be not started A1 >Ux，U B1 >Ux，U C1 >When Ux, the state of the I section bus voltage air switch is normal, and when the II section bus voltage air switch of the low-current grounding line selection device is at a closing position, the judgment that the low-current grounding line selection device is not started and U is made A2 >Ux，U B2 >Ux，U C2 >And when Ux is, the voltage air switch state of the section II bus is normal.
3. The method for monitoring the secondary components of the low-current line selection device based on the operation mode change according to claim 2, wherein the method comprises the following steps: the Ux is a voltage fixed value of the bus voltage of the low-current grounding line selection device, and is usually 40V.
4. The operation mode change-based secondary component monitoring of a low-current line selection device of claim 1The method is characterized in that: in step S22, when the operation mode is adjusted, all the intervals on the I-section bus and the positions of the bus-bar circuit breaker are the opening positions, and U A1 ＝0，U B1 ＝0，U C1 When the operation mode is adjusted, when all intervals on the section II bus and the bus-bar breaker position are the opening position, and U is the same as the judgment that the section I bus voltage air switch position is not entered at the moment and whether the section I bus voltage air switch is in the opening position or the closing position is in the normal state A2 ＝0，U B2 ＝0，U C2 When the voltage is=0, the judgment of the position of the air switch of the bus voltage of the section II is not entered at the moment, and the air switch of the bus voltage of the section II is in a normal state no matter the air switch of the bus voltage of the section II is in a switching-off position or a switching-on position.
5. The method for monitoring the secondary components of the low-current line selection device based on the operation mode change according to claim 1, wherein the method comprises the following steps: in step S22, when any one of the bus voltage air switches of the low-current grounding line selection device I, II is split and the normal condition is not satisfied, the bus voltage air switch of the low-current grounding line selection device I, II is abnormal, and an alarm signal is sent.
6. The method for monitoring the secondary components of the low-current line selection device based on the operation mode change according to claim 1, wherein the method comprises the following steps: in step S40, when the position of a circuit breaker in the low-current grounding line selection device is a closing position, the state of the line corresponding to the outlet connecting piece reed switch is judged, when the state of the reed switch is 1, the state is normal, and when the state of the reed switch is 0, the abnormal alarm is given.
7. The method for monitoring the secondary components of the low-current line selection device based on the operation mode change according to claim 1, wherein the method comprises the following steps: in step S40, when the operation mode is changed and the position of a circuit breaker in the low-current grounding line selection device is the opening position, no matter the corresponding reed switch is positioned at any position, no alarm is given.
8. The method for monitoring the secondary components of the low-current line selection device based on the operation mode change according to claim 1, wherein the method comprises the following steps: in step S40, when the bus-tie breaker is at the closing position, judging U A1 ＝U A2 、U B1 ＝U B2 、U C1 ＝U C2 、U 01 ＝U 02 And the state of the reed switch corresponding to the bus joint inspection repair connection sheet is 0, and the operation mode is judged to be a normal state.
9. The method for monitoring the secondary components of the low-current line selection device based on the operation mode change according to claim 1, wherein the method comprises the following steps: in step S40, when the bus-tie breaker is in the opening position, it is determined that U is satisfied A1 ＝U A2 、U B1 ＝U B2 、U C1 ＝U C2 、U 01 ＝U 02 And the state of the reed switch corresponding to the bus joint inspection repair connection sheet is 1, and the operation mode is judged to be a normal state.
10. The method for monitoring the secondary components of the low-current line selection device based on the operation mode change according to claim 1, wherein the method comprises the following steps: when the bus-tie breaker is in the opening position in step S40, U is not satisfied A1 ＝U A2 、U B1 ＝U B2 、U C1 ＝U C2 、U 01 ＝U 02 And the state of the reed switch corresponding to the bus joint inspection repair connection piece is 1, and the bus connection wire connection piece is judged to be wrongly put in the operation mode.
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| CN202311680350.2A CN117706241A (en) | 2023-12-08 | 2023-12-08 | Method for monitoring secondary components of low-current line selection device based on operation mode change |
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| CN202311680350.2A CN117706241A (en) | 2023-12-08 | 2023-12-08 | Method for monitoring secondary components of low-current line selection device based on operation mode change |
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