Optimization method of proportion of high proportion renewable energy in transmission and distribution network under cooperative access

Abstract

The invention relates to a method for optimizing the proportion of high-proportion renewable energy under the cooperative access of transmission and distribution network, which comprises the followingsteps: 1) acquiring basic data; 2) clustering based on that basic data to obtain a typical plan scene; 3) for that typical plan scenario, establishing a collaborative planning model of transmission and distribution network, The objective of the collaborative planning model is to minimize the cost. The constraints include the independent constraints of the transmission and distribution network andthe collaborative constraints of the transmission and distribution network. The decision variables include the investment capacity of renewable energy units in the transmission and distribution network, the power generated by conventional units, the discarded energy power of renewable energy sources and the load shedding power of renewable energy units. 4) solving that transmission and distribution network collaborative planning model to obtain the optimal renewable energy investment capacity scheme; 5) obtaining the optimal distribution ratio of the high-proportion renewable energy in the transmission and distribution network based on the optimal renewable energy investment capacity scheme. Compared with the prior art, the invention has the advantage of high accuracy, strong practicability and high efficiency.

Description

technical field [0001] The invention relates to the technical field of power system planning, in particular to a ratio optimization method for high-proportion renewable energy under coordinated access to a transmission and distribution network. Background technique [0002] The increasingly serious energy crisis and environmental pollution have made the energy production and consumption based on traditional energy unsustainable. Renewable energy represented by wind energy and solar energy is gradually becoming an important choice for the sustainable development of human energy. It is estimated that by 2050, China's total power generation will reach 15.2 trillion kwh, of which renewable energy such as hydropower, wind power, and solar energy will account for 85.8% of the total power generation, and a high proportion of renewable energy grid-connected will become the future power system important features. The randomness and intermittency of a high proportion of renewable ene...

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Problems solved by technology

Although this method optimizes the power supply ratio, it does not consider the constraints on the grid side, so there are still deviations in actual operation

The above patents are only for the research of the transmission network, and do not involve the collaborative optimization between the transmission and distribution networks, so they cannot meet the flexibility requirements under the high proportion of renewable energy access

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