The best temperature measurement system manufacturer in Asian power equipment-INNO

Waarom hebben hoogspanningssystemen nodig? temperatuur meting
De betrouwbaarheid van hoogspanningsschakelapparatuur onder omstandigheden met hoge spanning en hoge stroom hangt nauw samen met de temperatuurstijging van de isolatieschakelaarcontacten. Tijdens de werking van het elektriciteitsnet, mechanische trillingen, contacterosie, en andere redenen kunnen de contactomstandigheden verergeren, verhoging van de contactweerstand, een verhoging van de contactpunttemperatuur veroorzaken, verergeren de oxidatie van het contactoppervlak, en leiden tot plaatselijk lassen of boogontlading op losse contactpunten, uiteindelijk schade aan elektrische apparatuur veroorzaken, stroomuitval, of grote ongelukken zoals brand. Dit type ongeval met oververhitting van het contact is niet alleen te wijten aan het kwaliteitsprobleem van de hoogspanningskastschakelaar zelf, maar belangrijker nog, vanwege het gebrek aan effectieve monitoringmethoden voor de temperatuurstijging van de isolatieschakelaarcontacten op dit moment. With the rapid development of the national economy, the scale of engineering construction is increasing year by year, and urban supporting facilities are improving year by year. Als resultaat, the demand for power cables will increase year by year. Echter, the current power cables on the market lack online temperature monitoring function.

With the development of the power system, the voltage and current of cable loads are constantly increasing, which inevitably leads to the temperature rise of cables approaching the limit temperature during operation; During abnormal operation of cable joints and power systems (such as overload, short circuit tripping, enz.), abnormal temperature rise of cables may also occur; Hoe de temperatuurveranderingen van kabels tijdens bedrijf en bediening effectief kunnen worden bewaakt, is een belangrijke kwestie om de veiligheid van het voedingssysteem te garanderen, en het is van groot belang voor de productie en het dagelijks gebruik van elektriciteit.

De hoogspanningskabellijn van 66 kV-500 kV is de ruggengraat van ons land. Zijn stabiele werking, veiligheid en betrouwbaarheid houden rechtstreeks verband met de nationale economie, het levensonderhoud van mensen, en sociale ontwikkeling. De structuur van hoogspanningskabels bestaat voornamelijk uit geleiders, isolatie, metalen afscherming, en niet-metalen buitenmantels. Traditionele ultrahoge spanning temperatuur metende optische vezels worden op het oppervlak van de geïsoleerde vezelkern geplaatst, en de gemeten temperatuur is de oppervlaktetemperatuur van de isolatie, rather than the actual operating temperature of the conductor, and the metal shielding is mostly made of wrinkled aluminum sheaths. In de afgelopen jaren, the proportion of power system power supply interruptions caused by cable fires has been on the rise in power system fire accidents, which have caused huge losses to the national economy, people’s property, and personal safety.

Power equipment generates a large amount of heat during high load operation. If the temperature inside the equipment is not timely understood and corresponding measures are not taken when the external temperature is too high, the normal operation of power equipment will be affected due to high temperature, and even equipment damage may occur,

Accidents in the power system often occur due to overheating of critical parts of high-voltage live equipment or high load sections of wires. The hazards of such accidents are extremely high, ranging from minor damage to equipment and affecting usage
Household electricity can cause a short circuit in the transmission line, resulting in a large short-circuit current and burning out the main transformer. Daarom, real-time online monitoring of the temperature of the transmission line is an important aspect of ensuring the safe operation of the power grid.

Temperature measurement methods for power equipment

1. Resistance temperature measurement method

According to the principle that the resistance of a wire increases as the wire temperature increases. To measure the temperature rise of the motor winding.

2. Using handheld infrared thermometer or thermal imaging thermometer

The handheld thermometer is severely affected by the professional quality and environmental conditions of the photographer, and cannot monitor the operation status of power equipment in real time. The temperature measurement data cannot truly reflect the status of the equipment under specific environmental conditions, and there are also problems in accurately locating the detection parts of the equipment; Nu, online infrared temperature monitoring is being carried out both domestically and internationally, but the temperature measurement method is rough and cannot achieve the goal of accurate temperature measurement of key parts of power equipment. Bovendien, these temperature measurement methods are often limited to thermal image capture, post analysis, or limited to measuring a fixed number of temperature objects in the same image. Traditional temperature measurement methods generally use thermocouples or infrared monitoring, but in high-voltage cable applications, thermocouples that transmit signals through metal wires have high-voltage safety issues; Non contact temperature measurement based on infrared technology is inconvenient to install and has high temperature
Degree measurement is susceptible to environmental interference and other issues.

3. Draadloze temperatuurmeting

The biggest drawback of wireless is the lifespan of the battery and its susceptibility to external interference.

4. Glasvezel temperatuurmeting

Glasvezeltemperatuursensoren worden voornamelijk gedistribueerd en glasvezelfluorescentietemperatuursensoren. Gebruik van optische vezels om temperatuursignalen te verzenden, the optical fiber has good insulation performance and is not affected by high voltage inside the switchgear. The optical fiber temperature sensor can be directly installed on the high voltage contacts inside the switchgear, het nauwkeurig meten van de werktemperatuur van de hoogspanningscontacten en het voltooien van de online monitoring van de werktemperatuur van de schakelapparatuurcontacten.