Optimal Allocation Method of Reactive Power Instructions for Provincial Joint Commissioning and Provincial Commissioning Under the Constraint of Minimum Adjustment Amount

Abstract

The invention discloses a reactive power instruction optimal allocation method for a province dispatcher of a province and local combined dispatcher under constraint of minimum adjustment quantity. The method comprises the following steps of (1) assuming that a certain local dispatcher has Z regions and M main transformers, wherein main transformers of gateways of a first region to K(th) regions run at a high-voltage side, a medium-voltage side and a low-voltage side in splitting operation conditions, the corresponding main transformers are Tr<Split_1> to Tr<Split_M>, main transformers of gateways of (K+1)th region to Z(th) region run in parallel at the high-voltage side and run at the medium-voltage side and the low-voltage side in splitting operation conditions, and the corresponding main transformer set is {Tr<Parallel_k>, 1, Tr<Parallel_k>, 2}; (2) counting reactive power reserve quantity of the main transformer of each gateway; (3) carrying out reactive power optimization by the province dispatcher, and issuing a target value; (4) receiving a reactive power target value of the gateway of the dispatcher on time; and (5) regulating a reactive power device in an administrative region to achieve an adjustment target of the province dispatcher by a local dispatcher according to the voltage reactive power target value issued from the province dispatcher. By the method, the adjustment target can be enabled to be achieved by minimum action frequencies within the shortest time during the process of province and local combined dispatching, and adjustment oscillation is prevented.

Description

technical field [0001] The invention relates to an optimal distribution method of reactive power commands under the constraints of minimum adjustment amount in an automatic voltage control system (AVC), which belongs to the technical field of power system operation and control. Background technique [0002] The characteristic of my country's power grid is that it is divided into different levels of regional power grids according to different provinces, prefectures, and county administrative regions. The county-level power grid (county dispatching) within the county. The three-level power grid mainly manages 500kV power grid, 220kV and 110kV power grid, and 66(35)kV power grid respectively. The three levels of power grids are tightly coupled, but the control system is distributed and exists in the three-level dispatching system. In order to solve the AVC of different regional power grids The multi-level coordinated control of the system is a hierarchical, layered, and complex...

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Problems solved by technology

The three-level power grid mainly manages 500kV power grid, 220kV and 110kV power grid, and 66(35)kV power grid respectively. The three levels of power grids are tightly coupled, but the control system is distributed and exists in the three-level dispatching system. In order to solve the AVC of different regional power grids The multi-level coordinated control of the system is a hierarchical, hierarchical, and complex distributed hierarchical optimization control problem, which requires the use of AVC coordinated control

After searching, there is still no allocation method for the reactive power command of the AVC provincial joint commissioning and provincial commissioning and the reactive power target value of the main transformer at the gateway in China.

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