CN118011275A - Automatic checking method and system for CT current virtual loop of main transformer protection bridge of inner bridge connection - Google Patents
Automatic checking method and system for CT current virtual loop of main transformer protection bridge of inner bridge connection Download PDFInfo
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Abstract
The invention discloses an automatic checking method and system for CT current virtual loop of an inner bridge connection main transformer protection bridge, wherein the method comprises the following steps: analyzing the SCD file, and performing standardization checking and modification to obtain a standardized IED information table; calculating the number of 110kV side outgoing line elements and the number of main transformers and the number of 110kV side circuit breakers in a main wiring; judging whether the main wiring type of the intelligent transformer substation is an inner bridge wiring or not; if the current is an internal bridge connection, analyzing the current polarity of three-phase protection current virtual terminals at the high-voltage bridge side of different main transformer protection in the SCD file; and (5) performing automatic verification on the CT current virtual loop of the main transformer protection bridge of the inner bridge connection. The invention solves the problems that the conventional SCD checking tool cannot automatically and accurately identify the internal bridge connection mode and cannot automatically check the correctness of the CT current virtual loop of the main transformer protection bridge, reduces the possibility of error detection and detection, and avoids the problems that secondary virtual loop hidden danger is caused and the main transformer protection is incorrect to act.
Description
Technical Field
The invention belongs to the technical field of substations, relates to a substation SCD file virtual circuit, and particularly relates to an automatic checking method and system for a CT current virtual circuit of an internal bridge connection main transformer protection bridge.
Background
The intelligent substation in the current stage adopts less internal bridge main wiring patterns, and is hardly researched by a virtual circuit verification method aiming at the intelligent substation in the internal bridge wiring patterns, and common virtual circuit verification tools can not judge the internal bridge wiring patterns correctly according to SCD files, so that the intelligent substation in the 110kV internal bridge wiring patterns does not have the function of verifying the correctness of the CT current virtual circuit of the main transformer protection bridge.
The patent with publication number CN108733928B discloses an automatic checking method of an SCD file virtual loop based on an intermediate model file, which models a wiring mode of a transformer substation in characteristic information of a checking template. The enumerated values of the substation wiring mode attributes comprise inner bridging lines, enlarged inner bridging lines and the like.
However, the method has two defects, namely, the main wiring pattern of the transformer substation is manually set, and the main wiring pattern, especially the main wiring pattern of the inner bridge, cannot be automatically judged through an SCD file; secondly, although a checking template and a checking rule are established, only a certain IED is used as a center to check the correctness of the peripheral virtual loop, for example, only the three-phase protection current polarity of the CT current loop of the main transformer protection bridge is consistent, and the virtual loop checking based on a certain IED section is not provided, for example, the correctness of the CT virtual loops of different main transformer protection bridges of the inner bridge connection line cannot be checked.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides an automatic checking method and an automatic checking system for a CT current virtual circuit of an internal bridge connection main transformer protection bridge.
The invention adopts the following technical scheme.
The first aspect of the invention provides an automatic checking method for a CT current virtual loop of an internal bridge connection main transformer protection bridge, which comprises the following steps:
s1: analyzing the SCD file, and performing standardization checking and modification to obtain a standardized IED information table;
s2: based on the IED information table, calculating the number of 110kV side outgoing line elements and the number of main transformers in the main wiring, and calculating the number of 110kV side circuit breakers;
s3: judging whether the main wiring pattern of the intelligent transformer station is an inner bridge wiring or not according to the number of 110kV side outgoing line elements, the number of main transformers and the number of 110kV side circuit breakers;
S4: if the intelligent transformer substation main wiring mode is an inner bridge wiring mode, analyzing current polarities of three-phase protection current virtual terminals at different main transformer protection high-voltage bridge sides in the SCD file;
s5: and automatically checking the CT current virtual circuit of the main transformer protection bridge of the inner bridge connection according to the current polarity and the three-phase protection current virtual circuit checking rule.
Preferably, the IED information table includes a name of the IED in the SCD file, a description of the IED in the SCD file, and a canonical name of the IED, wherein the canonical name of the IED includes an IED type, a home device type, a voltage class, a home device number, and an IED number.
Preferably, in S2, the number of 110kV side outgoing line elements is calculated by: collecting 110kV incoming line quantity corresponding to a circuit in an IED information table and 110kV incoming line quantity corresponding to a main transformer, and summing the 110kV incoming line quantity corresponding to the circuit and the 110kV incoming line quantity corresponding to the main transformer to obtain 110kV side incoming line element quantity;
the main transformer number is calculated in the following way: and collecting 110kV incoming line quantity corresponding to the main transformer in the IED information table as the main transformer quantity.
Preferably, the collection mode of 110kV incoming line quantity corresponding to the line is as follows: obtaining the maximum value of the attribution equipment number corresponding to the protection of the IED type, the line of the attribution equipment type and the 110kV of the voltage class in the IED information table, and taking the maximum value as the 110kV inlet wire number corresponding to the line;
the acquisition mode of 110kV inlet wire quantity corresponding to the main transformer is as follows: and obtaining the maximum value of the home equipment number corresponding to the protection, the home equipment type as the main transformer and the voltage class as 110kV inlet wire number corresponding to the main transformer in the IED information table.
Preferably, in S2, the number of circuit breakers at 110kV side is calculated by: and collecting the number of intelligent terminals and the number of merging units and intelligent terminal integrated devices in the IED information table, and summing the number of the intelligent terminals and the number of the merging units and the number of the intelligent terminal integrated devices to obtain the number of the 110kV side circuit breakers.
Preferably, the number of intelligent terminals is obtained by: traversing an IED information table, acquiring the belonging equipment type of the intelligent terminal with the IED type of 110kV, performing nuclear subtraction on the acquired belonging equipment type, removing the intelligent terminal with the belonging equipment type of bus and main transformer body, adding the maximum attribution equipment numbers of different belonging equipment types of the intelligent terminal after nuclear subtraction, and acquiring the quantity BI of the intelligent terminals;
The number of the merging units and the intelligent terminals in one device is obtained by the following steps: and traversing the IED information table, acquiring merging units and intelligent terminal unification devices, wherein the merging units and the intelligent terminal unification devices are of the type of the IED, the voltage class of the merging units corresponds to 110kV, adding the maximum attribution equipment numbers of the merging units and the intelligent terminal unification devices of different affiliated equipment types, and acquiring the number of the merging units and the intelligent terminal unification devices.
Preferably, in S3, the judging mode of whether the main connection mode of the intelligent substation is the inner bridge connection is as follows: judging whether the number of 110kV side outgoing line elements is 4, the number of 110kV side circuit breakers is 3 and the number of main variables is 2, if yes, the main wiring type is an inner bridge wire, and if not, the inner bridge wire is not the inner bridge wire.
Preferably, S4 specifically includes:
if the intelligent transformer station main wiring type is an inner bridge wiring, determining main transformer protection configuration according to an IED information table;
If the main transformer protection configuration is the double configuration of the main transformer protection of the main transformer and the rear integrated main transformer protection, analyzing and traversing descriptions of three-phase protection current virtual terminals of high-voltage bridge sides of all different sets of main transformer protection in the SCD file to obtain current polarities of the three-phase protection current virtual terminals of the high-voltage bridge sides of the main transformer protection;
if the main transformer protection configuration is divided into two sets of main backup protection configuration, analyzing and traversing descriptions of three-phase protection current virtual terminals at the high-voltage bridge side of all main transformer differential protection in the SCD file to obtain current polarities of the three-phase protection current virtual terminals at the high-voltage bridge side of the main transformer differential protection.
Preferably, in S5, the process of automatically checking the CT current virtual circuit of the main transformer protection bridge of the inner bridge line according to the current polarity and the three-phase protection current virtual circuit checking rule is as follows:
determining main transformer protection configuration according to the IED information table;
If the main transformer protection configuration is the double configuration of the main transformer protection of the main transformer and the rear integrated main transformer protection, when the three-phase protection current virtual terminals of the high-voltage bridge side of the main transformer protection of the main transformer #1 and the main transformer protection of the main transformer #2 are positive or reverse, the polarity errors of the three-phase protection current virtual terminals of the high-voltage bridge side are judged, the verification is not passed, and when the three-phase protection current virtual terminals of the corresponding sleeves of the main transformer protection of the main transformer #1 and the main transformer protection of the main transformer #2 are positive and reverse, the polarity errors of the three-phase protection current virtual terminals of the high-voltage bridge side are judged, and the verification is passed;
If the main transformer protection is configured as a separated double-sleeve configuration of the main backup protection, checking passing is carried out when the current polarity of the three-phase protection current virtual terminal at the high-voltage bridge side of the main transformer differential protection of the #1 is opposite to that of the three-phase protection current virtual terminal at the high-voltage bridge side of the main transformer differential protection of the #2, otherwise, checking failing.
The second aspect of the invention provides an automatic checking system for a CT current virtual loop of an internal bridge connection main transformer protection bridge, which comprises the following components:
The normalization module is used for analyzing the SCD file, checking and modifying the normalization to obtain an IED information table after normalization processing;
the calculation module is used for calculating the number of 110kV side outgoing line elements and the number of main transformers in the main wiring and calculating the number of 110kV side circuit breakers based on the IED information table;
The judging module is used for judging whether the main wiring pattern of the intelligent transformer substation is an inner bridge wiring or not according to the number of 110kV side outgoing line elements, the number of main transformers and the number of 110kV side circuit breakers;
the analysis module is used for analyzing the current polarity of the three-phase protection current virtual terminals at the high-voltage bridge side of different main transformer protection in the SCD file if the main wiring type of the intelligent transformer substation is an inner bridge wiring;
and the verification module is used for automatically verifying the CT current virtual circuit of the main transformer protection bridge of the inner bridge connection according to the current polarity and the three-phase protection current virtual circuit verification rule.
A terminal comprising a processor and a storage medium; the storage medium is used for storing instructions;
The processor is configured to operate in accordance with the instructions to perform the steps of the method.
A computer readable storage medium having stored thereon a computer program which when executed by a processor realizes the steps of the method.
Compared with the prior art: the beneficial effects of the invention at least comprise:
according to the invention, the automatic identification of the internal bridge connection type of the transformer substation is realized by analyzing the IED information in the SCD file, and the automatic verification of the CT current virtual loop of the main transformer protection bridge of the intelligent station of the 110kV internal bridge connection is realized by analyzing the current polarity information of the virtual terminals of different main transformer protection high-voltage bridges, so that the problems that the conventional SCD verification tool cannot automatically and accurately identify the internal bridge connection mode and cannot automatically verify the correctness of the CT current virtual loop of the main transformer protection bridge are solved, the possibility of error detection and detection is reduced, the hidden danger of secondary virtual loops is avoided, and the incorrect action of the main transformer protection is further caused.
According to the method, the SCD file is analyzed, the standardization checking and the standardization modifying are carried out, the standardized IED information table is obtained, the problem that the SCD file of the intelligent station is not standardized in manufacture in the early stage is solved through the standardized IED information table, and technical support can be provided for automatically identifying the main wiring pattern of the inner bridge.
According to the intelligent transformer substation main wiring type is judged whether to be an inner bridge wiring according to the number of 110kV side outgoing line elements, the number of main transformers and the number of 110kV side circuit breakers, the number of primary equipment to which the transformer substation belongs is calculated by analyzing the standardized IED name from an SCD file, and the inner bridge wiring type is accurately identified from the professional angle of an electric power system.
When the main wiring type of the intelligent transformer substation is an inner bridge wiring, the current polarity of three-phase protection current virtual terminals on the high-voltage bridge side of different main transformer protection in the SCD file is analyzed, and specific main transformer protection device types are selected for different main transformer protection configuration schemes; meanwhile, automatic checking of the CT current virtual circuit of the main transformer protection bridge of the inner bridge wire is carried out according to the current polarity and three-phase protection current virtual circuit checking rule, virtual circuit checking based on the section of the inner bridge is provided for the first time, and the method is used for checking the correctness of the CT current virtual circuit of the main transformer protection bridge of the inner bridge wire.
Drawings
FIG. 1 is a flow chart of a verification method of the present invention;
fig. 2 is a main wiring diagram of the intelligent station for the 110kV inner bridge wiring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. The described embodiments of the application are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art without inventive faculty, are within the scope of the application, based on the spirit of the application.
The embodiment 1 of the invention provides an automatic verification method for a CT three-phase protection current virtual loop of a 110kV inner bridge connection intelligent station main transformer protection bridge, wherein fig. 1 is a flow chart of a verification method corresponding to the embodiment 1, fig. 2 is a main connection chart of the 110kV inner bridge connection intelligent station corresponding to the embodiment 1, and the method comprises the following steps:
S1, analyzing an SCD file, and performing standardization checking and modification to obtain an IED information table after standardization processing;
Specifically: and analyzing the SCD file to form an IED information table, performing normalization check, prompting the name of the unnormal IED, and performing normalization modification.
The name normative checking of the IED includes the following:
a) The name and description desc of the IED should ensure that the total station is unique;
b) The name of the IED is composed of 8-bit legal visual characters in 5 parts, representing respectively: IED type, home device type, voltage class, home device number, IED number;
c) The IED description desc is named by the substation master scheduling authority using scheduling naming.
The name normative modification of the IED includes the following:
Modifying the name of the IED which does not meet the normalization requirement of the name of the IED in the b) in the step, and performing normalization check after modification until meeting the requirement.
According to the above steps, the SCD file is parsed, and normative checking and modification are performed, so as to form a standardized IED information table, where the standardized IED information table includes a name of the IED in the SCD file, a description desc of the IED in the SCD file, and a normative name of the IED, and the standardized IED information table is specifically shown in table 1, where column data corresponding to the IED name in the SCD file is an element attribute value in the SCD file structure, that is, a name before the normalization is performed.
Table 1 normalized IED information table
S2, calculating the number of 110kV side outgoing line elements and the number of main transformers in a main wiring based on the IED information table, and calculating the number of 110kV side circuit breakers;
S2.1, calculating the number of 110kV side outgoing line elements in a main wiring according to the standardized IED information table;
S2.1.1, traversing all IED information tables which pass through the normative checking, obtaining the home equipment numbers corresponding to the protection of the IED type, the circuit of the home equipment type and the 110kV voltage class in the normative name of the IED, and taking the 110kV incoming line number NL corresponding to the circuit as the maximum value of the numbers.
S2.1.2, traversing all IED information tables which pass through the normative checking, obtaining the home equipment numbers corresponding to the protection of the IED type, the main transformer of the home equipment type and the 110kV voltage class in the normative name of the IED, and taking the 110kV incoming line number NT and the main variable number corresponding to the main transformer as the maximum value of the numbers.
S2.1.3, the 110kV side outlet element number n=nl+nt is calculated.
In this embodiment, the number of 110kV side outgoing line elements in the main wiring is counted from the normalized IED information table shown in table 1, as shown in the following table 2:
Table 2 IED information table of 110kV voltage class protection device
As can be seen from table 2 above, there are 2 110kV lines spaced apart, namely 110kV south lake line and 110kV pool south line, and the standard names name of the IED corresponding to 110kV line protection are p_l1101 and p_l1102, respectively, and the number of the attribution device is a maximum value of 02, namely nl=2;
The number of main transformers is 2, namely a #1 main transformer and a #2 main transformer, the number of main variables is 2, the specification names name of the IEDs corresponding to the main transformer protection are p_t1101A, P _t1101B, P _t1102A, P _t1102B, and the maximum value of the home equipment number is 02, namely NT=2.
To sum up, the 110kV side outgoing line element number n=nl+nt=2+2=4.
S2.2, calculating the number of the 110kV side circuit breakers based on the normalized IED information table:
S2.2.1, traversing all IED information tables which pass through the normative checking, obtaining the belonging equipment types of the intelligent terminals with the IED types of the intelligent terminals and the voltage class of 110kV in the normative name of the IED, performing nuclear subtraction on the obtained belonging equipment types, removing the intelligent terminals with the belonging equipment types of buses and corresponding main transformer bodies, and adding according to the maximum belonging equipment numbers of different belonging equipment types of the intelligent terminals after nuclear subtraction, thereby obtaining the quantity BI of the intelligent terminals.
The intelligent terminals with the same home equipment type, the same home equipment number and different IED numbers are counted only once, the intelligent terminals with the home equipment type as buses are not considered, the main transformer body intelligent terminals are not considered, and the sum of the numbers of all the intelligent terminals after the accounting is subtracted is BI.
S2.2.2, traversing all IED information tables passing through normalization inspection, obtaining an IED type in a normalized name of the IED as a merging unit and an intelligent terminal integrating device (corresponding to a name of a merging terminal in an SCD file), and counting the number of the merging unit and the intelligent terminal integrating device corresponding to a voltage class of 110kV, namely adding the maximum attribution equipment numbers of different affiliated equipment types of the merging unit and the intelligent terminal integrating device, and obtaining the number BMI of the merging unit and the intelligent terminal integrating device.
Specifically, the merging units and the intelligent terminal unification devices with the same home equipment type, the same home equipment number and different IED numbers are counted only once, and the sum of the numbers of all the merging units and the intelligent terminal unification devices is taken as BMI.
S2.2.3, the 110kV side breaker number b=bi+bmi is calculated.
In this embodiment, the 110kV voltage class intelligent terminal, and the merging unit and intelligent terminal integrated device information are counted from the normalized IED information table, as shown in table 3 below.
Table 3 110kV voltage class intelligent terminal, merging unit and intelligent terminal integrated device information table
As can be seen from table 3, there are 2 main transformer intervals, namely, a #1 main transformer and a #2 main transformer, and the standard names name of the IEDs of the intelligent terminals corresponding to the main transformer body are respectively INT1101 and INT1102, and the intelligent terminals of the main transformer body do not participate in the statistics of the number of intelligent terminals. The number of 110kV buses is 2, only 1 set of 110kV bus intelligent terminals are actually configured, and the bus intelligent terminals do not participate in the quantity statistics of the intelligent terminals. From this, the number of intelligent terminals bi=2+1-2-1=0 in the station.
The number of 110kV lines is 2, namely 110kV south lake lines and 110kV pool south lines respectively, the standard names name of IEDs of merging units corresponding to the lines and intelligent terminal integrated devices (corresponding to the names of merging terminals in SCD files) are MIL1101A, MIL1101B, MIL A and MIL1102B respectively, the maximum value of the number of attribution equipment is 02, and the number of merging units corresponding to the lines and the intelligent terminal integrated devices is 2;110kV segments are separated by 1, the standard names name of the IEDs of the merging units and the intelligent terminal unification devices corresponding to the segments are MIK1101A, MIK B, the maximum value of the number of the attribution equipment is 01, and the number of the merging units and the intelligent terminal unification devices corresponding to the segments is 1; accordingly, the number of merging units and intelligent terminals in the station bm=2+1=3. To sum up, b=bi+bmi=0+2+1=3.
S3, judging whether the intelligent transformer substation main wiring pattern is an inner bridge wiring or not based on the number N of 110kV side outgoing line elements, the number B of 110kV side circuit breakers and the main variable number; the judging method comprises the following steps: judging whether the number of 110kV side outgoing line elements is 4, the number of 110kV side circuit breakers is 3 and the number of main variables is 2, if yes, the main wiring type is an inner bridge wire, otherwise, the main wiring type is not an inner bridge wire, and the main wiring type is specific:
If the number of 110kV side outgoing line elements N=4 and the number of 110kV side circuit breakers B=3, and the number of main transformers is 2, the main wiring type is an inner bridge wiring;
If the number of 110kV side outgoing line elements N=5 and the number of 110kV side circuit breakers B=4, and the number of main transformers is 2, the main wiring mode is three-incoming-line two-main transformer enlarged inner bridge wiring;
if the number of 110kV side outgoing line elements N=5 and the number of 110kV side circuit breakers B=4, and the number of main transformers is 3, the main wiring mode is two-incoming line three-main transformer enlarged inner bridge wiring;
and automatically determining the main wiring pattern of the 110kV intelligent transformer substation as an inner bridge wiring according to the calculated 110kV side outgoing line element number N and 110kV side breaker number B, N=4 and B=3 and the main transformer number as 2.
S4, after determining that the intelligent transformer substation main wiring pattern is an inner bridge wiring pattern according to the S3, analyzing three-phase protection current virtual loop information of different main transformer protection high-voltage bridge sides in the SCD file, wherein the three-phase protection current virtual loop information mainly refers to three-phase protection current polarities in the high-voltage bridge side virtual terminals, and specifically comprises the following steps:
S4.1, determining main transformer protection configuration according to an IED information table; the main transformer protection configuration is divided into a main-rear integrated main transformer protection double configuration and a main-backup protection separated double configuration;
s4.2, traversing the current polarities of three-phase protection current virtual terminals of high-voltage bridge sides of all different sets of main transformer protection when the main transformer protection is configured into the double configuration of main transformer protection integrated after the main transformer protection, marking the current polarities of the three-phase protection current virtual terminals of the high-voltage bridge sides of the main transformer protection as 0 when the description of the three-phase protection current virtual terminals of the high-voltage bridge sides of the main transformer protection contains positive, and marking the current polarities of the three-phase protection current virtual terminals of the high-voltage bridge sides of the main transformer protection as 1 when the description of the three-phase protection current virtual terminals of the high-voltage bridge sides of the main transformer protection contains negative; it is understood that the description of the three-phase protection current virtual terminals on the high-voltage bridge side is in the SCD document.
S4.3, when the main transformer protection is configured into a main backup protection split double-sleeve configuration (one sleeve is a main transformer differential protection and the other sleeve is a main transformer backup protection), traversing the current polarities of the three-phase protection current virtual terminals at the high-voltage bridge side of all the main transformer differential protection, marking the current polarities of the three-phase protection current virtual terminals at the high-voltage bridge side of the main transformer differential protection as 0 when the description of the three-phase protection current virtual terminals at the high-voltage bridge side of the main transformer differential protection contains positive, and marking the current polarities of the three-phase protection current virtual terminals at the high-voltage bridge side of the main transformer differential protection as 1 when the description of the three-phase protection current virtual terminals at the high-voltage bridge side of the main transformer differential protection contains negative;
the three-phase protection current virtual terminals of the high-voltage bridge side of the main transformer protection comprise a three-phase protection current virtual terminal of the high-voltage side 2 side, a three-phase protection current virtual terminal of the high-voltage bridge 2 and the like.
In particular, when the main-transformer protection configuration is a split-main-backup protection double-set configuration, the main-transformer backup protection current does not generally use the high-voltage bridge side current.
And S5, automatically checking the CT current virtual circuit of the main transformer protection bridge of the inner bridge connection according to the current polarity and the three-phase protection current virtual circuit checking rule.
Only one group of bridge CT (used for measuring three-phase protection current) at the side of the default 110kV high-voltage bridge is configured, and the P1 pointing bridge breaker of the bridge CT at the side of the 110kV high-voltage bridge is positive, so that a set of three-phase protection current virtual loop verification rule of main transformer protection is formulated:
When the main transformer protection is configured as a double configuration of the main transformer protection of the integrated main transformer after the main transformer, the main transformer protection comprises a #1 main transformer protection (comprising a #1 main transformer protection A sleeve and a #1 main transformer protection B sleeve) and a #2 main transformer protection (comprising a #2 main transformer protection A sleeve and a #2 main transformer protection B sleeve).
If the current polarities of the three-phase protection current virtual terminals on the high-voltage bridge sides of the #1 main transformer protection A sleeve and the #1 main transformer protection B sleeve are the same, the current polarities of the three-phase protection current virtual terminals on the high-voltage bridge sides of the #2 main transformer protection A sleeve and the #2 main transformer protection B sleeve are the same, the current polarities of the three-phase protection current virtual terminals on the high-voltage bridge sides of the #1 main transformer protection A sleeve and the #1 main transformer protection B sleeve are opposite to the current polarities of the three-phase protection current virtual terminals on the high-voltage bridge sides of the #2 main transformer protection A sleeve and the #2 main transformer protection B sleeve, checking to pass, otherwise, checking to fail.
Based on the verification rule, the polarity correctness verification of the three-phase protection current virtual terminal at the high-voltage bridge side of main transformer protection can be performed: the three-phase protection current virtual terminals of the high-voltage bridge side of the main transformer protection #1 and the main transformer protection #2 are positive or reverse in polarity, the polarity error of the three-phase protection current virtual terminals of the high-voltage bridge side is judged, the three-phase protection current virtual terminals corresponding to the main transformer protection #1 and the main transformer protection #2 are positive and reverse in polarity respectively, and the correct polarity of the three-phase protection current virtual terminals of the high-voltage bridge side is judged.
When the main transformer protection is configured in a split double-set configuration (one set is main transformer differential protection (comprising #1 main transformer differential protection and #2 main transformer differential protection) and the other set is main transformer backup protection), checking that the current polarity of the three-phase protection current virtual terminal at the high-voltage bridge side of the #1 main transformer differential protection is opposite to the current polarity of the three-phase protection current virtual terminal at the high-voltage bridge side of the #2 main transformer differential protection, if the current polarity of the three-phase protection current virtual terminal at the high-voltage bridge side of the #1 main transformer differential protection is opposite to the current polarity of the three-phase protection current virtual terminal at the high-voltage bridge side of the #2 main transformer differential protection, checking that the current polarity of the three-phase protection current virtual terminal at the high-voltage bridge side of the #1 main transformer differential protection is passed, otherwise, checking that the current polarity of the three-phase protection current virtual terminal at the high-voltage bridge side of the #2 main transformer differential protection is not passed.
In this embodiment, as can be seen from table 1, the station main transformer protection configuration is a double configuration of the main and post-main integrated main transformer protection.
By analyzing input information in LN0 logic nodes under M1 nodes in #1 and #2 main transformer protection models in SCD files, it is known that three-phase protection currents on high-voltage bridge sides of a #1 main transformer protection A sleeve and a #1 main transformer protection B sleeve adopt virtual terminals to describe positive, three-phase protection currents on high-voltage bridge sides of the #2 main transformer protection A sleeve and the #2 main transformer protection B sleeve adopt virtual terminals to describe negative, and the three-phase protection currents can be marked as 0 and 1 in verification. And judging that the polarity of the three-phase protection current virtual terminal at the high-voltage bridge side is correct, and checking to pass.
The embodiment 2 of the invention provides an automatic checking system for a CT current virtual loop of an internal bridge connection main transformer protection bridge, which comprises the following components:
The normalization module is used for analyzing the SCD file, checking and modifying the normalization to obtain an IED information table after normalization processing;
the calculation module is used for calculating the number of 110kV side outgoing line elements and the number of main transformers in the main wiring and calculating the number of 110kV side circuit breakers based on the IED information table;
The judging module is used for judging whether the main wiring pattern of the intelligent transformer substation is an inner bridge wiring or not according to the number of 110kV side outgoing line elements, the number of main transformers and the number of 110kV side circuit breakers;
the analysis module is used for analyzing the current polarity of the three-phase protection current virtual terminals at the high-voltage bridge side of different main transformer protection in the SCD file if the main wiring type of the intelligent transformer substation is an inner bridge wiring;
and the verification module is used for automatically verifying the CT current virtual circuit of the main transformer protection bridge of the inner bridge connection according to the current polarity and the three-phase protection current virtual circuit verification rule.
The embodiment 3 of the invention provides a terminal, which comprises a processor and a storage medium, wherein the storage medium is used for storing instructions; the processor is operative to perform the steps of the method of embodiment 1 in accordance with the instructions.
Embodiment 4 of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method described in embodiment 1.
The invention has the beneficial effects that compared with the prior art:
according to the invention, the automatic identification of the internal bridge connection type of the transformer substation is realized by analyzing the IED information in the SCD file, and the automatic verification of the CT current virtual loop of the main transformer protection bridge of the intelligent station of the 110kV internal bridge connection is realized by analyzing the current polarity information of the virtual terminals of different main transformer protection high-voltage bridges, so that the problems that the conventional SCD verification tool cannot automatically and accurately identify the internal bridge connection mode and cannot automatically verify the correctness of the CT current virtual loop of the main transformer protection bridge are solved, the possibility of error detection and detection is reduced, the hidden danger of secondary virtual loops is avoided, and the incorrect action of the main transformer protection is further caused.
According to the method, the SCD file is analyzed, the standardization checking and the standardization modifying are carried out, the standardized IED information table is obtained, the problem that the SCD file of the intelligent station is not standardized in manufacture in the early stage is solved through the standardized IED information table, and technical support can be provided for automatically identifying the main wiring pattern of the inner bridge.
According to the intelligent transformer substation main wiring type is judged whether to be an inner bridge wiring according to the number of 110kV side outgoing line elements, the number of main transformers and the number of 110kV side circuit breakers, the number of primary equipment to which the transformer substation belongs is calculated by analyzing the standardized IED name from an SCD file, and the inner bridge wiring type is accurately identified from the professional angle of an electric power system.
When the main wiring type of the intelligent transformer substation is an inner bridge wiring, the current polarity of three-phase protection current virtual terminals on the high-voltage bridge side of different main transformer protection in the SCD file is analyzed, and specific main transformer protection device types are selected for different main transformer protection configuration schemes; meanwhile, automatic checking of the CT current virtual circuit of the main transformer protection bridge of the inner bridge wire is carried out according to the current polarity and three-phase protection current virtual circuit checking rule, virtual circuit checking based on the section of the inner bridge is provided for the first time, and the method is used for checking the correctness of the CT current virtual circuit of the main transformer protection bridge of the inner bridge wire.
The present disclosure may be a system, method, and/or computer program product. The computer program product may include a computer readable storage medium having computer readable program instructions embodied thereon for causing a processor to implement aspects of the present disclosure.
The computer readable storage medium may be a tangible device that can hold and store instructions for use by an instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: portable computer disks, hard disks, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static Random Access Memory (SRAM), portable compact disk read-only memory (CD-ROM), digital Versatile Disks (DVD), memory sticks, floppy disks, mechanical coding devices, punch cards or in-groove structures such as punch cards or grooves having instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media, as used herein, are not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., optical pulses through fiber optic cables), or electrical signals transmitted through wires.
The computer readable program instructions described herein may be downloaded from a computer readable storage medium to a respective computing/processing device or to an external computer or external storage device over a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmissions, wireless transmissions, routers, firewalls, switches, gateway computers and/or edge servers. The network interface card or network interface in each computing/processing device receives computer readable program instructions from the network and forwards the computer readable program instructions for storage in a computer readable storage medium in the respective computing/processing device.
The computer program instructions for performing the operations of the present disclosure may be assembly instructions, instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as SMALLTALK, C ++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer readable program instructions may be executed entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, aspects of the present disclosure are implemented by personalizing electronic circuitry, such as programmable logic circuitry, field Programmable Gate Arrays (FPGAs), or Programmable Logic Arrays (PLAs), with state information of computer readable program instructions, which can execute the computer readable program instructions.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (12)
1. An automatic checking method for a CT current virtual loop of an inner bridge connection main transformer protection bridge is characterized by comprising the following steps:
s1: analyzing the SCD file, and performing standardization checking and modification to obtain a standardized IED information table;
s2: based on the IED information table, calculating the number of 110kV side outgoing line elements and the number of main transformers in the main wiring, and calculating the number of 110kV side circuit breakers;
s3: judging whether the main wiring pattern of the intelligent transformer station is an inner bridge wiring or not according to the number of 110kV side outgoing line elements, the number of main transformers and the number of 110kV side circuit breakers;
S4: if the intelligent transformer substation main wiring mode is an inner bridge wiring mode, analyzing current polarities of three-phase protection current virtual terminals at different main transformer protection high-voltage bridge sides in the SCD file;
s5: and automatically checking the CT current virtual circuit of the main transformer protection bridge of the inner bridge connection according to the current polarity and the three-phase protection current virtual circuit checking rule.
2. The automatic checking method for the CT current virtual loop of the main transformer protection bridge of the inner bridge connection line according to claim 1 is characterized in that:
The IED information table comprises names of IEDs in the SCD file, IED descriptions in the SCD file, and canonical names of the IEDs, wherein the canonical names of the IEDs comprise IED types, home device types, voltage levels, home device numbers and IED numbers.
3. The automatic checking method for the CT current virtual loop of the main transformer protection bridge of the inner bridge wire according to claim 2, which is characterized in that:
In S2, the number of 110kV side outgoing line elements is calculated in the following manner: collecting 110kV incoming line quantity corresponding to a circuit in an IED information table and 110kV incoming line quantity corresponding to a main transformer, and summing the 110kV incoming line quantity corresponding to the circuit and the 110kV incoming line quantity corresponding to the main transformer to obtain 110kV side incoming line element quantity;
the main transformer number is calculated in the following way: and collecting 110kV incoming line quantity corresponding to the main transformer in the IED information table as the main transformer quantity.
4. The automatic checking method for the CT current virtual circuit of the main transformer protection bridge of the inner bridge connection wire according to claim 3, wherein the method comprises the following steps:
The acquisition mode of 110kV inlet wire quantity that the circuit corresponds is: obtaining the maximum value of the attribution equipment number corresponding to the protection of the IED type, the line of the attribution equipment type and the 110kV of the voltage class in the IED information table, and taking the maximum value as the 110kV inlet wire number corresponding to the line;
the acquisition mode of 110kV inlet wire quantity corresponding to the main transformer is as follows: and obtaining the maximum value of the home equipment number corresponding to the protection, the home equipment type as the main transformer and the voltage class as 110kV inlet wire number corresponding to the main transformer in the IED information table.
5. The automatic checking method for the CT current virtual loop of the main transformer protection bridge of the inner bridge wire according to claim 2, which is characterized in that:
In S2, the number of the 110kV side circuit breakers is calculated in the following manner: and collecting the number of intelligent terminals and the number of merging units and intelligent terminal integrated devices in the IED information table, and summing the number of the intelligent terminals and the number of the merging units and the number of the intelligent terminal integrated devices to obtain the number of the 110kV side circuit breakers.
6. The automatic checking method for the CT current virtual circuit of the main transformer protection bridge of the inner bridge wire according to claim 5, wherein the method comprises the following steps:
the acquisition mode of the intelligent terminal number is as follows: traversing an IED information table, acquiring the belonging equipment type of the intelligent terminal with the IED type of 110kV, performing nuclear subtraction on the acquired belonging equipment type, removing the intelligent terminal with the belonging equipment type of bus and main transformer body, adding the maximum attribution equipment numbers of different belonging equipment types of the intelligent terminal after nuclear subtraction, and acquiring the quantity BI of the intelligent terminals;
The number of the merging units and the intelligent terminals in one device is obtained by the following steps: and traversing the IED information table, acquiring merging units and intelligent terminal unification devices, wherein the merging units and the intelligent terminal unification devices are of the type of the IED, the voltage class of the merging units corresponds to 110kV, adding the maximum attribution equipment numbers of the merging units and the intelligent terminal unification devices of different affiliated equipment types, and acquiring the number of the merging units and the intelligent terminal unification devices.
7. The automatic checking method for the CT current virtual loop of the main transformer protection bridge of the inner bridge connection line according to claim 1 is characterized in that:
In S3, the judging mode of whether the intelligent transformer substation main wiring mode is an inner bridge wiring mode is as follows: judging whether the number of 110kV side outgoing line elements is 4, the number of 110kV side circuit breakers is 3 and the number of main variables is 2, if yes, the main wiring type is an inner bridge wire, and if not, the inner bridge wire is not the inner bridge wire.
8. The automatic checking method for the CT current virtual loop of the main transformer protection bridge of the inner bridge connection line according to claim 1 is characterized in that:
s4 specifically comprises the following steps:
if the intelligent transformer station main wiring type is an inner bridge wiring, determining main transformer protection configuration according to an IED information table;
If the main transformer protection configuration is the double configuration of the main transformer protection of the main transformer and the rear integrated main transformer protection, analyzing and traversing descriptions of three-phase protection current virtual terminals of high-voltage bridge sides of all different sets of main transformer protection in the SCD file to obtain current polarities of the three-phase protection current virtual terminals of the high-voltage bridge sides of the main transformer protection;
if the main transformer protection configuration is divided into two sets of main backup protection configuration, analyzing and traversing descriptions of three-phase protection current virtual terminals at the high-voltage bridge side of all main transformer differential protection in the SCD file to obtain current polarities of the three-phase protection current virtual terminals at the high-voltage bridge side of the main transformer differential protection.
9. The automatic checking method for the CT current virtual loop of the main transformer protection bridge of the inner bridge connection line according to claim 1 is characterized in that:
s5, the process of automatically checking the CT current virtual circuit of the main transformer protection bridge of the inner bridge connection according to the current polarity and the three-phase protection current virtual circuit checking rule is as follows:
determining main transformer protection configuration according to the IED information table;
If the main transformer protection configuration is the double configuration of the main transformer protection of the main transformer and the rear integrated main transformer protection, when the three-phase protection current virtual terminals of the high-voltage bridge side of the main transformer protection of the main transformer #1 and the main transformer protection of the main transformer #2 are positive or reverse, the polarity errors of the three-phase protection current virtual terminals of the high-voltage bridge side are judged, the verification is not passed, and when the three-phase protection current virtual terminals of the corresponding sleeves of the main transformer protection of the main transformer #1 and the main transformer protection of the main transformer #2 are positive and reverse, the polarity errors of the three-phase protection current virtual terminals of the high-voltage bridge side are judged, and the verification is passed;
If the main transformer protection is configured as a separated double-sleeve configuration of the main backup protection, checking passing is carried out when the current polarity of the three-phase protection current virtual terminal at the high-voltage bridge side of the main transformer differential protection of the #1 is opposite to that of the three-phase protection current virtual terminal at the high-voltage bridge side of the main transformer differential protection of the #2, otherwise, checking failing.
10. An automatic checking system for CT current virtual circuit of main transformer protection bridge of inner bridge line, using the method of any one of claims 1-9, characterized in that the system comprises:
The normalization module is used for analyzing the SCD file, checking and modifying the normalization to obtain an IED information table after normalization processing;
the calculation module is used for calculating the number of 110kV side outgoing line elements and the number of main transformers in the main wiring and calculating the number of 110kV side circuit breakers based on the IED information table;
The judging module is used for judging whether the main wiring pattern of the intelligent transformer substation is an inner bridge wiring or not according to the number of 110kV side outgoing line elements, the number of main transformers and the number of 110kV side circuit breakers;
the analysis module is used for analyzing the current polarity of the three-phase protection current virtual terminals at the high-voltage bridge side of different main transformer protection in the SCD file if the main wiring type of the intelligent transformer substation is an inner bridge wiring;
and the verification module is used for automatically verifying the CT current virtual circuit of the main transformer protection bridge of the inner bridge connection according to the current polarity and the three-phase protection current virtual circuit verification rule.
11. A terminal comprising a processor and a storage medium; the method is characterized in that:
the storage medium is used for storing instructions;
The processor being operative according to the instructions to perform the steps of the method according to any one of claims 1-9.
12. Computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the steps of the method according to any one of claims 1-9.
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| CN102023271A (en) * | 2010-11-25 | 2011-04-20 | 河南省电力公司洛阳供电公司 | Spare power automatic switching logic test method for verifying automatic switching modes of high voltage side buscouple switch |
| CN106445718A (en) * | 2016-09-23 | 2017-02-22 | 国网江苏省电力公司 | Automatic checking method for SCD file virtual loop |
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