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US 11,171,597 B2Granted
Wind-solar hybrid power plant
AssigneeABB Schweiz AG
InventorsJiuping Pan, Peter Steimer
Life of this patent
Estimating the term…
Abstract
Unique systems, methods, techniques and apparatuses of hybrid power plants are disclosed. One exemplary embodiment is a hybrid power plant system including a plurality of hybrid generation units each including an AC collection bus, an AC power source, an AC-AC power converter coupled to the AC power source and AC collection bus, a DC power source, a DC-AC converter coupled to the DC power source and the AC collection bus, an energy storage device, and a power transformer coupled to the AC collection bus and structured to receive AC power from the AC collection bus, step up a voltage of the received AC power, and output medium voltage AC (MVAC) power.
Claims25
A hybrid power plant system comprising:
- a plurality of hybrid generation units each comprising:
- an AC collection bus,
- an AC power source,
- an AC-AC power converter including a first DC-AC converter, the AC-AC power converter being coupled to the AC power source and the AC collection bus, and structured to receive a generated AC power from the AC power source and output a first AC power to the AC collection bus,
- a DC power source,
- a second DC-AC converter coupled to the DC power source and the AC collection bus, and structured to receive DC power from the DC power source and output a second AC power to the AC collection bus,
- an energy storage device, and
- a power transformer coupled to the AC collection bus and structured to receive a combined AC power including the first AC power and the second AC power from the AC collection bus, step up a voltage of the received combined AC power, and output medium voltage AC (MVAC) power;
- a plurality of unit controllers each configured and operable to select an operating mode of a respective one of the plurality of hybrid generation units from among a normal mode, a curtailment mode, and a grid support mode in response to an instruction sent by a plant controller, wherein, in the curtailment mode, each unit controller is configured and operable to charge the energy storage device of its respective hybrid generation unit subject to determination by the unit controller of a readiness of the energy storage device for charging, and in the grid support mode, each unit controller is configured and operable to discharge the energy storage device of its respective hybrid generation unit subject to determination by the unit controller of a readiness of the energy storage device for discharging.
6 more elements
A method for operating a hybrid power plant comprising:
- operating a plurality of hybrid generation units using a plurality of unit controllers, each hybrid generation unit comprising an AC collection bus, an AC-AC power converter coupled to the AC collection bus and including a first DC-AC power converter, a second DC-AC power converter coupled to the AC collection bus, and a power transformer coupled to the AC collection bus;
- receiving, with a plant controller, a dispatch order from a utility grid control system and a set of operational data from each unit controller of the plurality of unit controllers;
- determining, with the plant controller, a plant operation mode using the dispatch orders and the set of operational data;
- generating, with the plant controller, a set of unit controller orders including an active power order, a reactive power order, and the plant operation mode;
- transmitting one unit controller order of the set of unit controller orders to each unit controller of the plurality of unit controllers;
- operating, with each unit controller, the second DC-AC power converter and AC-AC power converter of one hybrid generation unit using the received unit controller order so as to output medium voltage power from each hybrid generation unit;
- receiving, at a grid connection substation, the medium voltage power output by each hybrid generation unit;
- stepping up the received medium voltage power to high voltage power;
- and
- outputting high voltage power to a utility grid;
- selecting, with each unit controller, an operating mode of a respective one of the plurality of hybrid generation units from among a normal mode, a curtailment mode, and a grid support mode;
- and
- controlling, with each unit controller, the respective one of the plurality of hybrid generation units to charge the energy storage device in response to a first communication sent by a plant controller and an evaluation by each unit controller of a readiness of its respective energy storage device for charging in the curtailment mode and to discharge the energy storage device in response to a first communication sent by a plant controller and an evaluation by each unit controller of a readiness of its respective energy storage device for discharging in the grid support mode.
10 more elements
Dependencies are inferred from the claim text.