| 引用本文: | 袁建华,高厚磊,高 峰.多光伏发电直流网及其控制策略[J].电力自动化设备,2011,31(11): |
| YUAN Jianhua,GAO Houlei,GAO Feng.DC network based on multiple photovoltaic power generations and its control[J].Electric Power Automation Equipment,2011,31(11): |
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| 摘要: |
| 提出一种多光伏发电直流网拓扑结构，系统包含多光伏电池、蓄电池、直流母线以及功率因数校正、双向直流变换等电路。光伏电池因地制宜分布式配置，并通过直流变换器连接到低压直流分支母线，直流变换器依据分支母线电压变化情况，实时调节光伏电池输出功率以满足负载用电及确保分支母线电压稳定；高压主母线通过双向直流变换器连接各供电单元以及蓄电池，双向直流变换器通过主母线实时调节各分支母线电能分配，当整体发电还有剩余时为蓄电池充电，而出现功率需求缺额时由蓄电池放电补充。依据能量平衡原理，对系统母线电压进行控制。为提高供电可靠性，光伏发电系统通过功率因数校正电路与公共电网单向联系。Matlab环境下系统模型仿真证明了所提控制方法的正确性与可行性。 |
| 关键词: 发电系统 光伏电池 多光伏发电 直流网 母线 能量平衡 直流变换器 |
| DOI： |
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| 基金项目:山东省科技攻关项目（210GGX10706） |
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| DC network based on multiple photovoltaic power generations and its control |
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YUAN Jianhua, GAO Houlei, GAO Feng
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School of Electrical Engineering，Shandong University，Ji’nan 250061，China
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| Abstract: |
| A topology of DC network based on multiple photovoltaic power generations is proposed，which consists of multiple photovoltaic cells，battery，DC buses，power factor correction and bidirectional DC-DC converters. The distributed photovoltaic cell connects with the low voltage DC branch bus through DC-DC converter，which regulates the output of photovoltaic cell in real time according to branch bus voltage，while the main DC bus connects with the branch buses and battery through bidirectional DC-DC converter，which regulates the energy distribution in real time via main bus. When the generated power is greater than the load，the battery is charged，otherwise discharged. The main bus voltage is controlled according to the energy balance principle and the multiple photovoltaic power generation system is tied to grid via the power factor correction circuits. The correctness and feasibility of the proposed control method are verified by simulations with Matlab for system model. |
| Key words: electric power generation photovoltaic cells multiple photovoltaic power generations DC network bus energy balance DC-DC converters |
