CN115473225B - User privacy active defense type electric energy conversion system and method - Google Patents

User privacy active defense type electric energy conversion system and method Download PDF

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Publication number
CN115473225B
CN115473225B CN202211347209.6A CN202211347209A CN115473225B CN 115473225 B CN115473225 B CN 115473225B CN 202211347209 A CN202211347209 A CN 202211347209A CN 115473225 B CN115473225 B CN 115473225B
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power
mode
electric energy
module
current
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CN115473225A (en
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谭敏刚
钱俊良
陈斌
张潮海
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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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
    • 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
    • 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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • 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
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/70—Load identification

Abstract

The invention discloses a user privacy active defense type electric energy conversion system and a method, and relates to the technical field of new generation information. The interface unit provides power input and an electric equipment access port, and is connected with the electric energy conversion unit to form an energy channel. The central control unit uniformly dispatches the electric energy conversion unit and the electric energy storage unit and adjusts the voltage and the current of the power supply input port. The system presents electrical characteristics unrelated to actual operation of the power equipment, and actively defends the non-invasive detection equipment from stealing user privacy.

Description

User privacy active defense type electric energy conversion system and method
Technical Field
The technology disclosed by the invention relates to electric energy conversion, in particular to a user privacy active defense type electric energy conversion system and method.
Background
The non-intrusive monitoring technology is characterized in that a monitoring device is arranged on a line of a power consumer to the home, the running state of power equipment in each time period is identified, the equipment structure, the power utilization behavior and the habit of the user are further analyzed, and a data base is provided for other commercial behaviors. The technology enables the privacy of power users to be greatly threatened, privacy disclosure lighters enable the users to be full of frequent harassments of sales and advertisements, adverse social problems and malignant crimes can be caused under severe conditions, and therefore it is very important to actively defend a non-invasive device from the source to acquire user information.
Disclosure of Invention
In order to solve the problems, the invention discloses a user privacy active defense type electric energy conversion system and a method. The method has the advantages that the key input signal required by the non-invasive monitoring equipment, namely the working current of the actual load of a user, is shielded through an electric energy storage and conversion technology, so that the load identification function of the non-invasive monitoring equipment is invalid, the privacy of the user is protected, and the effect of actively preventing the privacy of the user from being revealed is achieved.
A user privacy active defense type electric energy conversion system comprises a central control unit, an electric energy storage unit, an electric energy conversion unit and an interface unit. The interface unit provides power input and an electric power equipment access port and is connected with the electric energy conversion unit to form an energy channel. The central control unit uniformly dispatches the electric energy conversion unit and the electric energy storage unit, and maintains the voltage and the current of the power input port. The system presents electrical characteristics unrelated to actual operation of the power equipment, and actively defends non-invasive detection equipment from stealing user privacy.
The interface unit is divided into a power input port and a power-taking port of the power equipment, and the power-taking port comprises an alternating current power-taking port and a direct current power-taking port.
The power supply input port is externally connected to an output port of a user electric meter, and the alternating current power taking port and the direct current power taking port are externally used for accessing an alternating current load and a direct current load of a user side respectively. The interface unit is internally connected to the electric energy conversion unit.
A user privacy active defense type electric energy conversion method is characterized in that an electric energy conversion unit comprises a rectification module (alternating current-direct current conversion), an inversion module (direct current-alternating current conversion), a voltage regulation module (direct current level regulation) and a current conversion module (alternating current power supply switching). The input port of the interface unit is connected to the rectifying module to provide an energy source for the system; the alternating current power taking port is connected to the parallel output ends of the inversion module and the current conversion module and supplies power for an alternating current load; the direct current electricity taking port is connected to the voltage regulating module to supply power for the direct current load.
And the direct current sides of the rectification module, the inversion module and the voltage regulation module are connected with the central control unit and the electric energy storage unit in parallel through a direct current bus. The direct current bus provides an uninterrupted power supply for the central control unit, and normal work of the central control unit and the voltage regulating module is ensured; namely, the central control unit and the voltage regulating module are used as direct current loads at any time. The electric energy storage unit and other electric energy conversion units connected in parallel have 4 working modes, and any two working modes can be switched.
Before switching the mode, a user needs to select a load to be put into or taken out from the central control unit; for short: the load is varied. The electric energy conversion unit is communicated with the central control unit, and a switching instruction between working modes is determined by the central control unit according to the power of the variable load; the central control unit takes active power and reactive power as attributes to store all load information of users, and the variable load is one of the storage load libraries of the central control unit.
The invention further improves that: the 4 working modes are as follows:
(1) Mode a (stored energy charging): the rectification module is used as a unique power supply, supplies power to the alternating current power taking port through the current conversion module, charges the electric energy storage unit through the direct current bus and supplies power to the direct current load;
(2) Mode B (ac heavy load): the rectifier module and the electric energy storage unit are used as a power supply together, and the rectifier module supplies power to the alternating current power taking port through the current conversion module. The electric energy storage unit supplies power to the inversion module through the direct current bus to supply power to the direct current load;
(3) Mode C (dc heavy load): the rectification module and the electric energy storage unit are used as a power supply together, and the rectification module supplies power to the alternating current power taking port through the current conversion module. The electric energy storage unit and the rectifier module supply power to the direct current load through the direct current bus;
(4) Mode D (system off grid): the rectifying module and the current conversion module quit operation, the electric energy storage unit serves as a unique power supply, and the rectifying module and the direct current load are supplied with power through the direct current bus.
The working mode switching mode is as follows:
mode a → mode B: switching the working mode of the electric energy storage unit into discharging by taking the constant current of the power supply input port of the rectification module as a control target, starting the inversion module to supply power to the alternating current power taking port, and starting the alternating current heavy load;
mode a → mode C: switching the working mode of the electric energy storage unit into discharging by taking the constant current of the power input port of the rectification module as a control target, and starting a direct-current heavy load;
mode a → mode D: switching the working mode of the electric energy storage unit to discharge, setting the working mode of the electric energy storage unit to be off-grid, starting the inversion module to supply power to the alternating current power taking port, exiting the current conversion module, and exiting the rectification module;
mode B → mode a: the method comprises the following steps that with the constant current of a power supply input port of a rectification module as a control target, the working mode of an electric energy storage unit is switched to charge, an alternating current heavy load is stopped, and an inversion module stops supplying power to an alternating current power taking port;
mode B → mode C: the method comprises the steps that the current of a power supply input port of a rectification module is constant to serve as a control target, the discharge power of an electric energy storage unit is gradually increased, a direct current heavy load is started, an alternating current heavy load is stopped, and the power supply power of an inversion module to an alternating current power taking port is gradually reduced;
mode B → mode D: setting the working mode of the electric energy storage unit as off-grid, exiting the current conversion module and exiting the rectification module;
mode C → mode a: switching the working mode of the electric energy storage unit to charge by taking the constant input current of the power interface end of the rectifier module as a control target, and stopping the direct-current heavy load;
mode C → mode B: the method comprises the steps that the current of a power input port of a rectification module is constant to serve as a control target, the power supply power of an inversion module to an alternating current power taking port is gradually increased, an alternating current heavy load is started, a direct current heavy load is stopped, and the discharge power of an electric energy storage unit is gradually reduced;
mode C → mode D: setting the working mode of the electric energy storage unit to be off-grid, starting the inversion module to supply power to the alternating current power taking port, exiting the current conversion module, and exiting the rectification module;
mode D → mode a: starting a rectification module, starting a current conversion module, quitting the inversion module, and setting the working mode of an electric energy storage unit to be grid-connected charging;
mode D → mode B: starting a rectification module, starting a current conversion module, and setting the working mode of the electric energy storage unit as grid-connected discharge;
mode D → mode C: starting the rectification module, starting the current conversion module, exiting the inversion module, and setting the working mode of the electric energy storage unit to be grid-connected discharge.
The instructions comprise binary instructions and continuous instructions, the binary instructions control the starting and stopping of each module in the electric energy conversion unit, and the continuous instructions are used for adjusting grid connection, grid disconnection, charging and discharging modes and operating power of the electric energy storage unit. The binary instructions are sequentially executed according to the switching process between the modes, and the decision basis of the continuous instructions is to keep the current of the power supply input port constant by adjusting the active power and the reactive power of the electric energy storage unit.
The continuous instruction basis is as follows:
Figure GDA0004033641070000051
wherein X includes active power and reactive power (power for short), X 0 For power input to rectifier module, X 1 Power consumed for AC loads, X 2 Power consumed for DC loads, X 3 δ X is the power that will be consumed by the varying load for the power that is consumed by the system. The electrical energy storage unit is in a discharge mode when X is positive and in a charge mode when X is negative.
The invention has the beneficial effects that: the method has the advantages that the key input signal required by the non-invasive monitoring equipment, namely the working current of the actual load of a user, is shielded through an electric energy storage and conversion technology, so that the load identification function of the non-invasive monitoring equipment is invalid, the privacy of the user is protected, and the effect of actively preventing the privacy of the user from being revealed is achieved.
Drawings
Fig. 1 is a block diagram of a user privacy active defense type power conversion system.
Fig. 2 shows the system operating mode a-energy storage charging.
FIG. 3 shows the system operating mode B- -AC overload.
Fig. 4 shows the system operating mode C-dc reload.
Fig. 5 shows the system operating mode D-system off-grid.
Wherein, the first and the second end of the pipe are connected with each other,
Figure GDA0004033641070000061
list of reference numerals:
wherein 1-a central control unit; 2-an electrical energy storage unit; 3-a rectifying module, 4-an inverting module and 5-a voltage regulating module; 6, a current conversion module; 7-power input port; 8-an alternating current power taking port; 9-direct current getting port.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and detailed description, which will be understood as being illustrative only and not limiting in scope. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1, fig. 1 is a block diagram of a user privacy active defense type power conversion system.
The active defense type electric energy conversion system for the privacy of the user comprises a central control unit (1), an electric energy storage unit (2), an electric energy conversion unit and an interface unit, wherein S1 is a direct current energy channel, S2 is an alternating current energy channel, and S3 is a control signal channel. The interface unit provides power input and an electric power equipment access port and is connected with the electric energy conversion unit to form an energy channel. The central control unit 1 uniformly dispatches the electric energy conversion unit and the electric energy storage unit and maintains the voltage and the current of the power input port; the interface unit is divided into a power input port 7 and a power-taking port of the power equipment, and the power-taking port comprises an alternating current power-taking port 8 and a direct current power-taking port 9; the power supply input port is externally connected to an output port of a user electric meter, the alternating current power taking port and the direct current power taking port are externally used for accessing an alternating current load and a direct current load of a user side respectively, and the interface unit is internally connected to the electric energy conversion unit.
The electric energy conversion unit comprises a rectification module 3, an inversion module 4, a voltage regulation module 5 and a current conversion module 6. The input port of the interface unit is connected to the rectification module to provide an energy source for the system; the alternating current power taking port is connected to the parallel output ends of the inversion module and the current conversion module and supplies power for an alternating current load; the direct current electricity taking port is connected to the voltage regulating module to supply power for the direct current load.
The direct current sides of the rectification module, the inversion module and the voltage regulation module are connected with the central control unit and the electric energy storage unit in parallel to form a direct current bus. The direct current bus provides an uninterrupted power supply for the central control unit, so that the central control unit and the voltage regulating module can work normally, and the central control unit and the voltage regulating module can be used as direct current loads at any time. The electric energy storage unit and other electric energy conversion units connected in parallel have 4 working modes, and any two working modes can be switched.
Before switching the mode, the user needs to select the load to be put into or taken out (simply called change load) at the central control unit. Communication exists between the electric energy conversion unit and the central control unit, and switching instructions between working modes are determined by the central control unit according to the power of the variable load.
Fig. 2 shows the system operating mode a-energy storage charging.
The rectification module 3 is used as a unique power supply, supplies power to the alternating current power taking port 8 through the current conversion module 6, charges the electric energy storage unit 2 through the direct current bus, supplies power to the direct current power taking port 9 and the central control unit 1, and the inversion module 4 is not started (shadow filling, the same below);
FIG. 3 shows the system operating mode B- -AC overload.
The rectifier module 3 and the electric energy storage unit 2 are used as a power supply together, and the rectifier module 3 supplies power to the alternating current power taking port 8 through the current conversion module 6. The electric energy storage unit 2 supplies power to the alternating current power taking port through the direct current bus and the inversion module 4, and supplies power to the direct current power taking port 9 and the central control unit 1 through the direct current bus;
FIG. 4 shows the system operating mode C- -DC reload.
The rectifier module 3 and the electric energy storage unit 2 are used as a power supply together, and the rectifier module supplies power to the alternating current power taking port through the current conversion module. The electric energy storage unit and the rectification module supply power to the direct current load through the direct current bus, and the inversion module 4 is not started;
fig. 5 shows the system operating mode D-system off-grid.
The rectifying module 3 and the current conversion module 6 are out of operation, the electric energy storage unit 2 serves as a unique power supply, and power is supplied to the rectifying module 4 and the voltage regulating module 5 through the direct current bus.
An example of the mode of operation switching is as follows:
for convenience of understanding, the following convention is made in this embodiment: before the working mode is switched, the active power and the reactive power output by the electric energy storage unit in the current working mode alpha are set to be P alpha and Q alpha, and the active power and the reactive power output after the working mode beta is switched to be P beta and Q beta.
Setting the output power of P alpha and Q alpha to be positive direction, and if the electric energy storage unit is charged, the value is negative. The active power and the reactive power of the variable load (switched in or switched off) are delta P and delta Q, the power consumed by the variable load is set to be a positive direction, the signs of the delta P and the delta Q are positive when the load is switched in, and the signs of the delta P and the delta Q are negative when the load is switched off. δ P and δ Q are stored in the load bank of the central control unit.
Mode a → mode B:
the central control unit 1 confirms δ P and δ Q, and the central control unit 1 transmits an operation mode switching (charge → discharge) and power value (P β = P α + δ P, Q β = Q α + δ Q) instruction to the electric energy storage unit 2, and transmits a start output instruction to the inverter module 4 to start the ac heavy load.
Mode a → mode C:
the central control unit 1 confirms δ P and δ Q, and the central control unit 1 transmits an operation mode switching (charge → discharge) and power value (P β = P α + δ P, Q β = Q α + δ Q) instruction to the electric energy storage unit 2 to start the dc heavy load.
Mode a → mode D:
when the central control unit 1 confirms δ P and δ Q, the central control unit 1 transmits the operation mode switching (charging → discharging, grid connection → grid disconnection) to the electric energy storage unit 2, transmits the start instruction to the inverter module 4, transmits the exit instruction to the commutation module 6, and transmits the exit instruction to the rectifier module 3.
Mode B → mode a:
the central control unit 1 confirms δ P and δ Q, and the central control unit 1 transmits an operation mode switching (discharging → charging) and power value (P β = P α + δ P, Q β = Q α + δ Q) instruction to the electric energy storage unit 2, stops the ac heavy load, and transmits a quit instruction to the inverter module 4.
Mode B → mode C:
when the central control unit 1 confirms δ P and δ Q, the central control unit 1 transmits a power value (P β = P α + δ P, Q β = Q α + δ Q) command to the electric energy storage unit 2, starts the dc heavy load, stops the ac heavy load, and transmits a quit command to the inverter module 4.
Mode B → mode D:
the central control unit 1 confirms δ P and δ Q, and the central control unit 1 sends the operation mode switching (grid connection → grid disconnection) to the electric energy storage unit 2, sends the quit instruction to the commutation module 6, and sends the quit instruction to the rectification module 3.
Mode C → mode a:
the central control unit 1 confirms δ P and δ Q, and the central control unit 1 transmits an operation mode switching (discharging → charging) and power value (P β = P α + δ P, Q β = Q α + δ Q) instruction to the electric energy storage unit 2 to stop the dc heavy load.
Mode C → mode B:
the central control unit 1 confirms δ P and δ Q, and the central control unit 1 transmits a power value (P β = P α + δ P, Q β = Q α + δ Q) instruction to the electric energy storage unit 2, starts the ac heavy load, and stops the dc heavy load.
Mode C → mode D:
the central control unit 1 confirms δ P and δ Q, and the central control unit 1 sends the working mode switching (grid connection → grid disconnection) to the electric energy storage unit 2, sends a starting instruction to the inversion module 4, sends a quitting instruction to the commutation module 6, and sends a quitting instruction to the rectification module 3.
Mode D → mode a:
the central control unit 1 confirms delta P and delta Q, the central control unit 1 sends a starting instruction to the rectification module 3, a starting instruction to the current conversion module 6, a quitting instruction to the inversion module 4, and a work mode switching (off-grid → on-grid, discharging → charging) and power value to the electric energy storage unit 2
(P β = P α + δ P, Q β = Q α + δ Q) instruction.
Mode D → mode B:
the central control unit 1 confirms δ P and δ Q, and the central control unit 1 sends a start instruction to the rectification module 3, a start instruction to the commutation module 6, and an operation mode switching (off-grid → on-grid) and power value (P β = P α + δ P, Q β = Q α + δ Q) instruction to the electric energy storage unit 2.
Mode D → mode C:
the central control unit 1 confirms delta P and delta Q, the central control unit 1 sends a starting instruction to the rectification module 3, a starting instruction to the current conversion module 6, a quitting instruction to the inversion module 4, and a work mode switching (off-grid → on-grid) and power value (P) to the electric energy storage unit 2 β ＝P α +δP，Q β ＝Q α + δ Q) instruction.
The technical means disclosed in the scheme of the invention are not limited to the technical means disclosed in the above embodiments, but also include the technical means formed by any combination of the above technical features.

Claims (1)

1. A user privacy active defense type electric energy conversion system is characterized in that: the system comprises a central control unit (1), an electric energy storage unit (2), an electric energy conversion unit and an interface unit; the interface unit is divided into a power input port (7) and a power-taking port of the power equipment, and the power-taking port comprises an alternating current power-taking port (8) and a direct current power-taking port (9); the electric energy conversion unit comprises a rectification module (3), an inversion module (4), a voltage regulation module (5) and a current conversion module (6); a power input port (7) of the interface unit is connected to the rectification module (3) and is externally connected to an output port of a user electric meter; the alternating current power taking port (8) is connected to the parallel output ends of the inversion module (4) and the current conversion module (6) and supplies power for an alternating current load; the direct current electricity taking port (9) is connected to the voltage regulating module and supplies power for a direct current load; the central control unit (1) uniformly dispatches the electric energy conversion unit and the electric energy storage unit to maintain the voltage and the current of the power supply input port; the alternating current power taking port (8) and the direct current power taking port (9) are externally used for alternating current load access and direct current load access of a user side respectively; the direct current sides of the rectification module, the inversion module and the voltage regulation module are connected with the central control unit and the electric energy storage unit in parallel to form a direct current bus; the direct current bus provides an uninterrupted power supply for the central control unit, and normal work of the central control unit and the voltage regulating module is ensured; the electric energy storage unit (2) and other electric energy conversion units connected in parallel have 4 working modes, and any two working modes can be switched; before switching the mode, a user needs to select a load to be put into or taken out from the central control unit, which is called as a variable load; the electric energy conversion unit is communicated with the central control unit, and a switching instruction between working modes is determined by the central control unit according to the power of the variable load; the central control unit takes active power and reactive power as attributes to store all load information of users, and the variable load is one of the storage load libraries of the central control unit; the 4 working modes are as follows:
(1) Mode A, energy storage charging: the rectification module is used as a unique power supply, supplies power to the alternating current power taking port through the current conversion module, charges the electric energy storage unit through the direct current bus and supplies power to the direct current load;
(2) Mode B: exchange heavy load: the rectifier module and the electric energy storage unit are used as a power supply together, and the rectifier module supplies power to the alternating current power taking port through the current conversion module; the electric energy storage unit supplies power for the inversion module through the direct current bus and supplies power for the direct current load;
(3) And a mode C: d, direct current heavy load: the rectification module and the electric energy storage unit are used as a power supply together, and the rectification module supplies power to the alternating current power taking port through the current conversion module; the electric energy storage unit and the rectifier module supply power to the direct current load through the direct current bus;
(4) Mode D: and (3) system off-grid: the rectifying module and the current conversion module quit operation, the electric energy storage unit serves as a unique power supply, and the rectifying module and the direct current load are supplied with power through the direct current bus;
the working mode switching mode is as follows:
mode a → mode B: switching the working mode of the electric energy storage unit into discharging by taking the constant current of the power supply input port of the rectification module as a control target, starting the inversion module to supply power to the alternating current power taking port, and starting the alternating current heavy load;
mode a → mode C: switching the working mode of the electric energy storage unit into discharging by taking the constant current of the power input port of the rectification module as a control target, and starting a direct-current heavy load;
mode a → mode D: switching the working mode of the electric energy storage unit into discharging, setting the working mode of the electric energy storage unit into off-grid, starting the inversion module to supply power to the alternating current power taking port, exiting the current conversion module, and exiting the rectification module;
mode B → mode a: the method comprises the following steps that with the constant current of a power supply input port of a rectification module as a control target, the working mode of an electric energy storage unit is switched to charge, an alternating current heavy load is stopped, and an inversion module stops supplying power to an alternating current power taking port;
mode B → mode C: the current of a power supply input port of the rectification module is constant to serve as a control target, the discharge power of the electric energy storage unit is increased step by step, a direct-current heavy load is started, an alternating-current heavy load is stopped, and the power supply power of the inversion module to the alternating-current power taking port is reduced step by step;
mode B → mode D: setting the working mode of the electric energy storage unit as off-grid, exiting the current conversion module and exiting the rectification module;
mode C → mode a: switching the working mode of the electric energy storage unit to charge by taking the constant input current of the power interface end of the rectifier module as a control target, and stopping the direct-current heavy load;
mode C → mode B: the current of a power input port of the rectification module is constant to serve as a control target, the power supply power of the inversion module to the alternating current power taking port is increased step by step, the alternating current heavy load is started, the direct current heavy load is stopped, and the discharge power of the electric energy storage unit is reduced step by step;
mode C → mode D: setting the working mode of the electric energy storage unit to be off-grid, starting the inversion module to supply power to the alternating current power taking port, exiting the current conversion module, and exiting the rectification module;
mode D → mode a: starting a rectification module, starting a current conversion module, quitting the inversion module, and setting the working mode of an electric energy storage unit to be grid-connected charging;
mode D → mode B: starting a rectification module, starting a current conversion module, and setting the working mode of the electric energy storage unit as grid-connected discharge;
mode D → mode C: starting a rectification module, starting a current conversion module, exiting from the inversion module, and setting the working mode of an electric energy storage unit to be grid-connected discharge; the instructions comprise binary instructions and continuous instructions, the binary instructions control the start and stop of each module in the electric energy conversion unit, and the continuous instructions are used for adjusting grid connection, grid disconnection, charging and discharging modes and operating power of the electric energy storage unit; the binary instructions are sequentially executed according to the switching process between the modes, and the decision basis of the continuous instructions is to keep the current of the power supply input port constant by adjusting the active power and the reactive power of the electric energy storage unit;
the continuous instruction basis is as follows:
Figure 78773DEST_PATH_IMAGE002
；
wherein
Figure DEST_PATH_IMAGE003
The method comprises active power and reactive power, which are called as follows for short: power and->
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For the power input of the rectifier module>
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Based on the power consumed by the AC load>
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Based on the power consumed by the DC load>
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For the power lost by the system>
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Power to be consumed for varying loads; when/is>
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The electrical energy storage unit is in a discharge mode when positive and in a charge mode when negative. />
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