Distribution network power supply on-line maintenance device and equipment

Abstract

The utility model belongs to the technical field of distribution network power supplies, and discloses a distribution network power supply on-line maintenance device and equipment, comprising an AC conversion module, a battery, a boost module, a control module, a sensing module, a discharge switch and a discharge load, the battery is respectively connected with the AC conversion module, the boost module, the control module and the sensing module, the AC conversion module is also connected with the boost module, the discharge switch is connected in series with the discharge load, and the battery is connected in parallel with the discharge switch and the discharge load; the sensing module comprises a voltage acquisition unit, a temperature acquisition unit and an internal resistance acquisition unit, the control module is respectively connected with the voltage acquisition unit, the temperature acquisition unit and the internal resistance acquisition unit, and the voltage acquisition unit, the temperature acquisition unit and the internal resistance acquisition unit are respectively used for acquiring voltage, temperature and internal resistance of a battery. The utility model aims to improve the maintenance convenience of the distribution network power supply and reduce the maintenance cost.

Description

Technical Field

[0001] The utility model relates to the technical field of distribution network power supply, in particular to an online maintenance device and equipment for distribution network power supply. Background Art

[0002] With the development of power networks, the stability of distribution systems has become a critical component in ensuring their normal operation. A key component of this system is the power supply, which works in conjunction with the main grid. This power supply provides power in emergencies, such as AC power outages or power failures. Therefore, to ensure the proper functioning of these power supplies, regular power capacity verification and maintenance are required. However, current maintenance methods require significant modifications to the existing distribution system circuitry to collect power-related data. This can easily impact existing circuitry and result in high maintenance costs. Utility Model Content

[0003] The purpose of the present utility model is to provide an online maintenance device and equipment for a distribution network power supply, so as to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The solution of the utility model to solve its technical problems is:

[0005] Provided is an online maintenance device for a distribution network power supply, comprising: an AC conversion module, a battery, a boost module, a control module, a sensor module, a discharge switch, and a discharge load, wherein the battery is connected to the AC conversion module, the boost module, and the sensor module, respectively; the AC conversion module is also connected to the boost module and the control module, respectively; the discharge switch is connected in series with the discharge load; and the battery is connected in parallel with the discharge switch and the discharge load;

[0006] The AC conversion module is used to: connect to an external power line and convert the AC power of the power line into DC power of a first voltage, the DC power of the first voltage is used for floating charge of the battery and provides power for the boost module;

[0007] The boost module is used to: connect to an external output bus, convert the DC power provided by the AC conversion module or the battery into DC power of a second voltage, and output the DC power of the second voltage to the output bus;

[0008] The discharge load is used as a load when the battery is discharging, and the discharge switch is used to control the battery to switch between a floating charge state and a discharge state;

[0009] The sensing module includes a voltage acquisition unit, a temperature acquisition unit, and an internal resistance acquisition unit. The control module is connected to the voltage acquisition unit, the temperature acquisition unit, and the internal resistance acquisition unit, respectively. The control module is used to control the voltage acquisition unit, the temperature acquisition unit, and the internal resistance acquisition unit. The voltage acquisition unit is used to acquire the voltage of the battery, the temperature acquisition unit is used to acquire the battery temperature of the battery, and the internal resistance acquisition unit is used to acquire the internal resistance of the battery.

[0010] Optionally, the number of the batteries is at least 2, the number of the AC conversion modules and the boost modules is the same as the number of the batteries, and each battery is respectively connected to a different AC conversion module and a different boost module.

[0011] Optionally, each of the boost modules is connected to the output bus, so that each of the boost modules outputs direct current of the second voltage in a uniform manner.

[0012] Optionally, the sensing module further includes an ambient temperature acquisition unit, the control module is connected to the ambient temperature acquisition unit, the control module is used to control the ambient temperature acquisition unit, and the ambient temperature unit is used to acquire the ambient temperature of the surrounding environment.

[0013] Optionally, the control module includes a discharge control unit, which is connected to the AC conversion module and the discharge switch respectively, and is used to control the AC conversion module to reduce or increase the voltage of the output DC power, and control the discharge switch to open or close.

[0014] Optionally, the distribution network power supply online maintenance device further includes a touch screen and an LCD interface, the control module is connected to the touch screen via the LCD interface, and the touch screen is used to receive touch operations and display set light and shadow content.

[0015] Optionally, the distribution network power supply online maintenance device further includes a communication serial port, which is connected to the control module and is used to communicate with external equipment.

[0016] Optionally, the distribution network power supply online maintenance device further includes a storage unit, which is connected to the control module and the sensor module respectively, and is used to record the collected data of the sensor module and the operating data of the control module.

[0017] Optionally, the sensing module and the control module are integrated into a PCB board, and the PCB board is treated to be moisture-proof.

[0018] In addition, a distribution network power supply online maintenance device is provided, comprising the distribution network power supply online maintenance device as described in any one of the above items, and further comprising: a battery base, a battery pressure bar, a device housing and a bracket;

[0019] The battery is arranged on the battery base, the battery pressure strip is arranged above the battery, and the two ends of the battery pressure strip are respectively fixedly connected to the two sides of the battery base, and the battery pressure strip is used to fix the battery on the battery base;

[0020] The device housing is used to provide a housing structure for the AC conversion module, the boost module, the control module and the sensor module. The battery base is arranged above the device housing, and the bracket is arranged on both sides of the battery base and the device housing. The bracket is used to provide support for the battery base and the device housing.

[0021] The beneficial effects of the present invention are as follows: the AC conversion module is connected to the external power line, the AC power transmitted by the power line is converted into DC power of a first voltage, the DC power of the first voltage is used for floating charge of the battery and to provide power for the boost module, the boost module converts the received DC power into DC power of a second voltage and outputs it to the output bus, thereby realizing the normal power supply function of the distribution network system, and when the discharge switch is closed, the battery can be switched from the floating charge state to the discharge state, with the discharge load serving as the main load during battery discharge, while the battery discharge is switched to provide power for the boost module, without affecting the power supply function of the distribution network system, at the same time, through the additional integrated sensor module and control module, the battery voltage, battery temperature and internal resistance in the discharge state can be collected to complete the battery capacity verification, compared with the need for large-scale changes to the distribution network circuit, the battery capacity verification can be completed based on the discharge switch, the integrated sensor module and the control module, thereby improving the convenience of distribution network power maintenance and reducing maintenance costs. In addition, when the battery is in a floating charge state, the sensor module can also monitor the battery voltage, battery temperature and internal resistance, which is helpful for understanding the battery status and improving the reliability of the distribution network system when the AC power is lost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief description of the drawings required for describing the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of them. Those skilled in the art can also derive other design solutions and drawings based on these drawings without inventive effort.

[0023] Figure 1 This is a connection diagram of the power supply circuit in an online maintenance device for a distribution network power supply of the present utility model;

[0024] Figure 2This is a schematic diagram of the framework of an online maintenance device for a distribution network power supply according to the present invention;

[0025] Figure 3 The utility model is a structural diagram of an online maintenance device for distribution network power supply. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0027] It should be noted that although the system diagrams illustrate functional module divisions and the flowcharts illustrate logical sequences, in certain circumstances, the steps shown or described may be performed in a sequence that differs from the module divisions in the system or the sequence in the flowcharts. The terms "first," "second," and so on, in the specification, claims, and drawings, are used to distinguish similar items and are not necessarily used to describe a specific sequence or precedence.

[0028] The utility model provides an online maintenance device for distribution network power supply, referring to Figure 1 and Figure 2 The distribution network power supply online maintenance device includes: an AC conversion module 110, a battery 300, a boost module 120, a control module 130, a sensor module 140, a discharge switch 150 and a discharge load 160. The battery 300 is connected to the AC conversion module 110, the boost module 120 and the sensor module 140 respectively. The AC conversion module 110 is also connected to the boost module 120 and the control module 130 respectively. The discharge switch 150 is connected in series with the discharge load 160, and the battery 300 is connected in parallel with the discharge switch 150 and the discharge load 160.

[0029] The AC conversion module 110 is used to connect to an external power line and convert the AC power of the power line into DC power of a first voltage. The DC power of the first voltage is used for floating charging of the battery 300 and provides power for the boost module 120.

[0030] The boost module 120 is used to connect to an external output bus, convert the DC power provided by the AC conversion module 110 or the battery 300 into DC power of a second voltage, and output the DC power of the second voltage to the output bus.

[0031] The discharge load 160 is used as a load when the battery 300 is discharging, and the discharge switch 150 is used to control the battery 300 to switch between a floating charge state and a discharge state.

[0032] The sensing module 140 includes a voltage acquisition unit 141, a temperature acquisition unit 142 and an internal resistance acquisition unit 143. The control module 130 is connected to the voltage acquisition unit 141, the temperature acquisition unit 142 and the internal resistance acquisition unit 143 respectively. The control module 130 is used to control the voltage acquisition unit 141, the temperature acquisition unit 142 and the internal resistance acquisition unit 143. The voltage acquisition unit 141 is used to acquire the voltage of the battery 300, the temperature acquisition unit 142 is used to acquire the battery temperature of the battery 300, and the internal resistance acquisition unit 143 is used to acquire the internal resistance of the battery 300.

[0033] It should be noted that Figure 1 This is a connection diagram of the power supply circuit. L and N are used to represent power lines. The output end of the boost module 120 is connected to the output bus. The battery 300, the discharge switch 150, and the discharge load 160 are all represented by the component symbols in the dotted box. Figure 1 The connection relationship with the control module 130 and the sensor module 140 is not shown; Figure 2 The control module 130 and Figure 1 The AC conversion module 110 is connected to the discharge switch 150, and the sensor module 140 is connected to the Figure 1 The battery 300 is connected.

[0034] Specifically, the first voltage is 12V. The AC conversion module 110 is connected to the power line and converts 220V AC power into 12V DC power. The 12V DC power is used to float charge the battery 300 and provide power to the boost module 120. The second voltage is 48V. The boost module 120 converts the received DC power into 48V DC power and outputs it to the output bus. This is the operating state of the distribution network system when the power line is normally providing AC power. The discharge switch 150 is connected in series with the discharge load 160 and is connected in parallel with the battery 300 between the AC conversion module 110 and the boost module 120. When the power line loses power, the discharge switch 150 closes, which converts the battery 300 into a discharge state. The discharge load 160 becomes the primary load consuming power at this time. At the same time, the discharge current is transmitted to the boost module 120 to maintain normal power supply of the distribution network system.

[0035] When the battery 300 needs to be capacity-checked, the control module 130 controls the closing of the discharge switch 150 and reduces the output voltage of the AC conversion module 110 to simulate a power failure. The voltage acquisition unit 141 is then controlled to collect the voltage of the battery 300 at this time, the temperature acquisition unit 142 collects the battery temperature of the battery 300 at this time, and the internal resistance acquisition unit 143 collects the internal resistance of the battery 300 at this time. The capacity of the battery 300 is evaluated based on the voltage, battery temperature, and internal resistance to complete the capacity check.

[0036] Compared with the requirement to make large-scale changes to the distribution network circuit, which affects the original AC conversion module 110 and the boost module 120 to complete the capacity control, this embodiment can complete the capacity control of the battery 300 based on the discharge switch 150, the integrated sensor module 140 and the control module 130, thereby improving the convenience of maintaining the distribution network power supply and reducing maintenance costs.

[0037] Furthermore, in this embodiment, the number of batteries 300 is at least 2, the number of AC conversion modules 110 and boost modules 120 is the same as that of batteries 300, and each battery 300 is connected to a different AC conversion module 110 and a different boost module 120.

[0038] In order to ensure that the battery 300 does not affect the normal operation of the distribution network system when the battery 300 is fully charged, the number of batteries 300 is set to at least 2. Figure 1 For each battery 300, there is a corresponding AC conversion module 110 and a boost module 120 connected to the battery 300, so that each battery 300 can work independently. In this way, when one of the batteries 300 is overloaded, the other batteries 300 can take on the function of backup power supply in the event of power failure, avoiding interference with the operation of the distribution network system caused by overload, further improving the convenience of overload operation, and reducing maintenance costs.

[0039] Furthermore, in this embodiment, each boost module 120 is connected to the output bus, so that each boost module 120 outputs direct current of the second voltage in a uniform manner.

[0040] Each boost module 120 is connected to the output bus and outputs 48V DC power to achieve current-balanced output, so that the distribution network system provides stable DC power supply and provides stability of the power supply of the distribution network system.

[0041] Further, in this embodiment, referring to Figure 2 The sensing module 140 further includes an ambient temperature acquisition unit 144 . The control module 130 is connected to the ambient temperature acquisition unit 144 . The control module 130 is used to control the ambient temperature acquisition unit 144 . The ambient temperature unit is used to acquire the ambient temperature of the surrounding environment.

[0042] Specifically, in order to further improve the accuracy of the capacity verification, the sensor module 140 also includes an ambient temperature acquisition unit 144, which controls the ambient temperature acquisition unit through the control module 130 to collect the ambient temperature of the surrounding environment of the device when the battery 300 is verified, and takes into account the impact of the ambient temperature on the battery capacity, thereby improving the accuracy of the capacity verification.

[0043] Furthermore, in this embodiment, the control module 130 includes a discharge control unit (not shown in the figure), which is connected to the AC conversion module 110 and the discharge switch 150 respectively. The discharge control unit is used to: control the AC conversion module 110 to reduce or increase the voltage of the output DC power, and control the discharge switch 150 to open or close.

[0044] Specifically, the control module 130 includes a discharge control unit, which controls the battery 300 to switch between a floating charge state and a discharge state through the discharge control unit, that is, controls the discharge switch 150 to be closed, and reduces the voltage of the output DC power of the AC conversion module 110, so that the battery 300 switches to the discharge state, thereby performing capacity core charging; when the discharge switch 150 is controlled to be disconnected and the voltage of the output DC power of the AC conversion module 110 is increased to the first voltage, the battery 300 switches back to the floating charge state, thereby ending the capacity core charging of the battery 300.

[0045] By integrating the discharge control unit into the control module 130 , convenient control of switching between the floating charge state and the discharge state of the battery 300 is achieved, further improving the convenience of core capacity operation and reducing maintenance costs.

[0046] Further, in this embodiment, referring to Figure 2 The distribution network power supply online maintenance device also includes a touch screen 172 and an LCD interface 171. The control module 130 is connected to the touch screen 172 through the LCD interface 171. The touch screen 172 is used to receive touch operations and display set light and shadow content.

[0047] Specifically, the touch screen 172 is an LCD touch screen with a touch function. The touch screen 172 displays set light and shadow content. When the battery 300 is being checked for capacity, the light and shadow content may include the voltage, battery temperature, internal resistance, and ambient temperature of the battery 300 collected by the sensor module 140, so that the user can directly obtain it through the touch screen 172. When the battery 300 is not checked for capacity, the light and shadow content may also include the current voltage, battery temperature, and internal resistance of each battery, as well as the ambient temperature around the device, to monitor the operation of the distribution network system. In addition, the user can input touch operations through the touch screen 172 to control whether the distribution network system performs capacity checking for the battery 300 or performs set control functions through touch operations.

[0048] By setting the touch screen 172 as the interface for the distribution network power supply online maintenance device to interact with the user, the user can intuitively obtain the nuclear capacity and monitoring data through the light and shadow content displayed on the touch screen 172, and it is also beneficial for the user to directly input touch operations through the touch screen 172 to control the device, thereby improving the convenience of maintenance work of the distribution network power supply online maintenance device.

[0049] Further, in this embodiment, referring to Figure 2 The distribution network power supply online maintenance device further includes a communication serial port 180 , which is connected to the control module 130 and is used to communicate with external devices.

[0050] Specifically, the communication serial port 180 is an RS485 interface, which is used to communicate with other external devices to meet the communication requirements of the distribution network power supply online maintenance device and other devices or equipment, and expand the functions of the device.

[0051] Further, in this embodiment, referring to Figure 2 The distribution network power supply online maintenance device further includes a storage unit 190 , which is connected to the control module 130 and the sensor module 140 , respectively. The storage unit 190 is used to record the collected data of the sensor module 140 and the operating data of the control module 130 .

[0052] Specifically, the storage unit 190 stores the data collected by the voltage acquisition unit 141, the temperature acquisition unit 142, the internal resistance acquisition unit 143 and the ambient temperature acquisition unit 144, and can also store the operating data of the control module 130. For example, the operating data includes the charge and discharge records and alarm records of each battery 300.

[0053] By setting up a storage unit 190 to record data, data management and control can be achieved. It can also support the retrieval of data stored in the storage unit 190 through touch operations on the touch screen 172, which is beneficial for users to carry out maintenance work based on the stored data and improve the effectiveness of maintenance work.

[0054] In addition, the control module 130 includes a main control unit (not shown in the figure), namely a main control MCU, which is different from the discharge control unit. The main control unit is used to implement the control functions of the voltage acquisition unit 141, the temperature acquisition unit 142, the internal resistance acquisition unit 143, the ambient temperature acquisition unit 144, the touch screen 172, the communication serial port 180 and the storage unit 190 as described above. In this embodiment, the main control unit and the discharge control unit are integrated into the control module 130.

[0055] Furthermore, in this embodiment, the sensor module 140 and the control module 130 are integrated into a PCB board, and the PCB board is treated to be moisture-proof.

[0056] In order to prevent the humid environment from affecting the operating conditions of each module or unit, the PCB board integrating the sensor module 140 and the control module 130 is treated with moisture-proof treatment to improve the reliability of the distribution network power supply online maintenance device in a humid environment.

[0057] In addition, in other embodiments, in order to avoid the impact of the hot environment on the operating conditions of each module or unit, or to improve the heat dissipation capacity of the device, the distribution network power supply online maintenance device also includes a fan module, and the control module 130 is connected to the fan module to control the start and stop of the fan, thereby improving the heat dissipation capacity of the distribution network power supply online maintenance device through the fan module.

[0058] In addition, the utility model also proposes a distribution network power supply online maintenance device, referring to Figure 3 , including the distribution network power supply online maintenance device as described in any of the above embodiments, the distribution network power supply online maintenance device also includes: a battery base 410, a battery pressure bar 420, a device housing 100 and a bracket 200.

[0059] The battery 300 is arranged on the battery base 410, and the battery pressure strip 420 is arranged above the battery 300. The two ends of the battery pressure strip 420 are fixedly connected to the two sides of the battery base 410 respectively. The battery pressure strip 420 is used to fix the battery 300 on the battery base 410.

[0060] The device housing 100 is used to provide a housing structure for the AC conversion module 110, the boost module 120, the control module 130 and the sensor module 140. The battery base 410 is arranged above the device housing 100, and the bracket 200 is arranged on both sides of the battery base 410 and the device housing 100. The bracket 200 is used to provide support for the battery base 410 and the device housing 100.

[0061] like Figure 3 Taking the example of two batteries 300, two batteries 300 are mounted on a battery base 410. A battery pressure bar 420 is positioned above the batteries 300, and the two ends of the battery pressure bar 420 are fixedly connected to the two sides of the battery base 410, thereby securing the batteries 300 to the battery base 410. The AC conversion module 110, boost module 120, control module 130, and sensor module 140 are housed within the device housing 100. Furthermore, the LCD interface 171, communication serial port 180, and storage unit 190 are also housed within the device housing 100. The touch screen 172 is positioned on the front of the device housing 100. The battery base 410 is positioned above the device housing 100. A connection interface (not shown) is provided between the battery base 410 and the device housing 100 to connect the batteries 300 to the various modules and units within the device housing 100. The bracket 200 includes a left bracket and a right bracket, which are respectively arranged on both sides of the device housing 100 and the battery base 410. The left bracket and the right bracket are both provided with a protrusion on one side relative to the device housing 100. The protrusion is used to support the device housing 100, so that the bracket 200 can provide support for the battery base 410 and the device housing 100.

[0062] The battery 300 is placed on the battery base 410, and the various modules and units of the device are accommodated by the device housing 100, so as to protect the various components and modularize the distribution network power supply online maintenance device, which is convenient for the installation of the device or equipment.

[0063] The above specifically describes the preferred embodiments of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A distribution network power supply online maintenance device, characterized in that: The distribution network power supply online maintenance device includes: an AC conversion module, a battery, a boost module, a control module, a sensor module, a discharge switch and a discharge load, wherein the battery is connected to the AC conversion module, the boost module and the sensor module respectively, the AC conversion module is also connected to the boost module and the control module respectively, the discharge switch is connected in series with the discharge load, and the battery is connected to the discharge switch and the discharge load in parallel; The AC conversion module is used to: connect to an external power line and convert the AC power of the power line into DC power of a first voltage, the DC power of the first voltage is used for floating charge of the battery and provides power for the boost module; The boost module is used to: connect to an external output bus, convert the DC power provided by the AC conversion module or the battery into DC power of a second voltage, and output the DC power of the second voltage to the output bus; The discharge load is used as a load when the battery is discharging, and the discharge switch is used to control the battery to switch between a floating charge state and a discharge state; The sensing module includes a voltage acquisition unit, a temperature acquisition unit, and an internal resistance acquisition unit. The control module is connected to the voltage acquisition unit, the temperature acquisition unit, and the internal resistance acquisition unit, respectively. The control module is used to control the voltage acquisition unit, the temperature acquisition unit, and the internal resistance acquisition unit. The voltage acquisition unit is used to acquire the voltage of the battery, the temperature acquisition unit is used to acquire the battery temperature of the battery, and the internal resistance acquisition unit is used to acquire the internal resistance of the battery.

2. The online maintenance device for distribution network power supply according to claim 1, characterized in that: The number of the batteries is at least 2, the number of the AC conversion modules and the boost modules is the same as the number of the batteries, and each battery is connected to a different AC conversion module and a different boost module respectively.

3. The online maintenance device for distribution network power supply according to claim 2, characterized in that: Each of the boost modules is connected to the output bus, so that each of the boost modules can output direct current of the second voltage in a uniform manner.

4. The online maintenance device for distribution network power supply according to claim 1, characterized in that: The sensing module further includes an ambient temperature acquisition unit. The control module is connected to the ambient temperature acquisition unit. The control module is used to control the ambient temperature acquisition unit. The ambient temperature unit is used to acquire the ambient temperature of the surrounding environment.

5. The online maintenance device for distribution network power supply according to claim 1, characterized in that: The control module includes a discharge control unit, which is connected to the AC conversion module and the discharge switch respectively. The discharge control unit is used to control the AC conversion module to reduce or increase the voltage of the output DC power and control the discharge switch to open or close.

6. The online maintenance device for distribution network power supply according to claim 5, characterized in that: The distribution network power supply online maintenance device also includes a touch screen and an LCD interface. The control module is connected to the touch screen through the LCD interface. The touch screen is used to receive touch operations and display set light and shadow content.

7. The online maintenance device for distribution network power supply according to claim 1, characterized in that: The distribution network power supply online maintenance device further comprises a communication serial port, which is connected to the control module and is used to communicate with external equipment.

8. The online maintenance device for distribution network power supply according to claim 1, characterized in that: The distribution network power supply online maintenance device further includes a storage unit, which is connected to the control module and the sensor module respectively, and is used to record the collected data of the sensor module and the operating data of the control module.

9. The online maintenance device for distribution network power supply according to claim 1, characterized in that: The sensor module and the control module are integrated into a PCB board, and the PCB board is treated to be moisture-proof.

10. A distribution network power supply online maintenance device, characterized in that: The distribution network power supply online maintenance device comprises the distribution network power supply online maintenance device according to any one of claims 1 to 9, and the distribution network power supply online maintenance device further comprises: a battery base, a battery pressure bar, a device housing and a bracket; The battery is arranged on the battery base, the battery pressure strip is arranged above the battery, and the two ends of the battery pressure strip are respectively fixedly connected to the two sides of the battery base, and the battery pressure strip is used to fix the battery on the battery base; The device housing is used to provide a housing structure for the AC conversion module, the boost module, the control module and the sensor module. The battery base is arranged above the device housing, and the bracket is arranged on both sides of the battery base and the device housing. The bracket is used to provide support for the battery base and the device housing.

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