TSO-DSO Performance Considering Volt-Var Control at Smart-Inverters: Case of Vestfold and Telemark in Norway

Pettersen, Daniel; Melfald, Emil Ghieh; Chowdhury, A H; Acosta, Martha N.; González-Longatt, Francisco; Topić, Danijel

doi:10.1109/sst49455.2020.9264097

Cited by 14 publications

(18 citation statements)

References 16 publications

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“…The IEEE std 1547-2018 and the concept of a smart inverter allows the drawing of the main features of the so-called: Smart solar photovoltaic inverters; the features comprise at a minimum the following [8], [11]:…”

Section: International Journal Of Electrical and Computer Engineering...mentioning

confidence: 99%

Performance Assessment of TSO–DSO using Volt-Var Control at Smart-Inverters

Astapov

Trashchenkov

González-Longatt

et al. 2022

Int. j. electr. comput. eng. syst. (Online)

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The massive penetration of distributed energy resources (DERs) in distribution networks provides a strategic opportunity for the distribution system operator (DSO) to coordinate the assets appropriately and offer services to the transmission systems. The IEEE std. 1547-2018 introduced a control mechanism to enable the power electronic converters (PECs) to offer several services, including voltage regulation by controlling the reactive power injection/absorption; this type of PECs is also known as "smart inverter". The participation of the smart-inverters in the voltage regulation with a novel customer-centred piece of legislation and markets provide the DSO with powerful tools to enforce very positive TSO/DSO interactions. This research paper presents a comprehensive assessment of the steady-state performance provided by voltage control at the smart-inverters to the TSO – DSO system. The assessment includes analysing main indicators using time series considering short term (24-hours, 1-minute resolution) and long-term (one-year) horizon. In this paper, the three leading indicators are used as criteria for the assessment: total energy losses voltage profile in the TSO-DSO system and the power flow interaction at the interface between the systems. The assessment is based on numerical results using the DIgSILENT PowerFactory simulation tool, where the voltage controllers have been implemented, and regional electrical system in south-eastern Norway, the area of Vestfold and Telemark as been used for illustrative purposes

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Section: International Journal Of Electrical and Computer Engineering...mentioning

confidence: 99%

Performance Assessment of TSO–DSO using Volt-Var Control at Smart-Inverters

Astapov

Trashchenkov

González-Longatt

et al. 2022

Int. j. electr. comput. eng. syst. (Online)

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“…However, the operative limits of the synchronous generators and the fact the reactive power control must be locally made to avoid significant energy losses and affect the voltage profile led to introduce dedicated devices to provide reactive power regulation. These devices include synchronous condensers, mechanically switched shunt capacitors/reactors, flexible AC transmission system devices (e.g., thyristor-controlled series capacitor and static VAR compensator), phase-shifting transformers, and transformers equipped with on-load tap changer (OLTC) [2,12]. Although these devices demonstrate effective reactive power injection/absorption when needed and maintain the voltage within its operational limits, the cost of its implementation can result economically ineffective [13].…”

Section: Reactive Power Control Mechanisms At Smart Invertersmentioning

confidence: 99%

“…The load profile and solar PV profile representative of the daily operation, considering 15 min periods, were synthetically generated using the CREST tool [23,24]. The CREST tool was set up to include the temperature and location of the south-eastern area of Norway [2].…”

Section: Test Systemmentioning

confidence: 99%

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Assessment of Daily Cost of Reactive Power Procurement by Smart Inverters

et al. 2021

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The reactive power control mechanisms at the smart inverters will affect the voltage profile, active power losses and the cost of reactive power procurement in a different way. Therefore, this paper presents an assessment of the cost–benefit relationship obtained by enabling nine different reactive power control mechanisms at the smart inverters. The first eight reactive power control mechanisms are available in the literature and include the IEEE 1547−2018 standard requirements. The ninth control mechanism is an optimum reactive power control proposed in this paper. It is formulated to minimise the active power losses of the network and ensure the bus voltages and the reactive power of the smart inverter are within their allowable limits. The Vestfold and Telemark distribution network was implemented in DIgSILENT PowerFactory and used to evaluate the reactive power control mechanisms. The reactive power prices were taken from the default payment rate document of the National Grid. Simulation results demonstrate that the optimal reactive power control mechanism provides the best cost–benefit for the daily steady-state operation of the network.

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“…The reactive power is one main factor in ensuring the voltage remains within safe limits across the whole power system. The voltage-reactive power dependency must carefully be controlled, especially now when the power system is experiencing a fast and exceptional transition to become a zero-carbon industry [1]. The continuously evolving power system is mainly involving the replacement of conventional generation sources by low and zero-carbon energy sources, known as DER.…”

Section: Introductionmentioning

confidence: 99%

Optimal Microgrid–Interactive Reactive Power Management for Day–Ahead Operation

et al. 2021

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The replacement of conventional generation sources by DER creates the need to carefully manage the reactive power maintaining the power system safe operation. The principal trend is to increase the DER volume connected to the distribution network in the coming years. Therefore, the microgrid represents an alternative to offer reactive power management due to excellent controllability features embedded in the DER, which enable effective interaction between the microgrid and the distribution network. This paper proposes a microgrid−iterative reactive power management approach of power-electronic converter based renewable technologies for day-ahead operation. It is designed to be a centralised control based on local measurements, which provides the optimal reactive power dispatch and minimise the total energy losses inside the microgrid and maintain the voltage profile within operational limits. The proposed optimal-centralised control is contrasted against seven local reactive power controls using a techno-economic approach considering the steady−state voltage profile, the energy losses, and the reactive power costs as performance metrics. Three different reactive power pricing are proposed. The numerical results demonstrate the optimal microgrid−interactive reactive power management is the most suitable techno-economic reactive power control for the day−ahead operation.

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TSO-DSO Performance Considering Volt-Var Control at Smart-Inverters: Case of Vestfold and Telemark in Norway

Cited by 14 publications

References 16 publications

Performance Assessment of TSO–DSO using Volt-Var Control at Smart-Inverters

Performance Assessment of TSO–DSO using Volt-Var Control at Smart-Inverters

Assessment of Daily Cost of Reactive Power Procurement by Smart Inverters

Optimal Microgrid–Interactive Reactive Power Management for Day–Ahead Operation

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