CN108535568B - Anti-radio frequency interference capability test method and integrated automation system tester - Google Patents
Anti-radio frequency interference capability test method and integrated automation system tester Download PDFInfo
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Abstract
The application discloses a radio frequency interference resistance testing method and a comprehensive system tester, wherein the radio frequency interference resistance of a measurement and control device of a comprehensive system is judged by comparing and analyzing the response voltage/current of a voltage/current channel under the condition of no interference signal and analyzing the influence of the interference signal on the response voltage/current generated by the voltage/current channel. Meanwhile, in the method for testing the radio frequency interference resistance, the measured data can also be used for calculating the telemetering precision of the integrated automation system, so that the method for testing the radio frequency interference resistance can simultaneously complete the test of two performances of the integrated automation system, and save time and measurement cost.
Description
Technical Field
The application relates to the technical field of substation automation system detection, in particular to a radio frequency interference resistance testing method and a comprehensive automation system tester.
Background
An integrated automation system (hereinafter referred to as an integrated automation system) is a device for monitoring, measuring, controlling and coordinating the operation conditions of all devices in a substation. In order to ensure that various functions and characteristics of the integrated automation system meet the requirements of design or relevant regulations, before and during the use of the integrated automation system, an integrated automation system tester (hereinafter referred to as an integrated automation system tester) is used for acceptance, detection or debugging. Currently, the test items of the integrated automation system by the integrated automation system tester include a telemetry test, a remote control test, a remote signaling test, a synchronization test and the like, for example, the telemetry test refers to the accuracy of the integrated automation system tester for detecting the receiving of a telemetry signal by a measurement and control device in the integrated automation system.
In an actual working site, a plurality of high-frequency electromagnetic waves exist, and the electromagnetic waves act on sensitive equipment of the integrated system in a space radiation mode to cause the measurement and control signals of the measurement and control device to jump and even cause the misoperation of a protection loop in the measurement and control device, so that the radio frequency interference resistance of the measurement and control device plays a crucial role in the safe operation of a power station.
However, the existing integrated automation system tester cannot test the radio frequency interference resistance of the measurement and control device. At present, the radio frequency interference resistance of the test and control device needs to be tested by external equipment, such as a walkie-talkie, by using electromagnetic waves generated by the walkie-talkie as interference signals. However, in the method, other external equipment is needed to be borrowed in the test process, so that the test cost is increased; in addition, the measurement accuracy of the method is poor, and the reason is that electromagnetic waves entering wireless communication equipment through a direct coupling or indirect coupling mode exist in a test site, and the electromagnetic waves affect the frequency of electromagnetic waves generated by the walkie-talkie, so that an interference signal generated by the walkie-talkie is unstable, and a test result is further affected. In addition, the testing method often requires two workers to complete the testing, and therefore, the labor input cost is high.
Disclosure of Invention
The application provides a method for testing radio frequency interference resistance and an integrated automation system tester, which aim to solve the problem that the existing integrated automation system tester cannot test the radio frequency interference resistance.
In a first aspect, the present application provides a method for testing radio frequency interference resistance, including:
the interference signal is closed, and a plurality of groups of test voltages U with different voltage values are sequentially applied to the voltage channel of the measurement and control device to be testediAnd recording each test voltage UiUndisturbed response voltage V generated by corresponding voltage channeliWherein i is 1, 2, 3 …;
according to the preset standard response voltage E and the undisturbed response voltage ViJudging whether the voltage channel is normal or not;
if the voltage channel fails, stopping the radio frequency interference resistance test;
if the voltage channel is normal, continuing the radio frequency interference resistance test;
starting interference signals, and sequentially applying a plurality of groups of test voltages U with different voltage values to a voltage channel of the measurement and control deviceiThe test voltage UiAnd a test voltage U applied to the voltage channel when the interference signal is turned offiSame, record each test voltage UiDisturbance response voltage V 'generated by corresponding voltage channel'iWherein i is 1, 2, 3 …;
according to undisturbed response voltage ViAnd interference response voltage V'iCalculating the maximum voltage difference value DeltaVmax；
According to the maximum voltage difference value delta VmaxJudging the radio frequency interference resistance of the voltage channel;
if the maximum voltage difference is Δ VmaxIf the preset allowable deviation e is exceeded, judging that the radio frequency interference resistance of the voltage channel is unqualified;
if the maximum voltage difference is Δ VmaxIf the radio frequency interference resistance of the voltage channel is not higher than the preset tolerance e, judging that the radio frequency interference resistance of the voltage channel is qualified;
judging whether the radio frequency interference resistance of the current channel of the measurement and control device is qualified or not by adopting the same method;
and if the radio frequency interference resistance of the voltage channel and the current channel is qualified, judging that the radio frequency interference resistance of the measurement and control device is qualified.
Preferably, the standard response voltage E and the undisturbed response voltage V are usediJudging whether the voltage channel is normal or not, specifically comprising,
according to the standard response voltage E and the undisturbed response voltage ViCalculating the relative error S of undisturbed voltageV；
Judging undisturbed voltage relative error SVExceeds a predetermined tolerance S0；
If there is no disturbance voltage relative error SVExceeds a predetermined tolerance S0Judging that the voltage channel has a fault;
if there is no disturbance voltage relative error SVAllowable composite error S of measuring system not exceeding preset0Then continuing the anti-radio frequency interference capability test.
Preferably, said maximum voltage difference Δ VmaxIs calculated as Δ Vmax＝max{|V′i-Vi|}。
Preferably, the plurality of groups of test voltages U with different voltage valuesiComprises 0, 20% U0、40％U0、60％U0、80％U0、100％U0、120％U0Wherein U is0Is a preset rated voltage.
Preferably, the same method is adopted to determine whether the radio frequency interference resistance of the current channel of the measurement and control device is qualified, specifically including,
the interference signal is closed, and a plurality of groups of test currents J with different current values are sequentially applied to the current channel of the measurement and control deviceiAnd recording each test current JiUndisturbed response current I generated by corresponding current channeliWherein i is 1, 2, 3 …;
according to a preset standard response current A and an undisturbed response current IiJudging whether the current channel is normal or not;
if the current channel fails, stopping the radio frequency interference resistance test;
if the current channel is normal, continuing the radio frequency interference resistance test;
starting interference signals, and sequentially applying a plurality of groups of test currents J with different current values to the current channel of the measurement and control deviceiThe test current JiAnd a test current J applied to the current-voltage path when the interference signal is turned offiIdentical and recording each test current JiDisturbance response current I 'generated by corresponding current channel'iWherein i is 1, 2, 3 …;
according to undisturbed response current IiAnd interference response current I'iCalculating the maximum current difference DeltaImax；
According to the maximum current difference Delta ImaxJudging the radio frequency interference resistance of current electrification;
if the maximum current difference Δ ImaxIf the preset allowable deviation e is exceeded, judging that the radio frequency interference resistance of the current channel is unqualified;
if the maximum current difference Δ ImaxAnd if the preset tolerance e is not exceeded, judging that the radio frequency interference resistance of the current channel is qualified.
Preferably, the plurality of sets of test currents J with different current valuesiComprises 0, 20% of I0、40％I0、60％I0、80％I0、100％I0、120％I0In which I0Is a preset rated current.
In a second aspect, the present application further provides a comprehensive automatic system tester, which comprises a main control module, and a power source module, an interference source module, a data receiving module, a fault determining module and an extreme value calculating module all connected to the main control module,
the main control module is used for coordinating and controlling the operation of each module;
the power source module is used for generating corresponding test voltage/current;
the interference source module is used for turning on or turning off an interference signal;
the data receiving module is used for receiving undisturbed response voltage/current or disturbed response voltage/current generated by the voltage/current channel;
the fault judging module judges whether the corresponding voltage/current channel has a fault or not according to the undisturbed response voltage/current;
the output end of the extreme value calculation module is connected with the anti-interference judgment module, and the extreme value calculation module is used for calculating the maximum voltage/current difference value according to the undisturbed response voltage/current or the interference response voltage/current;
and the anti-interference judging module judges whether the anti-radio frequency interference capability of the voltage/current channel is qualified or not according to the maximum voltage/current difference value.
Preferably, said maximum voltage difference Δ VmaxIs calculated as Δ Vmax＝max{|V′i-ViL, wherein ViIs a non-disturbing response voltage, V'iIs a disturbance response voltage; the maximum current difference Δ ImaxIs calculated as Δ Imax＝max{|′i-IiL wherein IiIs a non-disturbing response current, I'iTo disturb the response current.
Preferably, the fault judgment module (5) comprises a maximum difference value calculation submodule, and the maximum difference value calculation module is used for calculating the maximum difference value according to a preset standard response voltage E and an undisturbed response voltage ViCalculating the relative error S of undisturbed voltageVOr according to a predetermined standard response current A and an undisturbed response current IiCalculating the relative error S of undisturbed currentI。
Preferably, the test voltage generated by the power source module (2) comprises 0, 20% U0、40％U0、60％U0、80％U0、100％U0、120％U0Wherein U is0Is a preset rated voltage; the test current generated by the power source module (2) comprises 0 and 20 percent I0、40％I0、60％I0、80％I0、100％I0、120％I0In which I0Is a preset rated current.
The application provides a radio frequency interference resistance testing method and a comprehensive system tester, which analyze the influence of an interference signal on a voltage/current channel by comparing and analyzing the response voltage/current of the voltage/current channel under the condition of no interference signal and interference signal, thereby judging the radio frequency interference resistance of a measurement and control device of a comprehensive system.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart of a method for testing radio frequency interference resistance according to the present application;
FIG. 2 is a flowchart illustrating steps for determining whether a voltage channel is normal;
FIG. 3 is a schematic structural diagram of the integrated automation system tester of the present application;
the reference numerals in fig. 1-3 refer to: the system comprises a main control module, a 2-power source module, a 3-interference source module, a 4-data receiving module, a 5-fault judgment module, a 6-extreme value calculation module and a 7-anti-interference judgment module.
Detailed Description
Fig. 1 is a flowchart of an embodiment of a method for testing radio frequency interference resistance according to the present application, and as shown in fig. 1, the method for testing radio frequency interference resistance includes:
step S100, the interference signal is closed.
Under the condition that the interference signal is not started, the integrated system operates and works in the environment without or with little interference of high-frequency electromagnetic waves.
Step S200, a plurality of groups of test voltages U with different voltage values are sequentially applied to a voltage channel of the measurement and control device to be testediAnd recording each test voltage UiUndisturbed response electricity generated by corresponding voltage channelPressure ViWherein i is 1, 2, 3 ….
In the present application, a plurality of groups of test voltages U with different voltage valuesiComprises 0, 20% U0、40％U0、60％U0、80％U0、100％U0、120％U0. Wherein, U0Is a preset rated voltage. Of course, workers in the field adjust the test voltage U according to actual needsiAll of which are within the scope of the present application.
Step S300, according to the preset standard response voltage E and the undisturbed response voltage ViJudging whether the voltage channel is normal or not, and if the voltage channel fails, stopping the radio frequency interference resistance test; if the voltage channel is normal, continuing the anti-radio frequency interference capability test.
The standard response voltage E is illustrated here, and is: under the condition that the voltage channel normally operates, rated voltage U is applied to the voltage channel0The voltage channel produces a response voltage.
FIG. 2 is a flowchart of the steps for determining whether the voltage channel is normal, as shown in FIG. 2, according to the standard response voltage E and the undisturbed response voltage ViJudging whether the voltage channel is normal or not, specifically comprising,
step S310, according to the standard response voltage E and the undisturbed response voltage ViCalculating the relative error S of undisturbed voltageV。
In this embodiment, the maximum relative error S is calculatedVThe formula of (1) is:
The person skilled in the art can select a suitable maximum relative error S for calculation according to actual needsVAll of which are within the scope of the present application.
Step S320, judging the relative error S of undisturbed voltageVExceeds a predetermined tolerance S0。
Step S321, if there is no disturbance voltage relative error SVExceeds a predetermined tolerance S0Then the voltage channel is determined to be faulty.
If there is no disturbance voltage relative error SVExceeds a predetermined tolerance S0The response voltage generated by the voltage channel is greatly deviated from the standard response voltage E under the condition that the radio frequency interference signal is not turned on, and the standard response voltage E is the response voltage generated under the condition that the voltage channel normally operates, so that the voltage channel can be determined to be in the abnormal operating state, namely the voltage channel is determined to be in the fault state. Once the voltage channel is judged to have a fault, the radio frequency interference resistance test is terminated, and at the moment, the possible fault of the voltage channel should be timely checked and repaired.
Step S322, if there is no disturbance voltage relative error SVAllowable composite error S of measuring system not exceeding preset0Then continuing the anti-radio frequency interference capability test.
If there is no disturbance voltage relative error SVDoes not exceed a preset tolerance S0If the voltage channel is in the normal working state, the voltage channel is judged to be in the normal working state, and at the moment, the voltage channel can be continuously subjected to the anti-radio frequency interference capability test.
Step S400, turning on the interference signal.
Under the condition of turning on the interference signal, the integrated automation system operates in an environment with a large amount of high-frequency electromagnetic wave interference so as to simulate the actual working site of the integrated automation system.
Step S500, a plurality of groups of test voltages U with different voltage values are sequentially applied to the voltage channel of the measurement and control deviceiThe test voltage UiAnd a test voltage U applied to the voltage channel when the interference signal is turned offiSame, record each test voltage UiDisturbance response voltage V 'generated by corresponding voltage channel'iWherein i is 1, 2,3…。
It should be noted that, in this step, a plurality of sets of test voltages U with different voltage values are applied to the voltage channelsiTest voltage U different from the plurality of sets of voltage values applied to the voltage channels in step S200iThe same is true. For example, in step S200, a plurality of sets of test voltages U with different voltage values are applied to the voltage channelsi0, 20% U in sequence0、40％U0、60％U0、80％U0、100％U0、120％U0Then, in step S500, a plurality of sets of test voltages U with different voltage values are applied to the voltage channelsiAlso 0, 20% U in sequence0、40％U0、60％U0、80％U0、100％U0、120％U0Wherein U is0Is a preset rated voltage. Of course, if the test voltage U is applied to the voltage channel in step S200iIf the adjustment occurs, the test voltage U applied to the voltage channel in step S500iCorresponding adjustments also occur.
Step S600, according to the undisturbed response voltage ViAnd interference response voltage V'iCalculating the maximum voltage difference value DeltaVmax。
In this embodiment, the maximum voltage difference Δ VmaxIs calculated as Δ Vmax＝max{|V′i-Vi|}。
Step S700, according to the maximum voltage difference value delta VmaxAnd judging whether the radio frequency interference resistance of the voltage channel is qualified or not.
If the maximum voltage difference is Δ VmaxIf the preset allowable deviation e is exceeded, judging that the radio frequency interference resistance of the voltage channel is unqualified; if the maximum voltage difference is Δ VmaxAnd if the preset tolerance e is not exceeded, judging that the radio frequency interference resistance of the voltage channel is qualified.
In the present application, the maximum voltage difference Δ V calculated in the step S600 is determinedmaxAnd judging whether the radio frequency interference resistance of the voltage channel is qualified or not if the preset tolerance e is exceeded. The preset tolerance e is explained, and the preset tolerance e is the indication value of the voltage channel when the voltage channel normally worksThe maximum range value of the variation, i.e. the maximum allowable system error. If the maximum voltage difference is Δ VmaxIf the predetermined tolerance e is exceeded, the maximum voltage difference Δ V is determinedmaxThe part exceeding the tolerance e is caused by the influence of the interference signal, and therefore, the influence of the interference signal on the voltage channel is determined to be large, that is, the radio frequency interference resistance of the voltage channel is not qualified. If the maximum voltage difference is Δ VmaxIf the preset tolerance e is not exceeded, it can be determined that the influence of the interference signal on the voltage channel is small, i.e., the anti-radio frequency interference capability of the voltage channel is qualified.
And step S800, judging whether the radio frequency interference resistance of the current channel of the measurement and control device is qualified or not by adopting the same method.
In the application, the determination of the qualification of the radio frequency interference resistance of the current channel of the measurement and control device specifically comprises,
the interference signal is closed, and a plurality of groups of test currents J with different current values are sequentially applied to the current channel of the measurement and control deviceiAnd recording each test current JiUndisturbed response current I generated by corresponding current channeliWherein i is 1, 2, 3 …;
in this embodiment, a plurality of sets of test currents J having different current valuesiComprises 0, 20% of I0、40％I0、60％I0、80％I0、100％I0、120％I0In which I0Is a preset rated current.
According to a preset standard response current A and an undisturbed response current IiJudging whether the current channel is normal or not;
if the current channel fails, stopping the radio frequency interference resistance test;
if the current channel is normal, continuing the radio frequency interference resistance test;
starting interference signals, and sequentially applying a plurality of groups of test currents J with different current values to the current channel of the measurement and control deviceiThe test current JiAnd a test current J applied to the current-voltage path when the interference signal is turned offiIdentical and recording each test current JiCorresponding current channelGenerated disturbance response current I'iWherein i is 1, 2, 3 …;
according to undisturbed response current IiAnd interference response current I'iCalculating the maximum current difference DeltaImax；
According to the maximum current difference Delta ImaxJudging the radio frequency interference resistance of current electrification;
if the maximum current difference Δ ImaxIf the preset allowable deviation e is exceeded, judging that the radio frequency interference resistance of the current channel is unqualified;
if the maximum current difference Δ ImaxAnd if the preset tolerance e is not exceeded, judging that the radio frequency interference resistance of the current channel is qualified.
The specific process of determining whether the radio frequency interference resistance of the current channel is qualified is similar to the process of determining whether the radio frequency interference resistance of the voltage channel is qualified, and therefore, the detailed description is omitted here.
And S900, if the radio frequency interference resistance of the voltage channel and the current channel is qualified, judging that the radio frequency interference resistance of the measurement and control device is qualified.
The following describes a specific implementation process of the method for testing radio frequency interference resistance according to the present application by using a specific example.
Step S100, the interference signal is closed.
Step S200, under the condition of closing the interference signal, sequentially applying a test voltage U to a voltage channel of the measurement and control device to be testedi：0、20％U0、40％U0、60％U0、80％U0、100％U0、120％U0Wherein a predetermined rated voltage U0＝100kV。
TABLE 1 for each test voltage UiCorresponding undisturbed response voltage ViAs shown in Table 1, in this example, the detected undisturbed response voltage comprises an undisturbed response line voltage Va、Vb、VcAnd a non-disturbance response phase voltage Vab、Vbc、Vca。
TABLE 1
Step S300, according to the detected undisturbed response voltage ViCalculating relative error S of undisturbed voltage with standard response voltage EV. In this example, the standard response voltage E is 35 kV.
Step S310, calculating each undisturbed response voltage ViRelative error with the standard response voltage E, and taking the relative error with the maximum value as the maximum relative error SV。
Wherein, the calculation formula of the relative error between the undisturbed response line voltage and the standard response voltage is
For example, when the test voltage is 20% U0When 20% × 100 ═ 20kV, undisturbed response line voltage UaThe calculation process of the relative error with the standard response voltage is as follows:
the relative error between the undisturbed response phase voltage and the standard response voltage is calculated by the formula
For example, when the test voltage is 60% U0When 60% × 100 ═ 60kV, the undisturbed response phase voltage U is set to the phase voltage UbcThe calculation process of the relative error with the standard response voltage is as follows:
calculating each undisturbed response voltage ViSelecting the maximum relative error S as the relative error with the maximum value of the standard response voltage EV. In this example, the maximum phase is calculatedFor error SVWas 0.08.
Step S320, judging the maximum relative error S calculated in the previous stepVWhether the error exceeds the preset tolerance S0And then determine whether the voltage channel is normal.
In this example, the maximum relative error SV0.08, preset tolerance S0When the error is equal to 0.2, the maximum relative error S is known by comparisonV＝0.08<Tolerance error S0Therefore, the voltage channel can be determined to be normal, and at this time, the anti-rfi test of the voltage channel will be continued.
Step S400, turning on the interference signal.
Step S500, in the presence of interference signals, sequentially applying a test voltage U to a voltage channel of the measurement and control device to be testedi：0、20％U0、40％U0、60％U0、80％U0、100％U0、120％U0Wherein a predetermined rated voltage U0＝100kV。
TABLE 2 for each test voltage UiCorresponding disturbance response voltage ViAs shown in Table 2, in this example, the sensed jammer response voltage includes a jammer response line voltage V'a、V′b、V′cAnd interference response phase voltage V'ab、V′bc、V′ca。
TABLE 2
Step S600, according to the undisturbed response voltage ViAnd interference response voltage V'iCalculating the maximum voltage difference value DeltaVmaxWherein the maximum voltage difference Δ VmaxIs max { | V'i-Vi|}。
For example, when the test voltage is 40% U0When 40% × 100 ═ 40kV, undisturbed response line voltage UbAnd interference response line voltage U'bVoltage difference Δ V therebetweeni＝|V′i-Vi|＝|8.08-8.07|＝0.01。
As another example, when the test voltage is 120% U0When 120% × 100 ═ 120kV, the undisturbed response phase voltage U responds to the phase voltage UcaAnd interference response line voltage U'caVoltage difference Δ V therebetweeni＝|V′i-Vi|＝|42.04-42|＝0.04。
Calculating each undisturbed response voltage ViAnd the corresponding interference response line voltage V'iThe maximum voltage difference Δ V is selected as the maximum voltage difference between the twomax. Calculated, in this example, the maximum voltage difference Δ VmaxWas 0.07.
Step S700, according to the maximum voltage difference value delta VmaxAnd judging whether the radio frequency interference resistance of the voltage channel is qualified or not.
According to the maximum voltage difference value delta VmaxJudging whether the radio frequency interference resistance of the voltage channel is qualified or not, namely judging the maximum voltage difference value delta VmaxWhether the preset tolerance e is exceeded. If the maximum voltage difference is Δ VmaxIf the preset allowable deviation e is exceeded, judging that the radio frequency interference resistance of the voltage channel is unqualified; if the maximum voltage difference is Δ VmaxIf the radio frequency interference resistance of the voltage channel is not higher than the preset tolerance e, judging that the radio frequency interference resistance of the voltage channel is qualified;
in this example, the preset tolerance e is 0.2, and the maximum voltage difference Δ V is known by comparisonmax＝0.07<The tolerance e is 0.2, so that the radio frequency interference resistance of the voltage channel can be judged to be qualified.
Step S800, determining whether the radio frequency interference resistance of the current channel of the measurement and control device is qualified by using the same method, which will not be described herein again.
And S900, if the radio frequency interference resistance of the voltage channel and the current channel is qualified, judging that the radio frequency interference resistance of the measurement and control device is qualified.
The application also provides a comprehensive automatic system tester, which comprises a main control module 1, and a power source module 2, an interference source module 3, a data receiving module 4, a fault judgment module 5 and an extreme value calculation module 6 which are all connected with the main control module 1, wherein the main control module 1 is used for coordinating and controlling the operation of each module.
The output end of the power source module 2 is connected with the voltage/current channel, and the power source module 2 generates corresponding test voltage/current according to the control signal of the main control module 1 and applies the generated test voltage/current to the voltage/current channel. In the present application, the test voltage generated by the power source module 2 includes 0, 20% U0、40％U0、60％U0、80％U0、100％U0、120％U0Wherein U is0Is a preset rated voltage; the test current generated by the power source module 2 comprises 0 and 20 percent I0、40％I0、60％I0、80％I0、100％I0、120％I0In which I0Is a preset rated current.
The interference source module 3 is used to turn on or off the interference signal. When the interference signal closing device is used specifically, when an interference signal closing instruction of the main control module 1 is received, the interference signal is stopped being sent to the environment; and when an interference signal starting instruction of the main control module 1 is received, sending an interference signal to the environment.
The input end of the data receiving module 4 is connected with the voltage/current channel and is used for receiving undisturbed response voltage/current or disturbed response voltage/current generated by the voltage/current channel.
The fault judgment module 5 judges whether the corresponding voltage/current channel has a fault according to the undisturbed response voltage/current. Of course, the fault determination module 5 may be connected to a fault alarm module, and when the fault determination module 5 determines that the voltage/current channel has a fault, the fault alarm module will generate an alarm to remind a worker to perform corresponding work inspection and maintenance. In this application, the fault determination module 5 includes a maximum difference calculation sub-module, and the maximum difference calculation module is configured to calculate the maximum difference according to a preset standard response voltage E and an undisturbed response voltage ViCalculating the relative error S of undisturbed voltageVOr according to a predetermined standard response current A and an undisturbed response current IiCalculating the relative error S of undisturbed currentI。
The output end of the extreme value calculation module 6 is connected withAnd the extreme value calculating module 6 is connected with the anti-interference judging module 7 and is used for calculating the maximum voltage/current difference value according to the undisturbed response voltage/current or the interference response voltage/current. In the present application, the maximum voltage difference Δ VmaxIs calculated as Δ Vmax＝max{|V′i-ViL, wherein ViIs a non-disturbing response voltage, V'iIs a disturbance response voltage; maximum current difference Δ ImaxIs calculated as Δ Imax＝max{|I′i-IiL wherein IiIs a non-disturbing response current, I'iTo disturb the response current.
And the anti-interference judging module 7 judges whether the radio frequency interference resisting capability of the voltage/current channel is qualified or not according to the maximum voltage/current difference value.
The application provides a radio frequency interference resistance testing method and a comprehensive system tester, which analyze the influence of an interference signal on a voltage/current channel by comparing and analyzing the response voltage/current of the voltage/current channel under the condition of no interference signal and interference signal, thereby judging the radio frequency interference resistance of a measurement and control device of a comprehensive system.
Meanwhile, the data measured in the method for testing the radio frequency interference resistance can also be used for calculating the telemetry precision of the integrated automation system, and the specific calculation process is common knowledge of those skilled in the art and is not described herein again. Therefore, the method for testing the radio frequency interference resistance can simultaneously complete the test of two performances of the integrated system, and saves time and measurement cost.
In addition, many high-frequency electromagnetic waves exist in the actual working site of the integrated system, and the electromagnetic waves act on the integrated system to interfere with various functions and characteristics of the integrated system. In the test environment of the prior integrated system, there is no or only a small amount of high frequency electromagnetic waves. This results in the detection of the integrated automation system, which is not the function and characteristic of the integrated automation system in the normal working state, i.e. the detection result of the original integrated automation system tester for the integrated automation system deviates from the real function and characteristic thereof. The integrated automation system tester can generate interference signals to simulate the actual working environment of the integrated automation system, so that the detection result of the integrated automation system tester on each function and characteristic of the integrated automation system is closer to the function and characteristic shown in the normal working state of the integrated automation system tester.
The above-described embodiments of the present application do not limit the scope of the present application.
Claims (7)
1. A method for testing radio frequency interference resistance is characterized by comprising the following steps:
the interference signal is closed, and a plurality of groups of test voltages U with different voltage values are sequentially applied to the voltage channel of the measurement and control device to be testediAnd recording each test voltage UiUndisturbed response voltage V generated by corresponding voltage channeliWherein i is 1, 2, 3 …;
according to the preset standard response voltage E and the undisturbed response voltage ViJudging whether the voltage channel is normal or not;
if the voltage channel fails, stopping the radio frequency interference resistance test;
if the voltage channel is normal, continuing the radio frequency interference resistance test;
starting interference signals, and sequentially applying a plurality of groups of test voltages U with different voltage values to a voltage channel of the measurement and control deviceiThe test voltage UiAnd a test voltage U applied to the voltage channel when the interference signal is turned offiSame, record each test voltage UiInterference response voltage V generated by corresponding voltage channeli', wherein i ═ 1, 2, 3 …;
according to undisturbed response voltage ViAnd a disturbance response voltage Vi', calculating the maximum voltage difference value DeltaVmax；
According to the maximum voltage difference value delta VmaxJudging the radio frequency interference resistance of the voltage channel;
if the maximum voltage difference is Δ VmaxIf the preset allowable deviation e is exceeded, judging that the radio frequency interference resistance of the voltage channel is unqualified;
if the maximum voltage difference is Δ VmaxIf the radio frequency interference resistance of the voltage channel is not higher than the preset tolerance e, judging that the radio frequency interference resistance of the voltage channel is qualified;
judging whether the radio frequency interference resistance of the current channel of the measurement and control device is qualified or not by adopting the same method;
if the radio frequency interference resistance of the voltage channel and the current channel is qualified, judging that the radio frequency interference resistance of the measurement and control device is qualified;
wherein: according to the standard response voltage E and the undisturbed response voltage ViJudging whether the voltage channel is normal or not, specifically comprising,
according to the standard response voltage E and the undisturbed response voltage ViCalculating the relative error S of undisturbed voltageV，
Or
Wherein U is0Is a preset rated voltage;
judging undisturbed voltage relative error SVExceeds a predetermined tolerance S0；
If there is no disturbance voltage relative error SVExceeds a predetermined tolerance S0Judging that the voltage channel has a fault;
if there is no disturbance voltage relative error SVDoes not exceed a preset tolerance S0Then continuing the anti-radio frequency interference capability test.
2. Test method according to claim 1, characterised in that said maximum voltage difference Δ νmaxIs calculated as Δ Vmax＝max{|Vi′-Vi|}。
3. The method according to claim 1, wherein the plurality of test voltages U having different voltage valuesiComprises 0, 20% U0、40％U0、60％U0、80％U0、100％U0And 120% U0。
4. The test method according to claim 1, wherein the plurality of sets of test currents J having different current valuesiComprises 0, 20% of I0、40％I0、60％I0、80％I0、100％I0And 120% of I0In which I0Is a preset rated current.
5. A comprehensive automatic system tester is characterized by comprising a main control module (1), a power source module (2), an interference source module (3), a data receiving module (4), a fault judgment module (5) and an extreme value calculation module (6) which are all connected with the main control module (1),
the main control module (1) is used for coordinating and controlling the operation of each module;
the power source module (2) is used for generating corresponding test voltage or current;
the interference source module (3) is used for switching on or switching off interference signals;
the data receiving module (4) is used for receiving undisturbed response voltage or current or disturbed response voltage or current generated by the voltage/current channel;
the fault judgment module (5) judges whether the corresponding voltage or current channel has a fault according to the undisturbed response voltage or current;
the output end of the extreme value calculation module (6) is connected with an anti-interference judgment module (7), and the extreme value calculation module (6) is used for calculating the maximum voltage or current difference value according to the undisturbed response voltage or current or the interference response voltage or current;
the anti-interference judging module (7) judges whether the anti-radio frequency interference capability of the voltage or current channel is qualified or not according to the maximum voltage or current difference value;
the fault judgment module (5) comprises a maximum difference value calculation submodule, and the maximum difference value calculation module is used for calculating the maximum difference value according to a preset standard response voltage E and an undisturbed response voltage ViBy passing
Or
Calculating undisturbed voltage relative error SVWherein U is0At a predetermined rated voltage, or according to a predetermined standard response current A and an undisturbed response current IiCalculating the relative error S of undisturbed currentI。
6. The integrated automation system tester of claim 5 wherein the maximum voltage difference Δ VmaxIs calculated as Δ Vmax＝max{|Vi′-ViL, wherein ViFor undisturbed response voltage, Vi' is the disturbance response voltage; the maximum current difference Δ ImaxIs calculated as Δ Imax＝max{|Ii′-IiL wherein IiFor undisturbed response current, Ii' is the disturbance response current.
7. The integrated automation system tester of claim 5, characterised in that the test voltage generated by the power source module (2) comprises 0, 20% U0、40％U0、60％U0、80％U0、100％U0And 120% U0(ii) a The test current generated by the power source module (2) comprises 0 and 20 percent I0、40％I0、60％I0、80％I0、100％I0And 120% of I0In which I0Is a preset rated current.
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