This paper proposes a novel dual layered multi agent system (MAS) based control system for the use in microgrid operations. In developing a smarter grid capable of withstanding disturbances and/or outages and providin...This paper proposes a novel dual layered multi agent system (MAS) based control system for the use in microgrid operations. In developing a smarter grid capable of withstanding disturbances and/or outages and providing quality service to the consumers, reliable microgrid control architecture is vital. The innovative microgrid control system proposed, makes the microgrid capable of isolating the local grid from effects of any upstream disturbances in the main utility grid by operating disconnected from the main utility via islanding, and it allows the most critical local loads to be supplied by any, available, local power source during such islanded operation. The proposed MAS control architecture is developed using the JADE platform and it is used to control a test network simulated in MATLAB. The results of these simulations show the capability of developing MAS based reliable control mechanism for islanding and load management of microgrids based on the proposed concept.展开更多
为提高微电网的供电可靠率和能源利用率,提出一种计及分时电价的日前经济优化调度方法。首先建立光伏、储能(energy storage system,ESS)、电动汽车(electric vehicles,EV)等主体的功率或能量模型,然后分别采用光伏功率模型及双向长短...为提高微电网的供电可靠率和能源利用率,提出一种计及分时电价的日前经济优化调度方法。首先建立光伏、储能(energy storage system,ESS)、电动汽车(electric vehicles,EV)等主体的功率或能量模型,然后分别采用光伏功率模型及双向长短期记忆(bidirectional long short term memory,Bi-LSTM)模型预测日内光伏及常规负荷功率。结合EV的柔性负荷特性,以最小化系统运维总成本(包括设备运维成本、外网取电成本、储能电池衰减成本等)及EV充电成本建立目标函数。考虑优化问题的多目标、高维特性,选用线性规划求解器求解目标函数。最后选取含光-储-充的某工业园区微电网2021年全年的历史运行数据,首先测试了本文提出的常规负荷及光伏功率预测模型,进而根据光伏出力与常规负荷的匹配差异,选取4种典型日场景测试本文提出的调控算法。结果证明所提功率预测模型及经济调度算法的有效性。展开更多
独立直流微电网中存在的大量恒功率负载(constant power load,CPL)会减小直流微网的阻尼,易引发母线电压的振荡甚至大幅跌落。为此,提出一种有源阻尼方法来提高系统的稳定性,在不增加传感器的前提下,通过在储能电池变换器端口处并联虚...独立直流微电网中存在的大量恒功率负载(constant power load,CPL)会减小直流微网的阻尼,易引发母线电压的振荡甚至大幅跌落。为此,提出一种有源阻尼方法来提高系统的稳定性,在不增加传感器的前提下,通过在储能电池变换器端口处并联虚拟电阻来提高变换器的阻尼,从而抑制其谐振峰值;给出有源阻尼参数的设计方法,并利用频率稳定判据分析所提并联虚拟电阻方法对系统稳定性的影响;还通过仿真对比传统的阻尼方法与本文所提方法的性能。实验结果验证了并联虚拟电阻方法可在较宽频段有效提高独立直流微电网系统稳定性。展开更多
文摘This paper proposes a novel dual layered multi agent system (MAS) based control system for the use in microgrid operations. In developing a smarter grid capable of withstanding disturbances and/or outages and providing quality service to the consumers, reliable microgrid control architecture is vital. The innovative microgrid control system proposed, makes the microgrid capable of isolating the local grid from effects of any upstream disturbances in the main utility grid by operating disconnected from the main utility via islanding, and it allows the most critical local loads to be supplied by any, available, local power source during such islanded operation. The proposed MAS control architecture is developed using the JADE platform and it is used to control a test network simulated in MATLAB. The results of these simulations show the capability of developing MAS based reliable control mechanism for islanding and load management of microgrids based on the proposed concept.
文摘为提高微电网的供电可靠率和能源利用率,提出一种计及分时电价的日前经济优化调度方法。首先建立光伏、储能(energy storage system,ESS)、电动汽车(electric vehicles,EV)等主体的功率或能量模型,然后分别采用光伏功率模型及双向长短期记忆(bidirectional long short term memory,Bi-LSTM)模型预测日内光伏及常规负荷功率。结合EV的柔性负荷特性,以最小化系统运维总成本(包括设备运维成本、外网取电成本、储能电池衰减成本等)及EV充电成本建立目标函数。考虑优化问题的多目标、高维特性,选用线性规划求解器求解目标函数。最后选取含光-储-充的某工业园区微电网2021年全年的历史运行数据,首先测试了本文提出的常规负荷及光伏功率预测模型,进而根据光伏出力与常规负荷的匹配差异,选取4种典型日场景测试本文提出的调控算法。结果证明所提功率预测模型及经济调度算法的有效性。
文摘独立直流微电网中存在的大量恒功率负载(constant power load,CPL)会减小直流微网的阻尼,易引发母线电压的振荡甚至大幅跌落。为此,提出一种有源阻尼方法来提高系统的稳定性,在不增加传感器的前提下,通过在储能电池变换器端口处并联虚拟电阻来提高变换器的阻尼,从而抑制其谐振峰值;给出有源阻尼参数的设计方法,并利用频率稳定判据分析所提并联虚拟电阻方法对系统稳定性的影响;还通过仿真对比传统的阻尼方法与本文所提方法的性能。实验结果验证了并联虚拟电阻方法可在较宽频段有效提高独立直流微电网系统稳定性。
