Electric power system safety and stability emergency control method based on two-stage remedial strategy

Abstract

The invention discloses an electric power system safety and stability emergency control method based on a two-stage remedial strategy, and belongs to the field of electric power system safety and stability control. A safety and stability sensitivity comprehensive factor and a control cost calculation formula of a control measure are added into the control strategy table designing to meet the requirement for safety and stability optimizing control. Under the condition that a control order is not actually executed, a control station selects an optimizing control measure from the control measure space of the control station in an iteration mode to carry out the remedy control in a precedence mode, and a last-level collaborative defense control station of the control station selects the optimizing control measure in the control measure space of the collaborative defense control station to carry out the remedy control; under the condition that the control station does not have the control measure, the last-level collaborative defense control station selects the optimizing control measure to implement the remedy control, and therefore the two-stage remedy control according to the non-implementation of the control order and the insufficient single-control station control measure is achieved. The reliability of the safety and stability emergency control can be effectively enhanced.

Description

Technical field [0001] The invention belongs to the field of power system safety and stability control. More precisely, the invention relates to a power system safety and stability emergency control method based on a two-level remedial strategy. Background technique [0002] As the second line of defense for the power grid, the safety and stability emergency control system has its reliability self-evident. The existing safety and stability emergency control system is controlled according to the control strategy table. When the station-side control device of the safety and stability emergency control system detects that the power flow of the components preset in the control strategy table (including If the power flow of the transmission channel composed of multiple components reaches the set range and / or the expected failure, it will be searched from the control strategy table based on the power grid’s component startup and shutdown, the operation status of the control measures an...

AI Technical Summary

Problems solved by technology

[0005] In addition, regarding the control effect of the control measures, the existing control strategy table design only considers the sensitivity factor of the control measures in the emergency control of the power flow exceeding the limit of the component or the power flow of the transmission channel combined with multiple components. The sensitivity factor In fact, it is the power sensitivity of the control measures to the power flow of the components or the power flow of the transmission channel, but for other safety and stability issues, the sensitivity factor is not considered; Regarding the economy of the control measures, the existing control strategy table design adopts the priority of the control measures level, without considering the cost of control

Images