Safety correction calculating method based on regional load control

Abstract

The invention discloses a safety correction calculating method based on regional load control; in order to solve the problem that power grid correction control is unable to be adjusted through unit output while direct-current locking of an extra-high voltage alternating-current and direct-current hybrid grid leads to large-scale power loss failure, the adjustability of load is made full use to provide safety correction control and the requirement for safety operation of a scheduling system is met. According to the characteristic that a grid layerwise and regional operation and scheduling system executes load control centrally for targets according to regional load, the safety correction calculating method based on regional load control is provided, regional load shredding quantity acts as an objective, regional load serves as a control object, system tidal flow restraints, regional controllability load restraints and stable sectional safety restraints are considered, and solving is performed by continuous tidal flow method and route planning method combined; the method provided herein has the advantages of good model simplicity, proneness to solving and good convergence, and is applicable to practical scheduling as important reference basis for scheduling control load.

Description

technical field [0001] The invention relates to the technical field of power system power flow calculation, in particular to a safety correction calculation method based on partition load control. Background technique [0002] With the construction of UHV AC-DC and the operation of AC-DC hybrid power grid, the operating characteristics of the power grid have undergone fundamental changes. If a large-scale power loss or load loss occurs, it will have a greater impact on the safe and stable operation of the power grid, especially When the UHV DC is running at full power, if a sudden failure has a greater impact on the safe and stable operation of the power grid, it will cause a large-scale change in the power flow of the power grid, which will directly cause the line and stable section to fail to meet the thermal stability limit. [0003] In order to quickly eliminate the power flow exceeding the limit, the traditional unit adjustment alone cannot meet the power grid correctio...

AI Technical Summary

Problems solved by technology

[0002] With the construction of UHV AC-DC and the operation of AC-DC hybrid power grid, the operating characteristics of the power grid have undergone fundamental changes. If a large-scale power loss or load loss occurs, it will have a greater impact on the safe and stable operation of the power grid, especially When the UHV DC is running at full power, if a sudden failure has a greater impact on the safe and stable operation of the power grid, it will cause a large-scale change in the power flow of the power grid, directly causing the line and the stable section to fail to meet the thermal stability limit

[0003] In order to quickly eliminate the power flow exceeding the limit, the traditional unit adjustment alone cannot meet the power grid correction control requirements in an emergency state, and it is necessary to carry out rapid load control and participate in active power regulation through dispatching and unified command. means

[0004] With the further expansion of the scale of the power grid, UHV DC faults have a great impact and complex characteristics. The method of manual handling by dispatchers alone can no longer meet the requirements of safe operation of large power grids. Dispatchers must be able to determine detailed control schemes for load control , and at the same time have a clearer grasp of the operating status of the power grid after load control. The existing dispatching system uses the load group control function as an emergency response method, which is based on offline programming, and the actual control accuracy is not enough.

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