Online volt/var control in a smart grid with multiple distributed generation systems

Raghavendra, Prakash S.; Gaonkar, D. N.

doi:10.1109/poweri.2016.8077407

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…Voltage sensitivity coefficients for nodal active and reactive infusions are represented by derivates ( 16) and (17). Expression ( 15) can be expressed in matrix form by considering the n equations.…”

Section: Direct Voltage Sensitivity Analysismentioning

confidence: 99%

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Voltage Profile Analysis in Smart Grids Using Online Estimation Algorithm

Raghavendra¹,

Nuvvula²,

Kumar³

et al. 2022

Journal of Electrical and Computer Engineering

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Voltage rise is the main obstacle to prevent the increase of distributed generators (DGs) in low-voltage (LV) distribution grids. In order to maintain the power quality and voltage levels within the tolerance limit, new measurement techniques and intelligent devices along with digital communications should be used for better utilization of the distribution grid. This paper presents a real-time sensor-based online voltage profile estimation technique and coordinated Volt/VAR control in smart grids with distributed generator interconnection. An algorithm is developed for voltage profile estimation using real-time sensor remote terminal unit (RTU) which takes into account topological characteristics, such as radial structure and high R/X ratio, of the smart distribution grid with DG systems. A coordinated operation of multiple generators with on-load tap changing (OLTC) transformer for Volt/VAR control in smart grids has been presented. Direct voltage sensitivity analysis is used to select a single DG system for reactive power support in multi-DG environment. The on-load tap changing transformer is employed for voltage regulation when generators’ reactive power contributions are not enough to regulate the voltages. Simulation results show that the reported method is capable of maintaining voltage levels within the tolerance limit by coordinated operation of DG systems and on-load tap changing transformer.

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Section: Direct Voltage Sensitivity Analysismentioning

confidence: 99%

“…e fundamental idea behind coordinated control approach is to coordinate the operation of the DG sources and voltage regulating devices such as on-load tap changing transformer and capacitor [13][14][15][16][17]. In [13], coordinated and uncoordinated control scheme with and without considering the DG in voltage control was investigated.…”

Section: Introductionmentioning

confidence: 99%