直流微电网下并联变换器稳定性控制仿真
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摘要
分布式可再生能源构成的直流微电网存在着DC-DC变换器并联运行的情况,由于自然状态下分布式能源供给会随自然条件的波动而波动,常会出现并联变换器输出电压不同的情况,使变换器间出现环流,造成变换器的损坏。为抑制环流的影响,将在逆变器控制中常使用的下垂控制与电压电流双环控制结合形成新型控制策略,并将该控制策略应用于并联DC-DC变换器的控制中。通过Simulink离线仿真可以看出所提出的控制策略不仅能够有效抑制并联DC/DC变换器之间的环流,且可以降低了直流母线电压的波动。最后使用RT-LAB完成仿真模型的实时化,并从DC-DC变换器控制算法实物化角度,完成RT-LAB的半实物仿真平台构建,进一步验证该控制算法的可靠性。
The situation that DC-DC converters work in parallel operation exists in DC microgrid which consists of distributed renewable energy. In the practical situation, the output voltages of parallel converters are different, due to the distributed energy supply fluctuates with the fluctuations of natural conditions. This circumstances can lead to a circulating current between the converters, causing the damage of converters. In order to inhibit the impact of circulating current, we combined the droop control with voltage-current double loop control to a new control strategy, and apply this control strategy to the control of parallel DC-DC converters. in the simulation based on Simulink shows that the proposed control strategy can not only reduce the fluctuation of DC bus voltage, but also effectively suppress the circulating current between parallel DC-DC converters. Finally,we realized the strategy in practical and completed the platform of HIL(Hardware In Loop) simulation to further verify its feasibility.
The situation that DC-DC converters work in parallel operation exists in DC microgrid which consists of distributed renewable energy. In the practical situation, the output voltages of parallel converters are different, due to the distributed energy supply fluctuates with the fluctuations of natural conditions. This circumstances can lead to a circulating current between the converters, causing the damage of converters. In order to inhibit the impact of circulating current, we combined the droop control with voltage-current double loop control to a new control strategy, and apply this control strategy to the control of parallel DC-DC converters. in the simulation based on Simulink shows that the proposed control strategy can not only reduce the fluctuation of DC bus voltage, but also effectively suppress the circulating current between parallel DC-DC converters. Finally,we realized the strategy in practical and completed the platform of HIL(Hardware In Loop) simulation to further verify its feasibility.
引文
[1] B Bose. Global Warming: Energy, Environmental Pollution,and the Impact of Power Electronics[J]. IEEE Industrial Electronics Magazine,2010,4(1):6-17.
[2] B K Bose. Global Energy Scenario and Impact of Power Electronics in 21st Century[J]. IEEE Transaction on Industrial Electronics, 2013,60(7):2638-2651.
[3] G Spagnuolo, et al. Renewable Energy Operation and Conversion Schemes:A Summary of Discussions During the Seminar on Renewable Energy System[J]. IEEE Industrial Electronics Magazine, 2010,4(1): 38-51.
[4] X Yang, et al. A Comprehensive Review on the Development of Sustainable Energy Strategy and Implementation in China[J]. IEEE Transactions on Sustainable Energy, 2010,1(2):57-65.
[5] 李俊峰,时璟丽. 国内外可再生能源政策综述与进一步促进我国可再生能源发展的建议[J]. 可再生能源, 2006,(1):1-6.
[6] 黄伟煌,胡书举,高俊娥,许洪华. Boost型PWM整流器并联环流机理分析及抑制策略[J]. 电力系统自动化, 2014,(19):96-101,107.
[7] 熊妍,沈燕群,江剑,何湘宁. IGBT损耗计算和损耗模型研究[J]. 电源技术应用, 2006: 55-59.
[8] J W Kim, H S Choi, and B H Cho. A novel droop method for converter parallel operation[J]. Power Electronics, IEEE Transactions on, Jan 2002,17(1):25-32.
[9] 黄秀琼,高文杰,井天军,杨明皓. 基于下垂特性的微电网协调控制策略研究[J]. 可再生能源, 2012,30(11):30-35.
[10] 周林,贾芳成,郭珂,冯玉. 采用RT-LAB的光伏发电仿真系统试验分析[J]. 高电压技术, 2010,36(11):2814-2820.
[11] 李霞林,郭力,王成山,李运帷. 直流微电网关键技术研究综述[J]. 中国电机工程学报, 2016,36(01):2-17.
[12] 姜东红,吴根水,屠宁. RT-LAB软件在半实物仿真系统中的应用[J]. 测控技术, 2008,27(4):71-73.
[2] B K Bose. Global Energy Scenario and Impact of Power Electronics in 21st Century[J]. IEEE Transaction on Industrial Electronics, 2013,60(7):2638-2651.
[3] G Spagnuolo, et al. Renewable Energy Operation and Conversion Schemes:A Summary of Discussions During the Seminar on Renewable Energy System[J]. IEEE Industrial Electronics Magazine, 2010,4(1): 38-51.
[4] X Yang, et al. A Comprehensive Review on the Development of Sustainable Energy Strategy and Implementation in China[J]. IEEE Transactions on Sustainable Energy, 2010,1(2):57-65.
[5] 李俊峰,时璟丽. 国内外可再生能源政策综述与进一步促进我国可再生能源发展的建议[J]. 可再生能源, 2006,(1):1-6.
[6] 黄伟煌,胡书举,高俊娥,许洪华. Boost型PWM整流器并联环流机理分析及抑制策略[J]. 电力系统自动化, 2014,(19):96-101,107.
[7] 熊妍,沈燕群,江剑,何湘宁. IGBT损耗计算和损耗模型研究[J]. 电源技术应用, 2006: 55-59.
[8] J W Kim, H S Choi, and B H Cho. A novel droop method for converter parallel operation[J]. Power Electronics, IEEE Transactions on, Jan 2002,17(1):25-32.
[9] 黄秀琼,高文杰,井天军,杨明皓. 基于下垂特性的微电网协调控制策略研究[J]. 可再生能源, 2012,30(11):30-35.
[10] 周林,贾芳成,郭珂,冯玉. 采用RT-LAB的光伏发电仿真系统试验分析[J]. 高电压技术, 2010,36(11):2814-2820.
[11] 李霞林,郭力,王成山,李运帷. 直流微电网关键技术研究综述[J]. 中国电机工程学报, 2016,36(01):2-17.
[12] 姜东红,吴根水,屠宁. RT-LAB软件在半实物仿真系统中的应用[J]. 测控技术, 2008,27(4):71-73.