INNO फायबर ऑप्टिक तापमान सेन्सर ,तापमान निरीक्षण प्रणाली.
फायबर ऑप्टिक तापमान सेन्सर, बुद्धिमान निरीक्षण प्रणाली, चीनमध्ये वितरित फायबर ऑप्टिक निर्माता
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Why do high-voltage power systems need temperature measurement
The reliability of high-voltage switchgear under high voltage and high current conditions is closely related to the temperature rise of the isolation switch contacts. पॉवर ग्रिडच्या ऑपरेशन दरम्यान, यांत्रिक कंपन, संपर्क धूप, आणि इतर कारणांमुळे संपर्काची परिस्थिती बिघडू शकते, संपर्क प्रतिकार वाढवा, संपर्क बिंदू तापमानात वाढ होऊ, संपर्क पृष्ठभाग ऑक्सिडेशन वाढवणे, आणि सैल संपर्क बिंदूंवर स्थानिक वेल्डिंग किंवा आर्क डिस्चार्ज होऊ शकते, शेवटी विद्युत उपकरणांचे नुकसान होते, वीज खंडित होणे, किंवा आगीसारखे मोठे अपघात. या प्रकारचा संपर्क ओव्हरहाटिंग फॉल्ट अपघात केवळ उच्च-व्होल्टेज कॅबिनेट स्विचच्या गुणवत्तेच्या समस्येमुळे होत नाही., पण अधिक महत्त्वाचे, सद्यस्थितीत अलगाव स्विच संपर्कांच्या तापमान वाढीसाठी प्रभावी निरीक्षण पद्धतींच्या अभावामुळे. 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. As a result, the demand for power cables will increase year by year. तथापि, 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, इ.), abnormal temperature rise of cables may also occur; How to effectively monitor the temperature changes of cables during operation and operation is an important issue to ensure the safety of the power system, and it is of great significance for the production and daily life of using electricity.
The 66kV-500kV high-voltage power cable line is the backbone transmission line of our country. Its stable operation, safety and reliability are directly related to the national economy, people’s livelihood, and social development. The structure of high-voltage cables is mainly composed of conductors, इन्सुलेशन, metal shielding, and non-metallic outer sheaths. Traditional ultra-high voltage temperature measuring optical fibers are placed on the surface of the insulated fiber core, and the measured temperature is the surface temperature of the insulation, rather than the actual operating temperature of the conductor, and the metal shielding is mostly made of wrinkled aluminum sheaths. अलिकडच्या वर्षांत, 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. त्यामुळे, 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; सध्या, 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. शिवाय, 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.
The biggest drawback of wireless is the lifespan of the battery and its susceptibility to external interference.
4. Fiber optic temperature measurement
Fiber optic temperature sensors are mainly distributed and fiber optic fluorescence temperature sensors. Using optical fiber to transmit temperature signals, 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, accurately measuring the working temperature of the high voltage contacts and completing online monitoring of the working temperature of the switchgear contacts.
