Methods, devices, electronic equipment and storage media for building electricity supply

Abstract

This invention discloses a method, apparatus, electronic device, and storage medium for supplying electricity to buildings. The method includes: acquiring photovoltaic power generation data and load power consumption data of the building under test; calculating the mismatch coefficient between photovoltaic power generation and load based on the photovoltaic power generation data and the load power consumption data; determining the matching degree calculation information of the building under test based on the photovoltaic power generation data and the load power consumption data, combined with the mismatch coefficient; constructing a building power system corresponding to the matching degree calculation information; and supplying electricity to the building under test based on the corresponding building power system. This method helps to solve the technical problem that existing building power distribution systems do not consider the different matching degrees between photovoltaic resources and loads, ensuring the safe and reliable operation of the power distribution network.

Description

Technical Field

[0001] This invention relates to the technical field of power distribution networks, and more particularly to a method, apparatus, electronic device, and storage medium for supplying electricity to buildings. Background Technology

[0002] Currently, due to the limited renewable energy sources available for buildings, achieving zero-carbon buildings necessitates the zero-carbonization of energy, especially electricity. The full and rational application of building-integrated photovoltaics (BIPV) places new demands on the power distribution system architecture of zero-carbon buildings. To support efficient and low-carbon building operation, there are currently no established solutions for the design process of the power distribution system architecture or the system operation modes during the operational phases.

[0003] Existing solutions for zero-carbon building power distribution system architecture typically only briefly describe the included elements, such as photovoltaics, wind power, energy storage, and loads, without considering how the system architecture design should be adjusted according to different matching degrees of photovoltaic resources and loads in order to achieve the two core objectives of carbon reduction (fully absorbing photovoltaics) and high efficiency (the highest possible source-to-load efficiency).

[0004] Therefore, in order to ensure the safe and reliable operation of the power distribution network and to solve the technical problem that the existing building power distribution system does not take into account the different matching degrees of photovoltaic resources and loads, it is urgent to build a building power supply method. Summary of the Invention

[0005] This invention provides a method, apparatus, electronic device, and storage medium for supplying electricity to buildings, which solves the technical problem that existing building power distribution systems do not take into account the different matching degrees between photovoltaic resources and loads.

[0006] In a first aspect, the present invention provides a method for supplying electricity to a building, comprising:

[0007] Acquire photovoltaic power generation data and load power consumption data of the building under test;

[0008] Based on the photovoltaic power generation data and the load power consumption data, calculate the mismatch coefficient between photovoltaic power generation and load.

[0009] Based on the photovoltaic power generation data and the load power consumption data, and combined with the mismatch coefficient between the photovoltaic and the load, the matching degree calculation information of the building under test is determined;

[0010] Construct the building power system corresponding to the matching degree calculation information;

[0011] Based on the corresponding building power system, power is supplied to the building under test.

[0012] Optionally, the matching degree calculation information includes the matching degree calculation information of photovoltaic and load and the mismatch coefficient calculation information of photovoltaic and load; based on the photovoltaic power generation data and the load power consumption data, combined with the mismatch coefficient of photovoltaic and load, the matching degree calculation information of the building under test is determined, including:

[0013] By comparing the photovoltaic power generation data and the load power consumption data, information on the matching degree between the photovoltaic system and the load of the building under test is obtained.

[0014] Based on the magnitude of the mismatch coefficient between the photovoltaic system and the load, determine the calculation information of the mismatch coefficient between the photovoltaic system and the load of the building under test;

[0015] By summarizing the matching degree calculation information of the photovoltaic and load and the mismatch coefficient calculation information of the photovoltaic and load, the matching degree calculation information of the building under test is obtained.

[0016] Optionally, the photovoltaic and load mismatch coefficient includes the photovoltaic and flexible load mismatch coefficient and the photovoltaic and flexible load plus DC load mismatch coefficient; the photovoltaic and load mismatch coefficient calculation information includes the photovoltaic and flexible load mismatch coefficient calculation information and the photovoltaic and flexible load plus DC load mismatch coefficient calculation information; based on the magnitude of the photovoltaic and load mismatch coefficient, the photovoltaic and load mismatch coefficient calculation information of the building under test is determined, including:

[0017] Based on the magnitude of the mismatch coefficient between the photovoltaic system and the flexible load, determine the calculation information of the mismatch coefficient between the photovoltaic system and the flexible load for the building under test;

[0018] Based on the mismatch coefficient between the photovoltaic system and the flexible load plus DC load, the calculation information of the mismatch coefficient between the photovoltaic system and the flexible load plus DC load of the building under test is determined.

[0019] Optionally, constructing the building electrical system corresponding to the matching degree calculation information includes:

[0020] Generate the building power system architecture information corresponding to the matching degree calculation information;

[0021] Based on the building power system architecture information, a preliminary building power system is constructed;

[0022] Based on the preset building electrical design standards, the preliminary building electrical system is improved to obtain the building electrical system corresponding to the matching degree calculation information.

[0023] Secondly, the present invention provides a power supply device for buildings, comprising:

[0024] The acquisition module is used to acquire photovoltaic power generation data and load power consumption data of the building under test;

[0025] The calculation module is used to calculate the mismatch coefficient between photovoltaic power generation and load based on the photovoltaic power generation data and the load power consumption data;

[0026] The determination module is used to determine the matching degree calculation information of the building under test based on the photovoltaic power generation data and the load power consumption data, combined with the mismatch coefficient between the photovoltaic and the load;

[0027] The construction module is used to construct the building power system corresponding to the matching degree calculation information;

[0028] The supply module is used to supply electricity to the building under test based on the corresponding building power system.

[0029] Optionally, the matching degree calculation information includes the matching degree calculation information between photovoltaic and load and the mismatch coefficient calculation information between photovoltaic and load; the determining module includes:

[0030] The comparison submodule is used to compare the photovoltaic power generation data and the load power consumption data to obtain the matching degree calculation information of the photovoltaic and load of the building under test;

[0031] The determination submodule is used to determine the calculation information of the mismatch coefficient between the photovoltaic and the load of the building under test based on the magnitude of the mismatch coefficient between the photovoltaic and the load.

[0032] The summary submodule is used to summarize the matching degree calculation information of the photovoltaic and the load and the mismatch coefficient calculation information of the photovoltaic and the load, so as to obtain the matching degree calculation information of the building under test.

[0033] Optionally, the mismatch coefficient between photovoltaic and load includes the mismatch coefficient between photovoltaic and flexible load and the mismatch coefficient between photovoltaic and flexible load plus DC load; the calculation information of the mismatch coefficient between photovoltaic and load includes the calculation information of the mismatch coefficient between photovoltaic and flexible load and the calculation information of the mismatch coefficient between photovoltaic and flexible load plus DC load; the determining submodule includes:

[0034] The first determining unit is used to determine the calculation information of the mismatch coefficient between the photovoltaic and flexible load of the building under test based on the magnitude of the mismatch coefficient between the photovoltaic and flexible load.

[0035] The second determining unit is used to determine the calculation information of the mismatch coefficient between the photovoltaic system and the flexible load plus DC load of the building under test based on the mismatch coefficient between the photovoltaic system and the flexible load plus DC load.

[0036] Optionally, the building module includes:

[0037] A generation submodule is used to generate building power system architecture information corresponding to the matching degree calculation information;

[0038] A submodule is constructed to build a preliminary building power system based on the building power system architecture information;

[0039] The improvement submodule is used to improve the preliminary building power system according to the preset building power design standards, and obtain the building power system corresponding to the matching degree calculation information.

[0040] Thirdly, this application provides an electronic device including a processor and a memory, the memory storing computer-readable instructions that, when executed by the processor, perform the steps of the method provided in the first aspect above.

[0041] Fourthly, this application provides a storage medium having a computer program stored thereon, which, when executed by a processor, performs the steps of the method provided in the first aspect above.

[0042] As can be seen from the above technical solutions, the present invention has the following advantages: The present invention provides a method for supplying electricity to buildings. By acquiring photovoltaic power generation data and load power consumption data of the building under test, and calculating the mismatch coefficient between photovoltaic and load based on the photovoltaic power generation data and the load power consumption data, and combining the photovoltaic and load mismatch coefficient, the matching degree calculation information of the building under test is determined, and the building power system corresponding to the matching degree calculation information is constructed. Based on the corresponding building power system, electricity is supplied to the building under test. This method for supplying electricity to buildings solves the technical problem that existing building power distribution systems do not consider the different matching degrees between photovoltaic resources and loads, and ensures the safe and reliable operation of the power distribution network. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a flowchart illustrating the steps of a method for supplying electricity to a building according to the present invention.

[0045] Figure 2 This is a flowchart illustrating the steps of a second embodiment of the method for supplying electricity to a building according to the present invention.

[0046] Figure 3 This is a structural block diagram of a power distribution system architecture according to the present invention;

[0047] Figure 4 This is a structural block diagram of an embodiment of a building power supply device according to the present invention. Detailed Implementation

[0048] This invention provides a method, apparatus, electronic device, and storage medium for supplying electricity to buildings, which addresses the technical problem that existing building power distribution systems do not consider the different matching degrees between photovoltaic resources and loads.

[0049] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0050] Example 1, please refer to Figure 1 , Figure 1 This is a flowchart illustrating the steps of a method for supplying electricity to a building according to a first embodiment of the present invention, including:

[0051] Step S101: Obtain photovoltaic power generation data and load power consumption data of the building under test;

[0052] It should be noted that the photovoltaic power generation data includes building-integrated photovoltaic installation capacity, total power generation, and annual output forecast curve data, while the load power consumption data includes the calculation of the annual total power consumption (including losses) for each load type and the annual load forecast curve data.

[0053] Step S102: Calculate the mismatch coefficient between photovoltaic power generation and load based on the photovoltaic power generation data and the load power consumption data;

[0054] Step S103: Based on the photovoltaic power generation data and the load power consumption data, and combined with the mismatch coefficient between the photovoltaic and the load, determine the matching degree calculation information of the building under test;

[0055] It should be noted that the matching degree calculation information includes the matching degree calculation information of photovoltaic and load and the mismatch coefficient calculation information of photovoltaic and load; the mismatch coefficient of photovoltaic and load includes the mismatch coefficient of photovoltaic and flexible load and the mismatch coefficient of photovoltaic and flexible load plus DC load; the mismatch coefficient calculation information of photovoltaic and load includes the mismatch coefficient calculation information of photovoltaic and flexible load and the mismatch coefficient calculation information of photovoltaic and flexible load plus DC load.

[0056] In this embodiment of the invention, by comparing the photovoltaic power generation data and the load power consumption data, the matching degree calculation information of the photovoltaic and load of the building under test is obtained. Based on the magnitude of the mismatch coefficient of the photovoltaic and load, the mismatch coefficient calculation information of the photovoltaic and load of the building under test is determined. The matching degree calculation information of the photovoltaic and load and the mismatch coefficient calculation information of the photovoltaic and load are summarized to obtain the matching degree calculation information of the building under test.

[0057] Step S104: Construct the building power system corresponding to the matching degree calculation information;

[0058] In this embodiment of the invention, building power system architecture information corresponding to the matching degree calculation information is generated. Based on the building power system architecture information, a preliminary building power system is constructed. According to the preset building power design standards, the preliminary building power system is improved to obtain the building power system corresponding to the matching degree calculation information.

[0059] Step S105: Based on the corresponding building power system, supply power to the building under test;

[0060] The method for supplying electricity to a building provided in this embodiment of the invention involves acquiring photovoltaic power generation data and load power consumption data of the building under test, calculating the mismatch coefficient between photovoltaic and load based on the photovoltaic power generation data and the load power consumption data, determining the matching degree calculation information of the building under test based on the photovoltaic power generation data and the load power consumption data and the mismatch coefficient between photovoltaic and load, constructing the building power system corresponding to the matching degree calculation information, and supplying electricity to the building under test based on the corresponding building power system. This method for supplying electricity to a building solves the technical problem that existing building power distribution systems do not consider the different matching degrees between photovoltaic resources and loads, and ensures the safe and reliable operation of the power distribution network.

[0061] Example 2, please refer to Figure 2 , Figure 2 The flowchart of a method for supplying electricity to a building according to the present invention includes:

[0062] Step S201: Obtain photovoltaic power generation data and load power consumption data of the building under test;

[0063] In this embodiment of the invention, photovoltaic power generation data and load power consumption data of the building under test are obtained. Photovoltaic power generation data refers to the building's photovoltaic installation capacity, total power generation and annual output forecast curve data. Load power consumption data refers to the calculation of the annual total power consumption (including losses) of each load type and the annual load forecast curve data.

[0064] For a detailed implementation, please refer to Figure 3 , Figure 3 This is a structural block diagram of a power distribution system architecture according to the present invention. 301 represents the power grid section, 301 represents the reserved AC power supply section, 301 represents the basic architecture of the "source-storage-DC-flexible-charging" system, and 301 represents the extended architecture of the "source-storage-DC-flexible-charging" system. The zero-carbon building "source-storage-DC-flexible-charging" power distribution system architecture can be mainly divided into four parts: the grid connection section 301, the reserved AC power supply section 302, the basic architecture of the "source-storage-DC-flexible-charging" system 303, and the extended architecture of the "source-storage-DC-flexible-charging" system 304. The first two parts are the same as the traditional building AC power distribution system structure; in actual engineering, only the substation and wiring need to be arranged reasonably. The basic architecture and the extended architecture utilize a low-voltage DC system structure, which is conducive to fully leveraging the efficiency advantages of DC access for photovoltaic energy storage and direct connection of DC loads. The DC system, through DC voltage regulation and coordination with DC equipment, jointly achieves the efficient application and consumption of photovoltaic and other zero-carbon energy sources. The significance of the three power supply circuits will be explained below.

[0065] (1) Retain a portion of AC power supply:

[0066] 1) The fire protection load in the building should be a self-contained power distribution system, and non-daily electricity use should not have an impact on carbon reduction. Considering fire safety, the original mature and standard AC power supply line should be maintained.

[0067] 2) The proportion of elevator load cannot be ignored, but because it involves personal safety, the reliability requirements are higher. Also, because it has certain impact characteristics, if it is not powered independently, it will affect other loads connected in parallel. Therefore, elevator load is more suitable to form its own power distribution system and adopt a mature AC connection scheme.

[0068] 3) When the total amount of renewable energy generation on the building site is much less than the total load power consumption, the traditional AC power distribution scheme should be retained for some AC loads.

[0069] (2) Infrastructure of Zero-Carbon Building "Source Storage Direct Flexible Charging" System:

[0070] 1) The priority for buildings to absorb renewable energy should be: flexible loads > charging piles > energy storage systems.

[0071] 2) Since air conditioning load is a commonly used flexible load, it has the three characteristics of a flexible load and usually accounts for a high proportion of building electricity consumption. Due to the thermal insulation characteristics of the building envelope, its adjustment range is wide, so it is used as a representative of flexible load.

[0072] 3) The smallest unit structure that leverages the advantages of DC power enables efficient utilization and full absorption of photovoltaic power, using a single voltage level.

[0073] (3) Extended architecture of zero-carbon building “source storage direct flexible charging” system:

[0074] 1) When photovoltaic power generation can cover more load electricity consumption, the amount of DC load connected should be increased to improve the photovoltaic absorption rate. When flexible loads cannot fully match photovoltaic output, energy storage should be appropriately configured.

[0075] 2) If the conditions in 1) are met, and the DC voltage levels of the load equipment are aggregated at two levels, two DC buses of different voltage levels should be set up and led out through different AC-DC converters to reduce the cost of load equipment modification and improve efficiency.

[0076] 3) For DC load selection, priority should be given to loads that match the photovoltaic output to balance efficiency and absorption. For loads that do not match, priority should be given to loads with high DC power supply efficiency.

[0077] Step S202: Based on the photovoltaic power generation data and the load power consumption data, calculate the mismatch coefficient between photovoltaic power generation and load.

[0078] In this embodiment of the invention, the mismatch coefficient between photovoltaic power generation and load power consumption can be calculated from the photovoltaic power generation data and the load power consumption data.

[0079] In practical implementation, let the curve of actual building electricity consumption be E(τ), and the curve of photovoltaic (which may include other renewable energy sources, but is mainly photovoltaic) supply be S(τ). Then the mismatch coefficient between photovoltaic and load is as follows:

[0080] ;

[0081] Where T is the time period under consideration, and α unb It is the mismatch coefficient, which represents the percentage of the cumulative building load shortfall relative to the total building load electricity consumption.

[0082] Step S203: Compare the photovoltaic power generation data and the load power consumption data to obtain the matching degree calculation information of the photovoltaic and load of the building under test;

[0083] It should be noted that the matching degree calculation information includes the matching degree calculation information of photovoltaic and load and the mismatch coefficient calculation information of photovoltaic and load.

[0084] The mismatch coefficient between photovoltaics and loads includes the mismatch coefficient between photovoltaics and flexible loads, as well as the mismatch coefficient between photovoltaics and flexible loads plus DC loads.

[0085] The information on the mismatch coefficient calculation between photovoltaics and loads includes the information on the mismatch coefficient calculation between photovoltaics and flexible loads, as well as the information on the mismatch coefficient calculation between photovoltaics and flexible loads plus DC loads.

[0086] In this embodiment of the invention, by comparing the photovoltaic power generation data and the load power consumption data, when the photovoltaic power generation data and the load power consumption data meet the following two conditions, the corresponding photovoltaic and load matching degree calculation information is obtained. The two conditions include: 1) the total photovoltaic power generation is less than or equal to the total power of high-power flexible loads; 2) the total photovoltaic power generation is greater than the total power of all loads.

[0087] Step S204: Determine the calculation information of the mismatch coefficient between photovoltaic and load of the building under test based on the value of the mismatch coefficient between photovoltaic and load.

[0088] In an optional embodiment, the mismatch coefficient calculation information of the photovoltaic and load of the building under test is determined based on the magnitude of the mismatch coefficient between the photovoltaic and the load, including:

[0089] Based on the magnitude of the mismatch coefficient between the photovoltaic system and the flexible load, determine the calculation information of the mismatch coefficient between the photovoltaic system and the flexible load for the building under test;

[0090] Based on the mismatch coefficient between the photovoltaic system and the flexible load plus DC load, the calculation information of the mismatch coefficient between the photovoltaic system and the flexible load plus DC load of the building under test is determined.

[0091] In this embodiment of the invention, the mismatch coefficient calculation information of the photovoltaic and flexible load of the building under test is determined based on the magnitude of the mismatch coefficient between the photovoltaic and flexible loads. The mismatch coefficient of the photovoltaic and flexible loads plus the DC load of the building under test is also determined based on the mismatch coefficient of the photovoltaic and flexible loads plus the DC load.

[0092] In specific implementation, the corresponding mismatch coefficient calculation information is determined when the mismatch coefficient between the photovoltaic and the load of the building under test meets the following conditions: 1) The mismatch coefficient between the photovoltaic and the flexible load is greater than 50%; 2) The mismatch coefficient between the photovoltaic and the flexible load plus the DC load is greater than 50%.

[0093] Step S205: Summarize the matching degree calculation information of the photovoltaic and the load and the mismatch coefficient calculation information of the photovoltaic and the load to obtain the matching degree calculation information of the building under test;

[0094] In this embodiment of the invention, the matching degree calculation information of the photovoltaic and the load and the mismatch coefficient calculation information of the photovoltaic and the load are combined to obtain the matching degree calculation information of the building under test.

[0095] In practical implementation, the matching degree between photovoltaic capacity and load is calculated. The matching degree calculation information is determined when the total photovoltaic power generation of the building under test and the mismatch coefficient between photovoltaic and load meet the following conditions: ① The total photovoltaic power generation is less than or equal to the total power of high-power flexible load; ② The mismatch coefficient between photovoltaic and flexible load is greater than 50%; ③ The mismatch coefficient between photovoltaic and flexible load plus DC load is greater than 50%; ④ The total photovoltaic power generation is greater than the total amount of all loads.

[0096] Step S206: Generate building power system architecture information corresponding to the matching degree calculation information;

[0097] In this embodiment of the invention, the corresponding building power system architecture information is generated from the matching degree calculation information.

[0098] In specific implementation, the matching degree calculation information includes: ① the total photovoltaic power generation is less than or equal to the total power generation of high-power flexible loads; ② the mismatch coefficient between photovoltaics and flexible loads is greater than 50%; ③ the mismatch coefficient between photovoltaics and flexible loads plus DC loads is greater than 50%; ④ the total photovoltaic power generation is greater than the total power of all loads.

[0099] The corresponding building power system architecture information includes the basic architecture information of the building power distribution system, the extended architecture information of the building power distribution system, and the AC architecture information of the building power distribution system. When the matching degree calculation information meets the above conditions, the corresponding building power system architecture information is generated.

[0100] (1) Building power distribution system basic architecture information design: 1) When ① is met, photovoltaic and high-power flexible loads (such as air conditioners) are matched, and DC charging piles and energy storage are reasonably configured to form a 750V unipolar DC system architecture; 2) When ② is met, the mismatch coefficient is less than 5% within the energy storage configured in this architecture, and surplus photovoltaics are not connected to this architecture; 3) When ③ is met, some high-power loads are converted into DC loads and incorporated into this architecture, and energy storage is configured to make the mismatch coefficient less than 5%, and surplus photovoltaics are not connected to this architecture; 4) When ④ is met, all loads suitable for the voltage level of this architecture are DC converted and connected.

[0101] (2) Building power distribution system expansion architecture design: 1) If ① is satisfied, no expansion architecture is required; 2) If ② is satisfied, surplus photovoltaic power, low-power flexible loads, DC loads, and energy storage are separately constructed as a single-pole DC system at a suitable voltage level; 3) If ③ is satisfied, all loads with both AC and DC options are selected as DC, and sufficient energy storage is configured to ensure that the photovoltaic power supply rate of the loads within this architecture reaches more than 90%; 4) If ④ is satisfied, all loads except fire protection, safety, and elevator loads are converted to DC and connected to this architecture. Once the safety technology for connecting the DC power distribution system to elevator loads is sufficiently mature, the addition of elevator loads to this architecture will be considered.

[0102] (3) AC architecture design of building power distribution system: 1) When ① is met, except for high-power flexible loads, other loads are powered by traditional 380V AC power supply system; 2) When ② is met, loads with higher AC power supply efficiency from the grid side than DC power supply, as well as fire protection, safety, and elevator loads are powered by traditional 380V AC power supply; 3) When ③ is met, fire protection, safety, elevator loads, and loads for which DC transformation is not mature are powered by traditional 380V AC power supply; 4) When ④ is met, only fire protection, safety, and elevator loads are powered by traditional 380V AC power supply.

[0103] Step S207: Based on the building power system architecture information, construct a preliminary building power system;

[0104] Step S208: Based on the preset building power design standards, improve the preliminary building power system to obtain the building power system corresponding to the matching degree calculation information;

[0105] In this embodiment of the invention, the preliminary building power system is improved by combining the preset building power design standards to obtain the building power system corresponding to the matching degree calculation information.

[0106] In practical implementation, the architectural design not covered in the above steps will be improved based on existing building electrical design and DC power distribution design standards, including backup power supply, redundancy of transformers and converters, busbar segmentation, grounding system, and switching devices.

[0107] Step S209: Based on the corresponding building power system, supply power to the building under test;

[0108] In this embodiment of the invention, power is supplied to the building under test based on the corresponding building power system.

[0109] In practical implementation, the operation methods of the "source-storage-direct-charge flexible-charging" power distribution system for zero-carbon buildings under different photovoltaic resources are as follows:

[0110] (1) When the building under test meets condition ① (the total photovoltaic power generation is less than or equal to the total power of the high-power flexible load), the power distribution system operation method is as follows: 1) Basic structure: Combine the day-ahead photovoltaic load forecast, match the photovoltaic output curve through flexible load adjustment, and use energy storage to compensate for the part that cannot be fully matched; 2) AC part: maintain the traditional AC operation mode.

[0111] (2) When the building under test meets condition ② (the mismatch coefficient between photovoltaic and flexible load is greater than 50%), the power distribution system operation method is as follows: 1) Basic structure: In conjunction with the day-ahead photovoltaic load forecast, the mismatch coefficient is reduced to 5% through the joint adjustment of flexible load and energy storage system, and excess photovoltaic power is fed back to the AC part through AC-DC converter; 2) AC part: Maintain the traditional AC operation mode; 3) Extended structure: In conjunction with the day-ahead photovoltaic load forecast, the photovoltaic output curve is matched through flexible load, and the part that cannot be fully matched is compensated by energy storage.

[0112] (3) When the building under test meets condition ③ (the mismatch coefficient between photovoltaic and flexible load plus DC load is greater than 50%), the power distribution system operation method is as follows: 1) Basic structure: Based on the day-ahead photovoltaic load forecast, the mismatch coefficient is reduced to 5% through the joint adjustment of flexible load and energy storage system, and excess photovoltaic power is fed back to the AC part through AC-DC converter; 2) AC part: Maintain the traditional AC operation mode; 3) Extended structure: Based on the day-ahead photovoltaic load forecast, the photovoltaic output curve is matched through the adjustment of flexible load, and the energy storage charging and discharging is used to meet more than 90% of the load power supply, and the remaining load is supplied by the grid through AC-DC converter.

[0113] (4) When the building under test meets condition ④ (the total photovoltaic power generation is greater than the total load), the power distribution system operation method is as follows: 1) Basic architecture & extended architecture: Combined with the day-ahead photovoltaic load forecast, the mismatch coefficient is reduced to 0 through the joint adjustment of flexible load and energy storage system, and the excess photovoltaic power is fed back to the AC part or fed back to the grid through AC-DC converter; 2) AC part: Maintain the traditional AC operation mode.

[0114] The method for supplying electricity to a building provided in this embodiment of the invention involves acquiring photovoltaic power generation data and load power consumption data of the building under test, calculating the mismatch coefficient between photovoltaic and load based on the photovoltaic power generation data and the load power consumption data, determining the matching degree calculation information of the building under test based on the photovoltaic power generation data and the load power consumption data and the mismatch coefficient between photovoltaic and load, constructing the building power system corresponding to the matching degree calculation information, and supplying electricity to the building under test based on the corresponding building power system. This method for supplying electricity to a building solves the technical problem that existing building power distribution systems do not consider the different matching degrees between photovoltaic resources and loads, and ensures the safe and reliable operation of the power distribution network.

[0115] Please see Figure 4 , Figure 4 A structural block diagram of an embodiment of a building power supply device according to the present invention includes:

[0116] The acquisition module 401 is used to acquire photovoltaic power generation data and load power consumption data of the building under test;

[0117] The calculation module 402 is used to calculate the mismatch coefficient between photovoltaic power generation and load based on the photovoltaic power generation data and the load power consumption data;

[0118] The determination module 403 is used to determine the matching degree calculation information of the building under test based on the photovoltaic power generation data and the load power consumption data;

[0119] Module 404 is used to construct the building power system corresponding to the matching degree calculation information;

[0120] The supply module 405 is used to supply electricity to the building under test based on the corresponding building power system.

[0121] In an optional embodiment, the determining module 402 includes:

[0122] The calculation submodule is used to calculate the mismatch coefficient between photovoltaic power generation and load based on the photovoltaic power generation data and the load power consumption data;

[0123] The determination submodule is used to determine the matching degree calculation information of the building under test based on the photovoltaic power generation data and the load power consumption data, combined with the mismatch coefficient between the photovoltaic and the load.

[0124] In an optional embodiment, the matching degree calculation information includes matching degree calculation information between photovoltaic and load and mismatch coefficient calculation information between photovoltaic and load; the determining submodule includes:

[0125] The comparison unit is used to compare the photovoltaic power generation data and the load power consumption data to obtain the matching degree calculation information of the photovoltaic and load of the building under test;

[0126] The determining unit is used to determine the calculation information of the mismatch coefficient between the photovoltaic and the load of the building under test based on the magnitude of the mismatch coefficient between the photovoltaic and the load.

[0127] The summarization unit is used to summarize the matching degree calculation information of the photovoltaic and the load and the mismatch coefficient calculation information of the photovoltaic and the load, so as to obtain the matching degree calculation information of the building under test.

[0128] In an optional embodiment, the mismatch coefficient between the photovoltaic system and the load includes the mismatch coefficient between the photovoltaic system and the flexible load, and the mismatch coefficient between the photovoltaic system and the flexible load plus the DC load; the calculation information of the mismatch coefficient between the photovoltaic system and the load includes the calculation information of the mismatch coefficient between the photovoltaic system and the flexible load, and the calculation information of the mismatch coefficient between the photovoltaic system and the flexible load plus the DC load; the determining unit includes:

[0129] The first determining subunit is used to determine the calculation information of the mismatch coefficient between the photovoltaic and flexible load of the building under test based on the magnitude of the mismatch coefficient between the photovoltaic and flexible load.

[0130] The second determining subunit is used to determine the calculation information of the mismatch coefficient between the photovoltaic and flexible load plus DC load of the building under test based on the mismatch coefficient between the photovoltaic and flexible load plus DC load.

[0131] In an optional embodiment, the building module 403 includes:

[0132] A generation submodule is used to generate building power system architecture information corresponding to the matching degree calculation information;

[0133] A submodule is constructed to build a preliminary building power system based on the building power system architecture information;

[0134] The improvement submodule is used to improve the preliminary building power system according to the preset building power design standards, and obtain the building power system corresponding to the matching degree calculation information.

[0135] This invention also provides an electronic device, including a memory and a processor. The memory stores a computer program, which, when executed by the processor, causes the processor to perform the steps of the building power supply method as described in any of the above embodiments.

[0136] This invention also provides a computer storage medium storing a computer program thereon, which, when executed by the processor, implements the steps of the building power supply method as described in any of the above embodiments.

[0137] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0138] In the several embodiments provided in this application, it should be understood that the methods, apparatuses, electronic devices, and storage media disclosed in this invention can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0139] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0140] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0141] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned readable storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0142] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for supplying electricity to a building, characterized in that, include: Acquire photovoltaic power generation data and load power consumption data of the building under test; the photovoltaic power generation data includes the building's photovoltaic installation capacity, total power generation and annual output forecast curve data, and the load power consumption data includes the annual total power consumption calculation and annual load forecast curve data for each load type; Based on the photovoltaic power generation data and the load power consumption data, the mismatch coefficient between photovoltaic and load is calculated; the mismatch coefficient represents the percentage of the cumulative building load shortfall to the total building load power consumption. Based on the photovoltaic power generation data and the load power consumption data, and combined with the mismatch coefficient between the photovoltaic and the load, the matching degree calculation information of the building under test is determined; The matching degree calculation information includes: the total photovoltaic power generation is less than or equal to the total power generation of high-power flexible loads, the mismatch coefficient between photovoltaics and flexible loads is greater than 50%, the mismatch coefficient between photovoltaics and flexible loads plus DC loads is greater than 50%, and the total photovoltaic power generation is greater than the total power of all loads. Construct the building power system corresponding to the matching degree calculation information; Based on the corresponding building power system, power is supplied to the building under test. The matching degree calculation information consists of the matching degree calculation information of photovoltaic and load and the mismatch coefficient calculation information of photovoltaic and load; based on the photovoltaic power generation data and the load power consumption data, combined with the mismatch coefficient of photovoltaic and load, the matching degree calculation information of the building under test is determined, including: By comparing the photovoltaic power generation data and the load power consumption data, information on the matching degree between the photovoltaic system and the load of the building under test is obtained. Based on the magnitude of the mismatch coefficient between the photovoltaic system and the load, determine the calculation information of the mismatch coefficient between the photovoltaic system and the load of the building under test; The matching degree calculation information of the photovoltaic and load is summarized with the mismatch coefficient calculation information of the photovoltaic and load to obtain the matching degree calculation information of the building under test. The photovoltaic and load mismatch coefficient includes the mismatch coefficient between photovoltaic and flexible load, and the mismatch coefficient between photovoltaic and flexible load plus DC load; the calculation information of the photovoltaic and load mismatch coefficient includes the calculation information of the mismatch coefficient between photovoltaic and flexible load, and the calculation information of the mismatch coefficient between photovoltaic and flexible load plus DC load; based on the magnitude of the photovoltaic and load mismatch coefficient, the calculation information of the photovoltaic and load mismatch coefficient of the building under test is determined, including: Based on the magnitude of the mismatch coefficient between the photovoltaic system and the flexible load, determine the calculation information of the mismatch coefficient between the photovoltaic system and the flexible load for the building under test; Based on the mismatch coefficient between the photovoltaic system and the flexible load plus DC load, determine the calculation information of the mismatch coefficient between the photovoltaic system and the flexible load plus DC load of the building under test; Constructing the building electrical system corresponding to the matching degree calculation information includes: Generate the building power system architecture information corresponding to the matching degree calculation information; Based on the building power system architecture information, a preliminary building power system is constructed; Based on the preset building electrical design standards, the preliminary building electrical system is improved to obtain the building electrical system corresponding to the matching degree calculation information; The building power system architecture information includes the basic architecture information of the building power distribution system, the extended architecture information of the building power distribution system, and the AC architecture information of the building power distribution system; The design of the building's power distribution system infrastructure information specifically includes: When the total photovoltaic power generation is less than or equal to the total power of the high-power flexible load, the photovoltaic and high-power flexible loads are matched, and DC charging piles and energy storage are reasonably configured to form a 750V unipolar DC system architecture. When the mismatch coefficient between photovoltaic and flexible load is greater than 50%, the mismatch coefficient is made less than 5% within the energy storage configured in the building power distribution system infrastructure, and surplus photovoltaic power is not connected to the building power distribution system infrastructure. When the mismatch coefficient between photovoltaic and flexible load plus DC load is greater than 50%, some high-power loads will be converted into DC loads and incorporated into the building power distribution system infrastructure, and energy storage will be configured to make the mismatch coefficient less than 5%. Excess photovoltaic power will not be connected to the building power distribution system infrastructure. When the total photovoltaic power generation exceeds the total load, all loads that are suitable for the voltage level of the building's power distribution system infrastructure will be DC-connected and connected.

2. A power supply device for buildings, characterized in that, include: The acquisition module is used to acquire photovoltaic power generation data and load power consumption data of the building under test; the photovoltaic power generation data includes the building's photovoltaic installation capacity, total power generation and annual output forecast curve data, and the load power consumption data includes the annual total power consumption calculation and annual load forecast curve data for each load type. The calculation module is used to calculate the mismatch coefficient between photovoltaic power generation and load based on the photovoltaic power generation data and the load power consumption data; the mismatch coefficient represents the percentage of the cumulative building load shortfall to the total building load power consumption; The determination module is used to determine the matching degree calculation information of the building under test based on the photovoltaic power generation data and the load power consumption data, combined with the mismatch coefficient between the photovoltaic and the load; The matching degree calculation information includes: the total photovoltaic power generation is less than or equal to the total power generation of high-power flexible loads, the mismatch coefficient between photovoltaics and flexible loads is greater than 50%, the mismatch coefficient between photovoltaics and flexible loads plus DC loads is greater than 50%, and the total photovoltaic power generation is greater than the total power of all loads. The construction module is used to construct the building power system corresponding to the matching degree calculation information; The supply module is used to supply electricity to the building under test based on the corresponding building power system. The matching degree calculation information consists of the matching degree calculation information of photovoltaic and load and the mismatch coefficient calculation information of photovoltaic and load; the determining module includes: The comparison submodule is used to compare the photovoltaic power generation data and the load power consumption data to obtain the matching degree calculation information of the photovoltaic and load of the building under test; The determination submodule is used to determine the calculation information of the mismatch coefficient between the photovoltaic and the load of the building under test based on the magnitude of the mismatch coefficient between the photovoltaic and the load. The summarization submodule is used to summarize the obtained photovoltaic and load matching degree calculation information and the photovoltaic and load mismatch coefficient calculation information to obtain the matching degree calculation information of the building under test. The mismatch coefficient between photovoltaic (PV) and load includes the mismatch coefficient between PV and flexible load, and the mismatch coefficient between PV and flexible load plus DC load; the calculation information of the mismatch coefficient between PV and load includes the calculation information of the mismatch coefficient between PV and flexible load, and the calculation information of the mismatch coefficient between PV and flexible load plus DC load; the determining submodule includes: The first determining unit is used to determine the calculation information of the mismatch coefficient between the photovoltaic and flexible load of the building under test based on the magnitude of the mismatch coefficient between the photovoltaic and flexible load. The second determining unit is used to determine the calculation information of the mismatch coefficient between the photovoltaic and flexible load plus DC load of the building under test based on the mismatch coefficient between the photovoltaic and flexible load plus DC load. The building module includes: A generation submodule is used to generate building power system architecture information corresponding to the matching degree calculation information; A submodule is constructed to build a preliminary building power system based on the building power system architecture information; The improvement submodule is used to improve the preliminary building power system according to the preset building power design standards, and obtain the building power system corresponding to the matching degree calculation information; The building power system architecture information includes the basic architecture information of the building power distribution system, the extended architecture information of the building power distribution system, and the AC architecture information of the building power distribution system; The design of the building's power distribution system infrastructure information specifically includes: When the total photovoltaic power generation is less than or equal to the total power of the high-power flexible load, the photovoltaic and high-power flexible loads are matched, and DC charging piles and energy storage are reasonably configured to form a 750V unipolar DC system architecture. When the mismatch coefficient between photovoltaic and flexible load is greater than 50%, the mismatch coefficient is made less than 5% within the energy storage configured in the building power distribution system infrastructure, and surplus photovoltaic power is not connected to the building power distribution system infrastructure. When the mismatch coefficient between photovoltaic and flexible load plus DC load is greater than 50%, some high-power loads will be converted into DC loads and incorporated into the building power distribution system infrastructure, and energy storage will be configured to make the mismatch coefficient less than 5%. Excess photovoltaic power will not be connected to the building power distribution system infrastructure. When the total photovoltaic power generation exceeds the total load, all loads that are suitable for the voltage level of the building's power distribution system infrastructure will be DC-connected and connected.

3. An electronic device, characterized in that, It includes a processor and a memory, the memory storing computer-readable instructions that, when executed by the processor, perform the method as described in claim 1.

4. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it performs the method as described in claim 1.

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