CN112186877A - Energy storage online seamless switching power supply device based on emergency power supply vehicle and control method - Google Patents
Energy storage online seamless switching power supply device based on emergency power supply vehicle and control method Download PDFInfo
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- CN112186877A CN112186877A CN201910582328.1A CN201910582328A CN112186877A CN 112186877 A CN112186877 A CN 112186877A CN 201910582328 A CN201910582328 A CN 201910582328A CN 112186877 A CN112186877 A CN 112186877A
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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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- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention belongs to the technical field of emergency power supply, and particularly relates to an energy storage online seamless switching power supply device and a control method based on an emergency power supply vehicle. The method comprises the steps that an independent bidirectional energy storage inverter and a controlled change-over switch are adopted for binding linkage, the voltage, the frequency and the phase of a power supply are sampled and tracked in real time by using electric parameters, and the power supply is connected in parallel in a voltage source mode to realize energy storage online seamless switching power supply; the defects that in the prior art, two inverters are adopted, the investment is large, the loss of alternating current to direct current and alternating current to alternating current energy is large, the size and the weight are large, the transportation cost and the transportation difficulty are increased, the efficiency is improved, and the cost is reduced are overcome.
Description
Technical Field
The invention belongs to the technical field of emergency power supply, and particularly relates to an energy storage online seamless switching power supply device and a control method based on an emergency power supply vehicle.
Background
Electric power emergency guarantee is an increasingly inextricable tool and means in the modern society, and an emergency power supply vehicle is one of the common and effective modes. How to install quickly, ensure uninterrupted power supply and realize seamless switching when switching between power supplies is a key technology of emergency power protection and power supply; the scheme in the prior art is that seamless switching is realized by two bidirectional energy storage inverters back to back in a mode of converting alternating current into direct current and then converting the alternating current into alternating current (such as CN 109687492A); the control is simple, but the defects are obvious, such as large investment in adopting two inverters, large energy loss of alternating current to direct current and then alternating current, and large volume, and the transportation cost and difficulty are greatly increased.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention adopts the binding linkage of the single bidirectional energy storage inverter and the controlled change-over switch and utilizes the real-time sampling and tracking of the electrical parameters to realize the online seamless switching power supply of energy storage. Specifically disclosed are an energy storage online seamless switching power supply device based on an emergency power supply vehicle and a control method, which are characterized in that: the vehicle-mounted energy storage online seamless switching power supply device comprises an energy storage unit management system, a bidirectional energy storage inverter, an energy storage unit, a monitoring system, a system bus, a controlled switch, an electric parameter adoption sensor, a power grid side connecting terminal, a power utilization side connecting terminal and a device power input and output power line; the bidirectional energy storage inverter is connected with a device power input and output power line; the energy storage unit is connected with the bidirectional energy storage inverter; the controlled change-over switch is installed on a device power input and output power line and between a power grid side connecting terminal and a bidirectional energy storage inverter connecting part; the electrical parameter is mounted on a device power input output power line and between the controlled diverter switch and the grid side connection terminal using a sensor; the monitoring system is respectively connected with the energy storage unit management system, the bidirectional energy storage inverter, the controlled switch and the electric parameter sensor through a system bus to form a monitoring link of the energy storage online seamless switching power supply device;
the energy storage unit management system monitors the voltage, the current, the temperature and the electric quantity of an energy storage component in the energy storage unit in real time;
the connection and control method of the energy storage online seamless switching power supply device based on the emergency power supply vehicle comprises the following steps:
the energy storage online seamless switching power supply device is connected with a power grid power supply power line through a power grid side connecting terminal and is connected with a power grid power supply through a power grid power supply switch, and meanwhile, the power grid side connecting terminal is connected with a standby power supply power line and is connected with a standby power supply through a standby power supply switch, so that a power path for gating power supply of the power grid power supply and the standby power supply is formed; the power path of the load electricity is formed by connecting an electricity load power line by an electricity side connecting terminal and connecting an electricity load by an electricity load switch; the energy storage online seamless switching power supply system of the emergency power supply vehicle is formed, and the operation control method and the steps are as follows:
step K1: the monitoring system controls to start the energy storage online seamless switching power supply device, closes the controlled switch when the self-checking is normal, disconnects the standby power supply switch and closes the power grid power supply switch and the load power utilization switch in sequence to form a power path for the power grid power supply to supply power to the power utilization load;
step K2: the monitoring system 13 controls to start the bidirectional energy storage inverter, the bidirectional energy storage inverter tracks the voltage, the frequency and the phase of a power line of the power grid according to the information parameters of the electric parameter sampling sensor and operates in a voltage source mode to form a voltage source connected with the power grid in parallel, namely an online standby energy storage power source;
step K3: when a power supply of a power grid fails, a voltage source bidirectional energy storage inverter connected to a power input/output power line of the device supplies power, and meanwhile, the monitoring system controls to disconnect the controlled change-over switch, and at the moment, the electric energy is discharged and supplied by the energy storage unit;
step K4: when the standby power supply needs to be accessed for power supply, the standby power supply switch is closed, the bidirectional energy storage inverter tracks the voltage, frequency and phase of a power line of a power grid in real time according to the electric parameters by adopting the information parameters of the sensor, and after the same period, the controlled change-over switch is controlled to be closed by the monitoring system to form a power path for supplying power to the electric load by the standby power supply, and the voltage source formed by connecting the bidirectional energy storage inverter and the standby power supply in parallel is the online standby energy storage power supply;
step K5: when the power grid power supply recovers to be normal, a standby power supply switch is disconnected and the power grid power supply switch is closed, a voltage source bidirectional energy storage inverter connected in parallel with the standby power supply supplies power, meanwhile, a monitoring system controls to disconnect a controlled change-over switch, at the moment, electric energy is supplied by discharging of an energy storage unit, the bidirectional energy storage inverter tracks the voltage, the frequency and the phase of a power line of the power grid in real time by adopting sensor information parameters according to electric parameters, and after the same period, the monitoring system controls the controlled change-over switch to be closed, so that a power path of the power grid power;
step K6: when the energy storage online seamless switching power supply device needs to be withdrawn, the load power utilization switch, the power grid power supply switch, the controlled switch and the energy storage online seamless switching power supply device are sequentially switched off, the power grid side connecting terminal and the power utilization side connecting terminal are disconnected at the moment, the energy storage online seamless switching power supply device is successfully withdrawn, then the power grid power supply power line is connected with the power utilization load power line, the power grid power supply switch and the load power utilization switch are sequentially switched on, and the power grid power supply is recovered to supply power for the power utilization load.
An energy storage online seamless switching power supply device and a control method based on an emergency power supply vehicle are disclosed, wherein an independent bidirectional energy storage inverter is bound and linked with a controlled switch, and the voltage, the frequency and the phase of a power supply are sampled and tracked in real time by using electric parameters, and are connected in parallel in a voltage source mode to realize energy storage online seamless switching power supply; the defects that in the prior art, two inverters are adopted, the investment is large, the loss of alternating current to direct current and alternating current to alternating current energy is large, the size and the weight are large, the transportation cost and the transportation difficulty are increased, the efficiency is improved, and the cost is reduced are overcome.
Drawings
Fig. 1 is a schematic diagram of a configuration principle of an energy storage online seamless switching power supply device based on an emergency power supply vehicle.
Detailed Description
An energy storage online seamless switching power supply device and a control method based on an emergency power supply train are described as an implementation example with reference to the accompanying drawings, however, the described implementation example is a part of the implementation example of the invention, and is not a whole implementation example. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The techniques and schemes of the present invention are not limited to those given in this example.
As shown in fig. 1, an energy storage online seamless switching power supply device and a control method based on an emergency power supply vehicle are characterized in that: the vehicle-mounted energy storage online seamless switching power supply device comprises an energy storage unit management system 10, a bidirectional energy storage inverter 11, an energy storage unit 12, a monitoring system 13, a system bus 14, a controlled switch 15, an electric parameter adoption sensor 16, a power grid side connecting terminal 17, a power utilization side connecting terminal 18 and a device power input and output power line 19; the bidirectional energy storage inverter 11 is connected with a device power input and output power line 19; the energy storage unit 12 is connected with the bidirectional energy storage inverter 11; the controlled change-over switch 15 is mounted on the device power input output power line 19 and between the grid side connection terminal 17 and the bi-directional energy storage inverter 11 connection; the electrical parameter is mounted on the device power input output power line 19 and between the controlled diverter switch 15 and the grid-side connection terminal 17 with a sensor 16; the monitoring system 13 is respectively connected with the energy storage unit management system 10, the bidirectional energy storage inverter 11, the controlled change-over switch 15 and the electric parameter sensor 16 through a system bus 14 to form a monitoring link of the energy storage online seamless switching power supply device;
the energy storage unit management system 10 monitors the voltage, current, temperature and electric quantity of the energy storage components in the energy storage unit 12 in real time;
the connection and control method of the energy storage online seamless switching power supply device based on the emergency power supply vehicle comprises the following steps:
the energy storage online seamless switching power supply device is connected with a power supply power line 23 of a power grid through a power supply side connecting terminal 17 and is connected with a power supply 21 of the power grid through a power supply switch 22 of the power grid, and is connected with a power supply line 43 of a standby power supply through the power supply switch 42 of the standby power supply through the power supply side connecting terminal 17 to form a power path for gating power supply of the power supply 21 of the power grid and the power supply 41 of the standby power supply; an electric power path for load electricity is formed by connecting an electric load power line 33 to the electricity-using side connection terminal 18 and connecting an electric load 31 to the electricity-using load switch 32; the energy storage online seamless switching power supply system of the emergency power supply vehicle is formed, and the operation control method and the steps are as follows:
step K1: the monitoring system 13 controls to start the energy storage online seamless switching power supply device, closes the controlled switch 15 when the self-checking is normal, disconnects the standby power supply switch 42, and sequentially closes the power grid power supply switch 22 and the load power utilization switch 32 to form a power path for supplying power to the power utilization load 31 by the power grid power supply 21;
step K2: the monitoring system 13 controls to start the bidirectional energy storage inverter 11, the bidirectional energy storage inverter 11 tracks the voltage, the frequency and the phase of a power line of the power grid according to the information parameters of the electrical parameter sampling sensor 16 in real time and operates in a voltage source mode to form a voltage source connected with the power grid in parallel, namely an online standby energy storage power source;
step K3: when the power grid 21 fails, the power supply of the voltage source bidirectional energy storage inverter 11 connected to the power input/output power line 19 of the device supplies power, and meanwhile, the monitoring system 13 controls to disconnect the controlled change-over switch 15, and the electric energy at the moment is discharged and supplied by the energy storage unit 12;
step K4: when the standby power supply 41 needs to be connected for supplying power, the standby power supply switch 42 is closed, the bidirectional energy storage inverter 11 tracks the voltage, the frequency and the phase of a power line of a power grid in real time by using the information parameters of the sensor 16 according to the electric parameters, and after the same period, the monitoring system 13 controls the controlled change-over switch 15 to be closed, so that a power path for supplying power to the electric load 31 by the standby power supply 41 is formed, and a voltage source formed by connecting the bidirectional energy storage inverter 11 with the standby power supply in parallel is an online standby energy storage power supply;
step K5: when the power grid power supply 21 is recovered to be normal, the standby power supply switch 42 is disconnected and the power grid power supply switch 22 is closed, the power supply of the voltage source bidirectional energy storage inverter 11 connected in parallel with the standby power supply supplies power, meanwhile, the monitoring system 13 controls the disconnection of the controlled change-over switch 15, at the moment, the electric energy is discharged and supplied by the energy storage unit 12, the bidirectional energy storage inverter 11 tracks the voltage, the frequency and the phase of a power line of the power grid in real time by adopting information parameters of the sensor 16 according to the electric parameters, and after the same period, the monitoring system 13 controls the controlled change-over switch 15 to be closed, so that an electric;
step K6: when the energy storage online seamless switching power supply device needs to be withdrawn, the load power utilization switch 32, the power grid power supply switch 22, the controlled switch 15 and the energy storage online seamless switching power supply device are sequentially switched off, the power grid side connecting terminal 17 and the power utilization side connecting terminal 18 are disconnected at the moment, the energy storage online seamless switching power supply device is successfully withdrawn, the power grid power supply power line 23 and the power utilization load power line 33 are connected, the power grid power supply switch 22 and the load power utilization switch 32 are sequentially switched on, and the power grid power supply 21 is recovered to supply power for the power utilization load 31.
An energy storage online seamless switching power supply device and a control method based on an emergency power supply vehicle are disclosed, wherein an independent bidirectional energy storage inverter is bound and linked with a controlled switch, and the voltage, the frequency and the phase of a power supply are sampled and tracked in real time by using electric parameters, and are connected in parallel in a voltage source mode to realize energy storage online seamless switching power supply; the defects that in the prior art, two inverters are adopted, the investment is large, the loss of alternating current to direct current and alternating current to alternating current energy is large, the size and the weight are large, the transportation cost and the transportation difficulty are increased, the efficiency is improved, and the cost is reduced are overcome.
It should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments can be modified, or some technical features can be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (1)
1. An energy storage online seamless switching power supply device based on an emergency power supply vehicle and a control method are characterized in that: the vehicle-mounted energy storage online seamless switching power supply device comprises an energy storage unit management system, a bidirectional energy storage inverter, an energy storage unit, a monitoring system, a system bus, a controlled switch, an electric parameter adoption sensor, a power grid side connecting terminal, a power utilization side connecting terminal and a device power input and output power line; the bidirectional energy storage inverter is connected with a device power input and output power line; the energy storage unit is connected with the bidirectional energy storage inverter; the controlled change-over switch is installed on a device power input and output power line and between a power grid side connecting terminal and a bidirectional energy storage inverter connecting part; the electrical parameter is mounted on a device power input output power line and between the controlled diverter switch and the grid side connection terminal using a sensor; the monitoring system is respectively connected with the energy storage unit management system, the bidirectional energy storage inverter, the controlled switch and the electric parameter sensor through a system bus to form a monitoring link of the energy storage online seamless switching power supply device;
the energy storage unit management system monitors the voltage, the current, the temperature and the electric quantity of an energy storage component in the energy storage unit in real time;
the connection and control method of the energy storage online seamless switching power supply device based on the emergency power supply vehicle comprises the following steps:
the energy storage online seamless switching power supply device is connected with a power grid power supply power line through a power grid side connecting terminal and is connected with a power grid power supply through a power grid power supply switch, and meanwhile, the power grid side connecting terminal is connected with a standby power supply power line and is connected with a standby power supply through a standby power supply switch, so that a power path for gating power supply of the power grid power supply and the standby power supply is formed; the power path of the load electricity is formed by connecting an electricity load power line by an electricity side connecting terminal and connecting an electricity load by an electricity load switch; the energy storage online seamless switching power supply system of the emergency power supply vehicle is formed, and the operation control method and the steps are as follows:
step K1: the monitoring system controls to start the energy storage online seamless switching power supply device, closes the controlled switch when the self-checking is normal, disconnects the standby power supply switch and closes the power grid power supply switch and the load power utilization switch in sequence to form a power path for the power grid power supply to supply power to the power utilization load;
step K2: the monitoring system 13 controls to start the bidirectional energy storage inverter, the bidirectional energy storage inverter tracks the voltage, the frequency and the phase of a power line of the power grid according to the information parameters of the electric parameter sampling sensor and operates in a voltage source mode to form a voltage source connected with the power grid in parallel, namely an online standby energy storage power source;
step K3: when a power supply of a power grid fails, a voltage source bidirectional energy storage inverter connected to a power input/output power line of the device supplies power, and meanwhile, the monitoring system controls to disconnect the controlled change-over switch, and at the moment, the electric energy is discharged and supplied by the energy storage unit;
step K4: when the standby power supply needs to be accessed for power supply, the standby power supply switch is closed, the bidirectional energy storage inverter tracks the voltage, frequency and phase of a power line of a power grid in real time according to the electric parameters by adopting the information parameters of the sensor, and after the same period, the controlled change-over switch is controlled to be closed by the monitoring system to form a power path for supplying power to the electric load by the standby power supply, and the voltage source formed by connecting the bidirectional energy storage inverter and the standby power supply in parallel is the online standby energy storage power supply;
step K5: when the power grid power supply recovers to be normal, a standby power supply switch is disconnected and the power grid power supply switch is closed, a voltage source bidirectional energy storage inverter connected in parallel with the standby power supply supplies power, meanwhile, a monitoring system controls to disconnect a controlled change-over switch, at the moment, electric energy is supplied by discharging of an energy storage unit, the bidirectional energy storage inverter tracks the voltage, the frequency and the phase of a power line of the power grid in real time by adopting sensor information parameters according to electric parameters, and after the same period, the monitoring system controls the controlled change-over switch to be closed, so that a power path of the power grid power;
step K6: when the energy storage online seamless switching power supply device needs to be withdrawn, the load power utilization switch, the power grid power supply switch, the controlled switch and the energy storage online seamless switching power supply device are sequentially switched off, the power grid side connecting terminal and the power utilization side connecting terminal are disconnected at the moment, the energy storage online seamless switching power supply device is successfully withdrawn, then the power grid power supply power line is connected with the power utilization load power line, the power grid power supply switch and the load power utilization switch are sequentially switched on, and the power grid power supply is recovered to supply power for the power utilization load.
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Cited By (1)
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| CN114567014A (en) * | 2022-04-29 | 2022-05-31 | 武汉大学 | Flexible change-over switch with voltage supporting function and control method thereof |
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