Microgrid group multi-stage optimization planning method considering load uncertainty

A micro-grid group and optimal planning technology, which is applied to load forecasting, electrical components, circuit devices, etc. Multi-stage research has not yet been carried out and other issues, to achieve the effect of achieving coordinated development and improving robustness

Pending Publication Date: 2021-06-11
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

[0007] At present, there are the following problems or gaps in the planning research of the microgrid group system: 1) Insufficient consideration of multi-stakeholders in the planning stage, and the maximization of the respective benefits of the distribution network and the microgrid group; 2) The multi-stage load development research not yet underway

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  • Microgrid group multi-stage optimization planning method considering load uncertainty
  • Microgrid group multi-stage optimization planning method considering load uncertainty
  • Microgrid group multi-stage optimization planning method considering load uncertainty

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Embodiment 1

[0150] Under the environment that my country is gradually opening up the power market on the distribution side, the microgrid group joins the distribution network in an independent capacity to conduct power transactions, forming multiple stakeholders. In order to realize the equalization of benefits of different stakeholders, this embodiment proposes the best long-term planning method for microgrid groups, and establishes a master-slave game planning model between microgrid groups and distribution networks. To solve the problem of multi-stage load growth uncertainty under long-term planning, this embodiment adds a two-stage robust optimization to the master-slave game model to improve the robustness of the planning scheme. Since the built model is a linear two-level programming problem, and each level of the problem has its own objective function and decision variables, the KKT condition is used to convert the original problem into a single-level equilibrium constraint mathemat...

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Abstract

The invention relates to a microgrid group multi-stage optimization planning method considering load uncertainty, and the method comprises the steps: constructing a two-stage robust optimization double-layer mathematical model, wherein the upper layer of the two-stage robust optimization double-layer mathematical model is a cost model of a power distribution network, and the lower layer of the two-stage robust optimization double-layer mathematical model is a cost model of a microgrid group; carrying out power interaction between the upper layer and the lower layer through PCC points to form coupling of the double-layer model; when the two-stage robust optimization double-layer mathematical model is solved, carrying out KKT equilibrium constraint on constraint conditions of the cost model of the microgrid group, and then linearizing the constraint conditions by using a large M method; and finally, solving the two-stage robust optimization double-layer mathematical model by adopting a column constraint generation decoupling algorithm. Compared with the prior art, the optimal planning construction scheme can be provided for the micro-grid group, the income equalization of a plurality of benefit subjects is realized, the utilization rate of renewable energy sources is improved, the technical indexes of the power distribution network are improved, and the coordinated development of the power distribution network and the micro-grid is effectively realized.

Description

technical field [0001] The invention relates to the field of master-slave game planning for a micro-grid group connected to a distribution network, in particular to a multi-stage optimal planning method for a micro-grid group considering load uncertainty. Background technique [0002] With a large number of new devices such as distributed power sources and energy storage systems connected to the power grid, one of the main features of the future power distribution system is the overall planning and coordinated development of micro-grid groups and distribution networks. The access of the micro-grid group can not only effectively absorb the volatility and intermittency of distributed energy generation, but also help reduce the network loss of the distribution network, improve the voltage level of the distribution network, and improve the reliability of power supply. Constructing an open power market environment is an inevitable development trend. In the face of a more flexible...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/46H02J3/32
CPCH02J3/0075H02J3/466H02J3/003H02J3/32H02J2203/20Y02E70/30
Inventor 李振坤邢馨月符杨张智泉米阳苏向敬田书欣
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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