CN113295992B - Method for verifying locking logic relationship of isolating switch - Google Patents
Method for verifying locking logic relationship of isolating switch Download PDFInfo
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- CN113295992B CN113295992B CN202110521959.XA CN202110521959A CN113295992B CN 113295992 B CN113295992 B CN 113295992B CN 202110521959 A CN202110521959 A CN 202110521959A CN 113295992 B CN113295992 B CN 113295992B
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- 238000002955 isolation Methods 0.000 claims abstract description 78
- 230000002159 abnormal effect Effects 0.000 claims abstract description 26
- 238000012795 verification Methods 0.000 description 15
- 230000000903 blocking effect Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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Abstract
The invention provides a method for verifying a locking logic relationship of an isolating switch, which is used in a transformer substation with a bypass main wiring mode of a double bus formed by a first bus, a second bus and a bypass bus; the first bus is connected with the second bus through a bus interval, a connecting end of the connected outlet interval is isolated through the first bus, and the first bus grounding knife is arranged; the second bus is connected with the same connecting end at intervals through a second bus isolating switch, and a second bus grounding knife is also arranged; the bypass bus is connected with the other connecting end of the outlet line interval through a bypass bus isolating switch, and a bypass bus grounding knife is arranged; the outlet interval is provided with an outlet interval switch; comprising the following steps: when the opening and closing actions of the wire outlet interval switch are normal, controlling the wire outlet interval switch to open, and detecting the opening actions of the first bus isolation switch and the second bus isolation switch; if at least one of the opening actions is abnormal, the isolation switch locking logic relationship is determined to be incorrect. By implementing the invention, the potential safety hazard of the power grid is avoided by determining the correctness of the locking logic relationship of the isolating switch.
Description
Technical Field
The invention relates to the technical field of power grids, in particular to a method for verifying a locking logic relationship of an isolating switch.
Background
With the development of electric science and technology, the power grid equipment is more and more, so that the workload of operation and acceptance of the power grid equipment is increased, and especially, the acceptance engineering for isolating the switch control electric locking secondary circuit during the operation and acceptance of the power grid equipment is quite complex and has strong logic, so that acceptance links are easily omitted, and potential safety hazards are buried.
At present, a plurality of main wiring modes exist in the transformer substation, including a double-bus bypass main wiring mode, a three-half wiring mode, a double-bus double-section wiring mode and the like. However, in the double-bus bypass main wiring mode, no corresponding acceptance or verification method is available for determining the correctness of the blocking logic relationship of the isolating switch, so that a great potential safety hazard exists in the power grid.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a method for verifying the locking logic relationship of the isolating switch, which is used in a transformer substation with a double-bus bypass main wiring mode, and the potential safety hazard of a power grid can be avoided by gradually determining the correctness of the locking logic relationship of the isolating switch.
In order to solve the technical problems, the embodiment of the invention provides a method for verifying a locking logic relationship of an isolating switch, which is used in a transformer substation with a double-bus bypass main wiring mode formed by a first bus, a second bus and a bypass bus;
the first bus is connected with the second bus through a preset bus connection interval, is connected to a first preset connection end on a preset outlet interval through a preset first bus isolating switch, and is also correspondingly and pre-connected with at least one first bus grounding knife to be grounded;
the second bus is connected to a first preset connecting end on the outlet interval connected with the first bus isolating switch through a preset second bus isolating switch so as to be connected with the outlet interval, and at least one second bus grounding knife is correspondingly and pre-connected to the second bus;
the bypass bus is connected to a second preset connecting end on the outlet interval through a preset bypass bus isolating switch, and at least one bypass bus grounding knife is correspondingly and pre-connected to the bypass bus to be grounded;
the outlet interval switch is arranged in advance between the first preset connecting end and the second preset connecting end;
wherein the method comprises the steps of:
when the switching-on and switching-off actions of the outlet interval switch are normal, controlling the outlet interval switch to be in a switching-off state, and further detecting the switching-off actions of the first bus isolating switch and the second bus isolating switch respectively;
and if detecting that at least one of the first bus isolating switch and the second bus isolating switch is abnormal in opening action, determining that the locking logic relationship of the current isolating switch is incorrect.
Wherein the method further comprises:
if the switching-off actions of the first bus isolation switch and the second bus isolation switch are detected to be normal, after the bus connection interval is determined to enable the first bus and the second bus to be normally conducted, the switching-on actions of the first bus isolation switch and the second bus isolation switch are respectively detected, and if the switching-on action of at least one of the first bus isolation switch and the second bus isolation switch is detected to be abnormal, the current isolation switch locking logic relationship is determined to be incorrect.
Wherein the method further comprises:
if the switching-off actions of the first bus isolation switch and the second bus isolation switch are detected to be normal, after the fact that normal conduction between the first bus and the second bus cannot be achieved through the bus connection interval is further determined, switching-on actions of the first bus isolation switch and the second bus isolation switch are detected respectively based on the fact that all the first bus grounding knives and all the second bus grounding knives are in a switching-off state, and if switching-on actions of at least one of the first bus isolation switch and the second bus isolation switch are detected to be abnormal, the fact that the current isolation switch locking logic relationship is incorrect is determined.
Wherein the method further comprises:
and if the switching-on and switching-off actions of the first bus isolating switch and the second bus isolating switch are detected to be normal, the switching-on and switching-off actions of the bypass bus isolating switch are respectively detected based on the fact that all bypass bus grounding knives are in a switching-off state, and if at least one of the switching-on and switching-off actions of the bypass bus isolating switch is detected to be abnormal, the current isolating switch locking logic relationship is determined to be incorrect.
Wherein the method further comprises:
if the switching-on and switching-off actions of the first bus isolating switch, the second bus isolating switch and the bypass bus isolating switch are normal, the current isolating switch locking logic relationship is determined to be correct.
Wherein the method further comprises:
if the outlet interval is detected to be further provided with an outlet side isolating switch which is positioned between the first preset connecting end and the second preset connecting end and is connected with the outlet interval switch in series, the opening and closing actions of the outlet side isolating switch are further detected respectively, and when the opening and closing actions of the outlet side isolating switch are detected to be normal, the current isolating switch locking logic relationship is continuously determined to be correct; or if at least one of the opening action and the closing action of the outgoing line side isolating switch is abnormal, the current isolating switch locking logic relationship is changed to be incorrect.
Wherein the method further comprises:
if it is detected that the area, between the first preset connection end and the second preset connection end, of the wire outlet interval is further connected with at least one wire outlet side grounding knife to be grounded, detecting the opening and closing actions of each wire outlet side grounding knife respectively on the basis that the opening and closing actions of the wire outlet side isolating switch are normal and are controlled to be in a switching-off state, and continuing to confirm that the locking logic relationship of the current isolating switch is correct when detecting that the opening and closing actions of all wire outlet side grounding knives are normal; or when abnormal opening or/and closing actions of at least one outgoing line side earth knife are detected, changing the current isolating switch locking logic relationship to be incorrect;
when detecting the opening and closing actions of any one of the outlet side earth blades, all the outlet side earth blades except the outlet side earth blade which is being detected are required to be controlled to be in an opening and closing state.
Wherein, the first bus ground knife is two; the number of the second bus ground knives is two; the bypass bus ground knives are two.
The three outgoing line side ground knives are arranged in the middle and two opposite sides of the outgoing line side isolating switch and the outgoing line interval switch at intervals.
The embodiment of the invention has the following beneficial effects:
the invention is used in a transformer substation with a double-bus bypass main wiring mode, and detects whether the opening and closing actions of all the isolating switches are normal or not based on a preset logic sequence (such as an outlet space switch, a first bus isolating switch, a second bus isolating switch, a bypass bus isolating switch, an outlet side isolating switch and an outlet side grounding knife) so as to gradually verify the correctness of the locking logic relationship of the isolating switches and avoid potential safety hazards of a power grid.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that it is within the scope of the invention to one skilled in the art to obtain other drawings from these drawings without inventive faculty.
FIG. 1 is a flowchart of a method for verifying a blocking logic relationship of an isolating switch according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a connection structure of a substation adopting a double-bus bypass main wiring mode in a method for verifying a blocking logic relationship of an isolating switch according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.
As shown in fig. 1, in the embodiment of the present invention, a method for verifying a blocking logic relationship of an isolating switch is provided, which is used in a transformer substation (as shown in fig. 2) with a bypass main wiring mode of a double bus formed by a first bus 1M, a second bus 2M and a bypass bus 3M;
the first bus 1M is connected with the second bus 2M through a preset bus connection interval, and is connected with a first preset connection end J1 on a preset outlet interval L through a preset first bus isolating switch 1G, and at least one first bus grounding knife (two exist, 221A 0 and 221B 0) is correspondingly and pre-connected with the first bus 1M to be grounded; the bus-tie interval is formed by connecting a bus-tie switch ML1G, a bus-tie switch ML2G and a bus-tie switch MDL in series;
the second bus 2M is connected with a first preset connecting end J1 on a line interval L connected with the first bus isolating switch 1G through a preset second bus isolating switch 2G, so that the connection with the line interval L is realized, and at least one second bus grounding knife (including 222A 0 and 222B 0) is correspondingly and pre-connected with the second bus 2M;
the bypass bus 3M is connected to a second preset connection end J2 on the outlet interval L through a preset bypass bus isolating switch 3G, and at least one bypass bus grounding knife (two bypass bus grounding knives, 223A 0 and 223B 0) are correspondingly and pre-connected to the bypass bus 3M;
the outgoing line interval switch DL positioned between the first preset connecting end J1 and the second preset connecting end J2 is preset on the outgoing line interval L;
wherein the method comprises the steps of:
step S1, when the opening and closing actions of the wire outlet interval switch are normal, controlling the wire outlet interval switch to be in an opening state, and further detecting the opening actions of the first bus isolation switch and the second bus isolation switch respectively;
and step S2, if at least one of the first bus isolating switch and the second bus isolating switch is detected to have abnormal opening action, determining that the locking logic relationship of the current isolating switch is incorrect.
In step S1, whether the opening and closing actions of the outlet interval switch DL are normal or not is detected in advance, and if at least one of the opening and closing actions of the outlet interval switch DL is abnormal, the current logical relationship of the disconnecting switch is directly determined to be incorrect.
Therefore, step S1 can be further executed to continue to detect the correctness of the isolation switch locking logic relationship only after the opening and closing actions of the wire outlet interval switch DL are normal.
At this time, after determining that the opening and closing actions of the wire outlet interval switch DL are normal, the wire outlet interval switch DL needs to be controlled to be in an opening state, so that potential safety hazards caused by switching on and conducting of a loop are avoided; then, the opening operation of the first bus bar isolation switch 1G and the second bus bar isolation switch 2G are further detected.
It can be understood that the opening operation belongs to the safety operation of power failure, so that the safety factor is extremely large, and other related switches on the first bus 1M and the second bus 2M do not need to be operated.
In step S2, a corresponding logic verification sequence may be designed according to actual needs to determine the correctness of the latching logic relationship of the isolating switch.
For example, the first verification order may be set as the outlet spacing switch DL, the first and second bus bar disconnectors 1G and 2G, the bypass bus bar disconnector 3G. For another example, if there is an outgoing line side disconnecting switch 4G or/and an outgoing line side grounding switch (e.g., B0, C0, 40, etc.), the second verification order may be set to be an outgoing line disconnecting switch DL, a first bus bar disconnecting switch 1G and a second bus bar disconnecting switch 2G, a bypass bus bar disconnecting switch 3G, an outgoing line side disconnecting switch 4G or/and an outgoing line side grounding switch (e.g., B0, C0, 40, etc.).
In the embodiment of the present invention, taking the first verification order as an example, the verification of correctness of the locking logic relationship of the isolating switch is described in detail as follows:
(1) If the abnormal opening action of at least one of the first bus bar isolating switch 1G and the second bus bar isolating switch 2G is detected under the logic condition that the opening action of the first bus bar isolating switch 1G or the second bus bar isolating switch 2G is abnormal, namely the first bus bar isolating switch 1G and the second bus bar isolating switch 2G have operation faults or physical faults, the current isolating switch locking logic relationship is determined to be incorrect.
(2) Under the logic condition that the opening actions of the first bus isolation switch 1G and the second bus isolation switch 2G are normal, the closing actions of the first bus isolation switch 1G and the second bus isolation switch 2G need to be further detected respectively, and the two conditions are included at the moment:
(21) The bus-bar interval is normal, i.e. the bus-bar switch ML1G, the bus-bar switch ML2G and the bus-bar switch MDL are all normal and closed (switched on):
at this time, if it is detected that the opening actions of the first bus bar isolation switch 1G and the second bus bar isolation switch 2G are normal, after it is further determined that the bus bar isolation switch 1G and the second bus bar isolation switch 2G are normally turned on by the bus bar isolation interval, the closing actions of the first bus bar isolation switch 1G and the second bus bar isolation switch 2G are respectively detected, and if it is detected that at least one of the closing actions of the first bus bar isolation switch 1G and the second bus bar isolation switch 2G is abnormal, it is determined that the current isolation switch locking logic relationship is incorrect.
(22) Abnormal conditions of the bus-tie interval, namely that at least one of the bus-tie switch ML1G, the bus-tie switch ML2G and the bus-tie switch MDL is abnormal or disconnected (brake-off):
at this time, if the opening actions of the first bus bar isolation switch 1G and the second bus bar isolation switch 2G are detected to be normal, after it is further determined that the normal conduction between the first bus bar 1M and the second bus bar 2M cannot be achieved by the bus bar isolation switch 1G and the second bus bar isolation switch 2G, the closing actions of the first bus bar isolation switch 1G and the second bus bar isolation switch 2G are detected respectively based on the fact that all the first bus bar ground knives (e.g. 221 a 0, 221 b 0) and all the second bus bar ground knives (e.g. 222 a 0, 222 b 0) are in the opening state, and if the closing action of at least one of the first bus bar isolation switch 1G and the second bus bar isolation switch 2G is detected to be abnormal, the current isolation switch locking logic relationship is determined to be incorrect.
(3) And on the basis of the logic condition that the opening and closing actions of the first bus bar isolating switch 1G and the second bus bar isolating switch 2G are normal (namely, the first bus bar isolating switch 1G and the second bus bar isolating switch 2G are verified), the bypass bus bar isolating switch 3G is continuously verified.
When the opening and closing actions of the first bus isolation switch 1G and the second bus isolation switch 2G are normal, the opening and closing actions of the bypass bus isolation switch 3G are respectively detected based on that all bypass bus ground knives (such as 223 a 0 and 223 b 0) are in an opening state, and if at least one action abnormality in the opening and closing actions of the bypass bus isolation switch 3G is detected, the current isolation switch locking logic relationship is determined to be incorrect.
It can be understood that the opening operation belongs to the safety operation of power failure, so the safety coefficient is extremely high, and therefore, when the opening operation of the bypass bus isolating switch 3G is detected, all bypass bus ground knives (such as 223A 0 and 223B 0) can be in an opening state.
(4) Based on the logic condition that the opening and closing actions of the first bus bar isolating switch 1G, the second bus bar isolating switch 2G and the bypass bus bar isolating switch 3G are normal (namely, the first bus bar isolating switch 1G, the second bus bar isolating switch 2G and the bypass bus bar isolating switch 3G are verified), the final isolating switch locking logic relationship can be obtained to be correct.
That is, if the opening and closing actions of the first bus bar isolating switch 1G, the second bus bar isolating switch 2G and the bypass bus bar isolating switch 3G are detected to be normal, the current isolating switch locking logic relationship is determined to be correct.
In the embodiment of the present invention, the second verification order is taken as an example to describe in detail the verification of the correctness of the locking logic relationship of the isolating switch, and the details are as follows:
firstly, in the second verification sequence, the locking logic relationship of the outlet interval switch DL, the first bus bar isolation switch 1G, the second bus bar isolation switch 2G, and the bypass bus bar isolation switch 3G is verified, specifically, the content of (1) to (4) in the first verification sequence may be referred to for verification, and will not be described in detail herein.
Then, when the opening and closing operations of the first bus bar disconnector 1G, the second bus bar disconnector 2G, and the bypass bus bar disconnector 3G are all normal, the verification of the correctness of the locking logic relationship of the outgoing line side disconnector 4G and/or the outgoing line side earth blade (e.g., B0, C0, 40, etc.) is described in detail as follows:
(5) If the outlet interval L is detected to be further provided with an outlet side isolating switch 4G which is positioned between a first preset connecting end J1 and a second preset connecting end J2 and is connected with the outlet interval switch DL in series, the opening and closing actions of the outlet side isolating switch 4G are further detected respectively, and when the opening and closing actions of the outlet side isolating switch 4G are detected to be normal, the current isolating switch locking logic relationship is continuously determined to be correct; or if at least one of the opening and closing actions of the outgoing line side isolating switch 4G is abnormal, the current isolating switch locking logic relationship is changed to be incorrect.
(6) And based on the logic condition when the opening and closing actions of the wire-outlet side isolating switch 4G are normal, the verification is continuously carried out on the wire-outlet interval L and at least one wire-outlet side grounding knife (such as B0, C0, 40 and the like) is connected.
At this time, if it is detected that the line outlet interval L is located between the first preset connection end J1 and the second preset connection end J2 and at least one line outlet side grounding knife (such as B0, C0, 40, etc.) is grounded, then the opening and closing actions of each line outlet side grounding knife (such as one of B0, C0, 40, etc.) are detected respectively further based on that the opening and closing actions of the line outlet side isolating switch 4G are normal and are controlled to be in the opening and closing state, and when it is detected that the opening and closing actions of all line outlet side grounding knives (such as B0, C0, 40, etc.) are normal, the current isolating switch locking logic relationship is continuously determined to be correct; or when abnormal opening or/and closing actions of at least one outgoing line side earth knife (such as one of B0, C0, 40 and the like) are detected, changing the current isolating switch locking logic relationship to be incorrect;
when detecting the opening and closing actions of any one of the outlet side earth blades, all the outlet side earth blades except the outlet side earth blade which is being detected are required to be controlled to be in an opening and closing state. For example, when the outlet side earth blade B0 is detected, all outlet side earth blades (e.g., C0, 40, etc.) except the outlet side earth blade B0 need to be controlled to be in the open state.
It should be noted that, if the line outlet interval L is connected to a plurality of line outlet side earth blades before verification, each line outlet side earth blade (e.g. B0, C0, 40, etc.) on the line outlet interval L should be controlled to be in the open state as much as possible when verifying the line outlet interval switch DL, the first bus bar isolation switch 1G, the second bus bar isolation switch 2G, and the bypass bus bar isolation switch 3G.
In one embodiment, the outlet side grounding knives have three (e.g., B0, C0, 40), and the three outlet side grounding knives (e.g., B0, C0, 40) are disposed at intervals between the outlet side disconnecting switch 4G and the outlet interval switch DL and on opposite sides, i.e., the three outlet side grounding knives (e.g., B0, C0, 40) are disposed at intervals. At this time, the outgoing line side earth blade B0 is an upper earth blade of the outgoing line interval switch DL; the outgoing line side grounding knife C0 is a lower side grounding knife of the outgoing line interval switch DL; the outgoing line side earth blade 40 is a lower earth blade of the outgoing line side disconnecting switch 4G.
Taking fig. 2 as an example, an application scenario of a method for verifying a blocking logic relationship of an isolating switch in an embodiment of the present invention is further described by a second verification sequence:
step 1: verifying whether the locking logic of the wire outlet interval switch DL is unconditional opening or closing, namely whether the opening and closing action of the wire outlet interval switch DL is normal; if the opening and closing actions of the outlet interval switch DL are normal, the step 2 is continuously executed.
Step 2: controlling the outlet interval switch DL to be in a brake-separating state, and verifying whether the brake-separating action of the first bus isolating switch 1G and the brake-separating action of the second bus isolating switch 2G are normal; if the opening action is normal, the step 3 is continuously executed or the step 4 is skipped.
Step 3: under the condition that the bus connection interval is normal, namely the bus connection switch ML1G, the bus connection switch ML2G and the bus connection switch MDL are all normal and are all closed, keeping the outgoing line interval switch DL in a switching-off state, and continuously verifying whether the closing actions of the first bus isolation switch 1G and the second bus isolation switch 2G are normal; if the closing action is normal, the step is jumped to the step 5.
Step 4: under the condition of abnormal bus connection interval, namely at least one of the bus connection switch ML1G, the bus connection switch ML2G and the bus connection switch MDL is abnormal, at the moment, under the condition that the outlet interval switch DL is kept in a switching-off state, the first bus grounding knife 221A 0+ the first bus grounding knife 221B 0+ the second bus grounding knife 222A 0+ the second bus grounding knife 222B 0+ the outlet interval switch DL + the outlet side grounding knife B0 are controlled to be in a switching-off state, and whether the switching-on actions of the first bus isolating switch 1G and the second bus isolating switch 2G are normal or not is continuously verified; and if the closing action is normal, continuing to execute the step 5.
Step 5: under the condition that the outlet interval switch DL is kept in a switching-off state, controlling the bypass bus grounding knife 223A 0, the bypass bus grounding knife 223B 0, the outlet side grounding knife 40 and the outlet side grounding knife C0 to be in a switching-off state, and continuously verifying whether the switching-on and switching-off actions of the bypass bus isolating switch 3G are normal; if the opening and closing actions are normal, continuing to execute the step 6.
Step 6: controlling the outgoing line side grounding knife 40 and the outgoing line side grounding knife C0 to be in a switching-off state under the condition that the outgoing line interval switch DL is kept in the switching-off state, and continuously verifying whether the switching-on and switching-off actions of the outgoing line side isolating switch 4G are normal; if the opening and closing actions are normal, continuing to execute the step 7.
Step 7: controlling the first bus isolating switch 1G and the second bus isolating switch 2G to be in a switching-off state when the outlet interval switch DL is kept in the switching-off state, and continuously verifying whether the switching-on and switching-off actions of the outlet side grounding switch B0 are normal; if the opening and closing actions are normal, continuing to execute the step 8.
Step 8: controlling the outgoing line side isolating switch 4G to be in a switching-off state when the outgoing line interval switch DL is kept in the switching-off state, and continuously verifying whether the switching-on and switching-off action of the outgoing line side earth knife C0 is normal; if the opening and closing actions are normal, continuing to execute the step 9.
Step 9: under the condition that the outlet interval switch DL is kept in a switching-off state, controlling the outlet side isolating switch 4G and the bypass bus isolating switch 3G to be in a switching-off state, and continuously verifying whether the switching-on and switching-off actions of the outlet side grounding switch 40 are normal; if the opening and closing actions are normal, the logic relationship of isolating and closing the lock in the whole main wiring mode is determined to be correct; otherwise, if any one of the steps 1 to 9 is abnormal, the isolation switch locking logic relationship in the whole main wiring mode is determined to be incorrect.
The embodiment of the invention has the following beneficial effects:
the invention is used in a transformer substation with a double-bus bypass main wiring mode, and detects whether the opening and closing actions of all the isolating switches are normal or not based on a preset logic sequence (such as an outlet space switch, a first bus isolating switch, a second bus isolating switch, a bypass bus isolating switch, an outlet side isolating switch and an outlet side grounding knife) so as to gradually verify the correctness of the locking logic relationship of the isolating switches and avoid potential safety hazards of a power grid.
Those of ordinary skill in the art will appreciate that all or a portion of the steps in implementing the methods of the above embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc.
The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (8)
1. A method for verifying a locking logic relationship of an isolating switch is used in a transformer substation with a bypass main wiring mode of a double bus formed by a first bus, a second bus and a bypass bus;
the first bus is connected with the second bus through a preset bus connection interval, is connected to a first preset connection end on a preset outlet interval through a preset first bus isolating switch, and is also correspondingly and pre-connected with at least one first bus grounding knife to be grounded;
the second bus is connected to a first preset connecting end on the outlet interval connected with the first bus isolating switch through a preset second bus isolating switch so as to be connected with the outlet interval, and at least one second bus grounding knife is correspondingly and pre-connected to the second bus;
the bypass bus is connected to a second preset connecting end on the outlet interval through a preset bypass bus isolating switch, and at least one bypass bus grounding knife is correspondingly and pre-connected to the bypass bus to be grounded;
the outlet interval switch is arranged in advance between the first preset connecting end and the second preset connecting end;
characterized in that the method comprises the steps of:
when the switching-on and switching-off actions of the outlet interval switch are normal, controlling the outlet interval switch to be in a switching-off state, and further detecting the switching-off actions of the first bus isolating switch and the second bus isolating switch respectively;
if at least one of the first bus isolating switch and the second bus isolating switch is detected to have abnormal opening action, determining that the locking logic relationship of the current isolating switch is incorrect;
wherein the method further comprises:
if the switching-off actions of the first bus isolation switch and the second bus isolation switch are detected to be normal, after the bus connection interval is determined to enable the first bus and the second bus to be normally conducted, the switching-on actions of the first bus isolation switch and the second bus isolation switch are respectively detected, and if the switching-on action of at least one of the first bus isolation switch and the second bus isolation switch is detected to be abnormal, the current isolation switch locking logic relationship is determined to be incorrect.
2. The method of verifying a lockout logical relationship of an isolation switch of claim 1, further comprising:
if the switching-off actions of the first bus isolation switch and the second bus isolation switch are detected to be normal, after the fact that normal conduction between the first bus and the second bus cannot be achieved through the bus connection interval is further determined, switching-on actions of the first bus isolation switch and the second bus isolation switch are detected respectively based on the fact that all the first bus grounding knives and all the second bus grounding knives are in a switching-off state, and if switching-on actions of at least one of the first bus isolation switch and the second bus isolation switch are detected to be abnormal, the fact that the current isolation switch locking logic relationship is incorrect is determined.
3. A method of verifying a lockout logical relationship of an isolation switch according to claim 1 or 2, wherein the method further comprises:
and if the switching-on and switching-off actions of the first bus isolating switch and the second bus isolating switch are detected to be normal, the switching-on and switching-off actions of the bypass bus isolating switch are respectively detected based on the fact that all bypass bus grounding knives are in a switching-off state, and if at least one of the switching-on and switching-off actions of the bypass bus isolating switch is detected to be abnormal, the current isolating switch locking logic relationship is determined to be incorrect.
4. A method of verifying a lockout logical relationship of an isolation switch as defined in claim 3, further comprising:
if the switching-on and switching-off actions of the first bus isolating switch, the second bus isolating switch and the bypass bus isolating switch are normal, the current isolating switch locking logic relationship is determined to be correct.
5. The method of verifying a lockout logical relationship of an isolation switch of claim 4, further comprising:
if the outlet interval is detected to be further provided with an outlet side isolating switch which is positioned between the first preset connecting end and the second preset connecting end and is connected with the outlet interval switch in series, the opening and closing actions of the outlet side isolating switch are further detected respectively, and when the opening and closing actions of the outlet side isolating switch are detected to be normal, the current isolating switch locking logic relationship is continuously determined to be correct; or if at least one of the opening action and the closing action of the outgoing line side isolating switch is abnormal, the current isolating switch locking logic relationship is changed to be incorrect.
6. The method of verifying a lockout logical relationship of an isolation switch of claim 5, further comprising:
if it is detected that the area, between the first preset connection end and the second preset connection end, of the wire outlet interval is further connected with at least one wire outlet side grounding knife to be grounded, detecting the opening and closing actions of each wire outlet side grounding knife respectively on the basis that the opening and closing actions of the wire outlet side isolating switch are normal and are controlled to be in a switching-off state, and continuing to confirm that the locking logic relationship of the current isolating switch is correct when detecting that the opening and closing actions of all wire outlet side grounding knives are normal; or when abnormal opening or/and closing actions of at least one outgoing line side earth knife are detected, changing the current isolating switch locking logic relationship to be incorrect;
when detecting the opening and closing actions of any one of the outlet side earth blades, all the outlet side earth blades except the outlet side earth blade which is being detected are required to be controlled to be in an opening and closing state.
7. The method of verifying a lockout logical relationship of a disconnector of claim 6, wherein the first bus bar has two ground blades; the number of the second bus ground knives is two; the bypass bus ground knives are two.
8. The method of verifying a lockout logical relationship of a disconnector of claim 7, wherein there are three of said outlet side ground blades, said three outlet side ground blades being spaced on a middle and opposite sides of said outlet side disconnector and said outlet space switch.
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