Online simulation method for feedback type overload intertripping safety control device control strategy

Abstract

The invention discloses an online simulation method for a feedback type overload intertripping safety control device control strategy. The method comprises the steps of analyzing and extracting basiccharacteristics of an overload intertripping safety control device control strategy, and identifying overload intertripping controllable measures and controllable capacity suitable for a current powergrid state according to an on-off state of device monitoring equipment and an anticipated fault based on the basic characteristics of the control strategy and the actual operation condition of the power grid; based on post-failure power flow calculation, determining an overload intertripping controllable measure set of which the section power flow is greater than a control target, sequentially splitting the overload intertripping controllable measures into different executable measures according to turns, and sorting according to action delay from small to large; determining an executable measure set under different action delays; determining the power grid operation state after the control measures act according to the executable control measures and the controllable capacity which meetthe action conditions; and determining the power flow of each control section after the overload intertripping strategy is considered through power flow calculation. According to the invention, effective criteria can be provided for scheduling operation mode personnel to identify the rationality, accuracy and adaptability of the control strategy of the overload intertripping safety control device,the power grid scheduling operation risk is effectively reduced, and the method has good application value.

Description

technical field [0001] The invention belongs to the technical field of electric power system automation, and in particular relates to an online simulation method for the control strategy of a feedback type overload-connected safety control device. Background technique [0002] In recent years, with the continuous expansion of the scale of my country's UHV AC-DC hybrid power grid, the characteristics of the power grid have become more complex, especially the characteristics of DC-intensive sending end, DC multi-infeed receiving end, and strong direct and weak AC. The technical level of power grid operation And the complexity is getting higher and higher, and there are more and more factors that induce complex faults in the power grid. The correct handling of complex faults in the power grid puts forward higher requirements for power regulation, and the safe and stable operation of the power system is facing a huge challenge. [0003] In order to consolidate the second and thir...

AI Technical Summary

Problems solved by technology

Safety and stability control is a kind of online simulation method for the control strategy of feedback-type overload and safety control device with various types, complex composition, large regional differences, and strong functional pertinence. a difficulty of

At the same time, the off-line control strategy of the safety and stability control system is generally formulated according to typical methods and manual experience. In actual operation, due to the unreasonable setting of the setting value, the control amount of the safety and stability control strategy is insufficient or does not match the actual operation mode, resulting in the power grid. Safe and stable, and even induce blackouts

The constant changes of the power grid structure and the hysteresis of the formulation of the offline strategy table, whether the existing security and stability control strategies can adapt to the new changes or whether there is a better solution are all issues worth studying.

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