Distributed dynamic economic dispatching method for AC/DC hybrid microgrid

An AC-DC hybrid and economic dispatching technology, applied in the field of distributed dynamic economic dispatch of AC-DC hybrid microgrids

Active Publication Date: 2020-04-21
HOHAI UNIV
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Problems solved by technology

The above-mentioned research objects are mostly AC microgrids or DC microgrids, but there is little research on the distributed economic dispatch of AC / DC hybrid microgrids, and the current consensus algorithm is mainly used for single-period economic dispatch and multi-period dynamic economic dispatch It is necessary to consider the coupling constraints between certain units at each time period, such as generator ramping, BESS state of charge (SOC), etc.

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  • Distributed dynamic economic dispatching method for AC/DC hybrid microgrid
  • Distributed dynamic economic dispatching method for AC/DC hybrid microgrid
  • Distributed dynamic economic dispatching method for AC/DC hybrid microgrid

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Embodiment Construction

[0051] The present invention will be further described below in conjunction with the examples, and the following examples are only used to illustrate the technical solutions of the present invention more clearly, but not to limit the protection scope of the present invention.

[0052] Such as figure 1 As shown, a distributed dynamic economic dispatching method of an AC / DC hybrid microgrid provided by the present invention includes the following steps:

[0053] Step 1: Establish a dynamic economic dispatch model of AC / DC hybrid microgrid. Specifically include:

[0054] Step 1.1: Determine the objective function. Based on the fixed cost of the distributed power supply equipment and the energy storage system is sufficient to consume the redundant power of the microgrid, the daily power generation cost of the microgrid is the minimum, and the operating cost includes the operating cost of the traditional unit of the controllable unit and the energy storage unit, and the wind turb...

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Abstract

The invention discloses a distributed dynamic economic dispatching method for an AC/DC hybrid microgrid. The method comprises the following steps: step a, establishing a dynamic economic dispatching model of the AC/DC hybrid microgrid; b, selecting an operation cost micro-increase rate as a consistency state variable according to the model obtained in the step a, solving the economic dispatching problem of the AC/DC hybrid microgrid in a distributed manner according to an equal micro-increase rate criterion, and performing algorithm convergence in finite steps; c, carrying out classification processing on the units which do not meet the operation constraints in the steady-state power, calculated in the step b, of each unit; and d, realizing respective optimal dispatching of the AC sub-microgrid and the DC sub-microgrid based on a secondary adjustment strategy of the load virtual value. According to the distributed dynamic economic dispatching method for the AC/DC hybrid microgrid, themulti-period dynamic economic dispatching problem of the AC/DC hybrid microgrid can be solved.

Description

technical field [0001] The invention relates to a distributed dynamic economic scheduling method for an AC / DC hybrid microgrid, which belongs to the technical fields of new energy power generation and smart grid. Background technique [0002] The economic dispatch and coordinated control of the microgrid are the basis to ensure its economical and reliable operation. At this stage, a centralized control method is usually adopted. Through the microgrid control center, the power generation unit, energy storage unit and load unit in the entire microgrid are coordinated and controlled. The structure is simple and the control accuracy is high, but the flexibility and reliability are poor. If the MGCC fails, suffers from network attacks or communication structure When changes occur, centralized control methods cannot achieve control objectives. Distributed control can overcome the shortcomings of global communication and unified control, and only rely on the information of itself...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J4/00H02J3/38H02J3/46H02J1/10H02J3/00
CPCH02J4/00H02J3/381H02J3/46H02J1/10H02J3/008
Inventor 吴峰蒋科宗炫君
Owner HOHAI UNIV
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