Which temperature measurement method is best for capacitors

Sensor Suhu Optik Optik 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, Anti-campur, and high voltage resistance that cannot be achieved by other traditional temperature sensors in capacitor temperature monitoring.

Piranti bank kapasel sing paling dhuwur voltase saiki minangka sumber daya reaktif sing penting banget ing sistem listrik, playing a crucial role in improving the power system structure and enhancing power quality. Fungsi utama yaiku nyedhiyakake kekuwatan reaktif menyang sistem daya, Ngurangi kerugian baris, ningkatake kualitas voltase, lan nambah panggunaan peralatan. As a type of reactive power compensation equipment, Kapasitor kekuwatan biasane digunakake ing substria liwat ganti rugi sing terpusat. 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

Kapasitor asring nemoni macem-macem kesalahan sajrone operasi, sing nyebabake ancaman sing signifikan kanggo operasi aman lan normal saka sistem listrik. The common faults of capacitors in power operation include oil leakage, Penebat, lan sekring sing diobong. Antarane wong-wong mau, 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, karo sing terakhir luwih cenderung kedadeyan. Ing taun-taun pungkasan, 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. Yen kahanan sing ora normal kaya ngono ora dideteksi lan ditangani kanthi tepat, it is easy to develop and expand, ndadékaké karusakan ing kapasitor individu lan uga jeblugan lan cedera klompok. 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, mundhak aktif lan reaktif, reduced capacitor service life, and affecting the normal and stable operation of the power grid. Kapasitor daya biasane digunakake kanggo ganti rugi reaktif ing sistem tenaga kanggo nambah faktor tenaga. 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. Kapasitor bakal terus operate kanthi mung nyuda daya sithik. Ing wektu iki, gangguan ing bank kapasitor bisa digatekake, and the total capacity of the capacitor bank will not be significantly affected by the action of a single fuse. Introduksi sekring internal nglindhungi komponen kapasitor, but invisibly increases the number of fault points. Ing Kapalitor Power, the internal fuse is the main heat source, but the volume and diameter of the internal fuse are very small (udakara 135mm dawa lan diameteripun 0,45mm), Lan umume didhelikake antarane komponen kapasitor. Due to current measurement techniques, Dadi angel kanggo ngukur suhu permukaan sekring internal ing kahanan operasi nyata.

Temperature monitoring of dry-type capacitors

Ing saiki, oil immersed capacitors and dry capacitors are commonly used in the high-voltage field. Sing terakhir duwe kaluwihan perlindungan lingkungan, Simpen Bahan, biaya kurang, Proses prasaja, bobot entheng, Wilayah cilik, Produk Penyembuhan Dhiri, operasi sing luwih dipercaya, Rintangan geni sing apik, less likely to produce high-pressure gas, lan suda banget kemungkinan beboyo sing njeblug.
A dry capacitor consists of a capacitor core, casing, sleeve, lan aksesoris liyane. 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. Sawise komponen digulung, they are loaded into the component shell, lan sawetara komponen kapasitor wis nyambung ing seri utawa podo kanggo mbentuk inti kapapitor kabeh.
Dry capacitors are usually used indoors or underground with poor ventilation conditions, lan dissipasi panas kapasit internal mung bisa nggedhekake gas. Dibandhingake karo kapasitor minyak sing dicelupake, Koefisian transfer panas gas luwih murah, 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. Ing sawetara wilayah, the power industry stipulates that the hottest temperature of the core of a full film capacitor shall not exceed 80 ℃. Yen suhu ngluwihi 80 ℃, Kinerja jampel film polipropilena (Film pp) Minangka dielektrik bakal nyuda.
Ing saiki, 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.

Ing saiki, the temperature measurement method for the internal protection of power capacitors includes a temperature rise test. Nanging, 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. Ing tangan siji, it is difficult to ensure its constant flow, and on the other hand, koresponden antarane resistensi sekring internal lan suhu mung ditrapake ing sawetara suhu tartamtu. Ngluwihi kisaran iki, Bakal angel entuk asil sing akurat. Mulane, Cara sing ora langsung iki kanggo ngukur kenaikan suhu internal ing kapasitor duwe watesan lan akurasi sing kurang. Kajaba iku, 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, nyebabake akurasi pangukuran sing luwih rusak. Ing tampilan iki, 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, Nyedhiyakake dhasar desain lan pilihan sekring ing kapasitor, 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

Ing saiki, the thermal maintenance of capacitors mainly relies on infrared imaging equipment for inspection. Nanging, infrared thermal imaging cannot test the temperature in a closed environment, lan asil tes kena pengaruh musim iki, Wektu, lan lumahing lancar saka peralatan tes. Peralatan uji inframerah larang regane lan ora bisa terus ngawasi suhu peralatan listrik dhuwur kanggo wektu sing suwe. 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. Mulane, 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.

Kajaba iku, current temperature measurement equipment cannot detect the specific temperature inside the capacitor. Kapalitor sing ana digunakake ing lingkungan kanthi owah-owahan suhu sing signifikan. Prolonged use of capacitors under abnormal temperatures can seriously affect their service life and increase their damage rate.

Kapasitor sistem pengukuran suhu serat optik

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.

Host pemantauan Suhu Optik dilengkapi karo piranti lunak weker pangukuran suhu, Lan komputer pemantauan nglumpukake informasi suhu sing dikirim dening demodulator signal suhu serat optik liwat port komunikasi. Real time display of temperature data at various temperature measurement points, temperature alarm software provides graded monitoring, Kurva Suhu Drawing, Tampilan distribusi suhu, Ukuran Kurva Sejarah, report generation and printing functions;

Sensor suhu serat optik, Sistem pemantauan cerdas, Produsèn serat optik mbagekke ing China