A hardware test device and method for a grid-forming energy storage converter

Abstract

The present invention discloses a hardware test device and method for a network-forming energy storage converter, which relates to the technical field of vibration test devices for energy storage converters. A hardware test device for a network-forming energy storage converter includes a base, and further includes: a mounting plate horizontally installed above the base; the mounting plate is connected to the base through two groups of symmetrically distributed elastic adjustment connectors; through four-direction 90° flipping and four damping combination modes, the present invention can simulate horizontal and vertical installations and different damping coupling working conditions to conduct vibration tests on the energy storage converter in all directions, and monitor the working state of the energy storage converter in real time. Through the wire linkage monitoring design, the detection sensitivity of the loosening of the wires of the energy storage converter is improved, and potential failures of the energy storage converter can be detected in advance through vibration tests, further improving the safety of the energy storage converter during use. The elastic adjustment connector adopts a variable damping design, which can increase the vibration test methods compared with the prior art.

Description

Technical Field

[0001] The present invention belongs to the technical field of vibration test devices for energy storage converters, and specifically relates to a hardware test device for a grid-forming energy storage converter. Background Art

[0002] With the large-scale application of renewable energy and energy storage systems, as a core energy conversion device, the reliability of the energy storage converter directly affects the safety of the power grid. The main functions of the energy storage converter include being able to achieve bidirectional conversion between direct current (DC) and alternating current (AC). In the discharge mode, it converts the direct current in the energy storage battery into alternating current for use by households, enterprises, or the power grid; in the charging mode, it converts the alternating current from the power grid or renewable energy (such as photovoltaic) into direct current to charge the battery; it has the monitoring function of parameters such as voltage, current, and frequency to prevent faults such as overcharging, over-discharging, short circuits, and overheating. It has the islanding protection function to prevent accidental power supply to the power grid when the power grid is powered off. In actual operation, the energy storage converter often fails due to mechanical stresses such as transportation vibration (rough mountain roads), installation tilt, and equipment resonance:

[0003] 1. Structural failure: The pins of capacitors break, the magnetic cores of inductors fall off, etc., resulting in changes in the effective values of voltage / current, frequency deviation, harmonic distortion rate, power factor, ripple voltage, and ripple current;

[0004] 2. Connection degradation: Vibration causes the contact resistance of connectors (such as wires) to increase, leading to local overheating and even fire;

[0005] However, the currently commonly used test methods in the industry have significant defects:

[0006] 1. Single test dimension: Traditional vibration tables can only apply single-frequency vibration in the horizontal direction and cannot simulate the real working conditions of equipment tilt and multi-directional composite vibration in actual installation; when the energy storage converter is vertically installed or transported and placed, the fatigue life of the capacitor pins will be reduced under the combined action of gravity and vibration.

[0007] 2. Coarse damping control: Existing devices mostly use fixed-stiffness springs or passive dampers and cannot dynamically adjust the vibration transfer characteristics according to the test orientation;

[0008] 3. Limited monitoring parameters;

[0009] Therefore, a hardware test device for a grid-forming energy storage converter is proposed. Summary of the Invention

[0010] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an energy storage converter hardware test device that can overcome or at least partially solve the above problems.

[0011] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A hardware test device for a network-forming energy storage converter includes a base, and further includes: a mounting plate horizontally installed above the base; the mounting plate is connected to the base through two groups of symmetrically distributed elastic adjustment connectors, and the elastic adjustment connectors are connected to the mounting plate. A vibration motor is installed on the mounting plate to apply a vibration load to the mounting plate; a connecting plate is arranged on the mounting plate, and the energy storage converter is installed on the connecting plate; wherein, at least one side of the connecting plate is angularly flipped on the mounting plate to change the angle between the energy storage converter and the mounting plate; when the connecting plate flips towards one of the groups of elastic adjustment connectors, the damping values of the two groups of elastic adjustment connectors are combined and changed; a parameter monitoring module is used to monitor the electrical energy output value of the energy storage converter in real time during the vibration process.

[0012] Preferably, the combined change of the damping values of the elastic adjustment connectors includes: when the connecting plate flips from the horizontal state towards one of the groups of elastic adjustment connectors, the damping states of the two groups of elastic adjustment connectors are respectively:

[0013] S1. Both groups of elastic adjustment connectors have low damping values;

[0014] S2. Both groups of elastic adjustment connectors have high damping values;

[0015] S3. The group of elastic adjustment connectors close to the flipping position of the connecting plate has a low damping value, and the other group of elastic adjustment connectors has a high damping value;

[0016] S4. The group of elastic adjustment connectors close to the flipping position of the connecting plate has a high damping value, and the other group of elastic adjustment connectors has a low damping value.

[0017] Preferably, four L-shaped pedestals are rectangularly distributed on the mounting plate, the connecting plate is located between the four L-shaped pedestals, angle plates are installed on the bottom surfaces of the four corners of the connecting plate, and multi-faceted holes are formed on both surfaces of the angle plates; Rotating drive members and positioning members are also included on both sides of each side of the connecting plate.

[0018] Preferably, the rotating drive member includes a motor and a first push rod. The first push rod is installed on the mounting plate, the motor is installed on the execution end of the first push rod, and a multi-faceted rod is installed on the output end of the motor. One end of the multi-faceted rod corresponds to the multi-faceted hole.

[0019] Preferably, the positioning member includes a second push rod installed on the mounting plate. A multi-faceted rod is installed on the execution end of the second push rod, and the multi-faceted rod corresponds to the multi-faceted hole on the angle plate.

[0020] Preferably, two first pressing plates and one second pressing plate are respectively arranged on the connecting plate to fix the energy storage converter on the connecting plate.

[0021] Preferably, it further includes first screws respectively installed on the connecting plate corresponding to both ends of the first pressing plate. Both ends of the first pressing plate are sleeved on the two first screws and locked by nuts; it further includes second screws respectively installed on the connecting plate corresponding to both ends of the second pressing plate. Both ends of the second pressing plate are sleeved on the two second screws and locked by nuts.

[0022] Furthermore, a pump oil pipe is installed on the elastic adjustment connecting piece. The pump oil pipe is connected to an oil pump, and a flow meter is installed on the pump oil pipe.

[0023] Furthermore, the wire of the oil pump is connected to the wire on the energy storage converter.

[0024] A hardware testing method for a network-forming energy storage converter includes the following steps:

[0025] S1. Install the energy storage converter on the connecting plate and start the vibration motor;

[0026] S2. When the connecting plate flips from the horizontal state towards one group of elastic adjustment connecting pieces, the damping states of both groups of elastic adjustment connecting pieces are low damping values;

[0027] S3. When the connecting plate flips from the horizontal state towards one group of elastic adjustment connecting pieces, the damping states of both groups of elastic adjustment connecting pieces are high damping values;

[0028] S4. One group of elastic adjustment connecting pieces close to the flipping place of the connecting plate has a low damping value, and the other group of elastic adjustment connecting pieces has a high damping value;

[0029] S5. One group of elastic adjustment connecting pieces close to the flipping place of the connecting plate has a high damping value, and the other group of elastic adjustment connecting pieces has a low damping value.

[0030] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: Through four-direction 90° flipping and four damping combination modes, the present invention can simulate horizontal and vertical installations and different damping coupling working conditions to conduct vibration tests on the energy storage converter in all directions, and real-time monitor the working state of the energy storage converter. Through the wire linkage monitoring design, the detection sensitivity of the loosening of the wires of the energy storage converter is improved, and potential failures of the energy storage converter can be detected in advance through vibration tests, further improving the safety during the use of the energy storage converter. The elastic adjustment connecting piece adopts a variable damping design, which can increase the vibration test methods compared with the prior art. Description of the Drawings

[0031] In the drawings:

[0032] Figure 1 This is a three-dimensional structural schematic diagram of a grid-forming energy storage converter hardware test device proposed by the present invention;

[0033] Figure 2 This is a structural schematic diagram of the angle plate and multi-faceted holes of a grid-forming energy storage converter hardware test device proposed by the present invention;

[0034] Figure 3 This is a structural schematic diagram of the positioning member of a grid-forming energy storage converter hardware test device proposed by the present invention;

[0035] Figure 4 This is a structural schematic diagram of the elastic adjustment connecting member of a grid-forming energy storage converter hardware test device proposed by the present invention;

[0036] Figure 5 This is a top view of a grid-forming energy storage converter hardware test device proposed by the present invention.

[0037] In the figure: 1. Base; 11. Vibration motor; 2. Elastic adjustment connecting member; 21. Guide sleeve; 22. Spring; 23. Guide rod; 3. Mounting plate; 31. Side rotation area 1; 32. Side rotation area 2; 33. Front rotation area 1; 34. Front rotation area 2; 35. L-shaped footrest; 36. Connecting plate; 361. Angle plate; 362. Multi-faceted hole; 37. Rotation driving member; 371. Motor; 372. Push rod 1; 373. Multi-faceted rod 1; 38. Positioning member; 381. Push rod 2; 382. Multi-faceted rod 2; 4. Energy storage converter; 41. Screw rod 1; 42. Pressing plate 1; 43. Screw rod 2; 44. Pressing plate 2. Specific embodiments

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0039] Example 1: Refer to Figures 1-5, a hardware test device for a grid-forming energy storage converter, including a base 1, and also including: a mounting plate 3 horizontally installed above the base 1; the mounting plate 3 is connected to the base 1 through two groups of symmetrically distributed elastic adjustment connectors 2, and the elastic adjustment connector 2 is connected with the mounting plate 3. The elastic adjustment connector 2 includes a guide sleeve 21, a spring 22, and a guide rod 23. The guide rod 23 is slidably connected in the guide sleeve 21. There is an oil cavity in the guide sleeve 21. The spring 22 is connected between the guide sleeve 21 and the guide rod 23. A vibration motor 11 is installed on the mounting plate 3 to apply a vibration load to the mounting plate 3; a connecting plate 36 is arranged on the mounting plate 3, and the energy storage converter 4 is installed on the connecting plate 36; wherein, at least one side of the connecting plate 36 rotates by 0°-90° on the mounting plate 3 to change the angle between the energy storage converter 4 and the mounting plate 3; when the connecting plate 36 rotates towards one of the groups of elastic adjustment connectors 2, the damping values of the two groups of elastic adjustment connectors 2 are combined and changed; a parameter monitoring module is used to monitor the electrical energy output value of the energy storage converter 4 in real time during the vibration process.

[0040] During the test, place the energy storage converter 4 on the connecting plate 36, and use the first pressing plate 42 and the second pressing plate 44 to fixedly install the energy storage converter 4 on the connecting plate 36;

[0041] Insert the first multi-edge rod 373 on all motors 371 into the multi-edge hole 362, and insert the second multi-edge rod 382 on all push rods 381 into the multi-edge hole 362 to realize the restriction of the connecting plate 36;

[0042] Start the vibration motor 11, the mounting plate 3 vibrates, and transmits the vibration force to the energy storage converter 4, so that the energy storage converter 4 works in a vibrating state, and the parameter monitoring module monitors the data on the AC side and the DC side;

[0043] Among them, for the AC side, it is used to monitor the voltage stability. The allowable range of the effective value fluctuation of the voltage is ±5%, the voltage unbalance degree ≤2% (phase voltage difference / average voltage), the frequency deviation is ±0.5 hz, and the total harmonic distortion rate ≤3% (output voltage / current); odd harmonics (3rd, 5th, 7th) ≤1.5%, even harmonics ≤0.5%; the actual power factor ≥0.99 (lagging or leading), and the time required for the voltage to recover to 95% of the steady state when the load changes ≤20 ms;

[0044] DC side monitoring data:

[0045] 1. DC bus voltage fluctuation: allowable range ±2%;

[0046] 2. Voltage ripple, peak-to-peak value ≤2%;

[0047] 3. DC charge and discharge current fluctuation, allowable range ±5%; peak-to-peak value ≤5%;

[0048] 4. Charge and discharge switching time: The time from full-power charging to full-power discharging ≤ 10 ms;

[0049] In addition, for the AC-DC conversion efficiency, the AC→DC charging efficiency: ≥ 97% (full-load condition), and the DC→AC discharging efficiency: ≥ 98% (full-load condition).

[0050] Among them, the parameter monitoring module includes a power quality analyzer, a high-precision oscilloscope, a power analyzer, a digital storage oscilloscope + electronic load, which are used to monitor the AC voltage / THD, DC ripple, conversion efficiency, and dynamic response time respectively.

[0051] When both the voltage fluctuation ≤ ±5% & frequency deviation ≤ ±0.5 Hz are satisfied simultaneously;

[0052] THD ≤ 3% & power factor ≥ 0.99;

[0053] Dynamic response time ≤ 20 ms, then the AC side is qualified;

[0054] When both the voltage fluctuation ≤ ±2% & current fluctuation ≤ ±5% are satisfied simultaneously;

[0055] Voltage / current ripple ≤ 2% / 5%;

[0056] Charge and discharge switching time ≤ 10 ms, then the DC side is qualified.

[0057] When both the AC side and the DC side are qualified, and the two-way conversion efficiency ≥ 97%, then the overall test of the energy storage converter 4 is qualified.

[0058] Example 2: Refer to Figures 1-5 , a grid-forming energy storage converter hardware test device, which is basically the same as that in Example 1. Further, the change in the damping value combination of the elastic adjustment connecting piece 2 includes: when the connecting plate 36 rotates from the horizontal state towards one of the groups of elastic adjustment connecting pieces 2, the damping states of the two groups of elastic adjustment connecting pieces 2 are respectively:

[0059] S1. Both groups of elastic adjustment connecting pieces 2 have low damping values, and the vibration amplitudes at each position of the energy storage converter 4 are the same, which is used to test the influence of the primary vibration on the energy storage converter 4;

[0060] S2. Both groups of elastic adjustment connecting pieces 2 have high damping values. When hydraulic oil is filled into the guide sleeve 21 of the elastic adjustment connecting piece 2, the damping values of both groups of elastic adjustment connecting pieces 2 increase, and the vibration motor 11 further vibrates the energy storage converter 4 at a high frequency, which is used to test the influence of the primary vibration on the energy storage converter 4;

[0061] S3. One set of elastic adjustment connectors 2 near the turning position of the connecting plate 36 has a low damping value, and the other set of elastic adjustment connectors 2 has a high damping value. This enables the energy storage converter 4 at the low damping value to have an increased vertical vibration amplitude during vibration, so as to test the impact of the primary vibration on the energy storage converter 4.

[0062] S4. One set of elastic adjustment connectors 2 near the turning position of the connecting plate 36 has a high damping value, and the other set of elastic adjustment connectors 2 has a low damping value. This increases the vibration frequency of the energy storage converter 4 at the high damping value, and due to the other set having a low damping value, the swinging amplitude of the energy storage converter 4 increases, so as to test the impact of the primary vibration on the energy storage converter 4.

[0063] By changing the damping values of different sets of elastic adjustment connectors 2, the energy storage converter 4 can have different vibration effects when flipping to the first side rotation area 31, the second side rotation area 32, the first front rotation area 33, and the second front rotation area 34, thereby realizing multi-dimensional and multi-damping value vibration tests.

[0064] Four L-shaped pedestals 35 are rectangularly distributed on the mounting plate 3. The connecting plate 36 is located between the four L-shaped pedestals 35. Angle plates 361 are installed on the bottom surfaces of the four corners of the connecting plate 36, and multi-faceted holes 362 are provided on both surfaces of the angle plates 361; It also includes rotation driving members 37 and positioning members 38 on both sides of each side of the connecting plate 36.

[0065] The rotation driving member 37 includes a motor 371 and a first push rod 372. The first push rod 372 is installed on the mounting plate 3, the motor 371 is installed on the execution end of the first push rod 372, and a multi-faceted rod 373 is installed on the output end of the motor 371. One end of the multi-faceted rod 373 corresponds to the multi-faceted hole 362.

[0066] The positioning member 38 includes a second push rod 381 installed on the mounting plate 3. A multi-faceted rod 382 is installed on the execution end of the second push rod 381, and the multi-faceted rod 382 corresponds to the multi-faceted hole 362 on the angle plate 361; The first push rod 372 and the second push rod 381 are hydraulic rods or cylinder rods;

[0067] When the energy storage converter 4 flips to the first side rotation area 31, the second side rotation area 32, the first front rotation area 33, or the second front rotation area 34, the corresponding first push rod 372 is used to push the motor 371 to move, so that one end of the multi-faceted rod 373 is inserted into the multi-faceted hole 362, and one end of the multi-faceted rod 382 at the opposite side of the second push rod 381 is inserted into the multi-faceted hole 362, and the connecting plate 36 is driven to flip by the rotation of the motor 371;

[0068] It should be understood that the multi-faceted rod one 373 and the multi-faceted rod two 382 at other positions both withdraw from the multi-faceted hole 362, cancel the restriction on the connecting plate 36, and the flipping angle is fed back in real time by the encoder.

[0069] Two pressure plates one 42 and one pressure plate two 44 are respectively arranged on the connecting plate 36 to fix the energy storage converter 4 on the connecting plate 36.

[0070] It also includes a screw one 41 installed on the connecting plate 36 corresponding to both ends of the pressure plate one 42. Both ends of the pressure plate one 42 are sleeved on the two screws one 41 and locked by nuts; it also includes a screw two 43 installed on the connecting plate 36 corresponding to both ends of the pressure plate two 44. Both ends of the pressure plate two 44 are sleeved on the two screws two 43 and locked by nuts. It should be understood that the nuts adopt an anti-loosening design to further prevent the energy storage converter 4 from loosening on the connecting plate 36 due to vibration.

[0071] Embodiment 3, a grid-forming energy storage converter hardware test device, is basically the same as Embodiment 2. Further: a pump oil pipe is installed on the elastic adjustment connector 2, the pump oil pipe is connected to an oil pump, and a flow meter is installed on the pump oil pipe;

[0072] By setting the flow meter, after the hydraulic oil is injected into the guide sleeve 21, it can be monitored through the flow meter whether the pump oil pipe still injects oil into the guide sleeve 21, and then used to monitor whether the elastic adjustment connector 2 leaks, so as to avoid the change of the damping value caused by the oil leakage of the elastic adjustment connector 2 and affect the vibration test.

[0073] The wire of the oil pump is electrically connected to the wire on the energy storage converter 4. Vibration can also be used to monitor whether the connecting wires on the energy storage converter 4 are loose. By measuring the resistance in real time, when the contact resistance increases, the wire is loose. In addition, the power supply wire of the oil pump is connected to the wire of the energy storage converter 4. When the wire of the energy storage converter 4 is loose, under the load of the oil pump, the contact resistance further increases to further verify whether the wire on the energy storage converter 4 is loose.

[0074] Embodiment 4: Refer to Figures 1-5 , a grid-forming energy storage converter hardware test method, includes the following steps:

[0075] S1. Install the energy storage converter 4 on the connecting plate 36 and start the vibration motor 11;

[0076] S2. When the connecting plate 36 flips from the horizontal state towards one of the elastic adjustment connectors 2, the damping states of the two elastic adjustment connectors 2 are both low damping values;

[0077] S3. When the connecting plate 36 flips from the horizontal state towards one of the groups of elastic adjusting connectors 2, the damping states of both groups of elastic adjusting connectors 2 are high damping values;

[0078] S4. One group of elastic adjusting connectors 2 close to the flipping position of the connecting plate 36 has a low damping value, and the other group of elastic adjusting connectors 2 has a high damping value;

[0079] S5. One group of elastic adjusting connectors 2 close to the flipping position of the connecting plate 36 has a high damping value, and the other group of elastic adjusting connectors 2 has a low damping value.

[0080] Through four-direction 90° flipping and four damping combination modes, the present invention can simulate horizontal and vertical installations and different damping coupling working conditions, so as to conduct vibration tests on the energy storage converter 4 in all directions, monitor the working state of the energy storage converter 4 in real time, and through the wire linkage monitoring design, improve the detection sensitivity of the loosening of the wires of the energy storage converter 4, be able to discover potential failures of the energy storage converter 4 in advance through vibration tests, further improve the safety during the use of the energy storage converter 4, and the elastic adjusting connector 2 adopts a variable damping design, which can increase the vibration test methods compared with the prior art.

[0081] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the technical content prompted above without departing from the technical solution scope of the present invention. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. A hardware test device for a grid-forming energy storage converter, comprising a base (1), characterized in that, Further included are: A mounting plate (3) horizontally installed above the base (1); The mounting plate (3) is connected to the base (1) through two groups of symmetrically distributed elastic adjustment connectors (2). The elastic adjustment connectors (2) are connected to the mounting plate (3), and a vibration motor (11) is installed on the mounting plate (3) to apply a vibration load to the mounting plate (3); A connecting plate (36) is arranged on the mounting plate (3), and the energy storage converter (4) is installed on the connecting plate (36); Wherein, at least one side of the connecting plate (36) is flipped at an angle of 0° - 90° on the mounting plate (3) to change the angle between the energy storage converter (4) and the mounting plate (3); When the connecting plate (36) is flipped towards one of the groups of elastic adjustment connectors (2), the damping values of the two groups of elastic adjustment connectors (2) are combined and changed; A parameter monitoring module is used to monitor the electric energy output value of the energy storage converter (4) in real time during vibration.

2. The hardware test device for a network-forming energy storage converter according to claim 1, wherein The combined change of the damping values of the elastic adjustment connectors (2) includes: when the connecting plate (36) is flipped from the horizontal state towards one of the groups of elastic adjustment connectors (2), the damping states of the two groups of elastic adjustment connectors (2) are respectively: S1. Both groups of elastic adjustment connectors (2) have low damping values; S2. Both groups of elastic adjustment connectors (2) have high damping values; S3. The group of elastic adjustment connectors (2) close to the flipping position of the connecting plate (36) has a low damping value, and the other group of elastic adjustment connectors (2) has a high damping value; S4. The group of elastic adjustment connectors (2) close to the flipping position of the connecting plate (36) has a high damping value, and the other group of elastic adjustment connectors (2) has a low damping value.

3. The hardware test device for a network-forming energy storage converter according to claim 2, characterized in that Four L-shaped pedestals (35) are rectangularly distributed on the mounting plate (3). The connecting plate (36) is located between the four L-shaped pedestals (35). Angle plates (361) are installed on the bottom surfaces of the four corners of the connecting plate (36), and multi-faceted holes (362) are opened on both surfaces of the angle plates (361); Also included are rotary drive members (37) and positioning members (38) located on both sides of each side of the connecting plate (36).

4. A hardware test device for a network-forming energy storage converter according to claim 3, characterized in that The rotary drive member (37) includes a motor (371) and a first push rod (372). The first push rod (372) is installed on the mounting plate (3), the motor (371) is installed on the execution end of the first push rod (372), a multi-faceted rod (373) is installed on the output end of the motor (371), and one end of the multi-faceted rod (373) corresponds to the multi-faceted hole (362).

5. The hardware test device for a network-forming energy storage converter according to claim 4, characterized in that, The positioning member (38) includes a second push rod (381) installed on the mounting plate (3). A multi-faceted rod (382) is installed on the execution end of the second push rod (381), and the multi-faceted rod (382) corresponds to the multi-faceted hole (362) on the angle plate (361).

6. The hardware test device for a network-forming energy storage converter according to claim 3 or 5, characterized in that, Two first pressing plates (42) and one second pressing plate (44) are respectively arranged on the connecting plate (36) to fix the energy storage converter (4) on the connecting plate (36).

7. A hardware test device for a network-forming energy storage converter according to claim 6, characterized in that It further includes a first screw (41) installed on the connecting plate (36) corresponding to both ends of the first pressing plate (42) respectively. Both ends of the first pressing plate (42) are sleeved on the two first screws (41) and locked by nuts. It further includes a second screw (43) installed on the connecting plate (36) corresponding to both ends of the second pressing plate (44) respectively. Both ends of the second pressing plate (44) are sleeved on the two second screws (43) and locked by nuts.

8. A hardware test device for a grid-forming energy storage converter according to claim 2, characterized in that, A pump oil pipe is installed on the elastic adjusting connector (2). The pump oil pipe is connected to an oil pump, and a flow meter is installed on the pump oil pipe.

9. The hardware test device for a network-forming energy storage converter according to claim 8, characterized in that The wire of the oil pump is electrically connected to the wire on the energy storage converter (4).

10. A hardware testing method for a network-forming energy storage converter, characterized in that Adopting a hardware test device for a grid-forming energy storage converter as described in claim 6, it includes the following steps: S1. Install the energy storage converter (4) on the connecting plate (36) and start the vibration motor (11). S2. When the connecting plate (36) flips from the horizontal state towards one group of elastic adjusting connectors (2), the damping states of both groups of elastic adjusting connectors (2) are low damping values. S3. When the connecting plate (36) flips from the horizontal state towards one group of elastic adjusting connectors (2), the damping states of both groups of elastic adjusting connectors (2) are high damping values. S4. One group of elastic adjusting connectors (2) close to the flipping position of the connecting plate (36) has a low damping value, and the other group of elastic adjusting connectors (2) has a high damping value. S5. One group of elastic adjusting connectors (2) close to the flipping position of the connecting plate (36) has a high damping value, and the other group of elastic adjusting connectors (2) has a low damping value.

Images