Robust voltage regulation in unbalanced radial distribution system under uncertainty of distributed generation and loads

Robust Voltage Control Considering Uncertainties of Renewable Energies and Loads via Improved Generative Adversarial Network

“…where U imin is the lower limit for the i th node, which is equal to 0.95 for generic nodes and 0.9 for OLTC secondary nodes; U imax is the upper limit for the i th node, which is equal to 1.05 for generic nodes and 1.1 for OLTC secondary nodes [4]; and I lmax is the upper limit of the current in the l th branch.…”

“…On the other hand, the fluctuation of wind speed and light intensity leads to the uncertainties of output power of renewable generation units. In this case, the voltage control strategy of the DVC model may not be safe for the distribution network on the high penetration of distributed generation units [4]. Therefore, the power operation and planning department should take the uncertainties of renewable energies and loads into account when making decisions for voltage control.…”

Robust reactive power optimisation and voltage control method for active distribution networks via dual time‐scale coordination

“…A robust voltage control model is described in [8], where a scenario generation and reduction method is used, but slow controlling devices such as ULTCs and MSCs are not considered. On the basis of scenario generation and reduction method, Daratha et al [9] proposed a robust voltage regulation method, where monotonicity assumption is necessary for scenario reduction. Also, the discrete variables introduced by ULTCs and MSCs are tackled with an empirical two‐step solution method.…”

“…The main contributions of this paper include: No literatures before have ever reported such a dual time‐scale coordinated control scheme to reduce the uncertainty of load and DG for three‐phase distribution networks. Different from [9] which is essentially based on scenario method, the coordination is directly cast as a multilevel robust optimisation problem in this paper. Both the convergence of the dual time‐scale coordination and the optimality under uncertainties are guaranteed theoretically. An RVO model is developed to determine the operation of slow devices and guarantee that the subsequent fast controls can maintain the system's voltage security under specified uncertainties. The remainder of this paper is organised as follows: in Section 2, the RVO model for slow control is formulated.…”

“…No literatures before have ever reported such a dual time‐scale coordinated control scheme to reduce the uncertainty of load and DG for three‐phase distribution networks. Different from [9] which is essentially based on scenario method, the coordination is directly cast as a multilevel robust optimisation problem in this paper. Both the convergence of the dual time‐scale coordination and the optimality under uncertainties are guaranteed theoretically.…”