Storage battery charging and discharging control method based on wind power ultra-short-term prediction
A charging and discharging control and ultra-short-term prediction technology, applied in the field of power grid, can solve the problems that the charging and discharging power of the energy storage system cannot be adapted to the wind power energy storage system in real time, and lack of overall consideration.
Active Publication Date: 2020-05-15
EAST INNER MONGOLIA ELECTRIC POWER COMPANY +2
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However, the existing battery charge and discharge control methods lack overall consideration in the application of smoothing short-term fluctuations in wind power output, and the established battery charge and discharge control strategies are generally relatively simple, and the control of the charge and discharge power of the energy storage system cannot be adapted in real time. Wind power short-term forecast error value and state of charge change of energy storage system
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[0103] The present invention will be further described below in conjunction with the drawings and specific embodiments.
[0104] Such as figure 1 As shown, the battery charge and discharge control method based on ultra-short-term prediction of wind power power of the present invention includes the following steps:
[0105] Step 1: Collect data: Collect the actual wind power P of the grid at time t w (t), wind power short-term forecast power P r (t), the lower limit of wind power short-term forecast power P r-min (t), the upper limit of wind power short-term forecast power P r-max (t), the allowable upper limit of wind power fluctuation D et , Wind power ultra-short-term forecast power P uf (t), and the remaining capacity of the battery E(t), self-discharge rate δ sdr 、Charging efficiency η c 、Discharge efficiency η d , Rated capacity E N .
[0106] The battery charging and discharging power control strategy is based on the short-term forecast of wind power power and ultra-short-te...
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The invention relates to the technical field of power grids, and provides a storage battery charging and discharging control method based on wind power ultra-short-term prediction. The method comprises the steps of: collecting data; introducing the control coefficient of the SOC value interval of the storage battery; correcting the charging and discharging power of the storage battery by considering the short-term prediction error of the wind power; introducing the control coefficient of the charging and discharging power of the storage battery, further correcting the charging and dischargingpower of the storage battery by considering the real-time SOC value of the storage battery, and introducing a charging and discharging power optimization coefficient to further correct the charging and discharging power of the storage battery to obtain a storage battery charging and discharging control strategy; and finally, constructing a storage battery charging and discharging control model, and solving an optimal control coefficient based on a particle swarm optimization algorithm to perform charging and discharging control on the storage battery. The control of the charging and discharging power of the storage battery can adapt to the wind power short-term prediction error and the change of the state of charge of the energy storage system in real time, the influence of the state of charge constraint of the storage battery on the charging and discharging behaviors is reduced, and the utilization efficiency of the storage battery is effectively improved.
Description
Technical field [0001] The invention relates to the technical field of power grids, in particular to a method for controlling battery charging and discharging based on ultra-short-term prediction of wind power. Background technique [0002] In my country, more and more large-scale wind farms have been connected to the grid for operation. Compared with conventional power sources, wind energy is a random and intermittent energy source, and the current wind power output forecast accuracy is not high. These characteristics result in wind farms unable to provide continuous and stable controllable power, poor dispatchability of power generation, and large-scale wind power integration. The network will have a major impact on the system's peak and frequency modulation, safety and stability, and power quality. [0003] At present, the coordinated operation of storage batteries and wind farms has become one of the important ways to smooth wind farm output power fluctuations. Due to the con...
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IPC IPC(8): H02J3/32H02J3/38H02J7/00
CPCH02J3/32H02J7/0068Y02E70/30Y02E10/76
Inventor 吴晓丹万玉良陈璐
Owner EAST INNER MONGOLIA ELECTRIC POWER COMPANY