CN111274206A

CN111274206A - Transformer substation reconstruction, expansion and overhaul test boundary determination method based on minimum sub CRC code

Info

Publication number: CN111274206A
Application number: CN202010046543.2A
Authority: CN
Inventors: 张永伍; 杨宝林; 孙沛川; 李大勇; 马红翔; 李伟; 王洋; 杨畅; 黄毅; 袁中琛; 殷学功; 林蒙; 江滔; 甄家林; 杨经超
Original assignee: State Grid Tianjin Electric Power Co Ltd; Electric Power Research Institute of State Grid Tianjin Electric Power Co Ltd
Current assignee: State Grid Tianjin Electric Power Co Ltd; Electric Power Research Institute of State Grid Tianjin Electric Power Co Ltd
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2020-06-12
Anticipated expiration: 2040-01-16
Also published as: CN111274206B

Abstract

The invention relates to a substation reconstruction and expansion overhaul test boundary determining method based on a minimum sub CRC code, which comprises the following steps of: step 1, calculating a sub CRC code under an access point G and a sub CRC code under an access point M; step 2, determining newly added IEDs, deleting IEDs and overhauling IEDs; step 3, for the newly added IED, determining a direct association IED and an indirect association IED; step 4, determining a test boundary for the directly associated IED of the newly added IED; step 5, for the overhaul IED, determining a direct association IED and an indirect association IED; and 6, determining a test boundary for the directly associated IED of the overhaul IED. The invention can limit the test range in the maintenance and reconstruction and extension to the minimum, thereby shortening the maintenance time, reducing the maintenance difficulty and improving the maintenance accuracy.

Description

Transformer substation reconstruction, expansion and overhaul test boundary determination method based on minimum sub CRC code

Technical Field

The invention belongs to the technical field of secondary overhaul, operation and maintenance of intelligent substations, relates to a reconstruction and extension of an intelligent substation and a method for determining an overhaul test boundary, and particularly relates to a transformer substation reconstruction and extension overhaul test boundary determining method based on a minimum sub CRC code.

Background

At present, a large number of intelligent substations are put into operation, and as the power demand increases, substation reconstruction and extension work is often carried out, such as newly-added line intervals or newly-added transformer intervals, and corresponding IEDs such as protection, merging units, intelligent terminals, measurement and control and the like are secondarily added while primary equipment is newly added; in addition, the defect elimination and the overhaul of the relay protection equipment in the operation and maintenance of the transformer substation are more normal work. Compared with the traditional transformer substation, the cable is replaced by the optical cable of the intelligent transformer substation, the electric signal transmission of analog quantity and switching value is replaced by IEC61850 digital message transmission, and the cable connection between the devices is replaced by invisible and untouchable virtual loops. And (3) newly-added IEDs are rebuilt or defect repair IEDs are removed, whether the IEDs (directly-associated IEDs) associated with the virtual connections of the IEDs need to be tested or not, if the IEDs are required to be tested, the IEDs (indirectly-associated IEDs) associated with the IEDs are directly associated, if the IEDs are required to be tested, whether the IEDs need to be shut down for testing or not, and if the IEDs are required to be tested. Such as: the method comprises the following steps of 220kV or 110kV double-bus wiring, newly-added line intervals, secondary newly-added line protection, merging units and intelligent terminals, virtual connection between bus protection and newly-added IEDs is added, bus protection configuration files (CCD files or TXT and other factory private configuration files) need to be installed again, bus protection needs to be subjected to power failure testing, however, whether power failure transmission testing needs to be carried out on the original operation intervals by the bus protection, the number of the original operation intervals is large, and continuity of power supply of the operation intervals is affected if the power failure testing needs to be carried out. The dual configuration protection can adopt a method of stopping one set of protection, disconnecting an intelligent terminal outlet pressure plate and protecting transmission to an intelligent terminal outlet contact, but the workload is large, the operation risk is high, and for a single set of 110kV configuration, power failure of each spacing wheel is required to carry out transmission. In addition, the bus merging unit is cascaded to a newly-added 220kV line merging unit, and whether the bus merging unit needs to be tested or not is determined. And if the 500kV incomplete string is expanded into a complete string, IEDs such as line protection, side switch protection and the like are newly added, the middle switch protection configuration file is downloaded again, and whether the side switch protection and the line protection in the original operation need to be tested or not is determined. Just because the virtual circuit of the intelligent substation is invisible, untouchable and complex, the virtual circuit is not only related to virtual connection, but also related to a communication data model. Therefore, the existing more reconstruction and extension operation modes adopt that the whole bus is powered off or each interval wheel on the bus is powered off for transmission at 220 kV; 500kV adopts the mode of whole interval power failure.

If the reconstruction and extension are carried out simultaneously with the secondary overhaul, the incidence relation among IEDs is more complex, and if the testing boundary and the operation mode are determined by completely depending on the experience of people or by looking up SCD files by people, the difficulty is very high, the subjectivity is strong, and the correctness is difficult to completely ensure. Therefore, whether a test boundary can be automatically given, the test range is reduced to the minimum, and the power failure range is reduced to the minimum is a technical problem to be solved urgently by technical personnel in the field in the current reconstruction, extension and overhaul operations of the intelligent substation.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a transformer substation reconstruction and extension test boundary determining method based on the minimum sub CRC code, which can limit the test range in the reconstruction and extension to be minimum, thereby shortening the repair time, reducing the repair difficulty and improving the repair accuracy.

The invention solves the practical problem by adopting the following technical scheme:

a transformer substation reconstruction and expansion overhaul test boundary determining method based on a minimum sub CRC code comprises the following steps:

step 1, importing and analyzing an SCD file before reconstruction, expansion and maintenance and an SCD file after reconstruction, expansion and maintenance, calculating GOOSE subscription sub CRC code SGRCi and issuing sub CRC code SGTCRCi according to an access point G of a process layer under each IED node, and calculating SMV subscription sub CRC code SMRCi and issuing sub CRC code SMTCRCi under an M access point for the two SCD files before reconstruction, expansion and maintenance;

step 2, comparing the two SCD files before and after reconstruction and expansion, and determining to add an IED, delete the IED and overhaul the IED;

step 3, searching each newly-added IED 1-IEDn, wherein each newly-added IED has a direct virtual connection relation with the newly-added IED and is a non-newly-added IED, the newly-added IED is a directly-associated IED, and the directly-associated IED is searched for an IED having a virtual connection relation with the newly-added IED and is an indirectly-associated IED of the newly-added IED;

step 4, for the directly associated IED of the newly added IED, determining a test boundary according to the sub CRC codes SGRCri, SGTCRCi, SMRCi and SMTCRCi of the directly associated IED;

step 5, searching IEDs 1-IEDn with direct virtual connection relation between the overhaul IEDs, namely direct association IEDs, searching IEDs with virtual connection relation between the overhaul IEDs and the direct association IEDs, and performing indirect association IEDs on the overhaul IEDs;

and 6, for the directly associated IED for overhauling the IED, determining a test boundary according to the sub CRC codes SGRCi, SGTCRCi, SMRCi and SMTCRCi of the directly associated IED.

Moreover, the step 1 of calculating the GOOSE subscribed sub-CRC code per IED node lower process level access point G includes:

(1) SGRCrci is a CRC code generated by calculation of the ExtRef, intAddr and DataSet of the IEDi under the G access point INPUTS node, the cbName, the APPID, the MAC address and the like under the ConnectedAP.

(2) SGTCRCi is a CRC code generated by calculation of a data SET, a ldinst/prefix + inClass + Ininst/DOName/daName and a cbName, an APPID, a MAC address and the like under ConnectedAP according to a side-to-side subscription IEDi under a G access point FCDA node.

Moreover, the step 1 of calculating the SMV subscription sub CRC code at the M access points includes:

(1) SMRCrci is a CRC code generated by calculation of the ExtRef, intAddr and DataSet of the IEDi under the M access point INPUTS node, the cbName, the APPID, the MAC address and the like under the ConnectedAP.

(2) SMTCRCi is a CRC code generated by calculation of a DataSET, a ldinst/prefix + inClass + Ininst/DOName/daName and cbName, APPID, MAC address and the like under ConnectedAP according to a side-to-side subscription IEDi under an M access point FCDA node.

Moreover, the method for determining to add, delete and overhaul the IED in the step 2 includes:

analyzing the IEdName of the IED contained under the IED node in the two SCD files before and after reconstruction and expansion, reconstructing the IEdName which does not exist before the reconstruction and expansion, and reconstructing the IEdName which exists after the reconstruction and expansion as a new IED;

the IEdName before reconstruction and extension is deleted, and the IEdName not existing after reconstruction and extension is deleted as the IED;

for each IED, calculate

Changing the inconsistent IEDs before and after the expansion into overhaul IEDs;

further, the specific steps of step 4 include:

(1) comparing directly related IEDs of newly added IEDs before and after reconstruction, extension and overhaul

If the calculated values are consistent, the testing boundary is:

(newly-added IED/directly-associated IED) is belonged to virtual circuit (SGRCRC)_1～n∪SGTCRC_1～n∪SMRCRC_1～n∪SMTCRC_1～n)；

(2) If not, further comparing the SGRCRC to the directly associated IEDs one by one respectively_n+1～SGRCRC_m、SGTCRC_n+1～SGTCRC_m、SMRCRC_n+1～SMRCRC_m、SMTCRC_n+1～SMTCRC_m. If the h-th sub-CRC is not consistent, the test boundary is:

(newly-added IED/directly-associated IED) is belonged to virtual circuit (SGRCRC)_1～n∪SGTCRC_1～n∪SMRCRC_1～n∪SMTCRC_1～n) And:

(direct association IED/indirect association IED) is in the virtual circuit (SGRCRC)_h∪SGTCRC_h∪SMRCRC_h∪SMTCRC_h)。

Further, the specific steps of step 6 include:

(1) comparing SGRCi, SGTCRCi, SMRCi and SMTCRCi (i is 1 … n) of the overhaul IED before and after reconstruction and overhaul one by one; if the kth sub-CRC is inconsistent and directly associated with the IED

If the values of (1) are consistent, the test boundary is:

(service IED/direct association IED) is in the virtual circuit (SGRCRC)_k∪SGTCRC_k∪SMRCRC_k∪SMTCRC_k)。

(2) If directly associated with IED

And if the values are inconsistent, comparing the SGRCn + 1-SGRCN m, the SGTCRCn + 1-SGTCRC m, the SMRCn + 1-SMRCM and the SMTCRCn + 1-SMTCRCm of the directly associated IEDs one by one, and if the h-th sub CRC is inconsistent, testing the boundary:

And: (direct association IED/indirect association IED) is in the virtual circuit (SGRCRC)_h∪SGTCRC_h∪SMRCRC_h∪SMTCRC_h)。

The invention has the advantages and beneficial effects that:

according to the method, a GOOSE subscription sub CRC code and a release CRC code are calculated for each IED of SCD files before and after reconstruction, extension and overhaul according to a process layer access point G, and an SMV subscription sub CRC code and a release sub CRC code are calculated according to an M access point; dividing the IEDs into a newly added IED, a deleted IED and an overhaul IED; according to the virtual connection relation of IEDs, dividing the associated IEDs of the newly added or maintained IED into a direct associated IED and an indirect associated IED; according to the change of the sub CRC of the release and the subscription, the test boundaries of the IED which is directly associated and the IED which is indirectly associated are determined, the virtual loop is described by adopting the minimum sub CRC of the release and the subscription, the test range is limited to be minimum in the overhaul and the reconstruction, the influence range is limited to be minimum, the test time is shortened, the overhaul difficulty is reduced, and the overhaul accuracy is improved.

Drawings

FIG. 1 is a diagram illustrating a virtual loop and sub CRC of a newly added IED according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an IED virtual circuit and sub-CRC for overhaul in an embodiment of the present invention.

Detailed Description

The embodiments of the invention will be described in further detail below with reference to the accompanying drawings:

the step 1 of calculating the GOOSE subscribed sub-CRC code by the process level access point G under each IED node includes:

The step 1 of calculating the SMV subscribed sub CRC code at the M access points includes:

the method for determining the addition, deletion and overhaul of the IED in the step 2 comprises the following steps:

for each IED, calculate

and changing the configuration file of the overhaul IED virtual circuit and downloading the overhaul IED virtual circuit again.

the specific steps of the step 4 comprise:

If the calculated values are consistent, the testing boundary is:

Step 5, searching the overhaul IEDs 1-IEDn (not including the overhaul IEDs associated with the newly-added IEDs) for IEDs having direct virtual connection relations with the overhaul IEDs, wherein the IEDs are directly associated, searching the directly associated IEDs for IEDs having virtual connection relations with the directly associated IEDs, and using the IEDs as indirect associated IEDs for the overhaul IEDs;

The specific steps of the step 6 comprise:

If the values of (1) are consistent, the test boundary is:

(2) If directly associated with IED

The present invention is further explained below by taking the schematic diagrams of the newly added IED virtual circuit and sub-CRC and the schematic diagrams of the overhaul IED virtual circuit and sub-CRC shown in fig. 1 and 2 as examples:

and importing and analyzing the SCD file before reconstruction, expansion and maintenance and the SCD file after reconstruction, calculating GOOSE subscribed sub CRC codes SGRCi and issued sub CRC codes SGTCRCi according to the access point G of the process layer under each IED node, and calculating SMV subscribed sub CRC codes SMRCi and issued sub CRC codes SMTCRCi under the access point M.

Wherein SGRCrci is an IEDi sub CRC code generated by calculating the ExtRef, intAddr and DataSet of the IEDi under the G access point INPUTS node, the cbName, the APPID, the MAC address and the like under the ConnectedAP.

And the SGTCRCi is a sub-CRC code related to the IEDi, which is generated by calculation of a data SET, a ldinst/prefix + inClass + Ininst/do name/daName, a cbName, an APPID, a MAC address and the like under a ConnectedAP according to the opposite side subscription IEDi under the G access point FCDA node.

Wherein SMRCri is a sub CRC code related to IEDi, which is generated by calculating the ExtRef, intAddr and DataSet of IEDi under the M access point INPUTS node, the cbName, the APPID, the MAC address and the like under the ConnectedAP.

And the SGTCRCi is a sub-CRC code related to the IEDi, which is generated by calculating the data SET, the ldinst/prefix + inClass + Ininst/DOName/daName, the cbName, the APPID, the MAC address and the like under the ConnectedAP according to the opposite side subscription IEDi under the M access point FCDA node. Other calculation rules of CRC generally follow the regulation of section 8.2 in Q/GDW 11471-2015 technical Specification of the relay protection engineering file of the intelligent substation.

Analyzing the IEdName of the IED under the IED node in the SCD file to form an IED list, comparing the IED list before and after reconstruction and maintenance, and determining to add the IED, delete the IED and maintain the IED.

Wherein, the IEdName which is not existed before reconstruction and extension and the IEdName which is existed after reconstruction and extension are new IEDs; the IEdName before reconstruction and extension is deleted, and the IEdName not existing after reconstruction and extension is deleted as the IED;

for each IED, calculate

And changing the inconsistent IEDs before and after the expansion into overhaul IEDs. Inconsistency indicates that the maintenance virtual circuit is changed, and the virtual circuit configuration file needs to be downloaded again.

As shown in fig. 1, newly added IEDs 1-n are reconstructed and maintained, and the newly added IEDs may be a group of IEDs such as a protection unit, a merging unit, an intelligent terminal, a measurement and control device, etc. which are simultaneously associated with one IED, for example, a 220kV newly added line interval, a newly added line protection unit, a merging unit, an intelligent terminal, a line measurement and control device, and a bus protection.

For the newly added IEDs 1-IEDn, searching each newly added IED for a direct virtual connection relation with the newly added IED, setting the IED with the newly added IED excluded as a direct associated IED, searching the IED with the direct associated IED for the IED with the virtual connection relation with the newly added IED, and setting the searched IED as an indirect associated IED of the newly added IED.

As shown in fig. 1, the directly associated IEDs are associated with the newly added IEDs, and also associated with the original operating IEDn +1 to IEDm, each IED assumes four associations of GOOSE release and subscription and SMV release, and for the directly associated IEDs of the newly added IEDs, the test boundary is determined according to the variation of the sub-CRC codes sgrcri, SGTCRCi, smrrci, and SMTCRCi of the directly associated IEDs. The specific method comprises the following steps:

comparing directly related IEDs of newly added IEDs before and after reconstruction, extension and overhaul

If the calculated values are consistent, the testing boundary is:

(newly-added IED/directly-associated IED) is belonged to virtual circuit (SGRCRC)_1～n∩SGTCRC_1～n∩SMRCRC_1～n∩SMTCRC_1～n)。

Wherein: the new IED/the direct correlation IED represents a virtual loop between the new IED and the direct correlation IED, and the virtual loop to be tested is determined by the content contained in the epsilon; e.g. virtual loop (SGRCRC)_1～n∩SGTCRC_1～n∩SMRCRC_1～n∩SMTCRC_1～n) Indicating that the virtual loop defined by the subcrc code in brackets needs to be tested, and the symbol "∩" indicating that all GOOSE, SMV subscribed, published virtual loops from 1 to n must be tested.

If not, further comparing the sub CRC codes SGRCC of the indirect IEDs one by one for the directly associated IEDs respectively_n+1～SGRCRC_m、SGTCRC_n+1～SGTCRC_m、SMRCRC_n+1～SMRCRC_m、SMTCRC_n+1～SMTCRC_m. If the h-th sub-CRC is not consistent, the test boundary is:

(newly-added IED/directly-associated IED) is belonged to virtual circuit (SGRCRC)_1～n∩SGTCRC_1～n∩SMRCRC_1～n∩SMTCRC_1～n) And:

Wherein ∈ virtual loop (SGRCRC)_h∪SGTCRC_h∪SMRCRC_h∪SMTCRC_h) Indicating a virtual loop between a directly associated IED and an indirectly associated IED, determined by a sub-CRC code followed by parenthesis symbol "∪" indicates a loop defined by an inconsistent SGRCRC_hOr SGTCRC_hOr SMRCRC_hOr SMTCRC_hThe determined virtual loop must be tested.

Fig. 2 is a schematic diagram of a service IED virtual loop and sub-CRC. As shown in fig. 2, for the overhaul IED (not including the overhaul IED associated with the newly added IED), searching the overhaul IED having a direct virtual connection relationship therewith as a direct association IED, searching the direct association IED for the IED having a virtual connection relationship therewith as an indirect association IED for the overhaul IED;

for the directly associated IEDs overhauling the IEDk, determining a test boundary according to the sub CRC codes SGRCi, SGTCRCi, SMRCi and SMTCRCi of the directly associated IEDs; the specific method comprises the following steps:

comparing the SGRCRCn, the SGTCRCn, the SMRCn and the SMTCRCn of the IED and the overhaul IED before and after rebuilding and expansion and overhaul one by one; if the sub-CRCs are not consistent and directly associated with the IED

If the values of (1) are consistent, the test boundary is:

(service IED/direct association IED) is in the virtual circuit (SGRCRC)_n∪SGTCRC_n∪SMRCRC_n∪SMTCRC_n)。

If directly associated with IED

And if the values are inconsistent, comparing the SGRCn + 1-SGRCm, SGTCRCn + 1-SGTCRC m, SMRCn + 1-SMRCm and SMTCRCn + 1-SMTCRCm one by one for the directly associated IEDs, and if the h-th sub-CRC is inconsistent, testing the boundary:

And (directly associated IED/indirectly associated IED) is in a virtual circuit (SGRCRC)_h∪SGTCRC_h∪SMRCRC_h∪SMTCRC_h)。

And finally, developing corresponding software according to the step 4 and the step 6, and outputting a reconstruction, extension and overhaul test boundary report:

the method comprises basic reconstruction, extension and maintenance information, sub-CRC information reconstruction, extension and maintenance information, and sub-CRC detailed information reconstruction, extension and maintenance information.

The rebuilding, expanding and overhauling basic information comprises new IED names and descriptions, IED names and descriptions and overhauling IED names and descriptions;

the reconstruction/expansion sub CRC information comprises newly added or repaired IEDs, directly associated IEDs, and change conditions and test boundaries of sub CRC of the directly associated IEDs;

the rebuild/overhaul sub-CRC detailed information comprises values and changes of each SGRCi, SGTCRCi, SMRCi and SMTCRCi before and after the rebuild or overhaul of the directly associated IED.

It should be emphasized that the examples described herein are illustrative and not restrictive, and thus the present invention includes, but is not limited to, those examples described in this detailed description, as well as other embodiments that can be derived from the teachings of the present invention by those skilled in the art and that are within the scope of the present invention.

Claims

1. A transformer substation reconstruction and expansion overhaul test boundary determining method based on a minimum sub CRC code is characterized by comprising the following steps: the method comprises the following steps:

2. The substation reconstruction, extension and overhaul test boundary determination method based on the minimum sub CRC code according to claim 1, characterized in that: the step 1 of calculating the GOOSE subscribed sub-CRC code by the process level access point G under each IED node includes:

3. The substation reconstruction, extension and overhaul test boundary determination method based on the minimum sub CRC code according to claim 1, characterized in that: the step 1 of calculating the SMV subscribed sub CRC code at the M access points includes:

4. The substation reconstruction, extension and overhaul test boundary determination method based on the minimum sub CRC code according to claim 1, characterized in that: the method for determining the addition, deletion and overhaul of the IED in the step 2 comprises the following steps:

for each IED, calculate

And changing the inconsistent IEDs before and after the expansion into overhaul IEDs.

5. The substation reconstruction, extension and overhaul test boundary determination method based on the minimum sub CRC code according to claim 1, characterized in that: the specific steps of the step 4 comprise:

If the calculated values are consistent, the testing boundary is:

6. The substation reconstruction, extension and overhaul test boundary determination method based on the minimum sub CRC code according to claim 1, characterized in that: the specific steps of the step 6 comprise:

If the values of (1) are consistent, the test boundary is:

(2) If directly associated with IED

Comparing SGRCRCRCn + 1-SGRCm, SGTCRCn + 1-SGTCR one by one for directly associated IEDs respectively when the values are inconsistentCm, SMRCRCn + 1-SMRCm, SMTCRCn + 1-SMTCRCm, if the h-th sub-CRC is not consistent, the test boundary is:

(service IED/direct association IED) is in the virtual circuit (SGRCRC)_k∪SGTCRC_k∪SMRCRC_k∪SMTCRC_k)；