Including active voltage level management in planning of distribution networks with distributed generation

Abstract

The existing distribution networks are designed based on the assumption of unidirectional power flows. The amount of distributed generation (DG) is, however, constantly increasing which creates a need to revise the current network operation and planning principles. This paper focuses on voltage level management issues related to DG. The effect of different kinds of voltage level management strategies on distribution network planning is discussed and a planning procedure regarding voltage issues when a new DG unit is interconnected to an existing distribution network is proposed. Index Terms--Active voltage level management, distributed generation, network information system (NIS), network planning

Optimal voltage control strategies for day-ahead active distribution network operation

“…(8) and (9) calculate active and reactive power injections at bus i, respectively. The network admittance matrix is given by Y ij = G ij + i × B ij .…”

“…In mitigating voltage problems, predefined steps tap changing steps, Q regulation of DG units and PQ regulation of DG units are initiated sequentially until the problem is alleviated. In the studies [4,8], the authors presented a method to enable distribution system operators to integrate the voltage level management potential of DG units in their network operation and planning principles. These studies are efforts to relate the vast optimization and rule-based coordinated voltage control theoretical studies to the practical conditions of the existing network.…”

“…These studies are efforts to relate the vast optimization and rule-based coordinated voltage control theoretical studies to the practical conditions of the existing network. In [8], a planning procedure is proposed so that implementation in the currently used network planning tools is convenient.…”

“…In the statistical planning, one year load and production curves were used to conduct load flows which can then be used to evaluate the costs of different control strategies [4]. Nevertheless, the rule-based procedures in [4,8] do not investigate the costs of the optimal coordination of different voltage control strategies. A comprehensive voltage control strategy among OLTCs, substation switched capacitors and feeder-switched capacitors is presented in [9].…”

Coordinated voltage control in medium and low voltage distribution networks with wind power and photovoltaics

“…Three different networks have been taken into account. Distribution network planning for distribution networks with DG has been discussed in [10]. Local and coordinated control strategies are taken into account.…”