Multi‐mode adaptive local reactive power control method based on PV inverters in low voltage distribution networks

Cai, Yici; Tang, Wei; Li, Li; Zhang, Bo; Zhang, Lu; Wang, Yue

doi:10.1049/iet-gtd.2018.6955

Cited by 15 publications

(7 citation statements)

References 22 publications

(33 reference statements)

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“…The reactive power application methodology to mitigate voltage instabilities seems more efficient and cost-effective [9]. It is also emphasized that these methods are especially efficient for the distribution lines connected with many PV power plants [10][11][12][13][14][15][16][17][18][19][20]. The capacitive reactive power is generated through the capacitance-producing devices serially or shunt connected to a load [11].…”

Section: Introductionmentioning

confidence: 99%

“…A significant amount of studies was devoted to the methods to produce reactive power, such as DSTATCOMs [12,13], STATCOM [4,10,14], and real electrical capacitors [15]. Many innovative control techniques and algorithms have also been proposed to control reactive power flow [16][17][18][19][20]. It is found that the source current enhances significantly during the capacitive power application [2], which restricts the time duration to apply this method.…”

Section: Introductionmentioning

confidence: 99%

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Reactive Power Compensation for Preventing Voltage Instabilities in Distribution Lines Enriched with PV Power Plants

Averbukh¹,

Rajput²,

Amiel³

et al. 2022

REPQJ

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The efficient voltage regulation method by capacitive reactive power usage is represented in the article. The stochastic electricity generation of multiple PV stations placed in local distribution lines induces voltage instabilities. These voltage fluctuations may overcome the allowable limits and cause technical problems and economic losses. The method of applying reactive power generated by a capacitor bank at the load is proposed. Primarily, a strict analytical solution of nonlinear equations describing voltage deviations in the distribution line connected with photovoltaic systems was obtained. The control system can fast select optimal capacitors based on the analytical solution and then connect them smoothly to a load. The developed experimental setup verified and approved the correctness and accuracy of theoretical analysis. Experimental measurements confirmed the proposed method’s ability to improve voltage stability in distribution grids. The proposed method is supposed to be used together with the transformer tap-changers in electrical substations. The capacitive power is applied in a time of inappropriate voltage deviations only and is disconnected as the tapchanger corrected the transformation ratio.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reactive Power Compensation for Preventing Voltage Instabilities in Distribution Lines Enriched with PV Power Plants

Averbukh¹,

Rajput²,

Amiel³

et al. 2022

REPQJ

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show abstract

“…Traditional power quality control equipment, such as shunt capacitors and phase change switches, cannot operate frequently and have limited control ability [4]. Static var generator (SVG), PV inverter [5] and other power electronics devices have flexible power regulation ability, which can mitigate the over‐voltage and three‐phase unbalance problems of LVDNs. However, these devices cannot break the bottleneck of radial operation of distribution networks.…”

Section: Introductionmentioning

confidence: 99%

Voltage control method based on three‐phase four‐wire sensitivity for hybrid AC/DC low‐voltage distribution networks with high‐penetration PVs

Zhang

Zhao

Zhang

et al. 2021

IET Renewable Power Gen

Self Cite

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The increasing integration of distributed photovoltaics may further aggravate the over‐voltage and three‐phase unbalance issues of low‐voltage distribution networks with three‐phase four‐wire structures. The voltage control method based on the AC and DC side power flow control and the three‐phase power control capability of voltage source converter in hybrid AC/DC low‐voltage distribution networks is a solution for the improvement of the above power quality issues. In this paper, an accurately improved sensitivity matrix calculation method considering shunt admittance based on the ABCD parameters is proposed in hybrid AC/DC low‐voltage distribution networks with a three‐phase four‐wire structure. The presented ABCD parameters of the feeders consider the influence of the coupling effect among phases and the neutral line on sensitivity calculation, which makes the sensitivity calculation simple. Then, a power‐voltage control method for voltage source converters based on three‐phase four‐wire sensitivity matrices of the AC side is proposed considering the constraints from the voltage source converter and DC side power flow in hybrid AC/DC low‐voltage distribution networks, which can effectively address the over‐voltage and unbalanced issues. Simulations are performed to verify the proposed sensitivity calculation method and voltage control method.

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“…The authors of [12,13] presented an optimized decentralized control approach for each PV inverter based on voltage sensitivity analysis by implementing the control action at the point of common coupling (PCC) [14] as one of ancillary services to the ADN. A multi-mode adaptive local reactive power control method based on Q(P) characteristics is discussed in [15] considering control parameter optimization. Reference [16] proposed a combination of centralized-remote control and local-decentralized control to ensure that the nodal voltages remain within regulatory limits.…”

Section: Introductionmentioning

confidence: 99%

A Decoupling Rolling Multi-Period Power and Voltage Optimization Strategy in Active Distribution Networks

Shen

Zheng

et al. 2020

Energies

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With the increasing penetration of distributed photovoltaics (PVs) in active distribution networks (ADNs), the risk of voltage violations caused by PV uncertainties is significantly exacerbated. Since the conventional voltage regulation strategy is limited by its discrete devices and delay, ADN operators allow PVs to participate in voltage optimization by controlling their power outputs and cooperating with traditional regulation devices. This paper proposes a decoupling rolling multi-period reactive power and voltage optimization strategy considering the strong time coupling between different devices. The mixed-integer voltage optimization model is first decomposed into a long-period master problem for on-load tap changer (OLTC) and multiple short-period subproblems for PV power by Benders decomposition algorithm. Then, based on the high-precision PV and load forecasts, the model predictive control (MPC) method is utilized to modify the independent subproblems into a series of subproblems that roll with the time window, achieving a smooth transition from the current state to the ideal state. The estimated voltage variation in the prediction horizon of MPC is calculated by a simplified discrete equation for OLTC tap and a linearized sensitivity matrix between power and voltage for fast computation. The feasibility of the proposed optimization strategy is demonstrated by performing simulations on a distribution test system.

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Multi‐mode adaptive local reactive power control method based on PV inverters in low voltage distribution networks

Cited by 15 publications

References 22 publications

Reactive Power Compensation for Preventing Voltage Instabilities in Distribution Lines Enriched with PV Power Plants

Reactive Power Compensation for Preventing Voltage Instabilities in Distribution Lines Enriched with PV Power Plants

Voltage control method based on three‐phase four‐wire sensitivity for hybrid AC/DC low‐voltage distribution networks with high‐penetration PVs

A Decoupling Rolling Multi-Period Power and Voltage Optimization Strategy in Active Distribution Networks

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