CN114094692B - Power supply system and method for substation equipment - Google Patents
Power supply system and method for substation equipment Download PDFInfo
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- CN114094692B CN114094692B CN202111363550.6A CN202111363550A CN114094692B CN 114094692 B CN114094692 B CN 114094692B CN 202111363550 A CN202111363550 A CN 202111363550A CN 114094692 B CN114094692 B CN 114094692B
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- conversion device
- alternating current
- power supply
- voltage
- direct current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention provides a power supply system and a method of substation equipment, wherein the system comprises the following steps: the system comprises an alternating current power supply, a standby battery, electric equipment, a first alternating current-direct current conversion device, a second alternating current-direct current conversion device, a first switch group and a second switch group; the alternating current power supply is connected with the first alternating current-direct current conversion device through the first switch group and connected with the second alternating current-direct current conversion device through the second switch group; the electric equipment is respectively connected with the standby battery, the first alternating current-direct current conversion device and the second alternating current-direct current conversion device. The first switch group is used for responding to the disconnection operation of a user, placing the first switch group in a disconnection state and triggering the standby battery to supply power; the second switch group is used for responding to the detection operation of a user and is placed in a closed state so as to enable the alternating current power supply to supply power when the output voltage of the second switch group is lower than a preset first voltage in the process of supplying power to the standby battery. By applying the system provided by the invention, the equipment can be used as the test load of the standby battery under the condition of ensuring power supply, and the test accuracy of the standby battery is improved.
Description
Technical Field
The invention relates to the technical field of power supply, in particular to a power supply system and method of substation equipment.
Background
A substation is one of important components in an electric power system, and various kinds of devices are provided in the substation to maintain operation of the substation. The power supply of equipment in the transformer substation is guaranteed, so that the transformer substation is one of important works for guaranteeing normal operation of the transformer substation.
Currently, equipment in a transformer substation is usually powered by an alternating current power supply, and when the alternating current power supply is abnormal, a standby battery is used for power supply. In order to ensure that the backup battery can normally supply power when the alternating current power supply is abnormal, the backup battery is often required to be charged and discharged manually through an additional load so as to detect the performance of the backup battery.
The inventor finds that the additional load used for testing is generally of a uniform specification, the additional load is used for detecting the standby battery, the load consumption of the standby battery during actual power supply cannot be reduced, the testing accuracy is low, and the standby battery cannot be charged and discharged through the transformer substation equipment under the normal power supply state based on the power supply mode of the existing transformer substation equipment, so that the performance of the standby battery cannot be accurately detected.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a power supply system and a method for substation equipment, which are used for solving the problems that the existing power supply mode cannot use the substation equipment as a detection load of a standby battery and the performance of the standby battery is difficult to accurately detect.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
a power supply system for substation equipment, comprising:
the system comprises an alternating current power supply, a standby battery, electric equipment, a first alternating current-direct current conversion device, a second alternating current-direct current conversion device, a first switch group and a second switch group;
the alternating current power supply is connected with each input end of the first alternating current-direct current conversion device through the first switch group, and is connected with each input end of the second alternating current-direct current conversion device through the second switch group;
the electric equipment is respectively connected with the standby battery, each output end of the first alternating current-direct current conversion device and each output end of the second alternating current-direct current conversion device;
the first switch group is used for responding to the disconnection operation of a user on the alternating current power supply in the process that the alternating current power supply supplies power to the electric equipment through the first alternating current-direct current conversion device, and is in a disconnection state so as to trigger the standby battery to supply power to the electric equipment;
the second ac/dc conversion device is configured to respond to a first voltage adjustment operation performed on the second ac/dc conversion device by the user, and adjust an output voltage of the second ac/dc conversion device to a preset first voltage, where the preset first voltage is a minimum working voltage of the electric device;
And the second switch group is used for responding to the detection operation of the user on the standby battery, and placing the second switch group in a closed state so that the alternating current power supply supplies power to the electric equipment through the second alternating current-direct current conversion device when the output voltage of the standby battery is lower than the preset first voltage in the process that the standby battery supplies power to the electric equipment.
The above system, optionally, the second ac/dc conversion device is further configured to:
responding to a second voltage regulation operation of the user on the second AC/DC conversion device, regulating the output voltage of the second AC/DC conversion device to a preset second voltage, wherein the preset second voltage is higher than the output voltage of the first AC/DC conversion device;
the second switch group is further configured to respond to a detection operation performed by the user on the second ac/dc conversion device in a process that the ac power supply supplies power to the electric device through the first ac/dc conversion device, and place the second switch group in a closed state, so as to detect whether the ac power supply can supply power to the electric device through the second ac/dc conversion device.
In the above system, optionally, the ac power source is a three-phase ac power source.
The system described above, optionally, the first ac/dc conversion device includes a first ac/dc converter, a second ac/dc converter, and a third ac/dc converter;
the first switch group comprises a first switch, a second switch and a third switch;
a first input end of the first alternating current/direct current converter is connected with a first phase line of the alternating current power supply through the first switch, and a second input end of the first alternating current/direct current converter is connected with a zero line of the alternating current power supply through the first switch;
the first input end of the second alternating current/direct current converter is connected with a second phase line of the alternating current power supply through the second switch, and the second input end of the second alternating current/direct current converter is connected with a zero line of the alternating current power supply through the second switch;
the first input end of the third alternating current/direct current converter is connected with a third phase line of the alternating current power supply through the third switch, and the second input end of the third alternating current/direct current converter is connected with a zero line of the alternating current power supply through the third switch.
The system, optionally, the second ac/dc conversion device includes a fourth ac/dc converter, and the second switch group includes a fourth switch;
the first input end of the fourth alternating current/direct current converter is connected with the first phase line of the alternating current power supply through the fourth switch, and the second input end of the fourth alternating current/direct current converter is connected with the zero line of the alternating current power supply through the fourth switch.
The above system, optionally, further comprising: a power distribution unit;
the standby battery, the output ends of the first AC/DC conversion device and the output ends of the second AC/DC conversion device are respectively connected with the electric equipment through the power distribution unit;
the power distribution unit is used for monitoring the output voltage of the first alternating-current/direct-current conversion device, the output voltage of the second alternating-current/direct-current conversion device and the output voltage of the standby battery.
The above system, optionally, further comprising: a display device;
the power distribution unit is connected with the display device;
the display device is used for displaying the output voltage of the first AC/DC conversion device, the output voltage of the second AC/DC conversion device and the output voltage of the standby battery, which are monitored by the power distribution unit.
The power supply method of the substation equipment is applied to a power supply system of the substation equipment, and the system comprises an alternating current power supply, a standby battery, electric equipment, a first alternating current-direct current conversion device, a second alternating current-direct current conversion device, a first switch group and a second switch group;
the method comprises the following steps:
responding to a first voltage regulation operation of a user on the second AC/DC conversion device, regulating the output voltage of the second AC/DC conversion device to a preset first voltage, wherein the preset first voltage is the minimum working voltage of the electric equipment;
in the process that the alternating current power supply supplies power to the electric equipment through the first alternating current-direct current conversion device, responding to the disconnection operation of a user on the alternating current power supply, and placing the first switch group in a disconnection state so as to trigger the standby battery to supply power to the electric equipment;
and responding to the detection operation of the user on the standby battery, and placing the second switch group in a closed state so that the alternating current power supply supplies power to the electric equipment through the second alternating current-direct current conversion device when the output voltage of the standby battery is lower than the preset first voltage in the process that the standby battery supplies power to the electric equipment.
The method, optionally, further comprises:
responding to a second voltage regulation operation of the user on the second AC/DC conversion device, regulating the output voltage of the second AC/DC conversion device to a preset second voltage, wherein the preset second voltage is higher than the output voltage of the first AC/DC conversion device;
and in the process that the alternating current power supply supplies power to the electric equipment through the first alternating current-direct current conversion device, responding to detection operation of the user on the second alternating current-direct current conversion device, and placing the second switch group in a closed state so as to detect whether the alternating current power supply can supply power to the electric equipment through the second alternating current-direct current conversion device.
The method, optionally, the system further includes a power distribution unit, and the method further includes:
and monitoring the output voltage of the first AC/DC conversion device, the output voltage of the second AC/DC conversion device and the output voltage of the standby battery through the power distribution unit.
Based on the above-mentioned power supply system of substation equipment provided by the embodiment of the present invention, the power supply system includes: the system comprises an alternating current power supply, a standby battery, electric equipment, a first alternating current-direct current conversion device, a second alternating current-direct current conversion device, a first switch group and a second switch group; the alternating current power supply is connected with each input end of the first alternating current-direct current conversion device through the first switch group, and is connected with each input end of the second alternating current-direct current conversion device through the second switch group; the electric equipment is respectively connected with the standby battery, each output end of the first AC/DC conversion device and each output end of the second AC/DC conversion device; the first switch group is used for responding to the disconnection operation of a user on the alternating current power supply in the process that the alternating current power supply supplies power to the electric equipment through the first alternating current-direct current conversion device, and is in a disconnection state so as to trigger the standby battery to supply power to the electric equipment; the second AC/DC conversion device is used for responding to the first voltage regulation operation of the second AC/DC conversion device by a user, regulating the output voltage of the second AC/DC conversion device to a preset first voltage which is the minimum working voltage of the electric equipment; and the second switch group is used for responding to the detection operation of the user on the standby battery, and is in a closed state so that the alternating current power supply supplies power to the electric equipment through the second alternating current-direct current conversion device when the output voltage of the standby battery is lower than the preset first voltage in the process that the standby battery supplies power to the electric equipment. When the power supply system provided by the embodiment of the invention is applied, when the standby battery is required to be detected, the current alternating current power supply for the electric equipment can be disconnected through the first switch group, so that the standby battery supplies power for the electric equipment, the electric equipment is used as a test load of the standby battery, and when the output voltage of the standby battery can not meet the power supply requirement of the electric equipment, the alternating current power supply can be triggered to supply power for the electric equipment through the second alternating current-direct current conversion device. Under the condition of guaranteeing power supply of electric equipment, the electric equipment can be used as a test load of the standby battery, and the test accuracy of the standby battery is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a power supply system of a substation device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power supply system of a substation device according to an embodiment of the present invention;
fig. 3 is another schematic structural diagram of a power supply system of a substation device according to an embodiment of the present invention;
fig. 4 is a method flowchart of a power supply method of substation equipment according to an embodiment of the present invention;
fig. 5 is a flowchart of another method of a power supply method of a substation device according to an embodiment of the present invention;
fig. 6 is a schematic diagram of an internal structure of a chassis according to an embodiment of the present invention;
fig. 7 is a schematic front structural diagram of a chassis according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a cabinet according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the present disclosure, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The prior art shows that the existing power supply system of the transformer substation is characterized in that an alternating current power supply and a standby battery are respectively connected with electric equipment of the transformer substation, the alternating current power supply supplies power to the electric equipment in a normal state, when the alternating current power supply cannot normally supply power, the voltages at two ends of the electric equipment can be reduced along with the alternating current power supply, and the standby battery can be triggered to start discharging at the moment to supply power to the electric equipment. In the existing power supply system, under the condition that power supply of electric equipment is guaranteed, the electric equipment is used as a test load of the standby battery, and accurate detection of the performance of the standby battery is not facilitated.
Therefore, the embodiment of the invention provides a power supply system of substation equipment, which can disconnect the existing power supply line of an alternating current power supply through a switch to enable a standby battery to supply power to electric equipment, and can trigger the alternating current power supply to supply power to the electric equipment again when the standby battery does not meet the power supply condition of the electric equipment. Under the condition of ensuring the power supply of the electric equipment, the electric equipment is used as a test load of the standby battery, and the test accuracy of the standby battery is improved.
The embodiment of the invention provides a power supply system of substation equipment, and a system structure schematic diagram of the system can be shown in fig. 1, and the system comprises:
the power supply system comprises an alternating current power supply 101, a standby battery 102, a first alternating current-direct current conversion device 103, a second alternating current-direct current conversion device 104, a first switch group 105, a second switch group 106 and electric equipment 107;
the ac power supply 101 is connected to each input terminal of the first ac-dc conversion device 103 through the first switch group 105, and the ac power supply 101 is connected to each input terminal of the second ac-dc conversion device 104 through the second switch group 106;
the electric equipment 107 is respectively connected with the standby battery 102, each output end of the first ac/dc conversion device 103 and each output end of the second ac/dc conversion device 104;
The first switch set 105 is configured to respond to a disconnection operation performed by a user on the ac power supply 101 in a process that the ac power supply 101 supplies power to the electric equipment 107 through the first ac-dc conversion device 103, and place the first switch set 105 in a disconnected state to trigger the backup battery 102 to supply power to the electric equipment 107;
the second ac/dc conversion device 104 is configured to respond to a first voltage adjustment operation performed by the user on the second ac/dc conversion device 104, and adjust an output voltage of the second ac/dc conversion device 104 to a preset first voltage, where the preset first voltage is a minimum working voltage of the electric device 107;
the second switch set 106 is configured to respond to a detection operation performed by the user on the backup battery 107, and place the second switch set 106 in a closed state, so that when the output voltage of the backup battery 102 is lower than the preset first voltage during the process that the backup battery 102 supplies power to the electric device 107, the ac power supply 101 supplies power to the electric device 107 through the second ac-dc conversion device 104.
It should be noted that, the schematic structural diagram shown in fig. 1 is only provided for better illustrating a schematic diagram of an embodiment of the present invention, and is only illustrative, and specific device structures, specific ports and specific electrical connection structures are not shown in the drawings, and the connection relationship in the practical application process is not limited.
In the system provided by the embodiment of the invention, the electric equipment 107 refers to working equipment in a transformer substation, and in a specific application process, a plurality of electric equipment are arranged in the transformer substation.
The first switch group 105 and the second switch group 105 provided in the embodiment of the present invention respectively include at least one switch, and the specific number of the switches may be determined according to an actual circuit structure, so that the connection or disconnection of the lines between the ac power source and the first ac-dc conversion device and between the ac power source and the second ac-dc conversion device may be achieved, which means that each switch in the switch group is in a connection state or in an disconnection state correspondingly.
The first ac/dc conversion device 103 and the second ac/dc conversion device 104 respectively include at least one ac/dc converter, and the specific number of devices may be determined according to an actual circuit structure, so that dc conversion of an ac power supply may be achieved.
In the daily operation process of the electric equipment 107, the first switch group 105 is in a closed state, a circuit between the alternating current 101 and the first alternating current-direct current conversion device 103 and the electric equipment 107 is a passage, and the alternating current power supply 101 supplies power to the electric equipment 107. Specifically, the ac voltage output by the ac power supply 101 is input to the first ac-dc conversion device 103, and after ac-dc conversion by the first ac-dc conversion device 103, a dc voltage corresponding to the ac voltage output by the ac power supply 101 can be output, and the dc voltage output by the first ac-dc conversion device 103 supplies power to the electric device 107. The output voltage value of the first ac/dc conversion device 103 is the rated voltage value of the electric device 107.
During the daily operation of the electric device 107, the second switch group 106 is in an off state, that is, the circuit between the ac power source 101 and the second ac-dc conversion device 104, and the electric device 107 is open, and the second ac-dc conversion device 104 does not have an input ac voltage and does not provide a dc voltage. The second ac/dc converter 104 is an adjustable ac/dc converter, wherein the ac/dc converter is an adjustable ac/dc converter, and the voltage value of the output voltage can be adjusted.
When the user needs to detect the performance of the backup battery 102, the output voltage of the second ac/dc conversion device 104 may be adjusted first, and the output voltage is adjusted to the minimum operating voltage of the electric device. It should be noted that, in an actual application process, the output voltage value of the second ac/dc conversion device 104 may be kept to the minimum operating voltage, instead of being adjusted every time. After the adjustment is completed, the user may close the second switch set 106, so that the circuit between the ac power source 101 and the second ac-dc conversion device 104, and the electric device 107 becomes a path. According to the power supply characteristic of the direct current voltage, the power supply device with the highest voltage value in the voltage source supplies power. When the output voltage of the first ac/dc conversion device 103 or the backup battery 102 is higher than the minimum operating voltage of the electric device 107, the output voltage of the second ac/dc conversion device 104 is lower than the output voltages of the other electric energy output devices, so that power is not supplied thereto.
When the output voltage value of the second ac/dc conversion device 104 is the minimum operating voltage of the electric device and the second switch group 106 is closed, the user can open the first switch group 105 and open the circuit of the ac power source 101 powered by the first ac/dc conversion device 103, and the operation can gradually reduce the output voltage of the first ac/dc conversion device 103, so that the power supply requirement of the electric device 107 cannot be met. The circuit between the backup battery 102 and the electric device is a path, and when the output voltage of the backup battery 102 is higher than the output voltage of the first ac/dc conversion device 103, the backup battery 102 supplies power to the electric device 107. At this time, the electric device 107 becomes a discharge load of the backup battery 102, and the performance of the backup battery 102 can be detected by measuring a discharge characteristic curve of the electric device during the power supply of the backup battery 102.
In the process of supplying power to the electric equipment 107 by the backup battery 102, if the performance of the backup battery 102 is abnormal or the electric quantity is consumed, when the output voltage of the backup battery 102 is lower than the minimum working voltage of the electric equipment, the output voltage of the second ac/dc conversion device 104 is the maximum output voltage in the system, at this time, the ac power supply 101 supplies power to the electric equipment 107 by converting the output voltage of the second ac/dc conversion device 104, so as to ensure the power supply of the electric equipment 107.
Based on the system provided by the embodiment of the invention, when a user needs to detect the standby battery in the transformer substation, the second switch group can be closed, so that a power supply path with minimum working voltage exists between the alternating current power supply and the electric equipment. And then the first switch group is disconnected to disconnect the original power supply path of the alternating current power supply and trigger the standby battery to supply power to the electric equipment. When the output voltage of the standby battery is lower than the minimum working voltage of the electric equipment, the alternating current power supply can supply power to the electric equipment through the power supply channel corresponding to the second switch group. By applying the system provided by the embodiment of the invention, the electric equipment can be used as the test load of the standby battery under the condition that the power supply of the transformer substation equipment is ensured, the performance of the standby battery is detected under the condition that the standby battery supplies power to the electric equipment, the discharge test of the standby battery is not performed manually by adopting the additional load, the discharge scene of the standby battery in the actual use process can be restored, and the test accuracy of the standby battery is improved.
Further, on the basis of the system provided by the foregoing embodiment, in the system provided by the embodiment of the present invention, the second ac/dc conversion device is further configured to:
responding to a second voltage regulation operation of the user on the second AC/DC conversion device, regulating the output voltage of the second AC/DC conversion device to a preset second voltage, wherein the preset second voltage is higher than the output voltage of the first AC/DC conversion device;
the second switch group is further configured to respond to a detection operation performed by the user on the second ac/dc conversion device in a process that the ac power supply supplies power to the electric device through the first ac/dc conversion device, and place the second switch group in a closed state, so as to detect whether the ac power supply can supply power to the electric device through the second ac/dc conversion device.
In the system provided by the embodiment of the invention, a user can detect the performance of the second alternating current-direct current conversion device under the condition that the alternating current power supply normally supplies power to the electric equipment before detecting the standby battery, namely, whether the device can normally work or not is detected, and whether the device can be converted into corresponding direct current voltage to output when the input alternating current voltage exists.
The user can adjust the output voltage of the second ac-dc conversion device to a preset second voltage, wherein the second voltage is higher than the output voltage of the first ac-dc conversion device in the system, the output voltage of the first ac-dc conversion device is usually the rated voltage of the electric equipment, and the second voltage is not higher than the maximum working voltage of the electric equipment, that is, the second voltage is a preset voltage within a range which is larger than the rated voltage of the electric equipment and smaller than the maximum working voltage of the electric equipment.
In the system provided by the embodiment of the invention, when the first alternating-current/direct-current conversion device and the second alternating-current/direct-current conversion device are in a working state, the output voltage set by the second alternating-current/direct-current conversion device is higher than the output voltage of the first alternating-current/direct-current conversion device, and if the first alternating-current/direct-current conversion device can work normally, the voltage output by the first alternating-current/direct-current conversion device in the current system supplies power to electric equipment according to the power supply characteristic of the direct-current voltage.
Under the condition that the output voltage value of the second AC-DC conversion device is set to be the second voltage, a user can close the second switch group, so that a circuit between the AC power supply and the second AC-DC conversion device and between the AC power supply and the electric equipment is a passage. Whether the alternating current power supply can supply power for the electric equipment through the second alternating current-direct current device can be detected by judging whether the voltage output by the second alternating current-direct current conversion device supplies power for the electric equipment at present. Specifically, the working voltage at two ends of the electric equipment can be obtained, whether the working voltage is matched with the output voltage value of the second alternating current-direct current conversion device or not is determined, if so, it is determined that the alternating current power supply can supply power through the second alternating current-direct current conversion device, and otherwise, the alternating current power supply cannot supply power.
Based on the system provided by the embodiment of the invention, the second AC/DC conversion device can be detected before the first switch group is disconnected and the standby battery is triggered to supply power, and the standby battery is triggered to supply power to detect under the condition that the second AC/DC conversion device meets the test condition of normal power supply. The power supply of the standby battery can be avoided under the condition that the second AC/DC conversion device fails, so that the situation that the standby battery cannot normally supply power is avoided, the AC power supply cannot supply power through the second AC/DC conversion device, the normal power utilization of electric equipment is guaranteed, and the reliability of power supply is improved.
Furthermore, on the basis of the system provided by the embodiment, the ac power supply in the system provided by the embodiment of the invention is a three-phase ac power supply.
In order to better illustrate the method provided by the embodiment of the present invention, on the basis of the system provided by the above embodiment, in combination with the schematic structural diagram shown in fig. 2, the embodiment of the present invention provides a power supply system of another substation device, as shown in fig. 2, where a first ac/dc converter 201, a second ac/dc converter 202, and a third ac/dc converter 203 are included in a first ac/dc conversion device in the system provided by the embodiment of the present invention;
The first switch group comprises a first switch S1, a second switch S2 and a third switch S3;
a first input end of the first ac/dc converter 201 is connected to a first phase line C of the ac power supply through the first switch S1, and a second input end of the first ac/dc converter 201 is connected to a zero line N of the ac power supply through the first switch S1;
the first input end of the second ac/dc converter 202 is connected to the second phase line B of the ac power supply through the second switch S2, and the second input end of the second ac/dc converter 202 is connected to the zero line N of the ac power supply through the second switch S2;
the first input end of the third ac/dc converter 203 is connected to the third phase line a of the ac power supply through the third switch S3, and the second input end of the third ac/dc converter 203 is connected to the zero line N of the ac power supply through the third switch S4.
In the system provided by the embodiment of the invention, the ac power supply is a three-phase ac power supply, as shown in fig. 2, A, B and C respectively represent three phase lines of the ac power supply, and N represents a zero line of the ac power supply. AC/DC means alternating current/direct current converter. The rightmost AC/DC converter 204 (AC/DC) is the second AC/DC converter in the system provided by the embodiment of the present invention. V represents a battery backup in an embodiment of the present invention. In the system provided by the embodiment of the present invention, each output end of each ac/dc conversion device (that is, each output end of each ac/dc converter in each ac/dc conversion device) and the backup battery are connected to the electric device 205 through the dc bus. The positive pole of the standby battery is connected with the positive bus in the direct current bus, and the negative pole of the standby battery is connected with the negative bus in the direct current bus.
Further, on the basis of the system provided in the above embodiment, as shown in fig. 2, in the system provided in the embodiment of the present invention, the second ac/dc conversion device includes a fourth ac/dc converter 204, and the second switch group includes a fourth switch S4;
the first input end of the fourth ac/dc converter 204 is connected to the first phase line C of the ac power supply through the fourth switch S4, and the second input end of the fourth ac/dc converter 204 is connected to the neutral line N of the ac power supply through the fourth switch S4.
In the power supply system provided by the embodiment of the invention, the positive output end of each alternating current/direct current converter is connected with the positive bus of the direct current bus, and the negative output end of each alternating current/direct current converter is connected with the negative bus of the direct current bus. One end of the electric equipment 205 is connected with a positive bus of the direct current bus, and the other end is connected with a negative bus of the direct current bus.
In the system provided by the embodiment of the invention, the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 are all double-pole single-throw switches, when the switches are disconnected, the two input ends corresponding to the alternating current/direct current converter can be disconnected with an alternating current power supply at the same time, and when the switches are closed, the two corresponding input ends can be connected with the alternating current power supply at the same time.
In the system provided by the embodiment of the present invention, the fourth ac/dc converter 204 is an ac/dc converter with adjustable output, while the first ac/dc converter 201, the second ac/dc converter 202 and the third ac/dc converter 203 may be fixed output ac/dc converters, and the output voltage of each ac/dc converter in the first ac/dc converter device may be fixed as the rated working voltage of the electric equipment.
For example, the rated operating voltage of the electric device is 54 v, so the first ac/dc converter 201, the second ac/dc converter 202, and the third ac/dc converter 203 may be ac/dc converters with an output voltage of 54 v. And the fourth ac/dc converter 204 may be a tunable ac/dc converter with a tuning range of 44 v to 57 v. The preset first voltage may be set to 44 volts and the preset second voltage to 57 volts.
It should be noted that, the schematic structural diagram shown in fig. 2 is only for better explaining a specific embodiment provided by the system provided by the embodiment of the present invention, and only a brief structure of a part of devices in the system is shown in the drawing, which is only for further illustrating the contents such as the first ac/dc conversion device and the second ac/dc conversion device in the system provided by the embodiment of the present invention, and is not limited to the structure of the devices in the practical application process. In a specific implementation process, the actual circuit is also provided with various circuit elements to ensure the operation of the circuit, such as resistors, capacitors, etc., which are not specifically described in the embodiment of the present invention, and fig. 2 also does not show the structure of such a device.
In order to better illustrate the system provided by the embodiment of the present invention, on the basis of the system shown in fig. 1, in combination with the schematic structural diagram shown in fig. 3, the system provided by the embodiment of the present invention further includes: a power distribution unit 108;
the standby battery 102, the output ends of the first ac/dc conversion device 103 and the output ends of the second ac/dc conversion device 104 are respectively connected with the electric equipment 107 through the power distribution unit 108;
the power distribution unit 108 is configured to monitor an output voltage of the first ac/dc conversion device 103, an output voltage of the second ac/dc conversion device 104, and an output voltage of the backup battery 102.
The system provided by the embodiment of the invention is also provided with a power distribution unit which is used for detecting the output voltage of each power supply device in the system so as to monitor the power supply state of the power supply system in real time. The power distribution unit (Power Distribution Unit, PDU), which refers to a cabinet power distribution outlet, is a product designed to provide power distribution for cabinet-mounted electrical equipment, can provide real-time power monitoring, and realize automatic alarm protection, and is an existing device, which is not described in detail herein.
It should be noted that the transmission branches of the power distribution unit 108 are independent of each other, and the structure shown in fig. 3 is only schematically illustrated. Each input of the power distribution unit 108 corresponds to one output to the electric device, for example, the output voltage of the first ac/dc conversion device 103 is still correspondingly output to the electric device 107 through the power distribution unit 108. The input voltage signals of the power distribution unit 108 have no influence on each other.
Based on the system provided by the embodiment of the invention, the output voltage of each power output device can be monitored through the power distribution unit, the power supply condition of the system can be conveniently and rapidly obtained, the alarm can be given out in time when the abnormality occurs, the reliability of the power supply of the device can be further improved, and the use experience of a user can be also improved.
Further, on the basis of the system provided by the above embodiment, the system provided by the embodiment of the present invention further includes: a display device;
the power distribution unit is connected with the display device;
the display device is used for displaying the output voltage of the first AC/DC conversion device, the output voltage of the second AC/DC conversion device and the output voltage of the standby battery, which are monitored by the power distribution unit.
The system provided by the embodiment of the invention is provided with the display device which can be connected with the power distribution unit, the output voltages of the first alternating current-direct current conversion device, the second alternating current-direct current conversion device and the standby battery, which are monitored by the power distribution unit in real time, are read, and the read voltage values are displayed in real time in a display interface of the display device.
Based on the system provided by the embodiment of the invention, the output voltage value of each power output device can be displayed in real time through the display device, so that a user can learn the power supply condition of the system conveniently, and the use experience of the user is further improved.
Based on the power supply method of the substation equipment provided by the embodiment of the invention, the embodiment of the invention also provides a power supply method of the substation equipment, which corresponds to the power supply system of the substation equipment shown in fig. 1, and is applied to the power supply system of the substation equipment, wherein the system comprises an alternating current power supply, a standby battery, electric equipment, a first alternating current-direct current conversion device, a second alternating current-direct current conversion device, a first switch group and a second switch group;
the method flow chart of the method is shown in fig. 4, and comprises the following steps:
S301: responding to a first voltage regulation operation of a user on the second AC/DC conversion device, regulating the output voltage of the second AC/DC conversion device to a preset first voltage, wherein the preset first voltage is the minimum working voltage of the electric equipment;
in the method provided by the embodiment of the invention, under the condition that the alternating current power supply supplies power through the first alternating current-direct current conversion device, a user can adjust the output voltage of the second alternating current-direct current conversion device in the power supply system, and the output voltage is adjusted to be the minimum working voltage of the electric equipment.
S302: in the process that the alternating current power supply supplies power to the electric equipment through the first alternating current-direct current conversion device, responding to the disconnection operation of a user on the alternating current power supply, and placing the first switch group in a disconnection state so as to trigger the standby battery to supply power to the electric equipment;
in the method provided by the embodiment of the invention, when a user needs to detect the standby battery, the first switch group can be disconnected, so that a circuit among the alternating current power supply, the first alternating current-direct current conversion device and the electric equipment is in an open circuit, and the standby battery in the system can be triggered to supply power for the electric equipment. The performance of the standby battery can be detected in the process that the standby battery supplies power for the electric equipment.
S303: and responding to the detection operation of the user on the standby battery, and placing the second switch group in a closed state so that the alternating current power supply supplies power to the electric equipment through the second alternating current-direct current conversion device when the output voltage of the standby battery is lower than the preset first voltage in the process that the standby battery supplies power to the electric equipment.
In the method provided by the embodiment of the invention, before the standby battery is detected, that is, before the first switch group is disconnected, or while the first switch group is disconnected, the second switch group is required to be in a closed state, so that a circuit among the alternating current power supply, the second alternating current-direct current conversion device and the electric equipment is in a channel state. In the process of supplying power by the standby battery, if the output voltage of the standby battery is higher than the minimum working voltage of the electric equipment, the standby battery is used for supplying power in the system, and when the output voltage of the standby battery is lower than the minimum voltage of the electric equipment, the alternating current power supply is used for supplying power.
Based on the method provided by the embodiment of the invention, when a user needs to detect the standby battery in the transformer substation, the second switch group can be closed, so that a power supply path with minimum working voltage exists between the alternating current power supply and the electric equipment. And then the first switch group is disconnected to disconnect the original power supply path of the alternating current power supply and trigger the standby battery to supply power to the electric equipment. When the output voltage of the standby battery is lower than the minimum working voltage of the electric equipment, the alternating current power supply can supply power to the electric equipment through the power supply channel corresponding to the second switch group. By applying the method provided by the embodiment of the invention, the electric equipment can be used as the test load of the standby battery under the condition of ensuring the power supply of the transformer substation equipment, the performance of the standby battery is detected under the condition that the standby battery supplies power to the electric equipment, the discharge test of the standby battery is not performed manually by adopting the additional load, the discharge scene of the standby battery in the actual use process can be restored, and the test accuracy of the standby battery is improved.
In order to better illustrate the method provided by the embodiment of the present invention, in combination with the flowchart shown in fig. 5, on the basis of the method provided by the foregoing embodiment, the method provided by the embodiment of the present invention further includes:
s401: responding to a second voltage regulation operation of the user on the second AC/DC conversion device, regulating the output voltage of the second AC/DC conversion device to a preset second voltage, wherein the preset second voltage is higher than the output voltage of the first AC/DC conversion device;
in the method provided by the embodiment of the invention, before the detection of the standby battery, a user can detect the second alternating current-direct current conversion device in the power supply system, and the output voltage of the second alternating current-direct current conversion device can be regulated to be a preset voltage higher than the output voltage of the first alternating current-direct current conversion device.
S402: and in the process that the alternating current power supply supplies power to the electric equipment through the first alternating current-direct current conversion device, responding to detection operation of the user on the second alternating current-direct current conversion device, and placing the second switch group in a closed state so as to detect whether the alternating current power supply can supply power to the electric equipment through the second alternating current-direct current conversion device.
In the method provided by the embodiment of the invention, under the condition that the output voltage of the second alternating current-direct current conversion device is the second voltage, a user can detect the second alternating current-direct current conversion device, so that the second switch group in the power supply system is in a closed state, a circuit among the alternating current power supply, the second alternating current-direct current conversion device and the electric equipment is in a passage state, and whether the alternating current power supply can supply power to the electric equipment through the second alternating current-direct current conversion device is detected, so as to determine whether the performance of the second alternating current-direct current conversion device is good.
Based on the method provided by the embodiment of the invention, the second AC/DC conversion device in the power supply system can be further detected, so that the second AC/DC conversion device can work normally under the condition of standby battery power supply, and the power supply of electric equipment is ensured.
Further, based on the method provided by the embodiment, in the method provided by the embodiment of the present invention, the power supply system further provides a power distribution unit, and in the method provided by the embodiment of the present invention, the method further includes:
and monitoring the output voltage of the first AC/DC conversion device, the output voltage of the second AC/DC conversion device and the output voltage of the standby battery through the power distribution unit.
In the method provided by the embodiment of the invention, the output ends of the power output equipment such as the first alternating current-direct current conversion device, the second alternating current-direct current conversion device, the standby battery and the like can be connected with the electric equipment through the power distribution unit. The output voltage of each power output device can be monitored through the power distribution unit, and the power distribution unit can automatically alarm when abnormality occurs.
In order to better explain the power supply system and method of the substation equipment provided by the embodiment of the invention, on the basis of the system shown in fig. 1, the embodiment of the invention further briefly describes the practical application of the power supply system of the substation equipment with reference to fig. 6 to 8.
In the practical application process, part of devices in the power supply system provided by the embodiment of the invention can be integrated in a case to work. As shown in the schematic internal structure of the chassis in fig. 6, the backup battery 501 and the backup battery 502 may be disposed in the chassis, and the backup battery 501 and the backup battery 502 are redundant backup power sources. The chassis is also provided with a controller 503, a circuit breaker (air switch) 504, a circuit breaker (air switch) 505, a dc bus 506, a fan 507 and a fan 508. In addition, the inside of the cabinet is provided with some connection members and devices which are arranged according to requirements, and not described in detail herein.
It should be noted that, the structure shown in fig. 6 is only schematically illustrated, and a detailed structure of a specific device is not shown, and in a specific application process, each device in the chassis may be connected by using a wire, and the wire structure is not shown in fig. 6.
As shown in the schematic front structure of fig. 7, the front of the chassis may be provided with a plurality of ventilation holes, and a control panel, and a user may perform corresponding settings through keys on the control panel, and a screen in the control panel may display a corresponding setting interface, and may be used to display a discharge characteristic curve of the battery backup, etc.
Further, the chassis (such as the chassis shown in fig. 6 and fig. 7) for loading the spare battery and other devices with box-type structures may be disposed in a cabinet, where a plurality of relevant devices of the power supply system corresponding to the electric devices may be disposed in one cabinet.
The device setting condition in the cabinet can be shown in fig. 8, the cabinet is provided with a monitoring device of two Power Distribution Units (PDU) from top to bottom, the voltage condition of the PDU is monitored, and a control switch for monitoring the output corresponding to the PDU is provided, for example, as shown in fig. 8, on the panel of the PDU, switches A1, A2, A3 and A4 corresponding to a are output, and switches B1, B2, B3 and B4 corresponding to B are output. And an indicator lamp is further arranged above each switch, and prompting effects such as alarming and the like can be achieved through lamplight. The control panel of the monitoring device is also provided with a display screen and control keys, and the monitoring device can be correspondingly arranged.
The main body device corresponding to the PDU is arranged in the cabinet, and each control switch for controlling each output of the PDU is arranged on the control panel of the main body device, as shown in FIG. 8, and the switches A1, A2, A3, A4, B1, B2, B3 and B4 on the panel corresponding to the power distribution unit are arranged on the control panel of the main body device. It should be noted that, in the structure shown in fig. 8, the switches on the device panel of the monitoring PDU and the switches on the device panel of the power distribution unit adopt the same identifier naming, which is that in the practical application scenario, in order to facilitate control, the naming is set for the signal channels of the corresponding power distribution unit, and the switches adopting the same identifier naming on different panels are not the same switch.
Two cabinets for holding the battery backup are also provided in the cabinet, and the cabinets are those shown in fig. 6 and 7.
The cabinet is also provided with a loop monitoring terminal, which refers to a terminal for monitoring the operation of equipment.
In an actual application scenario, a plurality of cabinets as shown in fig. 8 may be provided in the substation, for monitoring power supply conditions of each electric device in the substation. It should be noted that, the cabinet structure shown in fig. 8 is only a specific embodiment of deploying devices by adopting a cabinet structure, where the types of devices, the number of devices and the like set in the cabinet may be determined according to actual application requirements, and other devices may be set in the cabinet as required, so that the system or method provided by the embodiment of the present invention is not affected to implement functions.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for a system or system embodiment, since it is substantially similar to a method embodiment, the description is relatively simple, with reference to the description of the method embodiment being made in part. The systems and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A power supply system of substation equipment, comprising:
the system comprises an alternating current power supply, a standby battery, electric equipment, a first alternating current-direct current conversion device, a second alternating current-direct current conversion device, a first switch group and a second switch group;
the alternating current power supply is connected with each input end of the first alternating current-direct current conversion device through the first switch group, and is connected with each input end of the second alternating current-direct current conversion device through the second switch group;
the electric equipment is respectively connected with the standby battery, each output end of the first alternating current-direct current conversion device and each output end of the second alternating current-direct current conversion device;
The first switch group is used for responding to the disconnection operation of a user on the alternating current power supply in the process that the alternating current power supply supplies power to the electric equipment through the first alternating current-direct current conversion device, and is in a disconnection state so as to trigger the standby battery to supply power to the electric equipment;
the second ac/dc conversion device is configured to respond to a first voltage adjustment operation performed on the second ac/dc conversion device by the user, and adjust an output voltage of the second ac/dc conversion device to a preset first voltage, where the preset first voltage is a minimum working voltage of the electric device;
and the second switch group is used for responding to the detection operation of the user on the standby battery, and placing the second switch group in a closed state so that the alternating current power supply supplies power to the electric equipment through the second alternating current-direct current conversion device when the output voltage of the standby battery is lower than the preset first voltage in the process that the standby battery supplies power to the electric equipment.
2. The system of claim 1, wherein the second ac to dc conversion device is further configured to:
Responding to a second voltage regulation operation of the user on the second AC/DC conversion device, regulating the output voltage of the second AC/DC conversion device to a preset second voltage, wherein the preset second voltage is higher than the output voltage of the first AC/DC conversion device;
the second switch group is further configured to respond to a detection operation performed by the user on the second ac/dc conversion device in a process that the ac power supply supplies power to the electric device through the first ac/dc conversion device, and place the second switch group in a closed state, so as to detect whether the ac power supply can supply power to the electric device through the second ac/dc conversion device.
3. The system of claim 1, wherein the ac power source is a three-phase ac power source.
4. A system according to claim 3, wherein the first ac-dc conversion means comprises a first ac-dc converter, a second ac-dc converter and a third ac-dc converter;
the first switch group comprises a first switch, a second switch and a third switch;
a first input end of the first alternating current/direct current converter is connected with a first phase line of the alternating current power supply through the first switch, and a second input end of the first alternating current/direct current converter is connected with a zero line of the alternating current power supply through the first switch;
The first input end of the second alternating current/direct current converter is connected with a second phase line of the alternating current power supply through the second switch, and the second input end of the second alternating current/direct current converter is connected with a zero line of the alternating current power supply through the second switch;
the first input end of the third alternating current/direct current converter is connected with a third phase line of the alternating current power supply through the third switch, and the second input end of the third alternating current/direct current converter is connected with a zero line of the alternating current power supply through the third switch.
5. A system according to claim 3, wherein the second ac to dc conversion means comprises a fourth ac to dc converter and the second switch set comprises a fourth switch;
the first input end of the fourth alternating current/direct current converter is connected with the first phase line of the alternating current power supply through the fourth switch, and the second input end of the fourth alternating current/direct current converter is connected with the zero line of the alternating current power supply through the fourth switch.
6. The system of claim 1, further comprising: a power distribution unit;
the standby battery, the output ends of the first AC/DC conversion device and the output ends of the second AC/DC conversion device are respectively connected with the electric equipment through the power distribution unit;
The power distribution unit is used for monitoring the output voltage of the first alternating-current/direct-current conversion device, the output voltage of the second alternating-current/direct-current conversion device and the output voltage of the standby battery.
7. The system of claim 6, further comprising: a display device;
the power distribution unit is connected with the display device;
the display device is used for displaying the output voltage of the first AC/DC conversion device, the output voltage of the second AC/DC conversion device and the output voltage of the standby battery, which are monitored by the power distribution unit.
8. The power supply method of the transformer substation equipment is characterized by being applied to a power supply system of the transformer substation equipment, wherein the system comprises an alternating current power supply, a standby battery, electric equipment, a first alternating current-direct current conversion device, a second alternating current-direct current conversion device, a first switch group and a second switch group;
the method comprises the following steps:
responding to a first voltage regulation operation of a user on the second AC/DC conversion device, regulating the output voltage of the second AC/DC conversion device to a preset first voltage, wherein the preset first voltage is the minimum working voltage of the electric equipment;
In the process that the alternating current power supply supplies power to the electric equipment through the first alternating current-direct current conversion device, responding to the disconnection operation of a user on the alternating current power supply, and placing the first switch group in a disconnection state so as to trigger the standby battery to supply power to the electric equipment;
and responding to the detection operation of the user on the standby battery, and placing the second switch group in a closed state so that the alternating current power supply supplies power to the electric equipment through the second alternating current-direct current conversion device when the output voltage of the standby battery is lower than the preset first voltage in the process that the standby battery supplies power to the electric equipment.
9. The method as recited in claim 8, further comprising:
responding to a second voltage regulation operation of the user on the second AC/DC conversion device, regulating the output voltage of the second AC/DC conversion device to a preset second voltage, wherein the preset second voltage is higher than the output voltage of the first AC/DC conversion device;
and in the process that the alternating current power supply supplies power to the electric equipment through the first alternating current-direct current conversion device, responding to detection operation of the user on the second alternating current-direct current conversion device, and placing the second switch group in a closed state so as to detect whether the alternating current power supply can supply power to the electric equipment through the second alternating current-direct current conversion device.
10. The method of claim 8, wherein the system further comprises a power distribution unit, the method further comprising:
and monitoring the output voltage of the first AC/DC conversion device, the output voltage of the second AC/DC conversion device and the output voltage of the standby battery through the power distribution unit.
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Address after: 315000 Fortune Center on the North Bank of Jiangbei District, Ningbo City, Zhejiang Province, 10 buildings (3-1) (3-2) (4-2) Applicant after: Yongyao Science and Technology Branch of Ningbo Transmission and Transfer Construction Co.,Ltd. Applicant after: STATE GRID ZHEJIANG ELECTRIC POWER CO., LTD. NINGBO POWER SUPPLY Co. Address before: No. 1408, Liyuan North Road, Haishu District, Ningbo City, Zhejiang Province Applicant before: STATE GRID ZHEJIANG ELECTRIC POWER CO., LTD. NINGBO POWER SUPPLY Co. Applicant before: Yongyao Science and Technology Branch of Ningbo Transmission and Transfer Construction Co.,Ltd. |
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