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Distributed non-linear synergic controller-based energy storage group power control method

A control method and controller technology, applied in AC network circuits, circuit devices, AC network load balancing, etc., can solve problems such as poor immunity, high cost, and complex centralized communication network, so as to improve the ability to resist external disturbances Effect

Active Publication Date: 2018-10-26
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since energy storage systems are geographically dispersed, building a centralized communication network is complex, costly, and less robust to disturbances

Method used

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  • Distributed non-linear synergic controller-based energy storage group power control method
  • Distributed non-linear synergic controller-based energy storage group power control method
  • Distributed non-linear synergic controller-based energy storage group power control method

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Experimental program
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Effect test

specific Embodiment

[0035] The specific embodiment implemented according to the complete method of the present invention is as follows:

[0036] A simulation experiment is carried out on the power control method of the energy storage group proposed by the present invention in MATLAB. The experimental parameters are shown in Table 1 below.

[0037] Table 1

[0038]

[0039] Detect power and current waveform by Scope module, calculate the time of dynamic process by Timer module, adopt the control method that the present invention proposes, gained experimental data: P ref – P<0.15kW, the convergence time of the actual value of the current output by all energy storage systems is <0.3s, and the error between the actual value of the current output by each energy storage system and the reference value is <0.65%.

[0040] The screenshot of the experiment is as follows:

[0041] (1) When the reference value of the output active power of the micro-energy storage group changes, the reference value (so...

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Abstract

The invention discloses a distributed non-linear synergic controller-based energy storage group power control method. The distributed non-linear synergic controller-based energy storage group power control method comprises the steps of processing a reference value and an actual value of an active power output from an energy storage group by a non-linear error controller to obtain reference valuesof output currents of all energy storage systems; building a communication network for connecting all energy storage systems in the energy storage group; and controlling each energy storage system bythe distributed non-linear synergic controller. By the distributed non-linear synergic controller-based energy storage group power control method, the active power allocation accuracy of the energy storage group is improved, the dynamic response speed of power control of the energy storage system is improved, the influence of interference on the power control of the energy storage group is reduced, and the capability of the energy storage group on a communication fault is improved.

Description

technical field [0001] The invention relates to a grid power control method, in particular to an energy storage group power control method based on a distributed nonlinear cooperative controller. Background technique [0002] The energy storage system can effectively alleviate the uncertain disturbance of the power system caused by the massive access of intermittent and fluctuating new energy, and improve the ability of the power system to absorb new energy. In addition, efficient management of energy storage groups composed of a large number of energy storage systems can provide comprehensive technical support for power system voltage, frequency fluctuations, and power market power transactions. However, for geographically dispersed energy storage systems, how to achieve accurate and rapid control of the output power of the energy storage group to meet the power scheduling requirements of the superior dispatching system has become a hot issue in the research field of energy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/28
CPCH02J3/28H02J2203/20
Inventor 李超勇
Owner ZHEJIANG UNIV
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