Economic dispatch control method for multi-bus DC microgrid considering bus voltage constraints

A DC micro-grid and economical dispatching technology, applied in the direction of DC circuits with more than three lines, parallel operation of DC power supplies, DC network circuit devices, etc., can solve problems such as the coordination of bus voltage constraints and economic dispatching, and reduce the overall total power generation cost, reduce total power generation cost, and improve the effect of DC bus voltage quality

Active Publication Date: 2021-06-15
CENT SOUTH UNIV
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Problems solved by technology

[0004] However, the current economic dispatch method using distributed communication control has the following problems: in the case of unknown line impedance, it cannot solve the coordination problem of bus voltage constraints and economic dispatch in the distributed economic dispatch of multi-bus DC microgrid

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  • Economic dispatch control method for multi-bus DC microgrid considering bus voltage constraints
  • Economic dispatch control method for multi-bus DC microgrid considering bus voltage constraints
  • Economic dispatch control method for multi-bus DC microgrid considering bus voltage constraints

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Embodiment Construction

[0056] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0057] The present invention proposes a multi-bus DC micro-grid economic scheduling control method considering bus voltage constraints, the method comprising the following steps:

[0058] Step S1: Establish a microgrid dynamic economic dispatch model with m DC buses, and divide the power generation units DG in the DC microgrid into two types, fuel generator PDG and new energy generator RDG, and the one closest to the i-th bus PDG is PDGi_1, and the rest are marked as PDGi_j in turn, 2≤j≤ni, and ni is the total number of PDGs on the i-th bus;

[0059] Specifically, in the step S1, in order to make the RDG generate electricity as much as possible to reduce the total power g...

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Abstract

The invention provides a multi-bus DC micro-grid distributed economic dispatch control method considering bus voltage constraints. The method reduces the total power generation cost as much as possible while ensuring the bus voltage quality. By improving the dynamic consistency algorithm, the multi-bus voltage constraints in the economic dispatch algorithm based on dynamic consistency are solved. This system is a distributed control system, and the control devices corresponding to each micro-source can realize the reduction of the global power generation cost and the recovery of the bus voltage only through local information and neighbor information.

Description

technical field [0001] The invention relates to the technical field of economic dispatching of microgrids, in particular to a distributed economic dispatching control method considering busbar voltage constraints of multi-bus DC microgrids. Background technique [0002] With the continuous improvement of people's awareness of sustainable energy development and environmental protection, micro-grid technology has been vigorously developed. Compared with the AC microgrid, the DC microgrid does not have frequency deviation, reactive power compensation and multi-level power conversion. Its strong line power transmission capability, high power supply reliability and low network loss make the DC microgrid a future development trend. [0003] In DC microgrids, economic dispatch is a core issue. At present, the control strategies for economic dispatch all rely on high-bandwidth centralized communication. As the number of micro-sources increases, on the one hand, the cost of communi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J1/00H02J1/10H02J1/08
CPCH02J1/00H02J1/08H02J1/10H02J1/001H02J2203/10H02J2203/20H02J2300/10H02J2300/20H02J2300/40
Inventor 韩华陈欣宇柳张杰孙尧粟梅
Owner CENT SOUTH UNIV
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