Intelligent transmitting device function test method and system

Abstract

The invention discloses a function test method and system for an intelligent transmitting device, and relates to the technical field of intelligent test, and the method comprises the steps: testing an element in the intelligent transmitting device, and obtaining the state data of the element; comparing the state data with a state condition to obtain the state of the element; and carrying out comprehensive analysis according to the states of the elements to realize the function test of the intelligent transmitting device. According to the function test method for the intelligent transmitting device provided by the invention, the condition that the intelligent transmitting device meets the transmission precision of the power signal when the generator runs can be comprehensively verified, the reliable transmission of the power signal of the generator is ensured under various working conditions, and the single 4-20mA analog quantity output test of the intelligent transmitting device is made up; functional testing is carried out by combining a verification method of a relay protection device, various functions of the intelligent transmitting device are verified by using accurate data, and the correctness and stability of power signals of a generator in the intelligent transmitting device are ensured.

Description

Technical Field

[0001] The present invention relates to the field of intelligent testing technology, and in particular to a method and system for testing the function of an intelligent transmitter. Background Art

[0002] As a key component of modern industrial automation and digital transformation, intelligent transmitters play a vital role in the digital electro-hydraulic regulation DEH and distributed control system DCS of power plants. These devices not only improve the stability of power signal sampling and transmission, but also greatly enhance the system's anti-interference ability, thereby ensuring the reliability and efficiency of the power generation process; compared with traditional electrical measurement transmitters, intelligent transmitters abandon pure analog circuit technology and adopt advanced CPU processors to achieve more flexible function switching and fault recording capabilities. For example, intelligent transmitters can realize real-time data acquisition, signal filtering, self-diagnosis or remote configuration, improving system reliability and maintenance efficiency. Therefore, this digital transformation makes intelligent transmitters no longer limited to simple signal conversion, but a multi-functional intelligent terminal capable of more complex data processing and analysis.

[0003] However, although with the advancement of technology, intelligent transmitters have gradually replaced traditional electrical measurement transmitters, the electrical measurement signal verification method has not been updated synchronously in on-site electrical measurement work. The current electrical measurement work still uses traditional methods, mainly focusing on the accuracy of 4-20mA output. This approach ignores many advanced functions of intelligent transmitters, such as alarm mechanisms or switching functions, especially the lack of strict and comprehensive inspection of key parameters such as action values, criteria and time, and the inability to comprehensively calibrate intelligent transmitters. The limitations of this inspection method may lead to potential system risks being ignored, affecting the safety and reliability of the entire power generation system. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is how to provide a method for testing the function of an intelligent transmitter, which, in addition to the static test of the intelligent transmitter, also provides a method for comprehensively testing the dual power supply reliability of the intelligent transmitter and the alarm criteria and output of the dual PT / CT.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a method for functional inspection of an intelligent transmission device, which includes inspecting components in the intelligent transmission device to obtain status data of the components; obtaining the status of the components based on the comparison of the status data with status conditions; and performing a comprehensive analysis based on the status of the components to implement functional inspection of the intelligent transmission device.

[0008] As a preferred solution of the function inspection method of the intelligent transmitter device described in the present invention, the inspection of the components in the intelligent transmitter device includes checking the reliability of the dual power supply, PT circuit test, CT circuit test and checking the power signal with the DCS system, DEH system and RTU system.

[0009] As a preferred solution of the function inspection method of the intelligent transmission device described in the present invention, wherein: the inspection of the reliability of the dual power supply includes a device power self-start test, a device DC power pull-in test and a dual power supply reliability check; the PT circuit test includes a PT line break alarm criterion test and a PT abnormal alarm criterion test; the CT circuit test includes a CT switching criterion test, a CT line break alarm criterion test and a measurement CT and protection CT differential current over-limit alarm criterion test; the power signal verification with the DCS system, DEH system and RTU system includes a DCS system, DEH system and RTU system value comparison and a PT and CT switching test.

[0010] As a preferred solution of the function inspection method of the intelligent transmission device described in the present invention, the device power self-start test includes: closing the power switch on the DC power plug, adjusting the test power from zero to T% rated power value, judging the device operation light, if the device operation light is on, it is judged that there is no abnormality in the device; if the device operation light is not on, it is judged that there is an abnormality in the device; the device DC power pull-in test includes: reducing the rated voltage of the DC power supply system, when the rated voltage of the DC power supply system is reduced to T%, performing N power on and off operations and judging the inverter power supply, if the inverter power supply is normal in the N power on and off operations If the inverter power supply starts normally, it is determined that the inverter power supply is normal; if the inverter power supply fails to start normally once or more times in the N power on and off operations, it is determined that the inverter power supply is abnormal; the dual power supply reliability check includes: closing all power switches, judging the operation of the device, and if the device is operating normally, executing the next step; if the device is not operating normally, it is determined that the dual power supply is abnormal; pulling and closing the main power switch and the backup power switch respectively, judging the alarm light and power alarm message of the device, if the corresponding alarm light of the device is on and the power alarm message is correct, executing the next step; otherwise, it is determined that the dual power supply is abnormal; applying a rated current A to the device 双 and rated voltage V 双, and judge the power curves in the DEH system and DCS system when switching between the main power supply and the backup power supply. If the power curves in the DEH system and the DCS system are continuous and uninterrupted and there is no abnormality in the screen, it is determined that the dual power supply is normal; otherwise, it is determined that there is an abnormality in the dual power supply.

[0011] As a preferred solution of the intelligent transmitter function test method of the present invention, the PT disconnection alarm criterion test includes: applying a voltage V to the PT circuit 正 and current A 正 , and adjust based on the voltage step length V0, and judge the action criteria of the positive sequence voltage and the negative sequence voltage respectively. If the positive sequence voltage is less than the first fixed value voltage V1, and the current is greater than y1% of the rated current A 额 , or the negative sequence voltage is greater than the second fixed voltage V2, a "PT line break" alarm signal is sent within Q1 time; when the current is reduced, the PT line break signal disappears; the PT line break alarm criterion inspection step is reversed to verify whether the action criterion of the positive sequence voltage and the action criterion of the negative sequence voltage are established when the "PT line break" alarm signal is sent. If established, the PT line break alarm criterion is determined to be correct; if not established, the PT line break alarm criterion is determined to be wrong, and the PT line break alarm criterion is adjusted; the PT abnormal alarm criterion inspection includes: applying a voltage V to the PT circuit 正 and current A 正 , and adjust based on the voltage step size V0, judge the action criterion of the maximum phase voltage, if the difference of the maximum phase voltage of the N-way voltage is greater than the third fixed voltage V3, then the voltage of the road with a smaller voltage value will report PT abnormality; judge the action criterion of the positive sequence voltage, if the difference of the positive sequence voltage of the N-way voltage is greater than the fourth fixed voltage V4, then the road with a smaller voltage value will report PT abnormality; judge the action criterion of the negative sequence voltage, if the negative sequence voltage of a certain road voltage is greater than the fifth fixed voltage V5, then the corresponding road will report PT disconnection; judge the action criterion of the main voltage circuit PT Perform judgment, when the main voltage circuit PT abnormal alarm occurs, switch the PT circuit; judge the action criterion of the backup voltage circuit PT, when the backup voltage circuit PT abnormal alarm occurs, do not switch the PT circuit; reversely perform the PT abnormal alarm criterion inspection step to verify whether the corresponding action criterion is established when there is a PT abnormality, PT disconnection, PT circuit switching or no PT circuit switching. If established, the PT abnormal alarm criterion is determined to be correct; if not established, the PT abnormal alarm criterion is determined to be wrong, and the PT abnormal alarm criterion is adjusted.

[0012] As a preferred solution of the function test method of the intelligent transmitter device of the present invention, the CT switching criterion test includes: applying a voltage V to the CT circuit 正 and current A 正, and gradually increase the current based on the current step A0, and judge the action criterion of the protection CT current. If the protection CT current is greater than x times the first fixed current A1, the rated current A 额 Start switching; reverse the CT switching criterion test steps to verify that when the rated current A 额 When starting the switch, whether the action criterion of the protection CT current is established, if established, the CT switching criterion is determined to be correct; if not established, the CT switching criterion is determined to be wrong, and the CT switching criterion is adjusted; the CT disconnection alarm criterion test includes: applying current A to the CT circuit 正 By changing the step size of one phase current, the self-generated zero-sequence current of the three-phase CT is changed, and the action criterion of the self-generated zero-sequence current of the three-phase CT is judged. If the self-generated zero-sequence current of the three-phase CT is greater than y2% of the maximum phase current and y3% of the rated current A 额 The sum of the currents of the three-phase CT and the current of the three-phase CT is the sum of the currents of the three-phase CT and the current of the three-phase CT, and then the CT line is broken after the delay of Q2 time; the CT line break alarm criterion inspection step is reversed to verify whether the action criterion of the self-generated zero-sequence current of the three-phase CT is established when the CT line is broken. If established, the CT line break alarm criterion is determined to be correct; if not established, the CT line break alarm criterion is determined to be wrong, and the CT line break alarm criterion is adjusted; the said CT and protection CT differential current over-limit alarm criterion inspection includes: applying voltage V to the CT circuit 正 and current A 正 , and gradually increase the current based on the current step A0, and judge the maximum phase current of the measured CT. If the difference between the maximum phase current of the measured CT and the maximum phase current of the protection CT is greater than m1 times the maximum phase current of the measured CT, and the maximum phase current of the measured CT is greater than the rated current A 额 m2 times, the differential current over-limit alarm signal between the measuring CT and the protection CT is sent, and the signal is automatically returned after the abnormality disappears.

[0013] As a preferred solution of the function inspection method of the intelligent transmitter device of the present invention, the comparison of the values ​​of the DCS system, DEH system and RTU system includes: applying power values ​​of z1%, z2%, z3%, z4% and z5% to the intelligent transmitter device, and judging the values ​​of the DCS system, DEH system and RTU system under different power values ​​respectively. If the values ​​of the DCS system, DEH system and RTU system are consistent, the intelligent transmitter device is judged to be normal; if the values ​​of the DCS system, DEH system and RTU system are inconsistent, the intelligent transmitter device is judged to be normal. There is an abnormality in the device; the PT and CT switching test includes: under the full power range, PT and CT switching tests are performed respectively and judgments are made. When the PT switching test is performed, if the power curves in the DCS system, DEH system and RTU system are continuous and uninterrupted and there is no abnormality in the screen, the PT switching is determined to be normal; otherwise, it is determined that there is an abnormality in the PT switching; when the CT switching test is performed, if the power curves in the DCS system, DEH system and RTU system are continuous and uninterrupted and there is no abnormality in the screen, the CT switching is determined to be normal; otherwise, it is determined that there is an abnormality in the CT switching.

[0014] In the second aspect, in order to further solve the safety problems existing in intelligent inspection, the present invention provides an intelligent transmitter device function inspection system in an embodiment, which includes: a data acquisition module, which is used to perform different checks on the dual power supply, PT circuit, CT circuit and power signal in the intelligent transmitter device with the DCS system, DEH system and RTU system respectively, and obtain the status data of the component; a status comparison module, which is used to compare the status data with the corresponding status conditions to obtain the status of the component; a function verification module, which is used to comprehensively obtain the functional status of the intelligent transmitter device according to the status of the component, and realize the function inspection of the intelligent transmitter device.

[0015] In a third aspect, an embodiment of the present invention provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, wherein: when the computer program is executed by the processor, any step of a method for verifying the function of an intelligent transmitter device as described in the first aspect of the present invention is implemented.

[0016] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein: when the computer program is executed by a processor, any step of a method for verifying the function of an intelligent transmitter device as described in the first aspect of the present invention is implemented.

[0017] Beneficial effects of the present invention: The present invention proposes a method for verifying the function of an intelligent transmitter, which can comprehensively verify that the intelligent transmitter meets the transmission accuracy of the power signal when the generator is running, and ensure the reliable transmission of the generator power signal under various working conditions, thereby making up for the single 4-20mA analog output test of the intelligent transmitter; by combining the verification method of the relay protection device to perform functional testing, the various functions of the intelligent transmitter are verified with accurate data, thereby ensuring the correctness and stability of the generator power signal in the intelligent transmitter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0019] Figure 1 This is an overall flow chart of a method for testing the function of an intelligent transmitter in Example 1.

[0020] Figure 2 This is a schematic diagram of the structure of the computer device in Example 3. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0024] Example 1

[0025] Reference Figure 1 , which is the first embodiment of the present invention, and provides a method for testing the function of an intelligent transmitter.

[0026] The existing inspection methods for intelligent transmitters have the following main problems: Current electrical measurement work still uses traditional methods, mainly focusing on the accuracy of 4-20mA output. This approach ignores many advanced functions of intelligent transmitters, such as alarm mechanisms or switching functions, especially the lack of strict and comprehensive inspections on key parameters such as action values, criteria and time, and is unable to fully calibrate intelligent transmitters. The limitations of this inspection method may lead to potential system risks being ignored, affecting the safety and reliability of the entire power generation system.

[0027] The present application provides an effective solution to the above-mentioned problems. Next, a method for implementing the function inspection of the intelligent transmitter device will be described in detail in combination with multiple embodiments.

[0028] Figure 1 The overall flow chart of a method for testing the function of an intelligent transmitter is shown, including:

[0029] S1: Inspect the components in the intelligent transmitter and obtain the status data of the components.

[0030] Preferably, the inspection of the components in the intelligent transmitter includes checking the reliability of the dual power supply, PT loop test, CT loop test, and checking the power signal with the DCS system, DEH system and RTU system.

[0031] Furthermore, the reliability of the dual power supply is checked including the device power self-start test, the device DC power pull-in test and the dual power supply reliability check.

[0032] The PT circuit test includes the PT disconnection alarm criterion test and the PT abnormality alarm criterion test.

[0033] The CT circuit test includes the CT switching criterion test, the CT line break alarm criterion test and the measurement CT and protection CT differential current over-limit alarm criterion test.

[0034] The power signal verification with DCS system, DEH system and RTU system includes the comparison of DCS system, DEH system and RTU system values ​​and the PT and CT switching test.

[0035] S2: Obtain the component status based on the comparison between the status data and the status condition.

[0036] Specifically, the device power self-start test includes: closing the power switch on the DC power plug, adjusting the test power from zero to T% rated power value, judging the device operation light, if the device operation light is on, it is determined that there is no abnormality in the device.

[0037] If the device operation light is off, it is determined that there is an abnormality in the device.

[0038] Specifically, the DC power supply pulling-in and pulling-out test of the device includes: reducing the rated voltage of the DC power supply system. When the rated voltage of the DC power supply system is reduced to T%, performing N power on and off operations and judging the inverter power supply. If the inverter power supply starts normally in the N power on and off operations, it is determined that the inverter power supply is normal.

[0039] If the inverter power supply fails to start normally once or more in N power on and off operations, it is determined that there is an abnormality in the inverter power supply, thereby ensuring that the DC power supply system can operate stably when the grid voltage fluctuates or decreases, especially the inverter power supply part, to maintain continuous power supply to key equipment in the power system.

[0040] Specifically, the dual power supply reliability check includes: turning on all power switches, judging the operation of the device, and executing the next step if the device operates normally.

[0041] If the device does not operate normally, it is determined that there is an abnormality in the dual power supply.

[0042] Pull and close the main power switch and the backup power switch respectively, and judge the alarm light and power alarm message of the device. If the corresponding alarm light of the device is on and the power alarm message is correct, proceed to the next step.

[0043] Otherwise, it is determined that there is an abnormality in the dual power supply.

[0044] Apply rated current A to the device 双 and rated voltage V 双 , and judge the power curves in the DEH system and DCS system when switching between the main power supply and the backup power supply. If the power curves in the DEH system and the DCS system are continuous and uninterrupted and there is no abnormality in the screen, it is determined that the dual power supply is normal and the dual power supply is reliable.

[0045] Otherwise, it is determined that there is an abnormality in the dual power supply.

[0046] Preferably, the present invention comprehensively evaluates the stability and reliability of the power supply system of the intelligent transmitter device by checking the device power self-start test, DC power supply pull-in test and dual power supply reliability, which not only ensures the stable operation of the intelligent transmitter device under normal working voltage, but also verifies the anti-interference ability of the intelligent transmitter device when the grid voltage fluctuates or decreases. In particular, the repeated testing of the inverter power supply effectively improves the power supply reliability of key equipment when the grid fluctuates, which is of great significance for ensuring the stable operation of the power system.

[0047] Specifically, the PT disconnection alarm criterion test includes: applying voltage V to the PT circuit 正 and current A 正, and adjust based on the voltage step length V0, and judge the action criteria of the positive sequence voltage and the negative sequence voltage respectively. If the positive sequence voltage is less than the first fixed value voltage V1, and the current is greater than y1% of the rated current A 额 , or the negative sequence voltage is greater than the second set voltage V2, a "PT disconnection" alarm signal is sent within the Q1 time.

[0048] When the current is reduced, the PT disconnection signal disappears.

[0049] Perform the PT line break alarm criterion verification steps in reverse to verify whether the action criterion of the positive sequence voltage and the action criterion of the negative sequence voltage are established when the "PT line break" alarm signal is sent. If so, it is determined that the PT line break alarm criterion is correct.

[0050] If not, it is determined that the PT disconnection alarm criteria are wrong and the PT disconnection alarm criteria are adjusted.

[0051] Specifically, the PT abnormal alarm judgment test includes: applying voltage V to the PT circuit 正 and current A 正 , and based on the voltage step size V0, the action criterion of the maximum phase voltage is judged. If the difference between the maximum phase voltages of the N voltages is greater than the third fixed voltage V3, the voltage of the voltage with the smaller voltage value will report PT abnormality.

[0052] The action criterion of the positive sequence voltage is judged. If the difference of the positive sequence voltages of the N circuits is greater than the fourth fixed voltage V4, the circuit with the smaller voltage value will report PT abnormality.

[0053] The action criterion of the negative sequence voltage is judged. If the negative sequence voltage of a certain line is greater than the fifth set voltage V5, the corresponding line will report that the PT is broken.

[0054] The action criteria of the main voltage circuit PT are judged, and when the main voltage circuit PT abnormal alarm is given, the PT circuit is switched.

[0055] The action criteria of the backup voltage circuit PT are judged. When the backup voltage circuit PT abnormal alarm occurs, the PT circuit is not switched.

[0056] Reversely perform the PT abnormal alarm judgment criterion inspection steps to verify whether the corresponding action criterion is established when there is a PT abnormality, PT disconnection, PT circuit switching or no PT circuit switching. If established, the PT abnormal alarm judgment criterion is determined to be correct.

[0057] If not, it is determined that the PT abnormal alarm judgment criteria are wrong, and the PT abnormal alarm judgment criteria are adjusted.

[0058] Specifically, the CT switching criterion test includes: applying a voltage V to the CT circuit 正and current A 正 , and gradually increase the current based on the current step A0, and judge the action criterion of the protection CT current. If the protection CT current is greater than x times the first fixed current A1, the rated current A 额 Initiate the switch.

[0059] Reverse the CT switching criterion test steps to verify that when the rated current A 额 When starting the switching, the action criterion of the protection CT current is checked to see whether it is established. If so, it is determined that the CT switching criterion is correct.

[0060] If not, it is determined that the CT switching criterion is wrong and the CT switching criterion is adjusted.

[0061] Specifically, the CT disconnection alarm criterion test includes: applying current A to the CT circuit 正 By changing the step size of one phase current, the self-generated zero-sequence current of the three-phase CT is changed, and the action criterion of the self-generated zero-sequence current of the three-phase CT is judged. If the self-generated zero-sequence current of the three-phase CT is greater than y2% of the maximum phase current and y3% of the rated current A 额 If the sum of the two is exceeded, the CT disconnection will be reported after the delay time Q2.

[0062] Reversely perform the CT line break alarm criterion inspection steps to verify whether the action criterion of the self-generated zero-sequence current of the three-phase CT is established when the CT line break is reported. If established, it is determined that the CT line break alarm criterion is correct.

[0063] If not, it is determined that the CT disconnection alarm criterion is wrong and the CT disconnection alarm criterion is adjusted.

[0064] It should be noted that the CT disconnection alarm criterion test proposed in the present invention is only for the measurement CT, and there is no such test for the protection CT.

[0065] Preferably, the present invention introduces reverse verification and dynamic adjustment mechanisms in multiple inspection steps. For example, a reverse verification step is set in both the PT line break alarm criterion inspection and the CT switching criterion inspection. If the criterion is not established, the system will automatically adjust the criterion. This dynamic adjustment mechanism effectively improves the adaptability and accuracy of the inspection method, allowing the system to continuously optimize the criterion according to actual operating conditions, thereby improving the long-term operating reliability of the intelligent transmitter.

[0066] Specifically, the over-limit alarm criterion test of the differential current between the measuring CT and the protection CT includes: applying a voltage V to the CT circuit 正 and current A 正, and gradually increase the current based on the current step A0, and judge the maximum phase current of the measured CT. If the difference between the maximum phase current of the measured CT and the maximum phase current of the protection CT is greater than m1 times the maximum phase current of the measured CT, and the maximum phase current of the measured CT is greater than the rated current A 额 m2 times, the differential current over-limit alarm signal between the measuring CT and the protection CT is sent, and the signal is automatically returned after the abnormality disappears.

[0067] Preferably, the present invention designs a series of refined inspection steps for the PT circuit and the CT circuit, including inspections of line break alarm, abnormal alarm and switching criteria, which not only cover conventional voltage and current measurements, but also take into account system responses under various abnormal conditions; for example, in the PT abnormal alarm criterion inspection, the multi-dimensional judgment of the maximum phase voltage, positive sequence voltage and negative sequence voltage is used to effectively improve the system's recognition accuracy of PT abnormalities; similarly, by introducing the judgment of the three-phase CT self-generated zero-sequence current in the CT line break alarm criterion inspection, a more reliable basis is provided for CT line break detection. These refined inspection measures significantly improve the fault diagnosis capability and operational reliability of the intelligent transmitter.

[0068] Specifically, the comparison of the values ​​of the DCS system, DEH system and RTU system includes: applying power values ​​of z1%, z2%, z3%, z4% and z5% to the intelligent transmitter, and judging the values ​​of the DCS system, DEH system and RTU system at different power values ​​respectively. If the values ​​of the DCS system, DEH system and RTU system are consistent, it is determined that the intelligent transmitter is normal.

[0069] If the values ​​of the DCS system, DEH system and RTU system are inconsistent, it is determined that there is an abnormality in the intelligent transmission device.

[0070] Specifically, the PT and CT switching test includes: under the full power range, PT and CT switching tests are performed and judged respectively. When the PT switching test is performed, if the power curves in the DCS system, DEH system and RTU system are continuous and uninterrupted and there is no abnormality in the screen, it is determined that the PT switching is normal.

[0071] Otherwise, it is determined that there is an abnormality in the PT switching.

[0072] When performing the CT switching test, if the power curves in the DCS system, DEH system and RTU system are continuous and uninterrupted and there is no abnormality in the screen, it is determined that the CT switching is normal.

[0073] Otherwise, it is determined that there is an abnormality in CT switching.

[0074] Preferably, the present invention comprehensively evaluates the coordination between the intelligent transmitter and other systems by performing numerical comparisons of the DCS system, DEH system and RTU system and PT and CT switching tests. This system linkage test not only verifies the accuracy of data transmission, but also ensures the stability of the entire system when key components (such as PT and CT) are switched. In particular, the switching test performed under full power range fully simulates the extreme conditions that may be encountered in actual operation, and effectively improves the reliability of the system under high load conditions.

[0075] S3: Perform comprehensive analysis based on the status of components to achieve functional inspection of the intelligent transmitter.

[0076] In summary, the present invention proposes a method for verifying the function of an intelligent transmitter, which can comprehensively verify that the intelligent transmitter meets the transmission accuracy of the power signal when the generator is running, and ensure the reliable transmission of the generator power signal under various working conditions, thereby making up for the single 4-20mA analog output test of the intelligent transmitter; by combining the verification method of the relay protection device to perform functional testing, the various functions of the intelligent transmitter are verified with accurate data, thereby ensuring the correctness and stability of the generator power signal in the intelligent transmitter.

[0077] Embodiment 2 is an embodiment of the present invention, which provides a function inspection system for an intelligent transmitter, including: a data acquisition module, used to perform different inspections on the dual power supply, PT circuit, CT circuit and power signal in the intelligent transmitter with the DCS system, DEH system and RTU system respectively, to obtain the status data of the components; a status comparison module, used to compare the status data with the corresponding status conditions to obtain the status of the components; a function inspection module, used to obtain the functional status of the intelligent transmitter according to the status of the components, to realize the function inspection of the intelligent transmitter.

[0078] Embodiment 3 is an embodiment of the present invention, which is different from the previous embodiment in that:

[0079] like Figure 2As shown, if the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0080] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0081] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0082] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0083] Example 4 is an embodiment of the present invention, which provides a method for testing the function of an intelligent transmitter. In order to verify the beneficial effects of the present invention, a scientific demonstration is carried out through simulation experiments.

[0084] This example simulates the operating environment of the intelligent transmitter in the actual environment, and verifies four functions of the intelligent transmitter: reliability of dual power supply, PT circuit, CT circuit, and verification of power signal with DCS system, DEH system and RTU system.

[0085] First, when conducting the reliability check of the dual power supply, for the device power self-start test, by closing the power switch on the DC power plug, the test power supply is slowly adjusted from zero to 80% of the rated power value, and it is found that the device operation light is on and there is no abnormality in the device; for the device DC power supply closing test, by reducing the rated voltage of the DC power supply system to 80%, three power on and off operations are performed to verify whether the inverter power supply can start normally when the grid voltage fluctuates or decreases, thereby ensuring the continuous power supply to the key equipment of the power system; for the dual power supply reliability check, by closing all the power switches, the situation of the device is analyzed, and the corresponding alarm lights and power warning messages are judged when the main power switch and the backup power switch are closed. After that, when the rated voltage and rated current are applied to the device, the continuity and picture of the power curve in the DEH system and DCS system when the main power switch and the backup power switch are switched are analyzed to analyze the reliability of the dual power supply.

[0086] Secondly, when conducting the PT circuit test, for the PT disconnection alarm criterion test, by applying 57.7V voltage and 0.5A current to the PT circuit, and adjusting it according to the voltage step of 3V, it is verified whether the positive sequence voltage is less than 20V, whether the current is greater than 5% of the rated current, or the negative sequence voltage is greater than 2.5V. If any of the conditions are met, a "PT disconnection" alarm signal will be sent within 10s, and when the "PT disconnection" alarm signal is detected later, the positive sequence voltage and negative sequence voltage will be analyzed, and then according to the analysis results, the positive sequence voltage and negative sequence voltage will be analyzed. The results are judged and adjusted; for the PT abnormal alarm criterion test, by applying 57.7V voltage and 0.5A current to the PT circuit and adjusting it according to the voltage step of 3V, it is judged whether the difference between the maximum phase voltages of the 2 circuits is greater than 2.5V, whether the difference between the positive sequence voltages of the 2 circuits is greater than 2.5V, whether the negative sequence voltage of one circuit is greater than 2.5V, whether the PT of the main voltage circuit has an abnormal alarm, and whether the PT of the backup voltage circuit has an abnormal alarm. The above steps are performed in reverse to realize the PT abnormal alarm criterion test.

[0087] In addition, when conducting CT circuit tests, for the CT switching criterion test, by applying 57.7V voltage and 0.5A current to the CT circuit, and gradually increasing the current in steps of 0.01A, it is judged whether the protection CT current is greater than 1.1 times the rated current, and reverse verification is performed; for the CT line break alarm criterion test, by applying 0.5A current to the CT circuit, and based on the step size of changing one-phase current, the self-generated zero-sequence current of the three-phase CT is changed, and then it is judged whether the self-generated zero-sequence current of the three-phase CT is greater than the sum of 25% of the maximum phase current and 5% of the rated current. If it meets Then, after a delay of 10s, the CT line is reported to be broken, and reverse verification is performed; for the test of the differential current over-limit alarm criterion between the measuring CT and the protection CT, by applying 57.7V voltage and 0.5A current to the CT circuit, and gradually increasing the current in steps of 0.01A, it is determined whether the difference between the maximum phase current of the measuring CT and the maximum phase current of the protection CT is greater than 0.1 times the maximum phase current of the measuring CT, and whether the maximum phase current of the measuring CT is greater than 0.3 times the rated current. If all of them are met, the differential current over-limit alarm signal between the measuring CT and the protection CT is sent, and the signal is automatically returned after the abnormality disappears.

[0088] Finally, when checking the power signal with the DCS system, DEH system and RTU system, for the comparison of the values ​​of the DCS system, DEH system and RTU system, by applying 20%, 40%, 60%, 80% and 100% power values ​​to the intelligent transmitter, it is judged whether the values ​​of the DCS system, DEH system and RTU system are consistent; for the PT and CT switching test, by performing PT switching test and CT switching test respectively under the full power range, and judging the continuity and picture conditions of the power curves in the DEH system, DCS system and RTU system; therefore, it can be seen from the above content that the present invention can comprehensively verify that the intelligent transmitter meets the transmission accuracy of the power signal when the generator is running through the experimental results obtained, ensure the reliable transmission of the generator power signal under various working conditions, and ensure the correctness and stability of the generator power signal in the intelligent transmitter.

[0089] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for testing the function of an intelligent transmitter, characterized in that: include: Inspect the components in the intelligent transmitter and obtain the status data of the components; Comparing the state data with the state condition to obtain the state of the component; A comprehensive analysis is performed based on the status of the components to achieve functional inspection of the intelligent transmitter.

2. The method for testing the function of the intelligent transmitter according to claim 1, characterized in that: The inspection of the components in the intelligent transmitter includes checking the reliability of the dual power supply, PT loop test, CT loop test and checking the power signal with the DCS system, DEH system and RTU system.

3. The method for testing the function of the intelligent transmitter according to claim 2, characterized in that: The reliability check of the dual power supply includes a device power supply self-start test, a device DC power supply pull-in test and a dual power supply reliability check; The PT circuit test includes a PT disconnection alarm criterion test and a PT abnormality alarm criterion test; The CT circuit test includes CT switching criterion test, CT disconnection alarm criterion test and measurement CT and protection CT differential current over-limit alarm criterion test; The power signal verification with the DCS system, DEH system and RTU system includes a comparison of DCS system, DEH system and RTU system values ​​and a PT and CT switching test.

4. The method for testing the function of the intelligent transmitter according to claim 3, characterized in that: The device power self-start test includes: Close the power switch on the DC power plug, adjust the test power from zero to T% rated power value, and judge the device operation light. If the device operation light is on, it is judged that there is no abnormality in the device; If the device operation light is off, it is determined that the device is abnormal; The DC power supply closing test of the device includes: The rated voltage of the DC power supply system is reduced. When the rated voltage of the DC power supply system is reduced to T%, N power on and off operations are performed and the inverter power supply is judged. If the inverter power supply starts normally in the N power on and off operations, it is judged that the inverter power supply is normal. If the inverter power supply fails to start normally once or more times in the N power supply on-off operations, it is determined that the inverter power supply is abnormal; The dual power supply reliability check includes: Turn on all power switches and judge the operation of the device. If the device is operating normally, proceed to the next step; If the device does not operate normally, it is determined that there is an abnormality in the dual power supply; Pull and close the main power switch and the backup power switch respectively, and judge the alarm light and power alarm message of the device. If the corresponding alarm light of the device is on and the power alarm message is correct, proceed to the next step; Otherwise, it is determined that the dual power supply is abnormal; Apply rated current A to the device 双 and rated voltage V 双 , and judge the power curves in the DEH system and DCS system when switching between the main power supply and the backup power supply. If the power curves in the DEH system and the DCS system are continuous and uninterrupted and there is no abnormality in the screen, it is determined that the dual power supply is normal; Otherwise, it is determined that there is an abnormality in the dual power supply.

5. The method for testing the function of the intelligent transmitter according to claim 4, characterized in that: The PT disconnection alarm criterion test includes: Apply voltage V to the PT circuit 正 and current A 正 , and adjust based on the voltage step length V0, and judge the action criteria of the positive sequence voltage and the negative sequence voltage respectively. If the positive sequence voltage is less than the first fixed value voltage V1, and the current is greater than y1% of the rated current A 额 , or the negative sequence voltage is greater than the second set voltage V2, a "PT disconnection" alarm signal is sent within the Q1 time; When the current is reduced, the PT disconnection signal disappears; Reversely carry out the PT line break alarm criterion inspection step to verify whether the positive sequence voltage action criterion and the negative sequence voltage action criterion are established when the "PT line break" alarm signal is sent. If so, it is determined that the PT line break alarm criterion is correct; If it is not established, it is determined that the PT disconnection alarm judgment criteria are wrong, and the PT disconnection alarm judgment criteria are adjusted; The PT abnormal alarm criterion test includes: Apply voltage V to the PT circuit 正 and current A 正 , and based on the voltage step length V0, the action criterion of the maximum phase voltage is judged. If the difference between the maximum phase voltages of the N circuits is greater than the third fixed voltage V3, the circuit with the smaller voltage value will report PT abnormality; The action criterion of the positive sequence voltage is judged. If the difference of the positive sequence voltages of the N circuits is greater than the fourth fixed voltage V4, the circuit with the smaller voltage value will report a PT abnormality. The action criterion of negative sequence voltage is judged. If the negative sequence voltage of a certain line is greater than the fifth set voltage V5, the corresponding line will report PT disconnection; Determine the action criteria of the main voltage circuit PT, and switch the PT circuit when the main voltage circuit PT alarms abnormally; The action criteria of the backup voltage circuit PT are judged. When the backup voltage circuit PT alarms abnormally, the PT circuit is not switched; Reversely perform the PT abnormal alarm judgment criterion inspection step to verify whether the corresponding action judgment criterion is established when there is a PT abnormality, a PT disconnection, a PT circuit switching, or no PT circuit switching. If established, it is determined that the PT abnormal alarm judgment criterion is correct; If not, it is determined that the PT abnormal alarm judgment criteria are wrong, and the PT abnormal alarm judgment criteria are adjusted.

6. The method for testing the function of the intelligent transmitter according to claim 5, characterized in that: The CT switching criterion test includes: Apply voltage V to the CT circuit 正 and current A 正 , and gradually increase the current based on the current step A0, and judge the action criterion of the protection CT current. If the protection CT current is greater than x times the first fixed current A1, the rated current A 额 Start the switch; Reverse the CT switching criterion test steps to verify that when the rated current A 额 When starting the switch, whether the action criterion of the protection CT current is established, if established, the CT switching criterion is determined to be correct; If it is not true, it is determined that the CT switching criterion is wrong and the CT switching criterion is adjusted; The CT disconnection alarm criterion test includes: Apply current A to the CT circuit 正 By changing the step size of one phase current, the self-generated zero-sequence current of the three-phase CT is changed, and the action criterion of the self-generated zero-sequence current of the three-phase CT is judged. If the self-generated zero-sequence current of the three-phase CT is greater than y2% of the maximum phase current and y3% of the rated current A 额 If the sum of the two is exceeded, the CT disconnection will be reported after the delay time Q2; Reversely carry out the CT disconnection alarm judgment criterion inspection steps to verify whether the action criterion of the self-generated zero-sequence current of the three-phase CT is established when the CT disconnection is reported. If established, it is determined that the CT disconnection alarm judgment criterion is correct; If it is not established, it is determined that the CT disconnection alarm judgment criteria are wrong, and the CT disconnection alarm judgment criteria are adjusted; The above-mentioned test of over-limit alarm criteria of differential current between the measuring CT and the protection CT includes: Apply voltage V to the CT circuit 正 and current A 正 , and gradually increase the current based on the current step A0, and judge the maximum phase current of the measured CT. If the difference between the maximum phase current of the measured CT and the maximum phase current of the protection CT is greater than m1 times the maximum phase current of the measured CT, and the maximum phase current of the measured CT is greater than the rated current A 额 m2 times, the differential current over-limit alarm signal between the measuring CT and the protection CT is sent, and the signal is automatically returned after the abnormality disappears.

7. The method for testing the function of the intelligent transmitter according to claim 6, characterized in that: The numerical comparison of the DCS system, DEH system and RTU system includes: Apply power values ​​of z1%, z2%, z3%, z4% and z5% to the intelligent transmitter, and judge the values ​​of the DCS system, DEH system and RTU system under different power values ​​respectively. If the values ​​of the DCS system, DEH system and RTU system are consistent, it is determined that the intelligent transmitter is normal; If the values ​​of the DCS system, DEH system and RTU system are inconsistent, it is determined that there is an abnormality in the intelligent transmission device; The PT and CT switching test includes: Under the condition of full power range, PT and CT switching tests are performed and judged respectively. When the PT switching test is performed, if the power curves in the DCS system, DEH system and RTU system are continuous and uninterrupted and there is no abnormality in the screen, it is judged that the PT switching is normal; Otherwise, it is determined that there is an abnormality in PT switching; When conducting the CT switching test, if the power curves in the DCS system, DEH system and RTU system are continuous and uninterrupted and there is no abnormality in the screen, it is determined that the CT switching is normal; Otherwise, it is determined that there is an abnormality in CT switching.

8. A function inspection system for an intelligent transmitter, based on a function inspection method for an intelligent transmitter according to any one of claims 1 to 7, characterized in that: include, The data acquisition module is used to perform different checks on the dual power supply, PT circuit, CT circuit and power signal in the intelligent transmitter with the DCS system, DEH system and RTU system to obtain the status data of the components; A state comparison module is used to compare the state data with the corresponding state conditions to obtain the state of the component; The function verification module is used to obtain the function status of the intelligent transmitter according to the status of the components, so as to realize the function verification of the intelligent transmitter.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method for testing the function of an intelligent transmitter device according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of a method for testing the function of an intelligent transmitter device according to any one of claims 1 to 7 are implemented.

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