Power protection device for signal machine room
By employing multi-level lightning protection, clipping, and anti-interference processing in the power supply protection device for the signal machinery room, combined with the DSP differential detection and control module, the problems of power fluctuation and phase difference in the signal machinery room were solved, achieving low-cost power stability and driving safety.
Patent Information
- Application Number
- CN202520451071.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-14
AI Technical Summary
The power supply for railway station signal machinery rooms suffers from large voltage fluctuations, severe harmonics, and high-frequency spikes. Furthermore, the switching time between the two input power supplies is long, which can easily lead to phase loss. Traditional UPS power supplies require a large amount of maintenance work and are costly. In addition, the voltage difference and phase difference between the two power supplies are too large.
The system employs a power integration module, a multi-level lightning protection module, a multi-stage clipping and peak-shaving anti-interference module, a comprehensive balancing module, and a DSP differential detection and control module. Through multi-level lightning protection, clipping, and anti-interference processing, combined with the DSP differential detection and control module to detect and control the output voltage phase, it ensures that the power supply panel meets the technical requirements of in-phase voltage difference <30V° and in-phase phase difference between two input power supplies <5°.
It effectively weakens and filters out multiple harmonics and high-frequency spikes from the external power supply, reduces power fluctuations, meets the power requirements of signal equipment, ensures driving safety, and is cheaper than traditional UPS power supplies.
Smart Images
Figure CN223912247U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to power supply technical field, concretely relates to a signal mechanical chamber power protection device. BACKGROUND
[0002] At present, the power supply of part of railway stations is false double through power supply, therefore the power supply voltage fluctuation of the signal mechanical chamber in the station is big, the harmonic is serious, the high frequency peak is serious, and the switching time of two input power supplies is long, the problem of three-phase input power supply phase failure is easy to appear, the traditional UPS power supply is set up as a standby power supply to solve the above problems, but the UPS has the problems of large maintenance workload, high use cost, too large same phase voltage difference and same phase phase difference of two power supply sources,
[0003] Therefore, we provide a low-cost power protection device that can reduce the power supply voltage fluctuation of the signal mechanical chamber. UTILITY MODEL CONTENTS
[0004] The utility model discloses a signal mechanical chamber power protection device, which can solve the problem of power fluctuation in the signal mechanical chamber.
[0005] The utility model discloses the following technical scheme realizes:
[0006] A signal mechanical chamber power protection device, comprising a power integration module, a multi-stage lightning protection module, a multiple wave attenuation peak anti-interference module, a comprehensive balance module, a DSP differential detection control module and a wide range voltage stabilizing module, the input end of the power integration module is electrically connected with various power supplies, and the output end of the power integration module is electrically connected with the multi-stage lightning protection module. The output end of the multi-stage lightning protection module is electrically connected with the multiple wave attenuation peak anti-interference module, and the output end of the multiple wave attenuation peak anti-interference module is electrically connected with the comprehensive balance module. The output end of the comprehensive balance module is electrically connected with the wide range voltage stabilizing module, and the output end of the wide range voltage stabilizing module is electrically connected with the DSP differential detection control module. The control output end of the DSP differential detection control module is electrically connected with the power integration module, and the signal output end of the DSP differential detection control module is electrically connected with the power screen.
[0007] Further, a battery pack and a detection module are arranged between the output end of the comprehensive balance module and the wide range voltage stabilizing module.
[0008] Further, the multi-stage lightning protection module is composed of three lightning arresters.
[0009] Further, the comprehensive balance module comprises a rectifier unit and a filter unit, the input end of the rectifier unit is electrically connected with the multiple wave attenuation peak anti-interference module, the output end of the rectifier unit is electrically connected with the filter unit, and the filter unit is electrically connected with the wide range voltage stabilizing module.
[0010] Further, the DSP differential detection control module comprises an analog front end, a differential amplifier, a DSP chip and an optoelectrical coupler; wherein the input end of the analog front end is electrically connected with the wide-range voltage stabilizing module, the output end of the analog front end is electrically connected with the first input end of the differential amplifier, the output end of the differential amplifier is electrically connected with the DSP chip, the output end of the DSP chip is electrically connected with the optoelectrical coupler and the power supply integration module respectively; and the output end of the optoelectrical coupler is electrically connected with the power supply screen.
[0011] Further, the analog front end comprises an operational amplifier, a filter and an analog-digital converter, wherein the receiving end of the operational amplifier is electrically connected with the wide-range voltage stabilizing module, the output end of the operational amplifier is electrically connected with the analog-digital converter through the filter, and the output end of the analog-digital converter is electrically connected with the DSP chip.
[0012] Further, the analog front end further comprises an ESD protection diode, which is installed at the output end of the analog front end.
[0013] Further, the DSP chip adopts TMS320F28335 model.
[0014] The technical scheme of the utility model has at least the following advantages and beneficial effects:
[0015] The utility model discloses a signal mechanical chamber power protection device adopts multistage lightning protection, multiple clipping, peak clipping and anti -interference processing, effectively weakens and filters the multiple harmonic of external power supply, high -frequency peak, makes it satisfy the demand of signal equipment to power supply of back grade, and then adopts the voltage phase of output of DSP differential detection control module and controls, realizes the input power supply of power supply screen and satisfies the technical requirement of two -way input power supply homophase phase difference <5 DEG, ensures the safety of driving, thereby solve the problem of power fluctuation in signal mechanical chamber, and, through circuit structure, the cost of solving this problem is also lower. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a structural schematic view of the utility model;
[0017] Figure 2 It is a structural schematic view of the DSP differential detection control module;
[0018] Figure 3 It is a structural schematic view of the analog front end.
[0019] Figure reference numerals: 1. Power supply integration module; 2. Multi-level lightning protection module; 3. Multi-stage clipping and peak reduction anti-interference module; 4. Comprehensive balancing module; 5. Wide-range voltage regulation module; 6. DSP differential detection module; 61. Analog front end; 611. Operational amplifier; 612. Filter; 613. Analog-to-digital converter; 62. Differential amplifier; 63. DSP chip; 64. Optocoupler; 7. Battery pack and detection module; 8. Power supply panel. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0021] Example 1
[0022] As attached Figure 1 The power supply protection device for a signal machinery room, as shown, includes a power integration module 1, a multi-level lightning protection module 2, a multi-stage clipping and peak-shaving anti-interference module 3, a comprehensive balancing module 4, a wide-range voltage regulation module 5, and a DSP differential detection and control module 6. The input terminal of the power integration module 1 is electrically connected to multiple power supplies, meaning that the power integration module 1 can access multiple power supplies and ultimately select one of them to output to the train signal machinery room. In addition, the power integration module 1 can specifically be a G2 panel, which serves as the first link for power entering the system. The G2 panel may include preliminary protection measures, such as overload protection and short-circuit protection, to ensure the safety of power entering subsequent modules. The output terminal of the power integration module 1 is electrically connected to the multi-level lightning protection module 2.
[0023] The output terminal of the multi-level lightning protection module 2 is electrically connected to the multi-clipping and peak-shaving anti-interference module 3, and the output terminal of the multi-clipping and peak-shaving anti-interference module 3 is electrically connected to the integrated balancing module 4. The multi-level lightning protection module 2 mainly plays the role of protecting the overall system, and performs lightning protection at the source of power input of this system to eliminate and weaken the impact of lightning on the power supply panel 8 and subsequent signal equipment.
[0024] In addition, the multi-stage lightning protection module 2 is composed of three lightning arresters, and the installation positions are dispersed in the system. The first lightning arrester is installed between the power integration module 1 and the multi-stage wave attenuation and crest reduction anti-interference module 3, and the first-stage lightning arrester is usually installed at the incoming line of the building, which is used to defend the high-energy surge generated by direct lightning strike. This kind of lightning arrester can withstand very high current peaks (for example, tens to hundreds of kiloamperes), but the response time is relatively long. The second-stage lightning arrester is installed in the power distribution cabinet or distribution box, that is, between the comprehensive balance module 4 and the wide-range voltage stabilization module 5, which further reduces the residual voltage and protects more sensitive equipment. This level of lightning arrester can handle lower energy levels, but provides faster response time and lower clamping voltage. The third-stage lightning arrester is directly installed in front of the terminal equipment, that is, between the DSP differential detection and control module 6 and the power supply screen 8, such as the signal power supply screen 8 or other key electronic equipment, to prevent any residual transient overvoltage from damaging the equipment. The characteristic of this kind of lightning arrester is that it has extremely low clamping voltage and fast response speed. Through the three lightning arresters, the lightning protection capability of the system can be further improved, and the safe operation of the system can be ensured.
[0025] The multi-stage wave attenuation and crest reduction anti-interference module 3 has the advantages of eliminating high-frequency peak interference of the input power grid and isolating and filtering harmonic interference. The multi-stage wave attenuation and crest reduction anti-interference module 3 can be composed of various types of filters, transient voltage suppressors, surge protection devices, wave attenuation and crest reduction circuits, isolation transformers, active power factor correction circuits, and digital control units. These components work together to effectively eliminate various forms of electromagnetic interference and ensure that the power quality meets the requirements of the railway signal mechanical room power protection device.
[0026] The output end of the comprehensive balance module 4 is electrically connected with the wide-range voltage stabilization module 5, and the output end of the wide-range voltage stabilization module 5 is electrically connected with the DSP differential detection and control module 6. The comprehensive balance module 4 converts the input fluctuating AC voltage into stable DC voltage by rectification and filtering. The wide-range voltage stabilization module 5 is used to output stable, reliable, and high-quality sinusoidal wave power.
[0027] The control output end of the DSP differential detection and control module 6 is electrically connected with the power integration module 1, and the signal output end of the DSP differential detection and control module 6 is electrically connected with the power supply screen 8. The DSP differential detection and control module 6 can detect whether any two power sources input to the power integration module 1 meet the technical requirements of power in-phase voltage difference < 30V° and two-way input power in-phase phase difference < 5°. If the requirements are met, the DSP differential detection and control module 6 sends corresponding control signals to the power integration module 1, so that the two power sources that meet the requirements are subsequently supplied to the power supply screen 8 through the multi-stage lightning protection module 2, the multi-stage wave attenuation and crest reduction anti-interference module 3, the comprehensive balance module 4, the wide-range voltage stabilization module 5, and the DSP differential detection and control module 6, to ensure the safety of train operation.
[0028] In addition, a battery pack and a detection module 7 are provided between the output end of the integrated balancing module 4 and the wide-range voltage regulator module 5. The battery pack can intercept a portion of the power output from the integrated balancing module 4 to the wide-range voltage regulator module 5 for storage, thus serving as a backup power source. The corresponding detection module 7 is used to detect the energy storage status of the battery pack and promptly cut off the charging operation to the battery pack after it is fully charged. Furthermore, as an energy storage unit, the battery pack can also serve as a backup power source to supply power to the wide-range voltage regulator module 5 in case of problems during the power transmission process from the integrated balancing module 4 to the wide-range voltage regulator module 5, ensuring the continuity of power supply to the power supply panel 8.
[0029] Example 2
[0030] like Figure 2 The DSP differential detection module 6 shown includes a differential amplifier 62, an analog front-end 61, a DSP chip 63, and an optocoupler 64; wherein the input terminal of the analog front-end 61 is electrically connected to the wide-range voltage regulator module 5, and the analog front-end 61 is mainly used to process the electrical signals input to the DSP differential detection module 6, including but not limited to signal amplification, filtering, and analog-to-digital conversion.
[0031] The output of the analog front-end 61 is electrically connected to the first input of the differential amplifier 62, and the second input of the differential amplifier 62 is connected to a standard voltage; the output of the differential amplifier 62 is electrically connected to the DSP chip 63, and the output of the DSP chip 63 is electrically connected to the optocoupler 64 and the power integration module 1 respectively; the output of the optocoupler 64 is electrically connected to the power supply panel 8.
[0032] The analog front-end 61 receives signals from various input power supplies connected to the power integration module 1. After processing these signals, the analog front-end 61 outputs them to the DSP chip 63 after judgment by the differential amplifier 62. The DSP chip 63 calculates two types of input power supplies that meet the technical requirements of a voltage difference of <30V and a phase difference of <5V between the two input power supplies, and controls the power integration module 1 to output these two types of input power supplies. The two input power supplies that meet the technical requirements then supply power to the power supply panel 8 through the multi-level lightning protection module 2, the multi-level clipping and peak reduction anti-interference module 3, the comprehensive balance module 4, the wide-range voltage regulation module 5, and the DSP differential detection and control module 6.
[0033] Specifically, the DSP chip 63 is a TMS320F28335 model;
[0034] It supports 32-bit floating-point operations, which is more efficient and accurate than fixed-point DSPs when processing complex algorithms, simplifying numerical calculations in the software development process; and its maximum operating frequency can reach 150MHz (6.67ns cycle time), providing powerful real-time processing capabilities.
[0035] In addition, the DSP chip 63 of this model includes communication interfaces such as SPI, SCI (UART), CAN, etc., facilitating data exchange with other devices, and two independent 12-bit analog-to-digital converters built-in, supporting up to 16 analog input channels, with a sampling rate as high as 12.5 MSPS per second, which is very suitable for application scenarios requiring high-precision analog signal acquisition.
[0036] Embodiment 3
[0037] As shown in the analog front end 61 includes an operational amplifier 611, a filter 612 and an analog-to-digital converter 613, wherein the receiving end of the operational amplifier 611 is electrically connected with the wide-range voltage stabilizing module 5, the output end of the operational amplifier 611 is electrically connected with the analog-to-digital converter 613 through the filter 612, and the output end of the analog-to-digital converter 613 is electrically connected with the DSP chip 63. Figure 3
[0038] The operational amplifier 611 is used for receiving and amplifying electrical signals, the filter 612 is used for removing unwanted noise or interference to ensure signal purity, and the analog-to-digital converter 613 is used for analog-to-digital conversion of the filtered signal, and then transmitting the signal to the first input end of the differential amplifier 62.
[0039] In addition, the analog front end 61 also includes an ESD protection diode, which is installed at the output end of the analog front end 61, and is mainly used to prevent sudden high voltage caused by static electricity accumulation from damaging sensitive electronic components, ensuring that static electricity generated during handling or installation can be safely discharged to the ground without damaging internal circuits, and in this way, the ESD protection diode greatly enhances the stability and reliability of the entire analog front end 61 and even larger systems in the face of unexpected static electricity events.
[0040] The above is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A power supply protection device for a signal machinery room, comprising a power integration module (1), a multi-level lightning protection module (2), a multi-clipping and peak-shaving anti-interference module (3), a comprehensive balancing module (4), a DSP differential detection and control module (6), and a wide-range voltage regulator module (5). The input terminal of the power integration module (1) is electrically connected to multiple power supplies, and the output terminal of the power integration module (1) is electrically connected to the multi-level lightning protection module (2). The output terminal of the multi-level lightning protection module (2) is electrically connected to the multi-clipping and peak-shaving anti-interference module (3), and the output terminal of the multi-clipping and peak-shaving anti-interference module (3) is electrically connected to the comprehensive balancing module (4). The output terminal of the comprehensive balancing module (4) is electrically connected to the wide-range voltage regulator module (5), and the output terminal of the wide-range voltage regulator module (5) is electrically connected to the DSP differential detection and control module (6). The control output terminal of the DSP differential detection and control module (6) is electrically connected to the power integration module (1), and the signal output terminal of the DSP differential detection and control module (6) is electrically connected to the power supply panel (8).
2. The power supply device for the signal machinery room according to claim 1, characterized in that: A battery pack and a detection module (7) are provided between the output end of the integrated balance module (4) and the wide-range voltage regulator module (5).
3. The power supply device for the signal machinery room according to claim 1, characterized in that: The multi-level lightning protection module (2) consists of three lightning arresters.
4. The power supply device for the signal machinery room according to claim 1, characterized in that: The integrated balance module (4) includes a rectifier unit and a filter unit. The input end of the rectifier unit is electrically connected to the multi-clipping and peak-shaving anti-interference module (3). The output end of the rectifier unit is electrically connected to the filter unit. The filter unit is electrically connected to the wide-range voltage regulator module (5).
5. The power supply device for the signal machinery room according to claim 1, characterized in that: The DSP differential detection module (6) includes an analog front-end (61), a differential amplifier (62), a DSP chip (63), and an optocoupler (64); wherein the input terminal of the analog front-end (61) is electrically connected to the wide-range voltage regulator module (5), and the output terminal of the analog front-end (61) is electrically connected to the first input terminal of the differential amplifier (62); the output terminal of the differential amplifier (62) is electrically connected to the DSP chip (63), and the output terminal of the DSP chip (63) is electrically connected to the optocoupler (64) and the power integration module (1) respectively; the output terminal of the optocoupler (64) is electrically connected to the power supply panel (8).
6. The power supply device for the signal machinery room according to claim 5, characterized in that: The analog front end (61) includes an operational amplifier (611), a filter (612), and an analog-to-digital converter (613). The receiving end of the operational amplifier (611) is electrically connected to the wide-range voltage regulator module (5), the output end of the operational amplifier (611) is electrically connected to the analog-to-digital converter (613) through the filter (612), and the output end of the analog-to-digital converter (613) is electrically connected to the DSP chip (63).
7. The power supply device for the signal machinery room according to claim 6, characterized in that: The analog front end (61) also includes an ESD protection diode, which is installed at the output terminal of the analog front end (61).
8. The power supply device for the signal machinery room according to claim 5, characterized in that: The DSP chip (63) is a TMS320F28335.