Simultaneous Decoupling Voltage Amplitude and Frequency Control of Self-Excited Induction Generators 1=Engineering 2=Electrical Motors and Drive

自激感应发电机的同步解耦电压幅度和频率控制 1=工程 2=电动机和驱动器

• 批准号: 2073845
• 金额: --
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2073845
• 关键词: Simultaneous; Decoupling; Voltage; Amplitude; Frequency

Background. Self-excited induction generators (SEIG) have found wide application in autonomous (off-grid) electricity generating systems with prime movers based on renewables (wind- and hydro-turbines) or combustion engines. The main advantage of SEIGs compared to synchronous generators is that they are relatively inexpensive and possess natural short-circuit protection properties. The main drawback of SEIGs is their poor voltage regulation due to the change of both generated voltage amplitude and frequency with the change of load in addition to their dependence on the prime mover's velocity and excitation capacitance. In many cases this drawback results in a lot of engineers prefer to use permanent magnet synchronous generators instead of the SEIG. Whereas the solutions for the voltage amplitude control of the SEIG are widely presented in the literature, the problem of the simultaneous dynamic control of the voltage amplitude and frequency has not been analytically solved till now. There are some intuitive solutions feasible in steady states based on additional controllable dump loads [1] or useful controllable loads like water supply pumps [2], [3] which reduces the efficiency of the generating system and not suitable for dynamic control.Goal of the research. To develop a systematic approach based on control theory for the design of decoupled control of the voltage amplitude and frequency of the SEIG leading to independent regulation of the voltage amplitude and frequency.ObjectivesTo develop a control oriented model of SEIG with two outputs: voltage amplitude and frequency.To design decoupling control of the voltage amplitude and frequency.To develop a block diagram of the control system including STATCOM for amplitude regulation and voltage optimiser for the frequency regulation.To set up an experimental test bench and determine parameters of the block diagram.To simulate the control system in Matlab/Simulink.To prototype rapidly the control system using dSpace or OPAL-RT.To do the experimental research of the decoupled control.To explore the case of single phase induction generator driven by air scroll motor.Key methodologies. Linearisation of the nonlinear model of SEIG in the synchronous reference frame [4] performed for the frequency and voltage amplitude channels. Decoupling interconnected frequency and amplitude control channels.Novelty of the research. For the first time, the solution of simultaneous dynamic decoupling control of the voltage amplitude and frequency will be found. Applicability of the voltage optimisation technique for the frequency control will be tested.Practical value. The proposed system should make autonomous induction generators comparable with permanent magnet synchronous generators in sense of the voltage control quality. The voltage optimisation for the frequency control leads to no power dissipation in dummy loads.

背景自激感应发电机（SEIG）已经在具有基于可再生能源（风力涡轮机和水力涡轮机）或内燃机的原动机的自主（离网）发电系统中得到广泛应用。与同步发电机相比，SEIG的主要优点是它们相对便宜，并且具有自然的短路保护特性。SEIG的主要缺点是其差的电压调节，由于除了它们依赖于原动机的速度和励磁电容之外，所产生的电压幅度和频率都随着负载的变化而变化。在许多情况下，这个缺点导致许多工程师更喜欢使用永磁同步发电机而不是SEIG。尽管SEIG的电压幅度控制的解决方案在文献中被广泛地提出，但是电压幅度和频率的同时动态控制的问题至今尚未被解析地解决。有一些直观的解决方案在稳定状态下是可行的，这些解决方案基于额外的可控转储负载[1]或有用的可控负载，如供水泵[2]，[3]，这降低了发电系统的效率，不适合动态控制。开发一种基于控制理论的系统方法，用于设计SEIG的电压幅度和频率的解耦控制，从而独立调节电压幅度和频率。ObjectivesTo开发一种具有两个输出的SEIG的面向控制的模型：设计了电压幅值和频率的解耦控制，给出了包括STATCOM在内的控制系统的框图，介绍了一种新型的风力发电机调速系统的设计方法，包括：对风力发电机的调速系统进行了研究，设计了风力发电机的调速系统，对风力发电机的调速系统进行了研究;搭建了风力发电机的调速系统实验台，确定了系统框图中的参数;在Matlab/Simulink中对风力发电机的调速系统进行了仿真;利用dSpace或OPAL-RT对风力发电机的调速系统进行了快速原型设计;对风力发电机的解耦控制进行了实验研究;对风力发电机的调速系统进行了研究。同步参考系[4]中SEIG非线性模型的线性化，用于频率和电压幅度通道。解耦互连频率和幅度控制通道。研究的新奇。首次提出了电压幅值和频率同时动态解耦控制的解决方案，验证了电压优化技术在频率控制中的适用性，具有一定的实用价值。所提出的系统应使自主感应发电机的电压控制质量的意义上的永磁同步发电机相媲美。频率控制的电压优化导致虚拟负载中没有功耗。