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A comprehensive energy management method and system for an energy storage system of a new energy power station

An energy storage system and energy management technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of low tracking plan output and multi-objective comprehensive operation strategies, lack of effective methods, high cost, etc., to achieve convenient The effect of actual operation

Active Publication Date: 2022-07-22
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the high cost of the battery energy storage system, the configured capacity is often very limited. In a complete dispatch cycle, if the output fluctuation of new energy sources is directly stabilized or the planned output is tracked, the SOC of the energy storage system may reach the upper or lower limit and stop output. In some cases, it cannot play a role in a complete scheduling cycle. During the time period without energy storage, the output of new energy is uncontrollable, and its volatility and the possibility of deviation from the scheduling plan will greatly increase.
At present, for the function of stabilizing fluctuations, there are many strategies that consider energy storage SOC, but there are few tracking plan output and multi-objective comprehensive operation strategies that consider SOC, and there is a lack of effective methods

Method used

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  • A comprehensive energy management method and system for an energy storage system of a new energy power station
  • A comprehensive energy management method and system for an energy storage system of a new energy power station
  • A comprehensive energy management method and system for an energy storage system of a new energy power station

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Embodiment 1

[0101] A 10MW wind farm is equipped with a 3MW×1.5h battery energy storage system to achieve functions such as smoothing fluctuations, tracking planned output, and reducing wind curtailment, i.e. cutting peaks and filling valleys. The power sampling interval is 1min, and the wind storage power is limited The value is 8MW, the maximum allowable power fluctuation of the 1min level is 0.5MW, and the maximum allowable power fluctuation of the 10min level is 1.5MW. The upper limit of the SOC of the energy storage battery is 80%, and the lower limit of the SOC is 20%. Using the multi-objective application comprehensive energy management strategy of the present invention, the complete operation of the wind storage power station in one day is as follows: figure 2 shown.

[0102] Depend on figure 2 It can be seen that the use of the energy storage system controlled by the present invention can better achieve smooth fluctuations, track planned output and cut peaks and fill valleys. ...

Embodiment 2

[0141] The present invention also provides a comprehensive energy management system for the energy storage system of a new energy power station, and the system includes:

[0142] The first calculation module: used for the current power of the new energy power station and the change status of the SOC of the energy storage system, respectively calculating the first power demand corresponding to the tracking planned output and the second power demand corresponding to the fluctuation suppression function;

[0143] The second calculation module: used to calculate the third power demand for peak shaving and valley filling based on new energy power;

[0144] Third calculation module: used to calculate the power demand of the energy storage system based on the first power demand, the second power demand and the third power demand.

[0145] The first computing module includes a first computing unit and a second computing unit;

[0146] The first calculation unit includes: calculating ...

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Abstract

The present invention provides a comprehensive energy management method and system for an energy storage system of a new energy power station, including: based on the current power of the new energy power station and the change state of the SOC of the energy storage system, respectively calculating and tracking the first power demand corresponding to the planned output and suppressing fluctuations The second power demand corresponding to the function; the third power demand corresponding to the peak shaving and valley filling function is calculated based on the current power of the new energy power station; the energy storage system power demand is determined based on the first power demand, the second power demand and the third power demand . The invention realizes the functions of tracking planned output, shaving peaks and filling valleys, and suppressing fluctuations at the same time, ensuring that the SOC of the energy storage system does not exceed the limit within a complete dispatch cycle, and ensuring that the new energy output is always in a controllable state.

Description

Technical field: [0001] The invention belongs to the technical field of energy storage operation control, and in particular relates to a comprehensive energy management method and system for an energy storage system of a new energy power station. Background technique: [0002] With the rapid development of renewable energy, the proportion of grid-connected energy has gradually increased, and its volatility, intermittency and unpredictability have brought great challenges to the stable operation of the existing power system. Energy storage technology can stabilize the output fluctuation of new energy, assist new energy to track the power generation plan issued by the dispatcher, reduce the curtailment of wind and solar energy, effectively improve the grid's ability to accept new energy, and provide support for the grid connection of large-scale renewable energy. Among various power system energy storage technologies, battery energy storage has the characteristics of modulariz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/32H02J3/38
CPCH02J3/382H02J3/32
Inventor 徐少华薛宇石李建林
Owner CHINA ELECTRIC POWER RES INST
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