Basic concepts of Telemetry

the near distance measurement of the object parameters is transferred to the remote measuring station to realize the long distance measurement technology. Telemetry is the use of sensor technology,a comprehensive technology of communication technology and data processing technology. Telemetry is primarily used to centrally detect dispersed or inaccessible objects, such asThe object being measured is far away, is in a bad environment, or is in a high-speed motion state. Telemetry information is the real-time operation of the power system collected by RTU.parameters, such as generator output, bus voltage, power flow in the system, active and reactive loads, line currents, electrical measurements, etc.Information . Telemetry has been widely used in national economy, scientific research and military technology. The use of telemetry can achieve centralized monitoring, improve self-Improve labor productivity, improve working conditions and improve scheduling quality. Telemetry provides an important test hand for scientific research., which makes it difficult to carry out the measured research project, and obtains the important dynamic performance data. The actual telemetry system includes sensors, communicationand data processing equipment. Sensing technology and signal transmission technology are two key technologies of telemetry. accuracy, responsiveness and reliability of the sensorand the transmission speed and anti-jamming ability of the communication system determine the performance of the telemetry system. Modern telemetry system is widely used in high-precision transmissionadvanced equipment such as sensor, digital communications and electronic computers. The most advanced telemetry system is the aerospace telemetry system. Telemetry system can alsoas a special kind of communication system. Telemetry is often classified by signal transmission mode. such as wired telemetry and wireless telemetry, time-division telemetry andFrequency Division telemetry, analog telemetry and digital telemetry, real-time telemetry and cyclic telemetry.

Telemetry is often divided into important telemetry, secondary telemetry, general telemetry and total plus telemetry. The telemetry function is often used for the active and reactive power acquisition of Transformers, the acquisition of active powers, bus voltage and line current acquisition, temperature, pressure, flow (flow rate) and other acquisition, frequency acquisition and other analog signal acquisition.

PT (potential transformer) on behalf of the Voltage Transformer ct (current transformer) represents a transformer pt refers to a voltage transformer, CT refers to the current transformer, power system protection, control, measurement of electrical energy used are low voltage, small current, and voltage transformer is the high voltage to a certain proportion into the low voltage for protection and measurement instrument use, current transformer is the large current to a certain proportion into a small current for protection and measurement instrument use, so the voltage transformer and current transformer is high-voltage system and low-voltage system link bridge, It is also the isolating measure of high pressure system and low pressure system. TV is a voltage transformer, TA is a current transformer. This is the new way of writing, the name is different, the current converter, voltage converter; ct,pt or TA,TV can be called, simply say the pressure change, the rheological is PT and CT Chinese name:) CT two times 5 A or 1A depends on the size of its two load. The same two-capacity CT, with 1 a two times the rated output impedance is 5 a 25 times times.

Basic concepts of Telemetry