Power insulation equipment state evaluation method and system based on stability analysis
By collecting current and temperature data from electrical insulation equipment, calculating insulation coefficient and rate, and combining multiple indicators for comprehensive evaluation, the shortcomings of existing electrical insulation equipment condition detection technologies are solved, enabling accurate assessment of equipment condition and fault alarm.
Patent Information
- Application Number
- CN202511523672.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-23
- Publication Date
- 2026-02-17
AI Technical Summary
Existing technologies lack effective means of detecting electrical insulation equipment, resulting in an inability to understand its insulation status in a timely and accurate manner, which affects the safety and reliability of the equipment.
By collecting the start-end current, end-end current, and body temperature of the power insulation equipment, the insulation coefficient and insulation rate are calculated. A comprehensive evaluation is then conducted by combining multiple indicators, and the status assessment is achieved using signal acquisition, storage, control processing, and alarm units.
It enables accurate and comprehensive assessment of the status of electrical insulation equipment, ensuring reliable operation of the equipment and providing timely alarms in case of faults.
Smart Images
Figure CN121541005A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of power detection technology, and specifically relates to a method and system for assessing the condition of power insulation equipment based on stability analysis. Background Technology
[0002] With the continuous expansion of power systems, the use of power equipment is becoming increasingly widespread and diversified. To ensure the safe use of power equipment, various insulation devices are used for safety insulation treatment. However, if the insulation devices malfunction, it will not only create safety hazards but also affect the reliable operation of the corresponding equipment. Current technology lacks testing equipment for the insulation devices used in power systems. Therefore, it is best to conduct condition assessments of the power insulation devices in use to accurately and promptly understand their actual insulation status.
[0003] This invention proposes a method and system for assessing the condition of power insulation equipment based on stability analysis. The method calculates the relevant insulation coefficient and insulation rate based on the collected data of the first-end current, the last-end current, and the body temperature of the power insulation equipment. Furthermore, the method combines the first-end current, the last-end current, the insulation coefficient, and the insulation rate to comprehensively assess the condition of the power insulation equipment, ensuring the accuracy and comprehensiveness of the assessment, and thus ensuring its reliable and effective operation. Summary of the Invention
[0004] This invention provides a method and system for assessing the condition of electrical insulation equipment based on stability analysis, which can accurately and comprehensively assess the condition of electrical insulation equipment, thereby ensuring its reliable and effective operation.
[0005] This invention specifically relates to a method for assessing the condition of electrical insulation equipment based on stability analysis. The method includes the following steps:
[0006] Step (1): Collect the current at the beginning and end of the power insulation equipment and the temperature of the main body;
[0007] Step (2): Make a preliminary assessment of the status of the power insulation equipment based on the first-end current and the last-end current;
[0008] Step (3): Calculate the insulation coefficient of the power insulation equipment;
[0009] Step (4): Evaluate and judge the condition of the power insulation equipment based on the insulation coefficient;
[0010] Step (5): Calculate the insulation rate of the power insulation equipment;
[0011] Step (6): Evaluate and judge the status of the power insulation equipment based on the insulation rate.
[0012] Furthermore, the specific method for making a preliminary assessment of the state of the power insulation equipment based on the first-end current and the last-end current in step (2) is as follows:
[0013] (21) Determine whether the terminal current is greater than the terminal current reference value. If yes, proceed to step (22); if no, proceed to step (23).
[0014] (22) Calculate the ratio of the end current to the beginning current, and determine whether the ratio of the end current to the beginning current is greater than the reference value of the ratio of the end current to the beginning current. If it is, the power insulation equipment is in very poor condition; if not, the power insulation equipment is in poor condition.
[0015] (23) Calculate the ratio of the end current to the beginning current, and determine whether the ratio of the end current to the beginning current is greater than the reference value of the ratio of the end current to the beginning current. If yes, the power insulation equipment is in poor condition; if not, proceed to step (3) for further analysis and judgment.
[0016] Furthermore, the specific method for calculating the insulation coefficient of the power insulation equipment in step (3) is as follows:
[0017]
[0018] Where F is the body temperature, F N I1 is the rated temperature of the main body, I2 is the current at the beginning, I2 is the current at the end, and A is the cross-sectional area of the power insulation equipment.
[0019] Furthermore, the specific method for evaluating and judging the state of the power insulation equipment based on the insulation coefficient in step (4) is as follows:
[0020] Determine whether the above insulation coefficient is greater than the insulation coefficient reference value. If yes, the power insulation equipment is in poor condition; otherwise, proceed to step (5).
[0021] Furthermore, the specific algorithm for calculating the insulation rate of the power insulation equipment in step (5) is as follows:
[0022]
[0023] Where Δt is the sampling interval time.
[0024] Furthermore, the specific method for evaluating and judging the state of the power insulation equipment based on the insulation rate in step (6) is as follows:
[0025] Determine whether the insulation rate is less than the insulation rate reference value. If yes, the electrical insulation equipment is in normal condition; otherwise, the electrical insulation equipment is in good condition.
[0026] Furthermore, the present invention also proposes a power insulation equipment condition assessment system based on stability analysis, wherein the power insulation equipment condition assessment system includes a signal acquisition unit, a storage unit, a control processing unit, and an alarm unit.
[0027] Furthermore, the acquisition unit acquires the operating information of the power insulation equipment, including the start-end current, end-end current, and body temperature; the storage unit stores the information acquired by the acquisition unit.
[0028] Furthermore, the control processing unit evaluates and judges the condition of the power insulation equipment, specifically as follows:
[0029] A preliminary assessment of the status of the power insulation equipment is made based on the first-end current and the last-end current.
[0030] Calculate the insulation coefficient of the electrical insulation equipment;
[0031] The condition of the power insulation equipment is evaluated and judged based on the insulation coefficient.
[0032] Calculate the insulation rate of the electrical insulation equipment;
[0033] The condition of the power insulation equipment is evaluated and judged based on the insulation rate.
[0034] The alarm unit will issue an alarm in a timely manner when there is a fault in the power cable.
[0035] Compared with existing technologies, the beneficial effects are: the power insulation equipment condition assessment method collects the first-end current, the last-end current, and the body temperature of the power insulation equipment, and calculates the relevant insulation coefficient and insulation rate. Furthermore, it combines the first-end current, the last-end current, the insulation coefficient, and the insulation rate to comprehensively assess the condition of the power insulation equipment, ensuring the accuracy and comprehensiveness of the assessment. Attached Figure Description
[0036] Figure 1 This is a flowchart illustrating the process of a stability analysis-based method for assessing the condition of electrical insulation equipment according to the present invention. Detailed Implementation
[0037] The following detailed description, in conjunction with the accompanying drawings, illustrates a specific implementation method and system for assessing the condition of power insulation equipment based on stability analysis, according to the present invention.
[0038] like Figure 1 As shown, the power insulation equipment condition assessment method of the present invention includes the following steps:
[0039] Step (1): Collect the current at the beginning and end of the power insulation equipment and the temperature of the main body;
[0040] Step (2): Make a preliminary assessment of the status of the power insulation equipment based on the first-end current and the last-end current;
[0041] Step (3): Calculate the insulation coefficient of the power insulation equipment;
[0042] Step (4): Evaluate and judge the condition of the power insulation equipment based on the insulation coefficient;
[0043] Step (5): Calculate the insulation rate of the power insulation equipment;
[0044] Step (6): Evaluate and judge the status of the power insulation equipment based on the insulation rate.
[0045] The ratio of the initial current to the final current clearly and directly reflects the condition of the power insulation equipment. Therefore, the specific method for making a preliminary assessment of the condition of the power insulation equipment based on the initial current and the final current in step (2) is as follows:
[0046] (21) Determine whether the terminal current is greater than the terminal current reference value. If yes, proceed to step (22); if no, proceed to step (23).
[0047] (22) Calculate the ratio of the end current to the beginning current, and determine whether the ratio of the end current to the beginning current is greater than the reference value of the ratio of the end current to the beginning current. If it is, the power insulation equipment is in very poor condition; if not, the power insulation equipment is in poor condition.
[0048] (23) Calculate the ratio of the end current to the beginning current, and determine whether the ratio of the end current to the beginning current is greater than the reference value of the ratio of the end current to the beginning current. If yes, the power insulation equipment is in poor condition; if not, proceed to step (3) for further analysis and judgment.
[0049] The insulation coefficient of electrical insulation equipment is affected by the temperature of the equipment itself. Therefore, the specific method for calculating the insulation coefficient of the electrical insulation equipment in step (3) is as follows:
[0050]
[0051] Where F is the body temperature, F N I1 is the rated temperature of the main body, I2 is the current at the beginning, I2 is the current at the end, and A is the cross-sectional area of the power insulation equipment.
[0052] The specific method for evaluating the status of the power insulation equipment based on the insulation coefficient in step (4) is as follows:
[0053] Determine whether the above insulation coefficient is greater than the insulation coefficient reference value. If yes, the power insulation equipment is in poor condition; otherwise, proceed to step (5).
[0054] The specific algorithm for calculating the insulation rate of the power insulation equipment in step (5) is as follows:
[0055]
[0056] Where Δt is the sampling interval time.
[0057] The specific method for evaluating and judging the state of the power insulation equipment based on the insulation rate in step (6) is as follows:
[0058] Determine whether the insulation rate is less than the insulation rate reference value. If yes, the electrical insulation equipment is in normal condition; otherwise, the electrical insulation equipment is in good condition.
[0059] This invention also proposes a power insulation equipment condition assessment system based on stability analysis. The power insulation equipment condition assessment system includes a signal acquisition unit, a storage unit, a control processing unit, and an alarm unit. The power insulation equipment condition assessment method described above assesses the condition of the power insulation equipment based on the acquired information.
[0060] The acquisition unit acquires the operating information of the power insulation equipment, including the start-end current, end-end current, and body temperature; the storage unit stores the information acquired by the acquisition unit.
[0061] The control processing unit assesses and judges the condition of the power insulation equipment, specifically as follows:
[0062] A preliminary assessment of the status of the power insulation equipment is made based on the first-end current and the last-end current.
[0063] Calculate the insulation coefficient of the electrical insulation equipment;
[0064] The condition of the power insulation equipment is evaluated and judged based on the insulation coefficient.
[0065] Calculate the insulation rate of the electrical insulation equipment;
[0066] The condition of the power insulation equipment is evaluated and judged based on the insulation rate.
[0067] The alarm unit will issue an alarm in a timely manner when there is a fault in the power cable.
[0068] Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention and not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific embodiments of the present invention, but such modifications or alterations are all within the scope of protection of the pending claims.
Claims
1. A method for condition assessment of power insulating equipment based on stability analysis, characterized by, The power insulation equipment state evaluation method comprises the following steps: Step (1): collecting the first-end current, the end current and the body temperature of the power insulation equipment; Step (2): preliminarily evaluating and judging the state of the power insulation equipment according to the first-end current and the end current; Step (3): calculating the insulation coefficient of the power insulation equipment; Step (4): evaluating and judging the state of the power insulation equipment according to the insulation coefficient; Step (5): calculating the insulation rate of the power insulation equipment; Step (6): evaluating and judging the state of the power insulation equipment according to the insulation rate.
2. The power insulation equipment state evaluation method based on stability analysis according to claim 1, characterized by, The specific method for preliminarily evaluating and judging the state of the power insulation equipment according to the first-end current and the end current in step (2) is as follows: (21) judging whether the end current is greater than the end current reference value, if yes, entering step (22); if not, entering step (23); (22) calculating the ratio of the end current to the first-end current, judging whether the end current-first-end current ratio is greater than the end current-first-end current ratio reference value, if yes, the state of the power insulation equipment is very poor; if not, the state of the power insulation equipment is poor; (23) calculating the ratio of the end current to the first-end current, judging whether the end current-first-end current ratio is greater than the end current-first-end current ratio reference value, if yes, the state of the power insulation equipment is poor; if not, entering step (3) for further analysis and judgment.
3. The power insulation equipment condition assessment method based on stability analysis according to claim 2, characterized in that, The specific method for calculating the insulation coefficient of the power insulation equipment in step (3) is as follows: where F is the body temperature, F N is the body temperature rating, I1 is the head end current, I2 is the tail end current, and A is the cross-sectional area of the power insulation.
4. The power insulation equipment state evaluation method based on stability analysis according to claim 3, characterized by, The specific method for evaluating and judging the state of the power insulation equipment according to the insulation coefficient in step (4) is as follows: judging whether the above insulation coefficient is greater than the insulation coefficient reference value, if yes, the state of the power insulation equipment is poor; if not, entering step (5).
5. The power insulation equipment condition assessment method based on stability analysis according to claim 4, characterized in that, The specific algorithm for calculating the insulation rate of the power insulation equipment in step (5) is as follows: wherein Δt is the sampling interval time.
6. The power insulation equipment condition assessment method based on stability analysis according to claim 5, characterized by, The specific method for evaluating and judging the state of the power insulation equipment according to the insulation rate in step (6) is as follows: judging whether the insulation rate is less than the insulation rate reference value, if yes, the state of the power insulation equipment is general; if not, the state of the power insulation equipment is good.
7. A power insulating equipment state evaluation system based on stability analysis, characterized by, The power insulation equipment state evaluation system comprises a signal collection unit, a storage unit, a control processing unit and an alarm unit, and the power insulation equipment state evaluation system adopts the power insulation equipment state evaluation method in any one of claims 1-7 for state evaluation.
8. The power insulating equipment condition assessment system based on stability analysis according to claim 7, characterized by, The collection unit collects the working information of the power insulation equipment, including the first-end current, the end current and the body temperature; the storage unit stores the information collected by the collection unit.
9. The power insulating equipment condition assessment system based on stability analysis according to claim 8, characterized by, The control processing unit evaluates and judges the state of the power insulation equipment, specifically as follows: preliminarily evaluating and judging the state of the power insulation equipment according to the first-end current and the end current; calculating the insulation coefficient of the power insulation equipment; evaluating and judging the state of the power insulation equipment according to the insulation coefficient; calculating the insulation rate of the power insulation equipment; The insulation rate is evaluated according to the power insulation equipment state.