Safe and reliable electrical topology applied to air energy storage compression section

Abstract

The utility model discloses a safe and reliable electrical topology applied to an air energy storage compression section, which comprises a first working section and a second working section, a variable-frequency power supply contact unit and a variable-frequency outgoing line contact unit are also connected between the first working section and the second working section; according to the safe and reliable electrical topology applied to the air energy storage compression section provided by the utility model, through a method of adding the variable-frequency power supply contact unit and the variable-frequency outgoing line contact unit in a complete set of switch cabinets configured by two lines, two frequency converters of the two lines are connected, so that the two frequency converters can be standby for each other; the safety and reliability of a compression section are greatly improved, and the operation continuity of a compressed air energy storage power station is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, and in particular to a safe and reliable electrical topology applied to an air energy storage compression section. Background Art

[0002] The compressor compression stage is a crucial process in a compressed air energy storage power station. Its safe and stable operation is crucial to the normal operation of the entire compressed air energy storage power station. The compression stage is often configured in a dual-line configuration, with three or four compressors per line.

[0003] Currently, each line in the compression section of a compressed air energy storage power station is equipped with a frequency converter (VFD). Each VFD sequentially starts each compressor and drives the last compressor in variable frequency operation. The VFDs in the two compression lines operate independently and are not interconnected. If one VFD fails, it will cause the compression section and the entire compressed air energy storage power station to shut down, resulting in severe economic losses.

[0004] In the existing two-line electrical system of the compression section of a compressed air energy storage power station, after the inverter power cabinet on each line is closed and the inverter is powered on, a start command is issued through the CCS control system. Each inverter sequentially starts motors 1#, 2#, and 3#, switching them to power frequency operation. It then starts motor 4# and drives inverter 4# to variable frequency operation. In this electrical topology, if a fault occurs in the cable between the inverter power cabinet and the inverter on one line, or in the inverter itself, the entire line will be shut down, preventing normal gas compression and storage, resulting in significant economic losses. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a safe and reliable electrical topology for use in the air energy storage compression section, so as to solve the problem in the existing technology that if one side of the two-wire electrical system fails, the entire line will be shut down.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve them: a safe and reliable electrical topology applied to the air energy storage compression section, including a first working section and a second working section, and a variable frequency power supply connection unit and a variable frequency output line connection unit are also connected between the first working section and the second working section.

[0007] The variable frequency power supply connection unit comprises a variable frequency power supply connection cabinet and a variable frequency power supply connection plug-in cabinet which are connected in sequence.

[0008] One end of the described variable-frequency power supply connection cabinet is connected to the variable-frequency power supply connection plug-in cabinet, and the other end is connected to one end of the first variable-frequency power supply cabinet that is connected to the first variable-frequency unit of the first working section. One end of the described variable-frequency power supply connection plug-in cabinet is connected to the variable-frequency power supply connection cabinet, and the other end is connected to one end of the second variable-frequency power supply cabinet that is connected to the second variable-frequency unit of the second working section.

[0009] The described variable-frequency outgoing line connection unit includes a variable-frequency outgoing line connection cabinet and a variable-frequency outgoing line connection plug-in cabinet that are connected in sequence.

[0010] One end of the described variable-frequency outgoing line connection cabinet is connected to the variable-frequency outgoing line connection plug-in cabinet, and the other end is connected to one end of the first starting cabinet that is connected to the first variable-frequency unit of the first working section. One end of the described variable-frequency outgoing line connection plug-in cabinet is connected to the variable-frequency outgoing line connection cabinet, and the other end is connected to one end of the second starting cabinet that is connected to the second variable-frequency unit of the second working section.

[0011] The present utility model further has the following technical features:

[0012] The described first working section includes: a plurality of groups of first incoming line cabinets, first operating cabinets, and first motors that are connected in sequence. One side of the first incoming line cabinet is connected to the first operating cabinet, and the other side is connected to the first incoming line power supply.

[0013] A first PT cabinet is also connected between the first incoming line cabinet and the first operating cabinet.

[0014] The described first working section further includes a first variable-frequency power supply cabinet, a first variable-frequency unit, and a plurality of first starting cabinets that are connected in sequence. One side of the first variable-frequency power supply cabinet is connected to the first variable-frequency unit, and the other side is connected to the first incoming line cabinet. One side of the first starting cabinet is connected to the first variable-frequency unit, and the other side is connected to the first motor.

[0015] The number of the described first starting cabinets is the same as the number of the first motors.

[0016] The described first variable-frequency unit includes a first variable-frequency incoming line cabinet, a first frequency converter, and a first variable-frequency outgoing line cabinet that are connected in sequence.

[0017] The first variable-frequency incoming line cabinet is connected to the first variable-frequency power supply cabinet, and the first variable-frequency outgoing line cabinet is connected to the first starting cabinet.

[0018] The described second working section includes: a plurality of groups of second incoming line cabinets, second operating cabinets, and second motors that are connected in sequence. One side of the second incoming line cabinet is connected to the second operating cabinet, and the other side is connected to the second incoming line power supply.

[0019] A second PT cabinet is also connected between the second incoming line cabinet and the second operating cabinet.

[0020] The second working section further includes a second frequency conversion power supply cabinet, a second frequency conversion unit, and a number of second starting cabinets connected in sequence. One side of the second frequency conversion power supply cabinet is connected to the second frequency conversion unit, and the other side is connected to the second incoming line cabinet. One side of the second starting cabinet is connected to the second frequency conversion unit, and the other side is connected to the second motor.

[0021] The number of the second starting cabinets is the same as the number of the second motors.

[0022] The second frequency conversion unit includes a second frequency conversion incoming line cabinet, a second frequency converter, and a second frequency conversion outgoing line cabinet connected in sequence.

[0023] The second frequency conversion incoming line cabinet is connected to the second frequency conversion power supply cabinet, and the second frequency conversion outgoing line cabinet is connected to the second starting cabinet.

[0024] The second frequency conversion incoming line cabinet is connected to the second frequency conversion power supply cabinet, and the second frequency conversion outgoing line cabinet is connected to the second starting cabinet.

[0025] Compared with the prior art, the utility model has the following technical effects:

[0026] (Ⅰ) A safe and reliable electrical topology applied to the air energy storage compression section provided by the utility model, by adding a frequency conversion power supply connection unit and a frequency conversion outgoing line connection unit in the complete switchgear configured in two lines, connecting the two frequency converters in the two lines, enabling the two frequency converters to be used as backups for each other, greatly improving the safety and reliability of the compression section, and ensuring the continuity of the operation of the compressed air energy storage power station.

[0027] (Ⅱ) The safe and reliable electrical topology applied to the air energy storage compression section provided by the utility model has a simple structure, convenient operation, high safety and reliability, and strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. I is a schematic diagram of the overall structure of the safe and reliable electrical topology applied to the air energy storage compression section of the utility model.

[0029] Figure 2 FIG. II is a schematic diagram of the overall structure of the safe and reliable electrical topology applied to the air energy storage compression section of the utility model.

[0030] Figure 3 FIG. a is a schematic diagram of the actual application of the safe and reliable electrical topology applied to the air energy storage compression section of the utility model.

[0031] Figure 4 FIG. b is a schematic diagram of the actual application of the safe and reliable electrical topology applied to the air energy storage compression section of the utility model.

[0032] The meanings of the reference numerals in the drawings are as follows:

[0033] 1 - First working section, 2 - Second working section, 3 - Variable - frequency power connection unit, 4 - Variable - frequency outgoing line connection unit.

[0034] 1 - 1 First incoming line cabinet, 1 - 2 First operating cabinet, 1 - 3 First motor, 1 - 4 First incoming line power supply, 1 - 5 First PT cabinet, 1 - 6 First variable - frequency power cabinet, 1 - 7 First variable - frequency unit, 1 - 8 First starting cabinet.

[0035] 2 - 1 Second incoming line cabinet, 2 - 2 Second operating cabinet, 2 - 3 Second motor, 2 - 4 Second incoming line power supply, 2 - 5 Second PT cabinet, 2 - 6 Second variable - frequency power cabinet, 2 - 7 Second variable - frequency unit, 2 - 8 Second starting cabinet.

[0036] 3 - 1 Variable - frequency power connection cabinet, 3 - 2 Variable - frequency power connection plug - in cabinet.

[0037] 4 - 1 Variable - frequency outgoing line connection cabinet, 4 - 2 Variable - frequency outgoing line connection plug - in cabinet.

[0038] 1 - 7 - 1 First variable - frequency incoming line cabinet, 1 - 7 - 2 First frequency converter, 1 - 7 - 3 First variable - frequency outgoing line cabinet.

[0039] 2 - 7 - 1 Second variable - frequency incoming line cabinet, 2 - 7 - 2 Second frequency converter, 2 - 7 - 3 Second variable - frequency outgoing line cabinet.

[0040] The following further elaborates on the specific content of the present utility model in conjunction with embodiments. Specific embodiments

[0041] All components in the present utility model, unless otherwise specified, are all components known in the prior art.

[0042] The following provides specific embodiments of the present utility model. It should be noted that the present utility model is not limited to the following specific embodiments, and all equivalent transformations made on the basis of the technical solutions of this application fall within the protection scope of the present utility model.

[0043] Embodiment 1:

[0044] This embodiment provides a safe and reliable electrical topology applied to the air energy storage compression section. As shown in Figure 1, it includes a first working section 1 and a second working section 2, and a variable - frequency power connection unit 3 and a variable - frequency outgoing line connection unit 4 are also connected between the first working section 1 and the second working section 2.

[0045] The first working section 1 includes:

[0046] A number of groups of first incoming line cabinets 1 - 1, first operating cabinets 1 - 2, and first motors 1 - 3 connected in sequence. One side of the first incoming line cabinet 1 - 1 is connected to the first operating cabinet 1 - 2, and the other side is connected to the first incoming line power supply 1 - 4.

[0047] A first PT cabinet 1-5 is further connected between the first incoming cabinet 1-1 and the first operating cabinet 1-2.

[0048] The first working section 1 also includes a first frequency conversion power supply cabinet 1-6, a first frequency conversion unit 1-7 and several first starting cabinets 1-8 connected in sequence. The first frequency conversion power supply cabinet 1-6 is connected to the first frequency conversion unit 1-7 on one side and connected to the first incoming line cabinet 1-1 on the other side. The first starting cabinet 1-8 is connected to the first frequency conversion unit 1-7 on one side and connected to the first motor 1-3 on the other side.

[0049] The number of the first starter cabinets 1 - 8 is the same as the number of the first motors 1 - 3 .

[0050] The second working section 2 includes:

[0051] Several groups of second incoming cabinets 2-1, second operating cabinets 2-2 and second motors 2-3 are connected in sequence. One side of the second incoming cabinet 2-1 is connected to the second operating cabinet 2-2, and the other side is connected to the second incoming power supply 2-4.

[0052] A second PT cabinet 2-5 is also connected between the second incoming cabinet 2-1 and the second operating cabinet 2-2.

[0053] The second working section 2 also includes a second frequency conversion power supply cabinet 2-6, a second frequency conversion unit 2-7 and several second starting cabinets 2-8 connected in sequence. The second frequency conversion power supply cabinet 2-6 is connected to the second frequency conversion unit 2-7 on one side and connected to the second incoming line cabinet 2-1 on the other side. The second starting cabinet 2-8 is connected to the second frequency conversion unit 2-7 on one side and connected to the second motor 2-3 on the other side.

[0054] The number of the second starter cabinets 2-8 is the same as the number of the second motors 2-3.

[0055] The variable frequency power supply connection unit 3 includes a variable frequency power supply connection cabinet 3-1 and a variable frequency power supply connection plug-in cabinet 3-2 which are connected in sequence.

[0056] One end of the variable frequency power supply liaison cabinet 3-1 is connected to the variable frequency power supply liaison plug-in cabinet 3-2, and the other end is connected to the first frequency conversion unit 1-7 and one end of the first frequency conversion power supply cabinet 1-6. One end of the variable frequency power supply liaison plug-in cabinet 3-2 is connected to the variable frequency power supply liaison cabinet 3-1, and the other end is connected to the second frequency conversion unit 2-7 and one end of the second frequency conversion power supply cabinet 2-6.

[0057] The variable frequency outgoing line connection unit 4 comprises a variable frequency outgoing line connection cabinet 4-1 and a variable frequency outgoing line connection plug-in cabinet 4-2 which are connected in sequence.

[0058] One end of the variable-frequency outgoing line connection cabinet 4-1 is connected to the variable-frequency outgoing line connection plug-in cabinet 4-2, and the other end is connected to one end of the first starting cabinet 1-8 connected to the first variable-frequency unit 1-7. One end of the variable-frequency outgoing line connection plug-in cabinet 4-2 is connected to the variable-frequency outgoing line connection cabinet 4-1, and the other end is connected to one end of the second starting cabinet 2-8 connected to the second variable-frequency unit 2-7.

[0059] Incoming line cabinet: Provides power for the operation of the motor.

[0060] Operating cabinet: After the variable-frequency startup is completed, the motor is put into operation at power frequency. PT cabinet: Converts 10 kV high voltage into 100 VAC for use by measuring instruments and integrated protection devices.

[0061] Variable-frequency power supply cabinet: The switch cabinet in the high-voltage distribution room that provides power for the frequency converter.

[0062] Starting cabinet: The switch cabinet that controls the startup of a certain motor by the frequency converter.

[0063] In the present utility model, the electrical topology of the compression section of the compressed air energy storage power station avoids the shutdown of the compression section caused by variable-frequency faults by increasing connections, circumvents the power-off maintenance risks brought to the power station thereby, reduces the dependence of the compression section process on the frequency converter, and enhances the continuity and reliability of the operation of the compression section.

[0064] Four high-voltage switch cabinets (variable-frequency power supply connection cabinet, variable-frequency power supply connection plug-in cabinet, variable-frequency outgoing line connection cabinet, and variable-frequency outgoing line connection plug-in cabinet) are added to each line. Two lines connected to each other in the topological loop are used to enable the frequency converters of the two lines to be mutually backup, and electrical interlocks are added to ensure the safety of one-key switching of the frequency converter.

[0065] As a preference of this embodiment:

[0066] The first variable-frequency unit 1-7 includes a first variable-frequency incoming line cabinet 1-7-1, a first frequency converter 1-7-2, and a first variable-frequency outgoing line cabinet 1-7-3 connected in sequence.

[0067] The first variable-frequency incoming line cabinet 1-7-1 is connected to the first variable-frequency power supply cabinet 1-6, and the first variable-frequency outgoing line cabinet 1-7-3 is connected to the first starting cabinet 1-8.

[0068] The second variable-frequency unit 2-7 includes a second variable-frequency incoming line cabinet 2-7-1, a second frequency converter 2-7-2, and a second variable-frequency outgoing line cabinet 2-7-3 connected in sequence.

[0069] The second variable-frequency incoming line cabinet 2-7-1 is connected to the second variable-frequency power supply cabinet 2-6, and the second variable-frequency outgoing line cabinet 2-7-3 is connected to the second starting cabinet 2-8.

[0070] Variable-frequency incoming line cabinet: Installed in the variable-frequency converter room, between the variable-frequency power supply cabinet and the variable-frequency converter, it plays a role in maintenance isolation and at the same time leads the power from the variable-frequency power supply cabinet to the variable-frequency converter.

[0071] Variable-frequency converter: In certain situations, it serves as the starting equipment for large motors and, in certain situations, as the core equipment for variable-speed regulation of large motors. This project combines both functions.

[0072] Variable-frequency outgoing line cabinet: The necessary switchgear cabinet for connecting the output side load of the variable-frequency converter.

[0073] Example 2:

[0074] A safe and reliable electrical topology applied to the air energy storage compression section, as Figure 3 - Figure 4 shown. The entire topology consists of 42 high-voltage switchgear cabinets, among which I-AH52, I-AH66, II-AH52, and II-AH66 are additional supporting switchgear cabinets.

[0075] In the I line of this embodiment, that is, the first working section 1 includes 21 switchgear cabinets:

[0076] The first incoming line cabinet 1-1 includes: I line 1# incoming line cabinet I-AH11, I line 2# incoming line cabinet I-AH21, I line 3# incoming line cabinet I-AH31, I line 4# incoming line cabinet I-AH41.

[0077] The first operation cabinet 1-2 includes: I line 1# operation cabinet I-AH13, I line 2# operation cabinet I-AH23, I line 3# operation cabinet I-AH33, I line 4# operation cabinet I-AH43.

[0078] The first motor 1-3 includes: I-1# motor, I-2# motor, I-3# motor, I-4# motor.

[0079] The first incoming line power supply 1-4 includes: I line 1# incoming line power supply, I line 2# incoming line power supply, I line 3# incoming line power supply, I line 4# incoming line power supply.

[0080] The first PT cabinet 1-5 includes: I line 1# PT cabinet I-AH12, I line 2# PT cabinet I-AH22, I line 3# PT cabinet I-AH32, I line 4# PT cabinet I-AH42.

[0081] The first variable-frequency power supply cabinet 1-6 is the I line variable-frequency power supply cabinet I-AH44, installed between the I line 4# incoming line cabinet and the I line variable-frequency incoming line cabinet.

[0082] The first variable-frequency unit 1-7 includes: I line variable-frequency incoming line cabinet I-AH53, I line variable-frequency outgoing line cabinet I-AH65, and the 1# variable-frequency converter connected between the I line variable-frequency incoming line cabinet I-AH53 and the I line variable-frequency outgoing line cabinet I-AH65.

[0083] The first startup cabinet 1-8 includes: the I-line 1# startup cabinet I-AH61, the I-line 2# startup cabinet I-AH62, the I-line 3# startup cabinet I-AH63, and the I-line 4# startup cabinet I-AH64.

[0084] In this embodiment, the II-line, that is, the second working section 2, contains 21 switch cabinets:

[0085] The second incoming line cabinet 2-1 includes: the II-line 1# incoming line cabinet II-AH41, the II-line 2# incoming line cabinet II-AH42, the II-line 3# incoming line cabinet II-AH43, and the II-line 4# incoming line cabinet II-AH44.

[0086] The second operation cabinet 2-2 includes: the II-line 1# operation cabinet II-AH13, the II-line 2# operation cabinet II-AH23, the II-line 3# operation cabinet II-AH33, and the II-line 4# operation cabinet II-AH43.

[0087] The second motor 2-3 includes: the II-1# motor, the II-2# motor, the II-3# motor, and the II-4# motor.

[0088] The second incoming line power supply 2-4 includes: the II-line 1# incoming line power supply, the II-line 2# incoming line power supply, the II-line 3# incoming line power supply, and the II-line 4# incoming line power supply.

[0089] The second PT cabinet 2-5 includes: the II-line 1# PT cabinet II-AH12, the II-line 2# PT cabinet II-AH22, the II-line 3# PT cabinet II-AH32, and the II-line 4# PT cabinet II-AH42.

[0090] The second frequency conversion power supply cabinet 2-6 is the II-line frequency conversion power supply cabinet II-AH44, which is installed between the II-line 4# incoming line cabinet and the II-line frequency conversion incoming line cabinet.

[0091] The second frequency conversion unit 2-7 includes: the II-line frequency conversion incoming line cabinet II-AH53, the II-line frequency conversion outgoing line cabinet, and the 2# frequency converter connected between the II-line frequency conversion incoming line cabinet II-AH53 and the II-line frequency conversion outgoing line cabinet II-AH65.

[0092] The second startup cabinet 2-8 includes: the II-line 1# startup cabinet II-AH61, the II-line 2# startup cabinet II-AH62, the II-line 3# startup cabinet II-AH63, and the II-line 4# startup cabinet II-AH64.

[0093] The frequency conversion power supply connection unit 3 includes a frequency conversion power supply connection cabinet 3-1 and a frequency conversion power supply connection plug-in cabinet 3-2 connected in sequence.

[0094] In this embodiment, the variable frequency power supply connection cabinet 3-1 is an I-line variable frequency power supply connection cabinet I-AH52, and the variable frequency power supply connection plug-in cabinet 3-2 is a II-line variable frequency power supply connection plug-in cabinet II-AH52.

[0095] One end of the I-line frequency conversion outgoing line contact cabinet I-AH66 is connected to the II-line frequency conversion power supply contact plug-in cabinet II-AH52, and the other end is connected to the I-line frequency conversion incoming line cabinet I-AH53 connected to one end of the I-line frequency conversion power supply cabinet I-AH44. One end of the II-line frequency conversion power supply contact plug-in cabinet II-AH52 is connected to the I-line frequency conversion outgoing line contact cabinet I-AH66, and the other end is connected to the II-line frequency conversion incoming line cabinet II-AH53 connected to one end of the II-line frequency conversion power supply cabinet II-AH44.

[0096] The variable frequency outgoing line connection unit 4 comprises a variable frequency outgoing line connection cabinet 4 - 1 and a variable frequency outgoing line connection plug-in cabinet 4 - 2 which are connected in sequence.

[0097] In this embodiment, the frequency conversion outgoing line connection cabinet 4-1 is an I-line frequency conversion outgoing line connection cabinet I-AH66, and the frequency conversion outgoing line connection plug-in cabinet 4-2 is a II-line frequency conversion outgoing line connection plug-in cabinet II-AH66.

[0098] One end of the I-line frequency conversion outgoing line contact cabinet I-AH66 is connected to the II-line frequency conversion outgoing line contact plug-in cabinet II-AH66, and the other end is connected to the I-line frequency conversion outgoing line cabinet I-AH65 and one end of the I-line 4# starting cabinet I-AH64 is connected. One end of the II-line frequency conversion outgoing line contact plug-in cabinet II-AH66 is connected to the I-line frequency conversion outgoing line contact cabinet I-AH66, and the other end is connected to the II-line frequency conversion outgoing line cabinet and II-AH65 and one end of the II-line 4# starting cabinet II-AH64 is connected.

[0099] Specifically, the I-line 4# incoming power supply, the I-line 4# incoming cabinet I-AH41, the I-line 4# running cabinet I-AH43 and the I-4# motor are connected in sequence, the I-line 4# PT cabinet I-AH42 is connected to the I-line 4# incoming cabinet I-AH41, the I-line frequency conversion power supply cabinet I-AH44 is connected to the I-line frequency conversion incoming cabinet, 1# inverter and the I-line frequency conversion outgoing cabinet in sequence, the I-line frequency conversion outgoing cabinet is also connected to the I-line 4# starting cabinet I-AH64, and the I-line 4# starting cabinet I-AH64 is connected to the I-4# motor.

[0100] The I-line 3# incoming power supply, I-line 3# incoming cabinet I-AH31, I-line 3# running cabinet I-AH33 and I-3# motor are connected in sequence. The I-line 3# PT cabinet I-AH32 is connected to the I-line 3# incoming cabinet I-AH31. The I-line frequency conversion outgoing cabinet is also connected to the I-line 3# starting cabinet I-AH63. The I-line 3# starting cabinet I-AH63 is connected to the I-3# motor. The connection method for the remaining lines is similar.

[0101] The working process of the above technical solution is as follows:

[0102] Normal operation flow: When all process start conditions are met, the 1#CCS control system sends a start command to the inverter logic control cabinet. After program evaluation, the inverter sends closing commands to the inverter power cabinet, the inverter incoming cabinet, and the inverter outgoing cabinet. The 1#CCS receives closing feedback from the inverter outgoing cabinet. Program evaluation or manual judgment triggers the 1#CCS to select the I-1# motor command. Upon receiving this motor selection command, the inverter sends a closing command to the I-1# starting cabinet (I-AH61) on line 1. The motor speed increases. After the inverter determines that it meets the synchronous grid connection requirements, it closes the I-1# running cabinet (I-AH13) on line 1. The process continues until the I-3# running cabinet (I-AH33) on line 1 closes. The 1#CCS program evaluation or manual judgment triggers the 1#CCS to select the I-4# motor command. Upon receiving this motor selection command, the inverter sends a closing command to the I-4# starting cabinet (I-AH64) on line 1. The motor speed increases and maintains variable speed control operation. At this point, the I-1 compression section operates normally. The startup process of line II is the same as that of line I.

[0103] Abnormal operation flow: If inverter #1 fails, the unit shuts down. Inverter #2 on line II starts all motors on line II to commercial frequency operation. At this point, CCS #2 issues a switch-off command, switching motor #II-4 from variable frequency operation to commercial frequency operation. CCS #2 then issues another start command, and inverter #2 logically sends a signal to inverter power supply liaison cabinets I-AH52 and I-AH44 on line I, switching inverter power to the transformer on line I. It then closes the inverter output liaison cabinet on line I, switching the inverter output to line I. Finally, motors I-1, I-2, and I-3 on line I are started sequentially, while inverter #I-4 maintains variable frequency operation. This completes the abnormal operation flow.

[0104] During the closing process of the variable frequency power supply contact cabinet and the variable frequency outgoing line contact cabinet, the addition of the corresponding two-choice electrical locking signal ensures that unsafe closing situations such as asynchronous grid connection will not occur during the closing process.

[0105] Compared with conventional electrical topology, the utility model increases the interconnection between the two starting sections, which greatly improves the safety and reliability of the compression process.

[0106] The above technical solutions are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be thought of by any technician familiar with the field within the technical scope disclosed by the present invention without creative work are all covered by the protection scope of the present invention.

Claims

1. A safe and reliable electrical topology applied to the compression section of air energy storage, comprising a first working section (1) and a second working section (2), characterized in that, A frequency conversion power supply connection unit (3) and a frequency conversion outgoing line connection unit (4) are also connected between the first working section (1) and the second working section (2); The frequency conversion power supply connection unit (3) includes a frequency conversion power supply connection cabinet (3-1) and a frequency conversion power supply connection plug-in cabinet (3-2) connected in sequence; One end of the frequency conversion power supply connection cabinet (3-1) is connected to the frequency conversion power supply connection plug-in cabinet (3-2), and the other end is connected to one end of a first frequency conversion power supply cabinet (1-6) connected to the first frequency conversion unit (1-7) of the first working section (1). One end of the frequency conversion power supply connection plug-in cabinet (3-2) is connected to the frequency conversion power supply connection cabinet (3-1), and the other end is connected to one end of a second frequency conversion power supply cabinet (2-6) connected to the second frequency conversion unit (2-7) of the second working section (2); The frequency conversion outgoing line connection unit (4) includes a frequency conversion outgoing line connection cabinet (4-1) and a frequency conversion outgoing line connection plug-in cabinet (4-2) connected in sequence; One end of the frequency conversion outgoing line connection cabinet (4-1) is connected to the frequency conversion outgoing line connection plug-in cabinet (4-2), and the other end is connected to one end of a first starting cabinet (1-8) connected to the first frequency conversion unit (1-7) of the first working section (1). One end of the frequency conversion outgoing line connection plug-in cabinet (4-2) is connected to the frequency conversion outgoing line connection cabinet (4-1), and the other end is connected to one end of a second starting cabinet (2-8) connected to the second frequency conversion unit (2-7) of the second working section (2).

2. The safe and reliable electrical topology applied to the air energy storage compression section as described in claim 1, characterized in that, The first working section (1) includes: A number of groups of first incoming line cabinets (1-1), first operating cabinets (1-2) and first motors (1-3) connected in sequence. One side of the first incoming line cabinet (1-1) is connected to the first operating cabinet (1-2), and the other side is connected to a first incoming line power supply (1-4); A first PT cabinet (1-5) is also connected between the first incoming line cabinet (1-1) and the first operating cabinet (1-2); The first working section (1) further includes a first frequency conversion power supply cabinet (1-6), a first frequency conversion unit (1-7) and a number of first starting cabinets (1-8) connected in sequence. One side of the first frequency conversion power supply cabinet (1-6) is connected to the first frequency conversion unit (1-7), and the other side is connected to the first incoming line cabinet (1-1). One side of the first starting cabinet (1-8) is connected to the first frequency conversion unit (1-7), and the other side is connected to the first motor (1-3); The number of the first starting cabinets (1-8) is the same as the number of the first motors (1-3).

3. The safe and reliable electrical topology applied to the air energy storage compression section according to claim 2, wherein, The first frequency conversion unit (1-7) includes a first frequency conversion incoming line cabinet (1-7-1), a first frequency converter (1-7-2) and a first frequency conversion outgoing line cabinet (1-7-3) connected in sequence; The first frequency conversion incoming line cabinet (1-7-1) is connected to the first frequency conversion power supply cabinet (1-6), and the first frequency conversion outgoing line cabinet (1-7-3) is connected to the first starting cabinet (1-8).

4. The safe and reliable electrical topology applied to the air energy storage compression section as described in claim 1, wherein, The second working section (2) includes: A number of groups of second incoming line cabinets (2-1), second operating cabinets (2-2), and second motors (2-3) connected in sequence. One side of the second incoming line cabinet (2-1) is connected to the second operating cabinet (2-2), and the other side is connected to the second incoming line power supply (2-4). A second PT cabinet (2-5) is also connected between the second incoming line cabinet (2-1) and the second operating cabinet (2-2). The second working section (2) further includes a second variable frequency power supply cabinet (2-6), a second variable frequency unit (2-7), and a number of second starting cabinets (2-8) connected in sequence. One side of the second variable frequency power supply cabinet (2-6) is connected to the second variable frequency unit (2-7), and the other side is connected to the second incoming line cabinet (2-1). One side of the second starting cabinet (2-8) is connected to the second variable frequency unit (2-7), and the other side is connected to the second motor (2-3). The number of the second starting cabinets (2-8) is the same as the number of the second motors (2-3).

5. The safe and reliable electrical topology applied to the air energy storage compression section as claimed in claim 4, wherein, The second variable frequency unit (2-7) includes a second variable frequency incoming line cabinet (2-7-1), a second frequency converter (2-7-2), and a second variable frequency outgoing line cabinet (2-7-3) connected in sequence. The second variable frequency incoming line cabinet (2-7-1) is connected to the second variable frequency power supply cabinet (2-6), and the second variable frequency outgoing line cabinet (2-7-3) is connected to the second starting cabinet (2-8).

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