CN112285459A - Flexible direct current line traveling wave protection test method and computer readable storage medium - Google Patents
Flexible direct current line traveling wave protection test method and computer readable storage medium Download PDFInfo
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Abstract
The invention provides a traveling wave protection test method for a flexible direct current line, which comprises the following steps: receiving fault simulation data of the flexible direct current line or fault recording data of the flexible direct current line; carrying out data format conversion on the fault simulation data or the fault recording data to obtain fault data of a data format required by the flexible direct current line traveling wave protection device to be tested, and outputting the fault data to the flexible direct current line traveling wave protection device to be tested; acquiring action information of the flexible direct current line traveling wave protection device; and sending the switching value corresponding to the action information to an upper computer, and enabling the upper computer to generate a test report of the flexible direct-current line traveling wave protection device according to the switching value corresponding to the action information. The prepared fault or normal operation data is converted into a standard form of a secondary side of the optical transformer of the direct current system without distortion and is output to the flexible direct current line traveling wave protection device, and the action performance test of the flexible direct current line traveling wave protection device is completed.
Description
Technical Field
The invention relates to the technical field of power system automation, in particular to a traveling wave protection test method for a flexible direct current line and a computer readable storage medium.
Background
Because of the importance of the relay protection device in the power system, the power grid has high requirements on the performance of the relay protection device, and the relay protection device needs to be tested comprehensively and systematically before research, development, production, installation and commissioning so as to ensure that the performance of the relay protection device reaches the requirements of the power system. However, in an actual power system, the electrical fault information for testing the stability, reliability and rapidity of the relay protection device cannot be reproduced repeatedly, so that a power system worker needs a relay protection testing device for reproducing the fault information of the power system and further testing and checking the relay protection device. Therefore, a relay protection testing device is required to be capable of truly simulating an input signal of a relay protection device, namely a signal on the secondary side of a power system, receiving an output signal of the relay protection device, comparing and analyzing similarities and differences between the output signal of the relay protection device under a certain input signal and an expected output signal, and judging reliability and correctness of actions of the relay protection device. In order to meet the requirement of ultra-high-speed line protection detection, the transient traveling wave protection tester needs to output an ultra-high-speed fault traveling wave signal, so that rich information stored in the fault signal is not lost. Therefore, the research of the ultra-high-speed traveling wave generation technology is very important for the development of the transient traveling wave protection tester.
The detection technology for the flexible line protection is not developed, the factory detection can utilize the perfection conditions of large-scale equipment such as laboratory RTDS and the like, but the field detection conditions are limited, and the conventional relay protection tester cannot output high-frequency signals due to the limitation of the voltage and current power amplification characteristics, so that the flexible line protection tester is not suitable for the field detection of the flexible line ultra-high speed protection. The RTDS can output 200kHz high-frequency signals at present, and meets the test requirement of flexible line ultra-high speed protection, but the RTDS cannot be applied to infrastructure field detection and protection annual inspection due to large simulation equipment. Therefore, research on field test technology is urgently needed.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
Therefore, one aspect of the present invention is to provide a method for testing traveling wave protection of a flexible dc line.
The invention also provides a method for testing the traveling wave protection of the flexible direct current line.
Yet another aspect of the present invention is directed to a computer-readable storage medium.
In view of this, according to an aspect of the present invention, a method for testing a traveling wave protection of a flexible dc line is provided, including: receiving fault simulation data of the flexible direct current line with a file format of a preset format or receiving fault recording data of the flexible direct current line; carrying out data format conversion on the fault simulation data or the fault recording data to obtain fault data in a data format required by the flexible direct-current line traveling wave protection device to be tested; outputting fault data to a flexible direct current line traveling wave protection device to be tested; acquiring action information of the flexible direct-current line traveling-wave protection device, wherein the action information is generated by the flexible direct-current line traveling-wave protection device in response to fault data; and sending the switching value corresponding to the action information to an upper computer so that the upper computer generates a test report of the flexible direct current line traveling wave protection device according to the switching value corresponding to the action information.
The invention provides a traveling wave protection test method for a flexible direct current line, which is used for a data processing device. Firstly, fault data is received, wherein the fault data can be field wave recording data of a flexible direct current line, and can also be fault simulation data generated by power system simulation software in a calculation mode. And then, according to a data format required by the flexible direct current line traveling wave protection device to be tested, converting the preprocessed fault simulation data or fault recording data into a standard form of a secondary side of the flexible direct current system optical transformer without distortion and outputting the standard form, so that fault data is obtained. And outputting the fault data to a tested device (namely a flexible direct current line traveling wave protection device), and making corresponding actions by the tested device according to information carried by the fault data. And the switching value corresponding to the action information is sent to the upper computer by collecting the action information of the tested device, so that the upper computer generates a test report of the traveling wave protection device of the flexible direct current line according to the switching value corresponding to the action information. The invention also provides a method for testing the traveling wave protection of the flexible direct current line, which is used for converting the prepared fault or normal operation data into a standard form of a secondary side of the optical transformer of the direct current system without distortion and outputting the standard form to the traveling wave protection device of the flexible direct current line so as to complete the action performance test of the traveling wave protection device of the flexible direct current line.
The method for testing the traveling wave protection of the flexible direct current line can also have the following technical characteristics:
in the above technical solution, the step of performing data format conversion on the fault simulation data or the fault recording data to obtain fault data in a data format required by the flexible dc line traveling wave protection device to be tested specifically includes: acquiring an interface protocol of a photocurrent transformer of a flexible direct current line; converting the data format of the fault simulation data or the fault recording data into a data frame with a corresponding format according to an interface protocol and a preset time interval; and performing electro-optical conversion on the data frame to obtain fault data.
In the technical solution, for the flexible direct current power transmission system, a data format corresponding to the optical transformer is a data format specified by an interface protocol of the measurement device and the control and protection device, and is generally determined by a data format required by the traveling wave protection device (i.e., the relay protection device) of the flexible direct current line. The method comprises the steps of converting a data format of prepared fault simulation data or fault recording data into a data frame in a corresponding format by acquiring an interface protocol of a light current transformer of a flexible direct current line according to the interface protocol and a preset time interval, performing electro-optical conversion on the data frame, and converting fault data taking a digital signal as a carrier into an optical signal of a secondary side of the light current transformer for output. The prepared fault or normal operation data is converted into a standard form of a secondary side of the optical transformer of the direct current system without distortion and is output to the relay protection device, and the action performance test of the relay protection device is completed.
In any of the above technical solutions, the preset format is a general format for transient data exchange of the power system.
In the technical scheme, the preset format is a common format comtrade format for transient data exchange of the power system.
In any of the above technical solutions, the interface protocol is one of IEC60870-5 series protocols.
In the technical scheme, an interface protocol of an interface module is determined according to a data format required by the flexible direct-current line traveling wave protection device. The data format of the data frame is determined by the interface protocol.
In any of the above technical solutions, the value range of the preset time interval is: 15 microseconds to 25 microseconds; the range of data sampling rates for the data frames is: 40 khz to 60 khz; the range of data transmission rates is: 15 megabits/second to 25 megabits/second.
In the technical solution, a value range of the preset time interval and a format of the data frame are determined according to an interface protocol of the optical transformer, specifically, the value range of the preset time interval is determined according to a data transmission rate corresponding to the interface protocol, and herein, the value range of the preset time interval is 15 microseconds to 25 microseconds, but is not limited thereto. The range of data sampling rates for the data frames is: 40 khz to 60 khz, the data transmission rate ranges from: 15 megabits/second to 25 megabits/second. But are not limited thereto.
In any of the above technical solutions, the preset time interval is 20 microseconds; the data length of the data frame is 208 bits; the data sampling rate of the data frame is 50 kilohertz; the data transmission rate of the data frame is 20 mbit/sec.
In the technical solution, the preset time interval is 20 microseconds, the data length of the data frame is 208 bits, the data sampling rate is 50khz, and the data transmission rate is 20mbit/s, but not limited thereto.
According to another aspect of the present invention, a method for testing travelling wave protection of a flexible dc line is provided, including: generating fault simulation data of the flexible direct current line or receiving fault recording data of the flexible direct current line according to the electromagnetic transient simulation program; preprocessing the fault simulation data to enable the file format of the fault simulation data to be a preset format; sending the preprocessed fault simulation data or fault recording data to a data processing device so that the data processing device can carry out data format conversion on the fault simulation data or the fault recording data to obtain fault data in a data format required by the flexible direct-current line traveling wave protection device to be tested, and outputting the fault data to the flexible direct-current line traveling wave protection device to be tested so as to acquire action information of the flexible direct-current line traveling wave protection device; receiving a switching value corresponding to the action information sent by the data processing device, and generating a test report of the flexible direct-current line traveling wave protection device according to the switching value corresponding to the action information; the action information is generated by the flexible direct current line traveling wave protection device in response to fault data.
The invention provides a traveling wave protection test method for a flexible direct current line, which is used for embedded computer equipment (an upper computer). The fault data required by the test can be field wave recording data of the flexible direct current line, and can also be fault simulation data generated by calculation of simulation software of the power system. Firstly, generating fault simulation data of a flexible direct current line by using a preset electromagnetic transient simulation program, or receiving fault recording data recorded by a field fault recording device, and uniformly converting files of the fault simulation data into a format which can be processed by a computer through preprocessing. And sending the fault simulation data or the fault recording data with the file format being a preset format to a data processing device. And the data processing device converts the data format of the fault simulation data to obtain fault data in a data format required by the flexible direct-current line traveling wave protection device to be tested, and outputs the fault data to the flexible direct-current line traveling wave protection device to be tested so as to acquire action information of the flexible direct-current line traveling wave protection device. The switching value corresponding to the action information sent by the data processing device is received, the action behavior of the tested device is read, the action performance of the relay protection device can be judged, and a test report is automatically formed.
In the above technical solution, the step of generating fault simulation data of the flexible dc line according to the electromagnetic transient simulation program specifically includes: constructing a flexible direct current power transmission system according to an electromagnetic transient simulation program, and setting simulation parameters, wherein the simulation parameters comprise normal operation conditions and fault conditions inside and outside the area; and performing transient calculation according to the flexible direct current power transmission system to generate fault simulation data.
In the technical scheme, the flexible direct current transmission system can be set up by presetting an electromagnetic transient simulation program (such as an electromagnetic transient program EMTP or PSCAD), and the conditions of normal operation, internal and external faults and the like are set to generate fault simulation data, so that fault data are provided for testing the flexible direct current line traveling wave protection device.
In any of the above technical solutions, the method further includes: and adjusting the output step length of the fault simulation data according to the data transmission rate corresponding to the data format of the photocurrent transformer of the flexible direct current line.
In the technical scheme, for the flexible direct current power transmission system, the data format corresponding to the optical transformer is a data format specified by an interface protocol of the measurement device and the control and protection device, and is generally determined by a data format required by a relay protection device (a flexible direct current line traveling wave protection device, specifically, a flexible direct current line traveling wave ranging and traveling wave protection device). And adjusting the output step length according to the data transmission rate of the interface of the relay protection device.
In any of the above technical solutions, the value range of the output step length is: 15 microseconds to 25 microseconds.
In the technical scheme, the value range of the output step length is as follows: 15 microseconds to 25 microseconds, but is not limited thereto.
According to a further aspect of the present invention, a computer-readable storage medium is provided, on which a computer program is stored, and the computer program, when executed by a processor, implements the method for testing travelling wave protection of a flexible direct current line according to any one of the above second aspects.
The computer readable storage medium provided by the present invention, when being executed by a processor, implements the steps of the method for testing a travelling wave protection of a flexible direct current line according to any of the above second technical solutions, so that the computer readable storage medium includes all the beneficial effects of the method for testing a travelling wave protection of a flexible direct current line.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic flow chart of a method for testing travelling wave protection of a flexible direct current line according to an embodiment of the present invention; .
Fig. 2 is a schematic flow chart of a method for testing traveling wave protection of a flexible direct current line according to another embodiment of the present invention;
fig. 3 shows a schematic flow chart of a method for testing traveling wave protection of a flexible direct current line according to still another embodiment of the present invention;
fig. 4 shows a schematic diagram of a travelling wave protection test apparatus for a flexible direct current line according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a working flow of the apparatus for testing traveling wave protection of a flexible dc line according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
According to an embodiment of one aspect of the invention, a method for testing traveling wave protection of a flexible direct current line is provided.
Fig. 1 shows a schematic flow chart of a method for testing travelling wave protection of a flexible direct current line according to an embodiment of the present invention. The method for testing the traveling wave protection of the flexible direct current line comprises the following steps:
102, receiving fault simulation data of the flexible direct current line or fault recording data of the flexible direct current line, wherein the file format of the fault simulation data is a preset format;
and step 110, sending the switching value corresponding to the action information to an upper computer, so that the upper computer generates a test report of the flexible direct current line traveling wave protection device according to the switching value corresponding to the action information.
The method for testing the traveling wave protection of the flexible direct current line comprises the steps of firstly receiving fault data, wherein the fault data can be field wave recording data of the flexible direct current line or fault simulation data generated by power system simulation software, and uniformly converting files of the fault simulation data into a format which can be processed by a computer through preprocessing. And then, according to a data format required by the flexible direct current line traveling wave protection device to be tested, converting the preprocessed fault simulation data or fault recording data into a standard form of a secondary side of the flexible direct current system optical transformer without distortion and outputting the standard form, so that fault data is obtained. And outputting the fault data to a tested device (namely a flexible direct current line traveling wave protection device), and making corresponding actions by the tested device according to information carried by the fault data. And the switching value corresponding to the action information is sent to the upper computer by collecting the action information of the tested device, so that the upper computer generates a test report of the traveling wave protection device of the flexible direct current line according to the switching value corresponding to the action information. The invention also provides a method for testing the traveling wave protection of the flexible direct current line, which is used for converting the prepared fault or normal operation data into a standard form of a secondary side of the optical transformer of the direct current system without distortion and outputting the standard form to the traveling wave protection device of the flexible direct current line so as to complete the action performance test of the traveling wave protection device of the flexible direct current line.
Fig. 2 shows a schematic flow chart of a method for testing traveling wave protection of a flexible direct current line according to another embodiment of the present invention. The method for testing the traveling wave protection of the flexible direct current line comprises the following steps:
202, receiving fault simulation data of the flexible direct current line or fault recording data of the flexible direct current line;
and step 212, sending the switching value corresponding to the action information to an upper computer, so that the upper computer generates a test report of the flexible direct current line traveling wave protection device according to the switching value corresponding to the action information.
In this embodiment, for the flexible direct current power transmission system, the data format corresponding to the optical transformer is a data format specified by an interface protocol between the measurement device and the control and protection device, and is generally determined by a data format required by the flexible direct current line traveling wave protection device (i.e., the relay protection device). The method comprises the steps of converting a data format of prepared fault simulation data or fault recording data into a data frame in a corresponding format by acquiring an interface protocol of a light current transformer of a flexible direct current line according to the interface protocol and a preset time interval, performing electro-optical conversion on the data frame, and converting fault data taking a digital signal as a carrier into an optical signal of a secondary side of the light current transformer for output. The prepared fault or normal operation data is converted into a standard form of a secondary side of the optical transformer of the direct current system without distortion and is output to the relay protection device, and the action performance test of the relay protection device is completed.
In any of the above embodiments, the predetermined format is a common format for transient data exchange of the power system.
In this embodiment, the preset format is a common format comtrade format for power system transient data exchange.
In any of the above embodiments, the value range of the preset time interval is as follows: 15 microseconds to 25 microseconds.
In this embodiment, a value range of the preset time interval is determined according to an interface protocol of the optical transformer, specifically, according to a data transmission rate corresponding to the interface protocol, where the value range of the preset time interval is 15 microseconds to 25 microseconds, but is not limited thereto.
In any of the above embodiments, the predetermined time interval is 20 microseconds; the data length of the data frame is 208 bits; the range of data sampling rates for the data frames is: 40 khz to 60 khz; the range of data transmission rates is: 15 megabits/second to 25 megabits/second.
In this embodiment, the predetermined time interval is 20 microseconds; the format of the data frame is specifically FT3 format, and the data length of the data frame is 208 bits; the range of data sampling rates for the data frames is: 40 khz to 60 khz, the data transmission rate ranges from: 15 megabits/second to 25 megabits/second. But are not limited thereto.
In any of the above embodiments, the data sampling rate is 50 kilohertz; the data transfer rate is 20 mbits/sec.
In this embodiment, the data sampling rate is 50 kilohertz; the data transmission rate is 20mbit/s, but is not limited thereto.
According to another aspect of the embodiment of the invention, a method for testing the traveling wave protection of the flexible direct current line is provided.
Fig. 3 shows a schematic flow chart of a method for testing traveling wave protection of a flexible direct current line according to still another embodiment of the present invention. The method for testing the traveling wave protection of the flexible direct current line comprises the following steps:
308, receiving the switching value corresponding to the action information sent by the data processing device, and generating a test report of the flexible direct-current line traveling wave protection device according to the switching value corresponding to the action information;
the action information is generated by the flexible direct current line traveling wave protection device in response to fault data.
The fault data required by the test of the traveling wave protection test method for the flexible direct current line provided by the embodiment of the invention can be field wave recording data of the flexible direct current line and fault simulation data generated by simulation software of a power system. Firstly, generating fault simulation data of the flexible direct current line by using a preset electromagnetic transient simulation program, receiving fault recording data recorded by a field fault recording device, and sending the fault simulation data or the fault recording data to a data processing device. And the data processing device converts the data format of the fault simulation data to obtain fault data in a data format required by the flexible direct-current line traveling wave protection device to be tested, and outputs the fault data to the flexible direct-current line traveling wave protection device to be tested so as to acquire action information of the flexible direct-current line traveling wave protection device. The switching value corresponding to the action information sent by the data processing device is received, the action behavior of the tested device is read, the action performance of the relay protection device can be judged, and a test report is automatically formed.
In the above embodiment, the step of generating fault simulation data of the flexible dc line according to the electromagnetic transient simulation program specifically includes: constructing a flexible direct current power transmission system according to an electromagnetic transient simulation program, and setting simulation parameters, wherein the simulation parameters comprise normal operation conditions and fault conditions inside and outside the area; and performing transient calculation according to the flexible direct current power transmission system to generate fault simulation data.
In this embodiment, a flexible direct current power transmission system can be set up by presetting an electromagnetic transient simulation program (such as an electromagnetic transient program EMTP or a PSCAD), and conditions such as normal operation, internal and external faults and the like are set to generate fault simulation data, so that fault data is provided for testing the flexible direct current line traveling wave protection device.
In any of the above embodiments, the method for testing the traveling wave protection of the flexible dc line further includes: and adjusting the output step length of the fault simulation data according to the data transmission rate corresponding to the data format of the photocurrent transformer of the flexible direct current line.
In this embodiment, for the flexible direct current power transmission system, the data format corresponding to the optical transformer is a data format specified by an interface protocol of the measurement device and the control and protection device, and is generally determined by a data format required by a relay protection device (a flexible direct current line traveling wave protection device, and specifically, a flexible direct current line traveling wave ranging and traveling wave protection device). And adjusting the output step length according to the data transmission rate of the interface of the relay protection device.
In any of the above embodiments, the value range of the output step size is: 15 microseconds to 25 microseconds.
In this embodiment, the value range of the output step is: 15 microseconds to 25 microseconds, but is not limited thereto.
Detailed description of the preferred embodiment 1
Fig. 4 shows a schematic diagram of a travelling wave protection testing apparatus for a flexible direct current line according to an embodiment of the present invention. As shown in fig. 4, the traveling wave protection device for the flexible dc line can be divided into the following two parts:
1) data preprocessing module (upper computer end): an embedded computer 400.
2) Data format conversion module (data processing device side): a digital signal processor 402, a data packing unit 404, an electro-optical conversion interface 406, and a switching value detection circuit 408.
The embedded computer 400 may run host computer software dedicated for the transient traveling wave protection tester, transmit power system transient fault simulation data calculated by using an electromagnetic transient program (EMTP, PSCAD) or fault recording data recorded by a fault recording device to the data format conversion module, receive the operation condition of the device under test fed back by the switching value detection circuit 408, and form a test report after analysis.
The data preprocessing module converts the file format into a standard format which can be processed by a computer, if the input data is simulation data generated by the simulation software of the power system, the output step length is adjusted to be the same as the output rate specified by the interface protocol, the output data is input into the computer, and the output file format is converted into a format which can be processed by the computer; and if the recorded data is the field wave recording data, directly converting the data format.
After the file format conversion is completed, after the digital signal processor 402 receives the data information transmitted by the upper computer and the command for starting the test, the fault data of the power system is output to a data format conversion module for data format conversion, and the data conversion module is divided into two parts: a data packetizing unit 404 and an electrical-to-optical conversion interface 406. The data packing unit 404 packs the data into a data frame and outputs the data frame to the electro-optical conversion interface, and the electro-optical conversion interface 406 converts the digital signal into an optical signal on the secondary side of the optical transformer and outputs the optical signal. The prepared fault or normal operation data is converted into a standard form of a secondary side of the direct-current system optical transformer without distortion and is output to the relay protection device 410, and the action performance test of the relay protection device 410 is completed.
The action information of the relay protection device 410 is collected by the switching value detection circuit 408, and the switching value detection circuit 408 can record the action information of the device to be detected and feed back the action information to the upper computer. And the upper computer and the DSP carry out data communication through a serial port.
For the dc system, the data format corresponding to the optical transformer is the data format specified by the interface protocol between the measuring device and the control and protection device, and is generally determined by the data format required by the relay protection device 410.
Specific example 2
Fig. 5 is a schematic diagram illustrating a working flow of the apparatus for testing traveling wave protection of a flexible dc line according to an embodiment of the present invention. The embodiment is applied to the test method flow when the input data is the simulation data of the four-terminal flexible direct-current transmission system. The test method has the following:
an upper computer end:
step 1) constructing a four-terminal flexible direct-current power transmission system based on a PSCAD platform, setting conditions such as normal operation, internal and external faults and the like, and generating simulation data. In this embodiment, the data sampling rate is 50kHz, and the simulation step size can be set to 20 μ s.
And 2) inputting the generated simulation data into a test system, preprocessing the simulation data, converting the format of the data file into a comtrade format, and adjusting the output step length according to the data transmission rate of the interface of the relay protection device, wherein the data frame data length of the protocol standard in the embodiment is 208 bits, the data sampling rate is 50kHz, and the data transmission rate is 20Mbit/s, so that the data transmission rate can meet the requirement.
And 3) reading the action behavior of the tested device by receiving the action information sent by the data processing terminal, judging the action performance of the relay protection device and automatically forming a test report.
A data processing end:
step 1) packing the data into a data frame form through a corresponding data packing unit 304, specifically, the data frame form is FT3 format, table 1 is an FT3 standard data format table of IEC60870-5-1 protocol, table 1 shows a flexible-direct system measuring device, a control and protection device, an ABB valve control interface protocol, a medium multimode optical fiber, an optical wavelength of 820nm-860nm, a link layer conforms to the FT3 format of IEC60870-5-1, an effective data rate of 20Mbit/s, and anti-Manchester coding.
The FT3 format data is 26 bytes long, and 208 bits in total: 1-16 bits are frame headers; the 17-24 bits are equipment codes; the 25-32 bits are used for determining whether the six information channels in the FT3 format are effective or not, 0 is effective, and 1 is ineffective; each 24 bits of 33-176 bits are a data channel for carrying data information, wherein bit23 is a sign bit; 177-192 bits are a sampling counter; 193-208 bits are used as check codes generated by the data for checking data transmission. The data sampling rate is 50kHz, and one data frame is packed every 20 mus and output to the electro-optical conversion interface 306.
Step 2) the electro-optical conversion interface 306 converts the received data frame into FT3 format output conforming to IEC60870-5-1 protocol without distortion.
And 3) transmitting the data in the FT3 format conforming to the IEC60870-5-1 protocol to a relay protection device, and making corresponding actions by the protection device according to the information carried by the signal.
And 4) acquiring action information of the protection device, and sending the action information to the upper computer so that the upper computer can read in action behaviors of the tested device, judge the action performance of the relay protection device and automatically form a test report.
TABLE 1 FT3 Standard data Format Table for IEC60870-5-1 protocol
According to an embodiment of a further aspect of the present invention, a computer-readable storage medium is proposed, on which a computer program is stored, which when executed by a processor implements the flexible direct current line travelling wave protection testing method according to any one of the embodiments of the second aspect.
The present invention provides a computer readable storage medium, and a computer program when executed by a processor implements the steps of the flexible direct current line traveling wave protection test method according to any of the embodiments of the second aspect, so that the computer readable storage medium includes all the beneficial effects of the flexible direct current line traveling wave protection test method.
In the description herein, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly stated or limited otherwise; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A traveling wave protection test method for a flexible direct current line is characterized by comprising the following steps:
receiving fault simulation data of a flexible direct-current line with a file format of a preset format or fault recording data of the flexible direct-current line;
performing data format conversion on the fault simulation data or the fault recording data to obtain fault data in a data format required by the flexible direct-current line traveling wave protection device to be tested;
outputting the fault data to a flexible direct current line traveling wave protection device to be tested;
acquiring action information of the flexible direct-current line traveling wave protection device, wherein the action information is generated by the flexible direct-current line traveling wave protection device in response to the fault data;
and sending the switching value corresponding to the action information to an upper computer so that the upper computer generates a test report of the flexible direct current line traveling wave protection device according to the switching value corresponding to the action information.
2. The method according to claim 1, wherein the step of performing data format conversion on the fault simulation data or the fault recording data to obtain fault data in a data format required by the flexible direct-current line traveling wave protection device to be tested specifically comprises:
acquiring an interface protocol of a photocurrent transformer of the flexible direct current line;
converting the data format of the fault simulation data or the fault recording data into a data frame with a corresponding format according to the interface protocol and a preset time interval;
and performing electro-optic conversion on the data frame to obtain fault data.
3. The traveling wave protection test method for the flexible direct current line according to claim 2,
the preset format is a general format of transient data exchange of the power system.
4. The traveling wave protection test method for the flexible direct current line according to claim 3,
the interface protocol is one of IEC60870-5 series protocols.
5. The traveling wave protection test method for the flexible direct current line according to claim 4,
the value range of the preset time interval is as follows: 15 microseconds to 25 microseconds.
The range of data sampling rates of the data frames is: 40 khz to 60 khz;
the range of the data transmission rate of the data frame is as follows: 15 megabits/second to 25 megabits/second.
6. The traveling wave protection test method for the flexible direct current line according to claim 5,
the preset time interval is 20 microseconds;
the data length of the data frame is 208 bits;
the data sampling rate is 50 kilohertz;
the data transfer rate is 20 mbits/sec.
7. A traveling wave protection test method for a flexible direct current line is characterized by comprising the following steps:
generating fault simulation data of a flexible direct-current line according to a preset electromagnetic transient simulation program or receiving fault recording data of the flexible direct-current line;
preprocessing the fault simulation data to enable the file format of the fault simulation data to be a preset format;
sending the preprocessed fault simulation data or the preprocessed fault recording data to a data processing device so that the data processing device performs data format conversion on the fault simulation data or the fault recording data to obtain fault data of a data format required by a flexible direct-current line traveling wave protection device to be tested, and outputting the fault data to the flexible direct-current line traveling wave protection device to be tested so as to acquire action information of the flexible direct-current line traveling wave protection device;
receiving the switching value corresponding to the action information sent by the data processing device, and generating a test report of the flexible direct-current line traveling wave protection device according to the switching value corresponding to the action information;
and the action information is generated by the flexible direct current line traveling wave protection device in response to the fault data.
8. The traveling wave protection test method for the flexible direct current line according to claim 7, wherein the step of generating fault simulation data of the flexible direct current line according to an electromagnetic transient simulation program specifically comprises:
constructing a flexible direct current power transmission system according to the electromagnetic transient simulation program, and setting simulation parameters, wherein the simulation parameters comprise normal operation conditions and fault conditions inside and outside the area;
and performing transient calculation according to the flexible direct current power transmission system to generate the fault simulation data.
9. The method for testing traveling wave protection of a flexible direct current line according to claim 7, further comprising:
and adjusting the output step length of the fault simulation data according to the data transmission rate corresponding to the data format of the photocurrent transformer of the flexible direct current line.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the flexible direct current line traveling wave protection testing method according to any one of claims 7 to 9.
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