System and method for controlling microgrid
A system for controlling a microgrid includes microgrid assets and a tieline for coupling the microgrid to a bulk grid; and a tieline controller coupled to the tieline. At least one of the microgrid assets comprises a different type of asset than another one of the microgrid assets. The tieline controller is configured for providing tieline control signals to adjust active and reactive power in respective microgrid assets in response to commands from the bulk grid operating entity, microgrid system conditions, bulk grid conditions, or combinations thereof.
1. A system for controlling a microgrid, the system comprising:
microgrid assets, at least one of the microgrid assets comprising a different type of electrical generator than an electrical generator of another one of the microgrid assets;
a tieline for coupling the microgrid to a bulk grid; and
a tieline controller coupled to the tieline and configured for providing tieline control signals to adjust active and reactive power in respective microgrid assets in response to commands from the bulk grid operating entity, microgrid system conditions and bulk grid conditions,
wherein the tieline controller comprises an active power controller configured for generating a plurality of prioritized ΔP control signals, wherein at least one of the plurality of prioritized ΔP control signals corresponds to a power limit, a ramp rate, a ramp rate limit, or a frequency.
2. The system of claim 1 wherein the microgrid assets further comprise loads.
3. The system of claim 1 wherein the microgrid assets further comprise at least one storage or network component.
4. The system of claim 1 wherein the electrical generators comprise at least one renewable energy source.
5. The system of claim 4 wherein the electrical generators comprise two different types of renewable energy sources.
6. The system of claim 1 wherein the microgrid assets further comprise at least one thermal load or storage component.
7. The system of claim 1 wherein the tieline controller further comprises:
a pre-processing unit configured for receiving input signals and configured for generating pre-processed control signals based on the input signals, wherein the input signals comprise internal input signals received from individual assets from the microgrid assets and external input signals received from the bulk grid, a bulk grid operating entity, or combinations thereof.
8. The system of claim 7 wherein active power controller is configured for receiving the pre-processed control signals for use in generating the plurality of prioritized ΔP control signals.
9. The system of claim 8 wherein the tieline controller further comprises:
a reactive power regulator configured for generating a plurality of ΔQ control signals, wherein at least one of the plurality of ΔQ control signals corresponds to a reactive power regulation, a voltage regulation, or a power factor regulation.
10. The system of claim 1 wherein the tieline controller is configured to regulate voltage at a point of interconnection.
11. The system of claim 1 wherein the tieline controller is configured to regulate bulk grid frequency.
12. The system of claim 1 wherein the tieline controller is configured to issue a total active power command signal to the microgrid based on maximum available power from each individual asset from the microgrid assets.
13. A method of controlling a microgrid, the method comprising:
receiving a plurality of input signals, wherein the plurality of input signals comprise a plurality of internal input signals received from individual assets from microgrid assets and a plurality of external input signals received from the bulk grid, a bulk grid operating entity, or combinations thereof, wherein at least one of the microgrid assets comprises an electrical generator of a different type than an electrical generator of another one of the microgrid assets; and
providing tieline control signals to adjust active and reactive power in respective microgrid assets in response to commands from the bulk grid operating entity, microgrid system conditions and bulk grid conditions,
wherein providing tieline control signals to adjust active power comprises generating a plurality of prioritized ΔP control signals, wherein at least one of the plurality of prioritized ΔP control signals corresponds to a power limit, a ramp rate, a ramp rate limit, or a frequency.
14. The method of claim 13 wherein providing tieline control signals comprises generating pre-processed control signals based on the plurality of input signals.
15. The method of claim 14 wherein providing tieline control signals further comprises generating a plurality of ΔQ control signals, wherein at least one of the plurality of ΔQ control signals corresponds to a reactive power regulation, a voltage regulation, a power factor regulation or a combination thereof.
16. The method of claim 13 wherein the tieline controller is configured to regulate voltage at a point of interconnection.
17. The method of claim 13 wherein the tieline controller is configured to regulate bulk grid frequency.
18. The system of claim 13 wherein the tieline controller is configured to issue a total active power command signal to the microgrid based on maximum available power from each individual asset from the microgrid assets.
19. A system for controlling a microgrid, the system comprising:
microgrid assets, at least one of the microgrid assets comprising a different type of electrical generator than an electrical generator of another one of the microgrid assets;
a tieline for coupling the microgrid to a bulk grid; and
a tieline controller coupled to the tieline and configured for providing tieline control signals to adjust active and reactive power in respective microgrid assets in response to commands from the bulk grid operating entity, microgrid system conditions, and bulk grid conditions, wherein the tieline controller comprises:
an active power controller configured for generating a plurality of prioritized ΔP control signals, wherein at least one of the plurality of prioritized ΔP control signals corresponds to a power limit, a ramp rate, a ramp rate limit, or a frequency,
a reactive power regulator configured for generating a plurality of ΔQ control signals, wherein at least one of the plurality of ΔQ control signals corresponds to a reactive power regulation, a voltage regulation, or a power factor regulation, and
a dispatch reference selection function for using a participation factor of individual ones of the microgrid assets to provide individual adjustment factors for the microgrid assets for use in generating the tieline control signals.