Ambayo ni bora kwa kipimo cha halijoto ya infrared au kipimo cha halijoto ya nyuzi macho ya vibadilishaji vibadilishaji vya nishati ya photovoltaic

The reasons for the temperature rise and heating of new energy photovoltaic inverters

The rapid development of smart grids and new energy has led to significant advancements in power electronics technology for pulse width modulation control. The power consumption issue of power electronic switching devices is an important factor limiting energy conversion efficiency, especially in high voltage and high-power applications. Power electronic switching devices are affected by switching frequency, making it difficult to fundamentally eliminate switching losses. Excessive power consumption can lead to excessively high operating temperatures of the switching devices, which not only affects system efficiency but also has a certain impact on the safe and stable operation of the system.

Katika miaka ya hivi karibuni, the development of photovoltaic greenhouses has been increasingly rapid, and various types of greenhouses have emerged one after another. Photovoltaic greenhouses are being applied in more and more areas. There are more and more types of photovoltaics, and after photovoltaic power generation, inverters are needed to convert the DC of photovoltaic power generation into AC, and then connect it to the grid for transportation. The temperature inside the photovoltaic inverter needs to be controlled within a reasonable range. Excessive temperature can cause a sharp decrease in the efficiency of the photovoltaic inverter and also have a significant impact on its lifespan.

Temperature rise in solar photovoltaic systems

With the rapid growth of electricity demand in our country, the application range of solar photovoltaic systems in the power system is becoming wider and wider. The existing solar photovoltaic system mainly consists of solar panels, vidhibiti, inverters, betri, nk. Due to the fact that solar photovoltaic systems are often operated under long-term sunlight, their structural performance and high-temperature resistance service life are key design points in existing technologies. The usage environment of photovoltaic inverters is limited by solar power plants, and they are generally installed in remote areas with harsh natural environments. The inverter environment has certain requirements for temperature, unyevunyevu, and cleanliness. Especially for inverters used in solar photovoltaic systems, which are located in remote areas with frequent exposure to sunlight, kupambana na kuingiliwa kwa magnetic na kusafisha kinga ni lengo la muundo wao. Katika miaka ya hivi karibuni, sekta ya photovoltaic imeendelea kwa kasi. Inverters za photovoltaic ni mojawapo ya vifaa vya msingi vya uzalishaji wa umeme wa photovoltaic. Wanafanya kazi katika mazingira ya juu ya sasa na yenye nguvu ya shamba la magnetic kwa muda mrefu na wanakabiliwa na overheating ya ndani, kusababisha moto na kukatika kwa umeme kwa kiasi kikubwa. Hata hivyo, hali ya hewa katika maeneo tofauti ni tofauti, na matokeo ya vipimo vya aina ya maabara hayawezi kuonyesha ongezeko la joto la inverters kwenye tovuti kwenye mitambo ya nguvu ya photovoltaic..

Ni njia gani za kupima hali ya joto kwa inverters

Kwa upande wa upimaji wa ongezeko la joto kwenye tovuti kwa inverters, kwa sasa kuna mbinu ya kipimo cha halijoto ya infrared, kipimo cha joto la fiber optic mbinu, na njia ya kupima joto la uso wa akustisk.

Kipimo cha joto cha vifaa vya kubadili umeme vya nguvu katika vibadilishaji vya jadi hupatikana kupitia taswira za joto za infrared, ambayo hupima thamani ya halijoto ya vifaa vya kubadilisha kigeuzi kwa kuchukua picha za thermodynamic za eneo la kipimo linalohitajika. Hata hivyo, thermometers ya infrared ina vikwazo vingi, kama vile kuweza tu kubainisha thamani ya kipimo cha eneo lengwa kulingana na picha zilizonaswa, ambayo inasababisha kutoweza kupata data ya sasa kwa wakati na kwa usahihi; Aidha, wafanyakazi pia wanatakiwa kufanya vipimo kwenye tovuti, kwani kuna kiwango fulani cha hatari katika hali ya shinikizo la juu na hakuna utendakazi mzuri
Ngono; Usahihi wa kipimo cha picha za infrared ya joto sio juu, na bei pia ni ghali kiasi.

Kanuni ya njia ya kipimo cha joto la infrared

Kulingana na sheria ya mionzi ya blackbody, joto la uso wa kitu huamuliwa kwa kupima nishati yake ya mionzi ya infrared. Kipiga picha cha joto cha infrared kinachotumika kwa mkono ni njia ya kawaida ya kupima isiyo ya mawasiliano ambayo inahitaji uendeshaji wa mikono., haiwezi kufikia kipimo cha mtandaoni bila kukatizwa, haiwezi kupima vifaa vya ndani kupitia mlango wa baraza la mawaziri (mlango wa baraza la mawaziri lazima limefungwa wakati inverter inaendesha), na huathirika na mambo kama vile halijoto, uchafuzi wa mazingira, and interference.
Mbinu ya kupima halijoto ya mtandaoni ni njia nyingine ya kipimo cha halijoto isiyogusika, ambayo inahitaji hatua iliyopimwa kuwa katika uwanja wa mtazamo na usiozuiliwa, uso lazima uwe safi ili kuhakikisha usahihi, and it is susceptible to environmental and surrounding electromagnetic interference during testing. Aidha, the space inside the switchgear is very small, making it difficult to install infrared temperature probes. Aidha, there are many factors that affect infrared radiation and they are time-varying, making it difficult to calibrate them one by one. Kwa hiyo, this method has poor universality and cannot be widely used.

The acoustic surface temperature measurement method uses passive wireless sensors, but is limited by the frequency bandwidth splitting principle and signal simulation processing technology of the acoustic meter temperature measurement. It has the disadvantages of being easily interfered with and having poor scalability, and is prone to temperature measurement interruption or significant data jump. Too many sensors cannot be installed, otherwise the receiving system cannot distinguish.

Inverter kipimo cha joto la fiber optic

Temperature testing is conducted based on the principle of optical time-domain reflection in optical fibers and the temperature effect of backward Raman scattering in optical fibers. Fiber optic has excellent insulation performance and can isolate high voltage inside the inverter cabinet. Fiber optic temperature sensors can be directly installed on the high voltage contacts inside the cabinet to accurately measure the operating temperature of the high voltage contacts.

The inverter fluorescent mfumo wa ufuatiliaji wa joto la fiber optic installs fiber optic temperature sensors on the corresponding inverter switch devices, and then obtains the temperature of the inverter switch devices in a timely manner through the fluorescent fiber optic temperature controller, improving the accuracy of temperature detection; Further storage and display of relevant temperature data through LCD display screens facilitates technical personnel’s query.

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Sensor ya joto ya fiber optic, Mfumo wa ufuatiliaji wa akili, Kusambazwa fiber optic mtengenezaji nchini China