CN111641183A - Interval analog quantity on-site module multi-channel SV cascade control method - Google Patents
Interval analog quantity on-site module multi-channel SV cascade control method Download PDFInfo
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- CN111641183A CN111641183A CN202010304672.7A CN202010304672A CN111641183A CN 111641183 A CN111641183 A CN 111641183A CN 202010304672 A CN202010304672 A CN 202010304672A CN 111641183 A CN111641183 A CN 111641183A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses an interval analog quantity in-situ module multi-channel SV cascade control method, which comprises the following steps: detecting a switching mode of a multi-path SV cascade; when the multi-path SV cascade is in the automatic switching mode, controlling the multi-path SV cascade to control the corresponding SV cascade to output data according to a preset rule of the automatic switching mode; and when the multi-path SV cascade is in a manual switching mode, controlling the corresponding SV cascade to transmit data according to the states of a plurality of manual switching switches of the multi-path SV cascade. The multi-channel SV cascade connection interval analog quantity local module is arranged and the switching mode of the multi-channel SV cascade connection interval analog quantity local module is controlled, so that the multi-channel SV data sources are mutually standby, the reliability of a bus local module data source is ensured by an SV cascade switching algorithm, the influence of bus merging unit faults on line protection, main transformer protection and a bus differential repression locking function is avoided, the reliability of SV cascade connection is improved, and powerful guarantee is provided for the power communication and data reliability of an intelligent transformer substation.
Description
Technical Field
The invention relates to the technical field of substation automation of a power system, in particular to an interval analog quantity on-site module multi-path SV cascade control method.
Background
The intelligent transformer substation has remarkable effects in the directions of high system integration, reasonable structural layout, advanced and applicable equipment, economy, energy conservation, environmental protection and the like, and leads the intelligent development trend of the transformer substation. The construction of the intelligent substation also passes through two development stages of a first generation and a new generation, a secondary system operation architecture which is based on an IEC61850 standard network communication platform and has the functional characteristics of measurement monitoring, control protection, information sharing and the like is formed, the system application of new technology and new equipment is promoted, and the digitization, networking and intellectualization of the secondary system of the substation are realized.
However, the intelligent station also exposes some problems during operation: a merging unit is added in a part of intelligent station protection sampling links, and an intelligent terminal is added in an export link, so that the overall action delay is increased by 7-10 ms, the protection mobility and reliability are reduced, and the safety and power supply reliability of a power grid are influenced; in addition, the merging unit has high failure rate and large influence range. At present, a bus voltage cascade mode is generally used for sampling voltages of an intelligent station of 220kV or below, namely, the voltages are uniformly sampled by a bus merging unit and are respectively sent to each interval merging unit, and if the bus merging unit fails, all related functions of line protection, main transformer protection and bus differential voltage resetting locking are affected, even misoperation is caused.
Disclosure of Invention
The invention aims to provide a multi-channel SV cascade control method of an interval analog quantity on-site module, which ensures that multi-channel SV data sources are mutually standby by setting multi-channel SV cascade access interval analog quantity on-site modules and controlling the switching mode of the multi-channel SV cascade access interval analog quantity on-site modules, ensures that an SV cascade switching algorithm ensures the reliability of a bus on-site module data source, avoids the influence of bus merging unit faults on the functions of line protection, main transformer protection and bus differential voltage-resetting locking, improves the reliability of SV cascade, and provides powerful guarantee for the power communication and data reliability of an intelligent transformer substation.
In order to solve the above technical problem, an embodiment of the present invention provides an interval analog quantity in-situ module multi-channel SV cascade control method, including the following steps:
detecting a switching mode of a multi-path SV cascade;
when the multi-path SV cascade is in an automatic switching mode, controlling the multi-path SV cascade to control corresponding SV cascade output data according to a preset rule of the automatic switching mode;
and when the multi-path SV cascade is in a manual switching mode, controlling the corresponding SV cascade to transmit data according to the states of a plurality of manual switching switches of the multi-path SV cascade.
Further, the multiplex SV cascade comprises: the SV1 cascade and the SV2 cascade;
the controlling of the corresponding SV cascade output data according to the preset rule of the automatic switching mode comprises the following steps:
judging whether the data of the SV1 cascade and the SV2 cascade are abnormal or not;
when the data of the SV1 cascade and the SV2 cascade are abnormal, the current data output state is kept;
when the data of the SV1 cascade or the SV2 cascade is abnormal, controlling the SV2 cascade or the SV1 cascade to output data;
when the data of the SV1 cascade and the SV2 cascade are normal, the SV1 cascade is controlled to output data.
Further, before the determining whether the data of the SV1 cascade and the SV2 cascade are abnormal, the method further includes:
judging whether the on-site module is in a maintenance state;
if the on-site module is in a maintenance state, controlling the SV1 cascade and the SV2 cascade to keep a current data output state;
and if the on-site module is not in a maintenance state, judging whether the data of the SV1 cascade and the SV2 cascade are abnormal.
Further, the controlling the SV2 cascade or the SV1 cascade to output data when data of the SV1 cascade or the SV2 cascade is abnormal includes:
judging whether the normal duration of the SV2 cascade or the SV1 cascade data is greater than or equal to a preset time length;
when the normal duration of the SV2 cascade or the SV1 cascade data is greater than or equal to the preset duration, controlling the SV2 cascade or the SV1 cascade to output data;
and when the normal duration of the SV2 cascade data or the SV1 cascade data is less than the preset duration, keeping the current data output state.
Further, the data exception comprises: abnormal time mark sequence number, SV frame loss, invalid SV quality, abnormal SV interval and/or abnormal resampling point.
Further, the method for judging the abnormal time mark sequence number includes: the method comprises the steps of serial number difference judgment, time mark difference judgment, quotient judgment of time mark serial numbers and/or remainder judgment of time mark serial numbers.
Further, when data abnormality of the SV1 cascade and the SV2 cascade is detected, alarm information is sent out, and the current data output state is kept.
Further, the multiplex SV cascade comprises: the SV1 cascade and the SV2 cascade;
the method for controlling the corresponding SV cascade transmission data according to the states of the multiple manual selector switches of the multi-path SV cascade comprises the following steps:
when a manual change-over switch of the SV1 cascade is switched on and a manual change-over switch of the SV2 cascade is switched off, controlling the SV1 cascade to transmit data;
when a manual change-over switch of the SV1 cascade is withdrawn and a manual change-over switch of the SV2 cascade is switched in, controlling the SV2 cascade to transmit data;
when a manual change-over switch of the SV1 cascade is switched on and a manual change-over switch of the SV2 cascade is switched on, controlling the SV1 cascade to transmit data;
and when the manual change-over switch of the SV1 cascade is withdrawn and the manual change-over switch of the SV2 cascade is switched, controlling the SV cascade to transmit data according to the automatic switching mode.
Further, the interval analog quantity local module multi-path SV cascade control method further comprises the following steps:
and controlling the switching of the I bus or the II bus according to the position of the I bus and the position of the II bus.
Further, when the interval I female isolation knife is closed and the interval II female isolation knife is also closed, the output voltage is switched to the I female voltage;
when the interval I female isolation knife is closed and the interval II female isolation knife is opened, the output voltage is switched to the I female voltage;
when the interval I female isolation knife is disconnected and the interval II female isolation knife is closed, the output voltage is switched to the interval II female voltage;
when the interval I mother blade is disconnected and the interval II mother blade is also disconnected, the output voltage is 0.
The technical scheme of the embodiment of the invention has the following beneficial technical effects:
the multi-channel SV cascade connection interval analog quantity local module is arranged and the switching mode of the multi-channel SV cascade connection interval analog quantity local module is controlled, so that the multi-channel SV data sources are mutually standby, the reliability of a bus local module data source is ensured by an SV cascade switching algorithm, the influence of bus merging unit faults on line protection, main transformer protection and a bus differential repression locking function is avoided, the reliability of SV cascade connection is improved, and powerful guarantee is provided for the power communication and data reliability of an intelligent transformer substation.
Drawings
FIG. 1 is a schematic diagram of interval analog in-situ module multi-SV cascade switching provided by an embodiment of the present invention;
FIG. 2 is a flowchart of a method for controlling the interval analog in-situ module multi-SV cascade according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a method for controlling a multi-way SV cascade of an interval analog in-situ module according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating SV cascade data anomaly determination provided by the embodiments of the present invention;
fig. 5 is a schematic diagram of interval analog quantity local module multi-SV cascade switching data migration according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Fig. 1 is a schematic diagram of interval analog quantity local module multi-SV cascade switching provided by the embodiment of the present invention.
Fig. 2 is a flowchart of a method for controlling a multi-way SV cascade of an interval analog quantity local module according to an embodiment of the present invention.
Referring to fig. 1 and fig. 2, an embodiment of the present invention provides a method for controlling an interval analog quantity local module multi-SV cascade, including the following steps:
and S100, detecting a switching mode of the multi-path SV cascade.
And S200, when the multi-path SV cascade is in the automatic switching mode, controlling the multi-path SV cascade to control the corresponding SV cascade to output data according to a preset rule of the automatic switching mode.
And S300, when the multi-path SV cascade is in the manual switching mode, controlling the corresponding SV cascade to transmit data according to the states of a plurality of manual switching switches of the multi-path SV cascade.
According to the technical scheme, the multiple SV cascade access interval analog quantity local modules are arranged and the switching mode of the multiple SV cascade access interval analog quantity local modules is controlled, so that multiple SV data sources are mutually standby, the reliability of a bus local module data source is guaranteed by an SV cascade switching algorithm, the influence of bus merging unit faults on line protection, main transformer protection and bus differential repression locking functions is avoided, the reliability of SV cascade is improved, and powerful guarantee is provided for power communication and data reliability of an intelligent substation.
In one implementation manner of the embodiment of the invention, based on the framework foundation of a transformer substation, a set A and a set B are configured by a bus analog quantity local module, the set A and the set B both have I bus and II bus voltage parallel functions, the set A and the set B respectively output 1 group of SV data to an interval analog quantity local module, and the interval analog quantity local module can simultaneously receive the SV data of the set A and the set B which can be configured by the bus analog quantity local module in parallel.
In addition, the interval analog quantity local module has the functions of local sampling and two-way SV cascade.
FIG. 3 is a schematic diagram of a method for controlling a multi-way SV cascade of an interval analog in-situ module according to an embodiment of the present invention.
Referring to fig. 3, in an embodiment of the present invention, the multiple SV cascades include: the SV1 cascade and the SV2 cascade. In step S200, controlling corresponding SV cascade output data according to a preset rule of the automatic switching mode includes:
and S210, judging whether the data of the SV1 cascade and the SV2 cascade are abnormal or not.
S220, when the data of the SV1 cascade and the SV2 cascade are abnormal, the current data output state is kept.
And S230, when the data of the SV1 cascade or the SV2 cascade is abnormal, controlling the SV2 cascade or the SV1 cascade to output data.
And S240, when the data of the SV1 cascade and the SV2 cascade are normal, controlling the SV1 cascade to output data.
The SV1 cascade and the SV2 cascade have a manual switching mode and an automatic switching mode, and can automatically adjust to the automatic switching mode when the manual switching is not performed.
Optionally, before determining whether the data of the SV1 cascade and the SV2 cascade are abnormal in step S210, determining whether the local module is in a maintenance state is further included. If the local module is in the overhaul state, controlling the SV1 cascade and the SV2 cascade to keep the current data output state; and if the local module is not in the overhaul state, judging whether the data of the SV1 cascade and the SV2 cascade are abnormal.
In step S230, when the data of the SV1 cascade or the SV2 cascade is abnormal, the SV2 cascade or the SV1 cascade is controlled to output data, including:
and S231, judging whether the normal duration of the SV2 cascade data or the SV1 cascade data is greater than or equal to a preset time length.
Optionally, the preset time period is 60 seconds.
And S232, when the normal duration of the SV2 cascade data or the SV1 cascade data is greater than or equal to the preset duration, controlling the SV2 cascade or the SV1 cascade to output the data.
And S233, when the normal duration of the SV2 cascade data or the SV1 cascade data is less than the preset duration, keeping the current data output state.
FIG. 4 is a schematic diagram of SV cascade data anomaly determination provided by the embodiment of the present invention.
Referring to fig. 4, the data exception includes: abnormal time mark sequence number, SV frame loss, invalid SV quality, abnormal SV interval and/or abnormal resampling point.
Wherein, the SV frame loss is that the SV serial number is discontinuous; the SV quality invalidation is the quality invalidation of any channel in the SV channel; the SV interval abnormity is time mark difference abnormity or sequence number difference abnormity, and does not meet the requirement of +/-10 us, and the specific judgment is that whether the sequence number is overturned due to clock jumping is judged when the sequence number difference effective criterion is not met, if the sequence number is overturned due to clock jumping, the interval is normal, otherwise, the interval is abnormal; the resampling point anomaly is that no left point or no right point can be found in resampling.
Further, the criterion for sequence number inversion caused by clock jump is as follows: the current sequence number is 0, and the last sequence number is not 0; the current frame is in a synchronous state; the time scale difference satisfies (250us-10us) < t _ diff < (250us +10 us).
Further, the method for judging the abnormal time mark sequence number comprises the following steps: the method comprises the steps of serial number difference judgment, time mark difference judgment, quotient judgment of time mark serial numbers and/or remainder judgment of time mark serial numbers.
Specifically, the determination of the normal sequence number in the sequence number difference determination is as follows:
seq_diff＝seq_cur–seq_last(seq_cur>＝seq_last)；
in the sequence number difference judgment, when the sequence number is overturned, the judgment is as follows:
seq_diff＝seq_cur+max_seq–seq_last(seq_cur<seq_last)；
the time scale difference discrimination specifically comprises:
t_diff＝t_cur-t_last；
quotient of time stamp sequence numbers:
n＝t_diff/250us；
remainder of time scale sequence number:
r＝t_diff％250us。
in summary, the criterion of the time mark number combined validity judgment is detailed in table 1.
TABLE 1
| Serial number | Condition 1 | Condition 2 | Condition 3 | The result of the discrimination |
| 1 | n＝0 | r>240us | seq_diff＝n+1 | Time stamp sequence number valid |
| 2 | n>0 | r>240us | seq_diff＝n+1 | Time stamp sequence number valid |
| 3 | n>0 | r<10us | seq_diff＝n | Time stamp sequence number valid |
In step S220, when data abnormality of the SV1 cascade and the SV2 cascade is detected, warning information is issued, and the current data output state is maintained.
In one implementation of an embodiment of the invention, a multi-way SV cascade comprises: the SV1 cascade and the SV2 cascade.
TABLE 2
| Serial number | SV1 cascade manual change-over switch | SV2 cascade manual change-over switch | Selecting the result |
| 1 | Is thrown in | Quit | SV selection 1 |
| 2 | Is thrown in | Is thrown in | SV selection 1 |
| 3 | Quit | Is thrown in | SV selection 2 |
| 4 | Quit | Quit | Automatic |
As shown in table 2, in step S300, the controlling of the corresponding SV cascade transmission data according to the states of the multiple manual switches of the multiple SV cascades includes:
and S310, controlling SV1 cascade to transmit data when the manual change-over switch of the SV1 cascade is switched on and the manual change-over switch of the SV2 cascade is switched off.
And S320, controlling SV2 cascade to transmit data when the manual change-over switch of the SV1 cascade is withdrawn and the manual change-over switch of the SV2 cascade is switched in.
And S330, controlling SV1 cascade transmission data when the manual change-over switch of the SV1 cascade is switched on and the manual change-over switch of the SV2 cascade is switched on.
And S340, controlling the SV cascade to transmit data according to the automatic switching mode when the manual change-over switch of the SV1 cascade exits and the manual change-over switch of the SV2 cascade switches.
The SV1 cascade and the SV2 cascade are provided with corresponding manual change-over switches, and when the SV1 cascade manual change-over switch and the SV2 cascade manual change-over switch are switched in, SV1 cascade data is preferentially selected.
In addition, in the embodiment of the present invention, the interval analog quantity local module multipath SV cascade control method further includes: and controlling the switching of the I bus or the II bus according to the position of the I bus blade switch at the interval and the position of the II bus blade switch at the interval.
TABLE 3
Specifically, as shown in table 3, when the interval i mother blade is closed and the interval ii mother blade is also closed, the output voltage is switched to the i mother voltage; when the first female isolation knife is closed and the second female isolation knife is opened, the output voltage is switched to the first female voltage; when the first female isolation knife is disconnected and the second female isolation knife is closed, the output voltage is switched to the second female voltage; when the first female blade is disconnected and the second female blade is also disconnected, the output voltage is 0.
Wherein, the female position of separating the sword at interval I: hard open or GOOSE open gather, interval ii parent spacer position: hard open or GOOSE open acquisition.
Fig. 5 is a schematic diagram of interval analog quantity local module multi-SV cascade switching data migration according to an embodiment of the present invention.
As shown in fig. 5, the substation in the embodiment of the present invention is provided with a third-level cache, original data of SV1 and SV2 are stored in a first-level cache, selected SV1 or SV2 is stored in a second-level cache according to a two-way cascade manual switching mode or automatic switching mode, local sampling data and i-mother voltage or ii-mother voltage data are stored in the third-level cache according to a first-mother and second-mother voltage switching state of cascade data, and an SV sending buffer area.
The embodiment of the invention aims to protect an interval analog quantity local module multi-path SV cascade control method, which comprises the following steps: detecting a switching mode of a multi-path SV cascade; when the multi-path SV cascade is in the automatic switching mode, controlling the multi-path SV cascade to control the corresponding SV cascade to output data according to a preset rule of the automatic switching mode; and when the multi-path SV cascade is in a manual switching mode, controlling the corresponding SV cascade to transmit data according to the states of a plurality of manual switching switches of the multi-path SV cascade. The technical scheme has the following effects:
by arranging a plurality of SV cascade access interval analog quantity on-site modules and controlling the switching mode thereof, the influence of the bus merging unit fault on the line protection, main transformer protection and bus differential voltage resetting locking functions is avoided, and the reliability of SV cascade is improved.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. An interval analog quantity local module multi-path SV cascade control method is characterized by comprising the following steps:
detecting a switching mode of a multi-path SV cascade;
when the multi-path SV cascade is in an automatic switching mode, controlling the multi-path SV cascade to control corresponding SV cascade output data according to a preset rule of the automatic switching mode;
and when the multi-path SV cascade is in a manual switching mode, controlling the corresponding SV cascade to transmit data according to the states of a plurality of manual switching switches of the multi-path SV cascade.
2. The spaced analog quantity in-place module multi-way SV cascade control method as recited in claim 1 wherein the multi-way SV cascade comprises: the SV1 cascade and the SV2 cascade;
the controlling of the corresponding SV cascade output data according to the preset rule of the automatic switching mode comprises the following steps:
judging whether the data of the SV1 cascade and the SV2 cascade are abnormal or not;
when the data of the SV1 cascade and the SV2 cascade are abnormal, the current data output state is kept;
when the data of the SV1 cascade or the SV2 cascade is abnormal, controlling the SV2 cascade or the SV1 cascade to output data;
when the data of the SV1 cascade and the SV2 cascade are normal, the SV1 cascade is controlled to output data.
3. The method for controlling the interval analog quantity in-place module multi-way SV cascade as claimed in claim 2, wherein before said determining whether the data of the SV1 cascade and the SV2 cascade are abnormal, further comprising:
judging whether the on-site module is in a maintenance state;
if the on-site module is in a maintenance state, controlling the SV1 cascade and the SV2 cascade to keep a current data output state;
and if the on-site module is not in a maintenance state, judging whether the data of the SV1 cascade and the SV2 cascade are abnormal.
4. The spaced analog in-place module multi-way SV cascade control method as claimed in claim 2, wherein said controlling the SV2 cascade or the SV1 cascade to output data when the data of the SV1 cascade or the SV2 cascade is abnormal comprises:
judging whether the normal duration of the SV2 cascade or the SV1 cascade data is greater than or equal to a preset time length;
when the normal duration of the SV2 cascade or the SV1 cascade data is greater than or equal to the preset duration, controlling the SV2 cascade or the SV1 cascade to output data;
and when the normal duration of the SV2 cascade data or the SV1 cascade data is less than the preset duration, keeping the current data output state.
5. The spaced analog quantity in-situ module multi-way SV cascade control method as recited in claim 2,
the data exceptions include: abnormal time mark sequence number, SV frame loss, invalid SV quality, abnormal SV interval and/or abnormal resampling point.
6. The spaced analog quantity in-situ module multi-way SV cascade control method as recited in claim 5,
the method for judging the abnormal time mark sequence number comprises the following steps: the method comprises the steps of serial number difference judgment, time mark difference judgment, quotient judgment of time mark serial numbers and/or remainder judgment of time mark serial numbers.
7. The spaced analog quantity in-situ module multi-way SV cascade control method as recited in claim 2,
when the data of the SV1 cascade and the SV2 cascade are detected to be abnormal, alarm information is sent out, and the current data output state is kept.
8. The spaced analog quantity in-place module multi-way SV cascade control method as recited in claim 1 wherein the multi-way SV cascade comprises: the SV1 cascade and the SV2 cascade;
the method for controlling the corresponding SV cascade transmission data according to the states of the multiple manual selector switches of the multi-path SV cascade comprises the following steps:
when a manual change-over switch of the SV1 cascade is switched on and a manual change-over switch of the SV2 cascade is switched off, controlling the SV1 cascade to transmit data;
when a manual change-over switch of the SV1 cascade is withdrawn and a manual change-over switch of the SV2 cascade is switched in, controlling the SV2 cascade to transmit data;
when a manual change-over switch of the SV1 cascade is switched on and a manual change-over switch of the SV2 cascade is switched on, controlling the SV1 cascade to transmit data;
and when the manual change-over switch of the SV1 cascade is withdrawn and the manual change-over switch of the SV2 cascade is switched, controlling the SV cascade to transmit data according to the automatic switching mode.
9. The spaced analog quantity in-situ module multi-way SV cascade control method as recited in any one of claims 1-8, further comprising:
and controlling the switching of the I bus or the II bus according to the position of the I bus and the position of the II bus.
10. The spaced analog quantity in-situ module multi-way SV cascade control method as recited in claim 9,
when the interval I female isolation knife is closed and the interval II female isolation knife is also closed, the output voltage is switched to the I female voltage;
when the interval I female isolation knife is closed and the interval II female isolation knife is opened, the output voltage is switched to the I female voltage;
when the interval I female isolation knife is disconnected and the interval II female isolation knife is closed, the output voltage is switched to the interval II female voltage;
when the interval I mother blade is disconnected and the interval II mother blade is also disconnected, the output voltage is 0.
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