徐新泉，徐立亮，胡仁祥，张　毅，王明慧，赵亚楠

(国网吐鲁番供电公司，新疆 吐鲁番　838000)



并网型储能系统充放电仿真分析

徐新泉，徐立亮，胡仁祥，张毅，王明慧，赵亚楠

(国网吐鲁番供电公司，新疆 吐鲁番838000)

摘要：储能系统被广泛应用于风电、光伏等间歇性新能源发电中平抑出力波动。针对新能源系统充放电对储能系统控制单元稳定运行的要求，搭建了一种基于DC/AC变换器和双向半桥DC/DC变换器的控制系统。首先采用状态空间法建立了储能系统充放电控制的数学模型，然后基于此数学模型，详细分析了该控制器的工作原理及电流闭环反馈的控制方法，最后在Matlab仿真系统中验证了理论分析的正确性。

关键词：储能系统；闭环反馈控制；状态空间法

Abstract：Energy storage systems are widely used in power generation by the intermittent new energy sources such as wind power, photovoltaic etc to smooth the output fluctuations. Aiming at the requirements for stable operation of control unit in energy storage system by the charging and discharging of new energy system, the control system based on DC/AC converter and two-way half bridge DC/DC converter is proposed. The mathematical model to control charging and discharging of energy storage is established with state space method. And then the working principle of the controller and the control method of current closed-loop feedback are analyzed in detail based on the proposed mathematical model. Finally, the correctness of the theoretical analysis is verified in Matlab simulation.

Key words：energy storage system; closed-loop feedback control; state space method

0引言

随着电力电子技术的飞速发展以及风电等间歇性能源大力并网的需求，储能系统以其较强的灵活性等优点逐渐被应用到电力系统中。随着储能技术的不断成熟，大规模的风电、光伏等清洁能源完成了友好并网。目前储能系统主要可以通过以下两种方式接入电网中：1)直接通过双向AC/DC变换器接入电网；2)通过AC/DC和双向DC/DC两级变换器接入电网[1-2]。文献[3-5]采用状态空间平均法建立了超导储能系统用斩波器充放电的数学模型，并搭建了试验系统，但没有考虑充放电时交流侧功率因数的变化，在实际运用中有一定的局限性。下面将结合充放电时交流侧功率因数的变化情况，进行储能系统的充放电控制研究。……