CN107976598B - Method for testing loss of SOE signal after line fault of intelligent substation - Google Patents
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Abstract
The invention is suitable for the technical field of power dispatching automation, and provides a method for testing an SOE signal lost after a line fault of an intelligent substation. The test environment reproduces the station-side environment as much as possible. The telecontrol device is tested by building a test environment, the test result is real and reliable, the test environment is built, the detection work of the telecontrol device is carried out, the risk of carrying out the test work on the operation equipment directly to the power grid is avoided, and the safety and the stability of the system operation are improved.
Description
Technical Field
The invention belongs to the technical field of power dispatching automation, and particularly relates to a method for testing loss of an SOE signal after a line fault of an intelligent substation.
Background
And when the line Of the intelligent substation fails, the telecontrol device can upload the system accident Of the dispatching master station and an SOE signal thereof, and switch deflection and an SOE signal thereof.
At present, the test of the secondary system of the intelligent substation is mainly divided into three methods:
firstly, a relay protection tester is used for carrying out single body test on partial equipment of a secondary system.
And secondly, physically simulating a primary system through a dynamic simulation experiment, injecting the actual transformer output serving as a data source into a tested secondary system, and judging the functional correctness through behavior response.
The third method is to generate network message to excite the secondary device to act, so as to check the network function of the secondary system.
All three methods give solutions specifically for the local aspect of secondary system testing, lacking integrity. The problem faced by the secondary system test of the current intelligent station is difficult to be thoroughly solved from the viewpoint of system integrity. If the test of the telecontrol device is directly carried out on an actually-operated system, the safety risk is high, the performance test of the equipment is not comprehensive, the test index cannot be quantized, and the safe operation of the operating transformer substation is influenced.
Disclosure of Invention
In view of this, the embodiment of the invention provides a method for testing loss of an SOE signal after a line fault of an intelligent substation, so as to solve the problems that in the prior art, direct test on a telecontrol device has a high safety risk and affects safe operation of the substation.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is: a method for testing loss of SOE signals after line faults of an intelligent substation comprises the following steps:
(1) building a test system, wherein the test system comprises a telecontrol device, 2 measurement and control devices, a test and protection device, a background data simulation device, a background simulation monitoring device and a master scheduling simulation device;
(2) connecting the line measurement and control input and the public measurement and control input in parallel, simulating the generation of the line measurement and control input, setting first background data, continuously sending the first background data to the end, and testing an SOE signal;
(3) on the basis of the step (2), the measurement and control device is used for enabling the measurement and protection device to actually send protection start, first background data is set, the first background data is continuously sent to the end, and SOE signals are tested;
(4) setting second background data on the basis of the step (3), and continuously sending the second background data to the end to test the SOE signal;
(5) setting third background data on the basis of the step (3), wherein the third background data are continuously sent to the end of the SOE signal test;
(6) connecting 2 measurement and control devices in parallel with 98 switches, simulating protection action to trigger warning direct transmission, setting fourth background data, continuously transmitting the fourth background data to the end, and testing SOE signals;
(7) the simulation device is used for reproducing the information simulation occurrence message of the monitoring record fault moment, setting fourth background data, and continuously sending the fourth background data to the end to test the SOE signal;
(8) and line measurement and control opening and public measurement and control opening and changing positions, setting fifth background data, and continuously sending the fifth background data to the end to test the SOE signal.
Further, the first background data is that the change telemetry is carried out once every 10ms, the number of the telemetry points is 8, and the background telemetry is carried out 96 every 500 ms.
Further, the second background data is that the change telemetry is carried out once every 10ms, 8 telemetry points are provided, and the background telemetry is carried out once every 500 ms for 144.
Further, the third background data is that the change telemetry is carried out once every 10ms, 8 telemetry points are totally arranged, and the background telemetry is carried out once every 500 ms and 192.
Further, the fourth background data is that the change telemetry is carried out every 10ms, and the number of the telemetry points is 8.
Further, the SOE signals are tested for multiple times in the steps (2) to (8).
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the invention builds a test environment, which comprises a main telecontrol device, 2 measurement and control devices, 1 measurement and protection device, a background data simulation device, a background monitoring simulation device and a master scheduling simulation device which are used for networking and testing when the intelligent substation with a fault is recovered to an accident on site, wherein the measurement and control and protection are set according to site parameters, and a GPS carries out clock synchronization on equipment in a B code mode. The test environment reproduces the station-side environment as much as possible. The telecontrol device is tested by building a test environment, the test result is real and reliable, the test environment is built, the detection work of the telecontrol device is carried out, the risk of carrying out the test work on the operation equipment directly to the power grid is avoided, and the safety and the stability of the system operation are improved.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a logic flow diagram of a method for testing a lost SOE signal after a line fault of an intelligent substation according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a test environment provided by an embodiment of the invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
As shown in fig. 1 and fig. 2, a logic flow chart of a method for testing a lost SOE signal after a line fault of an intelligent substation provided by an embodiment of the present invention includes the following steps:
(1) building a test system, wherein the test system comprises a telecontrol device, 2 CSI200E measurement and control devices, a CSC211 measurement and protection device, a background data simulation device, a monitoring simulation background device and a scheduling simulation main station device;
(2) connecting the line measurement and control input and the public measurement and control input in parallel, simulating the generation of the line measurement and control input, setting first background data, continuously sending the first background data to the end, and testing an SOE signal;
(3) on the basis of the step (2), the CSC211 test protection device is enabled to actually transmit protection starting through the CSI200E test control device, first background data are set, the first background data are continuously transmitted to the end, and SOE signals are tested;
(4) setting second background data on the basis of the step (3), and continuously sending the second background data to the end to test the SOE signal;
(5) setting third background data on the basis of the step (3), wherein the third background data are continuously sent to the end of the SOE signal test;
(6) connecting 2 CSI200E measurement and control devices in parallel, switching in 98 pieces, simulating a protection action to trigger warning direct transmission, setting fourth background data, continuously sending the fourth background data to an end, and testing an SOE signal;
(7) the simulation device is used for reproducing the information simulation occurrence message of the monitoring record fault moment, setting fourth background data, and continuously sending the fourth background data to the end to test the SOE signal;
(8) and line measurement and control opening and public measurement and control opening and changing positions, setting fifth background data, and continuously sending the fifth background data to the end to test the SOE signal.
The invention builds a test environment which comprises a main telecontrol device, 2 CSI200E measurement and control devices, 1 CSC211 measurement and protection device, a background data simulation device, a background monitoring simulation device and a master scheduling simulation device which are used for networking and testing when an accident is removed to the site of a failed intelligent substation, wherein the measurement and control and protection are set according to site parameters, and a GPS carries out clock synchronization on equipment in the network in a B code mode. The test environment reproduces the station-side environment as much as possible. The telecontrol device is tested by building a test environment, the test result is real and reliable, the test environment is built, the detection work of the telecontrol device is carried out, the risk of carrying out the test work on the operation equipment directly to the power grid is avoided, and the safety and the stability of the system operation are improved.
The method is described below with reference to a specific example.
A262 switch accident of a certain 220kV intelligent substation circuit is switched off, the reclosing is successful, the scheduling master station system only receives a 262 switch closing SOE signal and does not receive a switch switching-off SOE signal, and according to the fault phenomenon analysis, the direction of a positioning problem is as follows:
in the monitoring record, protection starting signals are provided before and after the SOE signal message lost by the telecontrol device, and meanwhile, the SOE lost node in the 104 message is provided with a 2-frame alarm direct transmission message for protection starting, so that the SOE loss caused by alarm direct transmission processing is suspected.
At the time of failure, the instantaneous flow of the message is increased, the telecontrol device receives 54 pieces of information in a very short time, and the SOE loss caused by exceeding the processing capacity of the telecontrol device is presumed.
According to the two-point problem positioning direction, a testing method for losing SOE signals after line faults of the intelligent substation is designed, a testing environment is set up, wherein a field telecontrol device, 2 CSI200E measurement and control and 1 CSC211 measurement and protection device, a simulated background data device, a simulated monitoring background device and a simulated scheduling main station device are networked for testing, the measurement and control and protection are set according to field parameters, and a GPS carries out clock synchronization on devices in the network in a B code mode. And carrying out a plurality of groups of experiments, and searching the reason for losing the SOE signal after the line fault of the intelligent substation.
The data flow of the experiment is as follows: the two measurement and control devices, one protection device and the simulation device are used as signal sources to generate remote signaling, remote measuring and SOE signals to a station control layer network, a large amount of signal changes are simulated through the simulation device, and data flow is large; simulating a monitoring background and a remote machine, wherein the data volume received by all change signals (including remote signaling, remote monitoring and SOE) in a receiving station control layer network is the sum of signals sent by an actual device and a simulation device; and the remote motivation forwards the data change in the remote action point table to the analog scheduling master station, and the data volume of the transmitted burst data is less than that of the data volume received by the station control layer.
According to various aspects of tests, the telecontrol machines do not find the phenomenon of message loss, and because the station telecontrol device belongs to double-main configuration, the probability of message loss of two telecontrol machines is very low, and the discussion is carried out aiming at the network structure and the device communication mechanism in the station, the judgment problem occurs on a station control layer switch, and the telecontrol machines do not receive the messages due to the fact that the messages are lost by the exchange of the station control layer, so that the alarm information of a main station is lost.
The experiments were carried out in groups as follows:
experiment one:
background data: change telemetry is one every 10ms for 8 telemetry points, and background telemetry is 96 every 500 ms (a set of telemetry 16 point shifts is sent every 10 ms).
Actual motion signal: the line measurement and control input 1 and the public measurement and control input 32 are connected in parallel to ensure that signals occur simultaneously; line measurement and control openings 53, 56 (2 protection action signals at the time of failure) occur in a simulation.
The experimental process comprises the following steps: continuously transmitting the background data until the experiment is finished; the actual motion signal changes every three seconds for a total of 10 times (30 seconds).
The experimental results are as follows: after 20 repeated experiments, no SOE loss occurs, and the phenomenon that two lost signals are consistent in double time scales can be reproduced.
And (4) experimental conclusion: the positioning problem 2 in the first section does not occur in this experiment, which indicates that it is not the cause of the lost signal. At a data throughput of 800 telemetry data refreshes per second and 190 telemetry changes, the field phenomenon was not reproduced.
Experiment two:
background data: the same experiment as the first experiment.
Actual motion signal: on the basis of the first experiment, the protection device is enabled to be started in the experiment process through the tester, and the situation of the positioning problem 1 is simulated.
The experimental process comprises the following steps: the same experiment as the first experiment.
The experimental results are as follows: after 20 repeated experiments, no SOE loss occurs, the phenomenon that two lost signals are consistent in double time scales can be reproduced, and simultaneously, a message for directly transmitting an alarm appears.
And (4) experimental conclusion: the positioning problem 2 in the first section does not occur in this experiment, which indicates that it is not the cause of the lost signal. The positioning problem 1 in the first section does not occur in this experiment, which indicates that it is not the cause of the lost signal. At a data throughput of 800 telemetry data refreshes per second and 190 telemetry changes, the field phenomenon was not reproduced.
Experiment three:
background data: change telemetry is one per 10ms for 8 telemetry points, and background telemetry is 144 per 500 ms (a set of 16-point changes is sent per 10 ms).
Actual motion signal: on the basis of the first experiment, the protection device is enabled to be started in the experiment process through the tester, and the situation of the positioning problem 1 is simulated.
The experimental process comprises the following steps: the same experiment as the first experiment.
The experimental results are as follows: after 20 repeated experiments, no SOE loss occurs, the phenomenon that two lost signals are consistent in double time scales can be reproduced, and simultaneously, a message for directly transmitting an alarm appears.
And (4) experimental conclusion: the positioning problem 2 in the first section does not occur in this experiment, which indicates that it is not the cause of the lost signal. The positioning problem 1 in the first section does not occur in this experiment, which indicates that it is not the cause of the lost signal. At a data throughput of 800 telemetry data refreshes per second and 288 telemetry changes, the field phenomenon was not reproduced.
Experiment four:
background data: change telemetry is one per 10ms for 8 telemetry points, and background telemetry is 192 per 500 ms (a set of telemetry 16 point shifts is sent per 10 ms).
Actual motion signal: on the basis of the first experiment, the protection device is enabled to be started in the experiment process through the tester, and the situation of the positioning problem 1 is simulated.
The experimental process comprises the following steps: the same experiment as the first experiment.
The experimental results are as follows: the experiments were repeated for 5 groups, each of which had 1 to 2 losses of SOE.
And (4) experimental conclusion: loss of SOE occurred at a data throughput of 800 telemetry data refreshes per second and 284 telemetry changes.
Experiment five:
background data: change telemetry is one every 10ms for 8 telemetry points.
Actual motion signal: 2 stations measure and control and connect 98 switches (196 SOE signals are connected and disconnected once), and simulate protection action to trigger alarm direct transmission.
The experimental process comprises the following steps: the background data is continuously transmitted, and the actual action signal completes the parallel connection signal and divides and combines two actions within 600ms (196 remote signaling displacements and 196 SOEs within 600 ms).
The experimental results are as follows: and when SOE of different points with repeated time scales appears, the protected alarm information is directly transmitted. Repeat 4 groups of experiments, no loss of SOE; simulating 5 or more experiments, loss of SOE occurred.
And (4) experimental conclusion: the loss of SOE was replicated at 800 telemetry data refreshes per second and an average of 326 telemetry changes per second with the data throughput of SOE, but this data volume had exceeded that of a typical avalanche test.
Experiment six:
background data: change telemetry is one every 10ms for 8 telemetry points.
Actual motion signal: and the simulation device is used for reproducing the information simulation generation message of the monitoring record fault moment.
The experimental process comprises the following steps: the background data is continuously sent, and the parallel connection signal is divided and combined twice within 600ms of the actual action signal.
The experimental results are as follows: and repeating the 5 groups of experiments, wherein no SOE is lost, messages with the same SOE time scale appear, and warning direct transmission messages appear.
And (4) experimental conclusion: under the condition of refreshing 800 telemetering data per second, the current site telemetering deflection is reproduced, the SOE is not lost, meanwhile, the alarm direct transmission signal is normally uploaded, and the uploaded SOE time scale is correct.
Experiment seven:
background data: one telemetry violation occurs every 1 millisecond, one thousand per second, without simulating background telemetry.
Actual motion signal: line measurement and control opening-in 1 and public measurement and control opening-in 32 displacement
The experimental process comprises the following steps: continuously transmitting the background data until the experiment is finished; the actual motion signal changes every two seconds for a total of 10 times (20 seconds).
The experimental results are as follows: no loss of SOE occurred in 5 replicates.
And (4) experimental conclusion: in the case of an out-of-limit of 1000 telemetry per second, the field phenomenon is not reproduced.
In combination with the above experiments, the following conclusions can be drawn:
(1) the protected alarm direct transmission does not influence the uploading of the SOE, and the uploading and scheduling of the SOE are normal.
(2) In experiment 5 of the actual signal activity, the loss of SOE was reproduced at 800 telemetry data refreshes per second and an average of 326 telemetry changes per second and the data throughput of SOE, but the field data volume was far from this amount. The CSC-1321 does not lose signal at normal and fault flow rates in the field, even at typical avalanche test flow rates.
(3) Tests have verified that both possible directions of problems with localization prove to be without problems.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (6)
1. A method for testing loss of SOE signals after line faults of an intelligent substation is characterized by comprising the following steps:
(1) building a test system, wherein the test system comprises a telecontrol device, 2 measurement and control devices, a test and protection device, a background data simulation device, a background simulation monitoring device and a master scheduling simulation device;
(2) connecting the line measurement and control input and the public measurement and control input in parallel, simulating the generation of the line measurement and control input, setting first background data, continuously sending the first background data to the end, and testing an SOE signal;
(3) on the basis of the step (2), the measurement and control device is used for enabling the measurement and protection device to actually send protection start, first background data is set, the first background data is continuously sent to the end, and SOE signals are tested;
(4) setting second background data on the basis of the step (3), and continuously sending the second background data to the end to test the SOE signal;
(5) setting third background data on the basis of the step (3), wherein the third background data are continuously sent to the end of the SOE signal test;
(6) connecting 2 measurement and control devices in parallel with 98 switches, simulating protection action to trigger warning direct transmission, setting fourth background data, continuously transmitting the fourth background data to the end, and testing SOE signals;
(7) the simulation device is used for reproducing the information simulation occurrence message of the monitoring record fault moment, setting fourth background data, and continuously sending the fourth background data to the end to test the SOE signal;
(8) and line measurement and control opening and public measurement and control opening and changing positions, setting fifth background data, and continuously sending the fifth background data to the end to test the SOE signal.
2. The method for testing the loss of the SOE signal after the line fault of the intelligent substation is carried out according to claim 1, wherein the first background data is that the change remote measurement is carried out once every 10ms, the number of the remote measurement points is 8, and the background remote measurement is carried out once every 500 ms for 96.
3. The method for testing the loss of the SOE signal after the line fault of the intelligent substation is carried out according to claim 1, wherein the second background data is that the change remote measurement is carried out once every 10ms, the number of the remote measurement points is 8, and the background remote measurement is carried out once every 500 ms and 144.
4. The method for testing the loss of the SOE signal after the line fault of the intelligent substation is carried out according to claim 1, wherein the third background data is that the change remote measurement is carried out once every 10ms, the number of the remote measurement points is 8, and the background remote measurement is carried out once every 500 ms and 192.
5. The method for testing the loss of the SOE signal after the line fault of the intelligent substation of claim 1, wherein the fourth background data is that the change remote measurement is performed every 10ms, and the number of the remote measurement points is 8.
6. The method for testing the loss of the SOE signal after the line fault of the intelligent substation of claim 1, wherein the SOE signal is tested for a plurality of times in the steps (2) to (8).
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