Selection method of dynamic reactive power compensation configuration point

The invention provides a method that the system strength and the degree of impact on a system due to a fault are measured through the direct current multi-infeed short circuit ratio after the direct current receiving end grid is failed and a dynamic reactive power compensation configuration point can be ensured, namely, a selection method of the dynamic reactive power compensation configuration point. The selection method of the dynamic reactive power compensation configuration point comprises the following steps: building a mold; ensuring a contact line of a direct current receiving system, a direct current receiving inverter station and an alternating current system and enumerating and predicating system status collection after fault; calculating the direct current multi-infeed short circuit ratio; predicating the weak point of voltage stability; conducting simulation verification. When the result of the simulation verification is the weak point of the voltage stability, a dynamic reactive power compensation device is configured. By means of consideration of the state of the system after the fault and the influence of the fault on the system, the selection method of the dynamic reactive power compensation configuration point compensates the influence of the multi-infeed short circuit which is used as an index obtained through a static calculation on the fault transient state procedure and on the system and overcomes the defect that consideration of the status of the system after the fault is not enough, and the calculation is simple and convenient.