Transformer is a static electrical equipment used to transform the AC voltage and current and transmit the AC electrical energy. It is based on the principle of electromagnetic induction to achieve the transmission of electrical energy. Power transformer is a necessary equipment for power transmission and distribution, power user distribution. Power transformer is one of the main equipment of power plant and substation. The role of the transformer is multifaceted not only to raise the voltage to send electricity to the power area, but also to reduce the voltage for all levels of use, to meet the needs of electricity. In short, the step-up and step-down voltage must be completed by the transformer. In the national economy energy strategy, the role of power transformers is highlighted. Large transformer transportation has the corresponding key indicators for the transport vehicle type, vehicle performance, tractor and trailer combination design, transport route planning, etc. One of the key points is for the monitoring of transport vibration. Transformer transportation exists in a certain location environment, such as uneven incentive of the road and emergency braking, it is possible that the transformer is subject to vibration and impact, causing some parts of the transformer to be displaced or some insulation to be damaged, reducing its service life. Article 2.1.3 national standard "three-phase oil-immersed power transformer technical parameters and requirements" (GB6451.1 ~ 5-86) states: "voltage at 220kV, capacity of 150 ~ 360MVA transformer transport should be installed impact recorder. Overseas large transformers and oil-immersed reactors are mostly equipped with impact recorders during transportation to record the impact and vibration during transportation and loading and unloading. The impact recorder used must be accurate and reliable. Humpback whales provide an electrical user with economical and practical portable precision instrumentation for vibration tilt monitoring equipment. Transformer is a static electrical equipment used to transform the AC voltage and current and transmit the AC electrical energy. It is based on the principle of electromagnetic induction to achieve the transmission of electrical energy. Power transformer is a necessary equipment for power transmission and distribution, power user distribution. Power transformer is one of the main equipment of power plant and substation. The role of the transformer is multifaceted not only to raise the voltage to send electricity to the power area, but also to reduce the voltage for all levels of use, to meet the needs of electricity. In short, the step-up and step-down voltage must be completed by the transformer. In the national economy energy strategy, the role of power transformers is highlighted. Large transformer transportation has the corresponding key indicators for the transport vehicle type, vehicle performance, tractor and trailer combination design, transport route planning, etc. One of the key points is for the monitoring of transport vibration. Transformer transportation exists in a certain location environment, such as uneven incentive of the road and emergency braking, it is possible that the transformer is subject to vibration and impact, causing some parts of the transformer to be displaced or some insulation to be damaged, reducing its service life. Article 2.1.3 national standard "three-phase oil-immersed power transformer technical parameters and requirements" (GB6451.1 ~ 5-86) states: "voltage at 220kV, capacity of 150 ~ 360MVA transformer transport should be installed impact recorder. Overseas large transformers and oil-immersed reactors are mostly equipped with impact recorders during transportation to record the impact and vibration during transportation and loading and unloading. The impact recorder used must be accurate and reliable. Humpback whales provide an electrical user with economical and practical portable precision instrumentation for vibration tilt monitoring equipment.

Challenge

To ensure the safety of electrical equipment during transportation, every effort should be made to avoid abnormal conditions such as emergency braking, violent vibration, ramming or severe bumps. The direct impact factors that cause transformer damage in transportation are vibration and shock, so controlling vibration and shock is the focus of transformer transportation monitoring systems. In a large number of studies on transport vibration and shock, it is generally agreed that the acceleration of the measurement of transport vibration and shock of the classical parameters, so the size of the vibration and shock acceleration needs to be controlled within the safety range. According to the specification GB/T6451, China's large transformer transportation in 3 directions of impact allowed value are 3 g. The indicator refers to when the acceleration of the impulse does not exceed 3 g, the transformer without any deformation, loosening and damage. During transportation, if the transformer experiences vibrations that exceed the recommended acceleration level, the following possible damages will occur: due to the movement of some parts, the isolation material between the corners will be scraped and worn, which will lead to short circuits and damage to the coils in subsequent operations; mechanical vibrations will lead to slackening of the coil clamping pressure and eventually coil collapse due to electrical failure; the case and moving parts of the safety clearance may change, etc. Customers in transit, the traditional monitoring equipment is large and heavy, installation to be perforated, not convenient to use, and the price is high, imported products are often tens of thousands of dollars, usually the case of the recorder is not real-time, the device returns to read the data, data single, maintenance and upgrade is not convenient, the state is not quantified, can only estimate the vibration / tilt amplitude. For the problem tracking effect is low, monitoring is not real-time, can not know when and where the problem, can not record all the vibration / tilt condition throughout the whole process, human operation impact is large, remote can not be supervised. To ensure the safety of electrical equipment during transportation, every effort should be made to avoid abnormal conditions such as emergency braking, violent vibration, ramming or severe bumps. The direct impact factors that cause transformer damage in transportation are vibration and shock, so controlling vibration and shock is the focus of transformer transportation monitoring systems. In a large number of studies on transport vibration and shock, it is generally agreed that the acceleration of the measurement of transport vibration and shock of the classical parameters, so the size of the vibration and shock acceleration needs to be controlled within the safety range. According to the specification GB/T6451, China's large transformer transportation in 3 directions of impact allowed value are 3 g. The indicator refers to when the acceleration of the impulse does not exceed 3 g, the transformer without any deformation, loosening and damage. During transportation, if the transformer experiences vibrations that exceed the recommended acceleration level, the following possible damages will occur: due to the movement of some parts, the isolation material between the corners will be scraped and worn, which will lead to short circuits and damage to the coils in subsequent operations; mechanical vibrations will lead to slackening of the coil clamping pressure and eventually coil collapse due to electrical failure; the case and moving parts of the safety clearance may change, etc. Customers in transit, the traditional monitoring equipment is large and heavy, installation to be perforated, not convenient to use, and the price is high, imported products are often tens of thousands of dollars, usually the case of the recorder is not real-time, the device returns to read the data, data single, maintenance and upgrade is not convenient, the state is not quantified, can only estimate the vibration / tilt amplitude. For the problem tracking effect is low, monitoring is not real-time, can not know when and where the problem, can not record all the vibration / tilt condition throughout the whole process, human operation impact is large, remote can not be supervised.

Solution

Vibration is caused by many different periodic swaying motions. During actual transportation, none of the vibrations are of a single frequency. Complex transport environments often result in the generation of compound frequencies (frequency ranges) consisting of individual frequencies of different amplitudes. In road transportation, the frequencies occurring are in the range of 3-350 Hz. Also, according to the specification, during transportation, the tilt angle of the transformer body cannot be greater than 15 degrees in the long-axis direction and 10 degrees in the short-axis direction. The humpback whale portable precision instrument version equipment is linked with the whale cloud IOT management platform, which adopts sensitive sensors such as 6-axis or 9-axis acceleration sensors and angular velocity sensors, as well as GSP/LBS hybrid positioning method to provide users with various necessary monitoring parameters to effectively supervise the transportation process in real time, and for the case that exceeds the threshold value of each axial vibration as required by the specification and the case that the long axis or short axis exceeds the tilt angle threshold The situation of each axial vibration threshold and the long axis or short axis exceeding the tilt threshold can be recorded in real time and alarm information can be sent to the platform and the responsible person, which provides a basis for post-evaluation and timely intervention, and the real-time platform data collection and analysis provides an effective guarantee for the customer's transportation. The equipment involved in this program is mainly the Whale Dart portable precision instrument version products.