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Method for scheduling energy storage system in micro-grid

A technology of energy storage system and scheduling method, which is applied in the field of microgrid, can solve the problems of no optimization of microgrid, no consideration of correlation, and inability to give full play to the benefits of energy storage system, so as to reduce operating costs, increase penetration rate, and rationally dispatch Effect

Inactive Publication Date: 2012-06-20
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology

Although this scheduling method is simple, it is not optimized for the entire microgrid, nor does it consider the correlation between time periods, so it cannot fully utilize the benefits of the energy storage system

Method used

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  • Method for scheduling energy storage system in micro-grid
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  • Method for scheduling energy storage system in micro-grid

Examples

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specific Embodiment 1

[0040] Specific embodiment 1: Take a grid-connected microgrid including wind turbines, photovoltaic cells, fuel cells, and diesel engines as an example. The energy storage system is composed of lead-acid batteries, the upper limit of charging and discharging power is 30kW, and the range of stored energy is 60kWh~300kWh.

[0041] 1. Set the interval size as 3kWh, divide the energy storage range of the energy storage system, and calculate the median value of each interval to obtain 80 states of the energy storage system;

[0042] 2. The length of the time period is 1 hour, and 24 time periods throughout the day are used as a cycle, and the objective function is constructed based on the operating cost of the microgrid throughout the day;

[0043] 3. Given parameters such as the upper and lower limits of power and ramp rate of each distributed power supply, set the constraints on the operation of the microgrid;

[0044] 4. The optimal scheduling scheme of the energy storage s...

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Abstract

The invention discloses a method for scheduling an energy storage system in a micro-grid. The method comprises the following steps of: discretizing the state of the energy storage system in the micro-grid; forming a target function by using the operating cost of the micro-grid in a cycle; setting output and climbing constraint conditions of a distributed power supply, power and energy constraint conditions of the energy storage system, a power balancing constraint condition of the micro-grid and the like; and designing a dynamic programming algorithm, and on the premise that the constraint conditions are met, acquiring an optimal scheduling scheme of the energy storage system. For the characteristics of the micro-grid, the energy storage system is optimally scheduled, the operating cost of the micro-grid can be reduced, the permeability of renewable energy sources is improved, and benefits of the energy storage system are maximized.

Description

technical field [0001] The invention relates to the technical field of micro-grids, in particular to a scheduling method for an energy storage system in a micro-grid. The invention belongs to the innovative technology of the scheduling method of the energy storage system in the microgrid. Background technique [0002] The microgrid realizes the integrated operation of distributed power sources and loads, can be flexibly connected to the distribution network, improves the reliability of power supply, and meets the diverse needs of users. It has become an important part of the smart grid construction. However, the high penetration rate of renewable energy such as wind and light makes the microgrid less able to withstand disturbances, especially in the island operation mode, which will face higher risks. In order to stabilize the power fluctuation of renewable energy and maintain the stability of the system, a distributed energy storage system is generally included in the micr...

Claims

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Application Information

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IPC IPC(8): H02J3/28
CPCY02E70/30Y02P80/14
Inventor 雷金勇董旭柱陆志刚陈波刘怡丁明刘小平毕锐吴红斌
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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