Microgrid economy and stability optimization method considering renewable energy source randomness

A renewable energy, economic optimization technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problem that the economic optimization and stability research of microgrid cannot be carried out in isolation.

Active Publication Date: 2017-06-13
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0004] Aiming at the problem that micro-grid economic optimization and stability research cannot be carried out in isolation, the present invention provides a micro-grid economic and stability optimiza

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  • Microgrid economy and stability optimization method considering renewable energy source randomness
  • Microgrid economy and stability optimization method considering renewable energy source randomness
  • Microgrid economy and stability optimization method considering renewable energy source randomness

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Embodiment Construction

[0062] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0063] A microgrid economy and stability optimization method considering the randomness of renewable energy, comprising the following steps:

[0064] Step 1. Forecast the power output of renewable energy.

[0065] First, combined with the analysis of the schematic diagram of the microgrid structure (such as figure 1 shown), in the island operation mode of the microgrid, there are three controllable distributed micro-sources (DDER), wind turbine (WTG), photovoltaic power station (PV), energy storage system (ESS), and the load. Considering the actual situation, the present invention divides the load into interruptible load (IL) and non-interruptible load (NL).

[0066] The output of wind turbines and photovoltaic power stations is predicted, and the Latin hypercube sampling method (LHS) is used to disc...

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Abstract

The present invention provides a microgrid economy and stability optimization method considering renewable energy source randomness. The method comprises the following steps: the step 1: performing output prediction of renewable energy source power; the step 2, establishing a microgrid economy optimization model; the step 3, establishing a microgrid stability evaluation index system; the step 4, determining a microgrid active power control strategy; and the step 5, performing coordination optimization of the microgrid economy and stability. Based on a droop control method, the microgrid economy and stability optimization method considering the renewable energy source randomness improves the isolated study of microgrid economy and stability in the prior art, effectively combines the microgrid economy and stability study, is suitable for changing of different operation modes, and performs optimization solution of droop coefficients through a differential evolution algorithm to realize good dynamic stability of the microgrid while good economy of the microgrid, and the established model method is reasonable and efficient.

Description

technical field [0001] The invention relates to the field of coordinated optimization of micro-grid economy and stability, in particular to a micro-grid economy and stability optimization method considering the randomness of renewable energy. Background technique [0002] With the gradual increase in the penetration rate of distributed power sources, the randomness and uncertainty of renewable energy generation such as wind power and photovoltaic power generation not only bring challenges to the economic dispatch of microgrids, but also increase the stability of microgrids. risks of. Whether the microgrid can operate stably requires not only solving the problem of how to maintain the stability of the island operation, but also ensuring stable operation in various dynamic processes such as grid-connected to isolated grid, and drastic changes in the operation mode of the microgrid. Therefore, under the premise of uncertain renewable energy output, how to consider the drastic ...

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Application Information

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IPC IPC(8): H02J3/46H02J3/00G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06H02J3/00H02J3/46H02J2203/20
Inventor 闫秉科
Owner STATE GRID CORP OF CHINA
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