CN116667405A - A low-carbon energy-saving method and system for multi-energy complementary regulation - Google Patents

Abstract

The invention belongs to the technical field of energy conservation and environmental protection, and particularly provides a low-carbon energy-saving method and system for complementary adjustment of multiple energy sources, wherein the method comprises the following steps: if the load is smaller than the sum of the renewable energy source power generation output power in the micro-grid, the micro-grid is powered and charged to the energy storage system by controlling the energy storage converter; when the energy storage system is full, the micro-grid only transmits redundant electric energy to the large power grid or supplies power to the adjustable load; if the load is greater than the sum of the renewable energy source power generation output power in the micro-grid, the energy storage system is enabled to discharge and supply power by controlling the energy storage converter; if the energy storage system can not continue discharging, the micro-grid absorbs electric energy from the large power grid to supply power, or the adjustable load is cut off, and the non-renewable energy source is started to generate power so as to ensure the micro-grid to supply power. The electricity cost of a railway or a park is reduced, and the operation efficiency of energy application and the utilization rate of equipment are improved; improving the level of renewable energy consumption; energy conservation and emission reduction, and environmental protection; the safe operation level of the power grid is improved, and the occupation of the capacity of the distribution network is reduced.

Description

A low-carbon energy-saving method and system for multi-energy complementary regulation

technical field

The present invention relates to the technical field of energy saving and environmental protection, and more specifically, to a low-carbon energy-saving method and system for multi-energy complementary regulation.

Background technique

The National Railway Group proposed to build a modern smart railway system, strengthen the research and development and application of new vehicles, and develop technologies such as intelligent detection and monitoring, operation and maintenance. Intensive and economical use of resources and energy, promotion of the use of intelligent energy management and control systems, use of natural lighting and ventilation.

According to the requirements of carbon neutrality at the national level, the energy saving of railways is particularly important. The focus of railway energy conservation is the use of renewable energy, such as wind power, photovoltaic power generation, gas power generation, energy storage, etc. These technologies must be integrated to form a variety of complementary energy sources, which is more reliable and more efficient for the power grid. energy saving.

In the system architecture of grid-connected, off-grid, and off-grid, the utilization rate of renewable energy such as solar energy and wind energy is low, and the phenomenon of abandoning wind and light is serious. The control means are simple, and most of them are single-type energy storage systems, with poor control performance, low conversion efficiency, and large capacity redundancy. Solving the energy supply and demand side balance of the distributed system, improving the comprehensive energy utilization rate, and reducing the cost of energy storage are urgent problems that need to be solved at present.

Contents of the invention

The invention aims at the technical problem of low comprehensive utilization rate of various energy sources existing in the prior art.

The invention provides a low-carbon and energy-saving method for multi-energy complementary regulation, including:

If the load is less than the total output power of renewable energy generation in the micro-grid, the micro-grid supplies power and charges the energy storage system by controlling the energy storage converter; when the energy storage system is full, the micro-grid transmits excess power to the large grid. or power an adjustable load;

If the load is greater than the total output power of renewable energy generation in the microgrid, the energy storage system is discharged and supplied by controlling the energy storage converter; if the energy storage system cannot continue to discharge, the microgrid absorbs power from the large grid for power supply, or cuts off the adjustable load , start non-renewable energy generation to ensure microgrid power supply.

Preferably, by configuring a customized battery management system (BMS), the renewable energy power generation is stored in the lithium iron phosphate battery, and the lithium iron phosphate battery is connected to the large power grid or operated in an island.

Preferably, the renewable energy includes one or more of photovoltaic power generation, wind power generation or hydropower generation; the large power grid is formed by generating electricity from non-renewable energy sources, and the non-renewable energy sources include nuclear energy, gas-fired power generation or coal power generation one or more of them.

Preferably, the on-site environment of renewable energy power generation is monitored and displayed in real time, the daily power generation of each inverter is collected and displayed, and the real-time power generation and historical power generation are compared and analyzed to obtain the fluctuation of photovoltaic power generation with the on-site environment; wherein, Site environment includes sunlight intensity, ambient temperature and wind speed.

Preferably, according to the needs of power parameter detection in each link of photovoltaic power generation, the photovoltaic confluence collection device, DC detection instrument, and power quality analyzer are respectively applied to the combiner box, DC cabinet and AC cabinet to realize the monitoring of photovoltaic cells, combiner boxes, Acquisition, monitoring, control and adjustment of operating parameters and status data of DC cabinets, inverters, and AC cabinets to improve the efficiency of the power generation system.

Preferably, when the electricity price of the large grid is low, the energy storage system is charged; and when the price of the large grid is high, the energy storage system is discharged for use in the park.

Preferably, when the output power of renewable energy power generation drops, the energy storage system is turned on to assist in discharging and cooperate with the microgrid for power supply;

When the low power consumption period comes, the microgrid is powered and charged to the energy storage system by controlling the energy storage converter. When the peak period of power consumption comes, the energy storage system is turned on to discharge and assist the microgrid to supply power.

The present invention also provides a low-carbon energy-saving system for multi-energy complementary regulation. The system is used to realize a low-carbon energy-saving method for multi-energy complementary regulation, including a large power grid, a micro-grid, an energy storage converter and an energy storage system;

If the load is less than the total output power of renewable energy generation in the micro-grid, the micro-grid supplies power and charges the energy storage system by controlling the energy storage converter; when the energy storage system is full, the micro-grid transmits excess power to the large grid. or power an adjustable load;

If the load is greater than the total output power of renewable energy generation in the microgrid, the energy storage system is discharged and supplied by controlling the energy storage converter; if the energy storage system cannot continue to discharge, the microgrid absorbs power from the large grid for power supply, or cuts off the adjustable load , start non-renewable energy generation to ensure microgrid power supply.

The present invention also provides an electronic device, including a memory and a processor, and the processor is used to implement the steps of the low-carbon energy-saving method for multi-energy complementary regulation when executing the computer management program stored in the memory.

The present invention also provides a computer-readable storage medium, on which a computer management program is stored, and when the computer management program is executed by a processor, the steps of the low-carbon energy-saving method for multi-energy complementary regulation are realized.

Beneficial effects: The present invention provides a low-carbon energy-saving method and system for multi-energy complementary regulation, wherein the method includes: if the load is less than the total output power of renewable energy in the micro-grid, the micro-grid is powered by controlling the energy storage converter And charge the energy storage system; when the energy storage system is full, the microgrid will transmit excess electric energy to the large grid, or supply power to the adjustable load; if the load is greater than the total output power of renewable energy in the microgrid, by controlling the energy storage The converter enables the energy storage system to discharge and supply power; if the energy storage system cannot continue to discharge, the microgrid absorbs power from the large grid for power supply, or cuts off the adjustable load, and starts non-renewable energy generation to ensure the power supply of the microgrid. Reduce electricity costs for railways or parks, provide personalized energy use solutions, improve energy application operation efficiency and equipment utilization rate; improve renewable energy consumption level; Capacity occupied. Railway power supply is an important part of ensuring railway transportation. The low-carbon technology that uses a variety of energy complementary adjustments maximizes the reliability of power supply and greatly reduces carbon emissions.

Description of drawings

Fig. 1 is a flow chart of a low-carbon energy-saving method for multi-energy complementary regulation provided by the present invention;

FIG. 2 is a schematic diagram of a hardware structure of a possible electronic device provided by the present invention;

FIG. 3 is a schematic diagram of the hardware structure of a possible computer-readable storage medium provided by the present invention;

Fig. 4 is the schematic diagram of the three-connection heating and cooling power supply provided by the present invention;

Fig. 5 is a comparative table of economic benefits of the park multi-energy complementary mode provided by the present invention.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

Figure 1 is a low-carbon energy-saving method and system for multi-energy complementary adjustment provided by the present invention, wherein the method includes: if the load is less than the total output power of renewable energy in the micro-grid, the micro-grid is powered by controlling the energy storage converter And charge the energy storage system; when the energy storage system is full, the microgrid will transmit excess electric energy to the large grid, or supply power to the adjustable load; if the load is greater than the total output power of renewable energy in the microgrid, by controlling the energy storage The converter enables the energy storage system to discharge and supply power; if the energy storage system cannot continue to discharge, the microgrid absorbs power from the large grid for power supply, or cuts off the adjustable load, and starts non-renewable energy generation to ensure the power supply of the microgrid. Reduce electricity costs for railways or parks, provide personalized energy use solutions, improve energy application operation efficiency and equipment utilization rate; improve renewable energy consumption level; Capacity occupied. Railway power supply is an important part of ensuring railway transportation. The low-carbon technology that uses a variety of energy complementary adjustments maximizes the reliability of power supply and greatly reduces carbon emissions.

For a specific solution, the embodiment of the present invention adopts the grid-connected mode and the isolated grid mode to explain respectively.

In the grid-connected mode, the voltage and frequency of the micro-grid in places such as railways or parks are determined by the large power grid. The application of energy storage mainly plays the role of energy balance regulation, realizes the dynamic balance of energy within the microgrid, and maximizes the use of renewable energy. At this time, wind turbines, photovoltaics and other renewable energy power generation adopt constant power control to perform maximum power tracking.

The specific strategy is: when the load is less than the total output power of renewable energy generation in the micro-grid, the micro-grid charges the battery by controlling the energy storage converter until the battery is fully charged, and the micro-grid transmits excess power to the large grid; otherwise, When the load is greater than the total output power of renewable energy generation in the microgrid, the battery is discharged by controlling the energy storage converter until the battery can no longer be discharged, and the microgrid absorbs part of the electric energy from the large grid. It is also possible to use the tiered electricity price, and use the grid to charge the battery when the electricity price is the lowest, effectively reducing the cost of electricity for railways.

Another important role of energy storage applications is to quickly adjust power, effectively reducing the impact of wind power, photovoltaic and other renewable energy output power fluctuations on large power grids and loads, thereby ensuring safe operation of large power grids and reliable power supply for loads.

In the isolated grid mode: different from the grid-connected mode, the adjustment of power gap and frequency must be completed by each micro power supply, energy storage system and control module in the microgrid. Therefore, it is necessary to achieve optimal application economy, highest power supply reliability, The energy dispatch target with optimal energy storage distribution must flexibly adjust the feeder power flow in the microgrid, adjust the voltage at each micropower interface, and ensure voltage stability.

(1) Power storage converter (PCS): The power storage converter can realize the AC-DC conversion between the battery and the grid, complete the two-way energy flow between the two, and realize the charge and discharge management of the battery system through advanced control strategies, Battery energy storage system charging and discharging power control and off-grid two operating mode switching functions.

(2) High power density and large-capacity energy storage batteries: lithium-ion batteries and supercapacitors are generally used for energy storage system batteries. They have the advantages of long cycle life, high charge and discharge rate, no memory effect, high temperature resistance, large capacity, and environmental protection. Technical parameters such as rated capacity, rated charge and discharge power, cycle life, and series-parallel connection of battery packs for energy storage batteries can be customized and configured according to specific application requirements.

(3) Battery management system (BMS): The battery management system is a secondary device that monitors, predicts, and protects the battery of the battery energy storage unit. The battery management system detects information such as the voltage, current, temperature, and SOC of the battery. Real-time evaluation of the status of the battery energy storage unit, and upload the information to the status monitoring system and energy management system, to avoid damage or even safety accidents caused by improper use or various failures of the battery energy storage unit, which is the main guarantee for the safe operation of the battery energy storage unit. The battery management system is mainly composed of the following equipment units: battery management module (BMU), battery pack control unit (GCU), system management unit (SMU) and charge/discharge protection unit.

The energy storage system can provide comprehensive battery information management, online SOC monitoring, system protection, thermal management, self-fault diagnosis and fault tolerance, flexible modular design and other functions according to needs.

Main functions: Energy storage on the power generation side: load regulation, smoothing intermittent energy, improving new energy consumption, increasing power grid reserve capacity, and participating in frequency regulation. Power transmission and distribution energy storage: improve power quality, reduce line loss, increase the reserve capacity of the power grid, improve the utilization efficiency of power transmission and distribution equipment, and delay the need for capacity increase. User-side energy storage: smooth load curve, load transfer, peak shaving and valley filling. Emergency power supply: It is in a standby state when the power grid is normal, and it can be started when the power grid fails to ensure the continuous power supply of the load.

Among them, renewable energy includes one or more of photovoltaic power generation, wind power generation or hydropower generation; the large power grid is formed by generating power from non-renewable energy, and non-renewable energy includes one or more of nuclear power, gas power generation or coal power generation. As shown in Figure 4, the triple supply of cooling, heating and power belongs to distributed energy. Compared with the traditional centralized power supply, distributed energy refers to the small-scale, small-capacity (kW to 15MW) and module-based power generation system. It is a system that can independently output electricity, heat and cold energy, and is arranged near users in a decentralized and distributed manner. The natural gas enters the gas-fired internal combustion engine for combustion, drives the generator to generate electricity, and the gas and cylinder liner cooling water produced by the generator provide cooling or heat through the flue gas hot water type waste heat machine. The heating monitoring system uses sensing technology, data communication technology, measurement and control technology and heating network monitoring technology, and adopts the mode of remote meter reading and automatic metering to realize real-time monitoring and automatic management of the heating system. The refrigeration system mainly includes refrigeration hosts, refrigeration units, cooling towers, ice storage tanks, ice-melting cooling plates and other devices. The waste heat of gas enters the refrigeration hosts, and the cold air generated is distributed to office buildings through a series of processes such as cooling towers and refrigeration units. , canteen restaurant and workshop. The refrigeration system conducts real-time monitoring and control of each link of refrigeration and the operating status of the device to ensure the safe and stable operation of the entire refrigeration system.

A more specific solution mainly completes the signal collection of power generation, cold storage, heat storage, water supply, chemical water treatment, ventilation, pipe network and other processes through the temperature sensor, flow transmitter, pressure switch, regulating valve, and field bus configured on site. And control, in order to realize the remote monitoring of the triple supply application of cooling, heating and power. Realize the signal acquisition functions of power supply and distribution remote signaling, remote control, remote measurement, and remote adjustment, and carry out logic control on the grid connection between the generator set and the mains, and control the outlet switch of the generator set, the low-voltage side switch of the transformer, and the acquisition switch according to the selected operation mode Status and operating parameters of generator sets, to realize local and remote monitoring of power distribution and grid-connected systems. Multiple automatic protection, high and low voltage protection, overheating and overload protection, phase sequence protection, water flow switch protection, pressure switch protection. Humanized design, the operating status of the unit is clear at a glance, and it has a fault self-diagnosis function. Absorb a large amount of free heat in the air for heating, which can save 70% of energy consumption.

The specific plan is to first set the bidirectional converter to the voltage/frequency mode, and establish the reference voltage and frequency of the microgrid. At this time, the energy is mainly provided by the energy storage system (battery); The power grid dispatching control system enters the background cycle dispatching mode, and continuously monitors the output power and load power of micro-sources (wind power and photovoltaic systems).

If the output power of the micro-source is greater than the load power, that is, when the load is less than the total output power of renewable energy generation in the micro-grid, first check whether the gas generator has been started, and stop its work if it is started. Here the gas generator corresponds to the large power grid and transmits electricity to the large power grid through the gas generator. If the output power of the micro-source is still greater than the load power, charge the energy storage system until the charging upper limit is reached, and then start the adjustable load, and supply power to the adjustable load through the micro-grid. Here, the adjustable load is a removable load, which is not necessary. The terminal to be turned on.

If it is detected that the output power of the micro-source is less than the load power, that is, when the load is greater than the total output power of renewable energy generation in the micro-grid, first check whether there is an adjustable load that can be removed, and if so, remove it (that is, if there is a load that can be removed, then cut off), if not, start the energy storage system to discharge until the discharge lower limit is reached, and then start the backup power gas generator to ensure the power supply of the microgrid.

The preferred solution, multi-energy complementary technology is based on tiered electricity prices, and rationally allocates power generation and consumption in railways or parks, so that multi-energy complementary operating companies can maximize their profits. The multi-energy complementary mechanism is mainly reflected in the following aspects:

(1) Ladder power multi-energy complementarity: by charging the energy storage system when the electricity price of the large grid is low; Power generation, effectively reducing the cost of electricity in the park.

As shown in Figure 5, the red part of the table indicates that all the power consumption of the park comes from the large power grid. The negative number in the energy storage indicates that the energy storage system is charging, and the positive number indicates that the energy storage system is discharging; the photovoltaic power generation time is: 9:00-18:00; energy storage discharge time: 11:00-14:00, charging time: 0:00-3:00.

The time period of the first-tier ladder electricity price of the large power grid: 0:00-6:00, 23:00-0:00; price: 0.38 yuan/kWh; the second-tier electricity price period: 6:00-10:00, 15:00-18 :00, 21:00-23:00; price: 0.84 yuan/kWh; three-level ladder electricity price period: 10:00-15:00, 18:00-21:00; price: 1.32 yuan/KWh.

The calculation formula is: large power grid electricity fee expenditure = first-tier electricity price * first-tier electricity price total electricity fee period + second-tier electricity price * second-tier electricity price total electricity fee period + third-tier electricity price * third-tier electricity price total electricity fee period .

Through the comparison of electricity expenses under the two modes, after the park adopts the multi-energy complementary energy efficiency management application, the electricity purchase cost is reduced by about half, and the multi-energy complementary company can obtain certain profits from it.

(2) Smooth distributed energy output through multi-energy complementarity: the sun is covered by clouds at noon, and the output of photovoltaic power generation drops instantaneously, which affects the stability of power supply. At this time, the energy storage system will replenish and smooth the power output.

(3) Peak shaving and valley filling: When the low power consumption period comes, the microgrid is powered and charged to the energy storage system by controlling the energy storage converter. Grid powered. The power load is low at night and high during the day, resulting in large fluctuations in the power supply of the large power grid. Through energy storage, controlled by multi-energy complementary applications, the excess power at night can be stored, and the stored power can be released during peak power consumption during the day to achieve peak shaving and valley filling.

(4) Mitigate the impact of charging piles on the grid and charge economically: DC charging piles instantly cause a large impact on the grid, and through energy storage output, it can effectively solve the problem of instantaneous power load increase of DC charging piles.

Beneficial effects: reduce the cost of electricity for railways or industrial parks, provide personalized energy consumption solutions, improve application operation efficiency and equipment utilization; improve the level of renewable energy consumption; save energy and reduce emissions, and be green and environmentally friendly; Network capacity usage. Railway power supply is an important part of ensuring railway transportation. The low-carbon technology that uses a variety of energy sources to complement each other can maximize the reliability of power supply and greatly reduce carbon emissions.

The present invention also provides a low-carbon energy-saving system for multi-energy complementary regulation. energy system;

If the load is less than the total output power of renewable energy generation in the micro-grid, the micro-grid supplies power and charges the energy storage system by controlling the energy storage converter; when the energy storage system is full, the micro-grid transmits excess power to the large grid. or power an adjustable load;

If the load is greater than the total output power of renewable energy generation in the microgrid, the energy storage system is discharged and supplied by controlling the energy storage converter; if the energy storage system cannot continue to discharge, the microgrid absorbs power from the large grid for power supply, or cuts off the adjustable load , start non-renewable energy generation to ensure microgrid power supply.

Please refer to FIG. 2 , which is a schematic diagram of an embodiment of an electronic device provided by an embodiment of the present invention. As shown in Figure 2, the embodiment of the present invention provides an electronic device, including a memory 1310, a processor 1320, and a computer program 1311 stored in the memory 1310 and operable on the processor 1320, and the processor 1320 executes the computer program 1311 When the load is less than the total output power of renewable energy generation in the micro-grid, the micro-grid supplies power and charges the energy storage system by controlling the energy storage converter; when the energy storage system is full, the micro-grid supplies power to the large grid. Deliver excess electrical energy, or power adjustable loads;

If the load is greater than the total output power of renewable energy generation in the microgrid, the energy storage system is discharged and supplied by controlling the energy storage converter; if the energy storage system cannot continue to discharge, the microgrid absorbs power from the large grid for power supply, or cuts off the adjustable load , start non-renewable energy generation to ensure microgrid power supply.

Please refer to FIG. 3 , which is a schematic diagram of an embodiment of a computer-readable storage medium provided by the present invention. As shown in Figure 3, this embodiment provides a computer-readable storage medium 1400, on which a computer program 1411 is stored, and when the computer program 1411 is executed by a processor, the following method is implemented: if the load is less than the renewable energy in the microgrid The total output power of power generation, through the control of the energy storage converter, the microgrid supplies power and charges the energy storage system; when the energy storage system is full, the microgrid transmits excess power to the large grid or supplies power to adjustable loads;

If the load is greater than the total output power of renewable energy generation in the microgrid, the energy storage system is discharged and supplied by controlling the energy storage converter; if the energy storage system cannot continue to discharge, the microgrid absorbs power from the large grid for power supply, or cuts off the adjustable load , start non-renewable energy generation to ensure microgrid power supply.

It should be noted that, in the foregoing embodiments, descriptions of each embodiment have their own emphases, and for parts that are not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (10)

1. The low-carbon energy-saving method for complementary adjustment of multiple energy sources is characterized by comprising the following steps of:

if the load is smaller than the sum of the renewable energy source power generation output power in the micro-grid, the micro-grid is powered and charged to the energy storage system by controlling the energy storage converter; when the energy storage system is full, the micro-grid only transmits redundant electric energy to the large power grid or supplies power to the adjustable load;

if the load is greater than the sum of the renewable energy source power generation output power in the micro-grid, the energy storage system is enabled to discharge and supply power by controlling the energy storage converter; if the energy storage system can not continue discharging, the micro-grid absorbs electric energy from the large power grid to supply power, or the adjustable load is cut off, and the non-renewable energy source is started to generate power so as to ensure the micro-grid to supply power.

2. The multi-energy complementarily tuned low carbon energy conservation method of claim 1, wherein the renewable energy generation is stored to the lithium iron phosphate battery by configuring a customized Battery Management System (BMS) and the lithium iron phosphate battery is grid-connected to a large grid or island operation.

3. The multi-energy complementarily conditioned low carbon energy conservation method of claim 2, wherein the renewable energy source comprises one or more of photovoltaic power generation, wind power generation, or hydro power generation; the large power grid is formed by generating electricity from non-renewable energy sources including one or more of nuclear, gas-fired or coal-fired.

4. The low-carbon energy-saving method for complementary adjustment of multiple energy sources according to claim 1, wherein the on-site environment of renewable energy source power generation is monitored and displayed in real time, daily power generation of each inverter is collected and displayed, the real-time power generation and the historical power generation are compared and analyzed, and the fluctuation condition of the photovoltaic power generation along with the on-site environment is obtained; the site environment comprises sunlight intensity, ambient temperature and wind speed.

5. The low-carbon energy-saving method for complementary adjustment of multiple energy sources according to claim 4, wherein the photovoltaic confluence acquisition device, the direct current detection instrument and the power quality analyzer are respectively applied to the confluence box, the direct current cabinet and the alternating current cabinet aiming at the requirement of power parameter detection of each link of photovoltaic power generation, so as to acquire, monitor, control and adjust the operation parameters and state data of the photovoltaic cells, the confluence box, the direct current cabinet, the inverter and the alternating current cabinet, thereby improving the efficiency of a power generation system.

6. The multi-energy complementarily-regulated low-carbon energy-saving method according to claim 1, wherein the energy storage system is charged when the price of electricity of the large power grid is low; and when the price of the large power grid is high, the energy storage system is discharged for use in the park.

7. The multi-energy complementarily adjusted low-carbon energy-saving method according to claim 1, wherein when the renewable energy source power generation output power is reduced, the energy storage system is started to discharge to assist in matching with the micro-grid power supply;

when the electricity consumption period is in the valley period, the energy storage converter is controlled to enable the micro-grid to supply power and charge the energy storage system, and when the electricity consumption period is in the peak period, the energy storage system is started to discharge to assist in matching with the micro-grid to supply power.

8. A low-carbon energy-saving system with complementary adjustment of multiple energy sources, which is characterized in that the system is used for realizing the low-carbon energy-saving method with complementary adjustment of the multiple energy sources according to any one of claims 1 to 7, and comprises a large power grid, a micro power grid, an energy storage converter and an energy storage system;

if the load is smaller than the sum of the renewable energy source power generation output power in the micro-grid, the micro-grid is powered and charged to the energy storage system by controlling the energy storage converter; when the energy storage system is full, the micro-grid only transmits redundant electric energy to the large power grid or supplies power to the adjustable load;

if the load is greater than the sum of the renewable energy source power generation output power in the micro-grid, the energy storage system is enabled to discharge and supply power by controlling the energy storage converter; if the energy storage system can not continue discharging, the micro-grid absorbs electric energy from the large power grid to supply power, or the adjustable load is cut off, and the non-renewable energy source is started to generate power so as to ensure the micro-grid to supply power.

9. An electronic device comprising a memory, a processor for implementing the steps of the multi-energy complementarily tuned low-carbon power saving method according to any of claims 1-7 when executing a computer management class program stored in the memory.

10. A computer readable storage medium, having stored thereon a computer management class program which when executed by a processor performs the steps of the multi-energy complementarily tuned low carbon energy conservation method according to any one of claims 1 to 7.