超导磁储能在微电网中的应用研究
发布时间：2018-11-05 17:25
【摘要】：随着超导电力技术的发展,越来越多的超导电力设备诞生,超导磁储能(SMES)系统可以长期、高效、无损地储存电能,通过解耦控制能在四象限运行,能够实现对电网有功功率以及无功功率进行实时快速独立地调节。一个完整的SMES系统包括五个部分即制冷系统、超导磁体、磁体失超保护、电流变换器、检测控制系统,根据电流变换器的主电路拓扑结构及控制方法的不同,将其分为电流源型SMES和电压源型SMES,对于电流源型SMES可通控制SMES与电网之间的电流大小和相位来调节两者之间无功功率和有功功率的交换,对于电压源型SMES则通过控制电流变换器交流侧出口电压基波幅值与相位来控制有功功率和无功功率输出。这两种类型SMES的电流变换器对交流侧电流或电压幅值和相位的控制都是基于相应的脉冲宽度调制(PWM)策略来完成的。 本文依托云南电网科技项目“微网高温超导磁储能系统在云电科技园示范工程中的应用研究”以电流源型SMES为研究对象,对基于微电网运的SMES系统展开研究。建立了包含SMES系统的微电网PSCAD模型,分别就SMES提供短时供电、故障时刻缓冲、提高微网电能质量、微电网与主电网的平滑投切、优化DG的运行提高微网运行经济性方面进行仿真验证。仿真结果表明,SMES在微电网中可以对电压暂降起到支撑作用并且在微网并网运行时采用PQ控制,孤岛状态下转为VF控制保证微网在不同运行状态下的稳定性。此外,SMES在完成对分布式能源调配的同时大大提高了微电网的经济性,与其他微网储能设比较具有相当的优势,为SMES在微电网中实际运用提供参考。
[Abstract]:With the development of superconducting power technology, more and more superconducting power equipments are born. Superconducting magnetic energy storage (SMES) system can store electric energy for a long time, efficiently and without loss, and can operate in four quadrants by decoupling control. It can adjust the active power and reactive power in real time and independently. A complete SMES system consists of five parts, namely, refrigeration system, superconducting magnet, magnet loss protection, current converter, detection control system, according to the different topology and control methods of the main circuit of the current converter. It can be divided into current source SMES and voltage source SMES, to control the current size and phase between SMES and power network to adjust the exchange of reactive power and active power. For the voltage source type SMES, the active and reactive power output is controlled by controlling the amplitude and phase of the fundamental voltage at the AC side of the current converter. The amplitude and phase of AC side current or voltage are controlled by these two types of SMES current converters based on the corresponding pulse width modulation (PWM) strategy. In this paper, based on Yunnan power grid science and technology project, "the application of microgrid HTS magnetic energy storage system in the demonstration project of cloud electric science park", the SMES system based on microgrid transportation is studied with current source type SMES as the research object. The PSCAD model of microgrid including SMES system is established to provide short time power supply, fault time buffer, improve the power quality of microgrid, and smooth switching between microgrid and main grid. To optimize the operation of DG and improve the operation economy of microgrid are verified by simulation. The simulation results show that SMES can support the voltage sag in the microgrid and use PQ control when the microgrid is connected to the grid. In the isolated island state, the VF control can guarantee the stability of the microgrid under different operation conditions. In addition, SMES greatly improves the economy of microgrid when it completes the distributed energy allocation, which has a considerable advantage compared with other micro-grid energy storage, and provides a reference for the practical application of SMES in microgrid.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM727
本文编号：2312774
[Abstract]:With the development of superconducting power technology, more and more superconducting power equipments are born. Superconducting magnetic energy storage (SMES) system can store electric energy for a long time, efficiently and without loss, and can operate in four quadrants by decoupling control. It can adjust the active power and reactive power in real time and independently. A complete SMES system consists of five parts, namely, refrigeration system, superconducting magnet, magnet loss protection, current converter, detection control system, according to the different topology and control methods of the main circuit of the current converter. It can be divided into current source SMES and voltage source SMES, to control the current size and phase between SMES and power network to adjust the exchange of reactive power and active power. For the voltage source type SMES, the active and reactive power output is controlled by controlling the amplitude and phase of the fundamental voltage at the AC side of the current converter. The amplitude and phase of AC side current or voltage are controlled by these two types of SMES current converters based on the corresponding pulse width modulation (PWM) strategy. In this paper, based on Yunnan power grid science and technology project, "the application of microgrid HTS magnetic energy storage system in the demonstration project of cloud electric science park", the SMES system based on microgrid transportation is studied with current source type SMES as the research object. The PSCAD model of microgrid including SMES system is established to provide short time power supply, fault time buffer, improve the power quality of microgrid, and smooth switching between microgrid and main grid. To optimize the operation of DG and improve the operation economy of microgrid are verified by simulation. The simulation results show that SMES can support the voltage sag in the microgrid and use PQ control when the microgrid is connected to the grid. In the isolated island state, the VF control can guarantee the stability of the microgrid under different operation conditions. In addition, SMES greatly improves the economy of microgrid when it completes the distributed energy allocation, which has a considerable advantage compared with other micro-grid energy storage, and provides a reference for the practical application of SMES in microgrid.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM727
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