Power distribution equipment energy efficiency management system in new energy consumption process

Abstract

The invention discloses a power distribution equipment energy efficiency management system in a new energy consumption process, and relates to the technical field of power grid energy efficiency management. Comprising a data acquisition unit, the data acquisition unit is in wireless connection with a server, the server is connected with an SDM looped network through a switch, the SDM looped network is in network connection with a control unit, and the control unit comprises a second single-chip microcomputer, a storage module, an A / D conversion module, a comparison module, a data processing module, an energy efficiency management module, an early warning module and a third wireless communication module. The control unit is in network connection with the output display unit, and the control unit is electrically connected with the energy storage unit; according to the method, the load energy efficiency information of the power distribution equipment is collected, the reasonable boundary of the energy efficiency of the power distribution equipment in the new energy consumption process is measured and calculated according to the time-sharing power and the electrical data of the power distribution equipment, quantitative data support is provided for related work, and early warning and solution schemes are provided; and distribution network new energy access planning, scheduling and business expansion decision making of the power grid are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid energy efficiency management, and particularly to an energy efficiency management system for distribution equipment during the consumption of new energy. Background Art

[0002] Due to the huge gap between the inherent resource attributes and grid connection characteristics of wind and light and conventional controllable power sources, it is impossible to "generate electricity according to consumption". Since power electronic devices are used for grid connection, the support for grid voltage, frequency, inertia, etc. is limited. The traditional power system is mainly established around conventional energy sources and has inherent characteristics, making it unable to adapt to the large-scale connection of new energy to the grid. It is necessary to make breakthroughs in prediction and grid-forming power generation technologies to support the stable operation of the power system, that is, to continuously strengthen the monitoring, early warning, and dynamic balancing capabilities of new energy grid connection, and support new energy to have a more reliable power supply capacity and ensure safe and stable operation after connecting to the grid.

[0003] In the prior art, during the consumption of new energy, there is a lack of monitoring of the energy efficiency of distribution equipment, and it is impossible to calculate the reasonable boundary of the energy efficiency of distribution equipment during the consumption of new energy, and it is impossible to provide quantitative data support for related work. Summary of the Invention

[0004] (I) Technical Problems to be Solved Aiming at the deficiencies of the prior art, the present invention provides an energy efficiency management system for distribution equipment during the consumption of new energy to solve the problems mentioned in the above background art.

[0005] (II) Technical Solutions To achieve the above object, the present invention provides the following technical solution: An energy efficiency management system for distribution equipment during the consumption of new energy, including a data acquisition unit, the data acquisition unit is wirelessly connected to a server, the server is connected to an SDM ring network through a switch, and the SDM ring network is network-connected to a control unit, the control unit is network-connected to an output display unit, and the control unit is electrically connected to an energy storage unit.

[0006] As a preferred technical solution of the present invention, the data acquisition unit includes a current sensor, a power sensor, a GPS positioning module, and a first wireless communication module.

[0007] As a preferred technical solution of the present invention, the data acquisition unit is used to collect current data at several moments at the equipment associated with the new energy grid connection point, including: input currents I1, I2,..., In at the equipment associated with the new energy grid connection point at several moments, the input current I0 of the superior power grid, and the currents a1, a2,..., an of each electrical equipment under the associated equipment at the same moment.

[0008] As a preferred technical solution of the present invention, the server includes a first single-chip microcomputer and a second wireless communication module.

[0009] As a preferred technical solution of the present invention, the control unit includes a second single-chip microcomputer, a storage module, an A / D conversion module, a comparison module, a data processing module, an energy efficiency management module, an early warning module, and a third wireless communication module.

[0010] As a preferred technical solution of the present invention, the data processing module is used to obtain the line loss rates at several moments based on the collected current data and determine the energy efficiency dynamic balance threshold; According to the formula: Ln = [(I1 + I2 + …… + In) + I0 - (a1 + a2 + …… + an)] / [(I1 + I2 + …… + In) + I0] × 100%, calculate the line loss rate Ln at each moment, where I1 selects the moment with the largest a1 + a2 + …… + an within a day, and the number of collection moments is 96; Determine the energy efficiency dynamic balance threshold: Take the line loss rate L0 when I1 + I2 + …… + In = 0 as the energy efficiency dynamic balance threshold.

[0011] As a preferred technical solution of the present invention, the energy efficiency management module is used to make a difference between the line loss rate at each moment and the energy efficiency dynamic balance threshold, and determine the energy efficiency balance point according to the positive or negative of the difference; Make a difference between the line loss rate at each moment and the energy efficiency dynamic balance threshold L0 to obtain α1, α2, α3 …… αn, that is, αi = Li - L0; When the difference is less than zero, this moment is recorded as the energy efficiency balance point, and the number n of energy efficiency balance points is counted; Since the main principle of distributed power consumption is to achieve local balance to reduce the power flow interweaving in the power grid, the energy efficiency dynamic balance state is defined as the line loss rate ln of the equipment associated with the grid connection point at a certain moment being less than l0, that is, the connection of distributed new energy to the grid does not cause an increase in equipment loss. Denote the number of energy efficiency balance points as n. If n / 96 ≤ 50%, no early warning is issued for this equipment; if n / 96 ≥ 50%, this equipment is warned as a distributed energy overloaded equipment.

[0012] As a preferred technical solution of the present invention, the output display unit includes a computer client, a display, and a mobile terminal. The input and output ends of the computer client and the display are electrically connected to the output end of the first single-chip microcomputer in the server in a two-way manner. The mobile terminal is wirelessly connected to the second single-chip microcomputer through the third wireless communication module.

[0013] As a preferred technical solution of the present invention, the energy storage unit includes a battery assembly, a voltage sensor, an energy storage converter, and a controller. The battery assembly, the voltage sensor, and the energy storage converter are connected in series in sequence, and the voltage sensor and the energy storage converter are electrically connected to the controller.

[0014] (III) Beneficial effects Compared with the prior art, the present invention provides an energy efficiency management system for distribution equipment in the process of new energy consumption, which has the following beneficial effects: The energy efficiency management system for distribution equipment in the process of new energy consumption collects the load energy efficiency information of the distribution equipment through the data acquisition unit, and feeds back the information to the control unit. The control unit calculates the reasonable boundary of the energy efficiency of the distribution equipment in the process of new energy consumption according to the time-sharing power and electrical data of the distribution equipment, and then reminds and displays through the output display unit, and balances the energy efficiency through the energy storage unit, provides quantitative data support for related work, and proposes early warnings and solutions, which is convenient for the power grid to plan, dispatch and make business expansion decisions for the access of new energy to the distribution network, improves the energy utilization rate, and reduces the power supply cost. Description of the drawings

[0015] Figure 1 It is a schematic diagram of the control system of an energy efficiency management system for distribution equipment in the process of new energy consumption proposed by the present invention; Figure 2 It is a schematic flow chart of an energy efficiency management system for distribution equipment in the process of new energy consumption proposed by the present invention. Specific implementation manners

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0017] Please refer to Figure 1 and Figure 2 , an energy efficiency management system for distribution equipment in the process of new energy consumption, includes a data acquisition unit. The data acquisition unit is wirelessly connected to a server. The server is connected to an SDM ring network through a switch, and the SDM ring network is network-connected to a control unit. The control unit is network-connected to an output display unit, and the control unit is electrically connected to an energy storage unit.

[0018] As a specific technical solution of this embodiment, the data acquisition unit includes a current sensor, a power sensor, a GPS positioning module, and a first wireless communication module.

[0019] In this implementation scheme, a current sensor, a power sensor, and a GPS positioning module are used to collect the current, load power, and location information of the power distribution equipment of new energy network points, and the information is fed back to the server through the first wireless communication module.

[0020] As a specific technical solution of this embodiment, the data acquisition unit is used to collect current data at several moments at the equipment associated with the new energy grid connection point, including: input currents I1, I2,... In at the equipment associated with the new energy grid connection point at several moments, the input current I0 of the superior power grid, and the currents a1, a2,... an of each electrical equipment under the associated equipment at the same moment.

[0021] In this implementation scheme, it is possible to collect the currents and voltages of multiple equipment associated with new energy grid connection points. The collection can be carried out using intelligent electric meters or Hall current sensors, and it supports multi-dimensional data collection of equipment such as photovoltaic, wind power, energy storage, and user loads, including parameters such as current, voltage, power, and SOC (state of charge). The sampling rate can reach up to 1 kHz; it is compatible with multiple industrial protocols such as Modbus-TCP and IEC 104, realizes the full-volume data access of equipment on the power generation side, grid side, and user side, deploys edge computing nodes (such as NVIDIA Jetson) for data cleaning and compression, applies the Kalman filtering algorithm to correct sensor errors, and reduces high-frequency data to minute-level statistical values.

[0022] As a specific technical solution of this embodiment, the server includes a first single-chip microcomputer and a second wireless communication module.

[0023] In this implementation scheme, the first single-chip microcomputer and the second wireless communication module receive the information of the data acquisition unit and feed back the information to the control unit.

[0024] As a specific technical solution of this embodiment, the control unit includes a second single-chip microcomputer, a storage module, an A / D conversion module, a comparison module, a data processing module, an energy efficiency management module, an early warning module, and a third wireless communication module.

[0025] In this implementation scheme, the second single-chip microcomputer, the storage module, the A / D conversion module, the comparison module, and the data processing module can effectively process the fed-back information, and then obtain the line loss through the energy efficiency management module and the early warning module, and issue an early warning.

[0026] As a specific technical solution of this embodiment, the data processing module is used to obtain the line loss rate at several moments based on the above-collected current data and determine the energy efficiency dynamic balance threshold; According to the formula: $L_n = \frac{(I_1 + I_2 + \cdots + I_n) + I_0 - (a_1 + a_2 + \cdots + a_n)}{(I_1 + I_2 + \cdots + I_n) + I_0} \times 100\%$. Calculate the line loss rate $L_n$ at each moment, where $I_1$ selects the moment with the largest $a_1 + a_2 + \cdots + a_n$ within a day, and the acquisition moments are 96; Determine the energy efficiency dynamic balance threshold: Use the line loss rate $L_0$ when $I_1 + I_2 + \cdots + I_n = 0$ as the energy efficiency dynamic balance threshold.

[0027] In this implementation plan, the energy efficiency dynamic balance threshold of the network point is obtained through the above calculation formula.

[0028] As a specific technical solution of this embodiment, the energy efficiency management module is used to calculate the difference between the line loss rate at each moment and the energy efficiency dynamic balance threshold, and determine the energy efficiency balance point according to the positive or negative of the difference; Calculate the difference between the line loss rate at each moment and the energy efficiency dynamic balance threshold $L_0$ to obtain $\alpha_1, \alpha_2, \alpha_3 \cdots \alpha_n$, that is, $\alpha_i = L_i - L_0$; When the difference is less than zero, this moment is recorded as the energy efficiency balance point, and the number of energy efficiency balance points $n$ is counted; Since the main principle of distributed power consumption is to achieve local balance to reduce the power flow interweaving in the power grid, the energy efficiency dynamic balance state is defined as the line loss rate $l_n$ of the equipment associated with the grid connection point at a certain moment is less than $l_0$, that is, the grid connection of distributed new energy does not cause an increase in equipment loss. Denote the number of energy efficiency balance points as $n$. If $n / 96 \leq 50\%$, no warning is issued for this equipment; if $n / 96 \geq 50\%$, this equipment is warned as a distributed energy overload equipment.

[0029] In this implementation plan, after obtaining the energy efficiency dynamic balance threshold, the energy efficiency balance point is obtained by calculating the difference between the line loss rate and the energy efficiency dynamic balance threshold $L_0$, and a warning message is generated.

[0030] As a specific technical solution of this embodiment, the output display unit includes a computer client, a monitor, and a mobile terminal. The input and output ends of the computer client and the monitor are electrically connected to the output end of the first single-chip microcomputer in the server in a two-way manner. The mobile terminal is wirelessly connected to the second single-chip microcomputer through a third wireless communication module.

[0031] In this implementation plan, the warning message is pushed to the computer and the monitor, and is also pushed to the mobile terminal via text message or platform message, and a diagnostic report is automatically generated to dynamically adjust the new energy output or switch the energy storage unit to achieve energy efficiency rebalance.

[0032] As a specific technical solution of this embodiment, the energy storage unit includes a battery assembly, a voltage sensor, an energy storage inverter, and a controller. The battery assembly, the voltage sensor, and the energy storage inverter are connected in series in sequence, and the voltage sensor and the energy storage inverter are electrically connected to the controller.

[0033] In this implementation, according to the warning result, the second single-chip microcomputer adjusts the energy storage inverter through the controller, thereby adjusting the charging and discharging of the battery assembly to achieve energy efficiency balance.

[0034] The working principle and usage process of the present invention: During use, the current sensor, power sensor, and GPS positioning module in the data acquisition unit collect the current, load power, and location information of the power distribution equipment of the new energy network point, and feedback the information to the server through the first wireless communication module. The first single-chip microcomputer and the second wireless communication module in the server receive the information of the data acquisition unit and feedback the information to the control unit. The second single-chip microcomputer, storage module, A / D conversion module, and comparison module in the control unit preprocess the data. According to the collected current data, the calculation formula in the data processing module is as follows: Ln = [(I1 + I2 + …… + In) + I0 - (a1 + a2 + …… + an)] / [(I1 + I2 + …… + In) + I0] × 100% is used to calculate the line loss rate Ln at each moment, where I1 selects the moment with the largest a1 + a2 + …… + an within a day, and the number of acquisition moments is 96; determine the energy efficiency dynamic balance threshold: The line loss rate L0 when I1 + I2 + …… + In = 0 is used as the energy efficiency dynamic balance threshold. The energy efficiency management module is used to calculate the difference between the line loss rate at each moment and the energy efficiency dynamic balance threshold, and determine the energy efficiency balance point according to the positive or negative of the difference; calculate the difference between the line loss rate at each moment and the energy efficiency dynamic balance threshold L0 to obtain α1, α2, α3 …… αn, that is, αi = Li - L0; when the difference is less than zero, this moment is recorded as the energy efficiency balance point, and the number of energy efficiency balance points n is counted; Since the main principle of distributed power consumption is to achieve local balance to reduce the power flow interweaving in the power grid, the energy efficiency dynamic balance state is defined as the line loss rate ln of the equipment associated with the grid connection point at a certain moment being less than l0, that is, the connection of distributed new energy to the grid does not cause an increase in equipment losses. Denote the number of energy efficiency balance points as n. If n / 96 ≤ 50%, no warning is issued for this equipment; if n / 96 ≥ 50%, this equipment is warned as a distributed energy overload device. After obtaining the energy efficiency dynamic balance threshold, the energy efficiency balance point is obtained by taking the difference between the line loss rate and the energy efficiency dynamic balance threshold L0, and a warning message is generated. The warning message is pushed to the computer and the display through the first single-chip microcomputer, and is pushed to the mobile terminal through text messages or platform messages, and a diagnostic report is automatically generated. The output of new energy is dynamically adjusted or the energy storage unit is switched to achieve energy efficiency rebalance. According to the warning result, the second single-chip microcomputer adjusts the energy storage converter through the controller, thereby adjusting the charge and discharge of the battery module to balance the energy efficiency, providing quantitative data support for relevant work, and giving warnings and solutions, which is convenient for the power grid to carry out the access planning, dispatching and service expansion decision-making of distribution network new energy, improving the energy utilization rate and reducing the power supply cost.

[0035] In summary, the energy efficiency management system of the distribution equipment in the process of new energy consumption collects the load energy efficiency information of the distribution equipment, calculates the reasonable boundary of the energy efficiency of the distribution equipment in the process of new energy consumption according to the time-sharing power and electrical data of the distribution equipment, provides quantitative data support for relevant work, and gives warnings and solutions, which is convenient for the power grid to carry out the access planning, dispatching and service expansion decision-making of distribution network new energy.

[0036] It should be noted that in this article, terms such as "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy efficiency management system for distribution equipment in the process of new energy consumption, including a data acquisition unit, characterized in that: The data acquisition unit is wirelessly connected to the server. The server is connected to the SDM ring network through a switch, and the SDM ring network is network-connected to the control unit. The control unit is network-connected to the output display unit, and the control unit is electrically connected to the energy storage unit.

2. The energy efficiency management system for distribution equipment in the process of new energy consumption according to claim 1, characterized in that: The data acquisition unit includes a current sensor, a power sensor, a GPS positioning module, and a first wireless communication module.

3. The energy efficiency management system for distribution equipment in the process of new energy accommodation according to claim 1, characterized in that: The data acquisition unit is used to collect current data at several moments at the devices associated with the new energy grid connection point, including: input currents I1, I2, …… In at several moments at the devices associated with the new energy grid connection point, the input current I0 of the superior power grid, and the currents a1, a2, …… an of each electrical device under the associated device at the same moment.

4. The energy efficiency management system for distribution equipment in the process of new energy accommodation according to claim 1, characterized in that: The server includes a first single-chip microcomputer and a second wireless communication module.

5. The energy efficiency management system for distribution equipment in the process of new energy consumption according to claim 1, characterized in that: The control unit includes a second single-chip microcomputer, a storage module, an A / D conversion module, a comparison module, a data processing module, an energy efficiency management module, a warning module, and a third wireless communication module.

6. The energy efficiency management system for distribution equipment in the process of new energy consumption according to claim 5, characterized in that: The data processing module is used to obtain the line loss rate at several moments based on the above-collected current data and determine the energy efficiency dynamic balance threshold. According to the formula: Ln = [(I1 + I2 + …… + In) + I0 - (a1 + a2 + …… + an)] / [(I1 + I2 + …… + In) + I0] × 100%, calculate the line loss rate Ln at each moment, where I1 selects the moment when a1 + a2 + …… + an is the largest within a day, and the number of acquisition moments is 96. Determine the energy efficiency dynamic balance threshold: Use the line loss rate L0 when I1 + I2 + …… + In = 0 as the energy efficiency dynamic balance threshold.

7. The energy efficiency management system for distribution equipment in the process of new energy consumption according to claim 5, characterized in that: The energy efficiency management module is used to make a difference between the line loss rate at each moment and the energy efficiency dynamic balance threshold, and determine the energy efficiency balance point according to the positive or negative of the difference. Make a difference between the line loss rate at each moment and the energy efficiency dynamic balance threshold L0 to obtain α1, α2, α3 …… αn, that is, αi = Li - L0. When the difference is less than zero, this moment is recorded as the energy efficiency balance point, and the number n of energy efficiency balance points is counted. Since the main principle of distributed power consumption is to achieve local balance to reduce the power flow interpenetration in the power grid, the energy efficiency dynamic balance state is defined as the line loss rate ln of the device associated with the grid connection point at a certain moment being less than l0, that is, the grid connection of distributed new energy does not cause an increase in device loss. Record the number of energy efficiency balance points as n. If n / 96 ≤ 50%, no warning is issued for this device; if n / 96 ≥ 50%, this device is warned as a distributed energy overload device.

8. The energy efficiency management system for distribution equipment in the process of new energy consumption according to claim 1, characterized in that: The output display unit includes a computer client, a display, and a mobile terminal. The input ends of the computer client and the display are bidirectionally electrically connected to the output end of the first single-chip microcomputer in the server. The mobile terminal is wirelessly connected to the second single-chip microcomputer through the third wireless communication module.

9. The energy efficiency management system for distribution equipment in the process of new energy accommodation according to claim 1, characterized in that: The energy storage unit includes a battery assembly, a voltage sensor, an energy storage inverter, and a controller. The battery assembly, the voltage sensor, and the energy storage inverter are connected in series in sequence. The voltage sensor and the energy storage inverter are electrically connected to the controller.

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