Hierarchical control of droop-controlled DC and AC microgrids — a general approach towards standardization
Citations
2,621 citations
Cites background from "Hierarchical control of droop-contr..."
...controlling the voltage and frequency of the ac waveforms provided to the microgrid in stand-alone mode [59], [60] and gridsupporting inverters will contribute to guarantee a proper voltage profile along the microgrid extension....
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...Microgrid power converters can competently participate in regulating the grid voltage profile, mainly in LV grids, by means of controlling the active and reactive power delivery through droop control algorithms [47], [60], [70]....
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2,358 citations
Cites background from "Hierarchical control of droop-contr..."
...A hierarchical control scheme is proposed in [50] to improve the flexibility and expansibility of droop-based microgrids....
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...gent performance requirements [50]–[53]....
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...However, the conventional droop control method has several disadvantages [50], [78], [80], [81]: • Poor transient performance or instability issues due to the use of average values of active and reactive power over a cycle....
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1,702 citations
Cites background from "Hierarchical control of droop-contr..."
...This three-level hierarchical control is organized as follows [33]....
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1,234 citations
Cites background from "Hierarchical control of droop-contr..."
...Thus, (3) is not valid for microgrid applications [12], [45]....
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...Block diagram of the secondary and tertiary controls [12]....
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...Then, the error signals are processed by individual controllers as in (52); the resulting signals ( and ) are sent to the primary controller of the DER to compensate for the frequency and voltage deviations [12]...
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...facilitates an economically optimal operation [12], [13]....
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...where , and are the controllers parameters [12]....
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1,131 citations
Cites background or methods from "Hierarchical control of droop-contr..."
...either output power or output current can be selected as the feedback signal in droop control [3], [29]....
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...1) Decentralized control: DCLs do not exist and power lines are used as the only channel of communication....
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...MGs can operate autonomously or be grid-connected, and depending on the type of voltage in the point of common coupling (PCC), ac, and dc MGs can be distinguished [3]....
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...Some of the functionalities that can be accomplished by using DCLs include secondary/tertiary control, real-time optimization, unit commitment, and internal operating mode changing (see Fig....
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...the conventional approach uses a centralized controller which collects information from all units via low-bandwidth DCLs [3], a very active field of research is focused on resolution of these problems via distributed control1 [22], [23]....
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References
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"Hierarchical control of droop-contr..." refers background in this paper
...In addition, the inherent tradeoff of this method between frequency and amplitude regulation in front of active- and reactive-power sharing accuracy cannot be avoided in islanded mode [14]–[19]....
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310 citations
"Hierarchical control of droop-contr..." refers background in this paper
...AC microgrids are now in the cutting edge of the state of the art [20]-[25]....
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257 citations