A method and system for power grid dispatch optimization based on wcvar risk analysis

Abstract

The invention discloses a power grid scheduling optimization method and system based on WCVaR risk analysis, and belongs to the technical field of photovoltaic power station energy management. Including: constructing multiple photovoltaic output power samples, and then determining the electricity price for selling photovoltaic excess capacity to the grid; randomly initializing multiple sets of multiplier coefficients to obtain bidding plans for multiple photovoltaic charging and swapping systems to be reported to the grid; constructing a WCVaR-based grid operation model, and solve the grid scheduling plan and grid node marginal price plan; further calculate the revenue of the photovoltaic charging and swapping system; update the multiplying factor of all groups, and then update the bidding plan; repeat the above operations until the preset number of times is reached, and the final output is The obtained grid scheduling scheme. The invention can provide certain reference value for the decision makers of the power grid to formulate the dispatching scheme; the dispatching scheme obtained by considering the WCVaR risk can better adapt to the worst situation, avoid the risk of income, that is, the occurrence of low income or loss, and improve the operation of the power grid. economy.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power station energy management, and more particularly 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) has 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 has also developed rapidly. In addition, countries around the world are vigorously developing renewable energy, which makes the charging and replacing system with photovoltaic (PV) access come into being. However, since the photovoltaic charging and swapping system provides charging and swapping services for EVs, it will inevitably interact with the power grid. In the process, according to...

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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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