Advanced Control of AC / DC Power Networks: System of by Abdelkrim Benchaib

By Abdelkrim Benchaib

The energy engineering area is dealing with large demanding situations, with an expanding curiosity in intermittent renewable energies that are enforcing significant technical obstacles. working ever in the direction of their limits, the industry-standard AC strength grids are topic to instabilities.

This publication offers an perception into DC grid platforms, delivering fascinating matters to good managed strength grids, unlike present AC structures which supply the best and so much fiscal connection procedure for brief distances.

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Extra resources for Advanced Control of AC / DC Power Networks: System of Systems Approach Based on Spatio-temporal Scales

Example text

Finally, control of actuators for power network are shortly discussed. – In Chapter 3, we recall stability analysis tools. Thereafter, a detailed modeling of AC power network dynamics with swing equations will be derived. Next, an exact linearized model for swing equation will be proposed. It is one of the main results presented in this book. – In Chapter 4, space dimensions of power networks will be addressed. Then, considering the new expression of the swing equation, an inter-area oscillations damping controller will be proposed.

The absence of the reactive power makes the power flow calculation easier, since only active power is concerned. The second specification of the DC grid is that the frequency is absent. Thus, only resistances are introduced to calculate the nodal admittance matrix in steady state regimes. As done in practice, a shunt resistance that represents the losses of the converter is inserted into the admittance matrix. Generally, each node could control the active power injection or the DC bus voltage. In a P-controller bus, the injected power is kept constant.

From the control point of view, there is an outstanding particularity in this control strategy, where the concept of reference values of active power and DC voltage given by the operator of the system is changed by the idea of set points. The difference lies on the new steady state condition after a disturbance. In the droop control, although the set points are equally given by the operator as a result of an optimal power flow in a nominal condition, it is not expected that the power, neither the voltage, return to their initial values after a disturbance.

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