Distribution calculation method for stable control on global voltage of power transmission/distribution grid

Abstract

The invention discloses a distribution calculation method for stable control on a global voltage of a power transmission / distribution grid. Aiming at a power transmission / distribution grid of a multi-stage scheduling center layered management structure, the method has a target of minimum total control cost of the power transmission / distribution grid, and boundary influence factors are introduced to decompose global optimization problems into sub-problems of stable control on voltages of a power transmission grid and different power distribution grids; by continuously switching voltages, equivalent value power and the boundary influence factors at boundary connecting points of the power transmission / distribution grid, distribution calculation of global control can be achieved; since the boundary influence factors need to be constructed by antithesis multipliers in different sub-problem optimization solutions, the sub-problems of stable control of the power transmission / distribution gridneed to be solved by using antithesis multiplier type optimization control algorithms. Equivalent value models of power transmission grids or power distribution grids do not need to be established, and stable voltage control distribution calculation of power transmission / distribution grids can be achieved by only exchanging a small amount of boundary node information.

Description

technical field [0001] The invention relates to the technical field of power system stability analysis and control, in particular to a distributed computing method for global voltage stability control of transmission and distribution networks. Background technique [0002] In recent years, the development of my country's power grid has shown the coexistence of UHV AC-DC hybrid connection, long-distance AC-DC transmission, large-scale collection of intermittent new energy into the transmission network, and small-capacity decentralized access to the distribution network. This raises new problems for the economical operation and safety and stability of the power system, one of which is the problem of voltage stability. Voltage stability analysis includes three tasks: calculation of stability index, fast predictive fault screening and sorting, and optimization control to improve stability margin. Among them, voltage stability control is the ultimate goal of voltage stability an...

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Problems solved by technology

The second type of technology is more suitable for solving the single flow state stability control problem studied in the present invention, but the above documents only focus on the preventive control problem of the transmission network, and do not take into account the influence of the distribution network

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