Building electrical system energy efficiency evaluation method and device

Abstract

The invention discloses a building electrical energy efficiency evaluation method and device. The method comprises the steps that 1, building types are classified; 2, first-level evaluation indexes and first-level evaluation index scores are determined, wherein the first-level evaluation indexes comprise a first-level design energy efficiency evaluation index, a first-level operation and maintenance energy efficiency evaluation index and a first-level innovation energy efficiency evaluation index; 3, on the basis of the first-level evaluation indexes, second-level evaluation indexes and second-level evaluation index scores are determined, and the second-level evaluation indexes comprise second-level design energy efficiency evaluation indexes and second-level operation and maintenance energy efficiency evaluation indexes; 4, on the basis of the second-level evaluation indexes, third-level evaluation indexes and third-level evaluation index scores are determined, and the third-level evaluation indexes comprise a third-level design energy efficiency evaluation index, a third-level operation and maintenance energy efficiency evaluation index and a third-level innovation energy efficiency evaluation index; and step 5, determining the score of the to-be-evaluated building electrical system according to the indexes of all levels and the score, thereby dividing the energy efficiency level of the building electrical system.

Description

Technical Field

[0001] The present invention relates to the field of building electrical systems, and in particular to a method and device for evaluating energy efficiency of building electrical systems. Background Art

[0002] The construction industry is a major carbon emitter in my country. The three characteristics of my country's construction industry are: large-scale construction, large-scale consumption, and large-scale emissions. At present, the proportion of energy-saving buildings in urban buildings in my country is about 30%, and less than 4% of existing buildings in the country have adopted energy efficiency improvement measures. Therefore, it is urgent to improve the energy efficiency level of buildings.

[0003] The energy efficiency of the electrical system is an indicator that reflects the efficiency of electric energy utilization in the design of the building electrical system, the energy efficiency of electrical equipment, and the operation and maintenance management of the electrical system. The energy efficiency of the building electrical system is assessed, and the energy efficiency level of the electrical system can be determined based on the total evaluation score. Electricity consumption accounts for a large proportion of building energy consumption, exceeding 55%, but the construction industry currently lacks an energy efficiency evaluation method for building electrical systems. In the past, whether the building electrical system is energy-saving was mostly a qualitative evaluation, without quantitative standards, and it was impossible to achieve hierarchical management of the energy efficiency level of the building electrical system.

[0004] Therefore, it is expected to develop new technical methods that can at least partially overcome the deficiencies in the prior art. Summary of the invention

[0005] The purpose of this invention is to propose the first quantitative energy efficiency evaluation method for electrical systems based on the characteristics of engineering project design and operation in my country. The application of this method can realize the hierarchical management of the energy efficiency level of building electrical systems, guide the relevant parties in the building electrical industry to work together to improve the energy efficiency of the system, and achieve high efficiency and energy saving in the entire life cycle of building electrical systems from design to operation and maintenance.

[0006] More specifically, the present invention proposes a method for evaluating the energy efficiency of a building electrical system, comprising the following steps:

[0007] Step 1, classify the building types, including public buildings and industrial buildings;

[0008] Step 2, determining the first-level evaluation indicators and the first-level evaluation indicator scores, wherein the first-level evaluation indicators include the first-level design energy efficiency evaluation indicators, the first-level operation and maintenance energy efficiency evaluation indicators, and the first-level innovation energy efficiency evaluation indicators;

[0009] Step 3: Based on the first-level evaluation indicators, determine the second-level evaluation indicators and the scores of the second-level evaluation indicators. The second-level evaluation indicators include the second-level design energy efficiency evaluation indicators and the second-level operation and maintenance energy efficiency evaluation indicators.

[0010] Step 4: Based on the secondary evaluation indicators, determine the tertiary evaluation indicators and their scores. The tertiary evaluation indicators include the tertiary design energy efficiency evaluation indicators, the tertiary operation and maintenance energy efficiency evaluation indicators, and the tertiary innovation energy efficiency evaluation indicators; and

[0011] Step 5: Determine the score of the building electrical system to be evaluated based on the above indicators and scores at each level, and then classify the energy efficiency level of the building electrical system.

[0012] According to the implementation scheme of the present invention, in step 2, the score of each first-level evaluation index is: 50 points for the first-level design energy efficiency evaluation index, 40 points for the first-level operation and maintenance energy efficiency evaluation index, and 10 points for the first-level innovation energy efficiency evaluation index.

[0013] According to the implementation plan of the present invention, in step 3, the secondary design energy efficiency evaluation indicators include: secondary evaluation indicators for designing energy efficiency substations, secondary evaluation indicators for designing energy efficiency distribution systems, secondary evaluation indicators for designing energy efficiency lighting systems, and secondary evaluation indicators for designing energy efficiency building electrical energy efficiency management systems; for industrial buildings, the scores are 12 points, 15 points, 8 points, and 15 points respectively; for public buildings, the scores are 10 points, 15 points, 10 points, and 15 points respectively; the total score is 50 points.

[0014] According to the implementation plan of the present invention, in step 3, the secondary operation and maintenance energy efficiency evaluation indicators include: operation and maintenance energy efficiency distribution system secondary evaluation indicators, operation and maintenance energy efficiency lighting system secondary evaluation indicators, operation and maintenance energy efficiency building electrical energy efficiency management system secondary evaluation indicators, operation and maintenance energy efficiency full life cycle operation and maintenance secondary evaluation indicators; for industrial buildings, the scores are: 12 points, 6 points, 16 points, and 6 points respectively; for public buildings, the scores are 10 points, 7 points, 17 points, and 6 points respectively; the total score is 40 points.

[0015] According to the implementation scheme of the present invention, the three-level design energy efficiency evaluation indicators include: three-level evaluation indicators for designing energy-efficient substations, three-level evaluation indicators for designing energy-efficient distribution systems, three-level evaluation indicators for designing energy-efficient lighting systems, and three-level evaluation indicators for designing energy-efficient building electrical energy efficiency management systems.

[0016] According to the implementation scheme of the present invention, the three-level operation and maintenance energy efficiency evaluation indicators include: three-level evaluation indicators of operation and maintenance energy efficiency distribution system, three-level evaluation indicators of operation and maintenance energy efficiency lighting system, three-level evaluation indicators of operation and maintenance energy efficiency building electrical management system and three-level evaluation indicators of operation and maintenance energy efficiency full life cycle operation and maintenance.

[0017] According to the implementation plan of the present invention, the three-level innovative energy efficiency evaluation indicators include: renewable energy power generation rate, electric energy storage system, DC distribution system, and building electricity flexibility, with scores of 4 points, 3 points, 1 point, and 2 points respectively; a total of 10 points.

[0018] According to the implementation scheme of the present invention, the three-level evaluation indexes for designing energy-efficient substations include: building electrical system energy distance, substation location, distribution transformer energy efficiency, and power supply voltage level. For industrial buildings, the scores are 3 points, 5 points, 3 points, and 1 point, respectively, for a total of 12 points; for public buildings, the scores are 3 points, 3 points, 3 points, and 1 point, respectively, for a total of 10 points;

[0019] The three-level evaluation indicators for designing energy-efficient power distribution systems include: electrical grid division, electrical grid coverage, electrical system load shedding coverage, load shedding duration, electrical equipment energy efficiency, reactive power compensation, and harmonic control measures, with scores of 2 points, 4 points, 2 points, 1 point, 4 points, 1 point, and 1 point, for a total of 15 points.

[0020] The three-level evaluation indicators for designing energy-efficient lighting systems include: lighting product energy efficiency, lighting power density, lighting automatic control measures, and lighting automatic control coverage; for industrial buildings, the scores are 3 points, 2 points, 1 point, and 2 points, totaling 8 points; for public buildings, the scores are 3 points, 3 points, 2 points, and 2 points, totaling 10 points;

[0021] The three-level evaluation indicators for designing energy-efficient building electrical energy efficiency management systems include: energy consumption sub-item metering, zone metering, building electrical energy efficiency management system, measurement / detection equipment settings, metering equipment accuracy, personnel detection measures, ventilation and air-conditioning water supply and drainage equipment control; the scores are 2 points, 2 points, 2 points, 3 points, 2 points, 1 point and 3 points respectively, totaling 15 points.

[0022] According to the implementation scheme of the present invention, the three-level evaluation indicators of the operation and maintenance energy efficiency distribution system include: transformer operation energy efficiency, motor equipment energy efficiency level, power factor, harmonic distortion rate, electrical system average voltage drop, PCC negative sequence voltage imbalance. For industrial buildings, the scores are 3 points, 2 points, 1 point, 4 points, 1 point, and 1 point, respectively, with a total of 12 points; for public buildings, the scores are 2 points, 1 point, 1 point, 4 points, 1 point, and 1 point, respectively, with a total of 10 points;

[0023] The three-level evaluation indicators of the operation and maintenance energy efficiency lighting system include: lighting equipment, lighting control, illumination and lighting power density. For industrial buildings, the scores are 2 points, 2 points, and 2 points respectively, with a total of 6 points; for public buildings, the scores are 2 points, 2 points, and 3 points respectively, with a total of 7 points;

[0024] The three-level evaluation indicators of the operation and maintenance energy-efficient building electrical management system include the coverage of sub-item metering, the coverage of zoned energy consumption metering, the coverage of the electrical energy consumption management system, the building occupancy detection system, and the control precision of the air-conditioning power system. For industrial buildings, the scores are 4 points, 4 points, 4 points, 1 point, and 3 points, respectively, for a total of 16 points; for public buildings, the scores are 5 points, 4 points, 4 points, 1 point, and 3 points, respectively, for a total of 17 points; and

[0025] The three-level evaluation indicators for operation and maintenance energy efficiency throughout the life cycle include energy consumption audit analysis, energy efficiency measures, replacement of inefficient equipment, operation and maintenance procedures and management, and visual operation and maintenance platform, with scores of 1 point, 1 point, 1 point, 2 points, and 1 point respectively, totaling 6 points.

[0026] According to the implementation scheme of the present invention, the energy efficiency level of the building electrical system is divided into level one, level two and level three according to the total score and the following standards: if the total evaluation score is 60≤Pts<70, the electrical system energy efficiency level is level one; if the total evaluation score is 70≤Pts<85, the electrical system energy efficiency level is level two; if the total evaluation score is 85≤Pts<100, the electrical system energy efficiency level is level three.

[0027] The present invention also provides a building electrical system energy efficiency evaluation device, which is characterized by comprising:

[0028] Building type classification module, used to classify building types, including public buildings and industrial buildings;

[0029] A first-level evaluation index module, used to determine first-level evaluation indicators and first-level evaluation index scores, wherein the first-level evaluation indicators include first-level design energy efficiency evaluation indicators, first-level operation and maintenance energy efficiency evaluation indicators, and first-level innovation energy efficiency evaluation indicators;

[0030] A secondary evaluation index module is used to determine secondary evaluation indicators and secondary evaluation index scores based on the primary evaluation indicators, wherein the secondary evaluation indicators include secondary design energy efficiency evaluation indicators and secondary operation and maintenance energy efficiency evaluation indicators;

[0031] A third-level evaluation index module, which is used to determine the third-level evaluation index and the third-level evaluation index score based on the second-level evaluation index, wherein the third-level evaluation index includes the third-level design energy efficiency evaluation index, the third-level operation and maintenance energy efficiency evaluation index, and the third-level innovation energy efficiency evaluation index; and

[0032] The building electrical system energy efficiency rating evaluation module is used to determine the score of the building electrical system to be evaluated based on the above-mentioned indicators and scores at each level, and thus divide the building electrical system energy efficiency level.

[0033] The present invention also provides an electronic device, characterized in that it comprises: a memory and one or more processors;

[0034] The memory is used to store one or more programs;

[0035] When the one or more programs are executed by the one or more processors, the one or more processors implement the method described in the present invention.

[0036] In combination with the characteristics of engineering project design and operation in my country, the present invention proposes the first quantitative energy efficiency evaluation method for building electrical systems in accordance with the above methods and steps. It analyzes and evaluates from three aspects: design energy efficiency, operation and maintenance energy efficiency, and innovation energy efficiency. It covers the electrical energy consumption of the building throughout its life cycle, divides the energy efficiency level of the building electrical system, and can promote the improvement of the energy efficiency of the building electrical system. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of a building electrical energy efficiency evaluation method according to an embodiment of the present invention;

[0038] Figure 2 A schematic diagram of the structure of a building electrical energy efficiency evaluation device according to an embodiment of the present invention; and

[0039] Figure 3 Schematic diagram of the structure of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings. The shown contents are used to fully illustrate the contents of the present invention, but are not used to limit the present invention.

[0041] Figure 1 This is a flow chart of a building electrical energy efficiency evaluation method according to an embodiment of the present invention. As shown in the figure, the building electrical energy efficiency evaluation method according to the embodiment may include the following steps:

[0042] First, the building types are classified. The building types in this invention include industrial buildings and public buildings, which are applicable to new and existing projects. For residential buildings, the characteristics of residential buildings are that users have different electricity usage habits and needs, and they are more dependent on user behavior energy saving, so they are not considered in this article.

[0043] Second, determine the first-level evaluation indicators and scores. The first-level evaluation indicators include: design energy efficiency, operation and maintenance energy efficiency, and innovation energy efficiency. That is, analysis and evaluation are conducted from the three aspects of design, operation and maintenance, and innovation, covering the electrical energy consumption of the entire life cycle of the building. In the implementation plan, the scores of each first-level evaluation indicator are as follows: design energy efficiency 50 points, operation and maintenance energy efficiency 40 points, and innovation energy efficiency 10 points.

[0044] Third, determine the secondary evaluation indicators and scores.

[0045] On the basis of the first-level evaluation indicators, the second-level evaluation indicators and the scores of the second-level evaluation indicators are determined. More specifically, the second-level evaluation indicators include the second-level design energy efficiency evaluation indicators and the second-level operation and maintenance energy efficiency evaluation indicators. Among them, the second-level design energy efficiency evaluation indicators include: substation, power distribution system, lighting system, building electrical energy efficiency management system. The second-level operation and maintenance energy efficiency evaluation indicators include: power distribution system, lighting system, building electrical energy efficiency management system, and full life cycle operation and maintenance.

[0046] The second-level evaluation indicators are a further division of the first-level evaluation indicators, dividing design and operation and maintenance into subsystems.

[0047] Afterwards, determine the scores of the secondary evaluation indicators.

[0048] Regarding the secondary design energy efficiency evaluation indicators, the total score is 50 points. For industrial buildings: 12 points for substation, 15 points for power distribution system, 8 points for lighting system, and 15 points for building electrical energy efficiency management system; for public buildings, 10 points for substation, 15 points for power distribution system, 10 points for lighting system, and 15 points for building electrical energy efficiency management system.

[0049] Regarding the secondary operation and maintenance energy efficiency evaluation indicators, the total score is 40 points. For industrial buildings: power distribution system 12 points, lighting system 6 points, building electrical energy efficiency management system 16 points, full life cycle operation and maintenance 6 points; power distribution system 10 points, lighting system 7 points, building electrical energy efficiency management system 17 points, full life cycle operation and maintenance 6 points.

[0050] Industrial buildings and public buildings have different characteristics. Considering the potential for energy efficiency improvement in lighting systems and energy efficiency management systems, the scores of public buildings are slightly higher than those of industrial buildings. Accordingly, the scores of substations in public buildings are lower than those of industrial buildings.

[0051] Fourth, determine the three-level evaluation indicators and scores.

[0052] On the basis of the secondary evaluation indicators, determine the tertiary evaluation indicators and the scores of the tertiary evaluation indicators.

[0053] The three-level evaluation indicators include three-level design energy efficiency evaluation indicators, three-level operation and maintenance energy efficiency evaluation indicators, and three-level innovation energy efficiency evaluation indicators. Furthermore, the three-level design energy efficiency evaluation indicators include: three-level evaluation indicators for design energy efficiency substations, three-level evaluation indicators for design energy efficiency distribution systems, three-level evaluation indicators for design energy efficiency lighting systems, and three-level evaluation indicators for design energy efficiency building electrical energy efficiency management systems. The three-level operation and maintenance energy efficiency evaluation indicators include: three-level evaluation indicators for operation and maintenance energy efficiency distribution systems, three-level evaluation indicators for operation and maintenance energy efficiency lighting systems, three-level evaluation indicators for operation and maintenance energy efficiency building electrical management systems, and three-level evaluation indicators for operation and maintenance energy efficiency throughout the life cycle. The three-level innovation energy efficiency evaluation indicators include: renewable energy generation rate, electric energy storage system, DC distribution system, and building electricity flexibility.

[0054] More specifically, the three-level evaluation indicators for designing energy-efficient substations include: energy distance of building electrical systems, location of substations, energy efficiency of distribution transformers, and supply voltage level. The three-level evaluation indicators for designing energy-efficient distribution systems include: electrical grid division, electrical grid coverage, electrical system load shedding coverage, single load shedding duration, energy efficiency of electrical equipment, reactive power compensation, and harmonic control measures. The three-level evaluation indicators for designing energy-efficient lighting systems include: energy efficiency of lighting products, lighting power density, lighting automatic control measures, and lighting automatic control coverage. The three-level evaluation indicators for designing energy-efficient building electrical energy efficiency management systems include: energy consumption sub-item metering, zone metering, building electrical energy efficiency management system, measurement / detection equipment settings, metering equipment accuracy, personnel detection measures, and ventilation, air conditioning, and water supply and drainage equipment control.

[0055] The three-level evaluation indicators of the energy efficiency distribution system for operation and maintenance include: transformer operation energy efficiency, motor equipment energy efficiency level, power factor, harmonic distortion rate, average voltage drop of the electrical system, and PCC negative sequence voltage imbalance. The three-level evaluation indicators of the energy efficiency lighting system for operation and maintenance include: lighting equipment, lighting control, illumination and lighting power density. The three-level evaluation indicators of the energy efficiency building electrical management system for operation and maintenance include: sub-item metering coverage, zoned energy consumption metering coverage, electrical energy consumption management system coverage, building occupancy detection system, and air conditioning power system control precision. The three-level evaluation indicators of the energy efficiency operation and maintenance throughout the life cycle include: energy consumption audit analysis, energy efficiency measures, replacement of low-efficiency equipment, operation and maintenance procedures and management, and visual operation and maintenance platform.

[0056] The three-level evaluation indicators of innovative energy efficiency include: renewable energy generation rate, electric energy storage system, DC distribution system and building electricity flexibility.

[0057] The third-level evaluation indicators are a further refinement of the second-level evaluation indicators. Each subsystem divided by the first-level evaluation indicators is refined into third-level evaluation indicators according to its key energy efficiency points.

[0058] Afterwards, determine the scores of the three-level evaluation indicators.

[0059] 1. Three-level evaluation indicators for designing energy-efficient substations:

[0060] For industrial buildings, the design of energy-efficient substations (12 points): 3 points for building electrical system energy distance, 5 points for substation location, 3 points for distribution transformer energy efficiency, and 1 point for power supply voltage level; for public buildings, the design of energy-efficient substations (10 points): 3 points for building electrical system energy distance, 3 points for substation location, 3 points for distribution transformer energy efficiency, and 1 point for power supply voltage level. The three-level evaluation index of energy-efficient substations for public buildings is two points lower than that of industrial buildings.

[0061] For industrial buildings, the design of energy-efficient power distribution system (15 points): 2 points for electrical grid division, 4 points for electrical grid coverage, 2 points for electrical system load shedding coverage, 1 point for load shedding duration, 4 points for electrical equipment energy efficiency, 1 point for reactive power compensation, and 1 point for harmonic control measures. For public buildings, the design of energy-efficient power distribution system (15 points): 2 points for electrical grid division, 4 points for electrical grid coverage, 2 points for electrical system load shedding coverage, 1 point for load shedding duration, 4 points for electrical equipment energy efficiency, 1 point for reactive power compensation, and 1 point for harmonic control measures. The three-level evaluation index scores for energy-efficient power distribution system design for public buildings are exactly the same as those for industrial buildings.

[0062] For industrial buildings, the energy-efficient lighting system is designed (8 points): 3 points for lighting product energy efficiency, 2 points for lighting power density, 1 point for lighting automatic control measures, and 2 points for lighting automatic control coverage. For public buildings, the energy-efficient lighting system is designed (10 points): 3 points for lighting product energy efficiency, 3 points for lighting power density, 2 points for lighting automatic control measures, and 2 points for lighting automatic control coverage. The three-level evaluation index of the energy-efficient lighting system designed for public buildings is one point higher in lighting power density than that of industrial buildings, and one point higher in lighting automatic control measures than that of industrial buildings.

[0063] For industrial buildings, the design of energy-efficient building electrical energy efficiency management system (15 points): 2 points for energy consumption sub-item measurement, 2 points for zone measurement, 2 points for building electrical energy efficiency management system, 3 points for measurement / testing equipment setting, 2 points for metering equipment accuracy, 1 point for personnel detection measures, and 3 points for ventilation, air conditioning, water supply and drainage equipment control. For public buildings, the design of energy-efficient building electrical energy efficiency management system (15 points): 2 points for energy consumption sub-item measurement, 2 points for zone measurement, 2 points for building electrical energy efficiency management system, 3 points for measurement / testing equipment setting, 2 points for metering equipment accuracy, 1 point for personnel detection measures, and 3 points for ventilation, air conditioning, water supply and drainage equipment control. The three-level evaluation index scores of the energy-efficient building electrical energy efficiency management system for public buildings are exactly the same as those for industrial buildings.

[0064] 2. Three-level evaluation indicators for operation and maintenance of energy-efficient power distribution systems:

[0065] For industrial buildings, the operation and maintenance energy efficiency distribution system (12 points): 3 points for transformer operation energy efficiency, 2 points for motor equipment energy efficiency level, 1 point for power factor, 4 points for harmonic distortion rate, 1 point for average voltage drop of electrical system, and 1 point for PCC negative sequence voltage imbalance. For public buildings, the operation and maintenance energy efficiency distribution system (10 points): 2 points for transformer operation energy efficiency, 1 point for motor equipment energy efficiency level, 1 point for power factor, 4 points for harmonic distortion rate, 1 point for average voltage drop of electrical system, and 1 point for PCC negative sequence voltage imbalance. The three-level evaluation index of the operation and maintenance energy efficiency distribution system of public buildings is one point lower than that of industrial buildings in terms of transformer operation energy efficiency, and one point lower than that of industrial buildings in terms of motor equipment energy efficiency.

[0066] For industrial buildings, the operation and maintenance of energy-efficient lighting systems (6 points): lighting equipment 2 points, lighting control 2 points, illuminance and lighting power density 2 points. For public buildings, the operation and maintenance of energy-efficient lighting systems (7 points): lighting equipment 2 points, lighting control 2 points, illuminance and lighting power density 3 points. The three-level evaluation indicators of the operation and maintenance of energy-efficient lighting systems for public buildings, illuminance and lighting power density, are one point higher than those for industrial buildings.

[0067] For industrial buildings, the operation and maintenance of energy-efficient building electrical management system (16 points): 4 points for sub-item metering coverage, 4 points for zoned energy consumption metering coverage, 4 points for electrical energy consumption management system coverage, 1 point for building occupancy detection system, and 3 points for air conditioning power system control precision. For public buildings, the operation and maintenance of energy-efficient building electrical management system (17 points): 5 points for sub-item metering coverage, 4 points for zoned energy consumption metering coverage, 4 points for electrical energy consumption management system coverage, 1 point for building occupancy detection system, and 3 points for air conditioning power system control precision. The sub-item metering coverage of the three-level evaluation indicators of the operation and maintenance energy-efficient building electrical management system for public buildings is one point higher than that of industrial buildings.

[0068] For industrial buildings, operation and maintenance energy efficiency full life cycle operation and maintenance (6 points): 1 point for energy consumption audit analysis, 1 point for energy efficiency measures, 1 point for replacement of low-efficiency equipment, 2 points for operation and maintenance procedures and management, and 1 point for visual operation and maintenance platform. For public buildings, operation and maintenance energy efficiency full life cycle operation and maintenance (6 points): 1 point for energy consumption audit analysis, 1 point for energy efficiency measures, 1 point for replacement of low-efficiency equipment, 2 points for operation and maintenance procedures and management, and 1 point for visual operation and maintenance platform. The three-level evaluation index scores for the operation and maintenance energy efficiency full life cycle operation and maintenance of public buildings are exactly the same as those for industrial buildings.

[0069] 3. About the three-level innovation energy efficiency evaluation indicators

[0070] For industrial buildings, innovative energy efficiency (10 points): 4 points for renewable energy generation rate, 3 points for electric energy storage system, 1 point for DC power distribution system, and 2 points for building power flexibility. For public buildings, innovative energy efficiency (10 points): 4 points for renewable energy generation rate, 3 points for electric energy storage system, 1 point for DC power distribution system, and 2 points for building power flexibility. The three-level evaluation index scores for innovative energy efficiency of public buildings are exactly the same as those for industrial buildings.

[0071] Fifth, the energy efficiency level of the building electrical system is divided according to the total evaluation score.

[0072] The total score should be calculated by dividing the actual score of the evaluation index by the total score of the scoring items applicable to the building, and then multiplying it by the full score of 100. For example, if there is no transformer in a participating building, the total score applicable to the building should not include the score of the inverter-related scoring items in this standard, that is, 99 points. If the actual evaluation score of the building is 59 points, the final score should be 59×100÷99=60 points.

[0073] If the total evaluation score is 60≤Pts<70, the electrical system energy efficiency level is level 1; if the total evaluation score is 70≤Pts<85, the electrical system energy efficiency level is level 2; if the total evaluation score is 85≤Pts<100, the electrical system energy efficiency level is level 3. The higher the score, the higher the level, indicating that the electrical system energy efficiency is better.

[0074] In order to further illustrate the scientific nature of the method system of the present invention and the advanced technology, the basis of the three-level evaluation index of the present invention is elaborated in detail below.

[0075] a. Building electrical system energy distance. Calculate the building electrical system energy distance based on the actual energy moment of the substation, the number of substations in the building, and the annual power consumption of the electrical system, and score it based on its size.

[0076] b. Substation location. Calculate the energy distance and ideal energy distance based on the substation, and calculate the energy efficiency index of each substation location; calculate the comprehensive energy efficiency index of all substation locations in the building based on the number of substations, the annual power consumption of the substation power supply load, and the annual total power consumption of the electrical system, and score them according to their size.

[0077] c. Distribution transformer energy efficiency: The rating is based on whether the distribution transformer has primary or secondary energy efficiency.

[0078] d. Power supply voltage level. When the capacity of a single power-consuming device is 250kW or above or the installed capacity of a single building transformer is 160kVA or above, 1 point will be awarded if the power supply is 6kV or above.

[0079] e. Division of electrical grids. The electrical grids shall be divided according to the nature of the electrical equipment, the room or area where it is located, the control method, the operating conditions, the operating conditions, etc., according to each criterion, and the total power consumption of the electrical equipment covered by the electrical grid shall not be less than 50% of the total power consumption of the building electrical system. The score shall be based on the number of criteria.

[0080] f. Electrical grid coverage. The electrical grid coverage is calculated based on the sum of the annual electricity consumption of the electrical grid and the annual total electricity consumption of the electrical system, and the score is calculated based on its size.

[0081] g. Coverage of load shedding in the electrical system. The coverage of load shedding is calculated based on the total installed power of the electrical equipment that can interrupt power supply and the total installed power of the electrical system, and the load shedding coverage is scored based on its size.

[0082] h. The duration of a single load shedding: Score based on the duration of a single load shedding. If the duration is greater than or equal to 30 minutes, 1 point is awarded.

[0083] i. Energy efficiency of electrical equipment. According to the energy-saving measures adopted by the elevator, such as group control, variable frequency speed regulation, energy feedback, variable frequency induction start, etc., all low-voltage variable frequency speed regulation equipment uses high-efficiency products, and low-voltage AC motors configured for water pumps, fans and other equipment use high-efficiency products, and score according to energy-saving measures and equipment energy efficiency level.

[0084] j. Reactive power compensation. If reactive power compensation measures are taken to achieve a low-voltage side power factor greater than or equal to 0.95 during the design phase, 1 point will be awarded.

[0085] k. Harmonic control measures: 1 point will be awarded for adopting harmonic control measures during the design phase.

[0086] l. Energy efficiency of lighting products. The energy efficiency rating of the lighting product’s light source and ballast and other driving power supply devices, the energy efficiency rating of LED lighting products, and the efficiency or effectiveness of the lamps are scored.

[0087] m. Lighting power density. Calculate the energy efficiency index of the room lighting power density based on the design value of the room lighting power density and the lighting power density limit in the current specifications, and score it based on its size.

[0088] n. Automatic lighting control measures. If control measures are adopted to automatically reduce the illumination in corridors, stairwells, toilets, water rooms, underground garages, foyers, lobbies, elevator halls, etc., 1 point will be awarded. If measures are adopted in areas of public buildings with natural lighting that can be automatically controlled as the illumination changes, 1 point will be awarded.

[0089] o. Lighting automatic control coverage. The lighting automatic control coverage is calculated based on the number of lighting circuits that can be automatically controlled in the public area and the total number of lighting circuits in the public area, and the score is calculated based on its size.

[0090] p. Energy consumption is measured by item. If the electricity consumption of a building is measured by item, such as electricity consumption of exposed sockets, electricity consumption of air conditioners, electricity consumption of power, and electricity consumption of special items, 1 point will be awarded. If a single unit (group) of electrical equipment with a capacity of not less than 55kW is measured separately, 1 point will be awarded.

[0091] q. Area measurement. Industrial buildings are measured by different functional areas such as office, workshop, warehouse, corridor, etc., and 1 point is awarded. Industrial buildings are measured by different user units or process production processes, and 1 point is awarded. Public buildings are measured by different functional areas such as office, commercial, public area, equipment area, underground garage, etc., and 1 point is awarded. Public buildings are measured by floor or user unit, and 1 point is awarded.

[0092] r. Building electrical energy efficiency management system. 2 points will be awarded for setting up a building electrical energy efficiency management system.

[0093] s. Measurement / detection equipment settings. If metering and monitoring devices are installed at the mains power supply line, generator line, etc. and meet the functions of PMD-3, 1 point will be awarded. If metering and monitoring devices are installed at the low-voltage distribution cabinet outgoing line circuit and meet the functions of PMD-2, 1 point will be awarded. If metering and monitoring devices are installed in the area and electrical grid and meet the functions of PMD-1, 1 point will be awarded.

[0094] t. Accuracy of measuring equipment. If a digital instrument with a communication interface is used, 1 point will be awarded. If the accuracy level of the electronic measuring device is not less than 1.0, 1 point will be awarded.

[0095] u. Personnel detection measures: 1 point is awarded for detecting people in buildings and obtaining the number of people in a building or a certain area through technical means.

[0096] v. Ventilation, air conditioning, water supply and drainage equipment control. When a building is equipped with a building equipment monitoring system, the air conditioning and power systems are automatically controlled to operate in an energy-saving state, and 3 points are awarded. When a building is not equipped with a building equipment monitoring system, the control measures for air conditioning, power, and major energy-consuming equipment are scored.

[0097] w. Transformer operation energy efficiency. Based on the number of transformers operating in the best economic operation area in the building electrical system and the total number of transformers in the building electrical system, the comprehensive economic operation index of the transformer is calculated and scored according to its size.

[0098] x. Energy efficiency level of motor equipment: Points will be awarded if the total rated power of motors with energy efficiency level 2 or above in the building is not less than 90% of the total rated power of all motors.

[0099] y. Power factor. If the power factor at the incoming electrical system is greater than or equal to 0.95, 1 point will be awarded.

[0100] z. Harmonic distortion rate. Score based on the total voltage harmonic distortion rate and total current harmonic distortion rate.

[0101] aa. Average voltage drop of the electrical system. Based on the voltage drop of the circuit and the annual power consumption of the circuit, the average line loss of the electrical system is calculated and scored according to its size.

[0102] bb. PCC negative sequence voltage imbalance. When the power grid is operating normally, the negative sequence voltage imbalance of the power system common connection point is measured on site. If the measurement result does not exceed 2% and does not exceed 4% in a short time, 1 point will be awarded.

[0103] cc. Lighting equipment. The lighting equipment efficiency is calculated based on the installed power of the installed lighting equipment, the installed power of more efficient lighting equipment, and is scored according to its size.

[0104] dd. Lighting control. Automatic switch control or dimming measures are used in corridors, stairwells, toilets, water rooms, and underground garages. Timed automatic illumination reduction measures are used in foyer, lobby, and elevator hall during non-working hours. In places where natural lighting can be used, the illumination is automatically adjusted as the natural light intensity changes. The lighting control system has information collection functions and multiple control methods, and can set control modes for different scenarios. Score according to the number of control measures taken.

[0105] ee. Illuminance and lighting power density. Sampling tests shall be conducted on the illumination and lighting power density of each typical room or place in the building, with a sampling ratio of not less than 5%. When the illumination of the tested room or place meets the relevant requirements and the lighting power density is not higher than the limit specified in the General Specification for Energy Conservation and Renewable Energy Utilization in Buildings GB 55015, it shall be deemed qualified. When the sampling test rationality rate is 100%, full marks shall be awarded.

[0106] ff. Sub-item metering coverage. Based on the annual power consumption of the loads that adopt sub-item metering and the annual total power consumption of the electrical system, the sub-item metering coverage of the electrical system is calculated and scored according to its size.

[0107] gg. District energy consumption metering coverage. Based on the annual power consumption of the loads that adopt district energy consumption metering in the building and the annual total power consumption of the electrical system, the district energy consumption metering coverage is calculated and scored according to its size.

[0108] hh. Coverage of the electrical energy efficiency management system. The coverage of the energy efficiency management system is calculated based on the annual power consumption of the loads managed by the electrical energy efficiency management system and the annual total power consumption of the electrical system, and a score is given based on its size.

[0109] ii. Building occupancy detection system. 1 point if the system can detect occupancy.

[0110] jj. Control precision of air conditioning and power systems. If the air conditioning system is set with temperature control and the ventilation system is set with time control, 1 point will be awarded. If the air conditioning and power systems are set with energy-saving automatic control measures, and the main electrical equipment and main functional rooms are all energy-saving controlled, 2 points will be awarded.

[0111] kk. Energy consumption audit analysis. 1 point for conducting periodic audits and data application analysis of building energy consumption and forming reports.

[0112] l l. Energy efficiency measures. Based on the results of energy consumption monitoring, measures and plans to improve the energy efficiency of the system are formulated, which will be awarded 1 point.

[0113] mm. Replacement of inefficient equipment. If inefficient equipment is replaced or upgraded, and the proportion of high-efficiency equipment after replacement or upgrade reaches more than 80% of the total number, 1 point will be awarded.

[0114] nn. Operation and maintenance procedures and management. 1 point will be awarded for establishing monitoring methods for the operating status of equipment and facilities, fault diagnosis and treatment methods, and energy-saving operation procedures. 1 point will be awarded for formulating periodic maintenance plans and methods for the maintenance of facilities and equipment.

[0115] oo. Visual operation and maintenance platform. The digital visual operation and maintenance management platform is adopted to improve the operation and maintenance efficiency, and 1 point is awarded.

[0116] pp. Renewable energy generation rate. The utilization rate of renewable energy generation is calculated based on the annual power generation of renewable energy and the annual total power consumption of the electrical system, and a score is given based on its size.

[0117] qq.Electric energy storage system. The installation rate of the electric energy storage system is calculated based on the amount of electricity stored in the electric energy storage system and the average daily power consumption of the building, and the system is scored based on its size.

[0118] rr. DC power distribution system. 1 point is awarded if a DC power distribution system is installed and the annual power consumption of the DC power distribution system is not less than 3% of the total annual power consumption of the building electrical system.

[0119] ss. Building power flexibility. For industrial buildings, the power flexibility of the equipment is calculated based on the operating power of the equipment's flexible adjustment signal and the rated power of the equipment. If it is greater than or equal to 5%, 1 point is awarded. For public buildings, the power flexibility of the building in a certain period of time is calculated based on the operating power of the building's flexible adjustment signal and the power consumption of the building in a certain period of time without a flexible adjustment signal. If it is greater than or equal to 5%, 1 point is awarded.

[0120] Figure 2 Schematic diagram of a building electrical energy efficiency evaluation device according to an embodiment of the present invention. Figure 2As shown, the device includes: a building type classification module 210, which is used to classify building types, including public buildings and industrial buildings; a first-level evaluation index module 220, which is used to determine the first-level evaluation index and the first-level evaluation index score, wherein the first-level evaluation index includes the first-level design energy efficiency evaluation index, the first-level operation and maintenance energy efficiency evaluation index, and the first-level innovation energy efficiency evaluation index; a second-level evaluation index module 230, which is used to determine the second-level evaluation index and the second-level evaluation index score on the basis of the first-level evaluation index, wherein the second-level evaluation index includes the second-level design energy efficiency evaluation index and the second-level operation and maintenance energy efficiency evaluation index; a third-level evaluation index module 240, which is used to determine the third-level evaluation index and the third-level evaluation index score on the basis of the second-level evaluation index, wherein the third-level evaluation index includes the third-level design energy efficiency evaluation index, the third-level operation and maintenance energy efficiency evaluation index, and the third-level innovation energy efficiency evaluation index; a building electrical system energy efficiency grade evaluation module 250, which is used to determine the score of the building electrical system to be evaluated according to the above-mentioned indicators and scores at each level, thereby dividing the building electrical system energy efficiency grade.

[0121] Figure 3 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention is shown in FIG. Figure 3 As shown, the electronic device includes a processor 310, a memory 320, an input device 330 and an output device 340; the number of the processor 310 in the electronic device can be one or more. Figure 3 A processor 310 is taken as an example; the processor 310, the memory 320, the input device 330 and the output device 340 in the electronic device can be connected via a bus or other means. Figure 3 The example of connecting through bus is taken in the following.

[0122] The memory 320, as a computer-readable storage medium, can be used to store software programs, computer executable programs and modules, such as program instructions / modules corresponding to the building electrical energy efficiency evaluation method in the embodiment of the present invention (for example, the building type classification module 210, the first-level evaluation index module 220, the second-level evaluation index module 230, the third-level evaluation index module 240 and the building electrical system energy efficiency rating evaluation module 250). The processor 310 executes various functional applications and data processing of the electronic device by running the software programs, instructions and modules stored in the memory 320, that is, realizes the above-mentioned building electrical energy efficiency evaluation method.

[0123] The memory 320 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the terminal, etc. In addition, the memory 320 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some instances, the memory 320 may further include a memory remotely arranged relative to the processor 310, and these remote memories may be connected to the electronic device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The input device 330 may be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the electronic device. The output device 340 may include a display device such as a display screen.

[0124] The above description of the embodiments is to facilitate the understanding and application of the present invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the embodiments herein, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A method for evaluating energy efficiency of a building electrical system, characterized in that: The steps include: Step 1, classify the building types, including public buildings and industrial buildings; Step 2, determining the first-level evaluation indicators and the first-level evaluation indicator scores, wherein the first-level evaluation indicators include the first-level design energy efficiency evaluation indicators, the first-level operation and maintenance energy efficiency evaluation indicators, and the first-level innovation energy efficiency evaluation indicators; Step 3: Based on the first-level evaluation indicators, determine the second-level evaluation indicators and the scores of the second-level evaluation indicators. The second-level evaluation indicators include the second-level design energy efficiency evaluation indicators and the second-level operation and maintenance energy efficiency evaluation indicators. Step 4: Based on the secondary evaluation indicators, determine the tertiary evaluation indicators and their scores. The tertiary evaluation indicators include the tertiary design energy efficiency evaluation indicators, the tertiary operation and maintenance energy efficiency evaluation indicators, and the tertiary innovation energy efficiency evaluation indicators. as well as Step 5: Determine the score of the building electrical system to be evaluated based on the above indicators and scores at each level, and then classify the energy efficiency level of the building electrical system.

2. A building electrical system energy efficiency evaluation method according to claim 1, characterized in that: In step 2, the score of each first-level evaluation index is: 50 points for the first-level design energy efficiency evaluation index, 40 points for the first-level operation and maintenance energy efficiency evaluation index, and 10 points for the first-level innovation energy efficiency evaluation index.

3. A building electrical system energy efficiency evaluation method according to claim 1, characterized in that: In step 3, the secondary design energy efficiency evaluation indicators include: secondary evaluation indicators for designing energy-efficient substations, secondary evaluation indicators for designing energy-efficient power distribution systems, secondary evaluation indicators for designing energy-efficient lighting systems, and secondary evaluation indicators for designing energy-efficient building electrical energy efficiency management systems; for industrial buildings, the scores are 12 points, 15 points, 8 points, and 15 points respectively; for public buildings, the scores are 10 points, 15 points, 10 points, and 15 points respectively; the total score is 50 points.

4. A building electrical system energy efficiency evaluation method according to claim 1, characterized in that: In step 3, the secondary operation and maintenance energy efficiency evaluation indicators include: operation and maintenance energy efficiency distribution system secondary evaluation indicators, operation and maintenance energy efficiency lighting system secondary evaluation indicators, operation and maintenance energy efficiency building electrical energy efficiency management system secondary evaluation indicators, operation and maintenance energy efficiency full life cycle operation and maintenance secondary evaluation indicators; for industrial buildings, the scores are: 12 points, 6 points, 16 points, and 6 points respectively; for public buildings, the scores are 10 points, 7 points, 17 points, and 6 points respectively; the total score is 40 points.

5. A building electrical system energy efficiency evaluation method according to claim 1, characterized in that: The three-level design energy efficiency evaluation indicators include: three-level evaluation indicators for designing energy-efficient substations, three-level evaluation indicators for designing energy-efficient distribution systems, three-level evaluation indicators for designing energy-efficient lighting systems, and three-level evaluation indicators for designing energy-efficient building electrical energy efficiency management systems.

6. A building electrical system energy efficiency evaluation method according to claim 1, characterized in that: The three-level operation and maintenance energy efficiency evaluation indicators include: the three-level evaluation indicators of operation and maintenance energy distribution system, the three-level evaluation indicators of operation and maintenance energy efficiency lighting system, the three-level evaluation indicators of operation and maintenance energy efficiency building electrical management system and the three-level evaluation indicators of operation and maintenance energy efficiency full life cycle operation and maintenance.

7. A building electrical system energy efficiency evaluation method according to claim 1, characterized in that The three-level innovation energy efficiency evaluation indicators include: renewable energy power generation rate, electric energy storage system, DC distribution system, and building electricity flexibility, with scores of 4 points, 3 points, 1 point, and 2 points respectively; a total of 10 points.

8. A building electrical system energy efficiency evaluation method according to claim 5, characterized in that: The three-level evaluation indicators for designing energy-efficient substations include: building electrical system energy distance, substation location, distribution transformer energy efficiency, and power supply voltage level. For industrial buildings, the scores are 3 points, 5 points, 3 points, and 1 point, totaling 12 points; for public buildings, the scores are 3 points, 3 points, 3 points, and 1 point, totaling 10 points. The three-level evaluation indicators for designing energy-efficient power distribution systems include: electrical grid division, electrical grid coverage, electrical system load shedding coverage, load shedding duration, electrical equipment energy efficiency, reactive power compensation, and harmonic control measures, with scores of 2 points, 4 points, 2 points, 1 point, 4 points, 1 point, and 1 point, for a total of 15 points. The three-level evaluation indicators for designing energy-efficient lighting systems include: lighting product energy efficiency, lighting power density, lighting automatic control measures, and lighting automatic control coverage; for industrial buildings, the scores are 3 points, 2 points, 1 point, and 2 points, totaling 8 points; for public buildings, the scores are 3 points, 3 points, 2 points, and 2 points, totaling 10 points; The three-level evaluation indicators for designing energy-efficient building electrical energy efficiency management systems include: energy consumption sub-item metering, zone metering, building electrical energy efficiency management system, measurement / detection equipment settings, metering equipment accuracy, personnel detection measures, ventilation and air-conditioning water supply and drainage equipment control; the scores are 2 points, 2 points, 2 points, 3 points, 2 points, 1 point and 3 points respectively, totaling 15 points.

9. A building electrical system energy efficiency evaluation method according to claim 6, characterized in that: The three-level evaluation indicators of the operation and maintenance energy efficiency distribution system include: transformer operation energy efficiency, motor equipment energy efficiency level, power factor, harmonic distortion rate, electrical system average voltage drop, PCC negative sequence voltage imbalance. For industrial buildings, the scores are 3 points, 2 points, 1 point, 4 points, 1 point, and 1 point, respectively, for a total of 12 points; for public buildings, the scores are 2 points, 1 point, 1 point, 4 points, 1 point, and 1 point, respectively, for a total of 10 points; The three-level evaluation indicators of the operation and maintenance energy efficiency lighting system include: lighting equipment, lighting control, illumination and lighting power density. For industrial buildings, the scores are 2 points, 2 points, and 2 points respectively, with a total of 6 points; for public buildings, the scores are 2 points, 2 points, and 3 points respectively, with a total of 7 points; The three-level evaluation indicators of the operation and maintenance energy-efficient building electrical management system include the coverage of sub-item metering, the coverage of zoned energy consumption metering, the coverage of the electrical energy consumption management system, the building occupancy detection system, and the control precision of the air-conditioning power system. For industrial buildings, the scores are 4 points, 4 points, 4 points, 1 point, and 3 points, respectively, for a total of 16 points; for public buildings, the scores are 5 points, 4 points, 4 points, 1 point, and 3 points, respectively, for a total of 17 points; and The three-level evaluation indicators for operation and maintenance energy efficiency throughout the life cycle include energy consumption audit analysis, energy efficiency measures, replacement of inefficient equipment, operation and maintenance procedures and management, and visual operation and maintenance platform, with scores of 1 point, 1 point, 1 point, 2 points, and 1 point respectively, totaling 6 points.

10. A building electrical system energy efficiency evaluation method according to claim 1, characterized in that: According to the total score and the following standards, the energy efficiency level of the building electrical system is divided into level one, level two and level three: if the total evaluation score is 60≤Pts<70, the electrical system energy efficiency level is level one; if the total evaluation score is 70≤Pts<85, the electrical system energy efficiency level is level two; if the total evaluation score is 85≤Pts<100, the electrical system energy efficiency level is level three.

11. A building electrical system energy efficiency evaluation device, characterized in that: include: Building type classification module, used to classify building types, including public buildings and industrial buildings; A first-level evaluation index module, used to determine first-level evaluation indicators and first-level evaluation index scores, wherein the first-level evaluation indicators include first-level design energy efficiency evaluation indicators, first-level operation and maintenance energy efficiency evaluation indicators, and first-level innovation energy efficiency evaluation indicators; A secondary evaluation index module is used to determine secondary evaluation indicators and secondary evaluation index scores based on the primary evaluation indicators, wherein the secondary evaluation indicators include secondary design energy efficiency evaluation indicators and secondary operation and maintenance energy efficiency evaluation indicators; A three-level evaluation index module, which is used to determine the third-level evaluation index and the third-level evaluation index score based on the second-level evaluation index, wherein the third-level evaluation index includes the third-level design energy efficiency evaluation index, the third-level operation and maintenance energy efficiency evaluation index and the third-level innovation energy efficiency evaluation index; as well as The building electrical system energy efficiency rating evaluation module is used to determine the score of the building electrical system to be evaluated based on the above-mentioned indicators and scores at each level, and thus divide the building electrical system energy efficiency level.

12. An electronic device, characterized in that: include: memory and one or more processors; The memory is used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 10.

Images