Rapid and safe correction method for power system containing UPFC

Abstract

The invention discloses a rapid and safe correction method for a power system containing a UPFC, and the method comprises the following steps: A, obtaining a node adjustment state and a node adjustment state range of the power system containing the UPFC during operation, and enabling the node adjustment state range to be a node set participating in adjustment; B, based on the node adjustment staterange, adopting a pre-established safety correction model of the node to perform correction calculation, wherein the input of the safety correction model comprises a node adjustment state, and the output of the safety correction model is the adjustment amount of each device in the optimization space; C, correcting the power system containing the UPFC according to the adjustment amount, and verifying whether each node and each branch meet the safe and stable operation condition of the system or not after correction; and if the safe and stable operation condition of the system is not met, repeating the steps A to B until the safe and stable operation condition is met, and outputting the adjustment amount of the node. According to the invention, the power system containing the UPFC can be accurately and rapidly corrected.

Description

technical field [0001] The invention relates to a fast and safe calibration method for a power system containing UPFC, belonging to the field of power system calibration. Background technique [0002] Power system safety correction is an adjustment strategy to achieve the purpose of eliminating limit violations by injecting active and reactive power into relevant nodes. Therefore, when the voltage exceeds the limit or the branch power flow exceeds the limit during the operation of the power system, causing power flow transfer or even a large-scale ripple trip, quickly formulate and adopt a safety correction strategy, and give full play to the control ability of UPFC, which is very important for ensuring the safety of the power grid. Running is important. At present, the research on security correction of actual power systems considering UPFC is still in its infancy. The current calculation methods for safety correction are mainly divided into two categories: sensitivity me...

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Problems solved by technology

The current calculation methods for safety correction are mainly divided into two categories: sensitivity method and optimization planning method. The sensitivity method is used for safety correction, which has a high solution efficiency. The sensitivity method often ignores the influence of reactive power, so the sensitivity method is not applicable to the safety correction problem of the UPFC system

At present, some studies have proposed to use the optimization method to adjust the safety correction strategy of the UPFC system and take the minimum amount of generator and load adjustment as the objective function. However, due to the large number of iterations and the long calculation time, it cannot meet the requirements of rapid adjustment and elimination of limit violations. purpose, and this method may not converge when the number of network nodes increases and the number of optimization variables increases

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