Dynamic interactions between distribution network voltage regulators for large and distributed PV plants

Ravindra, Harsha; Faruque, M. Omar; Schoder, Karl; Steurer, M.; McLaren, P.G.; Meeker, Rick

doi:10.1109/tdc.2012.6281599

Cited by 22 publications

(19 citation statements)

References 5 publications

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“…Integrating (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18) for one half cycle and setting it equal to the expression for energy stored in a capacitor, rearranging the result, the equation to size the input capacitor is expressed as:…”

Section: Link Capacitormentioning

confidence: 99%

“…For large PV systems the voltage ripple needs to be small so the corresponding power ripple as represented in Figure 3.21 is minimal. A ripple tolerance of 1.5% was chosen, plugging in the correct values for the system of interest into (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19), and rounding to a typical value the DC link capacitor was sized to be 20 mF.…”

Section: Link Capacitormentioning

confidence: 99%

“…However, the real and reactive power equations (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) and (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21) are coupled, meaning an increase in delta is not a pure change in real power but also results in a slight change in the reactive power as well. The same is true for a change in ma and how it slightly affects the real power and not purely just the reactive power.…”

Section: Voltage Regulationmentioning

confidence: 99%

“…Simple Two-Port NetworkThe equation(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) assumes the equivalent system impedance has a high reactance to resistance ratio. This assumption is valid for the system of interest because the power flow equation is being applied across the grid-coupling transformer and a natural characteristic of transformers is to have very high X/R ratios.…”

mentioning

confidence: 99%

“…This assumption is valid for the system of interest because the power flow equation is being applied across the grid-coupling transformer and a natural characteristic of transformers is to have very high X/R ratios. Analyzing the variables in(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20), the reactance X 12 is a fixed parameter and does not change. V 2 is the grid voltage…”

mentioning

confidence: 99%

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Modeling and Analysis of a PV Grid-Tied Smart Inverter's Support Functions

Johnson¹

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Modeling and Analysis of a PV Grid-Tied Smart Inverter's Support Functions Benjamin Anders Johnson The general trends in the past decade of increasing solar cell efficiency, decreasing PV system costs, increasing government incentive programs, and several other factors have all combined synergistically to reduce the barriers of entry for PV systems to enter the market and expand their contribution to the global energy portfolio. The shortcomings of current inverter functions which link PV systems to the utility network are becoming transparent as PV penetration levels continue to increase. The solution this thesis proposes is an approach to control the inverters real and reactive power output to help eliminate the problems associated with PV systems at their origin and in addition provide the grid with ancillary support services. The design, modeling, and analysis of a grid-tied PV system was performed in the PSCAD software simulation environment. Results indicate that in the presence of grid disturbances the smart inverter can react dynamically to help restore the power system back to its normal state. A harmonic analysis was also performed indicating the inverter under study met the applicable power quality standards for distributed energy resources.

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