Consensus-based distributed cooperative control for microgrid voltage regulation and reactive power sharing
AssigneeNEC Corporation
InventorsDawei He, Ratnesh Sharma, Di Shi
Life of this patent
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Abstract
A controller used in microgrid systems that includes a primary control module and a secondary control module. The primary control module may employ a primary consensus control to control at least one of a real power and reactive power sharing in at least one distributed generator system of a microgrid. The secondary control module may employ a secondary consensus control to maintain at least one of voltage and frequency in the microgrid to a nominal value.
Claims19
A controller used in microgrid systems comprising:
- a primary control module configured to employ a primary consensus control including at least one hardware processor to control at least one of a real power and reactive power sharing in at least one distributed generator of a microgrid, wherein the primary consensus control exchanges reactive power information between each neighboring distributed generator in the microgrid so that said each distributed generator has a proportion of total power in the microgrid;
- wherein the primary consensus control comprises a control algorithm:
- where {dot over (V)}i is a magnitude of output voltage for an ith distributed generator, Ni is neighboring buses of bus i, Qj reactive power output at a jth distributed generator, Qi reactive power output at an ith distributed generator, Dq,i is the multiplicative inverse of the reactive power droop coefficient for the ith distributed generator, and Dq,j is the multiplicative inverse of the reactive power droop coefficient for the jth distributed generator;
- and
- a secondary control module configured to employ a secondary consensus control to maintain at least one of voltage and frequency in the microgrid to a nominal value.
A method for controlling a microgrid system comprising:
- controlling at least one of real power and reactive power amongst distributed generators of a microgrid using a primary consensus control employing at least one hardware processor to exchange reactive power information between each neighboring distributed generator of the microgrid so that each distributed generator has a proportion of total power in the microgrid;
- wherein the primary consensus control comprises a control algorithm:
- where {dot over (V)}i is a magnitude of output voltage for an ith distributed generator, Ni is neighboring buses of bus i, Qj reactive power output at a jth distributed generator, Qi reactive power output at an ith distributed generator, Dq,i is the multiplicative inverse of the reactive power droop coefficient for the ith distributed generator, and Dq,j is the multiplicative inverse of the reactive power droop coefficient for the jth distributed generator;
- and
- maintaining a nominal value of at least one of voltage and frequency in the microgrid using a secondary consensus control.
A computer program product is provided that includes a non-transitory computer readable storage medium having computer readable program code embodied therein for a method of controlling a microgrid system, the method comprising:
- controlling at least one of real power and reactive power amongst distributed generators of a microgrid using a primary consensus control employing at least one hardware processor to exchange reactive power information between each neighboring distributed generator of microgrid so that each distributed generator has a proportion of total power in the microgrid;
- wherein the primary consensus control comprises a control algorithm:
- where {dot over (V)}i is a magnitude of output voltage for an ith distributed generator, Ni is neighboring buses of bus i, Qj reactive power output at a jth distributed generator, Qi reactive power output at an ith distributed generator, Dq,i is the multiplicative inverse of the reactive power droop coefficient for the ith distributed generator, and Dq,j is the multiplicative inverse of the reactive power droop coefficient for the jth distributed generator;
- and
- maintaining a nominal value of at least one of voltage and frequency in the microgrid using a secondary consensus control.
Dependencies are inferred from the claim text.