A peak-shaving and valley-filling method for wind-solar-storage microgrid system based on stochastic production simulation
A technology of peak shaving and valley filling, wind-solar storage, applied in the field of microgrid system operation planning and wind-solar-storage combined power generation, which can solve problems such as lack of consideration
Active Publication Date: 2017-12-26
STATE GRID CORP OF CHINA +4
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Problems solved by technology
[0010] In the existing technology, the energy storage system is considered to be added to the microgrid system for corresponding economic optimization, but it is not considered to achieve peak shaving and valley filling while improving the reliability of its power supply
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[0094] The present invention will be further described below in conjunction with accompanying drawing.
[0095] like figure 1 shown, figure 1 It is a flow chart of the method of the present invention; the method of the present invention is a method for peak-shaving and valley-filling of a wind-storage-storage micro-grid system based on stochastic production simulation, and the method comprises the following steps:
[0096] Step 1. Read the predicted raw load data, wind power output value and photovoltaic output value in the next day;
[0097] Step 2. Determine the equivalent load data and obtain the original equivalent load curve;
[0098] Step 3. Determine the expected value of insufficient power ENNS and the probability of insufficient power LOLP;
[0099] Step 4. Determine the charging and discharging power and charging and discharging power of the energy storage system according to the expected value of insufficient electricity ENNS and the probability of insufficient e...
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The invention provides a wind-sunlight storage contained micro grid system peak clipping and valley filling method based on random production simulating. The wind-sunlight storage contained micro grid system peak clipping and valley filling method includes the following steps: (1) reading original load data, a wind electricity contribution value and a photovoltaic contribution value which are predicated in future 24 hours; (2) determining equivalent load data, and obtaining an original equivalent load curve; (3) determining an ENNS and an LOLP; (4) according to the ENNS or the LOLP needing to be reduced, determining the charging-discharging power and the discharging quantity of an energy storage system, and generating a charging-discharging strategy; (5) verifying the reached peak clipping and valley filling effect. According to the wind-sunlight storage contained micro grid system peak clipping and valley filling method, the simple and clear equivalent continuous load curve in random production simulation is adopted for determining the charging-discharging power and the capacity of the energy storage system, the charging-discharging strategy is generated in combination with the curve, the whole process is simple and practicable, and the power supply reliability improvement and load peak clipping and valley filling of a micro grid system are effectively combined.
Description
technical field [0001] The invention relates to a method in the technical field of micro-grid system operation planning and wind-solar-storage combined power generation, in particular to a method for peak-shaving and valley-filling of a micro-grid system including a wind-solar-storage combined power generation system based on stochastic production simulation. Background technique [0002] With the continuous development of micro-grid technology, more and more distributed power sources are applied to micro-grids. The increase in installed capacity of wind power and photovoltaic power generation in distributed power sources leads to changes in micro-grid load fluctuations and failures of traditional units in micro-grids. The possibility of outage will cause uncertainty to the load supply, and the reliability of power supply will be affected to a certain extent. [0003] Due to the small load of the microgrid, the equipped installed capacity is also small. In order to ensure th...
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IPC IPC(8): H02J3/28
CPCH02J3/28H02J2203/20Y02E10/56
Inventor 李相俊宁阳天惠东陈彬范元亮麻秀范刘汉民
Owner STATE GRID CORP OF CHINA