CN115313521A - Intelligent energy comprehensive regulation and control system and method - Google Patents
Intelligent energy comprehensive regulation and control system and method Download PDFInfo
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- CN115313521A CN115313521A CN202211141596.8A CN202211141596A CN115313521A CN 115313521 A CN115313521 A CN 115313521A CN 202211141596 A CN202211141596 A CN 202211141596A CN 115313521 A CN115313521 A CN 115313521A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
- H02J3/144—Demand-response operation of the power transmission or distribution network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
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Abstract
The invention discloses a comprehensive intelligent energy regulation and control system and a regulation and control method, wherein the comprehensive intelligent energy regulation and control system comprises an energy regulation and control system (11), a photovoltaic system (12), an energy storage system (13), a charging pile (14), a load (15) and a public power grid (16). The regulation and control method of the intelligent energy comprehensive regulation and control system disclosed by the invention performs cascade distribution, multi-energy complementation, peak clipping and valley filling aiming at the power consumption of the whole industrial park, promotes the comprehensive interaction between a power grid and a demand side, and realizes the optimal operation of the power grid.
Description
Technical Field
The invention belongs to the technical field of energy management, and particularly relates to an intelligent energy comprehensive regulation and control system and a regulation and control method.
Background
Energy is the basis of sustainable development of economic society, high efficiency, cleanness and low carbon become the mainstream direction of world energy development, and the development of renewable energy such as wind energy, solar energy and the like is an important strategic measure for adjusting energy structures and realizing energy conservation and emission reduction in China. The country highly attaches importance to the development of new energy power generation and energy storage technologies, and takes the support of new energy development as a major strategic measure for implementing the national energy strategy, the emerging industry of the service strategy and promoting the change of economic development modes;
along with the increase of the country to the distributed energy introduction policy support strength of industrial park, the demand that the relevant operation mode of wisdom energy can not be satisfied to traditional distributed photovoltaic, distributed energy storage, the direct access garden distribution network of electric pile has been filled. For example, in the power utilization of an industrial park, the existing technology, namely the technology of directly accessing a distributed power supply to the park energy regulation and control is not perfect enough, the park power utilization has insecurity and instability, the energy regulation and control cannot be refined, the regulation and control precision is not high, the speed is not fast enough, the energy utilization efficiency cannot be maximized, the economic benefit cannot be maximized, and the existing control technology cannot adapt to the adjustment of related energy policies.
Disclosure of Invention
In order to solve the problem in the prior art, the invention provides an intelligent energy comprehensive regulation and control system and a regulation and control method.
The intelligent energy comprehensive regulation and control system integrates a distributed photovoltaic power supply, an energy storage device, an energy conversion device, a load, a monitoring device and a protection device. The method has the advantages that the power utilization of the whole industrial park is subjected to step distribution, multi-energy complementation and peak clipping and valley filling, comprehensive interaction between a power grid and a demand side is promoted, optimal operation of the power grid is realized, the development of an energy efficiency management industry is driven, the social energy efficiency level is improved, and a long-acting operation mechanism of energy management is formed.
According to one aspect of the invention, the invention provides an intelligent energy comprehensive regulation and control system which comprises an energy regulation and control system 11, a photovoltaic system 12, an energy storage system 13, a charging pile 14, a load 15 and a public power grid 16. The system comprises a photovoltaic system 12, an energy storage system 13, a charging pile 14 and a load 15, wherein the photovoltaic system 12 is used for photovoltaic power generation, the energy storage system 13 is used for storing electric quantity, the charging pile is used for charging a battery of electric equipment, and the load 15 is other electric equipment except the charging pile; the photovoltaic system 12, the energy storage system 13, the charging pile 14 and the load 15 form a micro power grid, and the micro power grid and a public power grid are subjected to intelligent complementary regulation and control of electric energy through regulation and control of the energy regulation and control system 11 according to specific power consumption requirements.
According to another aspect of the invention, the invention also provides a regulation and control method of the intelligent energy comprehensive regulation and control system, which comprises the following steps:
step 1: the photovoltaic system 12 starts to work, if the energy storage system 13 is charged, the charging pile 14 starts to work, and the load 15 normally works at the moment, when the energy regulation and control system 11 detects that the generating power of the photovoltaic system 12 cannot meet the power required by the normal work of the energy storage system 13, the charging pile 14 and the load 15, the energy regulation and control system 11 regulates and controls the public power grid 16 to charge the energy storage system 13, and the charging pile 14 and the load 15 supplement energy for use.
Step 2: the photovoltaic system 12 starts to work, if the energy storage system 13 discharges, the charging pile 14 starts to work, and the load 15 works normally, when the energy regulation and control system 11 detects that the sum of the power generation power of the photovoltaic system 12 and the discharge power of the energy storage system 13 cannot meet the power required by the normal work of the charging pile 13 and the load 15, the energy regulation and control system 11 regulates and controls the public power grid 16 to supplement energy for use.
And step 3: the photovoltaic system 12 starts to work, if the energy storage system 13 is charged, the charging pile 14 starts to work, and the load 15 works normally, when the energy regulation and control system 11 detects that the generating power of the photovoltaic system 12 is larger than the power required by the normal work of the energy storage system 13, the charging pile 14 and the load 15, the energy regulation and control system 11 feeds back part of residual electricity, of which the generating power of the photovoltaic system 12 is larger than the sum of the power required by the normal work of the energy storage system 13, the charging pile 14 and the load 15, to the public power grid 16.
And 4, step 4: the photovoltaic system 12 starts to work, if the energy storage system 13 discharges, the charging pile 14 starts to work, and the load 15 works normally, when the energy regulation and control system 11 detects that the generating power of the photovoltaic system 12 is larger than the power required by the normal work of the charging pile 14 and the load 15, the energy regulation and control system 11 controls the energy storage system 13 to stop discharging, and part of residual electricity, of which the generating power of the photovoltaic system 12 is larger than the sum of the power required by the normal work of the charging pile 14 and the load 15, is fed back to the public power grid 16.
Further, according to the power consumption requirement of the park, the power consumption requirement is distributed into primary power consumption, secondary power consumption and tertiary power consumption according to the grade; wherein, the first-level power consumption means that: the electricity consumption requirement is important, and the electricity can not be cut off at any time; the secondary power utilization means that: the electricity consumption requirement is general, and the electricity can be selectively cut off according to the requirement; the three-level requirements mean: the power consumption is secondary, and the power can be cut off at any time.
Further, the rated capacity of the main transformer in the park is S X The actual usable capacity S X1 ＝S X X is 0.95; the subordinate power utilization grades of the main transformer are the primary power utilization grade, the secondary power utilization grade and the tertiary power utilization grade; wherein the primary power consumption has a capacity of S 1 (ii) a The secondary power consumption has a capacity of S 2 (ii) a The capacity of three-level power utilization is S 3 ；
The power generation capacity of the connected photovoltaic system 12 is S Photovoltaic system (ii) a The charging capacity of the connected energy storage system 13 is S Energy storage (ii) a The capacity of the charging pile 14 is S Charging pile (ii) a The compensation capacity of the connected public power network 15 is S Power grid compensation ；
The regulation and control method of the intelligent energy comprehensive regulation and control system is further executed according to the following rules:
1. when the energy regulation and control system 11 detects that the generating capacity of the photovoltaic system 12 is stable, the maximum capacity value S of the electric load of the park Maximum load Satisfying the following expression (1):
S maximum load ＝S Photovoltaic system -S Energy storage -S Charging method and apparatusPile and its making method +S X1 (1)
2. When the energy regulation and control system 11 detects that the generated energy of the photovoltaic system 12 is reduced, the intelligent energy comprehensive regulation and control system sets S Energy storage 、S Charging pile The required capacity is unchanged;
the generating capacity of the photovoltaic system 12 is reduced to S Photovoltaic 1 The maximum capacity value S of the power load of the park at the moment Maximum load 1 Satisfying the following expression (2):
S maximum load 1 ＝S Photovoltaic 1 -S Energy storage -S Charging pile +S X1 (2)
The energy regulation and control system 11 regulates and controls electric quantity from the public power grid 16 to compensate the electric quantity S to the micro power grid Power grid compensation (ii) a Satisfying the following expression (3):
S maximum load ＝S Maximum load 1 +S Power grid compensation (3)
3. Energy regulation and control system 11 regulation and control compensation S Power grid compensation Then, the rated capacity of the main transformer satisfies the following expression (4):
S X2 ＝S X1 +S power grid compensation (4)
4. When the energy regulation and control system 11 monitors S X2 ≥S X1 And the duration is more than or equal to 3S, and the power is cut off sequentially according to the control instruction issued by the energy regulation and control system 11 and the level of the electricity utilization importance degree from the order of the third-level electricity utilization and the second-level electricity utilization until the following expression (5) is met:
S maximum load ＜S X (5)。
Drawings
Fig. 1 is a schematic diagram illustrating a comprehensive intelligent energy regulation system and a regulation method according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive efforts based on the embodiments of the present invention, are within the scope of protection of the present invention. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention provides a comprehensive intelligent energy regulation and control system and a regulation and control method. The power utilization of the whole industrial park is subjected to cascade distribution, multi-energy complementation is realized, peak clipping and valley filling are realized, the comprehensive interaction between the power grid and a demand side is promoted, and the optimal operation of the power grid is realized.
Taking a power supply system of a certain industrial park as an example, in order to meet different power consumption requirements, a plurality of main transformers are generally required to be configured in the industrial park, wherein the main transformers comprise a first main transformer, a second main transformer 2 \8230, an Nth main transformer N and the like; taking the first main transformer as an example, for the convenience of illustration, the first main transformer is abbreviated as ZB1, and its rated capacity is S ZB1 Its actual usage capacity is SZ B2 ；
In addition, the industrial park needs to be provided with a plurality of distribution transformers, comprises a first distribution transformer a second distribution transformer (8230) \\8230, an Nth distribution transformer, etc.; for convenience of explanation, the first distribution transformer will be referred to as PB1 for short, and its rated capacity is S PB1 ；
Finally, in the electricity utilization process, in order to measure the electricity consumption of different loads, a plurality of multifunctional electricity meters need to be configured for a plurality of loads of the industrial park respectively, such as a first multifunctional electricity meter, a second multifunctional electricity meter, a meter for 8230, a meter for N, and the like; hereinafter, a first multifunctional electric meter of a certain load configuration is taken as an example, and for convenience of description, it is simply referred to as DB1.
During the power supply process, since each transformer is limited by its rated capacity, there are several hazards if there is over-capacity. The method comprises the following specific steps:
1. the transformer runs in an overload mode, so that interphase short circuit of the transformer occurs to cause the transformer to be burnt;
2. the whole power system is broken down, and large-area power failure is caused;
3. the transformer area is overloaded to operate, and the voltage at the tail end of the transformer area is reduced, so that part of peripheral user electrical equipment cannot be started to operate.
In view of the above hazards, it is necessary to ensure that the rated capacity of the transformer is not exceeded during the entire charging and discharging process.
In the power utilization of the industrial park, a photovoltaic system and an energy storage system are also connected into the industrial park in order to reduce the dependence on a public power grid and reduce the power utilization cost; the photovoltaic system can realize spontaneous self-use; the energy storage system can realize peak clipping and valley filling. In addition, access photovoltaic system and energy storage system to carry out the energy regulation and control simultaneously, still further guaranteed to guarantee industrial park power consumption stability and security, improve the utilization efficiency of the energy.
As shown in fig. 1, the comprehensive intelligent energy regulation and control system provided by the present invention includes an energy regulation and control system 11, a photovoltaic system 12, an energy storage system 13, a charging pile 14, a load 15, and a public power grid 16. The photovoltaic system 12, the energy storage system 13, the charging pile 14 and the load 15 form a micro power grid, and the micro power grid and a public power grid are subjected to intelligent complementary regulation and control of electric energy through regulation and control of the energy regulation and control system 11 according to specific power consumption requirements.
In the power utilization process of the industrial park, the power utilization process can be divided into a flat valley time period and a peak time period, specifically, in the flat valley time period, the power utilization requirement in the park is less, and at the moment, the energy storage system 13 is charged to store redundant electric quantity; and during peak hours, i.e. peak hours when electricity is used, the electricity stored in the energy storage system 13 is fed back to the park grid.
However, in the above charging and discharging processes, it is necessary to ensure that the rated capacity of the transformer is not exceeded. In the present invention, the actual capacity of the transformer is set to 90% of the rated capacity.
In the charging and discharging process, it is required to ensure that the charging and discharging power of the photovoltaic system 12, the energy storage system 13, the charging pile 14 and the load 15 does not exceed 90% of the rated capacity of the main transformer in the park, namely S X X 0.9. Assuming that the user load power is X, at the time of charging the energy storage system 13 by using the photovoltaic system 12 and the public power grid 16 during the flat period and the low-peak period (with the province of peak-valley price difference), the charging and discharging power of the energy storage system 13 is divided into the following cases:
the planned power curve P = X, the actual capacity of the transformer is calculated as 0.9 × rated capacity.
1. In the flat valley period: charging the energy storage system 13;
the actual charging power of the energy storage system can be divided into the following types:
DB 1 active power P of DB1 ＝S ZB1 ×0.9-S ZB2 ；
(1-1) when P DB1 ＞X；P DB1 ＜S PB1 When X is 0.9-X, the energy storage system 13 is charged with power X;
(1-2) when P DB1 ＞X；P DB1 ＞S PB1 X0.9-X, the energy storage system 13 is S PB1 ×0.9-P DB1 Charging is carried out;
(1-3) when P DB1 ＜X；P DB1 ＞S PB1 X0.9-X, energy storage system 13 with power min [ (S) PB1 ×0.9-P DB1 )，(S ZB1 ×0.9-S ZB2 ) Charging is performed;
(1-4) when P DB1 ＜X；P DB1 ＜S PB1 X0.9-X, the energy storage system 13 is S ZB1 ×0.9-S ZB2 Charging is carried out;
2. in the peak period: the energy storage system 11 discharges;
(2-1) when P DB1 At > X, the energy storage system 13 discharges with P = X;
(2-2) when 1/25 XX < P DB1 < X, the discharge power of the energy storage system 13 is defined as: 0.95 XP DB1 ；
(2-3) when P DB1 And when the voltage is less than 1/25 multiplied by X, the energy storage system 13 is in standby.
When the intelligent energy comprehensive regulation and control system provided by the invention is used for energy regulation and control, the photovoltaic system 12, the energy storage system 13, the charging pile 14 and the load 15 form a micro power grid, and the micro power grid and a public power grid are subjected to intelligent complementary regulation and control of electric energy through regulation and control of the energy regulation and control system 11 according to specific power consumption requirements.
The specific method of energy regulation is described in detail below, as shown in fig. 1:
(1) The photovoltaic system 12 starts to work, if the energy storage system 13 is charged, the charging pile 14 starts to work, and the load 15 normally works at the moment, when the energy regulation and control system 11 detects that the generating power of the photovoltaic system 12 cannot meet the power required by the normal work of the energy storage system 13, the charging pile 14 and the load 15, the energy regulation and control system 11 regulates and controls the public power grid 16 to charge the energy storage system 13, and the charging pile 14 and the load 15 supplement energy for use.
(2) The photovoltaic system 12 starts to work, if the energy storage system 13 discharges, the charging pile 14 starts to work, and the load 15 works normally, when the energy regulation and control system 11 detects that the sum of the power generation power of the photovoltaic system 12 and the discharge power of the energy storage system 13 cannot meet the power required by the normal work of the charging pile 13 and the load 15, the energy regulation and control system 11 regulates and controls the public power grid 16 to supplement energy for use.
(3) The photovoltaic system 12 starts to work, if the energy storage system 13 is charged, the charging pile 14 starts to work, and the load 15 works normally, when the energy regulation and control system 11 detects that the generating power of the photovoltaic system 12 is larger than the power required by the normal work of the energy storage system 13, the charging pile 14 and the load 15, the energy regulation and control system 11 feeds back part of residual electricity, of which the generating power of the photovoltaic system 12 is larger than the sum of the power required by the normal work of the energy storage system 13, the charging pile 14 and the load 15, to the public power grid 16.
(4) The photovoltaic system 12 starts to work, if the energy storage system 13 discharges, the charging pile 14 starts to work, and the load 15 works normally, when the energy regulation and control system 11 detects that the generating power of the photovoltaic system 12 is larger than the power required by the normal work of the charging pile 14 and the load 15, the energy regulation and control system 11 controls the energy storage system 13 to stop discharging, and part of residual electricity, of which the generating power of the photovoltaic system 12 is larger than the sum of the power required by the normal work of the charging pile 14 and the load 15, is fed back to the public power grid 16.
In addition, in the power consumption requirements of the industrial park, the power consumption requirements are distributed into primary power consumption, secondary power consumption and tertiary power consumption according to grades;
wherein, the first grade power consumption means: the electricity consumption requirement is important, and the electricity can not be cut off at any time; the secondary power utilization means that: the electricity consumption requirement is general, and the electricity can be selectively cut off according to the requirement; the three-level requirements mean: the power can be cut off at any time when the power consumption is secondary;
the electricity importance degree of the industrial park users is distributed in sequence according to the electricity demand grades.
Take a main transformer in a park as an example, and the rated capacity is S X The actual usable capacity S X1 ＝S X ×0.95；
The main transformer has subordinate power utilization levels, i.e. primary power utilization, secondary power utilization and tertiary power utilization, wherein the capacity of the primary power utilization is S 1 (ii) a The capacity of secondary power utilization is S 2 (ii) a The capacity of three-level power utilization is S 3 ；
The power generation capacity of the connected photovoltaic system 12 is S Photovoltaic system (ii) a The charging capacity of the connected energy storage system 13 is S Energy storage (ii) a The capacity of the charging pile 14 is S Charging pile (ii) a The compensation capacity of the connected public power network 15 is S Power grid compensation ；
1. When the energy regulation and control system 11 detects that the solar illumination is stable, namely the generated energy of the photovoltaic system 12 is stable, the maximum capacity value S of the electric load of the park Maximum load As follows:
S maximum load ＝S Photovoltaic system -S Energy storage -S Charging pile +S X1 ；
2. When the energy regulation and control system 11 detects that the solar illumination is changed from stable to unstable, namely that the power generation amount of the photovoltaic system 12 is reduced, S Energy storage 、S Charging pile The required capacity is unchanged; s. the Photovoltaic system The power generation capacity is decreased to S Photovoltaic 1 And the maximum capacity value S of the power load of the park at the moment Maximum load 1 As follows:
S maximum load 1 ＝S Photovoltaic 1 -S Energy storage -S Charging pile +S X1 ；
But to ensure S Maximum load Invariably, the energy management system 11 is then required to regulate and compensate for the capacity, i.e., S, dropped by the photovoltaic system 12 from the utility grid 16 Power grid compensation Thereby reaching S Maximum load Keeping the original shape; at this time S Maximum load ＝S Maximum load 1 +S Power grid compensation ；
At this time with S Power grid compensation Will become:
S X2 ＝S X1 +S power grid compensation
At this time, S will appear X2 ＞S X In case of (2), the main transformer can run in overload to cause tripping;
to avoid the above situation, when the energy regulation and control system 11 monitors S X2 ≥S X1 And the duration is more than or equal to 3S, and the power is cut off sequentially according to the control instruction issued by the energy regulation and control system 11 and the level of the electricity utilization importance degree by the sequence of the third-level electricity utilization and the second-level electricity utilization until the following conditions are met: s Maximum load ＜S X To ensure that the transformer does not run in overload.
Through the description, the distributed power sources, the power loads and the introduced charging piles in the industrial park are controlled in a unified mode, the distributed power sources in the park are perfected, the multi-energy complementation is achieved, the energy conversion efficiency is improved, the safety and the stability of the power utilization of the park are guaranteed and standardized, the specific power utilization control gateway is further controlled, and the safety and the reliability of the power utilization of the park are guaranteed. Meanwhile, the regulation and control method provided by the invention can be well adapted to the uncertainty of the future energy policy, and can be changed adaptively along with the adjustment of the energy policy.
Compared with the prior art, the distributed photovoltaic direct access distribution network of prior art, the operational mode is single, and is relatively poor to energy policy adaptability, mainly reflects in:
1. for a park with photovoltaic self-generation and self-utilization, the photovoltaic can not be on the internet, and if the load of the park can not absorb the photovoltaic power, the grid-connected switch can be cut off only, so that the power generation loss is caused, and the economic benefit is directly influenced. If the policy in the region is changed into surplus power for surfing the internet, equipment needs to be modified, and the modification cost becomes a factor influencing economic benefits.
2. For the distributed energy storage of the park, only the peak clipping and valley filling functions are achieved, the change of the load of the whole park cannot be sensed, the load of the park is increased due to the charging of the stored energy, and certain uncertainty is brought to a main distribution network of the park.
The intelligent energy comprehensive regulation and control system provided by the invention solves the problems, and the energy management system 11 can switch in real time whether the regional distributed photovoltaic is self-generating and self-generating, the surplus power is on line or the full-amount power is on line, so that the later-stage modification cost is saved.
Meanwhile, the coordination control method of the invention lists all distributed power supplies, power loads and charging pile running states in the garden in a monitoring position, so that multi-energy complementation is realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. An intelligent energy comprehensive regulation and control system; the method is characterized in that: the intelligent energy comprehensive regulation and control system comprises an energy regulation and control system (11), a photovoltaic system (12), an energy storage system (13), a charging pile (14), a load (15) and a public power grid (16); the photovoltaic system (12) is used for photovoltaic power generation, the energy storage system (13) is used for storing electric quantity, the charging pile (14) is used for charging a battery of the equipment, and the load (15) is other electric equipment except the charging pile.
2. The system of claim 1, wherein the system comprises: the photovoltaic system (12), the energy storage system (13), the charging pile (14) and the load (15) form a micro power grid, and the micro power grid and the public power grid (16) are subjected to intelligent complementary regulation and control of electric energy through regulation and control of the energy regulation and control system (11) according to specific power consumption requirements.
3. The method as claimed in claim 1, wherein the intelligent energy comprehensive regulation system comprises: the intelligent energy comprehensive control system comprises the intelligent energy comprehensive control system as claimed in claim 1; the regulation and control method comprises the following steps:
step 1: the photovoltaic system (12) starts to work, if the energy storage system (13) is charged, the charging pile (14) starts to work and the load (15) normally works at the moment, when the energy regulation and control system (11) detects that the generating power of the photovoltaic system (12) cannot meet the power required by the normal work of the charging of the energy storage system (13), the charging pile (14) and the load (15), the energy regulation and control system (11) regulates and controls a public power grid (16) to charge the energy storage system (13) and the charging pile (14) and the load (15) to supplement energy for use;
step 2: the photovoltaic system (12) starts to work, if the energy storage system (13) discharges, the charging pile (14) starts to work, and the load (15) works normally, when the energy regulation and control system (11) detects that the sum of the generating power of the photovoltaic system (12) and the discharging power of the energy storage system (13) cannot meet the power required by the normal work of the charging pile (13) and the load (15), the energy regulation and control system (11) regulates and controls a public power grid (16) to supplement energy for use;
and step 3: the photovoltaic system (12) starts to work, if the energy storage system (13) is charged at the moment, the charging pile (14) starts to work, and the load (15) works normally, when the energy regulation and control system (11) detects that the generating power of the photovoltaic system (12) is larger than the power required by the normal work of the energy storage system (13), the charging pile (14) and the load (15), the energy regulation and control system (11) feeds back part of residual electricity, of which the generating power of the photovoltaic system (12) is larger than the sum of the power required by the normal work of the energy storage system (13), the charging pile (14) and the load (15), to the public power grid (16);
and 4, step 4: the photovoltaic system (12) starts to work, if the energy storage system (13) discharges at the moment, the charging pile (14) starts to work, and the load (15) works normally, when the energy regulation and control system (11) detects that the generating power of the photovoltaic system (12) is larger than the power required by the normal work of the charging pile (14) and the load (15), the energy regulation and control system (11) controls the energy storage system (13) to stop discharging, and partial residual electricity of the generating power of the photovoltaic system (12) which is larger than the sum of the power required by the normal work of the charging pile (14) and the load (15) is fed back to the public power grid (16).
4. The method as claimed in claim 3, wherein the step of controlling the smart energy comprehensive control system comprises: further, according to the power consumption demand, the power consumption demand is distributed into primary power consumption, secondary power consumption and tertiary power consumption according to the grade; wherein, the first-level power consumption means that: the electricity demand is important, and the electricity can not be cut off at any time; the secondary power utilization means: the electricity consumption requirement is general, and the electricity can be selectively cut off according to the requirement; the three-level requirements mean: the power consumption is secondary, and the power can be cut off at any time.
5. The method as claimed in claim 4, wherein the intelligent energy comprehensive regulation system comprises:
when the energy regulation and control system (11) detects that the generating capacity of the photovoltaic system (12) is stable, the first maximum capacity value S of the electric load of the park Maximum load Satisfying the following expression (1):
S maximum load ＝S Photovoltaic system -S Energy storage -S Charging pile +S X1 (1)
When the energy regulation and control system (11) detects that the generated energy of the photovoltaic system (12) is reduced, the intelligent energy comprehensive regulation and control system sets S Energy storage 、S Charging pile The required capacity is unchanged; the second maximum capacity value S of the power load of the park at the moment Maximum load 1 Satisfying the following expression (2):
S maximum load 1 ＝S Photovoltaic 1 -S Energy storage -S Charging pile +S X1 (2)
Wherein S is X1 Is a variable voltageActual usable capacity of the device, S Photovoltaic system The power generation capacity is the power generation capacity when the power generation amount of the accessed photovoltaic system (11) is stable; s Energy storage A charging capacity for an accessed energy storage system (12); s Charging pile The capacity of the charging pile; s Photovoltaic 1 The capacity is the power generation capacity when the power generation amount of the photovoltaic system (12) is reduced.
6. The method as claimed in claim 5, wherein the intelligent energy comprehensive regulation system comprises:
the energy regulation and control system (11) regulates and controls electric quantity from a public power grid (16) to compensate the electric quantity S to the micro power grid Power grid compensation (ii) a Satisfying the following expression (3):
S maximum load ＝S Maximum load 1 +S Power grid compensation (3)
7. The method as claimed in claim 6, wherein the step of controlling the smart energy comprehensive control system comprises:
energy regulation and control system (11) regulation and control compensation S Power grid compensation Then, the rated capacity of the main transformer satisfies the following expression (4):
S X2 ＝S X1 +S power grid compensation (4)。
8. The method as claimed in claim 7, wherein the intelligent energy comprehensive regulation system comprises: when the energy regulation and control system (11) monitors S X2 ≥S X1 And the duration is more than or equal to 3S, and the power is sequentially cut off from the sequence of the third-level power utilization and the second-level power utilization according to the level of the power utilization importance degree according to a control instruction issued by the energy regulation and control system (11) until the following expression (5) is met:
S maximum load ＜S X (5)
Wherein S is X Is the rated capacity of the transformer.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116278885A (en) * | 2023-03-09 | 2023-06-23 | 深圳市喜悦智慧数据有限公司 | Grid-connected and off-grid photovoltaic energy storage charging pile system and control method thereof |
| CN117689181A (en) * | 2024-01-31 | 2024-03-12 | 国网辽宁省电力有限公司信息通信分公司 | Micro-grid regulation and control system and method based on intelligent park electricity load |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116278885A (en) * | 2023-03-09 | 2023-06-23 | 深圳市喜悦智慧数据有限公司 | Grid-connected and off-grid photovoltaic energy storage charging pile system and control method thereof |
| CN116278885B (en) * | 2023-03-09 | 2023-11-07 | 深圳市喜悦智慧数据有限公司 | Grid-connected and off-grid photovoltaic energy storage charging pile system and control method thereof |
| CN117689181A (en) * | 2024-01-31 | 2024-03-12 | 国网辽宁省电力有限公司信息通信分公司 | Micro-grid regulation and control system and method based on intelligent park electricity load |
| CN117689181B (en) * | 2024-01-31 | 2024-06-04 | 国网辽宁省电力有限公司信息通信分公司 | Micro-grid regulation and control system and method based on intelligent park electricity load |
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