| 引用本文: | 樊启高,陈 亮,毕恺韬,等.基于定频MPC的飞跨电容储能双向直流变换器低频波动功率抑制策略[J].电力系统保护与控制,2023,51(21):1-11.[点击复制] |
| FAN Qigao,CHEN Liang,BI Kaitao,et al.Low-frequency fluctuation power of a flying capacitor energy storage bidirectional DC converter based on a fixed frequency MPC[J].Power System Protection and Control,2023,51(21):1-11[点击复制] |
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| 摘要: |
| 为抑制直流母线低频波动功率对储能系统的影响，以飞跨电容双向直流变换器为研究对象，提出基于单目标定频模型预测控制(model predictive control, MPC)低频波动功率抑制策略。为降低传统MPC算法的运算负荷，通过对变换器数学模型进行分析，提出一种单目标定频MPC控制算法。该算法仅需通过电感电流单目标约束函数，即可实现对系统电流及双端飞跨电容电压的控制，无须对两端飞跨电容电压进行独立寻优，极大地降低了计算量。为实现对储能系统低频波动功率的抑制，引入低频波动功率抑制算法，通过与所提MPC算法的融合，使最终控制方案能够在实现储能控制目标的前提下，具备低频波动功率抑制能力，且保持良好的动态性能。通过搭建小功率实验平台对所提控制策略的有效性进行了验证。 |
| 关键词: 飞跨电容双向直流变换器 储能系统 模型预测 低频波动功率抑制 单目标约束 |
| DOI：10.19783/j.cnki.pspc.230038 |
| 投稿时间：2023-01-10修订日期：2023-03-04 |
| 基金项目:国家自然科学基金项目资助(51807079)；江苏省自然科学基金项目资助(BK20200623)；博士后科学基金项目资助(2020M681692) |
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| Low-frequency fluctuation power of a flying capacitor energy storage bidirectional DC converter based on a fixed frequency MPC |
| FAN Qigao,CHEN Liang,BI Kaitao,AI Jian |
| (School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China) |
| Abstract: |
| To suppress the influence of low-frequency fluctuating power of a DC bus on an energy storage system, a low-frequency fluctuating power suppression strategy based on single-objective fixed-frequency model predictive control (MPC) is proposed. A flying capacitor bidirectional DC converter is the research object. To reduce the computational load of a traditional MPC algorithm, a single-objective fixed-frequency MPC control algorithm is proposed by analyzing the mathematical model of the converter. It can control the system current and the voltage of the two-terminal flying capacitor only through the single-objective constraint function of the inductor current, without independent optimization of the voltage of the two-terminal flying capacitor. In this way it greatly reduces the amount of calculation. In order to suppress the low-frequency fluctuating power of the energy storage system, a low-frequency fluctuating power suppression algorithm is introduced. Through the integration with the proposed MPC algorithm, the final control scheme can have the capability of suppressing the low-frequency fluctuating power and keep good dynamic performance while realizing the energy storage control goal. The proposed control strategy is verified by building a low-power experimental platform |
| Key words: flying-capacitor bi-directional DC converter energy storage system model prediction low frequency fluctuation power suppression single objective constraint |
