用于微網(wǎng)系統(tǒng)的儲能變流器研究
發(fā)布時間：2018-10-08 14:16
【摘要】：隨著越來越多的分布式發(fā)電得到應用,分布式發(fā)電的引入對主電網(wǎng)帶來的一些不利影響也受到人們越來越廣泛的關注。為了解決分布式電源與主電網(wǎng)之間的矛盾提出了微電網(wǎng)的概念。由分布式電源、儲能裝置、監(jiān)控系統(tǒng)和保護裝置等組成的微網(wǎng)能夠實現(xiàn)自我控制、保護和管理,已受到全世界廣泛的關注。儲能技術對于微網(wǎng)的安全穩(wěn)定運行起到至關重要的作用,儲能系統(tǒng)可以平抑微網(wǎng)的功率波動,孤網(wǎng)運行時穩(wěn)定母線電壓,并且能夠提供無功補償,提高微網(wǎng)的電能質量。 電池儲能由于技術成熟、可靠性高、成本較低,得到廣泛的應用,本文研究的是作為電網(wǎng)與電池之間連接接口的儲能變流器,研究了儲能變流器的主電路參數(shù)設計及不同工況下的控制策略,通過仿真和實驗的方法進行了驗證。 首先,在分析了儲能變流器的不同系統(tǒng)結構類型的優(yōu)缺點的基礎上選擇了儲能變流器拓撲,分別敘述了儲能變流器中DC/DC變換器和DC/AC變流器的工作原理及控制方法,完成了儲能變流器的主要硬件參數(shù)設計。 其次,研究了儲能技術在風光儲互補微網(wǎng)中的主要應用,從功率平滑、削峰填谷、離網(wǎng)運行三個方面著手設計了儲能變流器的控制策略,分為并網(wǎng)模式下的DC/DC恒流控制、DC/DC下垂控制,離網(wǎng)模式下的DC/AC雙閉環(huán)控制、DC/AC下垂控制。利用Matlab軟件對儲能變流器控制策略進行仿真,驗證了依靠所制定的控制策略能夠實現(xiàn)儲能系統(tǒng)在微網(wǎng)中的主要功能。 最后,通過對儲能變流器功能性實驗和現(xiàn)場的微網(wǎng)系統(tǒng)功能實驗的波形分析,驗證了本文設計的儲能變流器硬件結構及控制策略可以實現(xiàn)設定的功能,表明了設計方案的可行性。
[Abstract]:With more and more applications of distributed generation, people pay more and more attention to the adverse effects of the introduction of distributed generation on the main grid. In order to solve the contradiction between distributed generation and main grid, the concept of microgrid is proposed. The micro-network composed of distributed power supply, energy storage device, monitoring system and protection device can realize self-control, protection and management, which has been paid more and more attention all over the world. The energy storage technology plays an important role in the safe and stable operation of the microgrid. The energy storage system can stabilize the power fluctuation of the microgrid, stabilize the bus voltage during the operation of the isolated grid, provide reactive power compensation, and improve the power quality of the microgrid. Battery energy storage is widely used because of its mature technology, high reliability and low cost. The design of the main circuit parameters and the control strategy under different working conditions are studied and verified by simulation and experiment. Firstly, on the basis of analyzing the merits and demerits of different system structure types of the energy storage converter, the topology of the energy storage converter is selected. The working principle and control method of the DC/DC converter and the DC/AC converter in the energy storage converter are described respectively. The main hardware parameters of the energy storage converter are designed. Secondly, the main application of energy storage technology in the complementary microgrid of wind and storage is studied. The control strategy of the energy storage converter is designed from three aspects: power smoothing, peak cutting and valley filling, and off-grid operation. It is divided into DC/DC constant current control and DC / DC droop control in grid-connected mode and DC/AC double closed loop control in off-grid mode. The control strategy of the energy storage converter is simulated by Matlab software, and it is verified that the main functions of the energy storage system in the microgrid can be realized by the proposed control strategy. Finally, through the waveform analysis of the energy storage converter functional experiment and the field microgrid system function experiment, it is verified that the hardware structure and control strategy of the energy storage converter designed in this paper can achieve the set function. The feasibility of the design is demonstrated.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM46
本文編號：2257076
[Abstract]:With more and more applications of distributed generation, people pay more and more attention to the adverse effects of the introduction of distributed generation on the main grid. In order to solve the contradiction between distributed generation and main grid, the concept of microgrid is proposed. The micro-network composed of distributed power supply, energy storage device, monitoring system and protection device can realize self-control, protection and management, which has been paid more and more attention all over the world. The energy storage technology plays an important role in the safe and stable operation of the microgrid. The energy storage system can stabilize the power fluctuation of the microgrid, stabilize the bus voltage during the operation of the isolated grid, provide reactive power compensation, and improve the power quality of the microgrid. Battery energy storage is widely used because of its mature technology, high reliability and low cost. The design of the main circuit parameters and the control strategy under different working conditions are studied and verified by simulation and experiment. Firstly, on the basis of analyzing the merits and demerits of different system structure types of the energy storage converter, the topology of the energy storage converter is selected. The working principle and control method of the DC/DC converter and the DC/AC converter in the energy storage converter are described respectively. The main hardware parameters of the energy storage converter are designed. Secondly, the main application of energy storage technology in the complementary microgrid of wind and storage is studied. The control strategy of the energy storage converter is designed from three aspects: power smoothing, peak cutting and valley filling, and off-grid operation. It is divided into DC/DC constant current control and DC / DC droop control in grid-connected mode and DC/AC double closed loop control in off-grid mode. The control strategy of the energy storage converter is simulated by Matlab software, and it is verified that the main functions of the energy storage system in the microgrid can be realized by the proposed control strategy. Finally, through the waveform analysis of the energy storage converter functional experiment and the field microgrid system function experiment, it is verified that the hardware structure and control strategy of the energy storage converter designed in this paper can achieve the set function. The feasibility of the design is demonstrated.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM46
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