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Evaluation method of dry-type transformer health status based on three-level evaluation model

A technology of dry-type transformers and evaluation models, which is applied in the directions of instruments, data processing applications, design optimization/simulation, etc., can solve problems such as power grid paralysis and economic losses, reduce power accidents, reduce maintenance costs, and improve maintenance efficiency Effect

Active Publication Date: 2022-04-19
JIANGSU NUCLEAR POWER CORP +1
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Problems solved by technology

Among them, dry-type transformers have developed rapidly in the past 20 to 30 years, especially in the low-voltage power distribution system. Once their operation fails, the power grid will be paralyzed and cause major economic losses.

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  • Evaluation method of dry-type transformer health status based on three-level evaluation model
  • Evaluation method of dry-type transformer health status based on three-level evaluation model
  • Evaluation method of dry-type transformer health status based on three-level evaluation model

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Embodiment Construction

[0049] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0050] as Figure 1 As shown, the present invention provides a dry-type transformer health assessment method based on a three-level evaluation model, the method comprising the following steps:

[0051] Step 1, the collection of dry-type transformer operating conditions in the key parameter data, dry-type transformer insulation state data, dry-type transformer reliability parameter data, the key parameters include factory design life, service life, operating environment and operating load level, the amount of insulation state includes the hot spot temperature of the winding and electrical indicators, the electrical indicators include absorption ratio, core grounding current, insulation medium loss and direct resistance imbalance coefficient, the reliability parameters include group component status, family defects and adverse working conditions.

[0052...

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Abstract

The invention belongs to the technical field of state evaluation of electrical equipment, and specifically discloses a method for evaluating the health status of a dry-type transformer based on a three-level evaluation model. The method includes: collecting key parameter data and insulation state quantity data in the operating conditions of the dry-type transformer , reliability parameter data; according to the collected key parameter data, insulation state quantity data and reliability parameter data, respectively calculate the health index HI of the first-level evaluation model 1 , the health index HI of the second-level evaluation model 2 and the correction coefficient F of the third-level evaluation model 3 ;according to HI 1 、HI 2 and F 3 , to calculate the health index HI of the dry-type transformer. The method of the invention realizes the evaluation of the health status of the dry-type transformer, can effectively find out its potential faults and arrange maintenance time and items in a targeted manner, reduces the workload of dry-type transformer troubleshooting, and improves the safe and stable operation of the power system level and reliability of supply play an integral role.

Description

Technical field [0001] The present invention belongs to the technical field of electrical equipment state assessment, specifically relates to a dry-type transformer health assessment method based on a three-level evaluation model. Background [0002] Power transformer is one of the most important equipment in the operation of the power system, it undertakes the function of power conversion and voltage conversion, plays an important role in the safe and stable operation of the power grid and load, and its state directly affects the reliable operation of the power system. Among them, dry-type transformers have developed rapidly in the past two or three decades, especially in the proportion of low-voltage distribution systems, and once their operation fails, the power grid will be paralyzed, causing major economic losses. [0003] Therefore, it is urgent to develop a dry-type transformer health assessment method that can make judgments on the fault site, fault degree and developmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06Q10/06G06Q50/06G06F119/02
CPCG06F30/20G06Q10/0639G06Q50/06G06F2119/02
Inventor 雷成王永强杨磊杜宗阳周哲俊章勇李洪伟杨晓斌赵宇晗李亮
Owner JIANGSU NUCLEAR POWER CORP
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