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Charge-discharge control method and system of energy storage system

A technology of charge and discharge control and energy storage system, which is applied in the fields of photovoltaic power generation, electrical components, energy storage, etc., and can solve the problems of large errors and errors in photovoltaic power prediction.

Pending Publication Date: 2018-05-18
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

The power generation plan curve issued by the dispatch is formulated with reference to the photovoltaic power generation forecast data reported by the photovoltaic power station. However, the photovoltaic power forecast error is still relatively large. There will be a large error between them, if the error exceeds 10% of the bandwidth, the photovoltaic power station will be assessed

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  • Charge-discharge control method and system of energy storage system
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Embodiment Construction

[0083] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0084] The present invention proposes a charging and discharging control method for an energy storage system, such as figure 1 shown, including:

[0085] Step 1. Collect dispatch data and theoretical output values ​​of photovoltaic power plants, determine the curtailment period and tracking plan period of photovoltaic power plants, as well as the curtailment control strategy and tracking plan control strategy;

[0086] Step 2: During the light curtailment period, execute the light curtailment control strategy, and during the tracking plan period, execute the tracking plan control strategy to realize the charging and discharging of the energy storage system.

[0087] In step 1, the scheduling data and theoretical output value of the photovoltaic power station are collected, and the photovoltaic power station’s curtailment period...

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Abstract

The invention relates to a charge-discharge control method and system of an energy storage system. The method comprises following steps: collecting the scheduling data and theoretical output value ofa photovoltaic power station, determining a light discarding period, a tracing plan period, a light discarding control strategy, and a tracing plan control strategy; during the light discarding period, executing the light discarding control strategy; and during the tracing plan period, executing the tracing plan control strategy. The discharge and charge of an energy storage system is realized. The method can improve the on-grid energy of a photovoltaic power station and reduce the measurement cost generated by insufficient tracing precision and thus greatly increases the profits of the photovoltaic power station.

Description

technical field [0001] The invention belongs to the field of new energy power generation and energy storage, and in particular relates to a charging and discharging control method and system for an energy storage system. Background technique [0002] In recent years, photovoltaic power generation has entered a stage of rapid development, but its volatility and intermittent characteristics have brought great challenges to the safe and stable operation of the power grid. At present, photovoltaic power generation in various places has experienced different degrees of light abandonment, which directly affects photovoltaic power plants. In addition, the power grid has also put forward requirements for the tracking and dispatching planning capabilities of photovoltaic power plants, and the power plants that do not meet the requirements will be assessed. For example, the "Implementation Rules for Grid-connected Operation Management of Power Plants in the Northwest Region" refers to...

Claims

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Application Information

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IPC IPC(8): H02J3/32H02J3/38
CPCH02J3/383H02J3/32H02J2203/20Y02E70/30Y02E10/56
Inventor 马会萌李建林惠东李相俊徐少华杨水丽贾学翠袁晓冬杨雄
Owner CHINA ELECTRIC POWER RES INST
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