| 引用本文: | 程子霞,丁青波,柴旭峥.光伏发电最大功率追踪的改进电导增量法[J].电力系统保护与控制,2025,53(10):142-152. |
| CHENG Zixia,DING Qingbo,CHAI Xuzheng.Improved incremental conductance method for maximum power tracking in photovoltaic power generation[J].Power System Protection and Control,2025,53(10):142-152 |
|
| 摘要: |
| 传统的电导增量法存在内部参数无法适应外部光照变化和外部光照变化时算法误判两个缺陷。为此，提出一种基于光照预分组和电压变化趋势判别的改进电导增量法。首先，该方法通过将光照水平预分组，预先计算出各分组下算法的最佳参数，根据外部光照所处分组分配算法参数以适应外部光照水平的变化。其次，分析了算法发生误判问题的原因，根据光照变化趋势与功率变化趋势间的关系来预测误判问题的出现。在预测到算法出现误判的情况下对电压趋势进行取反处理，从而避免误判问题的发生。最后，搭建光伏系统仿真模型对改进方法进行验证。仿真结果显示所提改进电导增量法具有较好的响应速度和稳定性。 |
| 关键词: 电导增量法 最大效率跟踪 误判问题 光伏控制系统 光照预分组 |
| DOI：10.19783/j.cnki.pspc.241025 |
| 分类号: |
| 基金项目:国家自然科学基金项目资助(52107130) |
|
| Improved incremental conductance method for maximum power tracking in photovoltaic power generation |
|
CHENG Zixia1, DING Qingbo1, CHAI Xuzheng2
|
|
1. School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou 450001, China;
2. State Grid Xuchang Power Supply Company, Xuchang 461000, China
|
| Abstract: |
| The traditional incremental conductance method has two main shortcomings: its internal parameters cannot adapt to changes in external irradiance, and it tends to make misjudgments during irradiance variations. Thus this paper proposes an improved incremental conductance method based on irradiance pre-grouping and voltage change trend discrimination. First, the optimal parameters of the algorithm in each group are pre-calculated by pre-grouping the irradiance levels, and the algorithm parameters are then assigned according to the external irradiance group, allowing the algorithm to adapt to the changes in external irradiance. Second, the cause of the algorithm’s misjudgment problem is analyzed, and potential misjudgments are predicted by examining the relationship between irradiance and power trends. The voltage trend is reversed when a misjudgment is predicted, thereby avoiding misjudgment. Finally, a photovoltaic system simulation model is built to verify the proposed method. Simulation results show that the improved incremental conductance method offers better response speed and stability. |
| Key words: incremental conductance method maximum efficiency tracking misjudgment problem photovoltaic control system irradiance pre-grouping |
