A variable series reactance dynamic voltage regulation reactive power compensation method and its device

Abstract

The invention relates to a dynamic voltage-adjustment reactive compensation technology, in particular to a variable series-connection reactance dynamic voltage-adjustment reactive compensation method and device. The variable series-connection reactance dynamic voltage-adjustment reactive compensation method includes the steps of setting a series-parallel connection assembly for a variable electric reactor and a capacitor and connecting the series-parallel connection assembly into a load side inlet; detecting the voltage offset and operation conditions of the outlet end and the power factor of the inlet end of the assembly in real time; dynamically controlling the parameters of the variable electric reactor and the capacitor in series-parallel connection according to the voltage offset and operation conditions of the load side and the power factor on a power grid side, and enabling the voltage on the load side to reach the standard and the power factor on the power grid side to be improved. The variable series-connection reactance dynamic voltage-adjustment reactive compensation device comprises a series-parallel connection unit for the variable electric reactor and the capacitor, a load voltage offset and power grid reactive vacancy detection unit, a dynamic voltage-adjustment and reactive power compensation control unit, a dynamic voltage-adjustment and reactive power compensation execution unit and an element and device protecting unit. The variable series-connection reactance dynamic voltage-adjustment reactive compensation method and device can be used for controlling low voltage, improving electricity quality, reducing losses, saving energy and improving power supply reliability and electricity utilization rate, and have the advantages of being safe, being environmentally friendly, saving energy and increasing the effect.

Description

technical field [0001] The invention relates to a dynamic voltage regulation reactive power compensation technology, in particular to a variable series reactance dynamic voltage regulation reactive power compensation method and a device thereof. Background technique [0002] With the acceleration of urban and rural construction and the strengthening of national energy-saving policies, the living standards of urban and rural residents have been significantly improved, and the electricity load has increased rapidly. Quality decline, low power supply reliability, frequent faults, high line loss, insufficient local power supply capacity, low voltage at the end of some long lines to the point that electrical equipment cannot work normally, and high nighttime 10kV bus voltage in some substations, even serious Exceeding the standard, crisis power grid and safe operation of power distribution equipment and other issues. The existence of these problems makes the electrical equipment...

AI Technical Summary

Problems solved by technology

[0005] The series fixed reactance technology does not boost the voltage significantly, and cannot achieve dynamic voltage regulation, and the power factor cannot be guaranteed

[0006] The series variable reactance technology can realize voltage regulation, but the power factor cannot be guaranteed to meet the requirements while regulating voltage

[0007] Parallel fixed capacitor technology has a strong reactive power compensation capability, and has the function of raising the voltage under certain conditions, but the range of voltage adjustment is very narrow, and the voltage cannot be lowered.

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