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The role of the series capacitor

by:SMiLer     2021-03-07
Concept of series capacitor series capacitor is also a kind of reactive power compensation equipment usually series in the ultrahigh pressure lines of 330 kv and above, its main function from compensation ( Reduce) Reactance Angle to improve system voltage, in order to reduce power loss, improve the stability of the system. Series capacitors are widely used in power transmission and distribution system, especially the long distance, large capacity of power transmission system, improve the transportation capacity, improve the stability of the system to improve system voltage regulation, at the same time improve the power factor of system, reduce the loss of line. + 1 / Cn. Shunt capacitance can be increased, capacitance in series. Don't have big capacitance, for example, only a little, can and together with, on the contrary, no small can use large string together. Series capacitor is also a kind of reactive power compensation equipment are usually in series in the ultrahigh pressure lines of 330 kv and above, its main function from compensation ( Reduce) Reactance Angle to improve system voltage, in order to reduce power loss, improve the stability of the system. Series capacitor control and protection system protection and control design of series capacitor group into an integrated system, including measurement transducer, signal transmission system and the ground installation of man-machine interface and the corresponding auxiliary equipment complete protection and control system. The design principle of protection and control is to protect the capacitor Banks, capacitor Banks and ensure the system operation requirements of high reliability and high availability. Signal transmission system is an organic part of protection and control system, it connects the insulation platform measuring transducer and the signal transmitter to the control room of the protection and control cabinet on the signal receiver, it via a fiber optic signal of column and optical fiber cable, sends the signal from the insulation platform to the control room. On insulation platform, the current signal is converted into the infrared signal, through the column of optical fiber and optical fiber cable to the control room, the light signal is converted into suitable for control and protection system of the digital signal. Typical arrangement of control cabinet and the man-machine interface. Protection and control function completely by VME bus computer software based on embedded controller function by software implementation. Software includes protection relays, programmable controller, system monitor and user interface module. Usually protection function of capacitor unbalance protection, capacitor overload protection, over voltage protection, fault protection platform, and continues to spark gap protection, MOV one-way energy accumulation protection, MOV energy accumulation protection, MOV rise speed protection, MOV over-current protection, MOV failure protection and harmonics
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