Land joint debugging test method for large marine power system
Through distributed sensors and high-precision acquisition systems, online monitoring and real-time analysis of large marine power systems are realized, and the accuracy problems caused by manual recording of data are solved, and efficient and accurate joint debugging tests of the power system are realized.
Patent Information
- Application Number
- CN202411585109.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-02-11
AI Technical Summary
At this stage, the joint commissioning test of large marine power systems relies on manual recording of data, resulting in large amounts of data, large workloads and the inability to ensure the accuracy of the results.
Through distributed arrangement of sensors and integrating high-precision acquisition systems, online network monitoring and real-time analysis of test power system test data, and through the comparison of self-acquisition data with test system data, data compliance judgment and fault point judgment are given through the comparison of self-acquisition data with test system data, data compliance judgment and fault point judgment are given .
Real-time monitoring of various parameters of large marine power systems and accurate judgment of fault points are achieved, which reduces human errors, saves test costs, and shortens the joint debugging test cycle.
Smart Images
Figure CN119414129A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of ship power system testing, and in particular to a land joint debugging test method for a large ship power system. Background Art
[0002] Large-scale ship power systems generally require onshore joint commissioning tests to verify independent power generation and distribution functions. At present, the joint commissioning test of ship power systems uses manual recording of process data and result judgment. The amount of data recorded by on-site personnel is large, the workload is heavy, and human subjective judgment cannot guarantee the accuracy of the results. Summary of the invention
[0003] In view of the above problems, a large-scale marine power system onshore joint commissioning test method is proposed. Through the distributed arrangement of sensors, high-precision acquisition system data is integrated, and the data of the tested power system is monitored online through the network, so as to realize real-time analysis of the tested power system test data and store records. By comparing the self-collected data with the tested system data, the eligibility judgment of the tested power system data is given, and if the data is incorrect, the fault point judgment is given.
[0004] The technical solution of the present invention is: a method for testing onshore joint debugging of large-scale marine power systems, wherein a central processing human-computer interaction unit collects sensor signals distributedly arranged at each node of the tested power system-related equipment and the test site through its own system, and forms digital data as a standard source through algorithm processing, while online monitoring the internal operation interaction data of the tested power system itself; the above-mentioned self-collected data and the monitoring data are compared and analyzed in real time to determine the correctness of the collected data of the tested power system; the correctness of the collected electrical and thermal parameters of the tested power system is determined by making a difference and suggestions are given; the correctness of the power distribution adjustment of the tested power system is determined by the dynamic adjustment relationship between the power distribution difference of the power system units and the speed and voltage of the units and corresponding suggestions are given; and the fault points of the power system are determined and suggestions are given by analyzing the online monitoring data of multiple locations.
[0005] Furthermore, the central processing human-computer interaction unit collects data through its own system, including: collecting current, voltage electrical parameter signals and unit speed parameter signals of the tested power system and temperature and pressure parameter signals of oil, gas, water and electricity pipelines of the test site system through signal acquisition devices dispersedly arranged at each node of the tested power system and each node of the field test system; the signal acquisition device uploads the processed digital data to the central processing human-computer interaction unit through Ethernet, and the above-mentioned processed digital data is used as a standard signal for comparison and calculation.
[0006] Furthermore, the central processing human-computer interaction unit is equipped with three or more sets of mutual inductors and sensors of the same model for collection in its own system collection; the signal collection device collects signals of three or more sets of sensors of the same model arranged at the same node, and confirms the collected data by comparing and eliminating the signals of multiple sensors; the same signal is collected and processed by two or more sets of signal collection devices to form more than two sets of collected data, and the signal collection device then compares and compares the collected data to confirm the final digital data and uploads it to the central processing human-computer interaction unit; the above signals are used as standard signals for comparison and calculation, and the signal collection device monitors the faults of each sensor and uploads them to the central human-computer interaction unit at the same time; all non-faulty sensors are running on the network, and the dismantling and inspection of faulty sensors does not affect the operation of the system.
[0007] Furthermore, the test power system is divided into three levels for data monitoring. The first level is that the test acquisition equipment directly collects sensor signals and communicates them to the upper power monitoring system; the second level is that the power monitoring system collects all parameters and then summarizes them and communicates them to the test power system control device; the third level is that all parameters of the test power system control device are communicated to the upper platform network; the central processing human-computer interaction unit simultaneously monitors the three levels of data of the test power system online.
[0008] Furthermore, the central processing human-computer interaction unit centrally displays the data collected by its own test system, the data of the online monitoring of the tested power system, the data of each security system in the test site, and the fault alarm prompts of each node in the system; the central processing human-computer interaction unit stores the data involved in the database and performs historical callback queries; the central processing human-computer interaction unit performs real-time security monitoring and delayed action on the data of each node of the tested power system as backup protection for the tested system.
[0009] The beneficial effects of the present invention are as follows: the onshore joint debugging test method for a large-scale ship power system of the present invention fills the blank of the test system for a large-scale ship power system, and realizes the real-time monitoring and early warning of various parameters of the power system. The correctness of the data of the tested power system can be displayed in real time, and the fuzzy confirmation function of the fault point of the power system is provided. The application of this test can greatly save the test cost, significantly shorten the test cycle of the power system joint debugging, assist in judging the correctness of the data of the tested system, and avoid inaccurate human judgment. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the structure of the power system test system of the present invention;
[0011] Figure 2 This is a schematic diagram of the reliable, accurate and high-precision data acquisition and processing structure of the present invention;
[0012] Figure 3 Schematic diagram of the data comparison processing structure of the present invention. DETAILED DESCRIPTION
[0013] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.
[0014] The present invention proposes a test method for onshore joint debugging of a large-scale marine power system. The method integrates data acquisition, judgment and analysis, and human-computer interaction, and can achieve the following functions:
[0015] 1. Collect electrical and thermal parameters of the tested power system and test site through distributed high-precision acquisition;
[0016] 2. The reliable and accurate data collection is achieved through the arrangement of multiple sensors of the same model and redundant processing methods, and the sensor can be dismantled, repaired, and inspected without stopping the test system;
[0017] 3. Monitor the internal operation data of the power system through online monitoring;
[0018] 4. During the power system test, the power system test data is compared with the standard collected data to determine the correctness of the data and assist in determining the fuzzy fault points of the tested system;
[0019] 5. Through integrated interactive display.
[0020] The method of the present invention collects various electrical and thermal parameters of the power system through standard high-precision sensors distributed at various points of the power system, and uploads them to the central processing module through a signal acquisition device for centralized processing and interactive display. The central processing module monitors the power system's own collected data online through Ethernet, CAN, RS-485 and other communication forms, and centrally processes and interactively displays them. The central processing module collects the signals of each node of the tested power system and each node of the test site system through its own system and processes them into accurate standard digital data through algorithms, and compares and analyzes the data of the internal operation of the tested power system itself monitored online to determine the correctness of the collected data of the tested power system. The correctness of the collected electrical, thermal and other parameters of the tested power system is judged by making a difference and suggestions are given; the correctness of the power distribution adjustment of the tested power system is judged by the relationship between the power distribution difference of the power system unit and the speed of the unit and corresponding suggestions are given; the fault point of the tested power system is judged and suggestions are given through the analysis of multi-position online monitoring data. Central processing and centralized interactive display are performed through the central processing module.
[0021] The present invention carries out research and implementation of a method for testing a marine power system.
[0022] (1) Power system test system
[0023] like Figure 1 The central processing human-machine interaction unit shown in the figure directly collects various thermal parameters of the unit, such as lubricating oil temperature, cooling water temperature, lubricating oil pressure, high and low temperature cooling water pressure, etc., through the thermal parameter sensors arranged on the unit. The human-machine interaction unit monitors and protects the unit through the collected thermal parameters. The monitoring protection is set with a delay, which is slightly longer than the action time of the monitoring protection of the tested unit itself. This function serves as a backup protection for the unit's own security function. In the case of failure of the unit's own monitoring, the delay provides the unit with related backup protection functions such as alarm and shutdown, thereby ensuring the safety of the tested unit. At the same time, the monitoring protection alarm point processed by the human-machine interaction unit serves as a standard signal for subsequent fault judgment.
[0024] The signal acquisition device directly collects the current and voltage signals at the output end of the generator set through the current and voltage transformers dispersedly arranged in the power system under test, directly collects the speed signal of the generator set through the photoelectric sensor, and collects the temperature, pressure and electrical parameter signals of the oil, gas, water and electricity pipelines of the power system under test operation guarantee system through PT100 and pressure sensors. The signal acquisition device processes the collected parameters of the power system under test and converts them into digital signals and uploads them to the central processing human-computer interaction unit through Ethernet. In order to ensure the precision and accuracy of the signal, the signal acquisition device and the central processing human-computer interaction unit are connected through the following methods: Figure 2 The processing method shown is used for processing; the central processing human-computer interaction unit collects and processes signals similarly to the signal acquisition device. The following takes the signal acquisition device collecting and processing current signals as an example to illustrate the method of high-precision acquisition processing. In order to ensure the reliability and high precision of the signal, three sets of all acquisition sensors are set. The signal acquisition device collects the signals of three sets of current transformers, first removes the highest and lowest values and retains the middle value as the accepted data; if a sensor signal is lost or a sensor signal deviates from the average value of the other two sensors (the signal value is close), the signal with a large deviation (settable) is removed, and the average value of the two close sensor values is taken as the accepted data; if the sensor is disconnected, the sensor signal is removed and an alarm is issued. Signal acquisition device 1 transfers the corresponding sensor electrical signal to signal acquisition device 2. Signal acquisition device 2 obtains the acceptance signal ' according to the above signal processing flow and transmits it to signal acquisition device 1; signal acquisition device 1 compares the acceptance signal ' transmitted by signal acquisition device 2 with the acceptance signal processed by itself, and after confirming that the phase difference value (which can be set) is small, takes the average value of the two acceptance signals as the final standard signal of the signal, and transmits it to the central processing human-computer interaction unit via Ethernet. All acquisition devices and sensors need to be inspected. If any one of the three sets of sensors is taken out for inspection, the system can still operate.
[0025] The central processing human-machine interaction unit monitors the unit thermal parameters (such as lubricating oil temperature, cooling water temperature, lubricating oil pressure, high and low temperature cooling water pressure, etc.) and alarm signals uploaded to the power monitoring system by the test acquisition equipment online through RS485 communication. The parameters and alarm signals are used as input signals for comparison and displayed in real time on the human-machine interaction unit. The central processing human-machine interaction unit monitors the electrical signals and command signals (such as unit and grid voltage, current, frequency signals, acceleration and deceleration, voltage increase and decrease commands, etc.) collected and processed by the distribution board and the power monitoring system online through CAN network communication. The signals are used as input signals for comparison and displayed in real time on the human-machine interaction unit. The central processing human-machine interaction unit monitors all power system-related signals of the test power system centralized control console online through Ethernet communication, and the signals are used as input signals for comparison.
[0026] The central processing human-computer interaction unit displays the parameters of each point of the power system collected in real time and at high speed on the human-computer interaction unit. The central processing human-computer interaction unit displays the data of each point of the tested power system monitored online on the human-computer interaction unit in real time. The background performs power quality analysis of the power system every 10 seconds and displays the power quality analysis results in real time. The central processing human-computer interaction unit compares and analyzes the standard signal data collected and processed by its own test system with the input signal data of the tested power system monitored online, and forms a corresponding report to be displayed in real time on the interactive interface.
[0027] (2) Data comparison and analysis
[0028] like Figure 3 The data processing structure diagram shown is as follows:
[0029] The test power system is divided into three levels for data monitoring. The first level is that the test acquisition equipment directly collects sensor signals and communicates them to the upper power monitoring system (the central processing human-computer interaction unit is also online for monitoring). The second level is that the power monitoring system collects all parameters and then summarizes them and communicates them to the test power system control device (the central processing human-computer interaction unit is also online for monitoring). The third level is that all parameters of the test power system control device are communicated to the upper platform network (the central processing human-computer interaction unit is also online for monitoring).
[0030] The parameters collected by the central processing human-computer interaction unit are subtracted from the parameters collected by the tested power system, and the absolute value of the difference is compared with the allowable band difference. According to the comparison result, it is judged whether the collected and processed parameters of the tested power system meet the requirements. At this time, the data collected and processed by the central processing human-computer interaction unit is used as the standard source. The following voltage is used as an example for the collected parameters:
[0031] |U ab中 -U ab电 |≤U 允差
[0032] Among them U ab中 Collect A and B phase voltages for the central processing human-computer interaction unit; U ab电 Collect the A and B phase voltages for the tested power system; U 允差 The tolerance value is set according to the accuracy requirements of the power system under test.
[0033] If the above formula is true, the output is 1 (yes), otherwise it is 0 (no). The analog quantity is directly calculated according to the above formula. The general output result of the alarm signal is 1 for alarm, and 0 for no alarm; for the comparison of the alarm signal, the tolerance value is set to 0. That is, if the above formula is true, the central processing human-computer interaction unit and the tested power system collect data and the alarm is the same, and the output is 1 (yes), otherwise it is 0 (no).
[0034] 1) The data of the central processing human-computer interaction unit is compared with the test acquisition device; according to the above formula, each parameter is compared item by item. If a parameter (such as U bc ) output result is 0, then the output is "Electrical acquisition equipment failure, please check U bc Phase voltage acquisition channel and tested acquisition equipment are debugged". After all parameters are compared, if the internal calculation results are all 1, go to the next step;
[0035] 2) Compare the data of the central processing human-computer interaction unit with the data of the tested distribution board and the power monitoring system; compare the parameters one by one according to the above method. If a certain parameter (such as I a ) output result is 0, then the output is "Distribution board, power monitoring equipment failure, please check I a Phase current communication signal and debug". After all parameters are compared, if the internal calculation results are all 1, go to the next step;
[0036] 3) The data of the central processing human-computer interaction unit is compared with the data of the tested power system; each parameter is compared item by item according to the above method. If the output result of a certain parameter (such as the high lubricating oil temperature alarm) is 0, the output is "the power system centralized control equipment is faulty, please check the high lubricating oil temperature alarm communication signal and debug it". After the comparison of each parameter is completed, if the internal calculation results are all 1, the output is "satisfied".
[0037] Parallel operation of units in the power system: Analyze the eligibility of parallel operation according to the manual, semi-automatic and above modes of the power system. The manual mode parallel operation status is determined by the speed and voltage regulation characteristics of the unit itself, and the semi-automatic and above modes are automatic frequency and voltage regulation and work balancing by the power monitoring device. The specific methods are as follows:
[0038] 1) Manual state: Calculate the distribution difference of each unit according to the following formula;
[0039]
[0040] Where: ΔP i The power distribution difference of the i-th unit in the grid; P i The actual load power of the i-th unit in the grid, kW; P ei Rated power of the i-th unit on the grid, kW.
[0041] Calculate the power distribution difference of each grid-connected unit separately. i |>Tolerance band, output "The distribution difference exceeds the standard, please check the unit characteristics."
[0042] 2) Semi-automatic and above: Calculate the power distribution difference of each on-grid unit respectively. When the ith unit ΔP i >0, real-time acquisition of unit speed and continuous storage array, when the speed array is on an upward trend, output "please pay attention to the power of the i-th unit, please reduce speed and check the unit frequency regulation device"; when the i-th unit ΔP i <0, real-time acquisition of unit speed and continuous storage array, when the speed array is in a downward trend, output "Please pay attention to the power of the i-th unit, please increase the speed and check the unit frequency regulation device". If the value is greater than 1, the output is "Please pay attention to the system power and pay attention to load reduction." The rest of the state is the normal adjustment state. Voltage regulation is similar to frequency regulation and is set according to the above frequency regulation state.
[0043] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.
Claims
1. A method for testing a large-scale marine power system onshore joint debugging test, characterized in that: The central processing human-computer interaction unit collects the sensor signals distributed in the relevant equipment of the tested power system and each node of the test site through its own system, and forms digital data as the standard source through algorithm processing. At the same time, it monitors the internal operation interaction data of the tested power system itself online; it compares and analyzes the above self-collected data with the monitoring data in real time to determine the correctness of the collected data of the tested power system; it determines the correctness of the collected electrical and thermal parameters of the tested power system by making a difference and gives suggestions; The correctness of the power distribution adjustment of the power system under test is judged and corresponding suggestions are given through the dynamic adjustment relationship between the power distribution difference of the power system units and the speed and voltage of the units; the fault points of the power system are judged and suggestions are given through the analysis of multi-location online monitoring data.
2. According to claim 1, the onshore joint debugging test method for a large-scale marine power system is characterized in that: The central processing human-computer interaction unit collects data through its own system, including: collecting the current, voltage electrical parameter signals and unit speed parameter signals of the tested power system and the temperature and pressure parameter signals of the oil, gas, water and electricity pipelines of the test site system through signal acquisition devices dispersedly arranged at each node of the tested power system and each node of the field test system; the signal acquisition device uploads the processed digital data to the central processing human-computer interaction unit through Ethernet, and the above-mentioned processed digital data is used as a standard signal for comparison and calculation.
3. According to claim 2, the onshore joint debugging test method for a large-scale marine power system is characterized in that: The central processing human-machine interaction unit is equipped with three or more sets of mutual inductors and sensors of the same model for collection in its own system collection; the signal collection device collects signals of three or more sets of sensors of the same model arranged at the same node, and confirms the collected data by comparing and eliminating the signals of multiple sensors; the same signal is collected and processed by two or more sets of signal collection devices to form more than two sets of collected data, and the signal collection device then compares and compares the collected data to confirm the final digital data and uploads it to the central processing human-machine interaction unit; the above signals are used as standard signals for comparison and calculation, and the signal collection device monitors the faults of each sensor and uploads them to the central human-machine interaction unit at the same time; all non-faulty sensors are running on the network, and the dismantling and inspection of faulty sensors will not affect the operation of the system.
4. According to claim 2, the onshore joint debugging test method for a large-scale marine power system is characterized in that: The test power system is divided into three levels to monitor data. The first level is that the test acquisition equipment directly collects sensor signals and communicates them to the upper power monitoring system; The second level is that the power monitoring system collects all parameters, summarizes them and communicates them to the central control device of the power system under test; the third level is that all parameters of the central control device of the power system under test are communicated to the upper platform network; the central processing human-computer interaction unit simultaneously monitors the three levels of data of the power system under test online.
5. According to claim 1, the onshore joint debugging test method for a large-scale marine power system is characterized in that: The central processing human-computer interaction unit centrally displays the data collected by its own test system, the online monitoring data of the tested power system, the data of each support system in the test site, and the fault alarm prompts of each node in the system; the central processing human-computer interaction unit stores the data involved in the database and performs historical callback queries; the central processing human-computer interaction unit performs real-time security monitoring and delayed action on the data of each node of the tested power system as backup protection for the tested system.