CN110298715B - Energy transaction system and method based on distributed energy storage - Google Patents
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Abstract
The invention discloses an energy trading system and method based on distributed energy storage, comprising a user terminal, an energy storage device and an energy trading platform, wherein the user terminal receives set data; the energy storage device receives set data of the user terminal or a control signal sent by the energy trading platform to determine the working state of the energy storage device, and the energy trading platform receives real-time electric power trading data and the set data from the user terminal to generate the control signal. The energy trading system and the energy trading method realize energy interaction between the energy storage device and the power grid through effective control, inhibit power utilization fluctuation in the regional power grid, realize maximization of multi-party benefits, realize sharing and sharing of the energy storage system in a large range, improve operation stability of the power grid and effectively reduce energy cost of users.
Description
Technical Field
The invention relates to an energy trading system and an energy trading method, in particular to an energy trading system and an energy trading method based on distributed energy storage of a network and a software system, which realize the optimized utilization of stored energy.
Background
The development and utilization of clean energy, especially the application of renewable energy represented by wind energy and solar energy, have become important measures for dealing with climate change, environmental protection and realizing sustainable development in countries in the world. When large-scale renewable energy sources (wind power and photovoltaic) generate electricity, the generated energy in the power grid has fluctuation due to the inherent intermittency. Meanwhile, the load in the power grid also has fluctuation. Typically, 7:00 to 23:00 are periods of high daily electricity usage, as everyone is active (working, producing, learning, entertaining). In this time period, there are three other small time periods with the most power consumption, such as about 10:00 a.m., about 16:00 a.m., and about 20:00 a.m., which are called peak loads. At night, especially late night, the electricity consumption is greatly reduced. In a traditional electric power system, electric energy does not have a storage link, and the generated energy and the power consumption need to be kept balanced all the time. From the viewpoint of stable operation of the system, it is desirable that the load be smooth. Therefore, in some regions and countries, in order to encourage the wrong time power usage, the power rates at different time periods are different, and at the time of peak load, the power rates are higher, and at the time of small load, the power rates are lower. As previously mentioned, the inherent random intermittency of renewable energy sources presents a significant challenge to the stable operation of existing power systems. In order to overcome the intermittent defect of new energy power generation, the energy storage technology has become an important supporting technology.
The construction of large-scale energy storage devices requires a large amount of construction land and capital investment, and is difficult to implement. In real life, however, there are a large number of miniaturized energy storage devices distributed in different places, such as electric vehicles, electric bicycles, household energy storage modules (power walls), and the like. However, a common user cannot easily realize the transaction between the energy of the energy storage system and other users or a power grid, and cannot easily obtain price information, realize the energy transaction and obtain benefits.
Patent document 1 (chinese patent publication No. CN 106300343A) discloses a distributed energy optimization method for a microgrid, in which a homemade bidding strategy is designed based on characteristics of each resource (such as renewable energy, translatable load, energy storage, etc.) in the microgrid, and accordingly, energy management and optimization of the microgrid are performed. The method is essentially an energy optimization management strategy based on the requirement of maintaining stable operation of the system, the charging and discharging of the stored energy is based on the energy management requirement of the microgrid, and the expected capacity of the energy storage device of the microgrid after the optimization period is finished must be considered for management on the premise of meeting the complete consumption of new energy.
Patent document 2 (chinese patent publication No. CN 105207267A) discloses a microgrid energy management system, which analyzes current data and historical data of a distributed power supply, an energy storage unit, a load, and a power grid, then scientifically evaluates and predicts their operating states, selects different energy management strategies according to different operating modes of the microgrid by using the current data and the predicted data as reference inputs of an energy management model, comprehensively considers the predicted power generation amount of the distributed power supply, the predicted residual capacity of the energy storage unit, the power grid electricity price information, and the predicted local load demand, solves an optimal operating plan of the microgrid in a period of time in the future by using an effective algorithm, and evaluates the operating economy of the microgrid. The energy management system essentially belongs to the energy management category in the microgrid and is a typical layered microgrid energy management system. And an energy storage link is involved, the energy management system is based on maintaining reliable and optimized operation of the microgrid, and based on a set energy management objective function, whether the energy storage link needs to be discharged or charged is determined, so that the maximum benefit is realized. Therefore, the decision of whether to charge or discharge the energy storage unit depends not only on the electricity price itself, but also on the current operating state of the microgrid and the energy management strategy.
Disclosure of Invention
The invention aims to provide a transaction system and a transaction method based on distributed energy storage, which aim to solve the problems in the prior art, realize interaction between energy in an energy storage system and other demand parties or a power grid based on the self intention and setting of a user, share and share the energy in a large range, improve the operation stability of the power grid and effectively reduce the energy cost of the user.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: an energy trading system based on distributed energy storage comprises a user terminal, an energy storage device and an energy trading platform, wherein:
the user terminal is terminal equipment with a network communication function and is used for receiving set data and receiving an execution result fed back by the energy storage device and/or an execution result fed back by the energy trading platform;
the energy storage device is used for receiving set data from the user terminal or a control signal sent by the energy trading platform to determine the working state of the energy storage device and feeding back an execution result to the energy trading platform and/or the user terminal; the working state comprises charging, discharging or standby;
and the energy trading platform is used for receiving the real-time electric power trading data and the setting data from the user terminal to generate the control signal, receiving and storing the execution result fed back by the energy storage device, and feeding back the execution result to the user terminal.
Further, the setting data includes an operation mode of the energy storage device, the operation mode includes a networking mode, and the networking mode is: the energy storage device is controlled by the energy trading platform.
Further, the working mode further includes a leasing mode, and the leasing mode is as follows: the user transfers the control and the use authority of the energy storage device to a third party and receives the income.
Further, the working modes further include a single mode, and the single mode is: the energy storage device is only controlled by the user terminal and is not controlled by the energy transaction platform.
Further, the setting data of the user further includes working parameters in a networking mode and a leasing mode, wherein:
the operating parameters in the networking mode include: position information, capacity, discharge price, charge price of the energy storage device; the operating parameters in the rental mode include: the time period of the rental mode and the expected revenue.
Further, the setting data further includes working parameters in a single machine mode, including: energy storage device discharge price, charge price, dischargeable capacity, charge capacity.
Furthermore, the energy storage device comprises an energy storage element, an electric energy conversion unit and a management unit, the management unit comprises a control unit and a communication interface, the control unit receives the set data or the control signal sent by the energy trading platform through the communication interface, controls the electric energy conversion unit and the energy storage element to execute corresponding working states, and feeds back an execution result to the energy trading platform and/or the user terminal.
Furthermore, the energy storage device further comprises an electric quantity metering unit for collecting electric quantity data of discharging or charging of the energy storage device.
Further, the energy trading platform comprises a server, the server is provided with an information management unit and an energy trading unit, and the information management unit is used for receiving the electric power trading data and the setting data from the user terminal and classifying the energy storage devices; and the energy transaction unit screens out the energy storage devices meeting the conditions based on the electric power transaction data and the set data of the user terminal, sorts the energy storage devices and generates the control signal.
Further, the information management unit is further configured to receive registration information sent by the user terminal, and generate an identification code uniquely corresponding to the registered energy storage device.
Further, the classification includes location information, operation mode, charge/discharge price, or capacity of the energy storage device.
Further, the sorting criterion includes charge/discharge price, capacity or product value of price and capacity of the energy storage device.
Further, the energy trading platform comprises an electricity price prediction module, provides prediction information comprising electricity consumption, electricity generation and electricity price, and feeds the prediction information back to the user terminal.
Further, the user terminal includes at least one of a first user terminal independent of the energy storage device and a second user terminal integrated with the energy storage device.
The invention also provides an energy trading method based on distributed energy storage, which comprises the following steps:
step 1, a user terminal receives set data, wherein the set data comprise working modes of an energy storage device and working parameters in all the modes, and the user terminal sends the set data to an energy trading platform and the energy storage device; the working mode comprises a single machine mode, a networking mode or a renting mode, and if the working mode set by the user is the single machine mode, the step 2 is executed; if the working mode set by the user is the networking mode, executing the step 3-5; if the working mode set by the user is a renting mode, executing the step 6-8;
step 2, the energy storage device determines the working state of the energy storage device according to the working parameters in the single machine mode, and feeds back the execution result to the user terminal, wherein the working state comprises charging, discharging or standby;
step 3, the energy trading platform generates a control signal according to the real-time electric power trading data and the working parameters in the networking mode;
step 4, the energy storage device determines the working state of the energy storage device according to the control signal, and feeds back an execution result to the energy trading platform/the energy trading platform and the user terminal, wherein the working state comprises charging, discharging or standby;
step 5, the energy trading platform receives and stores the execution result fed back by the energy storage device, and feeds back the execution result to the user terminal;
step 6, the energy trading platform generates a control signal according to the real-time electric power trading data and the set data from the third party;
step 7, the energy storage device determines the working state of the energy storage device according to the control signal and feeds an execution result back to the energy trading platform/the energy trading platform and the user terminal, wherein the working state comprises charging, discharging or standby;
and 8, the energy trading platform receives and stores the execution result fed back by the energy storage device, and feeds back the execution result to the user terminal.
Further, the step 3 and the step 6 further include classifying the energy storage devices, screening out the energy storage devices meeting the conditions, sorting the energy storage devices, and generating the control signal; the classification basis comprises position information, a working mode, charge and discharge prices and capacity; the sequencing basis comprises charge and discharge price, capacity, and the product value of the price and the capacity.
The invention has the beneficial effects that: the invention provides a convenient and novel energy transaction platform, which is based on a distributed energy storage device, integrates the energy storage device into a large-capacity energy storage system by utilizing a corresponding network control technology, fully based on the self intention and setting of a user, solves the interaction between the energy of the energy storage system of the user and other demand parties or a power grid through effective control, inhibits the power utilization fluctuation in a regional power grid, realizes the maximization of multi-party benefits, realizes the sharing and sharing of the energy storage system in a large range, improves the operation stability of the power grid and effectively reduces the energy cost of the user.
Drawings
Fig. 1 is a block diagram of an application scenario of a distributed energy storage-based energy transaction system according to an embodiment of the present invention.
Fig. 2 is a block diagram of an energy storage device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a block diagram illustrating an application scenario of a distributed energy storage based energy transaction system according to an embodiment of the present invention. The system comprises various loads, new energy power generation devices (such as wind power and photovoltaic), a public power grid (power grid), a user terminal, various energy storage devices and an energy trading platform, wherein: the user terminal is terminal equipment with a network communication function and is used for receiving set data and receiving an execution result fed back by the energy storage device and/or an execution result fed back by the energy trading platform; the energy storage device is used for receiving set data from the user terminal or a control signal sent by the energy trading platform to determine the working state of the energy storage device and feeding back an execution result to the energy trading platform and/or the user terminal; the working state comprises charging, discharging or standby; and the energy trading platform is used for receiving the real-time electric power trading data and the setting data from the user terminal to generate the control signal, receiving and storing the execution result fed back by the energy storage device, and feeding back the execution result to the user terminal.
The user terminal, the energy trading platform and the energy storage device are subjected to information interaction through communication links, the information interaction is carried out on the basis of the Internet, the mode of accessing the Internet can be wired, wireless or power line carrier waves and the like, and the essence of the invention is not influenced by the form of the communication links.
The user terminal is terminal equipment with a network communication function and is used for receiving the setting data of the energy storage device and the execution result fed back by the energy storage device; the user terminal can be a mobile phone, a PDA, a computer, special equipment and other special equipment, is provided with a corresponding software user interface, can be mutually independent from the energy storage device, and can also be integrated on the energy storage device. In different modes, the parameters or data for setting the energy storage device may be a user or a third party. The user terminal can manage 1 or more energy storage devices and receive the setting data. The setting data comprises setting data of a user, and the setting data of the user comprises working modes of the energy storage device and working parameters under the working modes. The working modes comprise:
1) a single machine mode:
in the mode, the control of the user terminal is only accepted, and the control of the energy storage device by the energy transaction platform is not accepted. The operating parameters in this mode include (but are not limited to): the energy storage device is used for storing the energy of the electric energy, and the energy storage device is used for discharging the electric energy externally, charging the electric energy, discharging the electric energy, charging the electric energy, allowing the time interval of charging and discharging, protecting the lower limit of the battery capacity during discharging and the like.
2) Networking mode:
and receiving an instruction of the energy trading platform based on the working parameters in the mode, and carrying out corresponding operation. Parameters in the networking mode of operation include (but are not limited to):
location information of the energy storage device (which may be input by a user terminal or automatically obtained by a global positioning system within the energy storage device);
the capacity of the energy storage device;
the upper and lower limits of charging and discharging of the energy storage device;
the energy storage device can be used for receiving system control time periods, including time periods available for selling electricity or charging;
the price of electricity sold by the energy storage device can be set to be the lowest price of electricity sold, or electricity can be sold according to the market price in the allowed time period, or electricity can be sold according to the multiple of the current electricity price;
the price of the energy storage device can be set to the highest price allowed to be charged, or the energy storage device can be charged according to the market price in an allowed time period, or the energy storage device can be charged according to the multiple of the current electricity price.
3) A leasing mode:
when the energy storage device is set to the rental mode, the user transfers the control and the right of use of the energy storage device to a third party and receives a profit. In the user terminal, the time period of the rental mode of the energy storage device, that is, in which time period, the energy storage device operates in the rental mode, and the expected profit may be a fixed value agreed by both parties, a ratio, a numerical value agreed by other both parties, or the like. In the renting mode, the setting data further comprises the setting data of a third party, namely the third party can set the energy storage device through the user terminal, and the setting data comprises the capacity of the energy storage device, the charging and discharging limits of the energy storage device, the time period within which the energy storage device can be controlled by the system, the electricity selling price of the energy storage device, the charging price of the energy storage device and the like.
The user can select which working mode the energy storage device is in according to the self condition.
All the energy storage devices are divided according to regions and can be electric vehicles, electric bicycles or household energy storage devices, and the like, the user terminal sends registration information to the energy trading platform to become a registered user, and the registered user has a unique identification code, such as a unique account number and a unique login password. The operating state includes charging, discharging or standby.
Fig. 2 is a block diagram of an energy storage device according to an embodiment of the invention. The energy storage device comprises an energy storage element, a converter (electric energy conversion unit) and a management unit, wherein in an alternating current power grid, the converter is usually an alternating current-direct current converter (AC-DC); in a DC grid, the converter may be a direct current-to-direct current converter (DC-DC). The management unit may be a separate hardware module or may be integrated with other modules, such as with the converter. The management unit comprises a control unit and a communication interface.
In the stand-alone working mode, the communication interface receives the set data of the user terminal to the energy storage system in a communication mode (a wired mode or a wireless mode) and transmits the set data to the control unit so as to determine the working state of the energy storage device, such as charging, discharging or standby, and feeds back the execution result to the user terminal.
Under the networking and leasing working mode, the communication interface circuit receives a control signal of the energy trading platform through the communication link and transmits the received control signal to the control unit so as to determine the working state of the energy storage device, such as charging, discharging or standby, and feeds an execution result back to the energy trading platform and the user terminal.
The energy storage device receives the settings of the user terminal, including but not limited to: the electricity price of the energy storage system discharging to the outside (namely selling electricity), the upper limit of the electricity price of the energy storage system charging, the dischargeable capacity, the allowable discharging time period, the lower limit of the battery capacity protection during discharging and the like. The electricity price discharged to the outside is the expected electricity selling price of the energy storage system, the upper limit of the electricity price charged is the upper limit of the price for supplementing and charging the energy storage system, and when the electricity price is less than the upper limit, the energy storage system can be charged. In some applications, the energy storage system is charged by new energy, and this parameter may not be set. The dischargeable capacity is a dischargeable capacity published to the system by the energy storage system based on the capacity condition of the energy storage system, such as the current SOC (State of Charge) of the battery of the energy storage element. The discharge period is a period during which the energy storage system allows external control of charging and discharging while ensuring its own functions. In an embodiment, the management unit of the energy storage device may further include a human-machine interface, and the human-machine interface is used as a user terminal, that is, the user terminal and the energy storage device are integrated into a whole, and may accept the above setting of the energy storage system by the user. The independent user terminal can also manage the energy storage device with the human-computer interface, so that the energy storage device can simultaneously receive the setting of the user terminal and the human-computer interface, feedback information and the like.
The energy storage device also comprises a metering module, which may be a separate component, such as a smart meter already installed at the user, or a metering module integrated with other components, such as a smart meter integrated with the management unit of the energy storage device or with the converter. The electric quantity metering module is used for collecting electric quantity data of the electric network discharged or charged by the energy storage device. In some occasions, the electric quantity data collected by the electric quantity metering module also contains electric quantity information of other power generation or electric equipment, but the information is not influenced to contain the electric quantity information of interaction between the energy storage device and the power grid. When the control signal of the energy trading platform is executed, the electric quantity metering module feeds back the electric quantity information of the corresponding time period to the user terminal and the energy trading platform. If the energy storage device executes the discharge control signal of the energy trading platform, the electric quantity data collected by the electric quantity metering module in the discharge time interval is transmitted to the energy trading platform and the user terminal for later trading settlement.
An energy trading platform (also called an energy trading control center) is the core of the whole system. The energy trading platform comprises a server, the server is provided with an information management unit and an energy trading unit, the server can be a distributed server system based on the modern internet technology or a distributed virtual server system based on cloud computing, and the server can be communicated with an energy storage device (integrated with a human-computer interface as a user terminal) and the user terminal. The information management unit is used for receiving real-time electric power transaction data, the electric power transaction data comprise data such as real-time electricity price, electricity demand, current electricity consumption and current generated energy, can be divided according to different regions, meanwhile, the information management unit also receives set data of each energy storage device, classifies each energy storage device, and can classify according to position information, working modes, charge and discharge prices, capacity and the like of the energy storage devices. The energy trading unit screens out the energy storage devices meeting the conditions in the same region based on real-time electric power trading data and set data in the region, then sorts the energy storage devices according to charging and discharging prices, capacity, product values of the prices and the capacity and the like, generates control signals and transmits the control signals to the control unit in the energy storage devices to control the corresponding energy storage devices.
The energy trading platform also receives and stores the execution result fed back by the energy storage device, including trading time, price, electric quantity information collected by the electric quantity metering module and the like, and is used for later energy trading settlement, and meanwhile, the execution result is fed back to the user terminal.
The energy trading platform can also comprise an electricity price prediction module, and the energy trading platform provides prediction of electricity consumption, electricity generation and electricity price based on available real-time data and past data, including weather prediction, past weather data, past (historical) electricity load curve, electricity generation curve and the like, and provides reference for parameter setting of the energy storage device, such as setting of working mode and working parameters of the energy storage device. The energy trading platform can feed back the relevant prediction information to the user terminal through the communication link.
In one embodiment, when the energy storage device works in a networking mode and is set to be in a discharging mode, the energy trading system screens out energy storage devices meeting conditions based on real-time power supply requirements and real-time electricity prices of electricity utilization units in the system in the same power supply area, then carries out sequencing according to a sequencing method such as a discharging price or a discharging capacity, a product value of the price and the capacity and the like, generates a control signal to control the corresponding energy storage devices to discharge, feeds execution results such as trading time, price and discharging electricity quantity information collected by the electricity quantity metering module back to the energy trading platform, and can also feed the execution results back to the user terminal at the same time, and the energy trading platform receives and stores the execution results fed back by the energy storage devices and feeds the execution results back to the user terminal. Specifically, the set discharge price and the dischargeable capacity of a plurality of energy storage devices are not exactly the same, and the product of the set discharge price and the dischargeable capacity can be used as an indication signal for obtaining the maximum benefit. And the energy trading platform controls the energy storage system with a higher product value to discharge when the real-time electricity price is higher than the required discharge electricity price according to the real-time electricity price and the required discharge electricity price of each energy storage device.
When the energy storage device is set to be in a charging mode, the energy transaction system screens out the energy storage devices meeting conditions in the same power supply area based on the real-time power supply requirement and the real-time electricity price of the electricity consumption unit in the system, then the energy storage devices are sequenced according to the information such as the charging price and the capacity, control signals are generated to control the corresponding energy storage devices to be charged, the energy storage devices feed execution results such as transaction time, the price and the charging electric quantity information collected by the electric quantity metering module back to the energy transaction platform, and also can feed the execution results back to the user terminal, and the energy transaction platform receives and stores the execution results fed back by the energy storage devices and feeds the execution results back to the user terminal.
In another embodiment, the energy storage device operates in a rental mode, and control and usage rights of the energy storage device are fully granted to third parties. The third party may be a power selling company, a power generation plant, a power grid, a financial arbitrage trader, etc. The third party controls the energy storage system in the renting mode with the control right based on the target or the requirement of the third party.
In one embodiment, the third party may be a financial arbitrage trader, and in the energy trading system, the control authority of the corresponding energy storage device is obtained based on the corresponding rental price, and can be regarded as the own energy storage device, through user terminal, making corresponding system setting (setting data), such as communication link, making corresponding configuration including the charge and discharge price of energy storage device, the charge and discharge upper and lower limits of energy storage device, etc., the energy trading platform generates control signal according to the real-time electric power trading data and the above-mentioned setting data from third party, the energy storage device determines its working state according to the control signal, and the energy trading platform receives and stores the execution result fed back by the energy storage device and feeds the execution result back to the user terminal. And the third party controls the energy storage device in the renting mode to trade on the energy storage trading platform, obtain the price difference and make a profit.
In one embodiment, the third party may be a power grid. The energy storage device obtained by the power grid in the renting mode can be used as an energy storage system equipped by the power grid. The power grid can carry out charging and discharging control on the energy storage system in real time through an energy trading platform based on the prediction of electricity consumption, generated energy and electricity price. In one situation, when the electric load is predicted to rise and the electric energy production is insufficient or the electricity price is predicted to rise, the energy storage system is controlled to discharge electricity through the energy trading platform so as to suppress the electricity price fluctuation. In one situation, the power grid can also perform charging and discharging management on the energy storage system through the energy trading platform according to the real-time electricity price, for example, when the electricity price rises to an internal control threshold, the energy storage system is discharged; when the electricity price drops to an internal control threshold, the stored energy is charged from the system, thereby making additional gains. In another situation, the power grid can also control the energy storage system through the energy trading platform based on the system requirements of the power supply network, so as to meet the requirements of system operation, for example, under the condition that the power grid needs reactive power regulation, frequency regulation or black start (such as a restart process after power failure), the energy storage system is controlled to externally provide or absorb electric energy meeting the requirements, and the normal over-operation requirements of the system are met.
The invention discloses an energy trading method based on distributed energy storage, which is applied to an energy trading system based on distributed energy storage and comprises the following steps:
s1, the user terminal receives setting data, the setting data comprise working modes of the energy storage device and working parameters of the energy storage device in each mode, and the user terminal sends the setting data to the energy trading platform and the energy storage device; the working mode comprises a stand-alone mode, a networking mode or a renting mode, and if the working mode set by the user is the stand-alone mode, the step S2 is executed; if the working mode set by the user is the networking mode, executing the steps S3-S5; if the operation mode set by the user is the rental mode, executing the steps S6-S8;
s2, the energy storage device determines the working state according to the working parameters in the single machine mode, and feeds back the execution result to the user terminal, wherein the working state comprises charging, discharging or standby;
s3, the energy trading platform generates a control signal according to the real-time electric power trading data and the working parameters in the networking mode;
s4, the energy storage device determines the working state according to the control signal, and feeds back the execution result to the energy trading platform, and also feeds back the execution result to the user terminal, wherein the working state comprises charging, discharging or standby;
s5, the energy trading platform receives and stores the execution result fed back by the energy storage device, and feeds back the execution result to the user terminal;
s6, the energy trading platform generates a control signal according to the real-time electric power trading data and the set data from the third party;
and S7, the energy storage device determines the working state of the energy storage device according to the set data or the control signal, and feeds back the execution result to the energy trading platform, and also can feed back the execution result to the user terminal, wherein the working state comprises charging, discharging or standby.
And S8, the energy trading platform receives and stores the execution result fed back by the energy storage device, and feeds back the execution result to the user terminal.
The steps S3 and S6 further include classifying the energy storage devices, screening out the energy storage devices meeting the conditions, sorting the energy storage devices, and generating the control signal; the classification basis comprises the position information, the working mode, the charge and discharge price and the capacity of the energy storage device; the sequencing basis includes charge and discharge price, capacity, and product of price and capacity of the energy storage device.
The energy transaction system and the method of the invention can fully meet the self-desire of the user to obtain the benefit and reduce the cost by effectively controlling the energy storage device to determine the working state of the energy storage device according to the setting of the user in the single machine mode and the renting mode. Under the networking mode, based on user setting, the energy trading platform controls the charging and discharging or standby of the corresponding energy storage device according to power trading data such as power consumption demand, real-time electricity price, current power consumption, current power generation amount and the like in the region and according to a certain sequencing rule, so that power consumption fluctuation in a regional power grid can be inhibited, and the maximization of multi-party benefits is realized. The invention can realize energy interaction between the energy storage device and the power grid, so that the energy storage system can be shared and shared in a large range, the operation stability of the power grid is improved, and the energy cost of a user is effectively reduced.
In conclusion, the above description is only for the preferred embodiment of the present invention and should not be construed as limiting the present invention, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. The energy transaction system based on distributed energy storage is characterized by comprising a user terminal, an energy storage device and an energy transaction platform, wherein:
the user terminal is terminal equipment with a network communication function and is used for receiving set data and receiving an execution result fed back by the energy storage device and/or an execution result fed back by the energy trading platform;
the energy storage device is used for receiving set data from the user terminal or a control signal sent by the energy trading platform to determine the working state of the energy storage device and feeding back an execution result to the energy trading platform and/or the user terminal; the working state comprises charging, discharging or standby;
the energy trading platform is used for receiving real-time electric power trading data and setting data from the user terminal to generate the control signal, receiving and storing an execution result fed back by the energy storage device and feeding back the execution result to the user terminal, and the energy trading platform is independent of a power grid;
the setting data comprises the working mode of the energy storage device, and the working mode comprises a networking mode, a leasing mode or a single machine mode;
the networking mode is as follows: the energy storage device is controlled by the energy trading platform;
the leasing mode is as follows: the user transfers the control and the use authority of the energy storage device to a third party and receives the income;
the single machine mode is as follows: the energy storage device is only controlled by the user terminal and is not controlled by the energy transaction platform.
2. The distributed energy storage based energy trading system of claim 1, wherein the setting data further comprises operating parameters in a networking mode and a rental mode, wherein: the operating parameters in the networking mode include: position information, capacity, discharge price, charge price of the energy storage device; the operating parameters in the rental mode include: the time period of the rental mode and the expected revenue.
3. The distributed energy storage-based energy trading system according to claim 1, wherein the setting data further comprises operating parameters in a stand-alone mode, including: energy storage device discharge price, charge price, dischargeable capacity, charge capacity.
4. The energy transaction system based on the distributed energy storage according to claim 1, wherein the energy storage device comprises an energy storage element, an electric energy conversion unit and a management unit, the management unit comprises a control unit and a communication interface, the control unit receives the setting data or a control signal sent by the energy transaction platform through the communication interface, controls the electric energy conversion unit and the energy storage element to execute corresponding working states, and feeds back an execution result to the energy transaction platform and/or the user terminal.
5. The energy transaction system based on distributed energy storage according to claim 4, wherein the energy storage device further comprises an electric quantity metering unit for collecting electric quantity data of discharging or charging of the energy storage device.
6. The distributed energy storage based energy transaction system according to claim 1, wherein the energy transaction platform comprises a server, the server is configured with an information management unit and an energy transaction unit, the information management unit is used for receiving the electric power transaction data and setting data from a user terminal and classifying the energy storage devices; and the energy transaction unit screens out energy storage devices meeting the conditions based on the electric power transaction data and the set data of the user terminal, sorts the energy storage devices and generates the control signals.
7. The distributed energy storage based energy transaction system according to claim 6, wherein the information management unit is further configured to receive registration information sent by the user terminal, and generate an identification code uniquely corresponding to the registered energy storage device.
8. The distributed energy storage based energy trading system according to claim 6, wherein the classification criteria includes location information, operating mode, charge and discharge price or capacity of the energy storage device.
9. The distributed energy storage based energy trading system of claim 6, wherein the ranking is based on a charge-discharge price, capacity or product of price and capacity of the energy storage device.
10. The distributed energy storage based energy trading system according to claim 1, wherein the energy trading platform further comprises an electricity price prediction module, which provides prediction information including electricity consumption, electricity generation and electricity price, and feeds the prediction information back to the user terminal.
11. The system of claim 1 or 7, wherein the user terminal comprises at least one of a first user terminal independent of the energy storage device and a second user terminal integrated with the energy storage device.
12. An energy transaction method based on distributed energy storage is characterized by comprising the following steps:
step 1, a user terminal receives set data, wherein the set data comprise working modes of an energy storage device and working parameters in all the modes, and the user terminal sends the set data to an energy trading platform and the energy storage device; the working mode comprises a single machine mode, a networking mode or a renting mode, and if the working mode set by the user is the single machine mode, the step 2 is executed; if the working mode set by the user is the networking mode, executing the step 3-5; if the working mode set by the user is a renting mode, executing the step 6-8;
step 2, the energy storage device determines the working state of the energy storage device according to the working parameters in the single machine mode, and feeds back the execution result to the user terminal, wherein the working state comprises charging, discharging or standby;
step 3, the energy trading platform generates a control signal according to the real-time electric power trading data and the working parameters in the networking mode;
step 4, the energy storage device determines the working state of the energy storage device according to the control signal, and feeds back an execution result to the energy trading platform/the energy trading platform and the user terminal, wherein the working state comprises charging, discharging or standby;
step 5, the energy trading platform receives and stores the execution result fed back by the energy storage device, and feeds back the execution result to the user terminal;
step 6, the energy trading platform generates a control signal according to the real-time electric power trading data and the set data from the third party;
step 7, the energy storage device determines the working state of the energy storage device according to the control signal and feeds an execution result back to the energy trading platform/the energy trading platform and the user terminal, wherein the working state comprises charging, discharging or standby;
and 8, the energy trading platform receives and stores the execution result fed back by the energy storage device, and feeds back the execution result to the user terminal.
13. The energy transaction method based on distributed energy storage according to claim 12, wherein the steps 3 and 6 further comprise classifying the energy storage devices, screening out the energy storage devices meeting the condition, and sorting to generate the control signal; the classification basis comprises the position information, the working mode, the charge and discharge price and the capacity of the energy storage device; the sequencing basis includes charge and discharge price, capacity, and product of price and capacity of the energy storage device.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856930A (en) * | 2012-10-11 | 2013-01-02 | 天津市电力公司 | Micro-grid economic dispatching control method |
| CN102904278A (en) * | 2012-09-20 | 2013-01-30 | 江苏万丰光伏有限公司 | Distribution type grid connection photovoltaic system power supply |
| CN104268806A (en) * | 2014-11-03 | 2015-01-07 | 四川慧盈科技有限责任公司 | Micro grid power monitoring system |
| CN107294119A (en) * | 2017-08-09 | 2017-10-24 | 青岛特来电新能源有限公司 | Electric energy exchange method, device, system and the server of electric car and micro-grid system |
| KR20180007081A (en) * | 2016-07-12 | 2018-01-22 | 전복규 | Method and system for trading peak-time energy using ess connected time automatic switch |
-
2018
- 2018-03-22 CN CN201810237913.3A patent/CN110298715B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904278A (en) * | 2012-09-20 | 2013-01-30 | 江苏万丰光伏有限公司 | Distribution type grid connection photovoltaic system power supply |
| CN102856930A (en) * | 2012-10-11 | 2013-01-02 | 天津市电力公司 | Micro-grid economic dispatching control method |
| CN104268806A (en) * | 2014-11-03 | 2015-01-07 | 四川慧盈科技有限责任公司 | Micro grid power monitoring system |
| KR20180007081A (en) * | 2016-07-12 | 2018-01-22 | 전복규 | Method and system for trading peak-time energy using ess connected time automatic switch |
| CN107294119A (en) * | 2017-08-09 | 2017-10-24 | 青岛特来电新能源有限公司 | Electric energy exchange method, device, system and the server of electric car and micro-grid system |
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