Micro-grid energy management system based on EMS

Abstract

The invention discloses a micro-grid energy management system based on an EMS, and belongs to the technical field of micro-grid energy management, the micro-grid energy management system comprises a control terminal unit, the control terminal unit is in signal connection with a data processing unit, the control terminal unit is in signal connection with a sensing unit, the control terminal unit is electrically connected with an alarm unit, and the alarm unit is in signal connection with the data processing unit. The control terminal unit is in signal connection with a data collection unit, the data collection unit is in signal connection with a data acquisition unit, the control terminal unit is electrically connected with an energy storage unit, and the sensing unit comprises a temperature sensor, a voltage sensor and a current sensor. The sensing unit is in signal connection with a temperature sensor, a voltage sensor and a current sensor. According to the invention, the EMS monitors the operation states and energy consumption conditions of various energy devices in the micro-grid in real time through the remote control unit, the problems of energy waste and unreasonable utilization can be found in time, and corresponding optimization measures are taken, so that the energy utilization efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of microgrid energy management, and in particular to an EMS-based microgrid energy management system. Background Art

[0002] With the continuous growth of global energy demand and the rapid development of renewable energy technology, modern power grids are undergoing a transformation from traditional models to more intelligent and green ones. This transformation requires the power grid to have higher flexibility, reliability and economy to cope with changes in energy structure and diversified user needs. Microgrids, as a new type of power system, integrate distributed energy (such as solar energy, wind energy, etc.) and energy storage systems to form a local power grid that can operate independently or in parallel. Microgrids have a high degree of autonomy and flexibility, and can provide emergency power when the main power grid fails. At the same time, they can also improve the utilization rate of renewable energy and the reliability of the power grid. However, the existing microgrids have low energy utilization rates and cannot achieve the integration and optimal utilization of multiple energy sources to form a diversified energy supply structure and improve energy reliability and safety. Summary of the invention

[0003] The purpose of the present invention is to provide a microgrid energy management system based on EMS to solve the problems raised in the above background technology but the existing microgrid has low energy utilization rate and cannot realize the integration and optimal utilization of multiple energy sources to form a diversified energy supply structure and improve the reliability and safety of energy.

[0004] To achieve the above object, the present invention provides the following technical solution: an EMS-based microgrid energy management system, comprising a control terminal unit, the control terminal unit signal is connected to a data processing unit, the control terminal unit signal is connected to a sensor unit, the control terminal unit is electrically connected to an alarm unit, the control terminal unit is signal connected to a data collection unit, the data collection unit signal is connected to a data acquisition unit, and the control terminal unit is electrically connected to an energy storage unit;

[0005] The control terminal unit includes: S1: as the core control device of the microgrid power station, responsible for the dynamic balance control of the distributed power output and load power demand in the microgrid;

[0006] The data collection unit includes: S5: responsible for real-time collection and storage of various equipment operation data in the microgrid, such as voltage, current, power, and temperature;

[0007] The data acquisition unit includes: S6: responsible for real-time acquisition of various equipment operation data in the microgrid, such as voltage, current, power, and temperature;

[0008] As a further preferred embodiment of the present technical solution: the sensing unit comprises a temperature sensor, a voltage sensor, and a current sensor, and the sensing unit is signal-connected to the temperature sensor, the voltage sensor, and the current sensor;

[0009] The sensing unit comprises: S3: used to measure data of various factors and transmit them to the data acquisition module;

[0010] As a further preferred embodiment of the present technical solution: the alarm unit comprises an audible and visual alarm, and the audible and visual alarm is provided with a loudspeaker;

[0011] The alarm unit includes: S4: real-time monitoring of the operating status of the equipment in the microgrid, timely detection and processing of equipment failures, and alarming;

[0012] As a further preferred embodiment of the present technical solution: the alarm unit includes a remote control unit, a relay, and an intelligent dispatching unit, the alarm unit is electrically connected to the remote control unit, the alarm unit is electrically connected to the control terminal unit through the relay, and the alarm unit signal is connected to the intelligent dispatching unit;

[0013] As a further preferred embodiment of the present technical solution: the temperature sensor, the voltage sensor, and the current sensor are electrically connected to a processing chip on the control terminal unit respectively;

[0014] As a further preferred embodiment of the present technical solution: the energy storage unit includes a battery energy storage system, a supercapacitor, and a flywheel energy storage;

[0015] The formula for calculating the operating cost is:

[0016]

[0017] in:

[0018] T is the number of time periods in the optimization cycle; N DG is the number of distributed generation sources;

[0019] C i (P DG,i,t ) is the operating cost of the i-th distributed generation at time t;

[0020] C ESS (P ESS,t ) is the operating cost of the energy storage system at time t;

[0021] C buy (P buy,t ) is the cost of purchasing electricity from the main grid;

[0022] C sell (P sell,t ) is the income from the sale of electricity to the main grid;

[0023] As a further preferred embodiment of the technical solution: the communication modules of the control terminal units are all 5G;

[0024] As a further preferred embodiment of the present technical solution: the alarm unit drives the sound and light alarm to give an alarm through the remote control unit;

[0025] As a further preferred embodiment of the present technical solution: the temperature sensor, the voltage sensor, and the current sensor are connected to the sensing unit in parallel;

[0026] As a further preferred embodiment of the technical solution: the intelligent dispatching unit controls the charging and discharging operations of the energy storage unit and the power generation dispatching of the distributed power source;

[0027] The power balance formula of microgrid operation is:

[0028] P gen,t +P ESSin,t -P ESSout,t +P buy,t -P sell,t =P load,t

[0029] in:

[0030] P gen,t is the total power generation of all distributed generation sources at time t;

[0031] P ESS_in,t and P ESS_out,t are the charging and discharging amounts of the energy storage system at time t, respectively;

[0032] P load,t is the total load demand at time t.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. In the present invention, the EMS monitors the operating status and energy consumption of various energy devices in the microgrid in real time through a remote control unit, can promptly discover problems of energy waste and unreasonable utilization, and take corresponding optimization measures to improve energy utilization efficiency;

[0035] 2. In the present invention, the EMS can perform energy dispatch and control through the intelligent dispatch unit according to the real-time energy demand and system operation status, such as adjusting the charging and discharging strategy of the energy storage facility, optimizing the power generation output of the distributed power source, etc., to achieve efficient use of energy;

[0036] 3. In the present invention, EMS can achieve seamless connection with renewable energy power generation system, solve the intermittent and volatility problems of renewable energy power generation, improve the grid connection efficiency and utilization level of renewable energy, and through the optimized configuration and scheduling strategy of EMS, it can realize the integration and optimal utilization of multiple energy sources, form a diversified energy supply structure, and improve the reliability and safety of energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 The process of a microgrid energy management system based on EMS of the present invention is as follows Figure 1 ;

[0038] Figure 2 The process of a microgrid energy management system based on EMS of the present invention is as follows Figure 2 ;

[0039] Figure 3 The process of a microgrid energy management system based on EMS of the present invention is as follows Figure 3 ;

[0040] Figure 4 The process of a microgrid energy management system based on EMS of the present invention is as follows Figure 4 ;

[0041] Figure 5 The process of a microgrid energy management system based on EMS of the present invention is as follows Figure 5 .

[0042] In the figure: 1. Control terminal unit; 2. Data processing unit; 3. Sensing unit; 4. Alarm unit; 5. Data collection unit; 6. Data acquisition unit; 7. Energy storage unit; 301. Temperature sensor; 302. Voltage sensor; 303. Current sensor; 401. Sound and light alarm; 402. Remote control unit; 403. Relay; 404. Intelligent scheduling unit. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Example

[0045] See also Figure 1-Figure 5As shown, the present invention provides a technical solution: a microgrid energy management system based on EMS, including a control terminal unit 1, the control terminal unit 1 is signal-connected with a data processing unit 2, the control terminal unit 1 is signal-connected with a sensor unit 3, the control terminal unit 1 is electrically connected with an alarm unit 4, the control terminal unit 1 is signal-connected with a data collection unit 5, the data collection unit 5 is signal-connected with a data acquisition unit 6, and the control terminal unit 1 is electrically connected with an energy storage unit 7. The operating status and energy consumption of various energy equipment in the microgrid are monitored in real time through a remote control unit 402, so that problems of energy waste and unreasonable utilization can be discovered in time, and corresponding optimization measures can be taken to improve energy utilization efficiency.

[0046] In this embodiment, specifically: the sensing unit 3 includes a temperature sensor 301 , a voltage sensor 302 , and a current sensor 303 , and the sensing unit 3 is signal-connected to the temperature sensor 301 , the voltage sensor 302 , and the current sensor 303 .

[0047] In this embodiment, specifically: the alarm unit 4 includes an audible and visual alarm 401 , and a loudspeaker is provided on the audible and visual alarm 401 .

[0048] In this embodiment, specifically: the alarm unit 4 includes a remote control unit 402, a relay 403, and an intelligent scheduling unit 404. The alarm unit 4 is electrically connected to the remote control unit 402. The alarm unit 4 is electrically connected to the control terminal unit 1 through the relay 403. The alarm unit 4 signal is connected to the intelligent scheduling unit 404. The EMS can perform energy scheduling and control through the intelligent scheduling unit 404 according to the real-time energy demand and system operation status, such as adjusting the charging and discharging strategy of the energy storage facility, optimizing the power generation output of the distributed power source, etc., to achieve efficient use of energy.

[0049] In this embodiment, specifically: the temperature sensor 301 , the voltage sensor 302 , and the current sensor 303 are electrically connected to the processing chip on the control terminal unit 1 , respectively.

[0050] In this embodiment, specifically: the energy storage unit 7 includes a battery energy storage system, a supercapacitor, and a flywheel energy storage.

[0051] In this embodiment, specifically: the communication modules of the control terminal unit 1 are all data collection units 5G.

[0052] In this embodiment, specifically: the alarm unit 4 drives the sound and light alarm 401 to sound an alarm through the remote control unit 402.

[0053] In this embodiment, specifically: the temperature sensor 301 , the voltage sensor 302 , and the current sensor 303 are connected to the sensing unit 3 in parallel.

[0054] In this embodiment, specifically: the intelligent scheduling unit 404 controls the charging and discharging operations of the energy storage unit 7 and the power generation scheduling of the distributed power source.

[0055] Working principle or structural principle: First, the data acquisition unit 6 will collect the temperature, voltage and current data in the circuit through the temperature sensor 301, voltage sensor 302 and current sensor 303 on the sensor unit 3, and then transmit them to the data collection unit 5, the data collection unit 5 transmits them to the control terminal unit 1, the control terminal unit 1 transmits them to the alarm unit 4, the alarm unit 4 drives the speaker to alarm by driving the sound and light alarm 401, and the intelligent scheduling unit 404 controls the charging and discharging operations of the energy storage unit 7 and the power generation scheduling of the distributed power supply to ensure the normal operation of the equipment. Secondly, the remote control unit 402 monitors the operating status and energy consumption of various energy equipment in the microgrid in real time, so as to timely discover the problems of energy waste and unreasonable utilization, and take corresponding optimization measures to improve the energy utilization efficiency. The intelligent scheduling unit 404 performs energy scheduling and control, such as adjusting the charging and discharging strategy of the energy storage facility, optimizing the power generation output of the distributed power supply, etc., to achieve efficient utilization of energy.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A microgrid energy management system based on EMS, comprising a control terminal unit (1), characterized in that: The control terminal unit (1) is signal-connected to a data processing unit (2), the control terminal unit (1) is signal-connected to a sensor unit (3), the control terminal unit (1) is electrically connected to an alarm unit (4), the control terminal unit (1) is signal-connected to a data collection unit (5), the data collection unit (5) is signal-connected to a data acquisition unit (6), and the control terminal unit (1) is electrically connected to an energy storage unit (7); The control terminal unit (1) comprises: S1: as the core control device of the microgrid power station, responsible for the dynamic balance control of the output of the distributed power source and the load power demand in the microgrid; The data collection unit (5) comprises: S5: responsible for collecting and storing various equipment operation data in the microgrid in real time, such as voltage, current, power, and temperature; The data acquisition unit (6) comprises: S6: responsible for real-time acquisition of operating data of various devices in the microgrid, such as voltage, current, power, and temperature.

2. The microgrid energy management system based on EMS according to claim 1, characterized in that: The sensing unit (3) comprises a temperature sensor (301), a voltage sensor (302), and a current sensor (303); and the sensing unit (3) is signal-connected to the temperature sensor (301), the voltage sensor (302), and the current sensor (303); The sensor unit (3) comprises: S3: used to measure data of various factors and transmit them to the data acquisition module.

3. The microgrid energy management system based on EMS according to claim 2, characterized in that: The alarm unit (4) comprises an audible and visual alarm (401), and the audible and visual alarm (401) is provided with a loudspeaker; The alarm unit (4) comprises: S4: real-time monitoring of the operating status of the equipment in the microgrid, timely detection and processing of equipment failures, and alarming.

4. The microgrid energy management system based on EMS according to claim 3 is characterized in that: The alarm unit (4) comprises a remote control unit (402), a relay (403), and an intelligent scheduling unit (404); the alarm unit (4) is electrically connected to the remote control unit (402); the alarm unit (4) is electrically connected to the control terminal unit (1) via the relay (403); and the alarm unit (4) is signal-connected to the intelligent scheduling unit (404).

5. The microgrid energy management system based on EMS according to claim 4, characterized in that: The temperature sensor (301), the voltage sensor (302), and the current sensor (303) are respectively electrically connected to a processing chip on the control terminal unit (1).

6. The microgrid energy management system based on EMS according to claim 5, characterized in that: The energy storage unit (7) includes a battery energy storage system, a supercapacitor, and a flywheel energy storage; The formula for calculating the operating cost is: in: T is the number of time periods in the optimization cycle. DG is the number of distributed generation sources; C i (P DG,i,t ) is the operating cost of the i-th distributed generation at time t; C ESS (P ESS,t ) is the operating cost of the energy storage system at time t; C buy (P buy,t ) is the cost of purchasing electricity from the main grid; C sell (P sell,t ) is the revenue from selling electricity to the main grid.

7. The microgrid energy management system based on EMS according to claim 6, characterized in that: The communication modules of the control terminal units (1) are all 5G.

8. The microgrid energy management system based on EMS according to claim 7, characterized in that: The alarm unit (4) drives the sound and light alarm (401) to sound an alarm via a remote control unit (402).

9. The microgrid energy management system based on EMS according to claim 8, characterized in that: The temperature sensor (301), the voltage sensor (302), and the current sensor (303) are connected to the sensing unit (3) in parallel.

10. The microgrid energy management system based on EMS according to claim 9, characterized in that: The intelligent dispatching unit (404) controls the charging and discharging operations of the energy storage unit (7) and the power generation dispatching of the distributed power source; The power balance formula for microgrid operation is: P gen,t +P ESSin,t -P ESSout,t +P buy,t -P sell,t =P load,t in: P gen,t is the total power generation of all distributed generation sources at time t; P ESS_in,t and P ESS_out,t are the charging and discharging amounts of the energy storage system at time t, respectively; P load,t is the total load demand at time t.

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