Adjusting method for dynamic reactive compensation controller

Abstract

The invention discloses an adjusting method for a dynamic reactive compensation controller. The adjusting method comprises the following steps: firstly, collecting the busbar current of a three-phase system, the busbar voltage of the three-phase system and the current of a three-phase thyristor controlled reactor in real time; then carrying out closed loop proportional-integral-differential (PID)adjustment on the current of the three-phase thyristor controlled reactor according to the compensated admittance of each parallel branch, and outputting the triggering angle of the thyristor controlled reactor; simultaneously, carrying out closed loop PID adjustment on the busbar voltage of the three-phase system, and outputting the triggering angle of the thyristor controlled reactor; and finally, according to whether each phase of voltage is in a specific range or not, judging whether to adopt the closed loop PID adjustment of the second step or the third step, and outputting the actual triggering angle of the thyristor controlled reactor. The method provided by the invention can increase the power factor, reduce the reactive power, decrease the line loss, improve the transmission capacity of the active power of a power transmission line, stabilize the busbar voltage, and inhibit the voltage fluctuation and flicker.

Description

[technical field] [0001] The invention relates to an adjustment method for a dynamic reactive power compensation controller. [Background technique] [0002] The control method of the static dynamic var compensator in the power system is the core technology of the static dynamic var compensation device, and it is also the key to the stable operation of the device. The role of the static dynamic reactive power compensation device in the power system is: [0003] 1. Filter out system harmonics, improve power factor, and suppress three-phase unbalance; [0004] 2. Maintain a stable voltage in a weaker power system; [0005] 3. Suppress voltage fluctuation and flicker caused by impulsive reactive load; [0006] 4. Improve the transient stability of the transmission system; [0007] 5. Improve the voltage stability of the power receiving system; [0008] 6. Suppress power oscillation; [0009] 7. Adjust the voltage of long-distance transmission lines to reduce transmission l...

AI Technical Summary

Problems solved by technology

However, due to the complexity of the system itself, it is often difficult to balance the above goals

Traditional SVC reactive power compensation devices often set control strategies according to specific requirements. When the control target is to maintain system voltage stability, it is difficult to take power factor into account. When the control target is to increase power factor and reduce reactive power, it is difficult to consider the busbar When the voltage is stable

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