Online emergency control decision-making method considering transient state and static state security and stability constraint

Abstract

The invention discloses an online emergency control decision-making method considering transient state and static state security and stability constraint, and belongs to the security and stability emergency control technical field of the electric power system. For overcoming the problems that multiple kinds of problems exiting in the security and stability of the large power grid are mingled, and the online decision-making time is short, different types of control measures are chosen specific to different kinds of problems exiting in security and stability; the control measures of each type are screened based on the control performance indexes separately; the screened measures of different controllable equipment are enumerated and combined; the enumerated and combined measures are screened through the power sensitivity based overload security verification and power frequency characteristic based transient state frequency security verification; and finally, the screened enumerated and combined measures are subjected to transient state and static state security and stability quantitative evaluation by adopting a cluster computing mode. The calculation strategies are classified and sequenced specific to the problems exiting in security and stability, so that the rapid and optimized decision making of the online emergency control considering the transient state and static state security and stability constraint is realized.

Description

technical field [0001] The invention belongs to the technical field of safety and stability emergency control of electric power system. More precisely, the invention relates to a method for optimizing decision-making of large power grid online emergency control considering transient state and static safety and stability constraints. Background technique [0002] The operation status of the large power grid is changeable, the safety and stability characteristics are complex, and multiple types of safety and stability problems are intertwined. It is difficult to design a control strategy that can ensure the safety and stability of the power grid without considering the control cost. It is urgent to adopt the online control mode to improve the pertinence of the control strategy, ensure the safety and stability of the power grid operation, and effectively reduce the control cost. [0003] The calculation speed of control decision-making is one of the key indicators of whether on...

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Problems solved by technology

[0007] The purpose of the present invention is: in view of the variable operating state of the AC-DC hybrid large power grid (including asynchronously networked large power grid), complex security and stability characteristics, intertwining of multiple types of security and stability problems, and wide impact of security and stability problems, it is urgent to adopt an online control mode to To support the actual needs of the safe and stable economic operation of large power grids, provide an online emergency control decision-making method that takes into account transient and static security and stability constraints, and meet the requirements of diverse control methods, wide control range, high control precision and low control cost Under the condition of online control, the requirement of calculation speed for control decision-making is met

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