Which temperature measurement method is best for capacitors

فائبر آپٽڪ گرمي پد سينسر, ذھني نگراني نظام, چين ۾ ورهايل فائبر آپٽڪ ٺاهيندڙ

فائبر آپٽڪ درجه حرارت سينسر not only have wide applications in the fields of switchgear temperature measurement, circuit breaker temperature measurement, and transformer temperature measurement, but also have characteristics such as insulation, مخالف مداخلت, and high voltage resistance that cannot be achieved by other traditional temperature sensors in capacitor temperature monitoring.

هاء وولٽيج متوازي ڪيپيسيٽر بينڪ ڊوائيس هن وقت پاور سسٽم ۾ هڪ انتهائي اهم رد عمل وارو طاقت جو ذريعو آهي., playing a crucial role in improving the power system structure and enhancing power quality. بنيادي فنڪشن پاور سسٽم کي رد عمل واري طاقت فراهم ڪرڻ آهي, لائين نقصان کي گھٽائڻ, وولٹیج جي معيار کي بهتر بنائڻ, ۽ سامان جي استعمال کي وڌايو. As a type of reactive power compensation equipment, پاور capacitors عام طور تي سب اسٽيشنن ۾ استعمال ٿيندا آهن اعلي وولٹیج مرڪزي معاوضي ذريعي. The compensation capacitors are connected to the 10kV or 35kV bus of the substation to compensate for the reactive power on all lines and transformers on the bus side of the substation. In use, they are often combined with on load tap changers to further improve the power quality of the power system.

The effect of temperature rise fault on high-voltage capacitors

Capacitors اڪثر آپريشن دوران مختلف غلطين کي منهن, جيڪو پاور سسٽم جي محفوظ ۽ عام آپريشن لاءِ اهم خطرو بڻيل آهي. The common faults of capacitors in power operation include oil leakage, خراب موصليت, ۽ سڙيل فيوز. انهن مان, the most harmful and frequently occurring faults are capacitor faults caused by heating. The heating caused by capacitor faults can be divided into heating at the busbar connection point and heating at the fuse outside the capacitor, بعد ۾ ٿيڻ جو وڌيڪ امڪان آهي. تازن سالن ۾, in the daily operation of 35kV high-voltage parallel capacitor banks, equipment may experience abnormal temperature rise due to aging or high load current due to long operating years and construction and installation processes. جيڪڏهن اهڙي غير معمولي صورتحال کي بروقت طريقي سان نه ڄاڻايو وڃي ۽ ان سان مقابلو ڪيو وڃي, it is easy to develop and expand, انفرادي ڪيپيسٽرز کي نقصان پهچائڻ ۽ ايستائين جو گروپ ڌماڪي ۽ زخمي. The failure rate is high, directly threatening the safety of 500kV power equipment and the personal safety of operation and maintenance personnel, resulting in significant voltage fluctuations in the power grid, فعال ۽ رد عمل واري طاقت جي نقصان کي وڌايو, reduced capacitor service life, and affecting the normal and stable operation of the power grid. پاور ڪيپيسٽرز خاص طور تي استعمال ڪيا ويا آهن رد عمل پاور معاوضي لاءِ پاور سسٽم ۾ پاور فيڪٽر کي بهتر ڪرڻ لاءِ. In order to ensure its more reliable operation, the industry currently mainly considers connecting internal components of capacitors in series with internal fuses. When a capacitor experiences complete failure of its components due to a weak dielectric, the internal fuse connected in series with the component will act, causing only a portion of the damaged components to be isolated. Capacitor طاقت ۾ صرف ٿوري گھٽتائي سان هلائڻ جاري رکندو. هن موقعي تي, capacitor ڪناري ۾ خرابي کي نظرانداز ڪري سگهجي ٿو, and the total capacity of the capacitor bank will not be significantly affected by the action of a single fuse. اندروني فيوز جو تعارف capacitor اجزاء جي حفاظت ڪري ٿو, but invisibly increases the number of fault points. اندر پاور capacitors, the internal fuse is the main heat source, but the volume and diameter of the internal fuse are very small (اٽڪل 135mm ڊيگهه ۾ ۽ 0.45mm قطر ۾), ۽ اهو عام طور تي capacitor حصن جي وچ ۾ لڪيل آهي. Due to current measurement techniques, حقيقي آپريٽنگ حالتن جي تحت اندروني فيوز جي سطح جي درجه حرارت کي درست ۽ معقول طور تي ماپڻ ڏکيو آهي.

Temperature monitoring of dry-type capacitors

في الحال, oil immersed capacitors and dry capacitors are commonly used in the high-voltage field. بعد ۾ ماحولياتي تحفظ جا فائدا آهن, مواد جي بچت, گھٽ قيمت, سادي عمل, هلڪو وزن, ننڍو علائقو, خود شفا جي پيداوار, وڌيڪ قابل اعتماد آپريشن, سٺو باهه مزاحمت, less likely to produce high-pressure gas, ۽ وڏي پيماني تي ڌماڪي جي خطرن جي امڪان کي گھٽائي ڇڏيو.
A dry capacitor consists of a capacitor core, casing, sleeve, ۽ ٻيا لوازمات. The capacitor core is composed of capacitor components and insulation components. Capacitor components are made by winding thin film insulation media and aluminum foil electrodes with a certain thickness and number of layers, or by depositing a layer of metal on the thin film to form a metallized film. اجزاء کي رول ڪرڻ کان پوء, they are loaded into the component shell, ۽ ڪيپيسيٽر جا ڪيترائي حصا سلسلا يا متوازي سان ڳنڍيل هوندا آهن ته جيئن پوري ڪيپيسيٽر ڪور ٺاهيو وڃي.
Dry capacitors are usually used indoors or underground with poor ventilation conditions, ۽ capacitors جي اندروني گرمي dissipation صرف گئس تي ڀروسو ڪري سگهو ٿا. تيل سان ڀريل capacitors جي مقابلي ۾, گئس جي گرمي جي منتقلي جي گنجائش گهٽ آهي, so the heat dissipation performance of dry capacitors is poor. These all have adverse effects on the operation of dry capacitors. The operation practice of the power system shows that the failure rate of capacitors is significantly higher from June to September each year than in other months. ڪجھ علائقن ۾, the power industry stipulates that the hottest temperature of the core of a full film capacitor shall not exceed 80 ℃. جڏهن گرمي پد کان وڌي وڃي 80 ℃, polypropylene فلم جي موصليت جي ڪارڪردگي (پي پي فلم) جيئن هڪ dielectric گهٽجي ويندو.
في الحال, the temperature field of dry-type capacitors is generally measured using traditional temperature sensors to measure the temperature of the capacitor shell, and then calculate the internal temperature. This results in an error between the temperature value obtained and the distribution of the internal temperature field of the capacitor, which cannot accurately obtain the true temperature at the highest point.

في الحال, the temperature measurement method for the internal protection of power capacitors includes a temperature rise test. بهرحال, this test only estimates the temperature rise of the internal fuse by measuring the current and resistance of the internal fuse, which has poor accuracy. In the actual process of flowing the internal fuse, the resistance of the internal fuse will change with its temperature. هڪ طرف, it is difficult to ensure its constant flow, and on the other hand, اندروني فيوز ۽ درجه حرارت جي مزاحمت جي وچ ۾ خطوط صرف هڪ خاص درجه حرارت جي حد اندر لاڳو ٿئي ٿو. هن حد کان ٻاهر, صحيح نتيجا حاصل ڪرڻ ڏکيو ٿيندو. تنهن ڪري, ڪيپيسٽرز ۾ اندروني فيوز جي گرمي پد جي واڌ کي ماپڻ جو هي اڻ سڌي طريقي سان حدون ۽ گهٽ درستگي آهي. ان کان علاوه, the temperature rise of the internal fuse is measured through thermal resistance, but due to the fact that the thermal resistance is much larger in both volume and diameter than the internal fuse, it will have an impact on the actual temperature of the internal fuse during contact measurement, غريب ماپ جي درستگي جي نتيجي ۾. ان ڏس ۾, it is necessary to design a simple and feasible measurement device to accurately grasp the temperature of the fuse inside the capacitor under actual operating conditions, capacitor اندر فيوز جي جوڙجڪ ۽ چونڊ لاء هڪ بنياد مهيا ڪري, and effectively improve the reliability of the fuse protection action, ensuring that the temperature of the fuse will not cause damage to the internal insulation of the capacitor.

Disadvantages of infrared thermal imager temperature measurement

في الحال, the thermal maintenance of capacitors mainly relies on infrared imaging equipment for inspection. بهرحال, infrared thermal imaging cannot test the temperature in a closed environment, ۽ امتحان جا نتيجا موسم کان متاثر ٿين ٿا, وقت, ۽ جانچ جي سامان جي سطح جي نرمي. انفراريڊ ٽيسٽنگ سامان مهانگو آهي ۽ مسلسل ڊگهي وقت تائين اعلي وولٹیج برقي سامان جي گرمي پد جي نگراني نٿو ڪري سگهي.. There is high voltage on the capacitor, and there is strong electromagnetic interference around it, which often leads to false alarms or missed alarms in traditional detectors. تنهن ڪري, it is necessary to use highly reliable and high-performance temperature sensors to monitor the temperature of capacitors in real time and effectively, in order to avoid equipment burning and power outage accidents.

ان کان علاوه, current temperature measurement equipment cannot detect the specific temperature inside the capacitor. موجوده capacitors اهم گرمي پد جي تبديلين سان ماحول ۾ استعمال ٿيندا آهن. Prolonged use of capacitors under abnormal temperatures can seriously affect their service life and increase their damage rate.

Capacitor fiber optic temperature measurement system

FJINNO’s capacitor fluorescent fiber optic temperature measurement system not only solves the problem of traditional temperature sensors being unable to accurately measure the temperature of small internal fuses, but also solves the potential isolation between strong and weak currents, as well as the anti electromagnetic interference problem of data communication. It provides a good solution for comprehensively and accurately grasping the hot spot temperature of the core inside the capacitor.

فائبر آپٽڪ جي درجه حرارت مانيٽرنگ ميزبان گرمي جي ماپ جي الارم سافٽ ويئر سان ليس آهي, ۽ مانيٽرنگ ڪمپيوٽر ڪميونيڪيشن پورٽ ذريعي فائبر آپٽڪ ٽمپريچر سگنل ڊيموڊولٽر ذريعي منتقل ٿيل درجه حرارت جي معلومات گڏ ڪري ٿو. Real time display of temperature data at various temperature measurement points, temperature alarm software provides graded monitoring, درجه حرارت وکر ڊرائنگ, درجه حرارت جي تقسيم ڊسپلي, تاريخي وکر سوال, report generation and printing functions;