| 引用本文: | 赵德芳,杨丽虎,杜朝阳,等.小型灌溉泵站以电折水系数影响因素研究[J].灌溉排水学报,2025,44(4):57-64. |
| ZHAO Defang,YANG Lihu,DU Chaoyang,et al.小型灌溉泵站以电折水系数影响因素研究[J].灌溉排水学报,2025,44(4):57-64. |
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| 摘要: |
| 【目的】分析小型灌溉泵站以电折水系数（Tc）的影响因素，得出Tc动态订正方法，为自动化、高精度的以电折水评估提供依据。【方法】通过理论分析小型灌溉泵站以电折水系数的影响因素，从能量平衡原理入手，制定Tc计算方法，分析扬程、出水口位置、水源、水位等因素对Tc的影响。【结果】Tc是动态变化的，扬程是其主要影响因素，灌溉过程中需要对首部压力和水源水位进行跟踪监测，并对Tc进行动态订正；提出以“首部压力-水深”为基础的PWT和参考电泵效率的2种PWNT模式，用于Tc的动态修正，得到的Tc关系曲线具有较高的决定系数（R2分别为0.983 1和0.998 5）。【结论】应用PWT或PWNT模式可将计量误差控制在1.5%或3%以内；利用电泵效率的相对稳定性可以简化Tc的实测工作。本研究可用于带有水泵控制器的小型灌溉泵站，实现高精度的自动化以电折水计量。 |
| 关键词: 泵站；以电折水系数；影响因素；计算方法 |
| DOI：10.13522/j.cnki.ggps.2024290 |
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| Key factors influencing electricity-to-water conversion coefficient in small irrigation pumping stations |
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ZHAO Defang, YANG Lihu, DU Chaoyang, LIU Enmin, ZHANG Chunyue, HE Wangang
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1. Water Resources Bureau of Lingcheng District, Dezhou 253500, China; 2. Key Lab of Water Cycle and Related Land
Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences,
Beijing 100101, China; 3. Water Resources Bureau of Linyi County, Dezhou 251500, China;
4. Water Resources Bureau of Pingyuan County, Dezhou 253199, China
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| Abstract: |
| 【Background and Objective】The electricity-to-water conversion coefficient is a key parameter for assessing the efficiency of pumping stations. This study investigates the factors influencing this coefficient in small irrigation pump stations and proposes a method for its calculation.【Method】The analysis was based on energy balance principles, from which we developed a new conceptual model for calculating the electricity-to-water conversion coefficient in pump stations. The primary influencing factors were identified, and a numerical experimental system was established to examine the impact of factors such as head lift, outlet location, and water table depth. Two models, one based on head pressure-water depth (PWT), and the other one based on the electricity-to-water constant and pump efficiency (PWNT), were proposed to calculate the relationship between the electricity-to-water conversion coefficient and the influencing factors.【Result】The electricity-to-water conversion coefficient was found to be dynamically variable, with head lift being the most significant influencing factor. Additionally, monitoring pump outlet pressure and water table depth during irrigation was essential for adaptively adjusting the conversion coefficient. Comparison with experimental data confirmed the accuracy of both models, with determination coefficients of 0.983 1 for the PWT model and 0.998 5 for the PWNT model.【Conclusion】Both the PWT and PWNT models effectively control metering errors within 1.5% to 3%, offering a practical and reliable method for measuring the electricity-to-water conversion coefficient in small irrigation pump stations. The proposed approach simplifies in situ measurements, thereby enhancing measurement accuracy and reliability. These improvements are crucial for increasing water use efficiency and optimizing water resource management in irrigation districts. |
| Key words: pumping station; electricity-to-water conversion coefficient; influencing factors; calculation method |
