CN216564598U

CN216564598U - Alternating current-direct current integrated power supply system

Info

Publication number: CN216564598U
Application number: CN202123400739.6U
Authority: CN
Inventors: 张伟莉; 郑镇江
Original assignee: Guangdong Automation Electrical Stock Co ltd
Current assignee: Guangdong Automation Electrical Stock Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-05-17
Anticipated expiration: 2031-12-31

Abstract

An alternating current-direct current integrated power supply system comprises an alternating current cabinet, a charging cabinet, a feeder cabinet and a battery cabinet which are sequentially arranged, wherein the charging cabinet also comprises an alternating current inlet end, a controller, a charging module, a direct current output end, a discharging module and a charging sampling module which are arranged in a cabinet body; the charging module comprises at least two charging units which are arranged in parallel, the charging units comprise a rectifying module and a current limiting module which are sequentially connected, the input end of the rectifying module is electrically connected with an alternating current inlet wire end, the output end of the current limiting module is electrically connected with a direct current output end, and the control end of the current limiting module is electrically connected with the controller; the charging sampling module is electrically connected with the battery pack, and the output end of the charging sampling module is electrically connected with the controller. The alternating current-direct current integrated power supply system can effectively control the charging voltage and the charging current, so that the charging voltage and the charging current are within a rated range, and the charging stability can be improved.

Description

Alternating current-direct current integrated power supply system

Technical Field

The utility model relates to power supply equipment, in particular to an alternating current and direct current integrated power supply system.

Background

The alternating current-direct current integrated power supply system is widely applied to the industries such as traffic and the like, for example, applied to an urban rail transit power supply system. The communication power supply solution in the integrated power supply system adopts a DC/DC conversion mode, and the DC/DC device is used for converting the output bus voltage (220V/110V) of the power operation power supply in the integrated power supply into 48V voltage, and then the voltage is intensively sent to a bus of the communication power supply, and then the power is supplied to communication loads such as an exchanger and the like through each feeder unit.

The existing alternating current-direct current integrated power supply system generally comprises an alternating current cabinet, a charging cabinet, a feeder cabinet and a battery cabinet which are sequentially arranged, alternating current input by the alternating current cabinet is firstly rectified and limited through a charging module of the charging cabinet, and then is charged to a battery pack in the battery cabinet through a feeder group of the feeder cabinet, the existing charging cabinet generally comprises a cabinet body and a controller arranged in the cabinet body, a charging device, an output unit, the battery pack and a discharging device, however, the charging current of the battery pack cannot be effectively controlled when the charging cabinet is actually used, the situation that the charging current exceeds rated current (is higher or lower) easily occurs, the normal charging of the battery pack can be influenced, and the charging speed is low or even the service life of the battery pack is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing an alternating current and direct current integrated power supply system, which can effectively control charging voltage and charging current to be within a rated range and improve charging stability. The technical scheme is as follows:

the utility model provides an alternating current-direct current integration electrical power generating system, is including the exchange cabinet that sets gradually, the cabinet that charges, feeder cabinet and battery cabinet, exchanges the cabinet, the cabinet that charges, feeder cabinet and battery cabinet all include the cabinet body, its characterized in that: the charging cabinet also comprises an alternating current incoming line end, a controller, a charging module, a direct current output end, a discharging module and a charging sampling module, wherein the alternating current incoming line end, the controller, the charging module, the direct current output end, the discharging module and the charging sampling module are arranged in the cabinet body; the charging module comprises at least two charging units which are arranged in parallel, each charging unit comprises a rectifying module and a current limiting module which are sequentially connected, the input end of the rectifying module is electrically connected with an alternating current inlet end, the output end of the current limiting module is electrically connected with a direct current output end, and the control end of the current limiting module is electrically connected with the controller; the charging sampling module is electrically connected with the battery pack, and the output end of the charging sampling module is electrically connected with the controller.

The rectification module and the current limiting module can adopt a conventional rectification circuit and a conventional current limiting circuit; the charging sampling module can adopt a conventional current sampling circuit.

When the charging device works, alternating current generated by the alternating current cabinet is output to the charging module through an alternating current inlet wire end of the charging cabinet, is rectified and limited by the rectifying module and the current limiting module of each charging unit of the charging module respectively, and is output to the battery pack of the battery cabinet for charging through the direct current output end and the feeder cabinet; and the battery pack can be discharged through the discharging module. In the charging process, the charging sampling module samples the charging current of the battery pack and sends the charging current to the controller, the controller judges the charging current and controls the current limiting module, the charging current is adjusted, the charging is effectively controlled, and the charging stability is improved.

In a preferred scheme, the discharge module is an online inversion discharge device. The on-line inversion discharging device converts the direct current of the storage battery into pure alternating current to feed back to an alternating current power grid. The online inversion discharging device adopts a DC-DC-AC link structure, wherein the front-stage DC-DC realizes the isolation of direct current input and alternating current output. The input direct current passes through the input EMI filter, then passes through the LLC full-bridge resonant converter to be isolated and output 760V left and right direct current (+ -380 VDC), and then passes through the half-bridge inverter circuit to convert the 760V direct current into voltage with the same frequency, the same phase and the same amplitude as the alternating current bypass. When the online inversion discharging device works, the online inversion discharging device is equivalent to an alternating current source, and converts direct current energy into alternating current energy according to set current to feed back the alternating current energy to a power grid.

In a preferred scheme, the charging cabinet is further provided with a plurality of current meters and a plurality of voltage meters. The above current and voltage meters are labeled: the charging unit comprises a first voltmeter, a first ammeter, a second voltmeter and a second ammeter, wherein the first voltmeter displays the voltage input by alternating current in real time, the first ammeter displays the direct current output by the charging unit in real time, the second voltmeter displays the charging voltage in real time, the second ammeter displays the charging current in real time, and therefore manual inspection can be conducted on various states of the charging process.

In a preferred scheme, a lightning protection device and a three-phase input state monitoring module are arranged on the alternating current incoming line end. When lightning stroke occurs, the charging module is protected by the lightning protector to be prevented from being damaged, and when the AC power supply has a phase failure or a voltage loss fault, the three-phase input state monitoring module is started to give an alarm.

In a preferred scheme, an alternating current power supply screen is arranged in a cabinet body of the alternating current cabinet, the alternating current power supply screen is provided with one path of alternating current feed-out loop, two paths of alternating current incoming line power supplies which are arranged in parallel and an automatic switching device capable of realizing automatic switching of the two paths of alternating current incoming line power supplies, interface ends of the two paths of alternating current incoming line power supplies are electrically connected with interface ends of the alternating current feed-out loop through the automatic switching device, and the automatic switching device is electrically connected with corresponding output ends of the controller. When the device works, the two paths of alternating current incoming line power supplies are standby power supplies which are not divided into primary power supplies and secondary power supplies, and automatic switching can be realized between the two paths of alternating current incoming line power supplies through an automatic switching device; when one path of alternating current incoming line power supply loop is in fault and is powered off, the controller automatically switches to the other alternating current incoming line power supply through the automatic switching device, so that one path of alternating current incoming line power supply and the alternating current feed-out loop are ensured to be in a power-on state all the time, the bus is driven to normally operate, the alternating current cabinet can continuously supply power, and the charging stability can be improved.

In a more preferable scheme, the automatic switching device adopts a PC-level dual-power Automatic Transfer Switch (ATS). Specifically, the PC-level dual-power Automatic Transfer Switch (ATS) can adopt a Schneider WATSG type which is an international famous brand.

In a more preferable scheme, an incoming line breaker is arranged on the alternating current incoming line power supply. The overcurrent protection of the incoming line circuit breaker has the function of locking the automatic switching device. Specifically, the incoming line breaker can be an international famous brand ABB Tmax XT type plastic shell breaker.

In a more preferable scheme, a feeder circuit breaker is arranged on the alternating current feed-out loop. Generally, the power distribution of the alternating current feed-out loop adopts a busbar mode, and a feeder line outputs AC 400/230V. The incoming line circuit breaker and the feeder circuit breaker can ensure that the tripping time is coordinated when a line has a fault. The feed-out circuit breaker can be a high-breaking automatic air circuit breaker with an alarm auxiliary contact.

In a preferred embodiment, the ac cabinet further includes a second monitoring module capable of monitoring all incoming lines, feeder lines, and all fault information, and the second monitoring module is electrically connected to the corresponding interface end of the ac power supply panel. Generally, related signals of the AC power supply screen are accessed into the monitoring module through I/O, AI and the like. The second monitoring module can monitor all incoming lines, feeder lines and all fault information and then transmit the incoming lines, the feeder lines and all fault information to the integrated automation system so that workers can timely acquire and process the fault information.

Generally, a second lightning protection device with a nominal discharge current of 10kA (8/20 μ s) in a phase line and ground line (L-PE) and neutral line and ground line (N-PE) protection mode is installed at an inlet of an AC charging power supply of an AC power supply screen. The second lightning protection means may be a surge protector. When lightning stroke happens, the charging power supply is protected from being damaged through the second lightning protection device.

In an optimized scheme, the feeder cabinet further comprises a feeder group and an automatic pressure regulating device, the feeder group and the automatic pressure regulating device are arranged in the cabinet body, the automatic pressure regulating device is connected between the direct current output end and the feeder group, and the automatic pressure regulating device is electrically connected with the corresponding output end of the controller. During operation, the controller can adjust the charging voltage through the automatic voltage regulating device, so that the charging voltage is in a rated range, and the charging stability can be improved. Generally, the automatic voltage regulating device adopts a double-silicon-chain structure, the double silicon chains work simultaneously, and a single silicon chain can meet the requirement of independent work; each silicon chain adopts 7-grade silicon chains, the rated total voltage drop is 35V, each group of voltage drops is 5V, DC220V is used as a reference value (or can be set as other values), and the adjustment is carried out when the voltage exceeds +/-5V, if the bus voltage is controlled to rise to be larger than 225V for some reason, the automatic voltage regulating device automatically puts in the 1-grade silicon chain, otherwise, when the bus voltage drops to be smaller than 215V, the 1-grade silicon chain is automatically cut off, and the maximum voltage regulating precision is +/-5V/220V and is not larger than +/-2.5%.

In a more preferable scheme, the feeder cabinet further comprises a feeder voltage meter and a feeder current meter. And the feeder voltmeter displays the voltage of the feeder group in real time, and the feeder ammeter displays the direct current of the feeder group in real time.

In the preferred scheme, the internal group battery and the battery inspection device that is equipped with of cabinet of battery cabinet, the group battery is including stacking in proper order the internal a plurality of batteries of cabinet, and the battery inspection device is connected with the group battery electricity. When the charging unit works and supplies power normally, the charging unit charges or floats each storage battery of the battery pack, and simultaneously provides power for all frequent direct current loads, and the storage batteries supply power to impact loads; after the AC power is lost, the storage battery supplies power to all the DC loads in the storage battery, including frequent loads, impact loads and the like. When the charging device is in a uniform charging state, the battery pack is charged at a constant current, and when the set uniform charging voltage is reached, the charging device automatically charges in a constant voltage mode; when the battery is fully charged, the charging device can automatically turn to a floating charging state. The battery inspection device can circularly detect the total voltage of the battery pack, the charging and discharging current of the storage battery, the terminal voltage of the single storage battery and the like, send out an alarm signal when exceeding a normal range, correctly indicate a failed storage battery unit, send related signals to a full-automatic comprehensive system, and realize fault finding and positioning under a non-power-off state.

Usually, the alternating current-direct current integration electrical power generating system still includes the touch-sensitive screen, the touch-sensitive screen with controller communication connection, the touch-sensitive screen can show each item working parameter of alternating current-direct current integration electrical power generating system in the course of the work in real time, makes things convenient for the staff to watch at any time to staff's accessible touch button on the touch-sensitive screen inputs the default of each item working parameter to the controller, convenient operation.

In the preferred scheme, humidity sensors and heaters are arranged in the cabinet bodies of the alternating current cabinet, the charging cabinet, the feeder cabinet and the battery cabinet, the humidity sensors and the heaters are arranged at the lower parts of the corresponding cabinet bodies, the humidity sensors are respectively and electrically connected with the corresponding input ends of the controller, and the heaters are respectively and electrically connected with the corresponding output ends of the controller. Each humidity transducer is used for surveying the humidity size of corresponding cabinet body surrounding environment respectively and sends for the controller and handles, and when detecting that the humidity value of cabinet body surrounding environment is greater than and predetermines the target value, the controller makes corresponding heater automatic generate heat and dehumidify, and the internal electronic component of protection cabinet does not receive the erosion of humid air and the damage appears, has good humidity resistance, can place in the place that humidity is great (like in the computer lab of subway station).

In the more preferred scheme, the heater includes fan and a plurality of electric heating board, and each electric heating board has the clearance side by side vertical setting and between each electric heating board, and the fan setting is in each electric heating board below, and the air outlet of fan sets up upwards. When dehumidification is needed, the controller starts the fan and each electric heating plate, the fan supplies air to the gaps among the electric heating plates, and the heated hot air is used for dehumidification.

Compared with the prior art, the utility model has the following advantages:

the AC-DC integrated power supply system stably charges the battery pack through the AC cabinet, the charging cabinet, the feeder cabinet and the battery cabinet which are sequentially arranged; in the charging process, the charging current of the battery pack is sampled by the charging sampling module and is sent to the controller, the controller judges the charging current and controls the current limiting module, the charging current is adjusted, the charging is effectively controlled, the charging stability can be improved, and the charging sampling module is suitable for urban rail transit.

Drawings

Fig. 1 is a schematic structural diagram of an ac/dc integrated power supply system according to a preferred embodiment of the present invention.

Fig. 2 is a schematic circuit diagram of the ac/dc integrated power supply system shown in fig. 1.

Fig. 3 is a logic block diagram of the ac/dc integrated power supply system shown in fig. 1.

Fig. 4 is a schematic structural diagram of a heater in the ac/dc integrated power supply system shown in fig. 1.

Detailed Description

As shown in fig. 1-4, the ac-dc integrated power supply system includes an ac cabinet 1, a charging cabinet 2, a feeder cabinet 3, and a battery cabinet 4, which are sequentially arranged, where the ac cabinet 1, the charging cabinet 2, the feeder cabinet 3, and the battery cabinet 4 all include a cabinet body 10, the charging cabinet 2 further includes an ac incoming line end 21, a controller 22, a charging module 23, a dc output end 24, a discharging module 25, and a charging sampling module 26, which are arranged in the cabinet body 10, the charging module 23 is electrically connected between the ac incoming line end 21 and the dc output end 24, a control end of the charging module 23 is electrically connected with the controller 22, an input end of the discharging module 25 is electrically connected with the ac incoming line end 21, an output end of the discharging module 25 is used for connecting a battery pack 41 of the battery cabinet 4, and a control end of the discharging module 25 is electrically connected with the controller 22; the charging module 23 includes at least two charging units 231 arranged in parallel, each charging unit 231 includes a rectifying module 2311 and a current limiting module 2312 connected in sequence, an input end of the rectifying module 2311 is electrically connected with the ac incoming line end 21, an output end of the current limiting module 2312 is electrically connected with the dc output end 24, and a control end of the current limiting module 2312 is electrically connected with the controller 22; the charging sampling module 26 is electrically connected with the battery pack 41, and the output end of the charging sampling module 26 is electrically connected with the controller 22.

In the present embodiment, the discharge module 25 is an online inverter discharge device. The on-line inversion discharging device converts the direct current of the storage battery into pure alternating current to feed back to an alternating current power grid. The online inversion discharging device adopts a DC-DC-AC link structure, wherein the front-stage DC-DC realizes the isolation of direct current input and alternating current output. The input direct current passes through the input EMI filter, then passes through the LLC full-bridge resonant converter to be isolated and output 760V left and right direct current (+ -380 VDC), and then passes through the half-bridge inverter circuit to convert the 760V direct current into voltage with the same frequency, the same phase and the same amplitude as the alternating current bypass. When the online inversion discharging device works, the online inversion discharging device is equivalent to an alternating current source, and converts direct current energy into alternating current energy according to set current to feed back the alternating current energy to a power grid.

In this embodiment, the charging cabinet 22 is further provided with a first voltmeter 27, a first ammeter 28, a second voltmeter 29 and a second ammeter 210. The first voltmeter 27 displays the voltage of the alternating current input in real time, the first ammeter 28 displays the direct current output by the charging unit 231 in real time, the second voltmeter 29 displays the charging voltage in real time, and the second ammeter 210 displays the charging current in real time, so that manual inspection can be performed on various states of the charging process.

In this embodiment, a three-phase input state monitoring module 212 is disposed on the ac inlet terminal 21. When the ac power supply has a phase loss or a voltage loss fault, the three-phase input state monitoring module 212 is activated to alarm.

An alternating current power supply panel 11 is arranged in a cabinet body 10 of the alternating current cabinet 1, the alternating current power supply panel 11 is provided with a single alternating current feed-out loop 112, two alternating current incoming line power supplies 113 arranged in parallel, and an automatic switching device 114 capable of realizing automatic switching of the two alternating current incoming line power supplies 113, interface ends of the two alternating current incoming line power supplies 113 are electrically connected with an interface end of the alternating current feed-out loop 112 through the automatic switching device 114, and the automatic switching device 114 is electrically connected with a corresponding output end of the controller 22.

In the present embodiment, the automatic switching device 114 employs a PC-level dual power Automatic Transfer Switch (ATS). Specifically, the PC-level dual-power Automatic Transfer Switch (ATS) can adopt a Schneider WATSG type which is an international famous brand.

In this embodiment, the ac line power source 113 is provided with a line breaker 1131. The overcurrent protection of the inlet circuit breaker 1131 has the function of blocking the automatic switching device 114. Specifically, the incoming line breaker 1131 may be an ABB Tmax XT type plastic shell breaker, a well-known international brand.

In the present embodiment, a feeder breaker (not shown) is disposed on the ac feed-out circuit 112. The power distribution of the AC feed-out loop 112 adopts a busbar mode, and the feeder line outputs AC 400/230V. The incoming circuit breaker 1131 and the feeder circuit breaker can ensure coordinated trip times in the event of a line fault. The feed-out circuit breaker can be a high-breaking automatic air circuit breaker with an alarm auxiliary contact.

In this embodiment, a lightning protection device 115 having a nominal discharge current of 10kA (8/20 μ s) in a phase line and ground line (L-PE) and neutral line and ground line (N-PE) protection mode is installed at an ac charging power inlet of an ac power panel. The lightning protector 115 may employ a surge protector. When a lightning strike occurs, the charging power supply is protected from being damaged by the lightning protector 115.

In this embodiment, the ac cabinet 1 further includes a second monitoring module (not shown in the figure) capable of monitoring all incoming lines, feeder lines, and all fault information, and the second monitoring module is electrically connected to the corresponding interface end of the ac power supply panel. Generally, related signals of the AC power supply screen are accessed into the monitoring module through I/O, AI and the like. The second monitoring module can monitor all incoming lines, feeder lines and all fault information and then transmit the incoming lines, the feeder lines and all fault information to the integrated automation system so that workers can timely acquire and process the fault information.

In this embodiment, the feeder cabinet 3 further includes a feeder group 31 and an automatic voltage regulating device 32 disposed in the cabinet body 10, the automatic voltage regulating device 32 is connected between the dc output terminal 24 and the feeder group 31, and the automatic voltage regulating device 32 is electrically connected to a corresponding output terminal of the controller 22. During operation, the controller 22 can adjust the charging voltage through the automatic voltage adjusting device 32 to make the charging voltage within a rated range, thereby improving the charging stability. Generally, the automatic voltage regulation device 32 adopts a double-silicon-chain structure, the double silicon chains work simultaneously, and the single silicon chain can meet the requirement of independent work; each silicon chain adopts 7-grade silicon chains, the rated total voltage drop is 35V, each group of voltage drops is 5V, DC220V is used as a reference value (or can be set as other values), and the regulation is carried out when the voltage exceeds +/-5V, if the bus voltage is controlled to rise to be larger than 225V for some reason, the automatic voltage regulating device 32 automatically puts in the 1-grade silicon chain, otherwise, when the bus voltage is controlled to fall to be smaller than 215V, the 1-grade silicon chain is automatically cut off, and the maximum voltage regulating precision is +/-5V/220V and is not larger than +/-2.5%.

In this embodiment, the feeder cabinet 3 further includes a feeder voltmeter 33 and a feeder ammeter 34, and both the feeder voltmeter 33 and the feeder ammeter 34 are electrically connected to the feeder group 31. The feeder voltmeter 33 displays the voltage of the feeder group 31 in real time, and the feeder ammeter 34 displays the direct current of the feeder group 31 in real time.

In this embodiment, a battery pack 41 and a battery inspection device 42 are provided in the cabinet body 10 of the battery cabinet 4, the battery pack 41 includes a plurality of storage batteries stacked in sequence, and the battery inspection device 42 is electrically connected to the battery pack 41. In operation, during normal power supply, the charging unit 231 charges or floats each storage battery of the battery pack 41, and simultaneously provides power for all the frequent dc loads, and the storage batteries supply power to the impact loads; after the AC power is lost, the storage battery supplies power to all the DC loads in the storage battery, including frequent loads, impact loads and the like. When the charging device is in a uniform charging state, the battery pack 41 is charged at a constant current, and when the set uniform charging voltage is reached, the charging device automatically charges in a constant voltage mode; when the battery is fully charged, the charging device can automatically turn to a floating charging state. The battery inspection device 42 can cyclically detect the total voltage of the battery pack 41, the charging and discharging current of the storage battery, the terminal voltage of the single storage battery and the like, send out an alarm signal when the total voltage exceeds a normal range, correctly indicate a failed storage battery unit, send related signals to a comprehensive automation system, and realize fault finding and positioning under a non-power-off state.

Humidity sensors 20 and heaters 30 are arranged in the cabinet bodies 10 of the alternating current cabinet 1, the charging cabinet 2, the feeder cabinet 3 and the battery cabinet 4, the humidity sensors 20 and the heaters 30 are installed at the lower parts of the corresponding cabinet bodies 10, the humidity sensors 20 are respectively and electrically connected with corresponding input ends of the controller 22, and the heaters 30 are respectively and electrically connected with corresponding output ends of the controller 22. In this embodiment, the heater 30 includes a fan 301 and a plurality of electric heating plates 302, each electric heating plate 302 is disposed vertically side by side with a gap between each electric heating plate 302, the fan 301 is disposed below each electric heating plate 302, and an air outlet of the fan 301 is disposed upward.

The working principle of the ac/dc integrated power supply system is briefly described as follows:

during operation, ac power generated by one of the ac incoming line power sources 113 of the ac cabinet 1 is output to the charging module 23 through the ac incoming line end 21 of the charging cabinet 2, and is rectified and limited by the rectifying module 2311 and the current limiting module 2312 of each charging unit 231 of the charging module 23, and is output to the battery pack 41 of the battery cabinet 4 through the dc output end 24 and the feeder cabinet 3 to be charged; and the battery pack 41 may be discharged through the discharge module 25. The two ac incoming line power sources 113 of the ac cabinet 1 are mutually backup power sources, which are not primary and secondary, and can be automatically switched through the automatic switching device 114; when one alternating current incoming line power supply 113 has a fault and is powered off, the controller 22 automatically switches to the other alternating current incoming line power supply 113 through the automatic switching device 114, so that one alternating current incoming line power supply 113 and the alternating current feed-out circuit 112 can be ensured to be always in a power-on state, the bus is driven to normally operate, the alternating current cabinet 1 can continuously supply power, and the charging stability can be improved. In the charging process, the charging sampling module 26 samples the charging current of the battery pack 41 and sends the charging current to the controller 22, the controller 22 determines the charging current and controls the current limiting module 2312, the charging current is adjusted, the charging is effectively controlled, and the charging stability is improved. Each humidity sensor 20 is used for surveying the humidity size of the corresponding cabinet body 10 surrounding environment respectively and sends to the controller 22 and handles, when detecting that the humidity value of the cabinet body 10 surrounding environment is greater than the preset target value, the controller 22 starts the fan 301 and each electric heating plate 302, the fan 301 supplies air towards the clearance between each electric heating plate 302, the hot air that forms after the heating is utilized to dehumidify, the electronic component in the protection cabinet body 10 is not corroded by the humid air and is damaged, and the humidity-proof cabinet has good humidity resistance, and can be placed in the place (such as in the machine room of the subway station) with higher humidity.

In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and the equivalent or simple change of the structure, the characteristics and the principle described in the present patent idea is included in the protection scope of the present patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides an alternating current-direct current integration electrical power generating system, is including the exchange cabinet that sets gradually, the cabinet that charges, feeder cabinet and battery cabinet, exchanges the cabinet, the cabinet that charges, feeder cabinet and battery cabinet all include the cabinet body, its characterized in that: the charging cabinet also comprises an alternating current incoming line end, a controller, a charging module, a direct current output end, a discharging module and a charging sampling module, wherein the alternating current incoming line end, the controller, the charging module, the direct current output end, the discharging module and the charging sampling module are arranged in the cabinet body; the charging module comprises at least two charging units which are arranged in parallel, each charging unit comprises a rectifying module and a current limiting module which are sequentially connected, the input end of the rectifying module is electrically connected with an alternating current inlet end, the output end of the current limiting module is electrically connected with a direct current output end, and the control end of the current limiting module is electrically connected with the controller; the charging sampling module is electrically connected with the battery pack, and the output end of the charging sampling module is electrically connected with the controller.

2. The AC-DC integrated power supply system according to claim 1, wherein: the discharge module is an online inversion discharge device; the charging cabinet is also provided with a plurality of current meters and a plurality of voltage meters; and the alternating current incoming line end is provided with a lightning protector and a three-phase input state monitoring module.

3. The AC-DC integrated power supply system according to claim 1, wherein: the alternating current cabinet is characterized in that an alternating current power supply screen is arranged in a cabinet body of the alternating current cabinet, the alternating current power supply screen is provided with an alternating current feed-out loop, two alternating current incoming line power supplies which are arranged in parallel and an automatic switching device capable of realizing automatic switching of the two alternating current incoming line power supplies, interface ends of the two alternating current incoming line power supplies are electrically connected with interface ends of the alternating current feed-out loop through the automatic switching device, and the automatic switching device is electrically connected with corresponding output ends of the controller.

4. The AC/DC integrated power supply system according to claim 3, wherein: the automatic switching device adopts a PC-level dual-power automatic transfer switch.

5. The AC/DC integrated power supply system according to claim 3, wherein: an incoming line breaker is arranged on the alternating current incoming line power supply; and a feeder circuit breaker is arranged on the alternating current feed-out loop.

6. The AC/DC integrated power supply system according to any one of claims 1-5, wherein: the alternating current cabinet also comprises a second monitoring module which can monitor all incoming lines, feeder lines and fault information, and the second monitoring module is electrically connected with the corresponding interface end of the alternating current power supply screen; the internal group battery and the battery inspection device that is equipped with of cabinet of battery cabinet, the group battery is including stacking in proper order a plurality of batteries in the cabinet body, battery inspection device is connected with the group battery electricity.

7. The AC/DC integrated power supply system according to any one of claims 1-5, wherein: the feeder cabinet also comprises a feeder group and an automatic pressure regulating device which are arranged in the cabinet body, the automatic pressure regulating device is connected between the direct current output end and the feeder group, and the automatic pressure regulating device is electrically connected with the corresponding output end of the controller.

8. The ac-dc integrated power supply system according to claim 7, wherein: the feeder cabinet also comprises a feeder voltage meter and a feeder ammeter.

9. The AC/DC integrated power supply system according to any one of claims 1-5, wherein: the intelligent charging cabinet is characterized in that humidity sensors and heaters are arranged in the cabinet bodies of the alternating current cabinet, the charging cabinet, the feeder cabinet and the battery cabinet, the humidity sensors and the heaters are mounted at the lower parts of the corresponding cabinet bodies, the humidity sensors are respectively and electrically connected with the corresponding input ends of the controller, and the heaters are respectively and electrically connected with the corresponding output ends of the controller.

10. The ac-dc integrated power supply system according to claim 9, wherein: the heater includes fan and a plurality of electric heating board, and each electric heating board has the clearance side by side vertical setting and between each electric heating board, and the fan setting is in each electric heating board below, and the air outlet of fan sets up upwards.