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Instantaneous p-q Power Theory for Control of Compensators in Micro-Grids

机译:用于微电网补偿器控制的瞬时p-q功率理论

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摘要

The main objective of this tutorial is to present the basic concepts on the instantaneous p-q Theory and then show its applicability for controlling switching converters connected in a micro-grid. These converters can be used for connecting renewable energy sources (solar, wind, and others) to the micro-grids or for harmonic, reactive power or unbalance compensation, and even for voltage regulation. The emphasis is given on the compensation characteristics derived from the p-q Theory, and simulation results of test cases are shown. Special attention is put on the oscillating component of the instantaneous real power, as it may produce torque oscillations or frequency variations in weak systems (micro-grids) generators. This oscillating component, as defined in the p-q Theory, gives the amount of oscillating energy between the source and the load, and its compensation through a switching compensator must have an energy storage element to exchange it with the load. With the p-q Theory this energy storage element can be easily calculated as a function of the average component of the instantaneous real power, which depends on the observation period.
机译:本教程的主要目的是介绍有关瞬时p-q理论的基本概念,然后说明其在控制微电网中连接的开关转换器方面的适用性。这些转换器可用于将可再生能源(太阳能,风能和其他能源)连接到微电网,或者用于谐波,无功功率或不平衡补偿,甚至用于电压调节。重点介绍了从p-q理论得出的补偿特性,并给出了测试案例的仿真结果。要特别注意瞬时有功功率的振荡分量,因为它可能在弱系统(微电网)发电机中产生转矩振荡或频率变化。根据p-q理论中的定义,该振荡分量给出了源和负载之间的振荡能量,并且通过开关补偿器进行的补偿必须具有储能元件才能与负载交换能量。借助p-q理论,可以轻松地根据瞬时有功功率的平均分量来计算该储能元件,该平均有功功率取决于观察周期。

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