Distributed power system, control method and energy system

Abstract

The present invention discloses a distributed power system, a control method and an energy system, which include multiple groups of supercharging units and one or more groups of output units; further includes a heat exchanger module, which is connected to each supercharging unit and each output unit through pipelines respectively, and is used for heating the power cycle medium, and is also used for recycling the heat energy of the power cycle medium; further includes a regulation device, which is used for controlling the flow rate of the pipeline between the heat exchanger module and the input end of each supercharging unit, and is also used for controlling the flow rate, on-off of the pipeline between the heat exchanger module and the input end of each output unit. By distributing the power sources, and adopting small-power-level rotating machinery with multiple groups of supercharging units and one or more groups of output units, module mass production can be realized, the research and development cycle and production cost of large rotating equipment can be greatly reduced, meanwhile, the difficulty and cost of maintenance and repair are reduced, and it has stronger scalability and can meet the requirements of cycle power upgrade.

Description

Technical Field

[0001] The present invention relates to the field of power systems, and in particular, to a distributed power system. In addition, the present invention also relates to a control method for controlling the above-mentioned distributed power system and an energy system including the above-mentioned distributed power system. Background Art

[0002] Thermal power plants and various application scenarios (ships, special vehicles, factories, etc.) need to convert heat energy into work or electricity through a power cycle. Common power cycles include the steam Rankine cycle, the Brayton cycle, etc. Different power cycle forms can meet the requirements of different application scenarios. Most application scenarios usually have only one compressor / core machine / water pump or turbine expander / steam turbine.

[0003] Currently, for the power cycle using a single compressor / core machine / water pump or turbine expander / steam turbine, the single rotating machine results in a single control strategy for the cycle. When the power demand fluctuates, if the output power is reduced, the rotating machine is likely to deviate from the optimal speed / flow working range, resulting in a reduction in cycle efficiency; if it operates in the original state, without an energy storage system, it will cause energy waste, and equipping with an energy storage system will increase the system cost, volume, and maintenance difficulty. When the output power of the power cycle is in the megawatt range, its rotating machine also faces problems such as a long design time, large processing and maintenance difficulties, and high costs.

[0004] The disadvantages of the power cycle using a single compressor / core machine / water pump or turbine expander / steam turbine are as follows: The control strategy is single. When the power demand fluctuates, without an energy storage system, once the rotating machine deviates from the optimal speed / flow working range, it will lead to a reduction in cycle efficiency or an excess power output, wasting energy. And equipping with an energy storage system will make the system more complex, occupy a large space, increase costs, and improve the maintenance difficulty. At the same time, in the application environment of megawatt-level power cycles, the system design time is long, the large size of the rotating machine results in a large space occupation, difficult processing, high costs for preparation, transportation, etc., and thus its maintenance difficulty and maintenance cost are high. Summary of the Invention

[0005] The present invention provides a distributed power system, a control method, and an energy system to solve the technical problems of the existing large-scale power system being complex, having high costs, and poor adaptability to power fluctuation requirements.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A distributed power system includes a boosting device and an output device,

[0008] The supercharging device includes multiple groups of supercharging units arranged in parallel, which are used to supercharge the power cycle medium of the distributed power system; the output device includes a group of output units or multiple groups of output units arranged in parallel, which are used to convert the thermal energy of the power cycle medium into electrical energy for output or convert it into mechanical energy for output;

[0009] It further includes a heat exchanger module, which is connected to each of the supercharging units and each of the output units through pipelines. The heat exchanger module is used to raise the temperature of the power cycle medium input to the output device, and the heat exchanger module is also used to recycle the thermal energy of the power cycle medium;

[0010] It further includes a first control device, which is used to control the flow rate and on / off of the pipeline between the heat exchanger module and the input ends of each of the supercharging units, so as to adjust the output power of the distributed power system;

[0011] It further includes a second control device, which is used to control the flow rate and on / off of the pipeline between the heat exchanger module and the input ends of each of the output units, so as to adjust the output power of the distributed power system.

[0012] The heat exchanger module includes a storage device, which is used to store the power cycle medium of the power system.

[0013] A third control device is arranged at the outlet end and / or the inlet end of the storage device. The third control device is used to adjust its inlet flow rate and its outlet flow rate, so as to adjust the total circulation flow rate of the distributed power system.

[0014] As a preferred mode, the distributed power system further includes a control module, which is used to respectively control the first control device, the second control device and the third control device according to the load of the distributed power system, so as to adjust the output power of the distributed power system.

[0015] As a preferred mode, the first control device includes first valves respectively arranged on the pipelines from the heat exchanger module to the inlets of each of the supercharging devices; the second control device includes second valves respectively arranged on the pipelines from the heat exchanger module to the inlets of each of the output devices; the third control device includes a third valve arranged at the inlet end of the storage device and a fourth valve arranged at the outlet end of the storage device.

[0016] According to another aspect of the present invention, a control method is further provided, which includes the distributed power system described in any one of the above. The control method includes:

[0017] If the load of the distributed power system increases, the number of opened pipelines at the corresponding positions is increased and / or the pipeline flow rate is adjusted through the first control device, and the number of opened pipelines at the corresponding positions is increased and / or the pipeline flow rate is adjusted through the second control device according to the number of opened pipelines and the pipeline flow rate at the corresponding positions of the first control device;

[0018] If the load of the distributed power system decreases, the number of opened pipelines at the corresponding positions is decreased and / or the pipeline flow rate is adjusted through the first control device, and the number of opened pipelines at the corresponding positions is decreased and / or the pipeline flow rate is adjusted through the second control device according to the number of opened pipelines and the pipeline flow rate at the corresponding positions of the first control device.

[0019] As a preferred method, the control method further includes:

[0020] If the load of the distributed power system is in the maximum power state, the booster unit and the output unit operate in the maximum state;

[0021] If the load of the distributed power system decreases and the output efficiency of the distributed power system is within the optimal operating range, the pipeline flow rate at the corresponding positions is decreased through the first control device, and the pipeline flow rate at the corresponding positions is decreased through the second control device;

[0022] If the load of the distributed power system decreases and the output efficiency of the distributed power system deviates from the optimal operating range, the number of opened pipelines is decreased through the first control device and the pipeline flow rate of the pipelines at other opened positions is adjusted through the first control device, and the number of opened pipelines at the corresponding positions is adjusted and / or the pipeline flow rate is adjusted through the second control device so that the load of the distributed power system is within the optimal operating range.

[0023] According to another aspect of the present invention, an energy system is further provided, which includes the distributed power system described in any one of the above and is arranged according to the steam Rankine cycle principle. The power cycle medium is water, and the heat exchanger module includes a condenser, a regenerator, and a heater; the condenser is used to condense gaseous water into liquid water and then input it to each booster unit, and the heater is used to heat the liquid water into superheated steam and then input it to each output unit for work; the regenerator has a high-temperature side and a low-temperature side. The high-temperature side is used to collect the water after work at the outlet end of each output unit, cool it and output it to the condenser for recycling, and the low-temperature side is used to collect the water at the outlet end of the booster unit, heat it by using the waste heat of the high-temperature side, and then output it to the heater for recycling.

[0024] As a preferred method, the booster unit includes a water pump; the output unit includes a steam turbine, or includes a steam turbine and a generator arranged coaxially.

[0025] According to another aspect of the present invention, an energy system is further provided, which includes the distributed power system described in any one of the above and is arranged according to the Brayton cycle principle. The power cycle medium is carbon dioxide gas. The heat exchanger module includes a pre-cooler, a regenerator, and a heater. The pre-cooler is used to cool the carbon dioxide and then input it into each of the booster units. The heater is used to heat the carbon dioxide and then input it into each of the output units to do work. The regenerator has a high-temperature side and a low-temperature side. The high-temperature side is used to collect the carbon dioxide after doing work at the outlet end of each of the output units, cool it, and output it to the pre-cooler to be put into circulation. The low-temperature side is used to collect the carbon dioxide at the outlet end of each of the booster units, use the waste heat of the high-temperature side to raise the temperature, and then output it to the heater to be put into circulation.

[0026] The present invention has the following beneficial effects: When the load of the distributed power system is at the highest value under the current system conditions, the output power of the system is at the highest value at this time, and the pipeline flow rates at the corresponding positions of the first control device and the second control device are opened to the maximum; that is, both the booster units and the output units operate at the maximum state.

[0027] The heat exchanger module also serves as a heat energy input to input heat energy into the system so that the output device can obtain sufficient heat energy and convert it into mechanical energy or electrical energy. At the same time, the power cycle medium continues to be put into circulation after doing work in the output device. Therefore, the waste heat of the power cycle medium at the outlet end of the output device can be used to provide heat energy for the power cycle medium that is at a low temperature and needs to be heated in the system, making full use of energy.

[0028] When the system load decreases, the pipeline flow rates at the corresponding positions are adjusted through the first control device and the second control device, and then the rotational speeds of each booster unit and each output unit are adjusted to adjust the output power of the distributed power system.

[0029] When the system load further decreases, the required power decreases. If the flow rates / rotational speeds of the booster units and the output units are further reduced, it will cause the rotating machinery module to deviate from the optimal operating condition range, resulting in a decrease in output efficiency. Based on this, at least one booster unit is shut down by correspondingly closing the pipeline at some positions through the first control device, and the flow rate of the booster units at the positions where the pipeline is not closed is adjusted (for example, appropriately increasing the flow rate so that the total output power of the system tends to be the total output power before shutting down one booster unit). At the same time, if there are multiple output units, at least one output unit is synchronously shut down and the flow rates of the remaining output units are adjusted. If there is only one output unit, the flow rate is correspondingly reduced through the second control device, so that the booster units and the output units are in the optimal operating condition area, and the power generation cycle system operates at the best efficiency state. The working principle is the same when the system load increases.

[0030] This distributed power system can be applied to fields such as thermal power plants, ships, special vehicles, and aviation. By distributing the power sources, and using small-power rotating machinery with multiple sets of supercharging units and one or more sets of output units, modular mass production can be achieved, significantly reducing the development cycle and production cost of large rotating equipment. At the same time, the difficulty and cost of maintenance and repair are reduced, and it has stronger scalability to meet the requirements of cyclic power upgrade. Based on this, different numbers of rotating machinery modules can be selected according to different application scenarios to flexibly and quickly match different output power requirements, and the modular rotating machinery can be installed in a distributed manner according to the installation environment to make full use of space and improve space utilization rate. Compared with the existing power system, this distributed power system can adapt to power fluctuations without a energy storage system. By changing the number of operating machine tools and adjusting the flow rate in real time according to the system load change, a high-efficiency operation range can be maintained. Each machine tool responds independently, and the overall response speed is fast. Without setting an energy storage system, the system cost, system complexity, and overall volume of the system can be reduced, the maintenance workload is reduced, and the energy conversion process is reduced, thereby reducing system losses.

[0031] In addition to the purposes, features, and advantages described above, the present invention has other purposes, features, and advantages. The present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0033] Figure 1 is the structural principle of the preferred embodiment of the present invention Figure 1 ;

[0034] Figure 2 is the structural principle of the preferred embodiment of the present invention Figure 2 ;

[0035] Figure 3 is the structural schematic diagram of Embodiment 1 of the present invention;

[0036] Figure 4 is the structural schematic diagram of Embodiment 2 of the present invention;

[0037] Figure 5 is the structural schematic diagram of Embodiment 3 of the present invention;

[0038] Figure 6 is the structural schematic diagram of Embodiment 4 of the present invention;

[0039] Figure 7 is the structural schematic diagram of Embodiment 5 of the present invention;

[0040] Figure 8 It is the structural schematic diagram of Embodiment 6 of the present invention;

[0041] 1. Boosting units 10 - 14, water pumps 15 - 19, compressors 2, output units 20 - 24, steam turbines 3, heat exchanger module 31, condensers 32, regenerators 33, heaters 34, precoolers 4, first valves 5, second valves 6, storage devices. Specific embodiments

[0042] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0043] Referring to Figures 1 to 2 , a preferred embodiment of the present invention provides a distributed power system, including a boosting device and an output device,

[0044] The boosting device includes multiple groups of boosting units 1 arranged in parallel, which are used to boost the power cycle medium of the distributed power system;

[0045] The output device includes a group of output units 2 or multiple groups of output units 2 arranged in parallel, which are used to convert the thermal energy of the power cycle medium into electrical energy for output or convert it into mechanical energy for output;

[0046] Among them, both the boosting units 1 and the output units 2 are small - power - level rotating machines produced modularly, such as compressors, core engines, steam turbines, expanders, etc.; the output units 2 can be set in one group or multiple groups. For example, in a thermal power station, multiple groups of output units 2 can output power, and for another example, the propulsion propeller of a ship only needs to be coaxially arranged with one output unit 2;

[0047] It further includes a heat exchanger module 3, which is connected to each boosting unit 1 and each output unit 2 through pipelines respectively. The heat exchanger module 3 is used to heat up the power cycle medium input to the output device, and the heat exchanger module 3 is also used to recycle the thermal energy of the power cycle medium;

[0048] The heat exchanger module 3 simultaneously serves as a heat input, inputting heat energy into the system so that the output device can obtain sufficient heat energy and convert it into mechanical energy or electrical energy; at the same time, after the power cycle medium does work in the output device and continues to be put into the cycle, the waste heat of the power cycle medium at the outlet end of the output device can be used to provide heat energy for the low - temperature and to - be - heated power cycle medium in the system, making full use of energy;

[0049] It further includes a first control device, which is used to control the flow rate and on - off of the pipeline between the heat exchanger module 3 and the input end of each boosting unit 1, and thus adjust the output power of the distributed power system;

[0050] It further includes a second control device for controlling the flow rate and on / off of the pipeline between the heat exchanger module 3 and the input ends of each output unit 2, thereby adjusting the output power of the distributed power system.

[0051] The working principle of this distributed power system: When the load of the distributed power system is at the highest value under the current system conditions, the output power of the system is at the highest value, and the pipeline flow rates at the corresponding positions of the first control device and the second control device are opened to the maximum; that is, the booster unit 1 and the output unit 2 both operate at the maximum state; the booster unit 1 pressurizes the power cycle medium in the cycle and inputs it into the heat exchanger module 3 for heating up. The output unit 2 receives the high-temperature and high-pressure power cycle medium output by the heat exchanger module 3 to do work, converting thermal energy into mechanical energy or electrical energy for output; the power cycle medium after the output unit 2 does work continues to be input into the cycle, and its waste heat is used to assist in heating up the power cycle medium to be heated in the heat exchanger module 3.

[0052] When the system load decreases, the flow rates of the pipelines at the corresponding positions are adjusted through the first control device and the second control device, and then the rotational speeds of each booster unit 1 and each output unit 2 are adjusted to adjust the output power of the distributed power system.

[0053] When the system load further decreases, the required power decreases. If the flow rates / rotational speeds of the booster unit 1 and the output unit 2 are further reduced, it will cause the rotary machinery module to deviate from the optimal operating condition range, resulting in a decrease in output efficiency. Based on this, at least one booster unit 1 is shut down by closing some of the pipeline positions corresponding to the first control device, and the flow rate of the booster unit 1 at the positions where the pipeline is not closed is adjusted (for example, appropriately increasing the flow rate to make the total output power of the system tend to be the total output power before shutting down one booster unit 1). At the same time, if there are multiple output units 2, at least one output unit 2 is synchronously shut down and the flow rates of the remaining output units 2 are adjusted. If there is only one output unit 2, the flow rate is correspondingly reduced through the second control device, so that the booster unit 1 and the output unit 2 are in the optimal operating condition area, and the power generation cycle system works at the optimal efficiency state; the working principle when the system load increases is the same.

[0054] This distributed power system can be applied to fields such as thermal power plants, ships, special vehicles, and aviation. By distributing the power sources and adopting small-power-level rotating machinery with multiple sets of booster units 1 and one or more sets of output units 2, module batch production can be achieved, significantly reducing the development cycle and production cost of large rotating equipment. At the same time, the difficulty and cost of maintenance and repair are reduced, and it has stronger scalability to meet the requirements of cyclic power upgrade. Based on this, different numbers of rotating machinery modules can be selected according to different application scenarios to flexibly and quickly match different output power requirements, and the modular rotating machinery can be installed in a distributed manner according to the installation environment to improve space utilization. Compared with the existing power system, this distributed power system can adapt to power fluctuations without a energy storage system. By changing the number of operating machine tools and adjusting the flow rate in real time according to the system load change, a high-efficiency operating range can be maintained. Each machine tool responds independently, and the overall response speed is fast. Without setting an energy storage system, the system cost, system complexity, and overall volume of the system can be reduced, the maintenance workload can be reduced, and the energy conversion process can be reduced to lower the system loss.

[0055] In this embodiment, the heat exchanger module 3 includes a storage device 6 for storing the power cycle medium of the heat exchanger module 3, where the power cycle medium is determined according to the actual application scenario of the distributed power system, such as the water medium in the steam Rankine cycle, the carbon dioxide gas medium in the Brayton cycle, etc.

[0056] Specifically, a third control device is provided at the outlet end and / or inlet end of the storage device 6, and the third control device is respectively used to adjust the inlet flow rate and the outlet flow rate of the storage device 6 to adjust the total circulation flow rate of the distributed power system, and thus can cooperate with the first control device and the second control device to jointly control the output power and output efficiency of the distributed power system.

[0057] In this embodiment, the first control device includes first valves 4 respectively provided on the pipelines from the heat exchanger module 3 to the inlets of each booster device; the second control device includes second valves 5 respectively provided on the pipelines from the heat exchanger module 3 to the inlets of each output device; the third control device includes a third valve provided at the inlet end of the storage device 6 and a fourth valve provided at the outlet end of the storage device 6.

[0058] Furthermore, each valve can be an electrically controlled valve; the distributed power system further includes a control module for respectively controlling the first valve 4, the second valve 5, the third valve, and the fourth valve according to the load of the distributed power system to adjust the output power of the distributed power system. The control module can be a control panel with buttons and / or a visual operation interface, which is electrically connected to each valve, and can respectively and precisely control each valve in real time according to the system load change to adjust the system output power, making it more intelligent.

[0059] On the other hand, the present preferred embodiment further provides a control method for controlling the above-mentioned distributed power system. The control method includes:

[0060] If the load of the distributed power system increases, the number of opened pipelines at the corresponding position is increased and / or the pipeline flow rate is adjusted through the first regulating device, and the number of opened pipelines at the corresponding position is increased and / or the pipeline flow rate is adjusted through the second regulating device according to the number of opened pipelines and the pipeline flow rate at the corresponding position of the first regulating device;

[0061] If the load of the distributed power system decreases, the number of opened pipelines at the corresponding position is decreased and / or the pipeline flow rate is adjusted through the first regulating device, and the number of opened pipelines at the corresponding position is decreased and / or the pipeline flow rate is adjusted through the second regulating device according to the number of opened pipelines and the pipeline flow rate at the corresponding position of the first regulating device. It can be understood that when the system load decreases, the flow rates at the inlet and outlet ends of the gas storage tank are simultaneously reduced;

[0062] Furthermore, the above control method may specifically be:

[0063] If the load of the distributed power system is in the maximum power state, the booster unit 1 and the output unit 2 operate at the maximum state;

[0064] If the load of the distributed power system decreases and the output efficiency of the distributed power system is within the optimal operating range, the pipeline flow rate at the corresponding position is reduced through the first valve 4, and the pipeline flow rate at the corresponding position is reduced through the second valve 5;

[0065] If the load of the distributed power system decreases and the output efficiency of the distributed power system deviates from the optimal operating range, that is, when the system load further decreases and the required power decreases, if the flow rates / rotational speeds of the booster unit 1 and the output unit 2 are further reduced, it will cause the rotating machinery module to deviate from the optimal operating range and result in a decrease in output efficiency. At this time, the number of opened pipelines is reduced through the first valve 4 and the pipeline flow rate at the opened positions of other pipelines is adjusted through the first valve 4, that is, some pipelines at corresponding positions are closed through the first valve 4 to shut down at least one booster unit 1 and the flow rate of the booster unit 1 at the unclosed positions of the pipelines is adjusted (for example, the flow rate is appropriately increased to make the total output power of the system tend to be the total output power before shutting down one booster unit 1). The number of opened pipelines at the corresponding position is adjusted and / or the pipeline flow rate is adjusted through the second valve 5 so that the load of the distributed power system is within the optimal operating range. It can be understood that if there are multiple output units 2, at least one output unit 2 is simultaneously shut down and the flow rates of the remaining output units 2 are adjusted. If there is only one output unit 2, the flow rate is correspondingly reduced through the second valve 5, so that the booster unit 1 and the output unit 2 are in the optimal operating area and the power generation cycle system operates at the best efficiency state;

[0066] The working principle is the same when the system load increases from the minimum load state (minimum output power state).

[0067] Embodiment 1

[0068] The energy system of this embodiment, as Figure 3 shown, is set based on the distributed power system and the steam Rankine cycle principle of the preferred embodiment of the present invention. The power cycle medium is water. The heat exchanger module 3 includes a condenser 31, a regenerator 32, and a heater 33. The condenser 31 is used to condense gaseous water into liquid water and then input it to each booster unit 1. The heater 33 is used to heat the liquid water into superheated steam and then input it to each output unit 2 to do work. The regenerator 32 has a high-temperature side and a low-temperature side. The high-temperature side is used to collect the water after doing work at the outlet end of each output unit 2, cool it, and output it to the condenser 31 for recycling. The low-temperature side is used to collect the water at the outlet end of the booster unit 1, use the waste heat of the high-temperature side to raise the temperature, and then output it to the heater 33 for recycling.

[0069] In this embodiment, the booster unit 1 is a water pump, including multiple groups of water pumps ( Figure 3 labeled 10 - 14 as shown); the output unit 2 includes a steam turbine ( Figure 3 labeled 20 - 24 as shown) and a generator coaxially arranged, and multiple groups of output units 2 are provided; the steam turbine does work to generate electricity by the generator;

[0070] When the system requires the maximum power, all water pumps and steam turbines operate at the maximum state. The gas storage tank is used to adjust the total circulation flow. When the power demand starts to decrease (for example, decreases to 80% power load), the flow / rotation speed of the water pump and the steam turbine is adjusted. When the power demand continues to decrease (such as 60% power load), if the flow / rotation speed of the water pump and the steam turbine continues to decrease, it will cause the rotating machinery to deviate from the optimal operating condition area and the cycle efficiency will decrease. At this time, a certain number of water pumps and the steam turbine generators in the same group are shut down according to the power demand to ensure that the working water pumps and steam turbines are in the optimal efficiency range, so as to achieve a relatively high cycle efficiency at different power demands. When the power demand starts to increase, just adjust the number of working water pumps and steam turbines, and the flow / rotation speed.

[0071] Embodiment 2

[0072] The energy system of this embodiment, as Figure 4 shown, is different from Embodiment 1 in that the output unit 2 only includes one steam turbine ( Figure 4 labeled 2 as shown), which is suitable for the application environment where the propulsion propeller system of the ship only needs to be driven by a single steam turbine;

[0073] When the maximum power of the ship's power is required, all water pumps and steam turbines operate at their maximum states. The gas storage tank is used to adjust the total circulation flow rate. When the power demand begins to decrease (for example, drops to 80% power load), the flow rate / rotation speed of the water pumps and steam turbines is adjusted. When the power demand continues to decrease (such as 60% power load), if the flow rate / rotation speed of the water pumps and steam turbines is further reduced, it will cause the rotating machinery to deviate from the optimal operating condition area and the cycle efficiency will decrease. At this time, a certain number of water pumps are shut down according to the power demand to ensure that the working water pumps and steam turbines are in the optimal efficiency range, so as to achieve a relatively high cycle efficiency at different power demands. When the power demand begins to increase, the number of working water pumps, the flow rate / rotation speed of the water pumps, and the flow rate / rotation speed of the steam turbines can be adjusted.

[0074] Embodiment III

[0075] The energy system of this embodiment, as Figure 5 shown, is set based on the distributed power system and Brayton cycle principle of the preferred embodiment of the present invention. The power cycle medium is carbon dioxide gas. The heat exchanger module 3 includes a precooler 34, a regenerator 32, and a heater 33. The precooler 34 is used to cool the carbon dioxide and then input it to each booster unit 1. The heater 33 is used to heat the carbon dioxide and then input it to each output unit 2 to do work. The regenerator 32 has a high-temperature side and a low-temperature side. The high-temperature side is used to collect the carbon dioxide after doing work at the outlet end of each output unit 2, cool it and output it to the precooler 34 to participate in the cycle. The low-temperature side is used to collect the carbon dioxide at the outlet end of each booster unit 1, use the waste heat of the high-temperature side to heat it up and then output it to the heater 33 to participate in the cycle.

[0076] In this embodiment, the booster unit 1 is a compressor ( Figure 5 labeled 15-19 as shown), and the output unit 2 is a turbine expander and a generator arranged coaxially. There are multiple groups of booster units 1 and multiple groups of output units 2;

[0077] The working principle refers to the preferred embodiment of the present invention.

[0078] Embodiment IV

[0079] The energy system of this embodiment, as Figure 6 shown, is different from Embodiment III in that the booster unit 1 is a core engine. The core engine is composed of a compressor and a first turbine expander connected coaxially. The first turbine expander in the core engine drives the compressor. The output unit 2 includes a second turbine expander and a generator arranged coaxially. There are multiple groups of booster units 1 and multiple groups of output units 2. The control method and effect of the working principle are not elaborated herein.

[0080] Embodiment V

[0081] The energy system of this embodiment, as Figure 7As shown, the difference from Embodiment 3 is that the booster unit 1 is a core engine, which consists of a compressor and a first turbine expander connected coaxially. The compressor is driven by the first turbine expander in the core engine, and the output unit 2 includes a second turbine expander. There are multiple groups of booster units 1 and one group of output units 2, which are adapted to an application environment that can only adopt single output. The working principle, control method, and effects are not elaborated here.

[0082] Embodiment 6

[0083] The energy system of this embodiment, as Figure 8 shown, the difference from Embodiment 3 is that the booster unit 1 is a compressor and the output unit 2 is a turbine expander. There are multiple groups of booster units 1 and one group of output units 2, which are adapted to an application environment that can only adopt single output. The working principle, control method, and effects are not elaborated here.

[0084] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. 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.

Claims

1. A distributed power system, characterized in that, It includes a supercharging device and an output device. The supercharging device includes multiple groups of supercharging units (1) arranged in parallel, which are used to supercharge the power cycle medium of the distributed power system; the output device includes a group of output units (2) or multiple groups of output units (2) arranged in parallel, which are used to convert the thermal energy of the power cycle medium into electrical energy for output or convert it into mechanical energy for output. It further includes a heat exchanger module (3), which is connected to each of the supercharging units (1) and each of the output units (2) through pipelines. The heat exchanger module (3) is used to heat up the power cycle medium input to the output device, and the heat exchanger module (3) is also used to recycle the thermal energy of the power cycle medium. It further includes a first regulating device, which is used to control the flow rate and on / off of the pipelines between the heat exchanger module (3) and the input ends of each of the supercharging units (1), so as to adjust the output power of the distributed power system. It further includes a second regulating device, which is used to control the flow rate and on / off of the pipelines between the heat exchanger module (3) and the input ends of each of the output units (2), so as to adjust the output power of the distributed power system.

2. The distributed power system according to claim 1, wherein The heat exchanger module (3) includes a storage device (6), which is used to store the circulating medium of the power system (3).

3. The distributed power system according to claim 2, wherein A third regulating device is provided at the outlet end and / or the inlet end of the storage device (6). The third regulating device is used to adjust its inlet flow rate and its outlet flow rate, so as to adjust the total circulating flow rate of the distributed power system.

4. The distributed power system according to claim 3, characterized in that, The distributed power system further includes a control module, which is used to respectively control the first regulating device, the second regulating device and the third regulating device according to the load of the distributed power system, so as to adjust the output power of the distributed power system.

5. The distributed power system according to claim 3, characterized in that, The first regulating device includes first valves (4) respectively arranged on the pipelines from the heat exchanger module (3) to the inlets of each of the supercharging devices; the second regulating device includes second valves (5) respectively arranged on the pipelines from the heat exchanger module (3) to the inlets of each of the output devices; the third regulating device includes a third valve arranged at the inlet end of the storage device (6) and a fourth valve arranged at the outlet end of the storage device (6).

6. A control method for a distributed power system, characterized in that, The control method is used to control the distributed power system according to any one of claims 1-5. The control method includes: If the load of the distributed power system increases, increase the number of opened pipelines at the corresponding positions and / or adjust the pipeline flow rate through the first regulating device, and increase the number of opened pipelines at the corresponding positions and / or adjust the pipeline flow rate through the second regulating device according to the number of opened pipelines and the pipeline flow rate at the corresponding positions of the first regulating device. If the load of the distributed power system decreases, reduce the number of opened pipelines at the corresponding positions and / or adjust the pipeline flow rate through the first regulating device, and reduce the number of opened pipelines at the corresponding positions and / or adjust the pipeline flow rate through the second regulating device according to the number of opened pipelines and the pipeline flow rate at the corresponding positions of the first regulating device.

7. The control method of the distributed power system according to claim 6, characterized in that, The control method further includes: If the load of the distributed power system is in the maximum power state, the booster unit (1) and the output unit (2) operate in the maximum state; If the load of the distributed power system decreases and the output efficiency of the distributed power system is within the optimal operating range, the pipeline flow rate at the corresponding position is reduced by the first control device, and the pipeline flow rate at the corresponding position is reduced by the second control device; If the load of the distributed power system decreases and the output efficiency of the distributed power system deviates from the optimal operating range, the number of opened pipelines is reduced by the first control device and the pipeline flow rate at the opened positions of other pipelines is adjusted by the first control device. The number of opened pipelines at the corresponding position and / or the pipeline flow rate is adjusted by the second control device so that the load of the distributed power system is within the optimal operating range.

8. An energy system, characterized in that, Based on the distributed power system described in any one of claims 1-5 and the steam Rankine cycle principle, the power cycle medium is water, and the heat exchanger module (3) includes a condenser (31), a regenerator (32), and a heater (33); the condenser (31) is used to condense gaseous water into liquid water and then input it to each booster unit (1), and the heater (33) is used to heat the liquid water into superheated steam and then input it to each output unit (2) for work; the regenerator (32) has a high temperature side and a low temperature side. The high temperature side is used to collect the water after work at the outlet end of each output unit (2), cool it and output it to the condenser (31) for recycling, and the low temperature side is used to collect the water at the outlet end of the booster unit (1) and use the waste heat of the high temperature side to heat it up and then output it to the heater (33) for recycling.

9. The energy system according to claim 8, wherein The booster unit (1) includes a water pump; the output unit (2) includes a steam turbine, or includes a steam turbine and a generator arranged coaxially.

10. An energy system, characterized in that, Based on the distributed power system described in any one of claims 1-5 and the Brayton cycle principle, the power cycle medium is carbon dioxide gas, and the heat exchanger module (3) includes a precooler (34), a regenerator (32), and a heater (33); the precooler (34) is used to cool the carbon dioxide and then input it to each booster unit (1), and the heater (33) is used to heat the carbon dioxide and then input it to each output unit (2) for work; the regenerator (32) has a high temperature side and a low temperature side. The high temperature side is used to collect the carbon dioxide after work at the outlet end of each output unit (2), cool it and output it to the precooler (34) for recycling, and the low temperature side is used to collect the carbon dioxide at the outlet end of each booster unit (1) and use the waste heat of the high temperature side to heat it up and then output it to the heater (33) for recycling.

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