Protection device signal relay test system and method

Abstract

The invention relates to the technical field of power system protection, and discloses a protection device signal relay test system and method. According to the system and the method, a test signal is generated through a signal generation module, a signal input module receives a signal from the signal generation module, records an actual voltage value and an actual current value of an input signal, calculates an effective value and a signal peak value of the input signal and transmits the effective value and the signal peak value to a relay, and a relay test module activates the relay through the input signal. The signal processing and output module records the action time, the holding time and the release time of the relay and calculates the response time, the action time and the misoperation rate of the relay, the signal output module feeds back an output signal of the relay to a system and calculates the ratio of an effective value of the output signal to an input signal, and the data processing and output module gathers data of all the modules. Statistical analysis is carried out, the standard deviation of the test signals is calculated, all signal calculation values are synthesized to generate a signal test report, and the signal test report is output through a display window.

Description

Technical Field

[0001] The present invention relates to the technical field of power system protection, and in particular to a protection device signal relay testing system and method. Background Art

[0002] The protection device signal relay is an electrical component used for power system and equipment protection. Its main function is to monitor electrical parameters such as current, voltage, frequency, etc., and quickly cut off the circuit or sound an alarm when an abnormal situation is detected to prevent equipment damage or safety accidents. The relay can monitor the operating status of the electrical system in real time, detect faults such as short circuit, overload, ground fault, etc. in time, and take corresponding measures to deal with them.

[0003] At present, many relay tests mainly rely on traditional manual testing methods, such as using multimeters, oscilloscopes and other tools for detection. These methods are often time-consuming and easily affected by human factors, resulting in inaccurate test results. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides a protection device signal relay testing system and method, which are provided with a signal generating module to generate a test signal, a signal input module to receive a signal from the signal generating module, record an actual voltage value and an actual current value of the input signal, calculate an effective value Xhyx and a signal peak value Xhfz of the input signal, and transmit the signal to a relay, a relay testing module to activate the relay through an input signal, record an action time, a holding time and a release time of the relay, calculate a response time Xysj, an action time Dzsj and a false operation rate Wdzl of the relay, and monitor its response, a signal output module to feed back an output signal of the relay to a system, record parameters of the output signal, calculate a ratio Srbl of the effective value Scyx of the output signal to the input signal, and send the above data to a data processing and output module, the data processing and output module to aggregate data of all modules, perform statistical analysis, calculate a standard deviation Bcxh of the test signal, comprehensively calculate values ​​of all the above signals to generate a signal test report and output it through a display window, calculate relevant parameters of the input signal through a data analysis method, and generate an accurate signal test report based on the calculated values, thereby avoiding the problems of long test time and inaccurate test results caused by manual testing, and solving the above problems.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solutions: a protection device signal relay test system, comprising a signal generation module, a signal input module, a relay test module, a signal output module and a data processing and output module;

[0008] The signal generation module generates a test signal, including current, voltage and frequency, and records the generated signal parameters, including amplitude, frequency and waveform;

[0009] The signal input module receives the signal from the signal generation module, records the actual voltage value and the actual current value of the input signal, calculates the effective value Xhyx and the signal peak value Xhfz of the input signal, and transmits the calculated effective value and signal peak value of the input signal to the relay;

[0010] The relay test module activates the relay through an input signal, records the action time, hold time and release time of the relay, calculates the response time Xysj, action time Dzsj and malfunction rate Wdzl of the relay, and monitors its response;

[0011] The signal output module feeds back the output signal of the relay to the system, records the parameters of the output signal, calculates the ratio Srbl of the effective value Scyx of the output signal to the input signal, and sends the above data to the data processing and output module;

[0012] The data processing and output module collects the data of all modules, performs statistical analysis, calculates the standard deviation Bcxh of the test signal, generates a signal test report by integrating the above-mentioned calculated values ​​of all signals, and outputs it through a display window.

[0013] Preferably, the signal input module receives the signal from the signal generation module, records the actual voltage value and the actual current value of the input signal, and calculates the effective value Xhyx of the input signal. The calculation formula is as follows:

[0014]

[0015] In the formula, Xhyx represents the effective value of the input signal, T represents the period of the signal, x(t) represents the instantaneous value of the signal x at time t, and dt represents the integral sign.

[0016] Preferably, the signal input module receives the signal from the signal generation module, records the actual voltage value and the actual current value of the input signal, and calculates the peak value Xhfz of the input signal. The calculation formula is as follows:

[0017] Xhfz=max|x(t)|

[0018] In the formula, Xhfz represents the peak value of the input signal, |x(t)| represents the absolute value of the signal at time t, where t∈[0,T], and T represents the period of the signal.

[0019] Preferably, the relay test module activates the relay through an input signal, records the action time, hold time and release time of the relay, and calculates the response time Xysj of the relay, and the calculation formula is as follows:

[0020] Xysj=TS action -Ts input

[0021] In the formula, Xysj represents the response time of the relay, TS action Indicates the time when the relay starts to act, Ts input Indicates the time when the input signal is active.

[0022] Preferably, the relay test module activates the relay through an input signal, records the action time, hold time and release time of the relay, and calculates the action time Dzsj of the relay, and the calculation formula is as follows:

[0023] Dzsj=TS switch -Ts input

[0024] In the formula, Dzsj represents the action time of the relay, TS switch Indicates the time it takes for the relay to fully switch to the activated state, Ts input Indicates the time when the input signal is active.

[0025] Preferably, the relay test module activates the relay through an input signal, records the action time, holding time and release time of the relay, and calculates the false operation rate Wdzl of the relay, and the calculation formula is as follows:

[0026]

[0027] In the formula, Wdzl represents the false operation rate of the relay, N false Indicates the number of false actions, N total Indicates the total number of actions.

[0028] Preferably, the signal output module feeds back the output signal of the relay to the system, records the parameters of the output signal, and calculates the effective value Scyx of the output signal. The calculation formula is as follows:

[0029]

[0030] In the formula, Scyx represents the effective value of the output signal, N represents the number of sampling points of the output signal, and yi Represents the value of the i-th output signal sampling point, where i represents the counting subscript.

[0031] Preferably, the signal output module feeds back the output signal of the relay to the system, records the parameters of the output signal, and calculates the ratio Srbl of the input signal. The calculation formula is as follows:

[0032]

[0033] In the formula, Srbl represents the ratio of the input signal, Scyx represents the effective value of the output signal, and Xhyx represents the effective value of the input signal.

[0034] Preferably, the data processing and output module aggregates the data of all modules, performs statistical analysis, and calculates the standard deviation Bcxh of the test signal. The calculation formula is as follows:

[0035]

[0036] In the formula, Bcxh represents the standard deviation of the test signal, M represents the number of samples in the data set, and x i represents the value of the i-th signal sample, and μ represents the mean of the signal data set.

[0037] A method for testing a signal relay of a protection device comprises the following steps:

[0038] S1. Generate a test signal, including current, voltage and frequency, through a signal generation module, and record the generated signal parameters, including amplitude, frequency and waveform;

[0039] S2, the signal input module receives the signal from the signal generation module, records the actual voltage value and the actual current value of the input signal, calculates the effective value Xhyx and the signal peak value Xhfz of the input signal, and transmits the calculated effective value and signal peak value of the input signal to the relay;

[0040] S3, the relay test module activates the relay through the input signal, records the relay's action time, hold time and release time, calculates the relay's response time Xysj, action time Dzsj and false operation rate Wdzl, and monitors its response;

[0041] S4, the signal output module feeds back the output signal of the relay to the system, records the parameters of the output signal, calculates the ratio Srbl of the effective value Scyx of the output signal and the input signal, and sends the above data to the data processing and output module;

[0042] S5. The data processing and output module summarizes the data of all modules, performs statistical analysis, calculates the standard deviation Bcxh of the test signal, and generates a signal test report by integrating the above-mentioned signal calculation values ​​and outputs it through the display window.

[0043] Compared with the prior art, the present invention provides a protection device signal relay testing system and method, which has the following beneficial effects:

[0044] The present invention generates a test signal through a signal generation module, a signal input module receives the signal from the signal generation module, records the actual voltage value and the actual current value of the input signal, calculates the effective value Xhyx and the signal peak value Xhfz of the input signal, and transmits the signal to a relay, a relay test module activates the relay through the input signal, records the action time, the holding time and the release time of the relay, calculates the response time Xysj, the action time Dzsj and the false operation rate Wdzl of the relay, and monitors its response, a signal output module feeds back the output signal of the relay to the system, records the parameters of the output signal, calculates the ratio Srbl of the effective value Scyx of the output signal to the input signal, and sends the above data to a data processing and output module, the data processing and output module summarizes the data of all modules, performs statistical analysis, calculates the standard deviation Bcxh of the test signal, calculates the numerical value of all the above signals, generates a signal test report, and outputs it through a display window, calculates the relevant parameters of the input signal through a data analysis method, generates an accurate signal test report based on the calculated numerical value, and avoids the problems of long test time and inaccurate test results caused by manual testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the system flow of the present invention;

[0046] Figure 2 It is a schematic diagram of the steps of the method of the present invention. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] At present, many relay tests mainly rely on traditional manual testing methods, such as using multimeters, oscilloscopes and other tools for detection. These methods are often time-consuming and easily affected by human factors, resulting in inaccurate test results. Therefore, a protection device signal relay test system is proposed. Figure 1,The system includes a signal generation module, a signal input module, a relay test module, a signal output module and a data processing and output module;

[0049] The signal generation module can generate DC and AC current signals. The DC current signal is used to test the DC characteristics of the equipment, and the AC current signal is used to simulate the AC current conditions in the actual working environment. The amplitude of the current signal can be adjusted according to the test requirements to meet the test requirements of different equipment. The generated signals are uniformly sent to the signal input module;

[0050] The signal input module receives the signal from the signal generation module, records the actual voltage value and actual current value of the input signal, and calculates the effective value Xhyx and signal peak value Xhfz of the input signal, where:

[0051] The formula for calculating the effective value of the input signal is as follows:

[0052]

[0053] The calculation of effective value is crucial for the calibration of protection devices. Many protection devices such as overcurrent protection and overvoltage protection are set based on the effective value of the input signal. By accurately calculating the effective value of the input signal, it is possible to ensure that the setting value of the protection device is reasonable, thereby improving the safety and reliability of the system. In the formula, Xhyx represents the effective value of the input signal, T represents the period of the signal, and x(t) represents the instantaneous value of the signal x at time t. At the same time, in the signal relay test, the effective value of the input signal can be used for fault detection and diagnosis. When the effective value of the input signal is abnormal, it may indicate that there is a fault or abnormality in the system. By monitoring the changes in the effective value, engineers can promptly discover and deal with potential problems to avoid equipment damage or system failure.

[0054] The formula for calculating the input signal peak value is as follows:

[0055] Xhfz=max|x(t)|

[0056] The calculation of the peak value is very important for evaluating the transient characteristics of the signal. In the power system, transient signals such as surges and impacts may cause damage to the equipment. By analyzing the peak value, engineers can determine the transient characteristics of the signal and take corresponding protection measures. In the formula, Xhfz represents the peak value of the input signal, |x(t)| represents the absolute value of the signal at time t, where t∈[0,T], T represents the period of the signal. Under different load conditions, the peak value of the input signal may be different. By calculating the peak value, the protection device can be dynamically adjusted according to the actual load conditions to ensure effective protection under various working conditions.

[0057] The relay test module activates the relay through the input signal, records the relay's action time, hold time and release time, and calculates the relay's response time Xysj, action time Dzsj and false operation rate Wdzl, where:

[0058] The formula for calculating the response time of the relay is as follows:

[0059] Xysj=TS action -Ts input

[0060] In protection devices, relays are usually used to monitor and control the safety of circuits. A shorter response time means that the relay can detect abnormal conditions more quickly and take corresponding measures, thereby reducing potential safety hazards. In the formula, Xysj represents the response time of the relay, and TS action Indicates the time when the relay starts to act, Ts input Indicates the time when the input signal is activated. By monitoring and recording the response time of the relay, its reliability under different working environments and conditions can be analyzed. This analysis can help identify the performance bottleneck of the relay under specific conditions, and then optimize and improve it to improve the reliability of the entire test system;

[0061] The calculation formula of the relay action time is as follows:

[0062] Dzsj=TS switch -Ts input

[0063] The action time of the relay directly affects the safety of the protection system. A shorter action time means that the relay can respond to fault signals faster, thereby reducing the risk of equipment damage and safety accidents. In the formula, Dzsj represents the action time of the relay, TS switch Indicates the time it takes for the relay to fully switch to the activated state, Ts input Indicates the time when the input signal is activated. Regular testing and recording of the action time helps to find performance problems of the relay under specific conditions, so as to make necessary maintenance and adjustments to ensure its long-term reliable operation;

[0064] The formula for calculating the false operation rate of the relay is as follows:

[0065]

[0066] The false operation rate is one of the important indicators to measure the performance of relays. By calculating the false operation rate, the reliability and stability of the relay under actual working conditions can be evaluated to ensure that it can respond accurately in the event of a fault. In the formula, Wdzl represents the false operation rate of the relay, N false Indicates the number of false actions, N total Indicates the total number of actions;

[0067] The signal output module feeds back the output signal of the relay to the control system in real time through the interface. This feedback mechanism ensures that the system can obtain the working status of the relay in time, and then perform corresponding control and adjustment. At the same time, the parameters of the output signal will be recorded in real time. The recording of these parameters not only helps to monitor the performance of the relay, but also provides basic data for subsequent data analysis and fault diagnosis. The ratio of the calculated output signal effective value Scyx to the input signal Srbl is used as one of the analysis indicators of the signal test;

[0068] The formula for calculating the effective value of the output signal is as follows:

[0069]

[0070] The effective value calculation can provide the real strength information of the output signal. In the protection device, the strength of the signal directly affects the action of the relay and the effectiveness of the protection function. By calculating the effective value, the tester can accurately evaluate the output signal strength of the relay under different working conditions to ensure that it can meet the requirements of the system. In the formula, Scyx represents the effective value of the output signal, N represents the number of sampling points of the output signal, and y i Represents the value of the i-th output signal sampling point. Through the monitoring and analysis of the effective value, the system can timely identify potential risks and faults. In the protection device, the timely feedback and response mechanism can effectively prevent equipment damage and safety accidents.

[0071] The ratio of the input signal is calculated as follows:

[0072]

[0073] The ratio of input signals can be used to evaluate the performance of relays. By comparing the ratio of input signals to output signals, testers can determine the responsiveness and accuracy of relays under different working conditions. The change of this ratio can reflect the working status of the relay and help identify whether it is working properly. In the formula, Srbl represents the ratio of input signals, Scyx represents the effective value of the output signal, and Xhyx represents the effective value of the input signal. The calculation of the input signal ratio provides a basis for subsequent data analysis. By comparing historical data and real-time data, the system can identify trends and patterns and provide decision support for operators.

[0074] The data processing and output module collects the data of all modules, performs statistical analysis, and calculates the standard deviation Bcxh of the test signal. The calculation formula is as follows:

[0075]

[0076] Standard deviation is an important indicator to measure data volatility. In the signal relay test of the protection device, the stability of the signal can be evaluated by calculating the standard deviation of the test signal. A smaller standard deviation indicates that the signal fluctuates less within a certain range, and the relay response is more reliable and can work stably under predetermined conditions. In the formula, Bcxh represents the standard deviation of the test signal, M represents the number of samples in the data set, and x i represents the value of the i-th signal sample, and μ represents the mean of the signal data set. By detecting the standard deviation, testers can promptly identify potential problems and take necessary maintenance measures to ensure the normal operation of the protection device;

[0077] After the data is aggregated, the module will perform statistical analysis on the collected data. The main purpose of statistical analysis is to identify the distribution characteristics and change trends of the data. After completing the statistical analysis, the data processing and output module will integrate the calculation results of all the above signals to generate a signal test report. The report includes a test overview and data summary. It uses line graphs, bar graphs, and pie charts to intuitively display the change trends and distribution characteristics of the signals, helping users to quickly understand the data. At the same time, based on the analysis results, it provides evaluation of signal quality and improvement suggestions.

[0078] See also Figure 2 , a protection device signal relay testing method, comprising the following steps:

[0079] S1. Generate a test signal, including current, voltage and frequency, through a signal generation module, and record the generated signal parameters, including amplitude, frequency and waveform;

[0080] S2, the signal input module receives the signal from the signal generation module, records the actual voltage value and the actual current value of the input signal, calculates the effective value Xhyx and the signal peak value Xhfz of the input signal, and transmits the calculated effective value and signal peak value of the input signal to the relay;

[0081] S3, the relay test module activates the relay through the input signal, records the relay's action time, hold time and release time, calculates the relay's response time Xysj, action time Dzsj and false operation rate Wdzl, and monitors its response;

[0082] S4, the signal output module feeds back the output signal of the relay to the system, records the parameters of the output signal, calculates the ratio Srbl of the effective value Scyx of the output signal and the input signal, and sends the above data to the data processing and output module;

[0083] S5. The data processing and output module summarizes the data of all modules, performs statistical analysis, calculates the standard deviation Bcxh of the test signal, and generates a signal test report by integrating the above-mentioned signal calculation values ​​and outputs it through the display window.

[0084] Through the combination of the above-mentioned system and method, the relevant parameters of the input signal are calculated using data analysis, and an accurate signal test report is generated based on the calculated values, thus avoiding the problems of time-consuming tests and inaccurate test results caused by manual tests.

[0085] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A protection device signal relay test system, Features: It includes a signal generation module, a signal input module, a relay test module, a signal output module and a data processing and output module; The signal generation module generates a test signal, including current, voltage and frequency, and records the generated signal parameters, including amplitude, frequency and waveform; The signal input module receives the signal from the signal generation module, records the actual voltage value and the actual current value of the input signal, calculates the effective value Xhyx and the signal peak value Xhfz of the input signal, and transmits the calculated effective value Xhyx and the signal peak value Xhfz of the input signal to the relay; The relay test module activates the relay through an input signal, records the action time, hold time and release time of the relay, calculates the response time Xysj, action time Dzsj and malfunction rate Wdzl of the relay, and monitors its response; The signal output module feeds back the output signal of the relay to the system, records the parameters of the output signal, calculates the ratio Srbl of the effective value Scyx of the output signal to the input signal, and sends the above data to the data processing and output module; The data processing and output module collects the data of all modules, performs statistical analysis, calculates the standard deviation Bcxh of the test signal, and generates a signal test report by integrating the above-mentioned calculated values ​​of all signals and outputs it through a display window.

2. A protection device signal relay test system according to claim 1, Features: The signal input module receives the signal from the signal generation module, records the actual voltage value and the actual current value of the input signal, and calculates the effective value Xhyx of the input signal. The calculation formula is as follows: In the formula, Xhyx represents the effective value of the input signal, T represents the period of the signal, x(t) represents the instantaneous value of the signal x at time t, and dt represents the integral sign.

3. A protection device signal relay testing system according to claim 2, Features: The signal input module receives the signal from the signal generation module, records the actual voltage value and the actual current value of the input signal, and calculates the input signal peak value Xhfz. The calculation formula is as follows: Xhfz=max|x(t)| In the formula, Xhfz represents the peak value of the input signal, |x(t)| represents the absolute value of the signal at time t, where t∈[0,T], and T represents the period of the signal.

4. A protection device signal relay testing system according to claim 3, Features: The relay test module activates the relay through the input signal, records the action time, holding time and release time of the relay, and calculates the response time Xysj of the relay. The calculation formula is as follows: Xysj=TS action -Ts input In the formula, Xysj represents the response time of the relay, TSa ction Indicates the time when the relay starts to act, Ts input Indicates the time when the input signal is active.

5. A protection device signal relay testing system according to claim 4, Features: The relay test module activates the relay through the input signal, records the relay's action time, hold time and release time, and calculates the relay's action time Dzsj. The calculation formula is as follows: Dzsj=TS switch -T sinput In the formula, Dzsj represents the action time of the relay, TS switch Indicates the time it takes for the relay to fully switch to the activated state, Ts input Indicates the time when the input signal is active.

6. A protection device signal relay testing system according to claim 5, Features: The relay test module activates the relay through the input signal, records the action time, holding time and release time of the relay, and calculates the false operation rate Wdzl of the relay. The calculation formula is as follows: In the formula, Wdzl represents the false operation rate of the relay, N false Indicates the number of false actions, N total Indicates the total number of actions.

7. A protection device signal relay testing system according to claim 6, Features: The signal output module feeds back the output signal of the relay to the system, records the parameters of the output signal, and calculates the effective value Scyx of the output signal. The calculation formula is as follows: In the formula, Scyx represents the effective value of the output signal, N represents the number of sampling points of the output signal, and y i Represents the value of the i-th output signal sampling point, where i represents the counting subscript.

8. A protection device signal relay testing system according to claim 7, Features: The signal output module feeds back the output signal of the relay to the system, records the parameters of the output signal, and calculates the ratio Srbl of the input signal. The calculation formula is as follows: In the formula, Srbl represents the ratio of the input signal, Scyx represents the effective value of the output signal, and Xhyx represents the effective value of the input signal.

9. A protection device signal relay testing system according to claim 8, Features: The data processing and output module collects the data of all modules, performs statistical analysis, and calculates the standard deviation Bcxh of the test signal. The calculation formula is as follows: In the formula, Bcxh represents the standard deviation of the test signal, M represents the number of samples in the data set, and x i represents the value of the i-th signal sample, and μ represents the mean of the signal data set.

10. A method for testing a signal relay of a protection device, It is characterized in that The following steps are involved: S1. Generate a test signal, including current, voltage and frequency, through a signal generation module, and record the generated signal parameters, including amplitude, frequency and waveform; S2, the signal input module receives the signal from the signal generation module, records the actual voltage value and the actual current value of the input signal, calculates the effective value Xhyx and the signal peak value Xhfz of the input signal, and transmits the calculated effective value Xhyx and the signal peak value Xhfz of the input signal to the relay; S3, the relay test module activates the relay through the input signal, records the relay's action time, hold time and release time, calculates the relay's response time Xysj, action time Dzsj and false operation rate Wdzl, and monitors its response; S4, the signal output module feeds back the output signal of the relay to the system, records the parameters of the output signal, calculates the ratio Srbl of the effective value Scyx of the output signal and the input signal, and sends the above data to the data processing and output module; S5. The data processing and output module summarizes the data of all modules, performs statistical analysis, calculates the standard deviation Bcxh of the test signal, and generates a signal test report by integrating the above-mentioned signal calculation values ​​and outputs it through the display window.

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