CN114336710A - Distributed household electricity storage system and electricity utilization method - Google Patents
Distributed household electricity storage system and electricity utilization method Download PDFInfo
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- CN114336710A CN114336710A CN202111675231.9A CN202111675231A CN114336710A CN 114336710 A CN114336710 A CN 114336710A CN 202111675231 A CN202111675231 A CN 202111675231A CN 114336710 A CN114336710 A CN 114336710A
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Abstract
The invention relates to the field of household energy storage and power supply, in particular to a distributed household power storage system and a power utilization method; the distributed household electricity storage system comprises an acquisition module, a controller, a mains supply circuit, an energy storage unit power supply circuit and a plurality of energy storage units; each household appliance device and the energy storage units are respectively connected with a mains supply network, the mains supply network is used for supplying power to each household appliance device and charging and storing energy by each energy storage unit, and each household appliance device is respectively connected with each energy storage unit; the acquisition module is connected with the commercial power network and used for acquiring the electricity price information of the commercial power network and feeding the electricity price information back to the controller and each household appliance; each household appliance device selectively executes power supply of a mains supply network or power supply of an energy storage unit according to the price of electricity; the energy storage unit can store energy in the low-price period of electricity, the electric energy of the energy storage device is fully utilized for supplying power in the high-price period of electricity, the purpose of saving electricity charges is achieved, the economic benefit of a user is improved, and the power supply pressure in the peak period of electricity utilization is also reduced.
Description
Technical Field
The invention relates to the technical field of household energy storage and power supply, in particular to a distributed household electricity storage system and an electricity utilization method.
Background
At present, the household electrical appliance does not have an electricity storage module and is powered by a power grid all the time, the power grid makes peak-valley time-of-use electricity price according to the actual load change state, the current electricity price is divided into a plurality of time periods of 1 day and 24 hours, the time periods are respectively a valley period, a peak period and a flat period, and corresponding electricity prices are set according to different divided sections, so that the problems that electricity charges are high in the peak period of electricity consumption, cheap electricity cannot be stored in the peak period of electricity consumption, and cost saving and electricity price resource reasonable utilization are not facilitated are caused. Meanwhile, a large and uniform energy storage device is arranged in a household, potential safety hazards are brought to use due to the quality of the energy storage device and other problems, and if the battery is exploded due to heat dissipation; in addition, such a centralized energy storage device is also costly.
Therefore, in order to solve the above problems, there is a need for a distributed household power storage system and a power utilization method.
Disclosure of Invention
The invention mainly aims to provide a distributed household electricity storage system and an electricity utilization method, and aims to solve the problem of energy storage and power supply of household electrical appliance equipment.
In order to achieve the above object, the distributed household electricity storage system provided by the present invention comprises an acquisition module, a controller, a commercial power supply circuit, an energy storage unit power supply circuit and a plurality of energy storage units;
the commercial power supply circuit comprises a first power supply circuit and a second power supply circuit;
the mains supply network is connected with each household electrical appliance device through a first power supply circuit and used for supplying power to each household electrical appliance device;
the mains supply network is connected with each energy storage unit through a second power supply circuit and used for charging and storing energy of each energy storage unit;
each energy storage unit is connected with each household appliance through an energy storage unit power supply circuit and is used for supplying power to each household appliance;
the acquisition module is connected with the commercial power network and used for acquiring the electricity price information of the commercial power network and feeding the electricity price information back to the controller and each household appliance;
the acquisition module, the commercial power network and the energy storage units are respectively connected with the controller, and the controller is used for controlling power supply selection of each household appliance device and charging and discharging of the energy storage units.
Furthermore, the first power supply circuit comprises a plurality of first power supply switches, each household appliance device is connected with the mains supply network through the plurality of first power supply switches, the plurality of first power supply switches are connected with the controller respectively, and the controller controls the first power supply switches to be turned on and turned off.
Furthermore, the second power supply circuit comprises a plurality of charging switches, each energy storage unit is connected with the mains supply network through the plurality of charging switches, the plurality of charging switches are connected with the controller respectively, and the controller controls the charging switches to be turned on and off.
Furthermore, the energy storage unit power supply circuit comprises a plurality of second power supply switches, each energy storage unit is connected with each household appliance through the plurality of second power supply switches, the plurality of second power supply switches are connected with the controller, and the controller controls the second power supply switches to be turned on and off.
Further, a plurality of pieces of first power supply switches of the first power supply circuit are arranged in parallel; a plurality of charging switches of the second power supply circuit are arranged in parallel; and a plurality of second power supply switches of the energy storage unit power supply circuit are arranged in parallel.
Furthermore, the acquisition module is a broadcasting module, and the broadcasting module is in communication connection with the commercial power network and is used for acquiring the peak-valley electricity price information of the commercial power network and feeding the electricity price information back to the controller and each household appliance.
Further, the household appliances include electric lamps, air conditioners, water heaters, computers, refrigerators, televisions, air purifiers, washing machines, dish washers, disinfection cabinets, dryers, and floor sweeping robots.
The invention also provides a power utilization method of the distributed household power storage system, which comprises the following steps:
acquiring the electricity price information of the commercial power network through an acquisition module;
and each household appliance device and the energy storage unit control the controller to execute corresponding charging and discharging operations according to the electricity price information.
Further, each household appliance and each energy storage unit control the controller to execute corresponding charging and discharging operations according to the electricity price information; the method specifically comprises the following steps:
when the electricity price of the commercial power network is less than or equal to the commercial power flat price X, each household electrical appliance equipment control controller closes the first power supply switch, disconnects the second power supply switch and selects the commercial power network to supply power;
each energy storage unit controls the controller to close the charging switch, and the commercial power network is selected to charge and store energy;
when the commercial power network is higher than the commercial power flat price X, each household electrical appliance equipment control controller disconnects the first power supply switch, closes the second power supply switch and selects the energy storage unit to supply power;
and each energy storage unit controls the controller to disconnect the charging switch, so that the charging and energy storage of the commercial power network are not performed.
The commercial power flat price X is the electricity price of the commercial power network in the flat section, meanwhile, the commercial power flat price X can be manually set, and the value of X is positive.
Further, each energy storage unit still includes the electric quantity detection step before charging and discharging, specifically includes:
setting a first electric quantity threshold upper limit of the energy storage unit, when the fact that the electric quantity of the energy storage unit is higher than the first electric quantity threshold is detected, the energy storage unit is in a full-charge state, charging and energy storage are not needed, the electricity price information is lower than the commercial power flat price X, and a charging switch corresponding to the energy storage unit cannot be closed;
and setting a lower limit of a second electric quantity threshold of the energy storage unit, when the electric quantity of the energy storage unit is detected to be lower than the second electric quantity threshold, indicating that the energy storage unit is in an 'empty electric quantity' state, no discharging power supply is needed, the electric price information is higher than the commercial power flat price X, a second power supply switch corresponding to the energy storage unit cannot be closed, and each household appliance equipment control controller closes a first power supply switch to be supplied with power by a commercial power network.
Advantageous effects
In the technical scheme, the peak-valley electricity price information issued by the commercial power network is acquired in real time through the acquisition module, and the electricity price information is issued to each household appliance device and the energy storage unit, and each household appliance device selectively executes power supply of the commercial power network or power supply of the energy storage unit according to the electricity price; the energy storage unit stores energy at the valley of the electricity price without a complex regulation strategy, and the electric energy of the energy storage device is fully utilized for supplying power at the peak of the electricity price; the purpose of saving the electric charge is achieved, the economic benefit of the user is improved, and the power supply pressure at the peak stage of the electricity utilization is also reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural view of a distributed household electricity storage system of the present invention;
fig. 2 is a flowchart of a power consumption method of the distributed household power storage system of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1, the distributed household power storage system of the present invention includes an obtaining module, a controller, a commercial power supply circuit, an energy storage unit power supply circuit, and a plurality of energy storage units;
the commercial power supply circuit comprises a first power supply circuit and a second power supply circuit;
the mains supply network is connected with each household electrical appliance device through a first power supply circuit and used for supplying power to each household electrical appliance device;
the mains supply network is connected with each energy storage unit through a second power supply circuit and used for charging and storing energy of each energy storage unit;
each energy storage unit is connected with each household appliance through an energy storage unit power supply circuit and is used for supplying power to each household appliance;
the acquisition module is connected with the commercial power network and used for acquiring the electricity price information of the commercial power network and feeding the electricity price information back to the controller and each household appliance;
the acquisition module, the commercial power network and the energy storage units are respectively connected with the controller, and the controller is used for controlling power supply selection of each household appliance device and charging and discharging of the energy storage units.
The first power supply circuit comprises a plurality of first power supply switches, each household appliance device is connected with the mains supply network through the plurality of first power supply switches, the plurality of first power supply switches are connected with the controller, and the controller controls the first power supply switches to be turned on and turned off.
The second power supply circuit comprises a plurality of charging switches, each energy storage unit is connected with the commercial power network through the plurality of charging switches, the plurality of charging switches are connected with the controller respectively, and the controller controls the charging switches to be turned on and off.
The energy storage unit power supply circuit comprises a plurality of second power supply switches, each energy storage unit is connected with each household appliance through the plurality of second power supply switches, the plurality of second power supply switches are connected with the controller respectively, and the controller controls the second power supply switches to be turned on and off.
Preferably, a plurality of pieces of the first power supply switches of the first power supply circuit are arranged in parallel; a plurality of charging switches of the second power supply circuit are arranged in parallel; and a plurality of second power supply switches of the energy storage unit power supply circuit are arranged in parallel. The power supply switch and the charging switch which are arranged in parallel are used for independent use of each household appliance and independent charging and discharging of each energy storage unit.
The acquisition module is a broadcasting module which is the existing equipment purchased in the market; the broadcasting module is in communication connection with the commercial power network and used for acquiring peak and trough electricity price information of the commercial power network and feeding the electricity price information back to the controller and each household appliance through the wireless network. The household electrical appliances comprise electric lamps, air conditioners, water heaters, computers, refrigerators, televisions, air purifiers, washing machines, dish washers, disinfection cabinets, dryers, floor sweeping robots and the like.
Referring to fig. 2, the present invention further provides a power utilization method of a distributed household power storage system, including the above-mentioned distributed household power storage system, including the following steps:
acquiring the electricity price information of the commercial power network through an acquisition module;
and each household appliance device and the energy storage unit control the controller to execute corresponding charging and discharging operations according to the electricity price information.
Further, each household appliance and each energy storage unit control the controller to execute corresponding charging and discharging operations according to the electricity price information; the method specifically comprises the following steps:
when the electricity price of the commercial power network is less than or equal to the commercial power flat price X, each household electrical appliance equipment control controller closes the first power supply switch, disconnects the second power supply switch and selects the commercial power network to supply power;
each energy storage unit controls the controller to close the charging switch, and the commercial power network is selected to charge and store energy;
when the commercial power network is higher than the commercial power flat price X, each household electrical appliance equipment control controller disconnects the first power supply switch, closes the second power supply switch and selects the energy storage unit to supply power;
and each energy storage unit controls the controller to disconnect the charging switch, so that the charging and energy storage of the commercial power network are not performed.
As an implementation manner, before charging and discharging, each energy storage unit further includes an electric quantity detection step, specifically including:
setting a first electric quantity threshold upper limit of the energy storage unit, when the fact that the electric quantity of the energy storage unit is higher than the first electric quantity threshold is detected, the energy storage unit is in a full-charge state, charging and energy storage are not needed, the electricity price information is lower than (including being equal to) the commercial power flat price X, and a charging switch corresponding to the energy storage unit cannot be closed;
and setting a lower limit of a second electric quantity threshold of the energy storage unit, when the electric quantity of the energy storage unit is detected to be lower than the second electric quantity threshold, indicating that the energy storage unit is in an 'empty electric quantity' state, no discharging power supply is needed, the electric price information is higher than the commercial power flat price X, a second power supply switch corresponding to the energy storage unit cannot be closed, and each household appliance equipment control controller closes a first power supply switch to be supplied with power by a commercial power network.
It should be noted that the utility power flat price X is the electricity price of the utility power network in the flat section, and the utility power flat price X can be manually set, and the value of X is a positive number.
According to the technical scheme, the information of the peak and trough electricity prices issued by the commercial power network is acquired in real time through the acquisition module, and the electricity price information is issued to each household appliance device and the energy storage unit, and each household appliance device selectively executes commercial power network power supply or energy storage unit power supply according to the electricity price; the energy storage unit stores energy at the valley of the electricity price without a complex regulation strategy, and the electric energy of the energy storage device is fully utilized for supplying power at the peak of the electricity price; the purpose of saving the electric charge is achieved, the economic benefit of the user is improved, and the power supply pressure at the peak stage of the electricity utilization is also reduced.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A distributed household electricity storage system is characterized by comprising an acquisition module, a controller, a mains supply circuit, an energy storage unit power supply circuit and a plurality of energy storage units;
the commercial power supply circuit comprises a first power supply circuit and a second power supply circuit;
the mains supply network is connected with each household electrical appliance device through a first power supply circuit and used for supplying power to each household electrical appliance device;
the mains supply network is connected with each energy storage unit through a second power supply circuit and used for charging and storing energy of each energy storage unit;
each energy storage unit is connected with each household appliance through an energy storage unit power supply circuit and is used for supplying power to each household appliance;
the acquisition module is connected with the commercial power network and used for acquiring the electricity price information of the commercial power network and feeding the electricity price information back to the controller and each household appliance;
the acquisition module, the commercial power network and the energy storage units are respectively connected with the controller, and the controller is used for controlling power supply selection of each household appliance device and charging and discharging of the energy storage units.
2. The distributed household electricity storage system as claimed in claim 2, wherein the first power supply circuit comprises a plurality of first power supply switches, each of the household electrical appliances is connected to the utility power network through the plurality of first power supply switches, and the plurality of first power supply switches are connected to the controller, respectively, and the controller controls the first power supply switches to be turned on and off.
3. The distributed household electrical storage system of claim 2, wherein the second power supply circuit comprises a plurality of charging switches, each of the energy storage units is connected to the utility power network through a respective plurality of charging switches, and the plurality of charging switches are respectively connected to the controller, and the controller controls the charging switches to be turned on and off.
4. The distributed household electricity storage system according to claim 3, wherein the energy storage unit power supply circuit comprises a plurality of second power supply switches, each energy storage unit is connected to each household electrical appliance through the plurality of second power supply switches, and the plurality of second power supply switches are connected to the controller, and the controller controls the second power supply switches to be turned on and off.
5. The distributed household electricity storage system according to claim 4, wherein a plurality of pieces of the first power supply switches of the first power supply circuit are arranged in parallel; a plurality of charging switches of the second power supply circuit are arranged in parallel; and a plurality of second power supply switches of the energy storage unit power supply circuit are arranged in parallel.
6. The distributed household electricity storage system according to any one of claims 1 to 5, wherein the obtaining module is a broadcasting module, the broadcasting module is connected to the mains network in communication, and is configured to obtain peak-valley electricity price information of the mains network, and the electricity price information is fed back to the controller and each household electrical appliance.
7. The distributed household electricity storage system of claim 6, wherein the household electrical appliances comprise electric lights, air conditioners, water heaters, computers, refrigerators, televisions, air purifiers, washing machines, dishwashers, disinfection cabinets, dryers, and sweeping robots.
8. A method of using electricity of a distributed household electricity storage system comprising the distributed household electricity storage system of any one of claims 1 to 7, characterized by comprising the steps of:
acquiring the electricity price information of the commercial power network through an acquisition module;
and each household appliance device and the energy storage unit control the controller to execute corresponding charging and discharging operations according to the electricity price information.
9. The electricity utilization method of the distributed household electricity storage system according to claim 8, wherein the respective household electrical appliances and the energy storage unit control the controller to perform corresponding charge and discharge operations according to the electricity rate information; the method specifically comprises the following steps:
when the electricity price of the commercial power network is less than or equal to the commercial power flat price X, each household electrical appliance equipment control controller closes the first power supply switch, disconnects the second power supply switch and selects the commercial power network to supply power;
each energy storage unit controls the controller to close the charging switch, and the commercial power network is selected to charge and store energy;
when the commercial power network is higher than the commercial power flat price X, each household electrical appliance equipment control controller disconnects the first power supply switch, closes the second power supply switch and selects the energy storage unit to supply power;
and each energy storage unit controls the controller to disconnect the charging switch, so that the charging and energy storage of the commercial power network are not performed.
10. The power utilization method of the distributed household power storage system according to claim 9, wherein before charging and discharging, each energy storage unit further comprises a power detection step, specifically comprising:
setting a first electric quantity threshold upper limit of the energy storage unit, when the fact that the electric quantity of the energy storage unit is higher than the first electric quantity threshold is detected, the energy storage unit is in a full-charge state, charging and energy storage are not needed, the electricity price information is lower than the commercial power flat price X, and a charging switch corresponding to the energy storage unit cannot be closed;
and setting a lower limit of a second electric quantity threshold of the energy storage unit, when the electric quantity of the energy storage unit is detected to be lower than the second electric quantity threshold, indicating that the energy storage unit is in an 'empty electric quantity' state, no discharging power supply is needed, the electric price information is higher than the commercial power flat price X, a second power supply switch corresponding to the energy storage unit cannot be closed, and each household appliance equipment control controller closes a first power supply switch to be supplied with power by a commercial power network.
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| CN110932295A (en) * | 2019-11-28 | 2020-03-27 | 星络智能科技有限公司 | Household power storage management system |
| CN111697565A (en) * | 2020-05-18 | 2020-09-22 | 华北电力大学 | Energy scheduling method and system for household energy management system |
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2021
- 2021-12-31 CN CN202111675231.9A patent/CN114336710A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103138369A (en) * | 2011-11-30 | 2013-06-05 | 西安嘉乐世纪机电科技有限公司 | Household electricity storage-and-use system with timing control |
| CN107612010A (en) * | 2017-10-12 | 2018-01-19 | 太仓市同维电子有限公司 | A kind of energy storage of avoiding the peak hour reduces the method and system of the electricity charge |
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