Voltage control of critical and non-critical loads in distribution networks with electric spring

Askarpour, Mohammad; Aghaei, Jamshid; Khooban, Mohammad Hassan; Shafie‐khah, Miadreza; Catalão, João P.S.

doi:10.1016/j.epsr.2019.105988

Cited by 16 publications

(9 citation statements)

References 31 publications

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“…Further to (8), NCL is supplied also under grid undervoltage, thus satisfying the mandate declared in Section III. By (7) and ( 8), the NCL current takes the normalized minimum value of…”

Section: A C Es Sizingmentioning

confidence: 89%

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Sizing Procedure of Reactive Electric Spring

Buja

Castellan

Wang

2022

IEEE Open J. Ind. Electron. Soc.

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Reactive electric spring (RES) is a technique aimed at stabilizing the user voltage in presence of grid voltage variations by means of a user-encapsulated circuit. In spite of the numerous papers on the matter, no expressions are still available to size the RES elements. This paper fills this lack, by drawing up a sizing procedure of them. The procedure starts with a targeted investigation of the RES operation and exploits the outcomes to provide expressions for the values of the passive elements as well as for the voltage-current ratings of the voltage source inverter (VSI). The sizing expressions are formulated in normalized form to emphasize their dependence on the parameters of the user non-critical load. Focus of the sizing procedure is on the two RES key-elements, namely the AC-side capacitor and VSI but the AC filter inductor and the DC-side capacitor are also sized. Two options for sizing the AC-side capacitor are also discussed. At last, the study case of a user supplied by a low-voltage distribution line is considered and the sizing expressions are utilized to calculate the RES data. Experimental results, obtained by an on-purpose arranged hardwarein-the-loop (HIL) rig, validate the sizing procedure.

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“…Further to (8), NCL is supplied also under grid undervoltage, thus satisfying the mandate declared in Section III. By (7) and ( 8), the NCL current takes the normalized minimum value of…”

Section: A C Es Sizingmentioning

confidence: 89%

“…ES comes in two basic versions: passive and active [8], [9]. In the passive version, like that one shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Sizing Procedure of Reactive Electric Spring

Buja

Castellan

Wang

2022

IEEE Open J. Ind. Electron. Soc.

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“…In formula (5),   represents the latest data value;  represents the initial data value;  is a random variable, taking values between 0 and 1; n indicates time. Bring the communication link data into the Kalman filter estimation equation to obtain the state estimation value at the sampling time, which can be expressed as:…”

Section: Estimating Distributed Power Statusmentioning

confidence: 99%

“…In addition, the increase of permeability of new energy and the increase of the proportion of nonlinear and impact loads put forward higher requirements for the related technologies to ensure the reliability of power supply and improve power quality [3][4] . Large-scale grid integration of new energy generation will profoundly change the dispatching control pattern of the main network [5] . Therefore, this paper proposes a dynamic control method of distributed power supply in the distribution network under 5G network to coordinate distribution network layout and capacity allocation with regional planning.…”

Section: Introductionmentioning

confidence: 99%

Dynamic regulation method of distributed generation in distribution network under 5G network

Chen

Li²,

Bai

et al. 2022

J. Phys.: Conf. Ser.

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Aiming at the problem of uneven power flow distribution caused by distributed power supply access, which leads to high voltage deviation and active network loss, a dynamic control method of distributed power supply in 5G network is proposed. The distributed topology structure of the distribution network under 5G network is generated, and the static topology information is extracted to establish the power partition. The distribution network in each area is connected to its own bus through different feeders. The distribution network reconstruction period is divided in the partition, and the network reconstruction period and the corresponding switch action scheme are determined. The state of distributed power supply was estimated according to reconstruction period and active/reactive power balance index, and the stability of dynamic control was determined. Based on the stability control, the dynamic control model of distributed power supply is established, and the network voltage can reach the preset target by adjusting the power of power switch. The simulation results show that the average voltage deviation of the proposed control method is 1.976, which is 4.431 and 3.783 lower than those based on data drive and flexible load regulation, respectively. The active power network loss of the control method in this paper is 0.342 MW, which is 0.385 MW and 0.346 MW lower than that of the control method based on data drive and flexible load regulation, respectively. Therefore, this method can improve the absorption capacity of distributed power supply and promote the power flow reciprocity of distribution network.

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“…The capacitors banks need to get charged periodically by battery or any DC source. For active power compensation a DC source is needed to absorb and inject active power [35]. The controller of the ES in Fig.…”

Section: Electric Springs For Voltage Regulationmentioning

confidence: 99%