Method for rapidly analyzing reactive power balance and critical power flow of power system

Abstract

The invention belongs to the power system field, and in particular relates to a method for rapidly analyzing reactive power balance and a critical power flow of a power system. The method comprises the following steps: first, according to a principle of hierarchical and regional balance of reactive power, rapidly analyzing the reactive power balance by fully using a quantitative relation between reactive power requirements and active power transmissions; then starting solving the critical power flow of the reactive power balance, wherein a m-in-and-n-out transformer substation is equalized to a one-in-and-one-out transformer substation, and then an equation of active power balance and an equation of the reactive power balance are written according to the one-in-and-one-out transformer substation, so as to calculate critical power flows of a incoming line and an outgoing line; and changing main-transformer load or a high-pressure-level injected power flow and solving the series critical power flow, so as to get a curve in which the critical power flow varies according to the main-transformer load (or the high-pressure-level injected power flow), thereby improving applicability of research conclusions.

Description

technical field [0001] The invention belongs to the field of electric power systems, and in particular relates to a fast analysis method for reactive power balance and critical power flow of electric power systems. Background technique [0002] The reactive power balance of the power system plays a vital role in the safe and stable operation of the entire power system. The reactive power balance of the power system is closely related to the voltage stability of the power system. The analysis method of the reactive power balance of the power system is the reactive power compensation device of the power system. The basis of control is the basis for integrating reactive power and voltage and achieving the purpose of optimal control. [0003] The condition of reactive power balance in the power system is: the reactive power that may be emitted by the reactive power source in the power system should be greater than or at least equal to the sum of the reactive power required by th...

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Problems solved by technology

This method often leads to double counting of the low-capacity compensation capacity in the substation, so i

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