共查询到13条相似文献,搜索用时 15 毫秒
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Darmawan Sutanto 《中国电子科技》2011,9(1)
The electric industry is being transformed from a centralized network to one that is less centralized and allows more consumer interaction in the form of a smart grid. 相似文献
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本文提出一种基于占空比前馈的储能电池系统控制方法,该方法针对电池充电与放电两种状态下控制系统PWM调制特点,设定两种不同的占空比前馈增量算法,以提升双向DC-DC变换器Buck模式与Boost模式的响应速度及稳定性。详细阐述了该控制方法的系统结构与前馈增量算法流程设计,并搭建了应用该方法的储能电池系统仿真模型。通过仿真... 相似文献
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The wind energy generation,utilization and its grid penetration in electrical grid are increasing world-wide.The wind generated power is always fluctuating due to its time varying nature and causing stability problem.This weak interconnection of wind generating source in the electrical network affects the power quality and reliability.The localized energy storages shall compensate the fluctuating power and support to strengthen the wind generator in the power system,in this paper,it is proposed to control the voltage source inverter(VSI)in current control mode with energy storage,that is,batteries across the dc bus.The generated wind power can be extracted under varying wind speed and stored in the batteries.This energy storage maintains the stiff voltage across the dc bus of the voltage source inverter.The proposed scheme enhances the stability and reliability of the power system and maintains unity power factor,it can also be operated in stand-alone mode in the power system.The power exchange across the wind generation and the load under dynamic situation is feasible while maintaining the power quality norms at the common point of coupling.It strengthens the weak grid in the power system.This control strategy is evaluated on the test system under dynamic condition by using simulation.The results are verified by comparing the performance of controllers. 相似文献
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经济的快速发展对能源的依赖性越来越强。电能是经济稳定增长强有力的保障,同时电力系统的发展也给环境带来很大破坏。因此,在促进电力系统高效安全运行时,需考虑减少对环境的破坏。储能技术是电网运行中的重要部分,它通过对电力需求的调整以加强再生能源的可利用率,来保障电力系统的正常运行。文中从我国电力储能现状、电力系统的现实需求进行分析,探讨了储能技术在电力系统中的应用。 相似文献
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基于RFID智能卡和高校图书馆读者群的特点,设计了一种高校图书馆自助式门禁系统.系统能够实现图书借阅、管理的自动化,服务方式的主动化、一体化. 相似文献
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通过对美国霍尼韦尔公司的全智能集散控制系统的介绍,对比分析了该项技术的优势和传统可编程序控制器系统的不足,提出了全智能集散控制系统在我国邮政设备控制中应用的建议。 相似文献
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以户用储能系统为研究对象,采用下垂控制调节电池功率,即由逆变器控制直流母线,电池的双向DC/DC控制器根据母线电压调节电池功率,该控制方法的优势在于方便实现多直流源并联。双向DC/DC变换器的电路拓扑采用交错式双向Boost变换器,并给出了下垂控制器的具体设计方法。针对系统中普遍存在的因电压采样偏差(逆变器与DC/DC变换器的电压采样是独立的,存在偏差)导致的功率控制偏差问题,提出了两种电池功率自适应控制策略:电压补偿和功率补偿,并给出了具体的实施方法。最后设计了一台5 kW样机,分别实现了两种策略,并进行了对比分析,实验结果验证了所提出策略的有效性。 相似文献
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Renewable energy generation cannot be consistently predicted or controlled. Therefore, it is currently not widely used in the electricity market, which requires dependable production. In this study, reliability- and variance-based controls of energy storage strategies are proposed to utilize renewable energy as a steady contributor to the electricity market. For reliability-based control, photovoltaic (PV) generation is assumed to be registered in the power generation plan. PV generation yields a reliable output using energy storage units to compensate for PV prediction errors. We also propose a runtime state-of-charge management method for sustainable operations. With variance-based controls, changes in rapid power generation are limited through ramp rate control. This study introduces new reliability and variance indices as indicators for evaluating these strategies. The reliability index quantifies the degree to which the actual generation realizes the plan, and the variance index quantifies the degree of power change. The two strategies are verified based on simulations and experiments. The reliability index improved by 3.1 times on average over 21 days at a real power plant. 相似文献