CN112049699A - A coal-fired generating set coupled with liquid compressed air energy storage peak regulation system and method - Google Patents
A coal-fired generating set coupled with liquid compressed air energy storage peak regulation system and methodDownload PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B23/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01B23/10—Adaptations for driving, or combinations with, electric generators
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K1/00—Steam accumulators
- F01K1/04—Steam accumulators for storing steam in a liquid, e.g. Ruth's type
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/14—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having both steam accumulator and heater, e.g. superheating accumulator
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/006—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for driven by steam engines
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Abstract
Translated fromChinese
Description
Translated fromChinese【技术领域】【Technical field】
本发明属于液态压缩空气储能技术领域，涉及一种储能调峰系统及方法，尤其是一种燃煤发电机组耦合液态压缩空气储能调峰系统及方法。The invention belongs to the technical field of liquid compressed air energy storage, and relates to a system and method for energy storage and peak regulation, in particular to a system and method for peak regulation of energy storage coupled to a coal-fired generator set with liquid compressed air.
【背景技术】【Background technique】
随着人们环保意识的提高，以及全球经济可持续发展的必要性，近些年，风电、光伏等可再生能源发电发展迅猛。但可再生能源昼夜峰谷差大和波动性强等特性，与电网运行持续、稳定的要求间存在矛盾。而储能技术能够很好地弥合可再生能源发电与电网间的特性差异，解决制约可再生能源大规模利用的瓶颈。With the improvement of people's awareness of environmental protection and the necessity of sustainable development of the global economy, in recent years, wind power, photovoltaics and other renewable energy power generation have developed rapidly. However, the characteristics of renewable energy, such as large difference between day and night peaks and valleys and strong volatility, are in contradiction with the requirements of continuous and stable operation of the power grid. Energy storage technology can well bridge the characteristics difference between renewable energy generation and power grid, and solve the bottleneck restricting the large-scale utilization of renewable energy.
储能技术按原理可分为三类：机械储能(如抽水蓄能、压缩空气储能等)、电化学储能(铅酸电池、锂离子电池等)和电磁储能。压缩空气储能技术具有寿命长、环境污染小、运行维护费用低等特点，具备规模化推广应用潜力，特别是液态压缩空气储能技术，通过对空气深冷液化实现压缩空气的液态存储，大幅缩小储存容积，极大地提升了系统储能密度。但是常规液态压缩空气储能系统整体储能效率较低、运行成本较高。Energy storage technology can be divided into three categories according to the principle: mechanical energy storage (such as pumped hydro energy storage, compressed air energy storage, etc.), electrochemical energy storage (lead-acid batteries, lithium-ion batteries, etc.) and electromagnetic energy storage. The compressed air energy storage technology has the characteristics of long life, low environmental pollution, low operation and maintenance costs, etc., and has the potential for large-scale promotion and application, especially the liquid compressed air energy storage technology, which realizes the liquid storage of compressed air through the cryogenic liquefaction of air. Reducing the storage volume greatly improves the energy storage density of the system. However, the overall energy storage efficiency of the conventional liquid compressed air energy storage system is low and the operating cost is high.
【发明内容】[Content of the invention]
本发明目的在于解决上述现有技术中的问题，提出一种燃煤发电机组耦合液态压缩空气储能调峰系统及方法。The purpose of the present invention is to solve the above-mentioned problems in the prior art, and propose a system and method for energy storage peak regulation coupled with a coal-fired generator set coupled with liquid compressed air.
为达到上述目的，本发明采用以下技术方案予以实现：To achieve the above object, the present invention adopts the following technical solutions to realize:
一种燃煤发电机组耦合液态压缩空气储能调峰系统，包括燃煤发电机组、第一离合器-齿轮箱、第二离合器-齿轮箱，以及依次连接的空气压缩机、制冷膨胀机、气液分离装置、空气储罐、升压泵、加热器、空气膨胀机和第二发电机；A coal-fired generator set coupled with a liquid compressed air energy storage peak regulation system, comprising a coal-fired generator set, a first clutch-gearbox, a second clutch-gearbox, and an air compressor, a refrigeration expander, a gas-liquid Separation unit, air storage tank, booster pump, heater, air expander and second generator;
所述燃煤发电机组中的低压缸通过第一离合器-齿轮箱与燃煤发电机组中的第一发电机相连；The low-pressure cylinder in the coal-fired generator set is connected to the first generator in the coal-fired generator set through a first clutch-gearbox;
所述燃煤发电机组中的低压缸通过第二离合器-齿轮箱与空气压缩机相连；The low pressure cylinder in the coal-fired generator set is connected with the air compressor through the second clutch-gearbox;
空气在所述空气压缩机被加压后，进入制冷膨胀机膨胀放热，在气液分离装置中完成液态空气与气态空气的分离，液态空气存储在空气储罐中，经升压泵加压后进入加热器升温，之后进入空气膨胀机膨胀做功，驱动第二发电机发电。After the air is pressurized by the air compressor, it enters the refrigeration expander to expand and release heat, and the separation of liquid air and gaseous air is completed in the gas-liquid separation device. The liquid air is stored in the air storage tank and is pressurized by the booster pump. Then enter the heater to heat up, and then enter the air expander to expand and do work, and drive the second generator to generate electricity.
本发明进一步的改进在于：The further improvement of the present invention is:
所述燃煤发电机组中的低压缸、第一离合器-齿轮箱和第二离合器-齿轮箱同轴设置；The low-pressure cylinder, the first clutch-gearbox and the second clutch-gearbox in the coal-fired generator set are coaxially arranged;
所述燃煤发电机组包括依次连接的锅炉、高压缸、中压缸和低压缸；The coal-fired generator set includes a boiler, a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder connected in sequence;
所述锅炉出口新蒸汽进入高压缸做功后，返回锅炉进行二次加热，再依次进入中压缸和低压缸膨胀做功。After the new steam from the boiler outlet enters the high pressure cylinder to do work, it returns to the boiler for secondary heating, and then enters the medium pressure cylinder and the low pressure cylinder for expansion and work in turn.
还包括依次连接的凝汽器、凝结水泵、低压加热器组、给水泵和高压加热器组；It also includes a condenser, a condensate pump, a low-pressure heater group, a feed water pump and a high-pressure heater group connected in sequence;
所述燃煤发电机组中低压缸的排汽进入凝汽器冷凝后，依次经过凝结水泵、低压加热器组、给水泵、高压加热器组升温升压后，返回锅炉。The exhaust steam from the low-pressure cylinder in the coal-fired generator set enters the condenser for condensation, passes through the condensate water pump, the low-pressure heater group, the feed water pump, and the high-pressure heater group in order to increase the temperature and pressure, and then returns to the boiler.
一种燃煤发电机组耦合液态压缩空气储能调峰方法，包括以下步骤：A method for peak regulation of energy storage coupled with liquid compressed air for a coal-fired generator set, comprising the following steps:
当Q1≤60％Q2时，通过第一离合器-齿轮箱将低压缸与第一发电机脱开，通过低压缸驱动空气压缩机运转；空气在所述空气压缩机被加压后，进入制冷膨胀机膨胀放热，在气液分离装置中完成液态空气与气态空气的分离，液态空气存储在空气储罐中，完成液态空气压缩储能过程；其中Q1为电网调度负荷，Q2为燃煤发电机组额定负荷；When Q1 ≤60% Q2 , the low-pressure cylinder is disconnected from the first generator through the first clutch-gearbox, and the low-pressure cylinder drives the air compressor to run; after the air compressor is pressurized, the air enters the The refrigeration expander expands and releases heat, completes the separation of liquid air and gaseous air in the gas-liquid separation device, and stores the liquid air in the air storage tank to complete the liquid air compression and energy storage process; where Q1 is the grid dispatch load, and Q2 is Rated load of coal-fired generator set;
当60％Q2＜Q1≤Q2时，通过第二离合器-齿轮箱将低压缸与空气压缩机脱开，低压缸通过第一离合器-齿轮箱驱动第一发电机发电；When 60% Q2 <Q1 ≤ Q2 , the low-pressure cylinder is disconnected from the air compressor through the second clutch-gearbox, and the low-pressure cylinder drives the first generator to generate electricity through the first clutch-gearbox;
当Q1>Q2时，存储在空气储罐中的液态空气依次经升压泵、空气加热器升压升温后，进入空气膨胀机膨胀做功，驱动第二发电机发电。When Q1 >Q2 , the liquid air stored in the air storage tank is boosted and heated up by the booster pump and the air heater in turn, and then enters the air expander to expand and do work, and drives the second generator to generate electricity.
上述方法的进一步改进在于：A further improvement of the above method is:
所述气液分离装置中分离出的气态空气引回至空气压缩机重新压缩。The gaseous air separated in the gas-liquid separation device is led back to the air compressor for recompression.
与现有技术相比，本发明具有以下有益效果：Compared with the prior art, the present invention has the following beneficial effects:
1.本发明提出一种可实现低压缸切除运行的燃煤发电机组耦合液态压缩空气储能调峰系统，通过第一离合器-齿轮箱和第二离合器-齿轮箱，实现低压缸出力在燃煤发电机组与液态压缩空气储能系统之间的切换，从而提高燃煤发电机组电出力调节能力，并提高整体系统运行效能。1. The present invention proposes a coal-fired generator set coupling liquid compressed air energy storage peak regulation system that can realize low-pressure cylinder cut-off operation. The switch between the generator set and the liquid compressed air energy storage system can improve the power output regulation ability of the coal-fired generator set and improve the overall system operation efficiency.
2.本发明中低压缸、第一离合器-齿轮箱和第二离合器-齿轮箱同轴设置，便于调节第一发电机和低压缸，以及空气压缩机和低压缸之间的连接或脱开。2. The medium and low pressure cylinder, the first clutch-gearbox and the second clutch-gearbox are coaxially arranged in the present invention, which facilitates adjustment of the connection or disconnection between the first generator and the low-pressure cylinder, as well as the air compressor and the low-pressure cylinder.
3.本发明提出的一种可实现低压缸切除运行的燃煤发电机组耦合液态压缩空气储能调峰方法，通过第一离合器-齿轮箱和第二离合器-齿轮箱，实现低压缸出力在燃煤发电机组与液态压缩空气储能系统之间的切换，当电网调度负荷降低时，通过第一离合器-齿轮箱将低压缸从燃煤发电机组中脱开，低压缸出力用于驱动液态压缩空气储能系统空气压缩机运转，从而降低机组发电出力；当电网调度负荷升高时，通过离合器-齿轮箱组，将低压缸出力用于驱动燃煤发电机组发电机运转，当电网调度负荷进一步升高时，液态压缩空气储能系统对外释能发电，液态空气升压升温后进入空气膨胀机做功，带动第二发电机发电，提高系统对外供电量。与常规液态压缩空气储能系统相比较，该系统取消了空气压缩系统电动机配置，简化了系统布置，降低系统建设投资。3. A coal-fired generator set coupling liquid compressed air energy storage peak regulation method that can realize the low-pressure cylinder cut-off operation proposed by the present invention, through the first clutch-gearbox and the second clutch-gearbox, the output of the low-pressure cylinder is realized in the combustion. The switch between the coal-fired generator set and the liquid compressed air energy storage system, when the grid dispatch load decreases, the low-pressure cylinder is disconnected from the coal-fired generator set through the first clutch-gearbox, and the output of the low-pressure cylinder is used to drive the liquid compressed air The air compressor of the energy storage system operates, thereby reducing the power generation output of the unit; when the grid dispatching load increases, the low-voltage cylinder output is used to drive the coal-fired generator set through the clutch-gearbox group. When the grid dispatching load further increases When it is high, the liquid compressed air energy storage system releases energy to generate electricity. After the liquid air is boosted and heated up, it enters the air expander to do work, which drives the second generator to generate electricity and increases the external power supply of the system. Compared with the conventional liquid compressed air energy storage system, the system cancels the motor configuration of the air compression system, simplifies the system layout, and reduces the investment in system construction.
【附图说明】【Description of drawings】
为了更清楚的说明本发明实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本发明的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。In order to describe the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.
图1为本发明燃煤发电机组耦合液态压缩空气储能调峰系统实施例的示意图。FIG. 1 is a schematic diagram of an embodiment of a coal-fired generating set coupled with a liquid compressed air energy storage peak regulation system according to the present invention.
其中：1-锅炉、2-高压缸、3-中压缸、4-低压缸、5-第一发电机、6-凝汽器、7-凝结水泵、8-低压加热器组、9-给水泵、10-高压加热器组、11-第一离合器-齿轮箱、12-第二离合器-齿轮箱、13-空气压缩机、14-制冷膨胀机、15-气液分离装置、16-空气储罐、17-升压泵、18-加热器、19-空气膨胀机、20-第二发电机。Among them: 1-boiler, 2-high pressure cylinder, 3-medium pressure cylinder, 4-low pressure cylinder, 5-first generator, 6-condenser, 7-condensate pump, 8-low pressure heater group, 9-feeder Water pump, 10-high pressure heater group, 11-first clutch-gearbox, 12-second clutch-gearbox, 13-air compressor, 14-refrigeration expander, 15-gas-liquid separation device, 16-air storage Tank, 17-Booster Pump, 18-Heater, 19-Air Expander, 20-Second Generator.
【具体实施方式】【Detailed ways】
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本发明实施例的组件可以以各种不同的配置来布置和设计。In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.
因此，以下对在附图中提供的本发明的实施例的详细描述并非旨在限制要求保护的本发明的范围，而是仅仅表示本发明的选定实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义和解释。It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.
在本发明实施例的描述中，需要说明的是，若出现术语“上”、“下”、“水平”、“内”等指示的方位或位置关系为基于附图所示的方位或位置关系，或者是该发明产品使用时惯常摆放的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”等仅用于区分描述，而不能理解为指示或暗示相对重要性。In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inside", etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings , or the orientation or positional relationship that the product of the invention is usually placed in use, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed in a specific orientation and operation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are only used to differentiate the description and should not be construed to indicate or imply relative importance.
此外，若出现术语“水平”，并不表示要求部件绝对水平，而是可以稍微倾斜。如“水平”仅仅是指其方向相对“竖直”而言更加水平，并不是表示该结构一定要完全水平，而是可以稍微倾斜。Furthermore, the presence of the term "horizontal" does not imply that the component is required to be absolutely horizontal, but rather may be tilted slightly. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.
在本发明实施例的描述中，还需要说明的是，除非另有明确的规定和限定，若出现术语“设置”、“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。In the description of the embodiments of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. It can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
下面结合附图对本发明做进一步详细描述：Below in conjunction with accompanying drawing, the present invention is described in further detail:
参见图1，本发明提出了一种可实现低压缸切除运行的燃煤发电机组耦合液态压缩空气储能调峰系统，作为一种优选方案，由锅炉1、高压缸2、中压缸3、低压缸4、第一发电机5、凝汽器6，凝结水泵7，低压加热器组8，给水泵9，高压加热器组10，第一离合器-齿轮箱11、第二离合器-齿轮箱12、空气压缩机13、制冷膨胀机14、气液分离装置15、空气储罐16、升压泵17、加热器18、空气膨胀机19、第二发电机20组成。Referring to Fig. 1, the present invention proposes a coal-fired generator set coupled with liquid compressed air energy storage peak regulation system that can realize low-pressure cylinder cut-off operation.
锅炉1出口新蒸汽进入高压缸2做功后返回锅炉1进行二次加热，之后依次进入中压缸3和低压缸4膨胀做功，带动第一发电机5发电。低压缸4的排汽进入凝汽器6冷凝后，依次经过凝结水泵7、低压加热器组8、给水泵9、高压加热器组10升温升压后，返回锅炉1，完成燃煤发电机组汽水循环。The new steam from the outlet of
当液态压缩空气储能系统储能模式运行时，通过第二离合器-齿轮箱12将燃煤发电机组同空气压缩机13相结合，带动空气压缩机13运转，空气被加压后进入制冷膨胀机14膨胀放热，在气液分离装置15中完成液态空气与气态空气的分离，液态空气存储在空气储罐16中，所分离气态空气返回空气压缩机13入口进行重新压缩。完成液态压缩空气储能系统空气压缩液化储能过程。When the liquid compressed air energy storage system operates in the energy storage mode, the coal-fired generator set is combined with the
当液态压缩空气储能系统释能发电模式运行时，空气储罐16出口液态空气经升压泵17加压后进入加热器18升温，之后进入空气膨胀机19膨胀做功，驱动第二发电机20发电，完成液态压缩空气储能系统发电释能过程。When the liquid compressed air energy storage system operates in the energy-releasing power generation mode, the liquid air at the outlet of the
本发明提出的一种可实现低压缸切除运行的燃煤发电机组耦合液态压缩空气储能调峰系统，将燃煤发电机组与液态压缩空气储能系统相耦合，液态压缩空气储能系统中的空气压缩机13与汽轮机组同轴布置，当液态压缩空气储能系统储能模式运行时，通过第二离合器-齿轮箱12将汽轮发电机组与空气压缩机13相结合，驱动空气压缩机13运转。当液态压缩空气储能系统不进行空气压缩储能时，第二离合器-齿轮箱12脱开。与常规液态压缩空气储能系统相比较，本发明所提出系统避免了空气压缩机所需驱动电动机的配置，从而简化系统布置，降低系统建设投资。The present invention proposes a coal-fired generator set that can realize low-pressure cylinder cut-off operation coupled with a liquid compressed air energy storage peak regulation system, and couples the coal-fired generator set and the liquid compressed air energy storage system. The
低压缸4布置在第一发电机5与空气压缩机13之间。通过第一离合器-齿轮箱11和第二离合器-齿轮箱12，实现低压缸4出力在燃煤发电机组与液态压缩空气储能系统之间的切换。The
当Q1≤60％Q2时，通过第一离合器-齿轮箱11将低压缸4与第一发电机5脱开，通过低压缸4驱动空气压缩机13运转；空气在所述空气压缩机13被加压后，进入制冷膨胀机14膨胀放热，在气液分离装置15中完成液态空气与气态空气的分离，液态空气存储在空气储罐16中，完成液态空气压缩储能过程；其中Q1为电网调度负荷，Q2为燃煤发电机组额定负荷；When Q1 ≤ 60% Q2 , the low-
当60％Q2＜Q1≤Q2时，通过第二离合器-齿轮箱12将低压缸4与空气压缩机13脱开，低压缸4通过第一离合器-齿轮箱11驱动第一发电机5发电；When 60% Q2 <Q1 ≤ Q2 , the low-
当Q1>Q2时，存储在空气储罐16中的液态空气依次经升压泵17、空气加热器18升压升温后，进入空气膨胀机19膨胀做功，驱动第二发电机20发电，满足电网负荷需求。When Q1 >Q2 , the liquid air stored in the
以上仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
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