Power grid dispatching optimization method and system based on WCVaR risk analysis

Abstract

The invention discloses a power grid dispatching optimization method and system based on WCVaR risk analysis, and belongs to the technical field of photovoltaic power station energy management. The method comprises the steps: constructing a plurality of photovoltaic output power samples, and then determining the electricity price for selling photovoltaic excess capacity to a power grid; randomly initializing a plurality of groups of multiplying power coefficients to obtain a bidding scheme reported to a power grid by a plurality of photovoltaic charging and battery swapping systems; constructing a power grid operation model based on WCVaR, and solving to obtain a power grid dispatching scheme and a power grid node marginal price scheme; further calculating the earnings of the photovoltaic charging and battery swapping system; updating the multiplying power coefficients of all the groups, and then updating the bidding scheme; repeating the operation until a preset number of times is reached, and outputting a finally obtained power grid dispatching scheme. According to the invention, a certain reference value can be provided for a decision maker of a power grid to formulate a scheduling scheme; the scheduling scheme obtained by considering the WCVaR risk can better adapt to the worst situation, the income risk, namely the low income or loss situation, is avoided, and the economical efficiency of power grid operation is improved.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power station energy management, and more specifically, relates to a power grid scheduling optimization method and system based on WCVaR (worst-case conditional value-at-risk, worst-case conditional value-at-risk) risk analysis. Background technique [0002] According to statistics, in 2019, the global sales of electric vehicles (EV) have exceeded 2.1 million, and the EV inventory has reached 7.2 million. At the same time, the charging and swapping system that provides charging and swapping services for EVs is also developing rapidly. In addition, countries all over the world are vigorously developing renewable energy, which makes charging and swapping systems with photovoltaic (photovoltaic, PV) access emerge as the times require. However, since the photovoltaic charging and swapping system provides charging and swapping services for EVs, it will inevitably interact with the power grid. In...

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Problems solved by technology

[0004] Aiming at the high degree of autonomy of the microgrid and the uncertainty of new energy output, Zhang Hong et al. ("Microgrid supply-demand coordination two-stage day-ahead optimization scheduling considering WCVaR assessment") proposes that from the perspective of grid-connected microgrid operators A two-stage day-ahead optimization scheduling framework for supply and demand coordination

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