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Economic dispatching method and system for microgrid based on distributed network control

A distributed network and distributed control technology, applied in AC network circuits, load forecasting in AC networks, system integration technology, etc., can solve problems such as damage to system balance, difficulties in economic scheduling of microgrids, and fluctuations in load demand.

Active Publication Date: 2018-04-20
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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Problems solved by technology

However, renewable energy power generation depends on the external environment, its output has obvious randomness, and the load demand has fluctuations. At the same time, the inertia of the microgrid itself is small, and the two-way flow of the power flow. Economic dispatch of microgrids becomes very difficult
[0003] At present, the average consensus algorithm has been widely used in the economic dispatch of microgrids, but there are two problems: 1) In the iterative process, the average consensus algorithm will destroy the system balance; Nodes with centralized functions cannot achieve complete distribution

Method used

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  • Economic dispatching method and system for microgrid based on distributed network control
  • Economic dispatching method and system for microgrid based on distributed network control
  • Economic dispatching method and system for microgrid based on distributed network control

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Embodiment

[0078] Example: such as Figure 1 to Figure 8 Shown; An economic dispatch method for microgrid based on distributed network control, which includes:

[0079] S1: According to the economic dispatch model, the theoretical optimal output formula of the controllable distributed generation DG is derived under the constraints;

[0080] S2: Construct a communication network according to the two-layer control model of the micro-grid; the two-layer control model of the micro-grid includes: a lower-layer micro-grid and an upper-layer communication network;

[0081] S3: Design a weight matrix according to the upper-layer communication network, and obtain a distributed control law according to the weight matrix;

[0082] S4: Calculate the set value according to the distributed control law, adjust the output of the controllable distributed generation DG according to the calculated set value, and realize the economical optimal dispatch of the microgrid.

[0083] More specifically, step 1)...

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Abstract

The invention discloses an economic dispatching method and system for a microgrid based on distributed network control. The method comprises S1: deriving a theoretical optimal output formula of controllable distributed generation DG under a constraint condition according to an economic dispatching model; S2: constructing a communication network according to a microgrid double-layer control model comprising a lower microgrid and an upper communication network; S3: designing a weight matrix according to the upper communication network and obtaining a distributed control law according to the weight matrix; S4: calculating a set value according to the distributed control law, and adjusting the output of the controllable distributed generation DG according to the calculated set value, thereby realizing economic optimal dispatching of the microgrid. The method and the system have the advantages that the total power generation cost of the microgrid can be minimized by realizing equal tiny increase rate of all controllable DGs; convenience is provided for an algorithm design by designing the weight matrix; and the system power balance can be ensured during the iteration process.

Description

technical field [0001] The invention relates to the technical field of micro-grid distributed control, in particular to a micro-grid economic scheduling method and system based on distributed network control. Background technique [0002] In recent years, distributed generation (Distributed Generation, DG) relying on renewable energy has developed rapidly, and microgrid, as an effective management form of distributed Power supply reliability and stability are of great significance. However, renewable energy power generation depends on the external environment, its output has obvious randomness, and the load demand has fluctuations. At the same time, the inertia of the microgrid itself is small, and the two-way flow of the power flow. Economic dispatch of microgrids becomes very difficult. [0003] At present, the average consensus algorithm has been widely used in the economic dispatch of microgrids, but there are two problems: 1) In the iterative process, the average cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/38G06Q10/06G06Q50/06
CPCG06Q10/06312G06Q10/06315G06Q50/06H02J3/382H02J3/00H02J3/003H02J2203/20Y02E40/70Y04S10/50
Inventor 夏海波李强王建国徐瑞林陈涛陈民铀李哲李俊杰
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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