Fault recording device and generator set synchronization test method
By introducing load reduction protection components and isolation transformer design into the fault recording device, the problems of reduced sampling accuracy and signal interference caused by battery voltage fluctuations were solved, and high-precision recording and safe and reliable synchronous testing were achieved.
Patent Information
- Application Number
- CN202510655401.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-21
- Publication Date
- 2025-10-10
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional fault recording devices are susceptible to battery voltage fluctuations, resulting in reduced sampling accuracy and data loss. They also lack active protection mechanisms, which affects recording accuracy and equipment life. At the same time, grid-connected command signals are susceptible to interference, affecting grid security.
The use of load reduction protection components, including mounting base, coil and armature design, automatically disconnects the battery connection. Combined with the isolation transformer to separate the signal channel, it ensures stable battery power supply and signal interference suppression, achieving high-precision recording and safe grid connection.
The design of load reduction protection components avoids the loss of recorded data caused by a sudden drop in battery voltage, improves the reliability and accuracy of the recording device, and suppresses signal interference through the isolation transformer, thereby improving the safety and accuracy of the grid-connected test.
Smart Images
Figure CN120761843A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of engine synchronization technology, and particularly relates to a fault recording device and a generator set synchronization test method. BACKGROUND
[0002] With the increasing requirements of the power system on the precision and reliability of the fault recording device and the synchronization test, the traditional fault recording device has the following defects: the existing device directly relies on the battery for power supply, and voltage fluctuation easily leads to the decrease of the sampling precision of the analog quantity collection channel (such as the current and voltage signals), and the waveform distortion may cover the real fault characteristics, when the battery voltage suddenly drops, the recording program is easily interrupted and the data is lost, and there is lack of active protection mechanism, which affects the recording precision and the service life of the equipment; in the traditional method, the collection of the parallel test voltage and the system side voltage is easily disturbed, and the delay analysis of the grid connection instruction signal and the recording time sequence relies on the artificial experience, which easily causes misjudgment and affects the grid connection safety. SUMMARY
[0003] Therefore, the technical problem to be solved by the present application is to provide a device with a power supply protection mechanism, high-precision recording capability and synchronization test analysis support, so as to improve the safety of the power system and the fault diagnosis efficiency.
[0004] The above technical problem is solved by the following technical scheme: the present application provides a fault recording device and a generator set synchronization test method, which comprises a load shedding protection component, a circuit board and a battery installed at both ends of the load shedding protection component.
[0005] The battery supplies power to the circuit board, and when the battery voltage suddenly drops, the load shedding protection component is disconnected from the battery.
[0006] In a preferred embodiment of the fault recording device and the generator set synchronization test method, the load shedding protection component comprises: a mounting seat fixedly connected to the circuit board, the mounting seat is composed of two hollow cylinders with different diameters, and the mounting seat is inserted with the battery at one end.
[0007] In a preferred embodiment of the fault recording device and the generator set synchronization test method, the load shedding protection component comprises: a clamping groove fixedly connected to the surface of the mounting seat, and a coil wound in the clamping groove.
[0008] In a preferred embodiment of the fault recording device and the generator set synchronization test method, the load shedding protection component further comprises: a through hole formed at one end of the clamping groove, the through hole penetrates the mounting seat, and the coil passes through the through hole.
[0009] In an optimal implementation form of the fault recording device and the generator set synchronization test method, a plurality of symmetrical sliding grooves are formed in the inner wall of the mounting seat, and an armature is slidably connected in the sliding grooves.
[0010] In an optimal implementation form of the fault recording device and the generator set synchronization test method, a plurality of symmetrical sliding grooves are formed in the inner wall of the mounting seat, and an armature is slidably connected in the sliding grooves.
[0011] In an optimal implementation form of the fault recording device and the generator set synchronization test method, a plurality of symmetrical sliding grooves are formed in the inner wall of the mounting seat, and an armature is slidably connected in the sliding grooves.
[0012] In an optimal implementation form of the fault recording device and the generator set synchronization test method, S1: the alternating voltage of the generator set in the synchronization device generates a comparison signal through an isolation transformer and is connected to the fault recording device; S2: the grid connection instruction line of the synchronization device is opened and connected to the fault recording device; S3: the synchronization device is started to determine whether the synchronization condition meets a preset threshold; S4: the recording program in the fault recording device is started to form a recording file; and S5: the time delay and amplitude error of the voltage difference signal and the grid connection instruction displacement are analyzed through the recording file to determine whether the following degree meets a preset threshold.
[0013] In an optimal implementation form of the fault recording device and the generator set synchronization test method, the synchronization device includes two types of alternating voltage, i.e., the alternating voltage to be connected to the grid and the alternating voltage on the system side.
[0014] In an optimal implementation form of the fault recording device and the generator set synchronization test method, the fault recording device includes an analog quantity acquisition channel and a switching quantity acquisition channel; the alternating voltage to be connected to the grid and the alternating voltage on the system side are connected to the analog quantity acquisition channel; and the grid connection instruction line is connected to the switching quantity acquisition channel.
[0015] The beneficial effects of the present application are as follows: the coil and the armature in the load shedding protection component are designed in linkage, the magnetic field of the coil is weakened when the battery voltage is suddenly reduced, the armature automatically slides away from the battery contact, the circuit is quickly cut off, the recording data loss and the abnormal work of the circuit board are avoided, the sliding grooves of the armature are designed in cooperation with the joint, the accuracy and the low friction loss of the mechanical movement are ensured, the response speed and the reliability are improved, the mounting seat adopts a double hollow cylinder integrated structure, the inner diameter is matched with the outer diameter of the battery, the battery is stably inserted and connected, the contact resistance is reduced, the clamping groove is regularly wound around the coil, the magnetic field is uniformly distributed through the through hole, and the local overheating or magnetic field interference is avoided.
[0016] The analog quantity acquisition channel (connected to the alternating voltage to be connected to the grid and the alternating voltage on the system side) The terminal is designed separately from the switch quantity acquisition channel (terminals 9 and 10), signal interference is inhibited through an isolation transformer (terminals 5-7), and high-precision acquisition of the to-be-measured voltage (C620, N620) and the system-side voltage (N610, Sc710) is realized.
[0017] The time sequence delay and amplitude error of the voltage difference signal and the grid-connected instruction (101, 103) in the recording wave file are analyzed synchronously, the "following degree" index is quantified, data support is provided for the grid-connected dynamic response capability, and the objectivity of the test conclusion is improved. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, but not limit the present application. Among them:
[0019] Figure 1 The overall structure schematic diagram of the fault recording device and the fault recording device of the generator set synchronization test method is shown;
[0020] Figure 2 The circuit board structure schematic diagram of the fault recording device and the generator set synchronization test method is shown;
[0021] Figure 3 The cross-sectional structure schematic diagram of the load shedding protection component of the fault recording device and the generator set synchronization test method is shown;
[0022] Figure 4 The control diagram of the fault recording device and the generator set synchronization test method is shown.
[0023] In the drawings:
[0024] 1, load shedding protection component; 2, circuit board; 3, battery; 11, mounting seat; 12, clamping groove; 13, coil; 14, through hole; 15, sliding groove; 16, armature; 21, joint. DETAILED DESCRIPTION
[0025] In order to make those skilled in the art better understand the present application, the present application will be further described in detail below in combination with specific embodiments and drawings.
[0026] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions about the present application, but these terms can be changed according to the intention of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as simple names, but based on the meaning of the terms and the overall description of the present application.
[0027] Referring to Figures 1-3 The embodiment provides a fault recording device and a generator set synchronization test method, which comprise a load shedding protection component 1, a circuit board 2 and a battery 3 installed at two ends of the load shedding protection component 1; the battery 3 supplies power for the circuit board 2, and when the voltage of the battery 3 drops suddenly, the load shedding protection component 1 disconnects the connection with the battery 3.
[0028] The battery 3 is plugged on the circuit board 2 through the load shedding protection component 1 to supply power for the fault recording device, and the load shedding protection component 1 prevents the data of the fault recording device from being lost and the accuracy of recording from being affected when the voltage of the battery 3 drops.
[0029] Further, the load shedding protection component 1 comprises: a mounting seat 11 fixedly connected to the circuit board 2, the mounting seat 11 is composed of two hollow cylinders with different diameters, one end of the mounting seat 11 is plugged with the battery 3, a clamping groove 12 fixedly connected to the surface of the mounting seat 11, and a coil 13 wound in the clamping groove 12. A through hole 14 is arranged at one end of the clamping groove 12, the through hole 14 penetrates the mounting seat 11, and the coil 13 passes through the through hole 14.
[0030] The mounting seat 11 supports and fixes the battery 3, connects the battery 3 and the circuit board 2, the inner diameter of one end of the mounting seat 11 is consistent with the outer diameter of the battery 3, the battery 3 is plugged in the mounting seat 11, the stable plugging of the battery 3 is realized, and the contact resistance is reduced.
[0031] The coil 13 is wound in the clamping groove 12 fixed to the outer surface of the mounting seat 11, the clamping groove 12 plays a role of regularizing and uniformizing the winding of the coil 13, the coil 13 contacts the battery 3 by passing through the through hole 14, the battery 3 transmits current to the coil 13, and the uniformly regularized coil 13 is beneficial to generating a uniform magnetic field.
[0032] Further, a group of symmetrical sliding grooves 15 are arranged on the inner wall of the mounting seat 11, and a armature 16 is slidably connected in the sliding grooves 15. A connector 21 is fixedly connected to the circuit board 2 and has a hollow structure. The armature 16 slides in the connector 21.
[0033] The armature 16 is a movable part of a magnetic circuit and converts magnetic energy into mechanical movement and is composed of a soft magnetic material, the armature 16 has a protruding block structure on both sides, the sliding grooves 15 in the mounting seat 11 are matched with the protruding block structure of the armature 16, the armature 16 slides in the sliding grooves 15, meanwhile, the inner diameter shape of the connector 21 is consistent with the outer diameter shape of the armature 16, the other end of the armature 16 slides in the connector 21, the accuracy and low friction loss of mechanical movement are ensured, and the response speed and reliability are improved.
[0034] In summary, when the battery 3 contacts the coil 13, the coil 13 converts electrical energy into magnetic energy, when the current passes through the coil 13, according to Ampere's law and the right-hand screw rule, a magnetic field is generated inside the coil 13, the magnetic field strength is proportional to the current size and the number of turns of the coil 13, and the armature 16 is attracted by the magnetic field of the coil 13, and generates a linear motion to approach the battery 3, and contacts the battery 3, and the armature 16 contacts the connector 21, so that the circuit board 2 is powered on.
[0035] Further, when the voltage of the battery 3 decreases, the magnetic field force generated by the coil 13 decreases, and the armature 16 moves away from the battery 3, at this time the armature 16 does not contact the battery 3, and the circuit is powered off.
[0036] Referring to Figure 4 , the AC voltage of the generator set in the synchronizing device generates a comparison signal through an isolation transformer and is connected to the fault recording device; the grid connection instruction line of the synchronizing device is opened and connected to the fault recording device; the synchronizing device is started, and it is judged whether the synchronization condition meets the preset threshold; the recording program in the fault recording device is started, and a recording file is formed; through the recording file, the time sequence delay and amplitude error of the voltage difference signal and the grid connection instruction displacement are analyzed to judge whether the following degree meets the preset threshold.
[0037] Further, the synchronizing device includes a standby AC voltage of the generator set and a system side AC voltage. The fault recording device includes an analog quantity acquisition channel and a switching quantity acquisition channel; the standby AC voltage and the system side AC voltage are connected to the analog quantity acquisition channel; and the grid connection instruction line is connected to the switching quantity acquisition channel.
[0038] In the automatic quasi-synchronization device, the standby voltage of the generator set includes C620 and N620, and the system side voltage includes N610 and Sc710. The grid connection instruction line includes two ends 101 and 103.
[0039] Further, the ④ terminal of the generator set standby voltage C620 and the ③ terminal of the N620 in the automatic quasi-synchronization device are connected to the ⑥ terminal and the ⑤ terminal of the isolation transformer; the ① terminal of the system side voltage N610 is connected to the ⑦ terminal of the isolation transformer, the ② terminal of the system side voltage Sc710 is connected to the terminal of the analog quantity acquisition channel of the fault recording device, and the ⑧ terminal of the isolation transformer is connected to the terminal of the analog quantity acquisition channel of the fault recording device.
[0040] The grid connection instructions 101 and 103 are connected to the ⑨ terminal and the ⑩ terminal of the switching quantity acquisition channel of the fault recording device, and the parameters of the analog quantity acquisition channel and the switching quantity acquisition channel in the fault recording device are set according to the measured values.
[0041] The starting generator set grid connection process, generator set zero to the actual specified value, starting with the same period device to determine the synchronization conditions, at the same time start fault recording device recording program, waiting for automatic quasi-synchronization device to determine the completion, waiting for the completion of the recording program; analysis of the analog quantity acquisition in the recording file, including the voltage difference signal between the side to be connected and the system side and the following degree between the grid connection instruction displacement, give the generator set false synchronization test conclusion: the dynamic response ability of the control system and the smoothness and safety of the grid connection.
[0042] Finally, it should be pointed out that the above detailed description of the method and apparatus are only embodiments, those skilled in the art can modify these embodiments in different ways, as long as it does not deviate from the scope of the present application.
Claims
1. A fault recording device, characterized in that: include A load shedding protection component (1), and a circuit board (2) and a battery (3) mounted at both ends of the load shedding protection component (1); The battery (3) supplies power to the circuit board (2); when the voltage of the battery (3) drops suddenly, the load reduction protection component (1) is disconnected from the battery (3).
2. The fault recording device according to claim 1, characterized in that: The load reduction protection component (1) comprises: The mounting base (11) is fixedly connected to the circuit board (2), and the mounting base (11) is composed of two hollow cylinders with different diameters that are fixedly connected. The battery (3) is plugged into one end of the mounting base (11).
3. The fault recording device according to claim 2, characterized in that: The load reduction protection component (1) comprises: A card slot (12) is fixedly connected to the surface of the mounting seat (11), and a coil (13) is wound in the card slot (12).
4. The fault recording device according to claim 3, characterized in that: The load shedding protection component (1) further comprises: A through hole (14) is provided at one end of the slot (12), the through hole (14) passes through the mounting seat (11), and the coil (13) passes through the through hole (14).
5. The fault recording device according to claim 4, characterized in that: A group of symmetrical sliding grooves (15) are provided on the inner wall of the mounting seat (11), and an armature (16) is slidably connected inside the sliding grooves (15).
6. The fault recording device according to claim 5, characterized in that: A connector (21) is fixedly connected to the circuit board (2), and the connector (21) is a hollow structure.
7. The fault recording device according to claim 6, characterized in that: The armature (16) slides in the joint (21).
8. A method for synchronous testing of a generator set, characterized by: The fault recording device according to any one of claims 1 to 7, comprising: S1: The AC voltage of the generator set in the synchronization device generates a comparison signal through an isolation transformer and is connected to the fault recording device; S2: Open the grid-connected command line of the synchronization device and connect the fault recording device; S3: Start the synchronization device to determine whether the synchronization condition meets the preset threshold; S4: Starting the recording program in the fault recording device to generate a recording file; S5: Analyze the timing delay and amplitude error between the voltage difference signal and the grid connection instruction change through the waveform recording file to determine whether the followability meets the preset threshold.
9. The generator set synchronization test method according to claim 8, characterized in that: The synchronization device includes the AC voltage to be measured of the generator set and the AC voltage on the system side.
10. The generator set synchronization test method according to claim 9, characterized in that: The fault recording device includes an analog quantity acquisition channel and a switch quantity acquisition channel; The AC voltage to be measured and the system-side AC voltage are connected to the analog quantity acquisition channel; The grid-connected instruction line is connected to the switch quantity acquisition channel.