Design and application of dynamic reactive power compensation device for power system based on magnetically controlled reactor Abstract: By analyzing the shortcomings of existing voltage and reactive power integrated control devices, a new dynamic reactive power compensation scheme based on magnetically controlled reactor is proposed. The principle and characteristics of magnetically controlled reactors are introduced, and the control principle of dynamic reactive power compensation device based on magnetically controlled reactors and its operation effect in power system are explained. Finally, it is pointed out that the dynamic voltage reactive power regulation scheme based on magnetically controlled reactors is in line with the development direction of power system and has good development prospects. Keywords: dynamic reactive power compensation; magnetically controlled reactor (MCR); controllable reactor; voltage stability; power system 1 Introduction With the increasing load of the system and the gradual increase of voltage level, the demand for reactive power in the power system has also changed. From the previous need to compensate only capacitive reactive power to the need to compensate capacitive and inductive reactive power, and it is required to be able to adjust continuously. Specifically, it is required to provide more capacitive reactive power during the peak load period to meet the reactive power demand of industrial and mining enterprises and stabilize the system voltage; on the other hand, it is required to provide inductive reactive power to balance the charging power of a large number of cables when light load is applied to ensure that the system voltage is not too high. Traditional switched capacitors (such as fixed capacitors, switch switched capacitors, thyristor switched capacitors, etc.) have played an important role in maintaining the voltage stability of the power system for a long time, but due to some shortcomings such as step-by-step compensation, inability to provide both inductive and capacitive reactive power, and frequent switching of switches, they no longer meet the higher requirements of the power system. Therefore, there is an urgent need for a new reactive power compensation solution that can provide both inductive and capacitive reactive power and can be continuously adjustable within the range of inductive and capacitive reactive power.
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