An Optimal Method for Combined Peak Shaving at Sending and Receiving Ends of DC Power Grid Considering Source-Net-Load Constraints

Abstract

An optimization method for combined peak regulation at the sending and receiving ends of the DC power grid that considers the constraints of the source network and the load can solve the "straight line" or "reverse peak shaving" transmission plan that often occurs in the existing technology, which brings problems to the peak regulation, frequency regulation and operation mode arrangement of the receiving end power grid. more difficult technical problems. The present invention firstly obtains the forecast data of the wind farm and the photovoltaic power station, and the power supply at the sending end of the power grid satisfies the power consumption of the local load. The lowest is the optimization objective, with power balance constraints, conventional generating set constraints, wind and solar curtailment constraints, DC tie-line constraints, and incentive demand-side response constraints as constraints, an optimization model is established to obtain the Operational power planning for energy-efficient equipment, HVDC tie-lines, and stimulated demand-side response at the receiving end. The invention not only reduces the energy cost of the user, but also improves the complementarity and synergy among various energy sources.

Description

technical field [0001] The invention relates to the technical field of peak regulation in electric power systems, in particular to an optimization method for combined peak regulation at sending and receiving ends of a DC power grid considering the constraint of source, network and load. Background technique [0002] With the rapid development of new energy sources such as wind power and photovoltaic power generation, my country has gradually formed a power supply pattern of reverse distribution and centralized grid connection. Incorporate the scope to realize the optimal allocation of resources across the country. New energy power generation has the characteristics of randomness, intermittency, and volatility. There is a strong coupling relationship between the power generation level of new energy bases and DC transmission power. Currently, DC transmission power planning mainly considers system constraints and transmission volume agreements, and seldom considers the receiving...

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Problems solved by technology

[0004] The present invention proposes a combined peak-shaving optimization method for the sending and receiving ends of the DC power grid that considers the constraints of the source network and the load, which can solve the problem that the prior art rarely considers the load demand of the receiving end power grid or coordinates the consideration of new energy output fluctuations and outgoing demand, which often leads to The emergence of "straight-line" or "anti-peak-shaving" transmission plans has brought more difficult technical problems to the peak-shaving frequency modulation and operation mode arrangement of the receiving-end power grid

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