Method and computer device for calculating tidal current sensitivity to prevent system overload

Abstract

The invention discloses a method and computer device for calculating tidal current sensitivity to prevent system overload. The method comprises the following steps: S1, inputting the original data ofthe electric power network to construct the original electric power system network; S2, calculating the error amount of the PQ node and the PU node; 3, judging whether that convergence condition is satisfy; Satisfying the execution step S8; Otherwise, step S4 is executed; 4, calculating a Jacobian matrix and calculating a node voltage new value accord to that voltage correction value; 5, calculatethat reactive power output value of the PU node from the new value of the node voltage; 6, judging whether that reactive power output value exceeds the limit; Executing step S7 if the occurrence exceeds the limit; Otherwise, the new value of the node voltage is substituted into step S2 for execution; S7, taking the PU node whose reactive power exceeds the limit as a PQ node, taking the upper limit value or the lower limit value of the generator reactive power limit value as an initial value of the reactive power output value, and substituting the node voltage new value into the step S2 for execution; 8, calculate that network power flow result; S9: Calculate the sensitivity of power flow and output its calculated value. This method is of positive significance to prevent the system from overloading.

Description

technical field [0001] The invention relates to the technical field of power system analysis, in particular to a power flow sensitivity calculation method for preventing system overload, a computer device and a computer-readable storage medium. Background technique [0002] The operation of the power system is closely related to the construction of the national economy, so the country has always attached great importance to maintaining the stable operation of the power network. As early as the 1970s, faults such as line flow exceeding the limit and bus voltage imbalance were not prevented and dealt with in time, which caused the system to collapse many times, resulting in huge economic losses and even casualties. Therefore, the stability of power system operation has been widely concerned and has become one of the hot research topics in various countries. The coupling relationship between the network components of the power system is close. Therefore, for the current large-...

AI Technical Summary

Problems solved by technology

[0004] Usually, in the sensitivity analysis of the power system, it is often easy to ignore the output capability of the generator, which leads to the fact that the sensitivity does not match the actual situation when it is put into engineering application. This is because when the generator reaches the power output limit, the node injects reactive power The power remains constant, that is, the influence of the power injected by the generator on the power flow of the line does not change

Images