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Active power distribution network dynamic virtual cluster division method based on model prediction control

A technology of model predictive control and active distribution network, applied in the direction of electrical components, circuit devices, photovoltaic power generation, etc., can solve the problem of continuous changes in the state of the power grid, the difficulty of cluster division results to meet the operation control of the active distribution network, and fluctuations in the output of distributed energy and other problems, to achieve the effect of moderate number of nodes, simplified dynamic cluster division process, and stable cluster division results

Active Publication Date: 2020-05-01
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, the distributed energy output in the active distribution network is constantly fluctuating, and the state of the power grid is constantly changing. The result of the steady-state cluster division is difficult to meet the ever-changing operation control of the active distribution network.

Method used

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  • Active power distribution network dynamic virtual cluster division method based on model prediction control
  • Active power distribution network dynamic virtual cluster division method based on model prediction control
  • Active power distribution network dynamic virtual cluster division method based on model prediction control

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Embodiment

[0088] In order to verify the validity of the scheme of the present invention, in figure 2 Simulation experiments are carried out in the modified IEEE33 node power distribution system shown. In the experiment, the daily cluster division rolling optimization link is set with a step size of 30 minutes, that is, ΔT=30, the start-up period is 30 minutes, and the solution time is 2 hours in the future, that is, M=4; the real-time feedback correction link is set as a start-up period of 10 minutes.

[0089] 1) System parameter setting

[0090] Nodes 8 and 30 are installed with controllable distributed energy sources, and the output of active and reactive power is controllable. Nodes 14 and 25 are installed with photovoltaics, and nodes 24 and 32 are installed with wind turbines. The active power of photovoltaics and wind turbines is uncontrollable, but the reactive power is controllable.

[0091] The distributed energy installation nodes and installation capacity are shown in Tabl...

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Abstract

The invention discloses an active power distribution network dynamic virtual cluster division method based on model prediction control. The method comprises steps of performing cluster power supply rate constraint verification and rolling optimization by taking a rolling optimization time period as a time period division basis and combining the cluster power supply rate constraint and a rolling optimization objective function, and determining a cluster division scheme in the first rolling optimization time period in the future; utilizing a feedback correction time period as a time period division basis, in combination with a feedback correction objective function, performing feedback correction of a cluster division scheme obtained by rolling optimization once in each feedback correction time period in the first rolling optimization time period in the future, and determining a cluster division scheme of each feedback correction time period in the first rolling optimization time periodin the future. The method is advantaged in that dynamic closed-loop cluster division optimization is formed according to real-time information feedback, the actual working condition change of the system can be effectively tracked, and the adverse effect of prediction deviation and distributed energy fluctuation on active power distribution network partition control is eliminated.

Description

technical field [0001] The invention relates to a virtual cluster division technology of an active distribution network, in particular to a dynamic virtual cluster division method of an active distribution network based on model predictive control. Background technique [0002] The extensive use of renewable distributed energy (Distributed Generation, DG) is an important means to solve the energy crisis. The active distribution network technology has received extensive attention because it can accommodate a large number of DGs and improve the quality and reliability of power supply for users. However, the output of distributed energy is intermittent and uncertain, which brings great difficulties to the operation control of active distribution network. [0003] At present, the common distributed renewable power regulation methods mainly include micro-grid mode, centralized control and cluster control mode. Among them, the cluster-based control method can make full use of th...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/46
CPCH02J3/00H02J3/46Y04S10/50
Inventor 沈紫峰柳伟杨镇宁朱肖镕李娜游建斌
Owner NANJING UNIV OF SCI & TECH
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