E-STATCOM-based forced power oscillation suppression method and system

Abstract

The invention discloses an E-STATCOM-based forced power oscillation suppression method and system, and further discloses an E-STATCOM-based forced power oscillation suppression system. The E-STATCOM-based forced power oscillation suppression system comprises a signal collection module, wherein an input end of the signal collection module is connected with a left power transmission line and a right power transmission line, which are connected with an E-STATCOM mounting bus, respectively; an output end of the signal collection module is connected with the input end of a control signal selection module; the output end of the control signal selection module is connected with the input end of an oscillation identification module, the input end of a reactive power control module and the input end of an active power control module respectively; the output end of the oscillation identification module is connected with the input end of the reactive power control module and the input end of the active power control module respectively; and the output end of the reactive power control module and the output end of the active power control module are connected with an E-STATCOM. Manual operation is not needed; and the E-STATCOM-based forced power oscillation suppression method and system have good suppression effects on forced power oscillation.

Description

Technical field [0001] The invention relates to the technical field of power system stability and control, in particular to an E-STATCOM-based method and system for suppressing forced power oscillation. Background technique [0002] Under the basic pattern of power transmission from west to east and north-south interconnection, my country will gradually form a large-scale interconnected power grid across the country, which makes the problem of power oscillations in the power system increasingly prominent. The traditional power oscillation is mainly the low-frequency oscillation of the negative damping mechanism caused by insufficient system damping, and its suppression measures are to improve the system damping. However, in recent years, some power oscillations cannot be explained by the negative damping mechanism. These oscillations still occur even when the system damping device is installed. Research has found that these oscillations are forced power oscillations, which are ca...

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Problems solved by technology

These methods need to be operated by the controller after the oscillation occurs for a certain period of time, and the forced power oscillation starts quickly, so if the operation is not timely, it may lead to the expansion of the scope of the accident

In addition, because the power disturbance source location technology in the actual system is not very mature, it is also difficult to find the disturbance source in time and accurately for control.

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