Main transformer load risk identification method based on main transformer load characteristics

Abstract

The invention discloses a main transformer load risk identification method based on main transformer load characteristics, and the method comprises the steps: regularly monitoring the load condition of a transformer, configuring a proper protection device, setting reasonable overload and short-circuit protection values, guaranteeing that a power supply can be rapidly cut off under an abnormal condition, preventing equipment from being damaged, and analyzing historical load data. The fluctuation rule and the abnormal condition of the load are identified, various factors causing the main transformer fault are identified by constructing a fault tree, and the occurrence probability and the influence degree of the factors are analyzed. Through regular inspection and maintenance and making of regular inspection and maintenance plans, good states of the transformer and accessory equipment thereof are ensured, risks caused by equipment aging or damage are reduced, insulation testing, conductivity testing and the like are carried out on the transformer, potential problems are found in time, and through emergency plan making, emergency plan making and accident handling processes, the safety of the transformer is improved. And measures can be taken quickly when the load is abnormal or the equipment fails, so that the loss is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power grids, and particularly to a method for identifying the load risk of a main transformer based on the load characteristics of the main transformer. Background Art

[0002] Transformers play a crucial role in the power system. The load capacity of the main transformer is usually determined by its rated capacity. When the transformer operates under the rated load, it can effectively convert the input high voltage into the output low voltage. The load types of the main transformer mainly include inductive loads, capacitive loads, and pure resistive loads. Inductive loads will cause the power factor to decrease, thereby affecting the effective load capacity of the transformer. Understanding the load characteristics of the main transformer helps to optimize the operation of the power system and improve the reliability and safety of power supply. In practical applications, monitoring and analyzing the load characteristics of the transformer are also important measures to ensure its long-term stable operation.

[0003] Some existing power grid transformer equipment, due to being in a heavy load or overloaded state for a long time, will accelerate the aging of components, reduce the service life of the equipment, and bring potential faults and operation risks to the power grid. Therefore, the treatment of heavy load and overload has always been an important part of the power grid operation and maintenance work. However, the workload of spot inspection and maintenance is relatively large. For overloaded transformers, maintenance personnel take corresponding measures after receiving an alarm, resulting in a relatively complex treatment method and low efficiency. Therefore, it is necessary to solve the above problems. Summary of the Invention

[0004] Based on the technical problems existing in the background art, the present invention proposes a method for identifying the load risk of a main transformer based on the load characteristics of the main transformer.

[0005] The method for identifying the load risk of a main transformer based on the load characteristics of the main transformer proposed by the present invention includes the following steps: Load Monitoring

[0006] Regularly monitor the load condition of the transformer, and obtain the load current, voltage, and power data of the transformer in real time by installing load monitoring instruments.

[0007] Temperature Monitoring

[0008] Monitor the oil temperature and winding temperature of the transformer through temperature sensors, and judge whether they are within the safe range.

[0009] Short Circuit and Overload Protection

[0010] Configure appropriate protection devices, set reasonable overload and short circuit protection values, and ensure that the power supply can be quickly cut off in case of abnormal conditions to prevent equipment damage.

[0011] Fault Tree Analysis

[0012] Use data analysis tools to analyze historical load data, identify the fluctuation patterns and abnormal conditions of the load, and identify various factors leading to the failure of the main transformer by constructing a fault tree, analyze their occurrence probabilities and impact degrees to find out the main risk sources;

[0013] Failure Mode and Effects Analysis

[0014] Analyze each component of the main transformer one by one, identify potential failure modes and their impacts on the system, and evaluate the severity and likelihood of failure.

[0015] Risk Matrix Method

[0016] By classifying the identified risks according to their occurrence frequencies and impact degrees, form a risk matrix to help decision-makers prioritize high-risk factors.

[0017] Historical Data Analysis

[0018] Collect and analyze the historical operation data and fault records of the main transformer, identify common fault types and their occurrence conditions to discover potential risks.

[0019] Load Prediction and Evaluation

[0020] Based on historical load data and load growth trends, conduct load prediction and evaluate the impact of future loads on the main transformer.

[0021] Preferably, by establishing a risk assessment model, comprehensively considering factors such as the operating environment of the transformer, load characteristics, equipment aging, etc., evaluate the possible risk levels, conduct failure mode and effects analysis, and identify potential failure modes of the transformer under different load conditions.

[0022] Furthermore, through simulation and modeling, use computer simulation technology to simulate the performance of the main transformer under different loads and operating conditions to identify possible risk points.

[0023] Preferably, through a monitoring and early warning system, establish a real-time monitoring system to monitor key parameters such as the temperature, vibration, and oil level of the transformer, and promptly discover abnormal situations and give early warnings.

[0024] Furthermore, through regular inspections and maintenance, formulate regular inspection and maintenance plans to ensure the good condition of the transformer and its auxiliary equipment, reduce risks caused by equipment aging or damage, conduct insulation tests, conductivity tests, etc. on the transformer, and promptly discover potential problems.

[0025] Preferably, through an emergency plan, formulate an emergency plan and accident handling procedures to ensure that measures can be taken promptly in case of abnormal loads or equipment failures to reduce losses.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1. Collect and analyze the historical operation data and fault records of the main transformer, identify common fault types and their occurrence conditions, so as to discover potential risks. Based on the historical load data and load growth trend, conduct load forecasting and evaluate the impact of future loads on the main transformer.

[0028] 2. By establishing a risk assessment model, comprehensively consider factors such as the operating environment of the transformer, load characteristics, equipment aging, etc., evaluate the possible risk levels, conduct fault mode and effect analysis, identify potential fault modes of the transformer under different load conditions. Through simulation and modeling, use computer simulation technology to simulate the performance of the main transformer under different loads and operating conditions, and identify possible risk points. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the detection process of the main transformer load risk identification method based on the load characteristics of the main transformer proposed by the present invention;

[0030] Figure 2 It is a schematic diagram of the processing process of the main transformer load risk identification method based on the load characteristics of the main transformer proposed by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0032] Refer to Figure 1, A method for identifying the load risk of a main transformer based on the load characteristics of the main transformer, including the following steps: Regularly monitor the load condition of the transformer. By installing load monitoring instruments, obtain the load current, voltage, and power data of the transformer in real-time. Monitor the load current of the transformer, compare the relationship between the actual load and the rated load of the transformer. Use temperature sensors to monitor the temperature of the transformer. If the temperature exceeds the safe range, there may be an overload risk. Monitor the oil temperature and winding temperature of the transformer through temperature sensors, and judge whether they are within the safe range. Configure appropriate protection devices, set reasonable overload and short-circuit protection values, ensure that the power supply can be quickly cut off in case of abnormal conditions, and prevent equipment damage. Use data analysis tools to analyze historical load data, identify the fluctuation laws and abnormal conditions of the load. By constructing a fault tree, identify various factors that cause the failure of the main transformer, analyze their occurrence probabilities and influence degrees, so as to find out the main risk sources. Analyze each component of the main transformer one by one, identify potential failure modes and their impacts on the system, and evaluate the severity and possibility of failure. By classifying the identified risks according to the occurrence frequency and influence degree, form a risk matrix to help decision-makers prioritize high-risk factors. Collect and analyze the historical operation data and fault records of the main transformer, identify common fault types and their occurrence conditions, so as to discover potential risks. Based on historical load data and load growth trends, conduct load forecasting and evaluate the impact of future loads on the main transformer.

[0033] Refer to Figure 2 , By establishing a risk assessment model, comprehensively consider factors such as the operating environment, load characteristics, and equipment aging of the transformer, evaluate the possible risk levels, conduct failure mode and effect analysis, identify potential failure modes of the transformer under different load conditions, evaluate the humidity, temperature, and pollution degree of the environment where the transformer is located, regularly check the cleanliness and ventilation of the outside of the transformer, monitor the current of the three-phase load, ensure that the load is evenly distributed among the three phases, and avoid serious imbalance. Regularly conduct chemical analysis of insulating oil and insulation resistance testing to evaluate the insulation status of the transformer, using methods such as partial discharge testing and dielectric loss factor testing.

[0034] In the present invention, through simulation and modeling, using computer simulation technology, simulate the performance of the main transformer under different loads and operating conditions, and identify possible risk points.

[0035] Through a monitoring and early warning system, establish a real-time monitoring system to monitor key parameters such as the temperature, vibration, and oil level of the transformer, and promptly discover abnormal conditions and give early warnings.

[0036] In the present invention, through regular inspections and maintenance, a regular inspection and maintenance plan is formulated to ensure the good condition of the transformer and its auxiliary equipment, reduce the risks caused by equipment aging or damage, conduct insulation tests, conductivity tests, etc. on the transformer, promptly detect potential problems, record the maintenance history, and ensure that all equipment is inspected and maintained on time.

[0037] Through an emergency plan, an emergency plan and an accident handling process are formulated to ensure that measures can be taken promptly in case of abnormal load or equipment failure to reduce losses.

[0038] As mentioned above, the above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A main transformer load risk identification method based on main transformer load characteristics, characterized in that: The following steps are involved: S1: Load monitoring Regularly monitor the load of the transformer and obtain the load current, voltage and power data of the transformer in real time by installing load monitoring instruments; S2: Temperature monitoring Monitor the oil temperature and winding temperature of the transformer through temperature sensors to determine whether they are within the safe range; S3: Short circuit and overload protection Configure appropriate protection devices and set reasonable overload and short-circuit protection values ​​to ensure that the power supply can be quickly cut off in abnormal situations to prevent equipment damage; S4: Fault Tree Analysis Use data analysis tools to analyze historical load data, identify load fluctuation patterns and abnormal conditions, and build a fault tree to identify the various factors that lead to main transformer failures, analyze their probability of occurrence and impact, and find out the main risk sources; S5: Failure Mode and Effects Analysis Each component of the main transformer is analyzed one by one to identify potential failure modes and their impact on the system, and to assess the severity and likelihood of failure. S6: Risk Matrix Approach By classifying the identified risks according to frequency of occurrence and impact, a risk matrix is ​​formed to help decision makers prioritize high-risk factors; S7: Historical data analysis Collect and analyze historical operating data and fault records of main transformers, identify common fault types and their occurrence conditions, and thus discover potential risks; S8: Load Forecasting and Assessment Based on historical load data and load growth trends, load forecasting is performed to assess the impact of future load on the main transformer.

2. The main transformer load risk identification method based on the main transformer load characteristics according to claim 1 is characterized in that: By establishing a risk assessment model, comprehensively considering factors such as the transformer's operating environment, load characteristics, equipment aging, etc., the possible risk level is evaluated, and a failure mode and effect analysis is performed to identify the potential failure modes of the transformer under different load conditions.

3. The main transformer load risk identification method based on the main transformer load characteristics according to claim 2 is characterized in that: Through simulation and modeling, computer simulation technology is used to simulate the performance of the main transformer under different loads and operating conditions to identify possible risk points.

4. The main transformer load risk identification method based on the main transformer load characteristics according to claim 3 is characterized in that: Through the monitoring and early warning system, a real-time monitoring system is established to monitor key parameters such as temperature, vibration, oil level, etc. of the transformer, so as to detect abnormal conditions and issue early warnings in a timely manner.

5. The main transformer load risk identification method based on the main transformer load characteristics according to claim 4 is characterized in that: Through regular inspection and maintenance, formulate regular inspection and maintenance plans to ensure the good condition of the transformer and its ancillary equipment, reduce the risks caused by equipment aging or damage, conduct insulation tests and conductivity tests on the transformer, and detect potential problems in time.

6. The main transformer load risk identification method based on the main transformer load characteristics according to claim 5 is characterized in that: Through emergency plans, emergency plans and accident handling procedures are formulated to ensure that measures can be taken quickly to reduce losses when load abnormalities or equipment failures occur.

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