Alternating current and direct current interconnected power system decentralized robust optimization scheduling method

Abstract

The invention discloses an alternating current and direct current interconnected power system decentralized robust optimization scheduling method, which comprises the following steps: constructing operation constraints according to the operation characteristics of a direct current tie line; constructing an upper-layer coordination optimization model and a lower-layer robust optimization model, wherein the lower-layer robust optimization model establishes a double-layer iterative solution framework based on a target cascade analysis method, and then a column sum constraint generation algorithm is introduced to carry out conversion processing and solution on the two-stage robust optimization model of each interconnection subsystem; feeding the active plan of the virtual unit back to the upper-layer coordination optimization model; enabling the upper-layer coordination optimization model to optimize and update a direct-current tie line power transmission scheme according to the virtual unit active plan obtained by optimization of the lower-layer robust optimization model, and transmit an optimization result as a reference value of next optimization back to the lower-layer robust optimization model; and carrying out iterative interactive solution on the upper and lower double-layer models until a convergence standard is met, and stopping iteration. According to the invention, joint optimization of the scheduling plan and the standby scheme of the large-scale alternating current and direct current interconnection system can be realized.

Description

technical field [0001] The invention relates to the technical field of power grid control, in particular to a decentralized robust optimal scheduling method for an AC-DC interconnected power system. Background technique [0002] A clean power system with a high proportion of wind power has become the common vision of the industry. With the large-scale access of new energy, the local consumption capacity in some areas is limited, and it is no longer possible to completely consume local new energy power generation. Promoting cross-regional consumption of new energy is an important measure to solve the problem of new energy consumption through cross-regional transactions through cross-regional contact lines. With the continuous deepening of AC and DC interconnection in different regional power grids and the rapid development of wind power, it is urgent to realize the coordination and optimization of interconnected regional power systems. [0003] On the one hand, with the inc...

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Problems solved by technology

[0003] On the one hand, with the increase of interconnection scale, centralized joint scheduling faces the problems of large data dimension and complex and changeable models, and it is difficult to apply to the actual operation framework of hierarchical partitions and meet the information privacy of different subjects in the market environment Require

[0004] On the other hand, the current research on the cross-regional consumption of new energy DC is mostly focused on the optimization of the transmission components of the DC line, the participation of the DC line in two-region peak regulation, and the coordination between the DC line and the two regions. Resources should deal with the impact of new energy forecast uncertainty in the two regions on the cross-regional consumption of new energy. At the same time, power generation plans and power interaction plans that ignore the uncertainty of new energy may waste new energy cross-regional consumption in actual operation. Advantage

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