CN109270379B - In-situ relay protection embedded test method capable of switching protection function - Google Patents
In-situ relay protection embedded test method capable of switching protection function Download PDFInfo
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- CN109270379B CN109270379B CN201811182610.2A CN201811182610A CN109270379B CN 109270379 B CN109270379 B CN 109270379B CN 201811182610 A CN201811182610 A CN 201811182610A CN 109270379 B CN109270379 B CN 109270379B
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Abstract
The disclosure relates to a local relay protection embedded test method capable of switching protection functions. The method comprises the following steps: constructing a local protection model of the transformer substation according to the structure of the power distribution network; importing the SCD file of the transformer substation into the model for processing, and determining operation configuration files and prediction results of a plurality of on-site relay protection devices of the transformer substation; downloading the in-place protection model and the operation configuration file into an in-place relay protection testing device to generate a plurality of simulation in-place relay protection devices; performing function test on the target simulation in-situ relay protection device to obtain a test result; and generating a test report of the on-site relay protection device according to the test result and the prediction result. The embodiment of the disclosure can not be limited by a field and a test environment, can quickly test and verify the faults of the device and the system in real time, improves the response speed, the data precision and the adaptive strength of the device, and can ensure the safe, stable and reliable operation of a power distribution network.
Description
Technical Field
The disclosure relates to the technical field of power engineering, in particular to a local relay protection embedded test method capable of switching protection functions.
Background
With the development of computer and communication technology, various types of digital in-place relay protection devices are developed, the safe and stable operation level of a power system is greatly improved, and the development modes of hardware and software are independently designed for each type of protection by the functions, algorithms and communication modes of the protection devices, so that the efficiency is low, the maintenance is difficult, and the development of new situations is not suitable. Under the condition, a development mode based on a general platform technology is applied, so that the development efficiency is improved, and the development period of a new product is shortened. Practice proves that the development mode based on the general platform technology can adapt to the requirement of technology development. The application of platform technology lays a solid technical foundation for simulating various types of relay protection devices, at present, most of common power system simulation tools are offline and non-real-time, such as EMTDC, EMTP, EToMAC and the like, and the common power system simulation tools are widely applied to planning and design early stage of a power grid, system test, fault after-inversion and teaching scientific research. In the related technology, research on an on-line real-time digital simulation technology is always carried out, and various requirements such as convenience, high efficiency, complexity, flexibility, instantaneity and the like are provided for a simulation experiment of an in-place relay protection device, so that an integrated embedded in-place protection device is developed according to the requirements, the occupied area of an experiment test environment can be reduced, the investment cost is reduced, the test efficiency is improved, and the safe, stable and reliable operation of a power grid and a power system is further ensured.
Disclosure of Invention
In view of the above, the present disclosure provides a local relay protection embedded test method capable of switching protection functions.
According to one aspect of the disclosure, a local relay protection embedded test method capable of switching protection functions is provided.
In one possible implementation, a site-based protection model of the substation is constructed according to the structure of the power distribution network;
importing a total station system configuration SCD file of a transformer substation into the on-site protection model for processing, and determining operation configuration files and predicted operation results of a plurality of on-site relay protection devices of the transformer substation, wherein the operation configuration files comprise configuration information, test cases and fixed value lists of the on-site relay protection devices;
downloading the in-place protection model and the operation configuration file into an in-place relay protection testing device, and generating a plurality of simulation in-place relay protection devices respectively corresponding to the in-place relay protection devices in the in-place relay protection testing device;
performing a function test on a target simulation on-site relay protection device to obtain a test operation result of the target simulation on-site relay protection device, wherein the target simulation on-site relay protection device is any one of the plurality of simulation on-site relay protection devices;
and generating a test report of the on-site relay protection device corresponding to the target simulation on-site relay protection device according to the test operation result and the prediction operation result of the target simulation on-site relay protection device.
In one possible implementation mode, the operation attribute of each simulation on-site relay protection device is the same as that of each corresponding on-site relay protection device,
the operation attributes at least comprise sampling value SV precision, virtual terminal correctness, protection action fixed value and tripping and closing action time.
In one possible implementation, the method further includes:
respectively detecting whether the operation of each simulation on-site relay protection device is normal;
and when each simulation on-site relay protection device operates normally, switching to an on-site relay protection function test.
In one possible implementation, the method further includes:
and under the condition that the test operation result of the target simulation on-site relay protection device is the same as the prediction operation result, determining that the target simulation on-site relay protection device is normal.
In a possible implementation manner, performing a function test on a target simulation in-place relay protection device to obtain a test operation result of the target simulation in-place relay protection device includes:
and according to the test case and the fixed value list of the target simulation in-place relay protection device, carrying out sampling value SV test on the target simulation in-place relay protection device to obtain an SV test operation result of the target simulation in-place relay protection device.
In a possible implementation manner, performing a function test on a target simulation in-place relay protection device to obtain a test operation result of the target simulation in-place relay protection device includes:
and carrying out a general object-oriented substation event GOOSE open-in and open-out test on the target simulation on-site relay protection device according to the test case and the fixed value list of the target simulation on-site relay protection device to obtain a GOOSE open-in and open-out test operation result of the target simulation on-site relay protection device.
In a possible implementation manner, performing a function test on a target simulation in-place relay protection device to obtain a test operation result of the target simulation in-place relay protection device includes:
and performing a fixed value function test on the target simulation in-place relay protection device according to the test case and the fixed value list of the target simulation in-place relay protection device to obtain a fixed value test operation result of the target simulation in-place relay protection device, wherein the fixed value test operation result comprises related protection action behaviors.
In a possible implementation manner, performing a function test on a target simulation in-place relay protection device to obtain a test operation result of the target simulation in-place relay protection device includes:
according to the test case and the fixed value list of the target simulation in-place relay protection device, performing soft pressing plate remote control, fixed value calling and wave recording calling function tests on the target simulation in-place relay protection device to obtain a test operation result of the target simulation in-place relay protection device, wherein the test operation result at least comprises related protection action behaviors.
According to a second aspect of the disclosure, a local relay protection embedded test system with switchable protection functions is provided.
In one possible implementation, the system includes: a simulation modeling platform and a local relay protection testing device,
the simulation modeling platform is configured to:
constructing a local protection model of the transformer substation according to the structure of the power distribution network;
importing a total station system configuration SCD file of a transformer substation into the on-site protection model for processing, and determining operation configuration files and predicted operation results of a plurality of on-site relay protection devices of the transformer substation, wherein the operation configuration files comprise configuration information, test cases and fixed value lists of the on-site relay protection devices;
downloading the in-place protection model and the operation configuration file to an in-place relay protection testing device;
the in-place relay protection testing device is connected to the simulation modeling platform and is configured to:
generating a plurality of simulation on-site relay protection devices respectively corresponding to the on-site relay protection devices according to the downloaded on-site protection model and the running configuration file;
performing a function test on a target simulation on-site relay protection device to obtain a test operation result of the target simulation on-site relay protection device, wherein the target simulation on-site relay protection device is any one of the plurality of simulation on-site relay protection devices;
and generating a test report of the on-site relay protection device corresponding to the target simulation on-site relay protection device according to the test operation result and the prediction operation result of the target simulation on-site relay protection device.
According to a third aspect of the present disclosure, a method of in-place protection device replacement testing is provided.
In one possible implementation, the method includes: and connecting the in-place relay protection device to the in-place relay protection embedded test system with the switchable protection function, so that the in-place relay protection embedded test system with the switchable protection function tests the in-place relay protection device.
According to the embodiment of the disclosure, an on-site protection model of a transformer substation is constructed according to a power distribution network structure; the method comprises the steps that a total station system configuration SCD file of a transformer substation is imported into a local protection model for processing, operation configuration files and a prediction operation result of a plurality of local relay protection devices of the transformer substation are determined, wherein the operation configuration files comprise configuration information, test cases and a fixed value list of each local relay protection device; downloading the in-place protection model and the operation configuration file into an in-place relay protection testing device, and generating a plurality of simulation in-place relay protection devices respectively corresponding to the in-place relay protection devices in the in-place relay protection testing device; performing function test on the target simulation on-site relay protection device to obtain a test operation result of the target simulation on-site relay protection device, wherein the target simulation on-site relay protection device is any one of a plurality of simulation on-site relay protection devices; and generating a test report of the in-place relay protection device corresponding to the target simulation in-place relay protection device according to the test operation result and the prediction operation result of the target simulation in-place relay protection device. The embodiment of the disclosure can be free from the limitation of a field and a test environment, can quickly test and verify the faults of the device and the system in real time, improves the response speed, the data precision and the adaptive strength of the device, and ensures the safe, stable and reliable operation of the power distribution network.
Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.
Fig. 1 shows a flow diagram of a local relay protection embedded test method of switchable protection functions according to an embodiment of the present disclosure;
FIG. 2 illustrates a flow diagram of a method for in-place relay protection embedded test testing with switchable protection functions according to an embodiment of the present disclosure;
FIG. 3 illustrates a flow diagram of a method for in-place relay protection embedded test testing with switchable protection functions according to an embodiment of the present disclosure;
4a, 4b, 4c, 4d show schematic diagrams of an in-situ relay protection testing device according to an embodiment of the present disclosure;
fig. 5 shows a schematic diagram of a switched protection function in-place relay protection embedded test system according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.
Fig. 1 shows a flowchart of a local relay protection embedded test method with switchable protection function according to an embodiment of the present disclosure, and the method includes steps S11 to S15.
In step S11, constructing an on-site protection model of the substation according to the distribution network structure;
in step S12, importing a total station system configuration SCD file of the substation into a localized protection model for processing, and determining operation configuration files and a predicted operation result of a plurality of localized relay protection devices of the substation, where the operation configuration files include configuration information, test cases, and a fixed value list of each of the localized relay protection devices;
in step S13, downloading the localization protection model and the operation configuration file to a localization relay protection testing device, and generating a plurality of simulation localization relay protection devices respectively corresponding to the plurality of localization relay protection devices in the localization relay protection testing device;
in step S14, performing a function test on the target simulation in-place relay protection device to obtain a test operation result of the target simulation in-place relay protection device, where the target simulation in-place relay protection device is any one of the plurality of simulation in-place relay protection devices;
in step S15, a test report of the on-site relay protection device corresponding to the target simulation on-site relay protection device is generated based on the test operation result and the predicted operation result of the target simulation on-site relay protection device.
In this embodiment, the in-place relay protection device is a new generation protection device which can be in-place, miniaturized and plug-and-play, and is classified into an intelligent type and a conventional type protection device, and the device has no display liquid crystal. Can be applicable to line protection, transformer protection, bus protection, the device can be applicable to high and severe cold, high altitude, high temperature, high humidity, strong sunshine, salt fog etc. and have representatively place, to various extreme environmental conditions, has formulated the test item that is strictest: testing items such as extreme high temperature (+85 degrees), low temperature (ring temperature-40 degrees), immersion (1 m underwater for 30 minutes), salt spray erosion, strong electromagnetic interference, mechanical performance (drop height of 1m, free fall) and the like. A total station system configuration file (SCD) is derived from IEC61850 standard, and describes each isolated Intelligent Electronic Device (IED) in a digital substation and the logical relationship between the IEDs, and also completely describes how each isolated IED is integrated into a fully functional substation automation system.
According to the embodiment of the disclosure, an on-site protection model of a transformer substation is constructed according to a power distribution network structure; the method comprises the steps that a total station system configuration SCD file of a transformer substation is imported into a local protection model for processing, operation configuration files and a prediction operation result of a plurality of local relay protection devices of the transformer substation are determined, wherein the operation configuration files comprise configuration information, test cases and a fixed value list of each local relay protection device; downloading the in-place protection model and the operation configuration file into an in-place relay protection testing device, and generating a plurality of simulation in-place relay protection devices respectively corresponding to the in-place relay protection devices in the in-place relay protection testing device; performing function test on the target simulation on-site relay protection device to obtain a test operation result of the target simulation on-site relay protection device, wherein the target simulation on-site relay protection device is any one of a plurality of simulation on-site relay protection devices; and generating a test report of the in-place relay protection device corresponding to the target simulation in-place relay protection device according to the test operation result and the prediction operation result of the target simulation in-place relay protection device. The embodiment of the disclosure can be free from the limitation of a field and a test environment, can quickly test and verify the faults of the device and the system in real time, improves the response speed, the data precision and the adaptive strength of the device, and ensures the safe, stable and reliable operation of the power distribution network.
In one possible implementation, step S11 includes: and constructing a local protection model of the transformer substation according to the power distribution network structure.
In the implementation mode, the in-place protection model is a research on an intelligent substation simulation technology in a real-time operation state, can research the importing and capturing mechanism of the SCD file information of the intelligent substation, establish various real-time operation modes of the intelligent substation, simulate the operation conditions of the intelligent substation in different operation modes, and capture data messages including SV, GOOSE, MMS and other message data in a simulation mode in real time by using a special tool for the SCD file, wherein the captured data messages can be in an original message format, so that the unification of the primary operation state, the secondary equipment monitoring data, the monitoring pictures and the operation of a power grid is realized.
For example, the on-site relay protection model may analyze the configured SCD-MATCH file to obtain a correspondence between the algorithm model and the IED; the algorithm model can be copied from the standard model engineering, the model to be built is selected from the automatic modeling dialog box, and the algorithm model completes automatic replacement and arrangement of variables; the configuration file of the algorithm model to be built can be analyzed, the corresponding relation between the points in the database and the IED is obtained, the automatic point aligning process is completed, and the automatic point aligning process is stored in the corresponding database point table.
According to the power distribution network main line structure fixed value power grid primary and secondary equipment simulation model building range, the principle logic algorithm modeling of different types of in-situ relay protection devices is carried out at intervals in an electromagnetic transient mode, and a high-precision in-situ protection model in the protection equipment is generated. Other development algorithms can also be adopted to perform principle logic algorithm modeling on the transformer substation on-site protection device, and the disclosure does not limit the modeling.
The electromagnetic transient mode is simulation software based on electromagnetic transient, a parallel computing technology based on an FPGA computing board is adopted, a multi-operation component of high-speed instruction flow and a power grid any point fault online real-time simulation algorithm are integrated, and long-term continuous stable operation capacity, high real-time performance and strong interactivity of the electromagnetic transient simulation software are achieved. The method can establish primary equipment such as an alternating-current voltage source, a multi-phase subsection parameter transformer, a switch, a disconnecting link, a mutual inductor, a capacitor, a reactor, a wave trap, GIS equipment, a bus, a lightning arrester, a coupling capacitor, a used transformer and the like and an operation control mechanism thereof, can establish a classical fault model of the equipment such as the transformer, the bus, a line and the like, and can also carry out single equipment fault and hanging interval random combination equipment fault so as to establish a fault model with higher complexity.
A protection device system model can be constructed in a graphical mode, an algorithm is separated from a special algorithm library to a modeling area, a module can be generated, input and output of each module are connected through connecting wires, a new model is constructed, and the connecting wires can be added or subtracted at will. The initial value of input and output quantity of each module, the running speed, the running freeze and the like can be modified, and the description of the input and output quantity of each module can be redefined. When several modules construct a model with general functions, the model can be packaged and redefined into a combination algorithm, so that other more responsible models can be constructed by the combination algorithm, the process can be carried out in an infinite stage, and a complex multi-level combination algorithm is constructed. Other methods of constructing the algorithm may also be used, as the present disclosure is not limited in this respect.
In one possible implementation, step S12 includes: the method comprises the steps of importing a SCD file configured by a total station system of a transformer substation into a local protection model for processing, and determining operation configuration files and predicted operation results of a plurality of local relay protection devices of the transformer substation, wherein the operation configuration files comprise configuration information, test cases and fixed value lists of the local relay protection devices.
In the implementation manner, the SCD file of the existing Substation is imported into the in-place protection model, and is used for simulating GOOSE (Generic Object-Oriented Substation Event) and SV (Sampled Value) tests of the Substation-related ied (intelligent Electronic device) device, and importing the parameters of the device into the in-place protection model. By editing the algorithm model to perform configuration files, devices of the same type can be individually configured or unified in the same configuration file according to different manufacturers or different models, which is not limited by the disclosure.
In one possible implementation, step S13 includes: and downloading the on-site relay protection model and the operation configuration file into an on-site relay protection testing device, and generating a plurality of simulation on-site relay protection devices respectively corresponding to the on-site relay protection devices in the on-site relay protection testing device. The operation attributes of each simulation on-site relay protection device are the same as those of each corresponding on-site relay protection device, and the operation attributes at least comprise sampling value SV precision, virtual terminal correctness, protection action fixed value and tripping and closing action time.
Fig. 4a, 4b, 4c, and 4d are schematic diagrams illustrating an in-place relay protection testing device according to an embodiment of the disclosure.
Fig. 4a is a front view of the in-place relay protection testing device, in which there is a device power supply 1, function keys A, B, C are configured, and a network interface is configured to connect an external testing device to debug each in-place relay protection device. FIG. 4b is a rear view of the in-place relay protection testing device, and FIG. 4c is a side view of the in-place relay protection testing device. Fig. 4d is a top view of the in-place relay protection testing device, the in-place relay protection testing device is externally connected by using 4 groups of aviation plugs, and 2, 3, 4, and 5 in fig. 4d are an input interface, an output interface, a communication interface, and an ac interface of a power supply, respectively. The aviation plug socket is mainly used for connecting a power supply or a signal, particularly for wiring harnesses with more cores, is safe and reliable, and enables the secondary equipment and the primary equipment to be connected and operated more conveniently and more attractive. The aerial plug comprises a standardized cable aerial plug interface and a standardized optical cable aerial interface. It should be noted that the dimensional parameters in fig. 4a, 4b, 4c, and 4d are provided as examples to describe the in-situ relay protection testing device, but those skilled in the art can understand that the examples do not constitute a limitation to the in-situ relay protection testing device of the present disclosure.
In the implementation mode, the in-place protection model and the operation configuration file are downloaded into the in-place relay protection testing device, a plurality of simulation in-place relay protection devices respectively corresponding to the plurality of in-place relay protection devices are generated, the plurality of simulation in-place relay protection devices are respectively consistent with the plurality of corresponding in-place relay protection devices, and the simulation in-place relay protection devices can realize the functions of adoption testing, input and output testing, fixed value function verification, soft pressing plate remote control, fixed value calling, wave recording calling and the like of the in-place relay protection devices.
In one possible implementation, step S14 includes: and performing function test on the target simulation in-place relay protection device to obtain a test operation result of the target simulation in-place relay protection device, wherein the target simulation in-place relay protection device is any one of the plurality of simulation in-place relay protection devices.
In the implementation mode, the function test is carried out on the target simulation in-place relay protection device, and the function test comprises the functions of function output, parameter sampling, input and output test, fixed value function verification, soft pressing plate remote control, fixed value calling, wave recording calling, protection tripping action time test and the like of the in-place protection device, so that the test operation result of the target simulation in-place relay protection device is obtained.
In one possible implementation, step S14 includes: and carrying out SV test on the sampling value of the target simulation on-site relay protection device according to the test case and the fixed value list of the target simulation on-site relay protection device to obtain the SV test operation result of the target simulation on-site relay protection device.
In the implementation mode, the target simulation in-place relay protection device can be subjected to SV sampling test according to a built complete test case and a fixed value list of the electromagnetic transient-based in-place protection relay device model, and an SV test operation result of the target simulation in-place relay protection device is obtained. And comparing the SV test operation result with the predicted operation result, switching the function test if the test result is normal, and repeating the test if the test part of the cases returns failure information.
In one possible implementation, step S14 includes: the general object-oriented substation event GOOSE open-in and open-out test can be performed on the target simulation on-site relay protection device according to the test case and the fixed value list of the target simulation on-site relay protection device, and the GOOSE open-in and open-out test operation result of the target simulation on-site relay protection device is obtained.
In the implementation mode, the GOOSE open-in and open-out module test can be carried out on the target simulation in-place relay protection device according to the built complete test case and the fixed value list of the model of the in-place relay protection device based on the electromagnetic transient, and the GOOSE open-in and open-out test operation result of the target simulation in-place relay protection device is obtained. And comparing the GOOSE input/output test operation result with the prediction operation result, switching the functional test if the test result is normal, and repeating the test if the test part of the cases returns failure information.
In one possible implementation, step S14 includes: and performing a fixed value function test on the target simulation in-place relay protection device according to the test case and the fixed value list of the target simulation in-place relay protection device to obtain a fixed value test operation result of the target simulation in-place relay protection device, wherein the fixed value test operation result comprises related protection action behaviors.
In the implementation mode, according to the test case of the target simulation in-place relay protection device and the downloaded constant value list, the in-place relay protection model automatically tests the constant value function module of the target simulation in-place relay protection device to obtain a constant value test operation result of the target simulation in-place relay protection device, wherein the constant value test operation result comprises related protection action behaviors and the like. And comparing the fixed value test operation result with the predicted operation result, switching the test function if the test results are all consistent, and otherwise, repeatedly testing.
In one possible implementation, step S14 includes: according to the test case and the fixed value list of the target simulation in-place relay protection device, performing soft pressing plate remote control, fixed value calling and wave recording calling function tests on the target simulation in-place relay protection device to obtain a test operation result of the target simulation in-place relay protection device, wherein the test operation result at least comprises related protection action behaviors.
In the implementation mode, according to a test case with a target simulation in-place relay protection device loaded in advance and a loaded fixed value list, the in-place protection module of the in-place relay protection model automatically tests the functional modules of soft pressing plate remote control, fixed value calling and wave recording calling on the target in-place relay protection device, and test operation results of the target simulation in-place relay protection device are obtained and comprise related protection action behaviors and the like. And comparing the test operation result (related protection action behavior) of the related protection action with the prediction operation result (preset action expectation), switching the test function if the test results are consistent, and otherwise, retesting.
In one possible implementation, step S15 includes: and generating a test report of the in-place relay protection device corresponding to the target simulation in-place relay protection device according to the test operation result and the prediction operation result of the target simulation in-place relay protection device.
In the implementation mode, the test report of the tested device is generated in a gathering mode according to the test result, and the condition of completely simulating the all-type in-place protection device of the total station is provided after the test abnormal condition is confirmed.
Fig. 2 shows a flow chart of a local relay protection embedded test method of switchable protection functions according to an embodiment of the present disclosure.
In a possible implementation manner, the in-place relay protection embedded test method with switchable protection function further includes steps S16 and S17.
In step S16, whether the operation of each simulation on-site relay protection device is normal is detected;
in step S17, when each simulation on-site relay protection device operates normally, the simulation on-site relay protection device switches to the on-site relay protection function test.
In the implementation mode, before the function test of the target simulation in-place relay protection device, whether each simulation in-place relay protection device operates normally can be detected, and if a single simulation in-place relay protection device is abnormal or has data error, whether a related configuration file is normal needs to be checked repeatedly; if all the in-situ protection devices operate normally, abnormal warning signals or data are not reported in error, the liquid crystal protection function can be switched to the in-situ relay protection function test according to the test requirements, and therefore the function test of the target simulation in-situ relay protection device can be started.
FIG. 3 shows a flow chart of a local relay protection embedded test method capable of switching protection functions according to an embodiment of the disclosure
In a possible implementation manner, the in-place relay protection embedded test method with switchable protection function further includes step S18.
In step S18, when the test operation result of the target simulation on-site relay protection device is the same as the predicted operation result, it is determined that the target simulation on-site relay protection device is normal.
In the implementation mode, the function test is carried out on the target simulation in-place relay protection device, the function test comprises the functions of function output, parameter sampling, input and output test, fixed value function verification, soft pressing plate remote control, fixed value calling, wave recording calling, protection tripping action time test and the like of the in-place relay protection device, the test operation result of the target simulation in-place relay protection device is obtained, and if the function test operation result of the target simulation in-place relay protection device is the same as the prediction operation result, the target simulation in-place relay protection device is normal.
The in-situ relay protection embedded test system with switchable protection function is explained below.
Fig. 5 shows a schematic diagram of a switched protection function in-place relay protection embedded test system according to an embodiment of the present disclosure.
As shown in fig. 5, in one possible implementation manner, the in-place relay protection embedded test system with switchable protection function includes a simulation modeling platform 51 and an in-place relay protection testing device 52,
the simulation modeling platform 51 is configured to perform the following steps S511-S513:
in step S511, a site-based protection model of the substation is constructed according to the distribution network structure;
in step S512, importing a total station system configuration SCD file of the substation into a localized protection model for processing, and determining operation configuration files and a predicted operation result of a plurality of localized relay protection devices of the substation, where the operation configuration files include configuration information, test cases, and a fixed value list of each of the localized relay protection devices;
in step S153, downloading the localization protection model and the operation configuration file to the localization relay protection testing device;
the in-situ relay protection testing device 52 is connected to the simulation modeling platform 51 and configured to execute the following steps S521-S523:
in step S521, a plurality of simulation on-site relay protection devices respectively corresponding to the plurality of on-site relay protection devices are generated according to the downloaded on-site relay protection model and the operation configuration file;
in step S522, performing a function test on the target simulation in-place relay protection device to obtain a test operation result of the target simulation in-place relay protection device, where the target simulation in-place relay protection device is any one of the plurality of simulation in-place relay protection devices;
in step S523, a test report of the in-place relay protection device corresponding to the target simulation in-place relay protection device is generated according to the test operation result and the predicted operation result of the target simulation in-place relay protection device.
In the implementation mode, according to the set value power grid primary and secondary equipment simulation model building range of the power distribution network main line structure, the principle logic algorithm modeling of different types of in-situ relay protection devices is carried out at intervals in an electromagnetic transient mode to generate a high-precision in-situ relay protection model in the protection device, and the principle logic algorithm modeling of the transformer substation in-situ relay protection devices can be carried out by adopting other development algorithms, which is not limited by the disclosure.
The method comprises the steps of importing an SCD file of an existing transformer substation into a local relay protection model, simulating a GOOSE input-output test and an SV sampling value test of related IED devices of the transformer substation, importing device parameters into the local relay protection model, and determining an operation configuration file and a predicted operation result of the local relay protection device.
The in-place protection model and the operation configuration file are downloaded into the in-place relay protection testing device, a plurality of simulation in-place relay protection devices corresponding to the plurality of in-place relay protection devices are generated, the plurality of simulation in-place relay protection devices are consistent with the plurality of corresponding in-place relay protection devices, and the simulation in-place relay protection devices can realize the functions of adoption testing, input and output testing, fixed value function verification, soft pressing plate remote control, fixed value calling, wave recording calling and the like of the in-place relay protection devices.
And performing function test on the target simulation in-place relay protection device, wherein the function test comprises the functions of function output, parameter sampling, input and output test, constant value function verification, soft pressing plate remote control, constant value calling, wave recording calling, protection tripping action time test and the like of the in-place protection device, and the test operation result of the target simulation in-place relay protection device is obtained.
And summarizing and generating a test report of the tested device according to the test result, and completely simulating the conditions of the total-station full-type in-place relay protection device after confirming that no test abnormal condition exists.
In a possible implementation manner, the in-place relay protection device replacement type testing method comprises the step of connecting the in-place relay protection device to the in-place relay protection embedded type test system with the switchable protection function, so that the in-place relay protection embedded type test system with the switchable protection function tests the in-place relay protection device.
In this implementation, the in-place protection device may be connected to a test system of the in-place protection device, so that the in-place relay protection embedded test system capable of switching the protection function tests the in-place relay protection device. For example, when a user needs to replace the on-site protection device on site, the on-site protection device can be directly connected to the on-site relay protection embedded test system with switchable protection function, and the on-site relay protection system can automatically complete verification on the on-site protection device, so that the on-site protection device can be ensured to be operated in a network.
According to the testing method of the on-site relay protection device, an on-site protection model of a transformer substation is constructed according to a power distribution network structure; the method comprises the steps that a total station system configuration SCD file of a transformer substation is imported into a local protection model for processing, operation configuration files and a prediction operation result of a plurality of local relay protection devices of the transformer substation are determined, wherein the operation configuration files comprise configuration information, test cases and a fixed value list of each local relay protection device; downloading the in-place protection model and the operation configuration file into an in-place relay protection testing device, and generating a plurality of simulation in-place relay protection devices respectively corresponding to the in-place relay protection devices in the in-place relay protection testing device; performing function test on the target simulation on-site relay protection device to obtain a test operation result of the target simulation on-site relay protection device, wherein the target simulation on-site relay protection device is any one of a plurality of simulation on-site relay protection devices; and generating a test report of the in-place relay protection device corresponding to the target simulation in-place relay protection device according to the test operation result and the prediction operation result of the target simulation in-place relay protection device. The embodiment of the disclosure can be free from the limitation of a field and a test environment, can quickly test and verify the faults of the device and the system in real time, improves the response speed, the data precision and the adaptive strength of the device, and ensures the safe, stable and reliable operation of the power distribution network.
The in-place relay protection embedded test method capable of switching the protection function according to the embodiment of the disclosure has the following beneficial technical effects: the method can quickly and completely build the in-place protection model of the transformer substation according to the structure of the power distribution network and different types of the in-place relay protection devices, improves the testing efficiency and reliability of the in-place relay protection devices, can adapt to installation testing in extreme environments, and is low in fault rate, simple in method structure and secondary circuit, easy to debug and maintain, convenient and quick to overhaul and replace, short in power failure time and few in personnel allocation requirements. In a word, the method can efficiently realize the aims of factory test and field replacement type maintenance of the in-situ relay protection device by combining with a virtual simulation automatic test method, can be flexibly adapted to different transformer substation environments, and has powerful technical guarantee for further improving the safety, reliability, flexibility and stability of a power grid.
It should be noted that, although the above embodiments are described as examples of the testing method and system for the in-situ relay protection device, those skilled in the art can understand that the disclosure should not be limited thereto. In fact, the user can flexibly set each step according to personal preference and/or actual application scene, as long as the technical scheme of the disclosure is met.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (9)
1. An in-situ relay protection embedded test method with switchable protection function, which is characterized in that the method has the switchable protection function, and comprises the following steps:
constructing a local protection model of the transformer substation according to the structure of the power distribution network;
importing a total station system configuration SCD file of a transformer substation into the on-site protection model for processing, and determining operation configuration files and predicted operation results of a plurality of on-site relay protection devices of the transformer substation, wherein the operation configuration files comprise configuration information, test cases and fixed value lists of the on-site relay protection devices;
downloading the in-place protection model and the operation configuration file into an in-place relay protection testing device, and generating a plurality of simulation in-place relay protection devices respectively corresponding to the in-place relay protection devices in the in-place relay protection testing device;
performing a function test on a target simulation on-site relay protection device to obtain a test operation result of the target simulation on-site relay protection device, wherein the target simulation on-site relay protection device is any one of the plurality of simulation on-site relay protection devices;
generating a test report of the on-site relay protection device corresponding to the target simulation on-site relay protection device according to the test operation result and the predicted operation result of the target simulation on-site relay protection device,
wherein the method further comprises:
respectively detecting whether the operation of each simulation on-site relay protection device is normal;
and when each simulation on-site relay protection device operates normally, switching to an on-site relay protection function test.
2. The method of claim 1, wherein each simulated in-situ relay protection device has the same operational attributes as each corresponding in-situ relay protection device,
the operation attributes at least comprise sampling value SV precision, virtual terminal correctness, protection action fixed value and tripping and closing action time.
3. The method of claim 1, further comprising:
and under the condition that the test operation result of the target simulation on-site relay protection device is the same as the prediction operation result, determining that the target simulation on-site relay protection device is normal.
4. The method of claim 1, wherein performing a functional test on a target simulation in-place relay protection device to obtain a test operation result of the target simulation in-place relay protection device comprises:
and according to the test case and the fixed value list of the target simulation in-place relay protection device, carrying out sampling value SV test on the target simulation in-place relay protection device to obtain an SV test operation result of the target simulation in-place relay protection device.
5. The method of claim 1, wherein performing a functional test on a target simulation in-place relay protection device to obtain a test operation result of the target simulation in-place relay protection device comprises:
and carrying out a general object-oriented substation event GOOSE open-in and open-out test on the target simulation on-site relay protection device according to the test case and the fixed value list of the target simulation on-site relay protection device to obtain a GOOSE open-in and open-out test operation result of the target simulation on-site relay protection device.
6. The method of claim 1, wherein performing a functional test on a target simulation in-place relay protection device to obtain a test operation result of the target simulation in-place relay protection device comprises:
and performing a fixed value function test on the target simulation in-place relay protection device according to the test case and the fixed value list of the target simulation in-place relay protection device to obtain a fixed value test operation result of the target simulation in-place relay protection device, wherein the fixed value test operation result comprises related protection action behaviors.
7. The method of claim 1, wherein performing a functional test on a target simulation in-place relay protection device to obtain a test operation result of the target simulation in-place relay protection device comprises:
according to the test case and the fixed value list of the target simulation in-place relay protection device, performing soft pressing plate remote control, fixed value calling and wave recording calling function tests on the target simulation in-place relay protection device to obtain a test operation result of the target simulation in-place relay protection device, wherein the test operation result at least comprises related protection action behaviors.
8. An in-situ relay protection embedded test system with switchable protection function is characterized in that the system has the switchable protection function and comprises a simulation modeling platform and an in-situ relay protection test device,
the simulation modeling platform is configured to:
constructing a local protection model of the transformer substation according to the structure of the power distribution network;
importing a total station system configuration SCD file of a transformer substation into the on-site protection model for processing, and determining operation configuration files and predicted operation results of a plurality of on-site relay protection devices of the transformer substation, wherein the operation configuration files comprise configuration information, test cases and fixed value lists of the on-site relay protection devices;
downloading the in-place protection model and the operation configuration file to an in-place relay protection testing device;
the in-place relay protection testing device is connected to the simulation modeling platform and is configured to:
generating a plurality of simulation on-site relay protection devices respectively corresponding to the on-site relay protection devices according to the downloaded on-site protection model and the running configuration file;
performing a function test on a target simulation on-site relay protection device to obtain a test operation result of the target simulation on-site relay protection device, wherein the target simulation on-site relay protection device is any one of the plurality of simulation on-site relay protection devices;
generating a test report of the on-site relay protection device corresponding to the target simulation on-site relay protection device according to the test operation result and the predicted operation result of the target simulation on-site relay protection device,
wherein the in-place relay protection testing device is further configured to:
respectively detecting whether the operation of each simulation on-site relay protection device is normal;
and when each simulation on-site relay protection device operates normally, switching to an on-site relay protection function test.
9. A method for in situ protection device replacement testing, the method comprising: connecting an in-place relay protection device to the in-place relay protection embedded test system with switchable protection function of claim 8, so that the in-place relay protection embedded test system with switchable protection function tests the in-place relay protection device.
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