STATCOM Control Strategies

This chapter reviews the control systems used to enable STATCOMs to carry out their most important task, which is to deliver reactive power to the electrical grid. Later on, other control systems designed for more advanced applications are discussed, such as compensating the nonlinear loads. Later, the design of the control system when STATCOMs are connected to unbalanced electrical networks is presented. Several strategies are presented for controlling the converter, either as a linear current source which is also known as controlled Voltage Source Converter (VSC) based on the use of Proportional-Integral (PI) controllers, or as nonlinear current source, based on the use of hysteresis bands. Other systems, such as the firing algorithm of the switches or system synchronization with the grid, are also discussed.

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