Abstract
This paper proposes a novel method for planning active distribution networks (ADNs) with the integration of an active network management (ANM) scheme using coordinated voltage control (CVC) through on-load tap changer (OLTC) transformers. The method was formulated as a security-constrained optimal power flow (SCOPF) problem to minimize total operational costs, which maximizes the utilization of renewable distributed generators (DGs) over a planning horizon. The ANM scheme was applied using OLTC to ensure safe operation and reduce voltage violations in the network. To analyse the impact of ANM, the planning problem was examined both with and without the ANM scheme. Moreover, SCOPF, considering the N-1 line contingency analysis and multi-DG configuration, was implemented to analyse the feasibility of the proposed method and the advantages of ANM under contingency situations. The method was validated on a weakly-meshed 16-bus UK generic distribution system (UKGDS). The results showed that ANM can lower operational costs and maintain network voltage for operation in feasible conditions even in the case of a contingency. Moreover, the ANM scheme mitigated the voltage rise effect caused by DGs and maximized their utilization.
Highlights
Distribution network operators (DNOs) across the UK are adopting active network management (ANM) schemes as a solution to manage the high penetration of distributed generators (DGs) into the networks by actively monitoring and controlling their output power and other network parameters
This paper proposes a novel approach for the planning of weakly meshed distribution networks with the integration of an ANM scheme, i.e., coordinated voltage control (CVC)
With ANM, the power supplied from the grid supply point (GSP) (G1) was always at a minimum level, i.e., 10 MW, while DGs were generating most of the required power to meet load demand and load growth
Summary
RERs contribute to the reduction of carbon emissions, network losses, and electricity generation costs. They introduce many technical challenges for safe network operation due to their stochastic nature of power generation, voltage rise effect at the point of connection, and bi-directional power flow [1,2]. Active network management (ANM) schemes are being applied to deal with such challenges by monitoring and actively controlling RERs and network parameters using advanced control and communication systems. Distribution network operators (DNOs) across the UK are adopting ANM schemes as a solution to manage the high penetration of DGs into the networks by actively monitoring and controlling their output power and other network parameters. ANM is not yet implemented on a large scale due to advocate control and communication infrastructure and regulatory barriers
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