CN-224218113-U - Energy management device of light-storage straight-flexible micro-grid

CN224218113UCN 224218113 UCN224218113 UCN 224218113UCN-224218113-U

Abstract

The energy management device of the light storage direct-flexible micro-grid comprises a data acquisition module, a data storage module and a strategy control module, wherein the strategy control module is connected with a switch. One end of the first switch is connected with an alternating current bus, the other end of the first switch is connected with a distribution circuit, one end of the second switch is connected with an alternating current load, the other end of the second switch is connected with the alternating current bus, one end of the third switch is connected with a direct current bus, the other end of the third switch is connected with the alternating current bus, one end of the fourth switch is connected with a V2G charging pile, the other end of the fourth switch is connected with the direct current bus, one end of the fifth switch is connected with the direct current load, the other end of the fifth switch is connected with the direct current bus, one end of the sixth switch is connected with an energy storage battery device, the other end of the sixth switch is connected with the direct current bus, one end of the seventh switch is connected with a photovoltaic power generation device, and the other end of the seventh switch is connected with the direct current bus. The device can realize multi-energy complementation and supply and demand matching, and improves the reliability and economy of the micro-grid.

Inventors

WANG DAOLING
MA XINLONG
HU ZHIHUI
LI LULING
DAI MINGMING
MO WENWEN
YU JIANTING
Kong Shuting

Assignees

深圳市燃气集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250729

Claims (10)

1. An energy management device for a light-storing direct-flexible micro-grid, comprising: The system comprises a data acquisition module (21), a data storage module (22) and a strategy control module (23); The data acquisition module (21) is connected with the data storage module (22), the data storage module (22) is connected with the strategy control module (23), and the strategy control module (23) is respectively connected with the first switch (K1), the second switch (K2), the third switch (K3), the fourth switch (K4), the fifth switch (K5), the sixth switch (K6) and the seventh switch (K7); one end of the first switch (K1) is connected with the alternating current bus (10), and the other end of the first switch (K1) is connected with the distribution line (9); One end of the second switch (K2) is connected with the alternating current load (11), and the other end of the second switch (K2) is connected with the alternating current bus (10); One end of the third switch (K3) is connected with the direct current bus (13), and the other end of the third switch (K3) is connected with the alternating current bus (10); One end of the fourth switch (K4) is connected with the V2G charging pile (14), and the other end of the fourth switch (K4) is connected with the direct current bus (13); One end of the fifth switch (K5) is connected with the direct current load (16), and the other end of the fifth switch (K5) is connected with the direct current bus (13); One end of the sixth switch (K6) is connected with the energy storage battery device (18), and the other end of the sixth switch (K6) is connected with the direct current bus (13); One end of the seventh switch (K7) is connected with the photovoltaic power generation device (20), and the other end of the seventh switch (K7) is connected with the direct current bus (13).
2. The energy management device of the light-storage direct-flexible micro-grid according to claim 1, wherein the data acquisition module (21) comprises a sensor (28), a signal conditioning module (29), a data acquisition unit (30) and a communication interface (31), the sensor (28) is connected with the signal conditioning module (29), the signal conditioning module (29) is connected with the data acquisition unit (30), and the data acquisition unit (30) is respectively connected with the data storage module (22) and the communication interface (31).
3. The energy management device of the light storage direct-flexible micro-grid according to claim 1, wherein the power distribution network (8) is connected with the other end of the first switch (K1) through a power distribution line (9), and one end of the first switch (K1) is connected with the alternating-current bus (10); The alternating current bus (10) is connected with the other end of the third switch (K3) through the DC/AC bidirectional rectifier (12), and one end of the third switch (K3) is connected with the direct current bus (13); The direct current bus (13) is connected with the other end of the fifth switch (K5) through the step-down DC/DC converter (15), and one end of the fifth switch (K5) is connected with the direct current load (16); The direct current bus (13) is connected with the other end of the sixth switch (K6) through the energy storage DC/DC converter (17), and one end of the sixth switch (K6) is connected with the energy storage battery device (18); The direct current bus (13) is connected with the other end of a seventh switch (K7) through a photovoltaic DC/DC converter (19), and one end of the seventh switch (K7) is connected with a photovoltaic power generation device (20).
4. The energy management device of the light-storage direct-flexible micro-grid according to claim 3, wherein the DC/AC bidirectional rectifier (12) realizes bidirectional energy flow between an alternating-current bus (10) and a direct-current bus (13) and is used for converting electric energy forms between the power distribution network (8) and a direct-current system.
5. The energy management device of the optical storage direct-soft micro-grid according to claim 3, wherein the step-down DC/DC converter (15) converts higher direct-current voltage into lower direct-current voltage suitable for the direct-current load (16) to work, and plays a role in voltage matching and regulation.
6. The energy management device of the optical storage direct-soft micro-grid according to claim 3, wherein the energy storage DC/DC converter (17) is used for controlling energy exchange between the energy storage battery device (18) and the direct-current bus (13), electric energy of the direct-current bus (13) is charged into the energy storage battery device (18) with proper voltage and current parameters in a charging process, and electric energy of the energy storage battery device (18) is converted into electric energy suitable for the direct-current bus (13) to be output in a discharging mode, so that charging and discharging control of the energy storage battery device (18) is realized.
7. The energy management device of the optical storage direct-flexible micro-grid according to claim 3, wherein the photovoltaic DC/DC converter (19) processes direct current output by the photovoltaic power generation device (20), and the maximum power point tracking of the photovoltaic cell is realized by adjusting voltage and current parameters, and photovoltaic electric energy is adapted to the voltage level of the direct-current bus (13).
8. The energy management device of the light-storage direct-flexible micro-grid is characterized in that the V2G charging pile (14) realizes bidirectional conversion of electric energy through a power electronic conversion device, and when in charging, alternating current of the grid is rectified into direct current to charge a vehicle battery, and when in discharging, direct current of the vehicle battery is inverted into alternating current to feed back to the grid.
9. The energy management device of the photovoltaic direct and flexible micro grid according to claim 1, wherein the photovoltaic power generation device (20) comprises photovoltaic panels (24) and a centralized photovoltaic inverter (25), and the photovoltaic panels (24) are connected with the centralized photovoltaic inverter (25).
10. The energy management device of the optical storage direct and flexible micro-grid according to claim 1, wherein the energy storage battery device (18) comprises an energy storage battery (26) and an energy storage inverter (27), and the energy storage battery (26) is connected with the energy storage inverter (27).

Description

Energy management device of light-storage straight-flexible micro-grid Technical Field The utility model relates to the technical field of regulation and control of a light Chu Zhirou micro-grid, in particular to an energy management device of a light storage straight-flexible micro-grid. Background Under the global energy clean transformation trend, the light Chu Zhirou micro-grid realizes self-giving flexible dispatching of small-area electric energy by integrating photovoltaic, energy storage, direct current distribution and flexible control technologies, effectively improves the utilization efficiency of renewable energy sources and reduces the dependence of the grid. However, the current system energy management has the remarkable problems that photovoltaic output is greatly fluctuated under the influence of weather, and the charging and discharging efficiency and the service life of energy storage equipment are limited, so that dynamic balance of power generation, energy storage and power utilization is difficult, and energy waste and battery loss are aggravated. The existing management device has single control strategy, lacks the global optimization capability of a multi-energy source flow, cannot be flexibly scheduled according to load and equipment states, has technical bottlenecks in the aspects of direct-current voltage stable control, multi-energy storage coordination, power grid interaction response and the like, and is difficult to meet intelligent and economic operation requirements. Therefore, the development of the energy management device with the cooperation of efficient scheduling, precise control and intelligence has important significance for improving the performance of the micro-grid and promoting the application of distributed energy sources. Disclosure of Invention In order to solve the technical problems, the utility model provides an energy management device of an optical storage direct-flexible micro-grid, which can flexibly distribute energy through intelligent control of a switch and mode adjustment of a converter, and is suitable for working conditions such as grid connection/island, load change, new energy output fluctuation and the like. Therefore, the multi-energy complementation and supply-demand matching are realized, and the reliability and the economy of the micro-grid are improved. The technical scheme adopted by the utility model is as follows: An energy management device for a light-storing direct-flexible microgrid, the device comprising: the system comprises a data acquisition module, a data storage module and a strategy control module; The data acquisition module is connected with the data storage module, the data storage module is connected with the strategy control module, and the strategy control module is respectively connected with the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, the fifth switch K5, the sixth switch K6 and the seventh switch K7; One end of the first switch K1 is connected with an alternating current bus, and the other end of the first switch K1 is connected with a distribution line; One end of the second switch K2 is connected with an alternating current load, and the other end of the second switch K2 is connected with an alternating current bus; one end of the third switch K3 is connected with the direct current bus, and the other end of the third switch K3 is connected with the alternating current bus; One end of the fourth switch K4 is connected with the V2G charging pile, and the other end of the fourth switch K4 is connected with the direct current bus; one end of the fifth switch K5 is connected with a direct current load, and the other end of the fifth switch K5 is connected with a direct current bus; One end of the sixth switch K6 is connected with the energy storage battery device, and the other end of the sixth switch K6 is connected with the direct current bus; one end of the seventh switch K7 is connected with the photovoltaic power generation device, and the other end of the seventh switch K7 is connected with the direct current bus. The data acquisition module comprises a sensor, a signal conditioning module, a data acquisition unit and a communication interface, wherein the sensor is connected with the signal conditioning module, the signal conditioning module is connected with the data acquisition unit, and the data acquisition unit is respectively connected with the data storage module and the communication interface. As shown in fig. 1, the power distribution network is connected with the other end of a first switch K1 through a power distribution line, and one end of the first switch K1 is connected with an alternating current bus; the alternating current bus is connected with the other end of the third switch K3 through a DC/AC bidirectional rectifier, and one end of the third switch K3 is connected with the direct current bus; The direct current bus is connected with the other end o