Construction site intelligent power utilization system design method

Abstract

The invention provides a construction site intelligent power utilization system design method, and belongs to the field of intelligent energy management. Comprising the steps of calculating a project electricity peak value and a conventional load, selecting a transformer according to the conventional load, and determining an energy storage cabinet according to a difference value; after the energy storage cabinet and the transformer are connected in parallel to form a network, an intelligent electric meter is independently arranged in a secondary distribution box; an intelligent control system is integrated in an energy storage cabinet, the intelligent control system monitors the electricity consumption condition of each intelligent electric meter, the total load power and energy consumption cost data of the current electricity consumption demand are automatically calculated according to a preset electricity pricing rule and the electricity consumption condition of each intelligent electric meter, and if the total load power of the current electricity consumption demand is larger than or equal to the capacity of a transformer, the transformer is started. If yes, controlling the energy storage cabinet to automatically discharge and supplement; and if the total load power of the current electricity demand is smaller than the capacity of the transformer, an energy storage cabinet charging or discharging suggestion is pushed to the mobile terminal equipment, and an operator remotely controls charging or discharging of the energy storage cabinet by operating the mobile terminal equipment according to the on-site construction arrangement.

Description

Technical Field

[0001] The present invention relates to the technical field of smart energy management, and in particular to a design method for a smart power consumption system at a construction site. Background Art

[0002] In the rapidly developing modern construction industry, especially for large infrastructure projects such as bridge projects, the management of power demand at construction sites has become an urgent problem to be solved. At present, the domestic power market generally adopts a step-by-step pricing plus time-of-use electricity price mechanism, which aims to promote the rational allocation and efficient use of power resources through economic means. However, this pricing model faces many challenges in the field of construction engineering, especially in the management of temporary power consumption at construction sites.

[0003] First, the temporary power consumption characteristics of construction sites are significant, with large fluctuations in power consumption, strong temporary demand and concentrated peak periods. For example, during the pile foundation construction phase of a bridge project, power demand rises sharply, while it drops significantly during the subsequent construction phase. This power consumption pattern requires the temporary power supply system to be highly flexible and adaptable to cope with rapidly changing load demands.

[0004] Secondly, traditional temporary power design is often conservatively selected based on construction peak load, resulting in over-capacity configuration of key equipment such as transformers. Although this design strategy ensures the stability of power supply during peak periods, as the construction progresses, the actual power load gradually decreases, and a large amount of transformer capacity is idle, resulting in a huge waste of power resources. At the same time, due to the restrictions of electricity pricing rules, even if the actual power consumption is far lower than the design capacity, the company still needs to bear higher fixed electricity costs, which increases construction costs.

[0005] Furthermore, with the continuous development of smart grid technology, the level of refined management of the power market has been continuously improved, providing new opportunities for the optimized management of temporary power consumption at construction sites. However, the current temporary power consumption management system at construction sites generally lacks intelligent and automated means, making it difficult to achieve refined scheduling and efficient use of power resources.

[0006] Therefore, in response to the above problems, the present invention proposes a design method for a smart power consumption system at a construction site, aiming to reduce the investment in temporary power consumption infrastructure at the construction site, improve the utilization rate of transformers, and reduce electricity costs. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention proposes a design method for a smart power consumption system at a construction site to solve the technical problems existing in the prior art.

[0008] The technical solution adopted by the present invention is:

[0009] A construction site smart power system design method is provided, including:

[0010] Calculate the peak power load of the project and meet the regular construction power load;

[0011] Calculate the difference between peak power load and regular power load;

[0012] Selecting a transformer based on the conventional construction power load;

[0013] Selecting an energy storage cabinet based on the difference, connecting the energy storage cabinet and the transformer in parallel to form a network, and independently setting a smart meter in the secondary distribution box;

[0014] An intelligent control system is integrated in the energy storage cabinet, and the power consumption of each smart meter is monitored by the intelligent control system. The intelligent control system automatically calculates the total load power and energy consumption cost data of the current power demand according to the preset power pricing rules and the power consumption of each smart meter. If the total load power of the current power demand is greater than or equal to the transformer capacity, the energy storage cabinet is controlled to automatically discharge and replenish; if the total load power of the current power demand is less than the transformer capacity, a charging or discharging suggestion for the energy storage cabinet is pushed to the mobile terminal device, and the operator remotely controls the charging or discharging of the energy storage cabinet by operating the mobile terminal device according to the on-site construction arrangement.

[0015] Furthermore, according to the project construction organization design, the peak power load of the project and the power load required for regular construction are calculated using the power load calculation formula.

[0016] Furthermore, the electric load calculation formula is expressed as:

[0017]

[0018] Among them, P 计 To calculate the power consumption; ∑P1 is the sum of the rated power consumption of all construction power equipment; ∑P2 is the rated capacity of the electric welder; ∑P3 is the sum of the rated power consumption of indoor lighting equipment; ∑P4 is the sum of the rated power consumption of outdoor lighting equipment; K1 is the simultaneous use coefficient of all construction power equipment; K2 is the simultaneous use coefficient of the electric welder; K3 is the simultaneous use coefficient of indoor lighting equipment; K4 is the simultaneous use coefficient of outdoor lighting equipment;

[0019] is the power factor of the electrical equipment;

[0020] K1: When the total number is less than 10 units, the value is 0.75; when the total number is 10 to 30 units, the value is 0.7; when the total number is more than 30 units, the value is 0.6.

[0021] Furthermore, the difference between the calculated peak power load and the normal power load is expressed as:

[0022] ΔP=P peak -P 常规

[0023] Where ΔP is the difference between the peak power load and the normal power load, P peak is the peak power load, P 常规 It is the power load for conventional construction.

[0024] Furthermore, the selected energy storage cabinet is used as a capacity supplement for the transformer to meet the peak power demand during the construction phase.

[0025] Furthermore, the intelligent control system includes: a basic parameter input module, a monitoring module, a data decision module, a charge and discharge control module and a manual interaction module;

[0026] The parameter input module is used to input the basic pricing parameters of the power grid pricing rules and the charging and discharging time of the energy storage cabinet;

[0027] The monitoring module is used to monitor the power consumption of each smart meter and the basic operating parameters of the energy storage cabinet itself;

[0028] The data decision module receives the basic pricing parameters entered into the system by the parameter entry module and the power consumption of each smart meter monitored by the monitoring module, and automatically calculates the total load power and energy consumption cost data of the current power demand based on the basic pricing parameters and the power consumption of each smart meter. If the total load power of the current power demand is greater than or equal to the transformer capacity, the energy storage cabinet is controlled to automatically discharge and replenish; if the total load power of the current power demand is less than the transformer capacity, a charging or discharging suggestion for the energy storage cabinet is pushed to the manual interaction module;

[0029] The charge and discharge control module is used to control the charge and discharge conversion of the energy storage cabinet;

[0030] The manual interaction module feeds back the suggestions of the data decision module and the data monitored by the monitoring module to the mobile terminal device in real time. The operator can view the feedback suggestions of the data decision module and the basic operating parameters of the energy storage cabinet in real time through the mobile terminal device, and operate the mobile terminal device according to the on-site construction arrangement to remotely control the charge and discharge control module to control the charge and discharge of the energy storage cabinet.

[0031] Furthermore, the intelligent control system also includes an electric energy output control module, which adjusts the output percentage of the energy storage cabinet and the box transformer when the energy storage cabinet is in a charging and discharging state.

[0032] Furthermore, the basic pricing parameters include: time-of-use electricity price, peak period, peak period and valley period.

[0033] Furthermore, the mobile terminal device includes: a mobile phone, a tablet computer and a laptop computer.

[0034] Furthermore, the manual interaction module feeds back the suggestions of the data decision module and the data monitored by the monitoring module to the mobile terminal device in real time based on the Internet of Things technology.

[0035] It can be seen from the above technical solution that the beneficial technical effects of the present invention are as follows:

[0036] 1. The present invention can more accurately determine the power demand of the construction site by accurately calculating the project peak power load and the conventional construction power load, which helps to avoid excessive investment in power infrastructure, thereby ensuring that power supply matches actual demand and improving the utilization efficiency of power resources.

[0037] 2. The present invention is based on the accurate calculation of power load. The solution can reasonably select the capacity of the transformer and realize the optimal allocation of power resources by introducing energy storage cabinets as a supplement. This configuration method can not only meet the power demand during peak periods, but also reduce the idleness of transformers during non-peak periods, thereby improving the utilization rate of the overall power facilities.

[0038] 3. The present invention can automatically calculate the electricity cost and make optimization suggestions based on the electricity pricing rules and real-time electricity consumption through the intelligent control system. By rationally scheduling the charging and discharging of the energy storage cabinet, and increasing electricity consumption or storing energy during the low electricity price period, this solution helps to reduce overall electricity bill expenditure and construction costs.

[0039] 4. The present invention introduces intelligent control systems and Internet of Things technologies to achieve real-time monitoring and intelligent management of power usage at construction sites. Operators can remotely monitor and control power facilities through mobile terminal devices, which improves the convenience and flexibility of power management. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0041] Figure 1 This is a circuit diagram of a smart power system for a construction site according to an embodiment of the present invention;

[0042] Figure 2 This is a flow chart of a method according to an embodiment of the present invention;

[0043] Figure 3 Schematic diagram of the intelligent control system module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0045] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0046] Example

[0047] This embodiment provides a method for designing a smart power system for a construction site, and a schematic diagram of a smart power system for a construction site is obtained by design, such as Figure 1 As shown, Figure 1 Where L1, L2, L3 represent live wires, N represents neutral wire, and PE represents ground wire; the flow chart of this method is as follows Figure 2 As shown, including:

[0048] S1: According to the project construction organization design, the peak power load of the project and the power load required for regular construction are calculated using the power load calculation formula;

[0049] The electric load calculation formula is expressed as:

[0050]

[0051] Where, P is the calculated power consumption (kW);

[0052] 1.05~1.1——Electricity unevenness coefficient;

[0053] ∑P1——The sum of rated power consumption of all construction power equipment;

[0054] ∑P2——Rated capacity of welding machine (kVA);

[0055] ∑P3——the sum of rated power consumption of indoor lighting equipment;

[0056] ∑P4——the sum of rated power consumption of outdoor lighting equipment;

[0057] K1——Coefficient of simultaneous use of all construction power and electrical equipment;

[0058] K2——simultaneous use coefficient of electric welding machine;

[0059] K3——simultaneous use coefficient of indoor lighting equipment;

[0060] K4——Simultaneous use coefficient of outdoor lighting equipment;

[0061] K1, K2, K3, K4—needed coefficients, which are 0.7, 0.6, 0.8, and 1 respectively;

[0062] ——The power factor of electrical equipment should be 0.75~0.78 at the highest during construction and 0.65~0.75 generally.

[0063] K1: When the total number is less than 10, the value is 0.75; when the total number is 10 to 30, the value is 0.7; when the total number is more than 30, the value is 0.6;

[0064] In this embodiment, a bridge project is taken as an example. The peak load required for construction power is concentrated in the pile foundation construction. The power load calculation formula is used to calculate P peak =440kvar. After the pile foundation construction is completed, the electric load calculation formula is used in the remaining normal construction stages to calculate P 常规 =290kvar;

[0065] S2: Calculate the difference between the peak power load and the regular power load, and select a transformer based on the regular construction power load; select an energy storage cabinet based on the difference, and use the energy storage cabinet as a capacity supplement for the transformer to meet the peak power demand during the construction phase;

[0066] In some embodiments, the difference between the peak power load and the normal power load is calculated using the expression:

[0067] ΔP=P peak -P 常规

[0068] Where ΔP is the difference between the peak power load and the normal power load, P peak is the peak power load, P 常规 The common box transformer models on the market are generally 200kvar, 315kvar, 400kvar, 500kvar, and 630kvar. In this embodiment, based on the above P 常规 =290kvar is used as the basis to select a 315kvar box transformer. In this embodiment, based on the above difference, a 250-type energy storage cabinet is selected to connect with the box transformer in parallel. After parallel connection, the capacity can reach 565kvar, which is greater than P peak The required 440kvar is sufficient for on-site use. The 250-type energy storage cabinet can be equipped with battery packs according to user needs. It can stably output 250kw and the short-term impact load can reach 600-700kw.

[0069] S3: The energy storage cabinet and the transformer are connected in parallel to form a network, and smart meters are separately set on the secondary distribution boxes of the transformer and the energy storage cabinet after the networking;

[0070] S4: A control system is integrated in the energy storage cabinet to monitor the power consumption of each smart meter. The energy storage cabinet control system automatically calculates the total load power and energy consumption cost data of the current power demand according to the preset power pricing rules and the power consumption of each smart meter. If the total load power of the current power demand is greater than or equal to the transformer capacity, the energy storage cabinet is controlled to automatically discharge and replenish; if the total load power of the current power demand is less than the transformer capacity, a charging or discharging suggestion for the energy storage cabinet is pushed to the mobile terminal device, and the operator remotely controls the charging or discharging of the energy storage cabinet by operating the mobile terminal device according to the on-site construction arrangement.

[0071] The intelligent control system, the module diagram is as follows Figure 3 As shown, it includes: basic parameter input module, monitoring module, data decision module, charge and discharge control module, manual interaction module and power output control module;

[0072] The parameter input module is used to input the basic parameters of the pricing rules of the power grid, including: time-of-use electricity prices, peak time periods, peak time periods and valley time periods, and the charging and discharging time of the energy storage cabinet.

[0073] The monitoring module is used to monitor the power consumption of each smart meter and the basic operating parameters of the energy storage cabinet itself;

[0074] The data decision module receives the basic pricing parameters entered into the system by the parameter entry module and the power consumption of each smart meter monitored by the monitoring module, and automatically calculates the total load power and energy consumption cost data of the current power demand based on the basic pricing parameters and the power consumption of each smart meter. If the total load power of the current power demand is greater than or equal to the transformer capacity, the energy storage cabinet is controlled to automatically discharge and replenish; if the total load power of the current power demand is less than the transformer capacity, a suggestion for charging or discharging the energy storage cabinet is pushed to the manual interaction module. In this embodiment, the calculation method of the power consumption cost is unit price*power consumption, the purpose is to intuitively reflect the energy consumption cost, so that the system or decision makers can judge whether to charge or discharge the energy storage cabinet according to the energy consumption cost, thereby reducing the electricity cost.

[0075] The charge and discharge control module is used to control the charge and discharge conversion of the energy storage cabinet;

[0076] The manual interaction module, based on the Internet of Things technology, feeds back the suggestions of the data decision module and the data monitored by the monitoring module to the mobile terminal device in real time. The operator can view the feedback suggestions of the data decision module and the basic operating parameters of the energy storage cabinet in real time through the mobile terminal device. The operator can decide the charging and discharging status of the energy storage cabinet (and adjust the output percentage of the energy storage cabinet and the box transformer) according to the on-site construction arrangement to improve the utilization efficiency of the energy storage cabinet. In one embodiment, the operator operates the mobile terminal device to remotely control the charging and discharging control module to control the charging and discharging of the energy storage cabinet;

[0077] The electric energy output control module adjusts the output percentage of the energy storage cabinet and the box transformer when the energy storage cabinet is in a charging and discharging state.

[0078] In some embodiments, the mobile terminal device includes a mobile phone, a tablet computer, and a laptop computer.

[0079] S5: After the peak period of electricity consumption, the energy storage cabinet can be dismantled and transferred to the next project for use. The energy storage cabinet can also be retained to store capacitors during the off-peak period for use during peak hours.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A method for designing a smart power system at a construction site, characterized in that: include: Calculate the peak power load of the project and meet the regular construction power load; Calculate the difference between peak power load and regular power load; Selecting a transformer based on the conventional construction power load; Selecting an energy storage cabinet based on the difference, connecting the energy storage cabinet and the transformer in parallel to form a network, and independently setting a smart meter in the secondary distribution box; An intelligent control system is integrated in the energy storage cabinet, and the power consumption of each smart meter is monitored by the intelligent control system. The intelligent control system automatically calculates the total load power and energy consumption cost data of the current power demand according to the preset power pricing rules and the power consumption of each smart meter. If the total load power of the current power demand is greater than or equal to the transformer capacity, the energy storage cabinet is controlled to automatically discharge and replenish; if the total load power of the current power demand is less than the transformer capacity, a charging or discharging suggestion for the energy storage cabinet is pushed to the mobile terminal device, and the operator remotely controls the charging or discharging of the energy storage cabinet by operating the mobile terminal device according to the on-site construction arrangement.

2. A construction site smart power system design method according to claim 1, characterized in that: According to the project construction organization design, the peak power load of the project and the power load required for regular construction are calculated using the power load calculation formula.

3. A construction site smart power system design method according to claim 2, characterized in that: The electric load calculation formula is expressed as: Among them, P 计 To calculate the power consumption; ∑P1 is the sum of the rated power consumption of all construction power equipment; ∑P2 is the rated capacity of the electric welder; ∑P3 is the sum of the rated power consumption of indoor lighting equipment; ∑P4 is the sum of the rated power consumption of outdoor lighting equipment; K1 is the simultaneous use coefficient of all construction power equipment; K2 is the simultaneous use coefficient of the electric welder; K3 is the simultaneous use coefficient of indoor lighting equipment; K4 is the simultaneous use coefficient of outdoor lighting equipment; The power factor of the electrical equipment; K1: When the total number is less than 10 units, the value is 0.75; when the total number is 10 to 30 units, the value is 0.7; when the total number is more than 30 units, the value is 0.

6.

4. A construction site smart power system design method according to claim 3, characterized in that: The difference between the peak power load and the normal power load is calculated as follows: ΔP=P peak -P 常规 Where ΔP is the difference between the peak power load and the normal power load, P peak is the peak power load, P 常规 It is the normal construction power load.

5. A construction site smart power system design method according to claim 1, characterized in that: The selected energy storage cabinet is used as a capacity supplement for the transformer to meet the peak power demand during the construction phase.

6. A construction site smart power system design method according to claim 1, characterized in that: The intelligent control system includes: a basic parameter input module, a monitoring module, a data decision module, a charge and discharge control module and a manual interaction module; The parameter input module is used to input the basic pricing parameters of the power grid pricing rules and the charging and discharging time of the energy storage cabinet; The monitoring module is used to monitor the power consumption of each smart meter and the basic operating parameters of the energy storage cabinet itself; The data decision module receives the basic pricing parameters entered into the system by the parameter entry module and the power consumption of each smart meter monitored by the monitoring module, and automatically calculates the total load power and energy consumption cost data of the current power demand based on the basic pricing parameters and the power consumption of each smart meter. If the total load power of the current power demand is greater than or equal to the transformer capacity, the energy storage cabinet is controlled to automatically discharge and replenish; if the total load power of the current power demand is less than the transformer capacity, a charging or discharging suggestion for the energy storage cabinet is pushed to the manual interaction module; The charge and discharge control module is used to control the charge and discharge conversion of the energy storage cabinet; The manual interaction module feeds back the suggestions of the data decision module and the data monitored by the monitoring module to the mobile terminal device in real time. The operator can view the feedback suggestions of the data decision module and the basic operating parameters of the energy storage cabinet in real time through the mobile terminal device, and operate the mobile terminal device according to the on-site construction arrangement to remotely control the charge and discharge control module to control the charge and discharge of the energy storage cabinet.

7. A construction site smart power system design method according to claim 5, characterized in that: The intelligent control system further comprises an electric energy output control module, which adjusts the output percentage of the energy storage cabinet and the box transformer when the energy storage cabinet is in a charging and discharging state.

8. A construction site smart power system design method according to claim 5, characterized in that: The basic pricing parameters include: time-of-use electricity price, peak period, peak period and valley period.

9. A construction site smart power system design method according to claim 5, characterized in that: The mobile terminal devices include: mobile phones, tablet computers and laptop computers.

10. A construction site smart power system design method according to claim 5, characterized in that: The artificial interaction module is based on the Internet of Things technology and feeds back the suggestions of the data decision module and the data monitored by the monitoring module to the mobile terminal device in real time.

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