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杨旭红, 朱鹏, 钱峰伟, 等. 不平衡电网电压下PEMFC并网的改进滑模控制策略[J]. 太阳能学报, 2026,47(5):551-559.
杨旭红, 朱鹏, 钱峰伟, et al. 不平衡电网电压下PEMFC并网的改进滑模控制策略[J]. 2026, 47(5): 551-559.
杨旭红, 朱鹏, 钱峰伟, 等. 不平衡电网电压下PEMFC并网的改进滑模控制策略[J]. 太阳能学报, 2026,47(5):551-559. DOI: 10.19912/j.0254-0096.tynxb.2024-2307.
杨旭红, 朱鹏, 钱峰伟, et al. 不平衡电网电压下PEMFC并网的改进滑模控制策略[J]. 2026, 47(5): 551-559. DOI: 10.19912/j.0254-0096.tynxb.2024-2307.
针对三相电网电压不平衡导致的直流-交流功率耦合问题
使质子交换膜燃料电池(PEMFC)输出电流出现低频脉动
并引起交流侧并网电流畸变的现象
该文提出一种改进超螺旋滑模控制的综合控制策略
旨在消除燃料电池输出电流的脉动并降低并网电流的总谐波畸变率。在该控制策略中
DC-DC变换器采用基于非线性状态观测器的超螺旋滑模控制
增强对非线性扰动和燃料电池温度波动的适应能力;在DC-AC逆变器控制中
应用了改进的超螺旋滑模趋近率滑模控制以适应电网电压的不平衡情况
增强系统鲁棒性。仿真结果显示
该控制策略显著提升系统的动态响应和稳态性能
相较传统滑模控制
能有效减少电流脉动
降低有功功率波动
验证其在不平衡电网条件下的控制有效性。
Unbalanced three-phase grid voltage causes a coupling effect between DC and AC power
leading to low-frequency pulsation in the output current of the proton exchange membrane fuel cell (PEMFC)
which distorts the grid-connected current. This issue not only affects the power quality but also negatively impacts the overall efficiency and stability of the energy conversion system. To address this issue
this paper proposes a comprehensive control strategy based on improved super-twisting sliding mode control(STSMC)
aiming to eliminate the fuel cell output current pulsation and reduce the total harmonic distortion (THD) of the grid-connected current. The proposed control strategy includes a DC-DC converter employing STSMC combined with a nonlinear state observer to ensure rapid response to disturbances in the fuel cell. Additionally
for the DC-AC inverter
an improved super-twisting sliding mode control strategy is applied
incorporating an enhanced reaching law to adapt to unbalanced grid-voltage conditions
thereby improving system robustness. By doing so
the sliding mode controller reduces coupling between active and reactive power
thereby maintaining stability despite grid voltage variations.
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