Reactive power capability of a sub-transmission grid using real-time embedded particle swarm optimization

Cabadag, Rengin Idil; Schmidt, Uwe; Schegner, Peter

doi:10.1109/isgteurope.2014.7028733

“…In [2,3], novel methods are presented for assessing the range of controllable reactive power available at the transmission node for any level of active power exchange with the distribution network. In [4], particle swarm optimisation is used to exploit wind farm active and reactive power control capability to achieve a reactive power exchange level. In [5], the objectives of maintaining safe voltage levels and respecting the reactive power exchange limits in distribution networks are achieved via a ruled-based method and the use of an iterative process.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Overall, the proposed methodologies can be divided into those that have as an objective to minimise deviations from set-points [4,6,7] and those that have as a constraint to keep the reactive power exchange within certain limits [5,8,9]. This paper falls in the second category, and its objective is to keep reactive power exchange between transmission and distribution grids within the limits specified by the TSO.…”

Section: Literature Reviewmentioning

confidence: 99%

Compliance of Distribution System Reactive Flows with Transmission System Requirements

Pediaditis

¹

,

Sirviö

²

,

Ziras

³

et al. 2021

Applied Sciences

2

0

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Transmission system operators (TSOs) often set requirements to distribution system operators (DSOs) regarding the exchange of reactive power on the interface between the two parts of the system they operate, typically High Voltage and Medium Voltage. The presence of increasing amounts of Distributed Energy Resources (DERs) at the distribution networks complicates the problem, but provides control opportunities in order to keep the exchange within the prescribed limits. Typical DER control methods, such as constant cosϕ or Q/V functions, cannot adequately address these limits, while power electronics interfaced DERs provide to DSOs reactive power control capabilities for complying more effectively with TSO requirements. This paper proposes an optimisation method to provide power set-points to DERs in order to control the hourly reactive power exchanges with the transmission network. The method is tested via simulations using real data from the distribution substation at the Sundom Smart Grid, in Finland, using the operating guidelines imposed by the Finnish TSO. Results show the advantages of the proposed method compared to traditional methods for reactive power compensation from DERs. The application of more advanced Model Predictive Control techniques is further explored.

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“…In an earlier work, authors used reactive power from wind farms to maintain system voltage in steady state and during grid disturbance using a particle swarm based optimization method (PSO) [12]. Similarly, a WPP connected to a German sub-transmission system was used in [21] to provide the reactive power needs of the sub-transmission and the transmission network, also based on PSO. A co-ordinated control approach between installed capacitors and distributed energy resources (DERs) is deployed in [22], to increase energy efficiency, whereas; [13] implements optimal power flow to determine optimal reactive power in a network with WPPs to minimize losses.…”

Section: Introductionmentioning

confidence: 99%

Loss Minimization in Distribution Network using Wind Power Plant Reactive Power Support

Baviskar¹,

Das²,

Hansen³

et al. 2021

Preprint

1

0

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<div>The increased penetration of wind power plants (WPPs) in distribution networks challenges the distribution system operators (DSOs) to improve and optimize networks’ operation. A higher amount of local power production translates to more losses in the network. This paper proposes a deterministic optimization methodology to minimize the losses in distribution networks with WPPs, by exploiting WPPs’ capability to control reactive power in coordination with the on-load tap changers from the MV/HV transformer, avoiding the need for network reinforcements. The principal objective is to optimize the reactive power ﬂow in the network. Measurements from a real distribution network with a large share of controllable WPPs under varying wind and load conditions are used for the study. The beneﬁts and the challenges of the optimization methodology are assessed and discussed with respect to active power losses, voltage proﬁle and reactive power. The results show that with reactive power support from WPPs, network losses are reduced by 4.2 %. Higher loss reductions (up to 19 %) can be achieved through a coordinated action between the WPPs and TSO. Furthermore, it is shown that the distribution network can act as an asset to the transmission network for reactive power support, via actively controlling WPP’s reactive power.</div>

show abstract

“…In an earlier work, authors used reactive power from wind farms to maintain system voltage in steady state and during grid disturbance using a particle swarm based optimization method (PSO) [12]. Similarly, a WPP connected to a German sub-transmission system was used in [21] to provide the reactive power needs of the sub-transmission and the transmission network, also based on PSO. A co-ordinated control approach between installed capacitors and distributed energy resources (DERs) is deployed in [22], to increase energy efficiency, whereas; [13] implements optimal power flow to determine optimal reactive power in a network with WPPs to minimize losses.…”

Section: Introductionmentioning

confidence: 99%

Loss Minimization in Distribution Network using Wind Power Plant Reactive Power Support

Baviskar¹,

Das²,

Hansen³

et al. 2021

Preprint

0

View full text Add to dashboard Cite

<div>The increased penetration of wind power plants (WPPs) in distribution networks challenges the distribution system operators (DSOs) to improve and optimize networks’ operation. A higher amount of local power production translates to more losses in the network. This paper proposes a deterministic optimization methodology to minimize the losses in distribution networks with WPPs, by exploiting WPPs’ capability to control reactive power in coordination with the on-load tap changers from the MV/HV transformer, avoiding the need for network reinforcements. The principal objective is to optimize the reactive power ﬂow in the network. Measurements from a real distribution network with a large share of controllable WPPs under varying wind and load conditions are used for the study. The beneﬁts and the challenges of the optimization methodology are assessed and discussed with respect to active power losses, voltage proﬁle and reactive power. The results show that with reactive power support from WPPs, network losses are reduced by 4.2 %. Higher loss reductions (up to 19 %) can be achieved through a coordinated action between the WPPs and TSO. Furthermore, it is shown that the distribution network can act as an asset to the transmission network for reactive power support, via actively controlling WPP’s reactive power.</div>

show abstract

Reactive power capability of a sub-transmission grid using real-time embedded particle swarm optimization

Cited by 7 publications

References 15 publications

Compliance of Distribution System Reactive Flows with Transmission System Requirements

Compliance of Distribution System Reactive Flows with Transmission System Requirements

Loss Minimization in Distribution Network using Wind Power Plant Reactive Power Support

Loss Minimization in Distribution Network using Wind Power Plant Reactive Power Support

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