Smart inverter volt/var control functions for high penetration of PV on distribution systems

Smith, Jeff; Sunderman, Wes; Dugan, R.C.; Seal, Brian

doi:10.1109/psce.2011.5772598

Cited by 239 publications

(145 citation statements)

References 1 publication

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“…According to (2), DG can provide voltage support to raise the LV V 2 at the end of the feeder, but, in case of minimum/no load and high values of R, the magnitude of V 2 can result an overvoltage, limiting the capacity which can be installed, or, in general, the active power that can be injected at the end of the line. As in this study, the PV power generation could not only offset the load, but also cause reverse power flow through the distribution system with operational issues, including overvoltage and loss of voltage regulation.…”

Section: Voltage Regulation Problems In Active Distribution Networkmentioning

confidence: 99%

“…Smart inverter capabilities currently available in commercial inverters are the following [2][3][4]. 1) Set the automatic reduction of the active power generated from the inverter in case of overvoltage (generation curtailment); in this way the inverter will remain connected to the network avoiding continuous connections and disconnections resulting in higher plant energy production reductions.…”

Section: Smart Inverter Capabilitiesmentioning

confidence: 99%

“…Reference [1], for instance, underlined the need to test inverters volt/var controls or other forms of smart voltage regulation, as well as further PV inverters advanced grid support and features of reactive power control, active power control, grid management and dynamic grid support. Papers available in the literature are generally dedicated to computer simulations of the volt/var control methods [2,3] or devoted to review PV inverters smart capabilities such as the capability to sense local conditions of voltage levels, frequency deviations and temperature, or receive commands and signals, which allow them to modify their active and reactive power output [4]. The study presented in this paper, provided with monitoring data of real network parameters, shows how 'smart' features of new inverters can be implemented to increase PV plant integration in existing LV active distribution networks with high PV penetration.…”

Section: Introductionmentioning

confidence: 99%

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Smart inverter operation in distribution networks with high penetration of photovoltaic systems

Ghiani

Pilo

2015

J. Mod. Power Syst. Clean Energy

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With the growing number and capacity of photovoltaic (PV) installations connected to distribution networks, power quality issues related to voltage regulation are becoming relevant problems for power distribution companies and for PV owners. In many countries, like Italy, this has required the revision of the standards concerning the connection to the public distribution network of distributed renewable generation. The new standards require a flexible operation of generation plants that have to be capable to change the active and reactive power dynamically in function of the network parameters (i.e. frequency and network local voltage) in local control or following external commands. Therefore, this paper investigates the use of smart inverter in a critical PV installation, where relevant voltage fluctuations exist. A case study, with real network parameters monitoring data and measurements, is discussed in the paper with the aim of showing how 'smart' features of new inverters can be implemented to increase PV plant integration in low voltage distribution networks.

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Section: Voltage Regulation Problems In Active Distribution Networkmentioning

confidence: 99%

Section: Smart Inverter Capabilitiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Smart inverter operation in distribution networks with high penetration of photovoltaic systems

Ghiani

Pilo

2015

J. Mod. Power Syst. Clean Energy

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“…This is accomplished via either: 1) using excess inverter capacity not utilized for real power generation, or 2) a reduction in real power output to allow reactive power generation. While currently no incentive exists to support the latter activity, the potential systemic benefits are substantial [3].…”

Section: Introductionmentioning

confidence: 99%

“…The authors concluded that using local information alone is sufficient for voltage regulation, but the incorporation of real and reactive power flows improves control system performance. Using a fully decentralized approach, the work of [3] studied the effect of the shape of different inverter volt-var control curves for voltage regulation in high PV penetration scenarios.…”

Section: Introductionmentioning

confidence: 99%

Extremum Seeking control of smart inverters for VAR compensation

Arnold

Negrete-Pincetic

Stewart

et al. 2015

2015 IEEE Power &Amp; Energy Society General Meeting

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Abstract-Reactive power compensation is used by utilities to ensure customer voltages are within pre-defined tolerances and reduce system resistive losses. While much attention has been paid to model-based control algorithms for reactive power support and Volt Var Optimization (VVO), these strategies typically require relatively large communications capabilities and accurate models. In this work, a non-model-based control strategy for smart inverters is considered for VAR compensation. An Extremum Seeking control algorithm is applied to modulate the reactive power output of inverters based on real power information from the feeder substation, without an explicit feeder model. Simulation results using utility demand information confirm the ability of the control algorithm to inject VARs to minimize feeder head real power consumption. In addition, we show that the algorithm is capable of improving feeder voltage profiles and reducing reactive power supplied by the distribution substation.

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Optimal coordination of PV smart inverter and traditional volt‐VAR control devices for energy cost savings and voltage regulation

Pamshetti

Singh

2019

Int Trans Electr Energ Syst

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Summary Traditional volt‐VAR control (VVC) devices such as on‐load tap changers (OLTC), voltage regulators (VRs), and shunt capacitor banks (SCBs) may not be capable to handle the sudden voltage violations because of slow response and large delay time. The voltage fluctuations may result from various disturbances such as intermittence in power output from distributed energy sources (DERs) such as photovoltaic (PV) and wind generation, change in network configuration, and load demand (especially in the case of flexible loads). Hence, there is a need of fast‐acting voltage regulation device such as smart inverter along with traditional VVC devices to encounter these issues. However, without proper coordination, these devices may cause a detrimental impact on distribution operations and network assets. In order to resolve this issue, a hierarchical coordinated volt‐VAR optimization (VVO) methodology has been introduced in this paper. In the proposed methodology, centralized as well as local control algorithm has been considered. The VVO objective of present study is to minimize the total operating cost considering conservation voltage reduction (CVR) and voltage deviation at all nodes simultaneously. Besides, the impact of battery energy storage (BES) on total operating cost, voltage deviation, and CVR has been examined. The ϵ‐constraint method and fuzzy decision‐making method have been employed for the solution of the abovementioned multi‐objective optimization problem. The performance of the proposed scheme has also been verified considering the forecast errors in PV generation and load demand. The proposed VVO methodology has been validated on a well‐known 33‐bus distribution systems. The test results demonstrate the significance of the proposed scheme on minimization of energy consumption, losses, OLTC switching operations, and voltage deviation.

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Smart inverter volt/var control functions for high penetration of PV on distribution systems

Cited by 239 publications

References 1 publication

Smart inverter operation in distribution networks with high penetration of photovoltaic systems

Smart inverter operation in distribution networks with high penetration of photovoltaic systems

Extremum Seeking control of smart inverters for VAR compensation

Optimal coordination of PV smart inverter and traditional volt‐VAR control devices for energy cost savings and voltage regulation

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