A tracking closed-loop control method and system for power grid safety auxiliary decision-making

Abstract

The invention discloses a tracking closed-loop control method and system for power grid safety auxiliary decision-making, belonging to the technical field of on-line safety and stability calculation and analysis of power systems. The method of the invention includes: generating a set of control objects and recording the initial state of each control object in the set; generating a set of adjustment devices and recording the initial state of each adjustment device in the set; determining the adjustment measures of each control object in the set of control objects Sub-collection; track each adjustment device in the adjustment measure sub-collection, make adjustments, and record the adjustment implementation; determine whether each control object is in place according to the preset threshold; obtain the load rate of each control object that is in place, and perform Tracking closed loop control. The invention realizes the tracking evaluation of the control object of the power grid.

Description

technical field [0001] The invention relates to the technical field of on-line security and stability calculation and analysis of power systems, and more particularly, to a tracking closed-loop control method and system for power grid security auxiliary decision-making. Background technique [0002] With the gradual formation of the UHV AC-DC hybrid grid pattern in my country, the safety and stability characteristics and mechanisms of the power system are becoming more and more complex, and the difficulty of power grid operation control is increasing. Require. As an important link in the construction of "big operation" in the "three sets and five" of the State Grid Corporation, the State Grid Corporation headquarters has carried out the construction of the smart grid dispatching control system since 2009, in which the online security analysis, early warning and auxiliary decision-making functions have been gradually implemented. Deployment and implementation of power grid co...

AI Technical Summary

Problems solved by technology

[0005] Combined with the requirements, the current load shedding control is configured according to specific operating conditions, and cannot be applied to all operating conditions; it is generally formulated based on a single or multiple electrical quantities, and does not fully consider the interaction of various emergency load shedding measures in multiple regions. Influence and control coordination; the accident level evaluation requirements are not comprehensively considered in the emergency load shedding control, and it is difficult to adapt to the operation control requirements of the future AC and DC power grids

In addition, various load reduction methods are considered independently, lacking a unified and effective centralized monitoring method, and various load reduction measures are cross-configured. For example, the lines cut by the second and third lines of defense overlap, resulting in "empty cut" in the third line of defense. , making it difficult for the configured emergency load shedding measures to play the expected role, and cannot guarantee the safe operation of the power grid

Secondly, under the new situation of increasingly close electrical connections in the power grid, more complex coupling relationships between sections, and interactive influences on safety and stability levels, the mutual influence of various emergency load reduction measures in multiple regions and multi-dispatch depends only on the operation control within the jurisdiction. It is difficult to effectively solve the problem of power grid security and stability, and it is even more difficult to achieve the optimization of control measures

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