| 王巍.SOFC/MGT混合发电系统变工况控制模式及性能分析[J].,2013,53(5):653-658 |
| SOFC/MGT混合发电系统变工况控制模式及性能分析 |
| Analyses of part-load control modes and their performance of a SOFC/MGT hybrid power system |
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| DOI：10.7511/dllgxb201305006 |
| 中文关键词: SOFC/MGT 混合发电系统 控制模式 变工况性能 运行范围 系统效率 |
| 英文关键词: solid oxide fuel cell / micro gas turbine (SOFC/MGT) hybrid power system control mode part-load performance operation range system efficiency |
| 基金项目:辽宁省自然科学基金资助项目(20092155) |
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| 中文摘要: |
| 以220 kW的SOFC/MGT 混合发电系统为研究对象,建立了相应的数学模型,分析了不同控制模式对混合发电系统变工况性能的影响．结果表明:对于220 kW的SOFC/MGT混合发电系统,在单独SOFC燃料控制模式(Case 1)下,系统的稳定负荷必须大于70%；在变转速控制模式(Case 2)下,系统的稳定负荷必须大于77%；而在定转速恒定电池温度的控制模式(Case 3)下,系统最低负荷可以低到59%．在相同负荷条件下,Case 2对应的系统效率最高,Case 1对应的系统效率最低保证混合发电系统的高效率,并扩大混合发电系统的运行范围,提出了一种新的控制模式,可以使得混合发电系统最低负荷达到45%,而系统效率始终保持在56.4%以上． |
| 英文摘要: |
| Based on the 220 kW solid oxide fuel cell / micro gas turbine (SOFC/MGT) hybrid power system existing, the relevant mathematical models were established and the study of control modes on part-load performance of hybrid power system was carried out. The simulation results indicate that the 220 kW SOFC/MGT hybrid power system adjustable range must be more than 70% of the design output power for the SOFC fuel only control mode (Case 1), and more than 77% of the design output power for the variable rotational speed control mode (Case 2), and more than 59% of the design output power for the constant rotational speed and SOFC temperature control mode (Case 3). There is the highest efficiency for Case 2, but the lowest one for Case 1 at the same load. To extend the hybrid power system operation range and ensure the system efficiency and safety, a new control mode is proposed in which the hybrid power system may operate at lowest load of 45% of design output power and keep efficiency at above 56.4%. |
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