Split-type direct-current dual-power-supply switching device

Abstract

The utility model relates to the field of power supply control equipment, in particular to a split-type direct-current dual-power-supply switching device, which comprises an alternating-current dual-power-supply switching device electrically connected to a UPS (Uninterrupted Power Supply) and a security power supply, a first switch is electrically connected between the alternating-current dual-power-supply switching device and the UPS, and a second switch is electrically connected between the alternating-current dual-power-supply switching device and the security power supply. The alternating-current dual-power-supply switching device is electrically connected with a plurality of alternating-current loads, and first switches are electrically connected between the alternating-current loads and the alternating-current dual-power-supply switching device; the system further comprises an intelligent direct current power supply device electrically connected to the UPS power supply and the security power supply, second switches are electrically connected between the intelligent direct current power supply device and the UPS power supply and between the intelligent direct current power supply device and the security power supply, and the intelligent direct current power supply device is electrically connected with a plurality of direct current loads. And a second switch is electrically connected between the intelligent direct current power supply device and the direct current load. The utility model can improve the reliability of power supply.

Description

Technical Field

[0001] This utility model relates to the field of power control equipment, specifically to a split-type DC dual power supply switching device. Background Technology

[0002] The power supply system of a Distributed Control System (DCS) is the cornerstone of its stable operation, responsible for providing a reliable and continuous power supply to the entire system. A DCS power supply system typically includes power input sections, power switching sections, and power load sections. DCS power supply systems employ redundant power supply methods to improve system reliability and stability.

[0003] Existing literature describes a DC dual-power automatic switching device. A working mode switching switch is connected to a microprocessor; a charging voltage acquisition module is interconnected with the microprocessor; a communication port is interconnected with the microprocessor; input contacts are unidirectionally connected to the microprocessor; the microprocessor is unidirectionally connected to status indicators and output contacts; the microprocessor is unidirectionally connected to a programmable circuit breaker via a drive module; and a status detector is unidirectionally connected to both the microprocessor and the programmable circuit breaker. This device is capable of DC dual-power switching, exhibiting good switching efficiency and safety. It is suitable for application as a DC dual-power automatic switching device in power equipment.

[0004] However, due to the lack of reliability of current DC power supplies, they cannot continue to supply power to the load when the power supply fails, and there is a lack of real-time monitoring of DC power supplies, making it difficult to detect abnormal power parameters in a timely manner and send early warning signals. Utility Model Content

[0005] The present invention aims to provide a split-type DC dual power supply switching device to solve the problem of not being able to continue supplying power to the load when the power supply fails.

[0006] The split-type DC dual power switching device in this solution includes an AC dual power switching device electrically connected to the UPS power supply and the backup power supply. The AC dual power switching device is electrically connected to the UPS power supply and the backup power supply with a first switch. The AC dual power switching device is electrically connected to multiple AC loads, and the AC loads are electrically connected to the AC dual power switching device with a first switch.

[0007] It also includes an intelligent DC power supply device electrically connected to the UPS power supply and the backup power supply. The intelligent DC power supply device is electrically connected to the UPS power supply and the backup power supply via a second switch. The intelligent DC power supply device is electrically connected to multiple DC loads, and each of the intelligent DC power supply device and the DC loads is electrically connected to a second switch.

[0008] Furthermore, it also includes an online intelligent power monitoring device that provides two AC inputs: a UPS power supply and a security power supply. This online intelligent power monitoring device is electrically connected to multiple AC loads.

[0009] Furthermore, the AC dual power supply switching device includes a controller for performing the switching between UPS power supply and emergency power supply, a power monitor for monitoring the voltage status of UPS power supply and emergency power supply, a switching actuator for switching between UPS power supply and emergency power supply, and a display alarm.

[0010] The power monitor is used to detect the power parameters of the UPS power supply and the emergency power supply. The controller signal is connected to the power monitor and receives the power parameters. The controller signal is connected to the switching actuator and the controller signal is connected to the display alarm.

[0011] Furthermore, the power monitoring device includes a first voltage sensor, a first current sensor, and a frequency monitoring device, and the switching actuator is a contactor or a circuit breaker.

[0012] Furthermore, the intelligent DC power supply device includes a voltage conversion unit that converts high-voltage DC to low-voltage DC, a filtering and voltage regulation unit that reduces voltage fluctuations, a control unit that monitors power parameters and performs intelligent control, and a protection unit that prevents power supply damage.

[0013] The voltage conversion unit is electrically connected to the filter and voltage regulation unit, the filter and voltage regulation unit is electrically connected to the control unit, and the control unit is electrically connected to the protection unit.

[0014] Furthermore, the filtering and voltage regulation unit includes a filtering circuit and a voltage regulation circuit connected in sequence, and the protection unit includes an overvoltage protection circuit, an undervoltage protection circuit, and a short-circuit protection circuit connected in sequence.

[0015] Furthermore, the online intelligent power monitoring device includes a data acquisition unit for collecting power parameters, a processing unit for processing the collected data according to a preset method, and a communication unit for transmitting real-time data to a cloud platform;

[0016] The data acquisition unit is connected to the processing unit, and the processing unit is connected to the communication unit.

[0017] Furthermore, the data acquisition unit includes a second voltage sensor, a second current sensor, and a temperature sensor, and the communication unit is RS485, TCP / IP, or Wi-Fi.

[0018] The beneficial effects of this plan are:

[0019] The design of the AC dual power supply switching device enables rapid switching to the backup power supply when the main power supply fails or is interrupted, ensuring continuous power supply to AC load equipment, improving the reliability and stability of power supply, and realizing automatic switching function, reducing the need for manual intervention and lowering maintenance costs caused by frequent power supply replacement. The design of the online intelligent power monitoring device can collect various power parameters (such as voltage, current, power, etc.) in real time, and analyze and process them through intelligent algorithms. When abnormal power parameters are detected, it can issue early warning signals in a timely manner to remind maintenance personnel to handle the problem and prevent the fault from escalating. The separate design of AC and DC power supplies allows each part to be installed and maintained independently, reducing the difficulty and cost of installation and maintenance. The parts are connected by cables or communication lines, facilitating expansion and upgrades. Attached Figure Description

[0020] Figure 1 This is a circuit diagram of an embodiment of the split-type DC dual power supply switching device of this utility model. Detailed Implementation

[0021] The following detailed description provides further details on specific implementation methods.

[0022] Example

[0023] Split-type DC dual power supply switching device, such as Figure 1 As shown: An AC dual power supply switching device is electrically connected to a UPS power supply and a backup power supply. The AC dual power supply switching device is electrically connected to the UPS power supply and the backup power supply by a first switch. The AC dual power supply switching device is electrically connected to multiple AC loads, and each AC load is electrically connected to the AC dual power supply switching device by a first switch.

[0024] The AC dual power supply switching device includes a controller for switching between UPS power and backup power, a power monitor for monitoring the voltage of the UPS power and backup power, a switching actuator for switching between the UPS power and backup power, and a display and alarm device. The power monitor detects the power parameters of the UPS power and backup power. The controller signal is connected to the power monitor and receives the power parameters. The controller can be an existing PLC controller. The controller signal is connected to the switching actuator and the display and alarm device, which can be implemented using an existing display screen and audible alarm. The power monitor includes a first voltage sensor, a first current sensor, and a frequency monitor. The first voltage sensor can be an existing CHV-6KV-10KV model product, and the current sensor can be an existing product such as the HZM-002 series. The switching actuator is a contactor or circuit breaker. The connections of each part are implemented using existing circuits and will not be described further here.

[0025] It also includes an intelligent DC power supply device electrically connected to the UPS power supply and the backup power supply. The intelligent DC power supply device is electrically connected to the UPS power supply and the backup power supply via a second switch. The intelligent DC power supply device is electrically connected to multiple DC loads, and each of the intelligent DC power supply device and the DC loads is electrically connected to a second switch.

[0026] The intelligent DC power supply device includes a voltage conversion unit that converts high-voltage DC to low-voltage DC, a filtering and regulating unit that reduces voltage fluctuations, a control unit that monitors power parameters and performs intelligent control, and a protection unit that prevents power supply damage. The voltage conversion unit is electrically connected to the filtering and regulating unit. If an existing transformer is used, the voltage conversion unit first converts 220V or 380V AC to low-voltage AC. Then, an existing rectifier circuit converts the AC voltage output from the transformer into a unidirectional pulsating DC voltage. For example, diodes and other components with unidirectional conductivity are often used in the rectifier circuit to maintain a unidirectional DC voltage. The filtering and regulating unit is electrically connected to the control unit. It uses existing energy storage components such as capacitors and inductors to filter out the pulsating components in the DC voltage output from the rectifier circuit, making the output voltage smoother. The existing regulating circuit adjusts the power output or changes the internal operating state of the power supply to maintain a stable output voltage of 24V. The control unit is electrically connected to the protection unit. The control unit can use an existing microprocessor or control chip, such as a SOC signal. The filtering and voltage regulation unit includes a filtering circuit and a voltage regulation circuit connected in sequence. The protection unit includes an overvoltage protection circuit, an undervoltage protection circuit, and a short circuit protection circuit connected in sequence. Existing circuits can be used, and will not be described in detail here.

[0027] It also includes an online intelligent power monitoring device that connects two AC inputs, one for UPS power and one for backup power, and the online intelligent power monitoring device is electrically connected to multiple AC loads.

[0028] The online intelligent power monitoring device employs a dual-module parallel redundant mode to provide a reliable DC power supply to the 24V DC load. The 24V intelligent DC power supply has an automatic current sharing output function and provides intelligent monitoring. It displays the output current, voltage, and internal temperature of the two power modules on a color LCD screen and provides fault records for abnormal conditions.

[0029] The online intelligent power monitoring device includes a data acquisition unit for collecting power parameters, a processing unit for processing the collected data according to a preset method, and a communication unit for transmitting real-time data to a cloud platform. The preset method can be existing comparative analysis algorithms or other methods pre-installed according to actual needs, which will not be elaborated here. The data acquisition unit is connected to the processing unit, and the processing unit is connected to the communication unit. The processing unit can use an existing SOC chip. The data acquisition unit includes a second voltage sensor, a second current sensor, and a temperature sensor. All sensors use existing sensor products. The communication unit can be RS485, TCP / IP, or Wi-Fi.

[0030] The AC switching section of the AC dual power supply switch uses high-speed static contactless switching, which has the following advantages:

[0031] Fully digital control, strong anti-interference capability, and fast computing speed;

[0032] AC switching time ≤5ms, high reliability;

[0033] The AC switch has overload capability and can withstand full load startup;

[0034] The AC input has protection functions such as automatic switching when the AC input is undervoltage.

[0035] The AC switch has a bypass power supply function to ensure reliable power supply to AC loads;

[0036] Online intelligent monitoring of the voltage and load current status of three power supplies: UPS power supply, emergency power supply, and AC load power supply;

[0037] The data from the online intelligent monitoring is uploaded to the backend software via the RS485 communication interface.

[0038] The switching device described above was tested, and the testing procedures are as follows:

[0039] Test items: Rated (input) voltage: AC 85V~264V, the device can work normally within the full voltage input range.

[0040] Environmental conditions: Temperature, 25℃; Humidity, 56%RH.

[0041] The test method involves input voltage from a variable voltage generator;

[0042] 1. The power supply intelligent control system ensures that the backup power input is not supplied, and the main power input voltage is adjusted to the minimum value of 85V and the maximum value of 264V within the input voltage tolerance range. The output voltage remains at the normal output voltage.

[0043] 2. The main power input of the intelligent power control system is not supplied, and the backup power input voltage is adjusted to the minimum value of 85V and the maximum value of 264V within the input voltage tolerance range. The test pieces for the rated (input) voltage are shown in Table 1.

[0044] Table 1 Rated (Input) Voltage Test Table

[0045]

[0046] Judgment Requirements: The intelligent power supply control system should function normally within the input voltage range. The output voltage should remain within the normal range. The LCD screen should display the normal voltage and waveform. Test Result Description: See Table 1; the intelligent power supply control system functions normally.

[0047] Test items: Rated current: 100A load current, short circuit withstand current ≥5kA (10ms); Environmental conditions: Temperature: 25℃; Humidity: 56%RH.

[0048] Test method: With the power supply intelligent control system in operation, a test AC current of 5KA with a frequency of 50HZ was applied to its output terminal for a duration of 10ms, and the results are shown in Table 2.

[0049] Table 2 Insulation withstand voltage test table

[0050]

[0051] Judgment requirements: No flame emission; no melting or burning particles on components. No electric arc between live parts and the casing. Connecting wires must not be pulled out of their terminals; conductors and conductor insulation must be undamaged. The system should pass the insulation withstand voltage test after the test. The system should function normally.

[0052] Test results description: See Table 2. After the short-circuit withstand current test, the insulation withstand voltage test of the power intelligent control system meets the requirements, and the power intelligent control system can work normally.

[0053] The operating temperature range of the device is -25℃ to 85℃ (forced air cooling is required when the ambient temperature is ≥55℃).

[0054] Test method:

[0055] Initial tests showed that the intelligent power control system was operating normally.

[0056] The system is running in normal mode.

[0057] Test sequence: 1. Dry and wet test: temperature 85℃, duration 16h; 2. Damp heat test: normal environmental conditions, temperature 30°±2℃, relative humidity 82%~88%, duration 96h; 3. Low temperature test: temperature -25℃, duration 2h; 4. Damp heat test: normal environmental conditions, 30°±2℃, relative humidity 82%~88%, duration 96h; d. During the test, the intelligent power supply control system operated normally. e. Final test: same as the initial test. The test results are shown in Table 3.

[0058] Table 3 Temperature and Humidity Test Table

[0059]

[0060] Judgment criteria: After the test, the intelligent power supply control system operates normally and meets the structural safety requirements.

[0061] Test results description: See Table 3. After the temperature and humidity test, the power intelligent control system meets the structural safety requirements and can work normally.

[0062] System power failure test: switching time ≤ 5ms.

[0063] Test Method: 1. The nominal input voltage for both the main and backup circuits is 220VAC. 2. When the main power input is interrupted, the intelligent power control system should switch from the main circuit to the backup circuit. When the main voltage returns to normal, the intelligent power control system should switch back from the backup circuit to the main circuit. The switching waveform and the switching time can be viewed on the LCD screen. 3. When the system is operating on the backup circuit, if the main voltage recovers but has not yet switched back, and the backup circuit loses voltage, the system should switch back from the backup circuit to the main circuit.

[0064] Table 4: System Power Failure Test

[0065]

[0066] Judgment requirement: The switching time of the intelligent power control system is ≤5ms.

[0067] Test results description: See Table 4. The system power failure switching time is ≤5ms, which meets the system switching time requirements. The output voltage and waveform meet the requirements, and the intelligent power supply control system is working normally.

[0068] System voltage drop test: When the voltage drops below the threshold, the system switches according to the user-defined time.

[0069] Test Method: 1. Input voltage is generated by a voltage variable generator. The initial input voltage of the main and backup power supplies is 220VAC. 2. Slowly decrease the main input voltage until switching to the backup circuit. Undervoltage switching voltage: 179V (±5%). Slowly increase the main input voltage until the restored voltage is 186V (±5%), at which point the backup circuit switches back to the main circuit.

[0070] Table 5: System Undervoltage Test Table

[0071]

[0072] Judgment requirements: When the main circuit voltage of the power supply intelligent control system is lower than the threshold of 179V, the main circuit normally switches to the backup circuit, and the main circuit input voltage is slowly increased until it recovers to 186V. The backup circuit then switches back to the main circuit. The switching time meets the system requirement: ≤5ms. The output voltage waveform is normal.

[0073] Test results description: See Table 5. System voltage drop: When the voltage drops below the threshold, the system can switch normally, and the switching time meets the requirements. The intelligent power control system is working normally.

[0074] Compared to existing technologies, this embodiment, through the design of an AC dual power supply switching device, can quickly switch to the backup power supply when the main power supply fails or is interrupted, ensuring continuous power supply to AC load equipment, improving the reliability and stability of power supply, and realizing automatic switching function, reducing the need for manual intervention and lowering maintenance costs caused by frequent power supply replacement. The design of the online intelligent power monitoring device can collect various power parameters (such as voltage, current, power, etc.) in real time, and analyze and process them through intelligent algorithms. When abnormal power parameters are detected, it can issue early warning signals in a timely manner to remind maintenance personnel to handle the situation and prevent the fault from escalating. The separate design of AC and DC power supplies allows each part to be installed and maintained independently, reducing the difficulty and cost of installation and maintenance. The parts are connected by cables or communication lines, facilitating expansion and upgrades.

[0075] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A split-type DC dual power supply switching device, characterized in that: The device includes an AC dual power supply switching device electrically connected to a UPS power supply and a backup power supply. The AC dual power supply switching device is electrically connected to a first switch both between itself and the UPS power supply and between itself and the backup power supply. The AC dual power supply switching device is electrically connected to multiple AC loads, and each AC load is electrically connected to the AC dual power supply switching device via a first switch. It also includes an intelligent DC power supply device electrically connected to the UPS power supply and the backup power supply. The intelligent DC power supply device is electrically connected to the UPS power supply and the backup power supply via a second switch. The intelligent DC power supply device is electrically connected to multiple DC loads, and each of the intelligent DC power supply device and the DC loads is electrically connected to a second switch.

2. The split-type DC dual power supply switching device according to claim 1, characterized in that: It also includes an online intelligent power monitoring device that connects two AC inputs, one for UPS power and one for backup power, and the online intelligent power monitoring device is electrically connected to multiple AC loads.

3. The split-type DC dual power supply switching device according to claim 1, characterized in that: The AC dual power supply switching device includes a controller for performing the switching between UPS power supply and emergency power supply, a power monitor for monitoring the voltage of UPS power supply and emergency power supply, a switching actuator for switching between UPS power supply and emergency power supply, and a display and alarm device. The power monitor is used to detect the power parameters of the UPS power supply and the emergency power supply. The controller signal is connected to the power monitor and receives the power parameters. The controller signal is connected to the switching actuator and the controller signal is connected to the display alarm.

4. A split-type DC dual power supply switching device according to claim 3, characterized in that: The power monitoring device includes a first voltage sensor, a first current sensor, and a frequency monitor, and the switching actuator is a contactor or a circuit breaker.

5. A split-type DC dual power supply switching device according to claim 1, characterized in that: The intelligent DC power supply device includes a voltage conversion unit that converts high-voltage DC to low-voltage DC, a filtering and voltage regulation unit that reduces voltage fluctuations, a control unit that monitors power parameters and performs intelligent control, and a protection unit that prevents power supply damage. The voltage conversion unit is electrically connected to the filter and voltage regulation unit, the filter and voltage regulation unit is electrically connected to the control unit, and the control unit is electrically connected to the protection unit.

6. A split-type DC dual power supply switching device according to claim 5, characterized in that: The filtering and voltage regulation unit includes a filtering circuit and a voltage regulation circuit connected in sequence, and the protection unit includes an overvoltage protection circuit, an undervoltage protection circuit, and a short circuit protection circuit connected in sequence.

7. A split-type DC dual power supply switching device according to claim 2, characterized in that: The online intelligent power monitoring device includes a data acquisition unit for collecting power parameters, a processing unit for processing the collected data according to a preset method, and a communication unit for transmitting real-time data to a cloud platform. The data acquisition unit is connected to the processing unit, and the processing unit is connected to the communication unit.

8. A split-type DC dual power supply switching device according to claim 7, characterized in that: The data acquisition unit includes a second voltage sensor, a second current sensor, and a temperature sensor, and the communication unit is RS485, TCP / IP, or Wi-Fi.

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