阅读说明：本技术 燃气涡轮-能量储存混合系统设计 (Gas turbine-energy storage hybrid system design ) 是由 S·张 于 2018-12-27 设计创作，主要内容包括：一种混合电力系统,其包括：至少一个第一隔离变压器,其输入被配置为能够连接到电源的输出；能量储存系统,其具有至少一个能量储存装置以及具有连接到所述至少一个能量储存装置的至少一个DC至AC转换器的电力转换系统；以及至少一个第二隔离变压器,其被配置成输入连接到所述储存系统的输出的升压隔离变压器。(A hybrid power system, comprising: at least one first isolation transformer having an input configured to be connectable to an output of a power supply; an energy storage system having at least one energy storage device and a power conversion system having at least one DC to AC converter connected to the at least one energy storage device; and at least one second isolation transformer configured to input a boost isolation transformer connected to an output of the storage system.)

1. A hybrid power system, comprising:

at least one first isolation transformer, an input of the at least one first isolation transformer configured to be connectable to an output of a power supply;

an energy storage system having at least one energy storage device and a power conversion system having at least one DC to AC converter connected to the at least one energy storage device; and

at least one second isolation transformer configured to input a boost isolation transformer connected to an output of the storage system.

2. The hybrid power system as claimed in claim 1, comprising:

a power supply for generating AC power.

3. The hybrid power system of claim 2, wherein the power source is a gas turbine generator.

4. The hybrid power system of claim 3, wherein the power source comprises:

a plurality of gas turbine generators connected in parallel.

5. The hybrid power system of claim 4, wherein the at least one first isolation transformer comprises:

a plurality of isolation transformers, each isolation transformer of the plurality of isolation transformers connected to one of the plurality of gas turbine generators.

6. The hybrid power system of claim 1, wherein the energy storage system comprises:

a plurality of energy storage devices, each of the plurality of energy storage devices comprising at least one battery module.

7. The hybrid power system of claim 6, wherein the at least one second isolation transformer comprises:

a plurality of isolated step-up transformers, each of the plurality of isolated step-up transformers connected to one of a plurality of DC to AC converters of the storage system.

8. The hybrid power system of claim 1, comprising:

an output node for connecting the output of the first isolation transformer and the parallel boost output of the second isolation transformer.

9. The hybrid power system of claim 8, wherein the output node is a connection for providing power of the hybrid power system to a load.

10. The hybrid power system of claim 8, wherein the output node is a utility grid.

11. The hybrid power system as claimed in claim 8, the hybrid power system comprising:

a power feeder protection switch and a meter connected in series between the output of the at least one first isolation transformer and the output node.

12. The hybrid power system as claimed in claim 8, the hybrid power system comprising:

an energy storage feed line protection switch connected in series between the output of the at least one isolation step-up transformer and the output node.

13. The hybrid power system as claimed in claim 8, the hybrid power system comprising:

a site protection switch and a site meter connected to an output at the output node.

14. The hybrid power system of claim 2, comprising:

a control unit for controlling the power source and the output of the energy storage system.

15. A method for providing power, the method comprising the steps of:

generating AC power via an AC power source;

providing the power to an output node via at least a first isolation transformer;

storing energy as a DC voltage in an energy storage system;

providing power to the output node from the energy storage system via a DC-to-AC converter and a boost isolation transformer, the energy storage system, the DC-to-AC converter and the boost isolation transformer being connected to the output node in parallel with the AC power source and the first isolation transformer; and

controlling the AC power source and the energy storage system to regulate power provided to the output node.

16. The method for providing power of claim 15, wherein the output node is connected to a utility grid.

17. A control unit for controlling a hybrid power system, the control unit comprising:

a communication interface;

at least one processor; and

at least one memory including computer program code;

the at least one memory and the computer program code configured to, with the at least one processor, cause the control unit to:

generating AC power via an AC power source;

providing the power to an output node via at least a first isolation transformer;

storing energy as a DC voltage in an energy storage system;

providing power to the output node from the energy storage system via a DC-to-AC converter and a boost isolation transformer, the energy storage system, the DC-to-AC converter and the boost isolation transformer being connected to the output node in parallel with the AC power source and the first isolation transformer; and

controlling the AC power source and the energy storage system to regulate power provided to the output node.

Technical Field

The present disclosure relates to energy generation and storage systems.

Background

Energy generation and storage systems are known. For example, U.S. patent publication No.2017/0331298 (the contents of which are incorporated herein by reference in their entirety) discloses various embodiments, including systems and methods of operating a hybrid energy system that includes a gas turbine generator configured to provide a fully loaded electrical output and a storage device configured to store energy. The hybrid energy system includes a generator step-up transformer, wherein the gas turbine generator and the storage device are electrically co-located on a low side of the generator step-up transformer. The method of operation includes controlling the power output from the storage device and/or the gas turbine generator during planned and unplanned grid power demands to achieve economic and environmental performance advantages.

Disclosure of Invention

Disclosed is a hybrid power system including: at least one first isolation transformer having an input configured to be connectable to an output of a power supply; an energy storage system having at least one energy storage device and a power conversion system having at least one DC to AC converter connected to the at least one energy storage device; and at least one second isolation transformer configured to input a boost isolation transformer connected to an output of the storage system.

Also disclosed is a method of providing power, the method comprising: generating AC power via an AC power source; providing the power to an output node via at least a first isolation transformer; storing energy as a DC voltage in an energy storage system; providing power from an energy storage system to an output node via a DC-to-AC converter and a boost isolation transformer, the energy storage system, the DC-to-AC converter and the boost isolation transformer connected to the output node in parallel with an AC power source and a first isolation transformer; and controlling the AC power source and the energy storage system to regulate power provided to the output node.

Also disclosed is a control unit for controlling a hybrid power system, the control unit including: a communication interface; at least one processor; and at least one memory including computer program code. The at least one memory and the computer program code may be configured to, with the at least one processor, cause the control unit to: generating AC power via an AC power source; providing power to an output node via at least a first isolation transformer; storing energy as a DC voltage in an energy storage system; providing power from an energy storage system to an output node via a DC-to-AC converter and a boost isolation transformer, the energy storage system, the DC-to-AC converter and the boost isolation transformer connected to the output node in parallel with an AC power source and a first isolation transformer; and controlling the AC power source and the energy storage system to regulate power provided to the output node.

Drawings

Other features and advantages of the present disclosure will become more apparent upon reading the following detailed description in conjunction with the accompanying drawings, in which like elements are referred to by like reference numerals, and in which:

FIG. 1 illustrates an exemplary hybrid power system that couples a power source (e.g., a gas turbine generator) having an energy storage system on the high-voltage side of an isolation transformer to a medium-voltage (e.g., 2kV or less to 35kV or more) AC bus, for example, to achieve higher performance and lower operating costs;

fig. 2 illustrates a block diagram of an exemplary communication network architecture that may be used with embodiments of a control unit, for example, to facilitate control of aspects of embodiments of a hybrid power system;

fig. 3 illustrates an exemplary flow diagram that may be used by an embodiment of a control unit, for example, to control aspects of an embodiment of a hybrid power system.

Detailed Description

Fig. 1 illustrates an exemplary hybrid power system 100 that couples a power source 102 (e.g., one or more gas turbine generators with an energy storage system 106 on the high-voltage side of one or more shunt isolation transformers 104) to a medium-voltage AC bus 126 (e.g., 2kV to 35kV), for example, to achieve higher energy supply/load performance and lower operating costs.

Where multiple Gas Turbine Generators (GTGs) 102 are provided, each such generator is connected to a medium voltage AC bus 126 via an isolation transformer 104. Each GTG 102 may be isolated from the medium voltage AC bus 126 by a protection switch 124 and each GTG 102 may be individually metered to manage the power and operating conditions it generates.

One or more Battery Energy Storage Systems (BESS)106 may also be provided. Each BESS 106 may include a Power Conversion System (PCS) and one or more battery packs 108 connected in parallel on a common DC bus 114. Each battery pack 108 may include a plurality of battery modules 122 connected in series.

In the exemplary fig. 1 embodiment, power conversion system 110 of battery energy storage system 106 is connected to a low (or medium) voltage AC bus 118 (e.g., less than 2kV or other suitable voltage), then to a step-up isolation transformer 116, and then to a medium (or high) voltage AC bus (e.g., a voltage greater than 2 kV). A group of battery energy storage system cells may be isolated from the medium voltage AC bus 126 via a protection switch 128, which protection switch 128 may be configured in a known manner.

The hybrid system 100 may be connected to a load 122 (e.g., a public or other utility grid 122). It may be isolated from the grid via a site protection switch 130 of known configuration. The entire system 100 may be metered by a site meter 132 at a common coupling point

The hybrid system 100 may also form its own microgrid and in this case it may be connected to a load 122.

The embodiment of fig. 1 will now be described in more detail.

An input (e.g., a low side voltage of a step-up transformer) of the at least one first isolation transformer 104 is configured to be connectable to an output of the power supply 102.

An energy storage system 106 having at least one energy storage device 108 and a power conversion system 110 having, for example, at least one DC to AC converter 111 are connected to the at least one energy storage device 108. Each energy storage device 108 may be, for example, one or more parallel batteries and/or a battery pack (e.g., series-connected batteries) having one or more battery modules 112 connected to a battery DC bus 114. Of course, other suitable storage devices may be used, such as capacitors (e.g., medium or high voltage capacitors) to provide sufficient voltage for a low voltage AC bus (e.g., less than 2 kV).

A low side input of at least one second isolation transformer 116 configured as a step-up isolation transformer 116 is connected to an output of the energy storage system 106. For example, each step-up transformer 116 is connected to a low voltage AC bus 118 at the output of each DC-to-AC converter 111.

The hybrid power system 100 as shown may include a power source 102 for generating AC power.

As already mentioned, the power source 102 may be, for example, a gas turbine generator, or a plurality of gas turbine generators connected in parallel, or any other suitable generator system or device. Each gas turbine generator 102 or GTG may be ramped up, for example, from a 0MW condition to meet a 50MW or 100MW or less or greater full load condition. The first isolation transformer 104 may boost the voltage to any suitable voltage as desired for providing the desired power to the load 122.

The at least one first isolation transformer 104 may include a plurality of isolation transformers 104, each isolation transformer 104 connected in parallel to a respective one of the plurality of gas turbine generators 102.

The energy storage system 100 may include a plurality of energy storage devices 108, each plurality of energy storage devices 108 including at least one battery module 112 as already mentioned.

The at least one second isolation transformer 116 may include a plurality of isolation step-up transformers 116, each of the plurality of isolation step-up transformers 116 connected to one of the plurality of DC to AC converters 111 of the energy storage system 106. The energy storage system 106 may, for example, provide an output voltage that is independent of the supply voltage, thus boosting the output to the same voltage as the output of the voltage transformer 104 via the step-up transformer 116 to meet the power demand (e.g., 50MW) of the load 122.

An output node 120 may be provided as a connection for connecting the output of the first isolation transformer 104 and the parallel output of the second isolation transformer 116 (e.g., node 120 is a utility grid, or is connected to a load 122 in a microgrid site isolated from the utility grid).

Output node 120 is a connection for providing power of hybrid power system 100 to a load 122 (which may be, for example, a utility grid) via a medium voltage AC bus 126.

The hybrid power system 100 may include a power feeder protection switch 124 and a meter 126 connected in series between the output of the at least one first isolation transformer 104 and the output node 120.

The hybrid power system 100 may include an energy storage feeder protection switch 128 connected in series between the output of the at least one isolation step-up transformer 116 and the output node 120.

The hybrid power system 100 may include a site protection switch 130 and a site meter 132 connected to an output at the output node 120 in series between the output node 120 and the load 122. Each of the protection switches 124, 128, 130 may be, for example, a known relay or other suitable device that allows for monitoring and controlling of overcurrent, overvoltage, and/or overpower conditions to protect the system 100 as needed (e.g., by jumping to an open circuit condition at a given threshold) and/or to provide isolation.

The hybrid power system 100 may include a control unit 134 for controlling the output of the power source 102 and the energy storage system 106 via bidirectional and control lines. For example, the control unit 134 may regulate the output power provided from the power source 102 and/or the energy storage device 106 using, for example, known feed-forward and/or feedback loops based on, for example, load conditions, a state of charge of the battery module 112, desired control of the gas turbine, and a desired ramp rate of a desired output to be provided to the load 122. Meter 126 may be, for example, a meter that provides voltage, current, and/or power feedback, as site meter 132 may be used to control the power provided by power system 100 to load 122 (e.g., a utility grid or microgrid). The control unit 134 may be controlled according to, for example, user input and/or a load demand schedule provided by an operator. The battery charge may be based on market or other specified conditions, with an exemplary goal being to deliver the projected energy by optimizing cost, performance, and operational information in any known manner. The control unit 134 may issue commands to start and stop the power supply system 100, charge the energy storage system battery, and ramp up the output at a specified ramp rate to meet specified requirements in a known manner. The gas turbine may be controlled to provide a constant output and/or a desired ramp rate, for example, in conjunction with the output of the energy storage system 106. In an exemplary embodiment, the energy storage system 106 may be charged, for example, by wind energy, solar energy, geothermal energy, or the like, and the power source may provide backup energy.

Hybrid energy system 100 may also include known power electronics associated with power conversion and balancing of load 122.

Also disclosed is a method for providing power, the method comprising: generating AC power via an AC power source 102; power is supplied to the output node 120 via at least the first isolation transformer 104; storing energy as a DC voltage in the energy storage system 106; power is supplied to the output node 120 from the energy storage system 106 via a power conversion system such as a DC-to-AC converter (or AC-to-AC frequency converter) and a step-up isolation transformer 116, the energy storage system 106, DC-to-AC converter and isolation transformer 116 being connected to the output node 120 in parallel with the AC power source 102 and the first isolation transformer 104; and controlling the AC power source 102 and the energy storage system 106 to regulate the power provided to the output node 120.

In an exemplary embodiment, the output node 120 may be connected to a utility grid, as already disclosed.

Referring to fig. 2 and 3, embodiments may include a control unit 134 for controlling aspects of the hybrid power system 100. The exemplary control unit 134 as shown has a communication interface 206, at least one processor 202 and at least one memory 204 comprising computer program code stored thereon. The at least one memory 204 and the computer program code are configured to, with the at least one processor 202, cause the control unit 134 to implement the exemplary method 300. For example, the processor 202 may cause the control unit 134 to perform the following steps. Step 302 may be to cause the control unit 134 to generate AC power via the AC power source 102. Step 304 may be for the control unit 134 to supply power to the output node 120 via at least the first isolation transformer 104. Step 306 may be for the control unit 134 to store the energy as a DC voltage in the energy storage system 106. Step 308 may be for the control unit 134 to supply power from the energy storage system 106 to the output node 120 via the DC to AC converter and the boost isolation transformer 116, the energy storage system 106, the DC to AC converter and the boost isolation transformer 116 being connected to the output node 120 in parallel with the AC power source 102 and the first isolation transformer 104. Step 310 may be for the control unit 134 to control the AC power source 102 and the energy storage system 106 to regulate power provided to the output node 120.

Embodiments of processor 202 may be at least one of a scalable processor, a parallelizable processor, and optimized for multi-threaded processing capability. In some implementations, the processor 202 may be a Graphics Processing Unit (GPU). In some implementations, the processor 202 may be a supercomputer or a quantum computer that selects processing power based on expected network traffic (e.g., data flow). Processor 202 may include any integrated circuit or other electronic device (or collection of devices) capable of performing an operation on at least one instruction, including but not limited to Reduced Instruction Set Core (RISC) processors, CISC microprocessors, microcontroller units (MCUs), CISC-based Central Processing Units (CPUs), and Digital Signal Processors (DSPs). The hardware of these devices may be integrated onto a single substrate (e.g., a silicon "die"), or distributed between two or more substrates. Various functional aspects of the processor 202 may be implemented solely as software or firmware associated with the processor 202.

Optionally, a memory 204 may be associated with the processor 202. Embodiments of memory 204 may include volatile memory storage (e.g., RAM), non-volatile memory storage (e.g., ROM, flash memory, etc.), or some combination of the two. For example, the memory may include, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology CDROM, Digital Versatile Disks (DVD) or other optical storage, magnetic disks, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by the processor 202. According to an example embodiment, the memory 204 may be a non-transitory computer-readable medium. The term "computer-readable medium" (or "machine-readable medium") as used herein is an extensible term referring to any medium or any memory that participates in providing instructions to processor 202 for execution, or any mechanism that stores or transmits information in a form readable by a machine (e.g., a computer). Such a medium may store computer-executable instructions to be executed by a processing element and/or control logic and data which is manipulated by a processing element and/or control logic and may take many forms, including but not limited to, non-volatile media, and transmission media.

Transmission media includes coaxial cables, copper wire and fiber optics, including the wires that comprise or form a bus. Transmission media can also take the form of acoustic or light waves (e.g., those generated during radio wave and infrared data communications), or other forms of propagated signals (e.g., carrier waves, infrared signals, digital signals, etc.). Forms of computer-readable media include, for example, a floppy disk, a flexible disk, hard disk, magnetic tape, or any other magnetic medium, a CD-ROM, any other optical medium, punch cards, paper tape, any other physical medium with patterns of holes, a RAM, a PROM, and EPROM, a FLASH-EPROM, any other memory chip or cartridge, a carrier wave as described hereinafter, or any other medium from which a computer can read.

Instructions for implementing any of the methods described above may be stored in the form of computer program code in the memory 204. The computer program code may include program logic, control logic, or other algorithms, which may or may not be based on artificial intelligence (e.g., machine learning techniques, artificial neural network techniques, etc.).

In some embodiments, the control unit 134 may be part of or connected to the communication network 200. For example, the control unit 134 may include switches, transmitters, transceivers, routers, gateways, and the like to facilitate communication via communication protocols that facilitate controlled and coordinated signal transmission and processing. The communication link may be established by a communication protocol that allows the control unit 134 to form the communication interface 206. The communication interface 206 may be configured to allow the control unit 134 and another device (e.g., a computer device or processor) to form the communication network 200. For example, the control unit 134 may be configured to communicate with a control processor (e.g., a chip, an expansion card, a microcontroller, a PID controller, etc.) associated with the components of the hybrid power system 100 and facilitate data transfer between the control unit 134 and at least one component of the hybrid power system 100. The communication network 200 may be configured as a remote wired or wireless network such as ethernet, telephone, Wi-Fi, bluetooth, wireless protocol, cellular, satellite network, cloud computing network, and the like. Embodiments of the communication network may be configured to a predetermined network topology. This may include a mesh network topology, a point-to-point network topology, a ring (or peer-to-peer) network topology, a star (point-to-multipoint) network topology, or any combination thereof.

Additionally, any component of the hybrid power system 100 may have an Application Programming Interface (API) and/or other interface configured to facilitate execution of commands and control aspects of the system 100 by the control unit 134 in communication with the components of the system 100. Embodiments of the control unit 134 may be programmed to generate a user interface configured to facilitate control and display of various operational aspects of the system 100.

It will be appreciated by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The presently disclosed embodiments are therefore considered in all respects to be illustrative and not restrictive. The scope of the invention is indicated by the appended claims, rather than the foregoing description, and all changes that come within the meaning and range of equivalents thereof are intended to be embraced therein.