2011
DOI: 10.1109/tpel.2011.2136439
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Impedance-Based Stability Criterion for Grid-Connected Inverters

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Cited by 1,874 publications
(888 citation statements)
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“…As discussed in Section 4, the renewable energy systems have to be able to operate both in grid-feeding and grid-forming modes [23,24,99]. In grid-feeding mode [23], the system is stable at all the operating points of the PV generator, if the associated converters are properly designed as shown in Figure 18.…”
Section: Stability Issuesmentioning
confidence: 99%
“…As discussed in Section 4, the renewable energy systems have to be able to operate both in grid-feeding and grid-forming modes [23,24,99]. In grid-feeding mode [23], the system is stable at all the operating points of the PV generator, if the associated converters are properly designed as shown in Figure 18.…”
Section: Stability Issuesmentioning
confidence: 99%
“…To guarantee robustness to grid impedance variation, the grid-connected converter should satisfy the following criteria [4,27,28]: (1) The current control is stable when Z ' g(s) = 0; and (2) The impedance ratio Z ' g(s)/Zcon(s) satisfies the Nyquist criterion. That is, if the gains of Zcon(s) and Z ' g(s) intersect at the frequency fcross, the phase margin at fcross (PMcross) must be positive, i.e., PMcross > 0°, and as large as possible.…”
Section: Impedance-based Stability Analysis Under Weak Grid Conditionsmentioning
confidence: 99%
“…The impedance method has been widely used in grid-connected systems. The impedance of a grid-connected voltage-source converter is critical to any analysis of the stability and resonance between the converter and the grid, including that with the filter of the converter [34]. Particularly, a grid-connected voltage-source converter can be modeled as a current source in parallel with an impedance [35], and the stability of the system is determined by the magnitude of the impedance that can be improved by increasing the output impedance at the harmonic frequencies [36].…”
Section: Controlled Source Electrical Equipmentmentioning
confidence: 99%