A kind of hoisting type micro gas turbine and system based on new energy

Abstract

The present invention relates to the field of renewable energy power generation technology, and in particular to a hoisted micro gas turbine and system based on renewable energy, comprising a main support frame, wherein both bottom ends of the main support frame are provided with bottom feet supported on the ground, a hoisting structure embedded in a reserved pit on the ground is provided below the main support frame, a micro gas turbine is provided at the bottom of the hoisting structure, a fossil crushing mechanism is provided on one side of the micro gas turbine, and a photovoltaic component is provided between the hoisting structure and the main support frame. The present invention adopts fossil energy as fuel, and crushes the fossil fuel into powder through a fossil crushing mechanism so that it can be fully burned, thereby avoiding toxic gases generated by incomplete combustion of the fossil fuel from polluting the environment, and secondly, photovoltaic power generation is used as the starting power for the main motor of the micro gas turbine and the crushing motor of the fossil crushing mechanism, thereby truly realizing zero-energy starting.

Description

Technical Field

[0001] The present invention relates to the technical field of renewable energy power generation, and in particular to a hoisted micro gas turbine and system based on renewable energy. Background Art

[0002] In recent years, distributed power technology has attracted more and more attention due to its unique environmental protection and economy. Distributed power sources in microgrids include: micro gas turbines, fuel cells, photovoltaic power generation, wind power generation, internal combustion engines and various energy storage devices. Among them, micro gas turbines can realize the combined supply of cold, heat and electricity by utilizing the waste heat of power generation, thereby improving the utilization efficiency of primary energy. If micro gas turbines can be arranged according to the location of cold and hot loads, the cost of laying pipelines can be reduced, the heat loss can be reduced, and the economic benefits can be improved. In the prior art, the fuel selection of micro gas turbines has always been the object of research due to the lack of energy. Fossil energy is one of the options, but after incomplete combustion, it will emit toxic gases, so it has always been controversial as a fuel for gas turbines. The disadvantage of gas turbine power generation is that the motor needs to provide the starting torque to start the gas turbine for power generation before power generation. Therefore, the proposal of a hoisting micro gas turbine and system based on new energy is particularly important. Summary of the invention

[0003] The purpose of the present invention is to provide a suspended micro gas turbine and system based on new energy to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned objectives, on the one hand, the present invention provides the following technical solutions: a hoisted micro gas turbine based on new energy, comprising a main support frame, the main support frame being an inverted "U"-shaped structure, and having two feet at the bottom end of the main support frame, each of which is supported on the ground; a hoisting structure embedded in a reserved pit on the ground is provided below the main support frame, a micro gas turbine is provided at the bottom of the hoisting structure, a fossil crushing mechanism for conveying fossil fuels is provided on one side of the micro gas turbine, and a photovoltaic component is provided between the hoisting structure and the main support frame to provide starting power for the fossil crushing mechanism and the micro gas turbine.

[0005] Preferably, the micro gas turbine includes a compressor casing and a combustion chamber casing located on the same axis, and a pipe is spirally wrapped around the outside of the compressor casing and the combustion chamber casing, one end of the pipe is connected to the compressor casing, and the other end of the pipe is connected to the combustion chamber casing, and an igniter and an air supply pipe are provided on the pipe at one end close to the combustion chamber casing, and the air supply pipe is located between the igniter and the combustion chamber casing.

[0006] Preferably, an annular compression chamber is provided inside the compressor casing, a compressor main shaft is provided on the central axis of the compressor casing, the compressor main shaft penetrates into the compression chamber and an impeller is coaxially sleeved at the center of the compression chamber, a combustion chamber is provided in the combustion chamber casing, a combustion chamber main shaft is provided on the central axis of the combustion chamber casing, the combustion chamber main shaft penetrates into the combustion chamber and a turbine is coaxially sleeved at the front of the combustion chamber, a gas inlet connected to a pipeline is also provided in the combustion chamber, and a fuel powder inlet is provided at the end of the combustion chamber casing.

[0007] Preferably, the fossil crushing mechanism includes a fuel feed hopper, which is an arc-shaped slope structure, and the oblique lower end of the fuel feed hopper is connected to the fuel powder inlet and communicates with the combustion chamber. A crushing chamber is provided on the top of the fuel feed hopper, and a silo is provided on the top of the crushing chamber. The silo is a hollow structure with an opening at the top, and a fixed plate is provided at the top center of the silo, and a crushing motor is installed on the fixed plate. The crushing chamber is a hollow truncated cone structure, and a crushing roller is provided in the crushing chamber. The crushing roller has the same shape as the crushing chamber, and the diameter of the crushing roller is smaller than the diameter of the crushing chamber. The output shaft of the crushing motor passes through the fixed plate and is eccentrically connected to the crushing roller. A screen is provided inside the crushing chamber and at the bottom end, and a battery box is provided on the side wall of the silo, and a battery is installed in the battery box.

[0008] Preferably, the photovoltaic assembly includes a photovoltaic cell panel, a hinge seat is transversely provided at the center position of the bottom surface of the photovoltaic cell panel, an axial hole penetrating the hinge seat is transversely opened on the hinge seat, hanging rings are provided on the bottom surface of the photovoltaic cell panel near both ends, a pull rope is bolted to the hanging ring, the pull rope is hung down to a position close to the ground, and a pull ring is provided at the bottom end of the pull rope.

[0009] Preferably, the lifting structure includes a bracket in an inverted "U" shape, a support platform is provided on the top of the bracket, a cross bar is provided on the top of the support platform, a rotating shaft fixing plate is provided at both ends of the top surface of the cross bar, a rotating shaft is connected between the two rotating shaft fixing plates, and the rotating shaft is embedded in the shaft hole and rotatably connected thereto.

[0010] Preferably, the photovoltaic assembly also includes a first inverter and a distribution cabinet, and the battery provides input power to the first inverter. Through the action of the first inverter, direct current is converted into alternating current and transmitted to the distribution cabinet. The switching action of the distribution cabinet supplies power to the main motor of the micro gas turbine and the crushing motor of the fossil crushing mechanism.

[0011] Preferably, pillars are provided on both sides of the bracket, and the pillars are in an inverted "L" shape. A lifting plate is provided at the top of the pillar, and the lifting plate is fixed to the bottom surface of the main support frame by bolts. A first fixing ring and a second fixing ring are respectively provided at the two feet of the bottom end of the bracket, and the first fixing ring is sleeved on the compressor casing, and the second fixing ring is sleeved on the combustion chamber casing. A connecting rod is also provided on the side wall of the bracket, and a third fixing ring is provided at the end of the connecting rod, and the third fixing ring is sleeved outside the silo.

[0012] On the other hand, the present invention also proposes a hoisted micro gas turbine system based on new energy, including a micro gas turbine, a permanent magnet generator, a rectifier, an energy storage device, a PWM inverter, an LC filter, a bus and a feeder. The combustion chamber main shaft of the micro gas turbine drives the permanent magnet generator to generate high-frequency alternating current, which is then rectified by the rectifier and stored in the energy storage device. After being inverted by the PWM inverter, it is connected to the grid and then filtered by the LC filter and distributed to the feeder circuit by the bus.

[0013] Preferably, a PV droop control method is adopted during the inversion process of the PWM inverter to control active output and voltage constancy.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention generates electricity through a hoisted micro gas turbine, placing the entire power generation system underground, saving space and improving safety, and using fossil energy as fuel, crushing the fossil fuel into powder through a fossil crushing mechanism so that it can be fully burned, thereby avoiding toxic gases produced by incomplete combustion of fossil fuels to pollute the environment, and secondly, photovoltaic power generation is used as the starting power for the main motor of the micro gas turbine and the crushing motor of the fossil crushing mechanism, thereby truly realizing zero-energy starting, and secondly, energy storage equipment is used to achieve rapid power balance when the microgrid switches from grid-connected operation to island operation, thereby improving the dynamic response speed of the microgrid and taking into account the equivalence of each gas turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 It is a structural schematic diagram of the hoisting structure in the present invention;

[0017] Figure 3 This is one of the structural schematic diagrams of the micro gas turbine in the present invention;

[0018] Figure 4 This is the second structural schematic diagram of the micro gas turbine in the present invention;

[0019] Figure 5 The third structural schematic diagram of the micro gas turbine in the present invention;

[0020] Figure 6 It is a structural schematic diagram of the fossil crushing mechanism in the present invention;

[0021] Figure 7 is a cross-sectional view of the fossil crushing mechanism of the present invention;

[0022] Figure 8 It is a partial cross-sectional view of the fossil crushing mechanism in the present invention;

[0023] Fig. 9 It is a schematic diagram of the structure of the photovoltaic module in the present invention;

[0024] Fig.10 This is a power supply block diagram of the photovoltaic module in the present invention;

[0025] Fig.11 is a system schematic diagram of the micro gas turbine in the present invention;

[0026] Fig.12 A schematic diagram of the microgrid structure of the micro gas turbine system of the present invention;

[0027] Fig.13 The schematic diagram of inverter control implementation of the micro gas turbine system in the present invention is shown in FIG.

[0028] In the figure: 1. Main support frame; 10. Foot; 2. Micro gas turbine; 20. Compressor housing; 200. Air inlet; 201. Compressor main shaft; 202. Compressor chamber; 203. Impeller; 21. Combustion chamber housing; 210. Combustion chamber; 211. Combustion chamber main shaft; 212. Turbine; 213. Fuel powder inlet; 214. Gas inlet; 22. Pipeline; 220. Ignitor; 221. Air supply pipe; 3. Fossil crushing mechanism; 30. Fuel feed hopper; 31. Crushing chamber; 32. Silo; 320. Fixing plate; 33 , crushing motor; 34, screen; 35, battery box; 36, crushing roller; 37, battery; 4, photovoltaic module; 40, photovoltaic panel; 41, hinge seat; 410, shaft hole; 42, hanging ring; 43, pull rope; 44, pull ring; 45, first inverter; 46, distribution cabinet; 5, lifting structure; 50, bracket; 51, support platform; 52, first fixing ring; 53, second fixing ring; 54, connecting rod; 540, third fixing ring; 55, cross bar; 56, shaft fixing plate; 57, shaft; 58, pillar; 580, lifting plate. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] Embodiment 1:

[0033] A suspended micro gas turbine based on new energy, such as Figure 1-10 As shown, it includes a main support frame 1, which is an inverted "U"-shaped structure. Both feet at the bottom end of the main support frame 1 are provided with base feet 10 supported on the ground. A lifting structure 5 embedded in a reserved pit on the ground is provided below the main support frame 1. A micro gas turbine 2 is provided at the bottom of the lifting structure 5. A fossil crushing mechanism 3 for conveying fossil fuels is provided on one side of the micro gas turbine 2. A photovoltaic component 4 is provided between the lifting structure 5 and the main support frame 1 to provide starting power for the fossil crushing mechanism 3 and the micro gas turbine 2.

[0034] The micro gas turbine 2 includes a compressor casing 20 and a combustion chamber casing 21 located on the same axis. A pipe 22 is spirally wrapped around the outside of the compressor casing 20 and the combustion chamber casing 21. One end of the pipe 22 is connected to the compressor casing 20, and the other end of the pipe 22 is connected to the combustion chamber casing 21. An igniter 220 and an air supply pipe 221 are provided on the pipe 22 and at one end close to the combustion chamber casing 21. The air supply pipe 221 is located between the igniter 220 and the combustion chamber casing 21. An annular compression chamber 202 is provided inside the compressor housing 20, a compressor main shaft 201 is provided on the central axis of the compressor housing 20, the compressor main shaft 201 penetrates into the compression chamber 202 and a coaxial sleeve is provided at the center of the compression chamber 202 with an impeller 203, a combustion chamber 210 is provided inside the combustion chamber housing 21, a combustion chamber main shaft 211 is provided on the central axis of the combustion chamber housing 21, the combustion chamber main shaft 211 penetrates into the combustion chamber 210 and a turbine 212 is coaxially provided at the front of the combustion chamber 210, a gas inlet 214 connected to the pipeline 22 is provided in the combustion chamber 210, and a fuel powder inlet 214 is provided at the end of the combustion chamber housing 21 3. The combustion chamber 210 is also provided with an exhaust port connected to the outside, wherein the combustion chamber main shaft 211 and the compressor main shaft 201 are coaxially connected via a coupling therebetween, and a main motor (not shown in the figure) is used as a starting input power. The high-speed rotating compressor main shaft 201 compresses the air into high-pressure air in the compression chamber 202 through the high-speed rotation of the impeller 203, and transports the air from the pipeline 22 to the combustion chamber 210, and the combustible gas is supplemented from the air supply pipe 221. After the igniter 220 ignites, the fuel is ignited and burned in the combustion chamber 210 to generate high-temperature and high-pressure air; the high-temperature and high-pressure air expands and drives the turbine 212 to rotate and do work; the gas after the work is discharged from the exhaust port.

[0035] The exhaust temperature equation and torque equation are:

[0036] f 1 =T R -700(1-W f )+550(1-ω)

[0037] f 2 =1.3(W f -0.23)+0.5(1-ω)

[0038] Where: ω is the rotation speed of the turbine 212, W f is the fuel flow signal, T R is the exhaust temperature reference. In this embodiment, T R=950℃, ω is the generator speed. The torque equation is basically accurate under 100% load, and there will be an error of less than 5% in other cases. The exhaust temperature equation is relatively inaccurate, but since the temperature control only works near the temperature reference value, its influence can be ignored.

[0039] Secondly, the fossil crushing mechanism 3 includes a fuel feed hopper 30, which is an arc-shaped slope structure. The lower oblique end of the fuel feed hopper 30 is connected to the fuel powder inlet 213 and communicates with the combustion chamber 210. The top of the fuel feed hopper 30 is provided with a crushing chamber 31, and the top of the crushing chamber 31 is provided with a silo 32. The bottom end of the silo 32 is a sloping structure with a middle bottom and a high surrounding. The silo 32 is a hollow structure with an opening at the top. A fixed plate 320 is provided at the center of the top of the silo 32. The fixed plate A crushing motor 33 is installed on 320, and the crushing chamber 31 is a hollow truncated cone structure. A crushing roller 36 is arranged in the crushing chamber 31. The crushing roller 36 has the same shape as the crushing chamber 31, and the diameter of the crushing roller 36 is smaller than the diameter of the crushing chamber 31. The output shaft of the crushing motor 33 passes through the fixed plate 320 and is eccentrically connected to the crushing roller 36. A screen 34 is arranged inside the crushing chamber 31 and at the bottom end. A battery box 35 is arranged on the side wall of the silo 32, and a battery 37 is installed in the battery box 35.

[0040] Taking into account the toxic gases produced by incomplete combustion of fossil fuels and in order to avoid environmental pollution, the inventors choose to add a fossil crushing mechanism 3, fill the fossil fuel from the silo 32, and drive the crushing roller 36 to make eccentric movement through the crushing motor 33. The crushing roller 36 rotates eccentrically and continuously squeezes the inner wall of the crushing chamber 31. As the fossil fuel falls, it is crushed into powder. The fossil fuel that meets the particle size requirements falls from the screen 34 to the fuel feed hopper 30 and is continuously added to the combustion chamber 210 from the fuel powder inlet 213 for combustion, forming a cycle.

[0041] In order to solve the problem that the main motor of the micro gas turbine 2 and the crushing motor of the fossil crushing mechanism 3 need a certain amount of electric energy to start, the inventor has specially designed that the photovoltaic assembly 4 provides starting power through solar power generation in order to achieve zero energy consumption starting. The photovoltaic assembly 4 includes a photovoltaic panel 40, a hinge seat 41 is horizontally provided at the center of the bottom surface of the photovoltaic panel 40, and an axial hole 410 that passes through the hinge seat 41 is horizontally opened on the hinge seat 41. A hanging ring 42 is provided near both ends of the bottom surface of the photovoltaic panel 40, and a pull rope 43 is bolted to the hanging ring 42. The pull rope 43 hangs down to a position close to the ground, and a pull ring 44 is provided at the bottom end of the pull rope 43. The hoisting structure 5 includes a bracket 50 in an inverted "U" shape. A support platform 51 is provided on the top of the bracket 50, and a cross bar 55 is provided on the top of the support platform 51. A rotating shaft fixing piece 56 is provided at both ends of the top surface of the cross bar 55. A rotating shaft 57 is connected between the two rotating shaft fixing pieces 56. The rotating shaft 57 is embedded in the shaft hole 410 and is rotatably connected thereto. The photovoltaic assembly 4 also includes a first inverter 45 and a distribution cabinet 46. The battery 37 provides input power for the first inverter 45. Through the action of the first inverter 45, direct current is converted into alternating current and transmitted to the distribution cabinet 46. The switching action of the distribution cabinet 46 supplies power to the main motor of the micro gas turbine 2 and the crushing motor 33 of the fossil crushing mechanism 3 to start them. The staff can pull the pull rings 44 at both ends to drive the hinge seat 41 of the photovoltaic panel 40 to rotate on the shaft 57 to adjust the angle of the photovoltaic panel 40 to ensure that the received light energy is maximized.

[0042] In addition, pillars 58 are provided on both sides of the bracket 50, and the pillars 58 are in an inverted "L" shape. A lifting plate 580 is provided at the top of the pillar 58, and the lifting plate 580 is fixed to the bottom surface of the main support frame 1 by bolts. The first fixing ring 52 and the second fixing ring 53 are respectively provided at the two feet of the bottom end of the bracket 50. The first fixing ring 52 is sleeved on the compressor casing 20, and the second fixing ring 53 is sleeved on the combustion chamber casing 21. A connecting rod 54 is also provided on the side wall of the bracket 50, and a third fixing ring 540 is provided at the end of the connecting rod 54, and the third fixing ring 540 is sleeved outside the silo 32. The micro gas turbine 2 is effectively fixed by the first fixing ring 52, the second fixing ring 53 and the third fixing ring 540.

[0043] Embodiment 2:

[0044] In the second embodiment of the present invention, a suspended micro gas turbine system based on new energy is disclosed, including a micro gas turbine 2, a permanent magnet generator, a rectifier, an energy storage device, a PWM inverter, an LC filter, a bus and a feeder. The combustion chamber main shaft 211 of the micro gas turbine 2 drives the permanent magnet generator to generate high-frequency alternating current, which is then rectified by the rectifier and stored in the energy storage device, inverted by the PWM inverter and connected to the grid, and then filtered by the LC filter and distributed to the feeder circuit by the bus.

[0045] It includes a micro gas turbine 2, a permanent magnet generator, a rectifier, an energy storage device, a PWM inverter, an LC filter, a bus and a feeder. The combustion chamber main shaft 211 of the micro gas turbine 2 drives the permanent magnet generator to generate high-frequency alternating current, which is then rectified by the rectifier and stored in the energy storage device. It is inverted by the PWM inverter and connected to the grid, and then filtered by the LC filter and distributed to the feeder circuit by the bus.

[0046] In order to achieve rapid power balance when the microgrid switches from grid-connected operation to islanded operation, improve the dynamic response speed of the microgrid, and consider the equivalence of each gas turbine, this embodiment installs energy storage equipment on the DC side of each gas turbine power generation system, and the grid-connected inverter adopts a current-controlled voltage source inverter based on pulse width modulation.

[0047] This embodiment uses two micro gas turbines 2, the power of DG1 is 1.35MW, the power of DG2 is 1.835MW, and the outlet voltage is 10.5kV. The 10kV line parameters are: R = 0.325Ω / km, X = 0.273Ω / km. Under the premise of considering safety and reliability, a comprehensive economic benefit analysis is conducted and a single busbar wiring scheme is selected. The structure diagram is shown in the figure. Fig.12 As shown, specifically, in order to realize the characteristic of "heat-to-power" of the micro gas turbine 2, the PV control method is adopted when the two gas turbines are connected and operated, that is, the active power output and voltage are controlled to be constant. When the island is operated, the power exchange and reference frequency and voltage of the main distribution network are lost, and each micro gas turbine needs to be effectively coordinated and controlled. This embodiment adopts a peer-to-peer control method based on the P / f (active power / frequency) and Q / V (reactive power / voltage) droop characteristics, such as Fig.13 As shown in the figure, P 0 is DG at rated angular frequency ω 0 Active output at time, E req is the external voltage amplitude, E 0 is the required inverter output voltage amplitude.

[0048] When connected to the grid, the inverter controls the active output and local voltage amplitude to the specified values ​​Pref and Uref. The measured values ​​of P and U are compared with the specified reference values, and the error part is output as the amplitude M and phase angle θ of the inverter reference voltage through the proportional integral (PI) link. When the microgrid is connected to the grid, there is power exchange with the main distribution network. When the microgrid is islanded, the micro gas turbine 2 must redistribute the output through inverter control to make it equivalent to the load demand. According to Fig.11 Calculated by formula (1):

[0049]

[0050] Where X is the port filter L of the inverter f , C f and filter inductor L c The equivalent reactance value of p For U inv The angle between E.

[0051] When connected to the network, at rated frequency ω 0 , the output of steam turbine DG1 and DG2 are P 01 With P 02 When the island is operating, the frequency decreases or increases according to whether the power exchange between the microgrid and the main distribution network is input or output, resulting in a change in the power angle between the power sources, and the output of each gas turbine is redistributed to achieve the same level as the load demand. At this time, the microgrid frequency ω changes to a lower value and stabilizes to the value in formula (2). The calculation of the active droop gain mP is as shown in formula (3), that is,

[0052] ω=ω 0 -mP(P 0i -P i ) (2)

[0053]

[0054] Where, P 0i DGi at rated frequency ω 0 The active output at the time; min is the minimum permissible frequency; P max is the maximum rated power of DG.

[0055] Considering that the slow dynamic response speed of micro gas turbine 2 may cause voltage and frequency deviation, in order to ensure the rapidity of power response, energy storage equipment is installed on the DC side of each micro gas turbine 2.

[0056] When the load increases, the gas turbine increases its active output under the control of the inverter, and the i-th unit reaches the maximum rated output Pi max When the load continues to increase, the gas turbine output power stabilizes at Pi max , but the inverter capacity is generally larger than Pi max (The inverter needs to deliver both active and reactive power at the same time), and without additional control, there is no ability to keep the output at Pi max , which may cause the DC side energy storage device to be over-discharged and damaged; on the contrary, when the load decreases, the gas turbine reduces the active output, and the i-th unit reaches 0, but the inverter power can flow in both directions, which may cause the DC side energy storage device to be overcharged. To avoid this situation, an output power limitation link is added to the inverter active control part. The final active frequency output characteristic is shown in formula (4).

[0057] ω=ω 0 -mp(P 0i -P i )+Δω + +Δω - (4)

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A suspended micro gas turbine based on new energy, comprising a main support frame (1), characterized in that: The main support frame (1) is an inverted "U"-shaped structure, and base feet (10) supported on the ground are provided at both ends of the bottom of the main support frame (1). A hanging structure (5) embedded in a reserved pit on the ground is provided below the main support frame (1). A micro gas turbine (2) is provided at the bottom of the hanging structure (5), and a fossil crushing mechanism (3) for conveying fossil fuel is provided on one side of the micro gas turbine (2). A photovoltaic module (4) is provided between the hanging structure (5) and the main support frame (1) to provide starting power for the fossil crushing mechanism (3) and the micro gas turbine (2); The micro gas turbine (2) comprises a compressor casing (20) and a combustion chamber casing (21) located on the same axis, a pipe (22) is spirally wound around the outside of the compressor casing (20) and the combustion chamber casing (21), one end of the pipe (22) is connected to the compressor casing (20), and the other end of the pipe (22) is connected to the combustion chamber casing (21), an igniter (220) and an air supply pipe (221) are provided on the pipe (22) and at one end close to the combustion chamber casing (21), and the air supply pipe (221) is located between the igniter (220) and the combustion chamber casing (21); an annular compression chamber (202) is provided inside the compressor casing (20), and the compression chamber (202) is provided with a plurality of air supply pipes (221) and a plurality of air supply pipes (221) are provided. A compressor main shaft (201) is arranged on the central axis of the casing (20), the compressor main shaft (201) penetrates into the compression chamber (202) and a impeller (203) is coaxially sleeved at the center of the compression chamber (202), a combustion chamber (210) is arranged in the combustion chamber casing (21), a combustion chamber main shaft (211) is arranged on the central axis of the combustion chamber casing (21), the combustion chamber main shaft (211) penetrates into the combustion chamber (210) and a turbine (212) is coaxially sleeved at the front of the combustion chamber (210), a gas inlet (214) connected to the pipeline (22) is also arranged in the combustion chamber (210), and a fuel powder inlet (213) is arranged at the end of the combustion chamber casing (21); The micro gas turbine (2) comprises a permanent magnet generator, a rectifier, an energy storage device, a PWM inverter, an LC filter, a busbar and a feeder. The combustion chamber main shaft (211) of the micro gas turbine (2) drives the permanent magnet generator to generate high-frequency alternating current, which is then rectified by the rectifier and stored in the energy storage device. After being inverted by the PWM inverter, the alternating current is connected to the grid for operation, and after being filtered by the LC filter, the alternating current is distributed to the feeder circuit by the busbar.

2. The new energy-based suspended micro gas turbine according to claim 1 is characterized in that: The fossil crushing mechanism (3) comprises a fuel feed hopper (30), the fuel feed hopper (30) is an arc-shaped slope structure, the oblique lower end of the fuel feed hopper (30) is connected to the fuel powder inlet (213) and communicates with the combustion chamber (210), the top of the fuel feed hopper (30) is provided with a crushing chamber (31), the top of the crushing chamber (31) is provided with a silo (32), the silo (32) is a hollow structure with an opening at the top, a fixing plate (320) is provided at the center of the top of the silo (32), and a crushing motor (33) is installed on the fixing plate (320), The crushing chamber (31) is a hollow truncated cone structure. A crushing roller (36) is arranged in the crushing chamber (31). The crushing roller (36) has the same shape as the crushing chamber (31), and the diameter of the crushing roller (36) is smaller than the diameter of the crushing chamber (31). The output shaft of the crushing motor (33) passes through a fixed plate (320) and is eccentrically connected to the crushing roller (36). A screen (34) is arranged inside the crushing chamber (31) and at the bottom end. A battery box (35) is arranged on the side wall of the silo (32), and a storage battery (37) is installed in the battery box (35).

3. The new energy-based suspended micro gas turbine according to claim 2 is characterized in that: The photovoltaic assembly (4) comprises a photovoltaic cell panel (40), a hinge seat (41) is transversely arranged at the center position of the bottom surface of the photovoltaic cell panel (40), an axial hole (410) penetrating the hinge seat (41) is transversely opened on the hinge seat (41), and hanging rings (42) are arranged near both ends of the bottom surface of the photovoltaic cell panel (40), a pull rope (43) is bolted to the hanging ring (42), the pull rope (43) hangs down to a position close to the ground, and a pull ring (44) is arranged at the bottom end of the pull rope (43).

4. The new energy-based suspended micro gas turbine according to claim 3 is characterized in that: The hoisting structure (5) comprises a bracket (50) in an inverted "U"-shaped structure, a support platform (51) is provided on the top of the bracket (50), a cross bar (55) is provided on the top of the support platform (51), a rotating shaft fixing piece (56) is provided at both ends of the top surface of the cross bar (55), a rotating shaft (57) is connected between the two rotating shaft fixing pieces (56), and the rotating shaft (57) is embedded in the shaft hole (410) and is rotatably connected thereto.

5. The new energy-based suspended micro gas turbine according to claim 4 is characterized in that: The photovoltaic assembly (4) further comprises a first inverter (45) and a power distribution cabinet (46); the storage battery (37) provides input power to the first inverter (45); the first inverter (45) converts direct current into alternating current and transmits the alternating current to the power distribution cabinet (46); the switching action of the power distribution cabinet (46) supplies power to the main motor of the micro gas turbine (2) and the crushing motor (33) of the fossil crushing mechanism (3).

6. The new energy-based suspended micro gas turbine according to claim 5 is characterized in that: The support (50) is provided with pillars (58) on both sides, and the pillars (58) are in an inverted "L"-shaped structure. A lifting plate (580) is provided at the top of the pillar (58), and the lifting plate (580) is fixed to the bottom surface of the main support frame (1) by bolts. The two feet at the bottom end of the support (50) are respectively provided with a first fixing ring (52) and a second fixing ring (53), the first fixing ring (52) is sleeved on the compressor casing (20), and the second fixing ring (53) is sleeved on the combustion chamber casing (21). A connecting rod (54) is also provided on the side wall of the support (50), and a third fixing ring (540) is provided at the end of the connecting rod (54), and the third fixing ring (540) is sleeved outside the silo (32).

7. The new energy-based suspended micro gas turbine system according to claim 1 is characterized in that: A PV droop control method is adopted during the inversion process of the PWM inverter to control active output and voltage constancy.

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