基于温控类负荷的需求响应的研究

发布时间：2018-06-16 07:55

本文选题：负荷侧控制 + 电网友好　；参考：《浙江大学》2015年硕士论文

【摘要】：随着国民经济的高速发展,电力工业发展进入崭新的阶段,电网规模显著扩大,结构上不断扩张。同时随着可再生能源接入,使得电网尤其是用户侧变得更加复杂。从另一方面来说,负荷也可以作为一种资源来响应电网的调度,甚至是自主地响应电网的需求,使得负荷本身成为一种对于电网友好的资源。同时电力电子技术在不断发展让更多变频电器,如变频空调、变频冰箱进入人们的生活。变频技术的逐步成熟使变频电器在市场上占有的比重逐年升高。因此,针对变频类温控负荷的研究,对于缓解电网压力改善电网运行状态具有深远的意义。本文首先分析了电机驱动型温控类负荷在电网年、月、日负荷曲线中的特性,以空调负荷为例,分析季节、温度变化对于其负荷特性的影响。重点阐述其在电网日负荷曲线的占有结构,得出其广泛分布且数量巨大的结论。其次对空调类负荷介绍了其负荷建模的相应理论与方法,分析其在电网中的模型比较几种建模方法针对计算精度、复杂程度,推导了感应电机并联等效电路模型。之后,提出了针对电网有功缺失情况下,在负荷侧实时检测电器设备所在区域的电网频率同时自主控制负荷运行状态的方法,结论表明该方法可以很好的补充电网紧急情况下有功功率的缺额,减少电网调度的频繁程度。最后针对之前所建的空调类负荷感应电机模型,利用算例分析该控制方法在复杂电网中对于提高电网暂态稳定性的优势。
[Abstract]:With the rapid development of the national economy, the electric power industry has entered a new stage. At the same time, with the renewable energy access, the power grid, especially the user side, becomes more complex. On the other hand, load can also be used as a resource to respond to the dispatch of the power grid, or even to respond to the demand of the power grid independently, making the load itself a kind of grid friendly resource. At the same time, the development of power electronics technology makes more frequency conversion appliances, such as frequency conversion air conditioning, frequency conversion refrigerators into people's lives. The frequency conversion technology gradually matures causes the frequency conversion electric appliance in the market the proportion to rise year by year. Therefore, the research of temperature control load with frequency conversion is of great significance to alleviate the pressure of power grid and improve the operation state of power network. In this paper, the characteristics of motor driven temperature control load in the load curve of year, month and day are analyzed. Taking air conditioning load as an example, the influence of season and temperature on load characteristics is analyzed. The occupation structure of daily load curve in power network is expounded, and the conclusion that it is widely distributed and large in quantity is obtained. Secondly, the paper introduces the corresponding theory and method of load modeling for air conditioning, and analyzes the model comparison in power grid. According to the accuracy and complexity of calculation, the parallel equivalent circuit model of induction motor is deduced. Then, the method of real-time detecting the power network frequency in the area where the electrical equipment is located is put forward to control the load operation state independently under the condition of the lack of active power in the power grid. The results show that this method can supplement the active power deficit and reduce the frequency of power dispatching. Finally, based on the previous model of air-conditioner load induction motor, the advantages of the control method in improving the transient stability of the power system in complex power systems are analyzed by using a numerical example.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM714

【参考文献】