US 2024/0405556 A1Published application

Coordination and control of controllable energy resources in an electric network to maintain continuous supply and demand balance

AssigneePXiSE Energy Solutions, LLC

InventorsCharles H. Wells, Raymond A. de Callafon, Patrick T. Lee

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Abstract

To enable reliable transition of an electric grid towards a low or no inertia state, implementations provide a system and/or a method to control the flow of real and reactive power in an electric grid that includes a heterogenous mix of distributed energy resources (DERs). The control of the flow of real and reactive power is to maintain continuous balance between electric supply and demand in an alternating current (AC) electric network. The heterogeneous mix of DERs can include multiple DERs, two or more of which are different types relative to one another. Types of DERs can include, for example, dispatchable thermal generators, renewable energy resources, and/or battery energy storage systems with inverters. Moreover, one or more of the DERs and their inverters can be configured to operate as either a voltage source (Grid Forming, GFM) or a current source (Grid Following, GFL) inside the AC electric network.

Claims23

Dependent claims

A method, comprising:

controlling a supply-demand balance of power, in a multi-phase AC electric power system, via power flow dispatch to multiple grid-forming (GFM) inverters and grid-following resources operating in parallel in the multi-phase AC electric power system, wherein controlling the supply-demand balance comprises:
iteratively generating, based on a corresponding real power setpoint and a corresponding reactive power setpoint:
a corresponding first GFM inverter voltage setpoint and a corresponding first GFM inverter frequency setpoint for a first GFM inverter of the GFM inverters, and
a corresponding second GFM inverter voltage setpoint and a corresponding second GFM inverter frequency setpoint for a second GFM inverter of the GFM inverters,
iteratively providing the corresponding first GFM inverter voltage setpoint and the corresponding first GFM inverter frequency setpoint to the first GFM inverter to cause control of the first GFM inverter based on the corresponding first GFM inverter voltage setpoints and the corresponding first GFM inverter frequency setpoints,
iteratively providing the corresponding second GFM inverter voltage setpoint and the corresponding second GFM inverter frequency setpoint to the second GFM inverter to cause control of the second GFM inverter based on the corresponding second GFM inverter voltage setpoints and the corresponding second GFM inverter frequency setpoints,
wherein the corresponding first GFM inverter frequency setpoints, provided to cause control of the first GFM inverter, at least partially differ from the corresponding second GFM inverter frequency setpoints provided to cause control of the second GFM inverter, and
iteratively providing the corresponding real power setpoints and corresponding reactive power setpoints to the grid-following resources.

5 more elements

A system comprising:

one or more processors operable to execute stored instructions to control a supply-demand balance of power, in a multi-phase AC electric power system, via power flow dispatch to multiple grid-forming (GFM) inverters and grid-following resources operating in parallel in the multi-phase AC electric power system, wherein in controlling the supply-demand balance one or more of the processors are to:
iteratively generate, based on a corresponding real power setpoint and a corresponding reactive power setpoint:
a corresponding first GFM inverter voltage setpoint and a corresponding first GFM inverter frequency setpoint for a first GFM inverter of the GFM inverters, and
a corresponding second GFM inverter voltage setpoint and a corresponding second GFM inverter frequency setpoint for a second GFM inverter of the GFM inverters,
iteratively provide the corresponding first GFM inverter voltage setpoint and the corresponding first GFM inverter frequency setpoint to the first GFM inverter to cause control of the first GFM inverter based on the corresponding first GFM inverter voltage setpoints and the corresponding first GFM inverter frequency setpoints,
iteratively provide the corresponding second GFM inverter voltage setpoint and the corresponding second GFM inverter frequency setpoint to the second GFM inverter to cause control of the second GFM inverter based on the corresponding second GFM inverter voltage setpoints and the corresponding second GFM inverter frequency setpoints,
wherein the corresponding first GFM inverter frequency setpoints, provided to cause control of the first GFM inverter, at least partially differ from the corresponding second GFM inverter frequency setpoints provided to cause control of the second GFM inverter, and
iteratively provide the corresponding real power setpoints and corresponding reactive power setpoints to the grid-following resources.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/627,284Filed 4 Apr 2024
Priority: 5 Jun 2023
Published: 5 Dec 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H02J 3/28
Circuit arrangements for AC mains or AC distribution networks: arrangements for balancing of the load in networks by storage of energy
H02J 3/0014
Arrangements for handling faults or abnormalities, e.g. emergencies or contingencies: for preventing or reducing power oscillations in networks
H02J 3/16
Arrangements for adjusting voltage in AC networks by changing a characteristic of the network load: by adjustment of reactive power
H02J 3/32
Arrangements for balancing of the load in networks by storage of energy: using batteries or super capacitors with converting means

Family

Application63/471,201Us provisional application · filed 5 Jun 2023
Application63/471,204Us provisional application · filed 5 Jun 2023
US 2024/0405556 A1This patent

From the US filing history. Foreign family members aren’t listed.

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