Multistage power grid linkage unit combination scheduling method in regional power system

A regional power system and unit combination technology, applied in the direction of system integration technology, information technology support system, data processing application, etc., can solve the problems of irrational decision-making results and inability to realize renewable energy, etc.

Active Publication Date: 2019-10-11
STATE GRID ENERGY RES INST +1
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Problems solved by technology

In this case, if we continue to use the unit combination problem with traditional security constraints (in the traditional power system, there is no active power source in the power distribution and microgrid, there is no need to consider when solving the unit combination problem of the regional power system distribution network and the following network), it will inevitably lead to the irrationality of its decision-making results, and it will not be able to achieve the most effective goal of accepting renewable energy power generation

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  • Multistage power grid linkage unit combination scheduling method in regional power system
  • Multistage power grid linkage unit combination scheduling method in regional power system
  • Multistage power grid linkage unit combination scheduling method in regional power system

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Embodiment Construction

[0034] The present invention conducts an in-depth study on the issue of whether linkage decision-making can be made between the active quantity of each layer of transmission-distribution-micro and the unit combination, that is, the start-stop variable of the transmission network unit and the active quantity in ADG and MG are used as decision-making variables at the same time. Focusing on a certain regional power system, taking the three-layer organic linkage of micro-grid, active distribution network and transmission network as an example, with the goal of minimizing the overall operating cost of the regional system, when meeting the needs of the transmission network, distribution network, and micro-grid Under the premise of the respective constraints of the power grid, a safety-constrained unit combination model is established that considers the unit start-stop, distribution network and micro-grid active capabilities as linkage decision-making variables, and realizes unified an...

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Abstract

The invention discloses a multistage power grid linkage unit combination scheduling method in a regional power system. The method comprises the following steps: determining multistage power grid active loads and operation parameters of each stage of power grid unit in the regional power system; establishing a safety constraint unit combination economic dispatching model considering unit start andstop and taking active loads of all levels of power grids as linkage decision quantities; and solving the model based on a target cascade analysis method, and determining an optimal scheduling resultof the system. The micro-grid constraints comprise micro-grid power balance constraints and micro-grid tie line transmission power constraints. The method surrounds an electric power system in a certain area; the goal of minimizing the total operation cost of the regional system is achieved. On the premise of meeting respective constraints of all levels of power grid layers, a safety constraint unit combination model considering unit start and stop is established. The active capacity of each level of power grid layer is taken as a linkage decision amount to make unified analyses and decisionsof a full power system. The model is solved by adopting a distributed parallel computing target cascade analysis method (ATC) to realize source-network-load cooperative scheduling of a complex system.

Description

technical field [0001] The invention relates to the technical field of power system analysis, in particular to a unit combination scheduling method for regional power system multi-level power grid linkage. Background technique [0002] Today, in the face of wide-area interconnected power systems, the power grid presents a multi-layer and multi-level complex topology. Different from traditional power systems, active distribution grids (ADG) and microgrids (MG) not only have distributed Renewable energy power generation also has active power sources or loads such as conventional power sources, energy storage, and demand-side response. As a result, two-way flows appear between transmission-distribution-micro-grids at all levels, breaking the traditional transmission network from top to bottom. The existence of active distribution grid (ADG) and microgrid (MG) makes the power flow upstream in the power grid. In this case, if we continue to use the unit combination problem with ...

Claims

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Application Information

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IPC IPC(8): G06Q50/06G06F17/10
CPCG06Q50/06G06F17/10Y04S10/50Y02E40/70
Inventor 徐波张玉敏韩学山金艳鸣史善哲杨海生
Owner STATE GRID ENERGY RES INST
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