Flexible load regulation and control method based on novel power supply and distribution system

Abstract

The invention discloses a flexible load regulation and control method based on a novel power supply and distribution system. The method comprises the steps that a power supply management platform sends a regulation and control instruction; after the building power supply and distribution system receives a regulation and control instruction, the following regulation and control strategies are executed on three power utilization loads in a building: regulation and control on the air conditioner load based on the indoor thermal comfort degree are carried out, and the regulation comprises regulation on the cooling capacity, the water flow and / or the chilled water temperature of an air conditioner system; the lighting load is regulated and controlled, wherein the regulation and control comprise flexible regulation and control of the Internet of Things and flexible regulation and control of loop control; and regulating and controlling the load of the charging pile, including regulating the power of the charging pile and the use number of the charging pile. Compared with the prior art, by setting a flexible load regulation and control strategy, dynamic adjustment of air conditioner, illumination and charging pile loads in the power supply and distribution system is accurately realized, the flexibility and response speed of the power supply and distribution system are improved, and the power supply and distribution system is ensured to meet the peak demand of a power grid. And the indoor thermal comfort, the light environment comfort and the actual charging demand of a user are ensured to the greatest extent.

Description

Technical Field

[0001] The present invention relates to the field of load regulation of a power supply and distribution system, and particularly to a flexible load regulation method based on a new power supply and distribution system. Background Art

[0002] With the acceleration of the urbanization process and the rapid growth of energy demand, the problem of power grid supply-demand balance has become increasingly prominent. Especially during peak power consumption periods, the power supply system faces huge pressure. Excessive grid load is likely to cause power supply shortages and even power cuts. Traditional power supply and distribution system regulation methods mainly rely on mandatory load cutting means, directly stopping the power supply of some equipment. Although this can reduce the grid load in a short time, such methods often have a serious impact on the normal operation of buildings, cannot meet the basic needs of users for indoor thermal comfort and light environment comfort, and the user experience is poor.

[0003] In recent years, as an emerging demand response means, virtual power plant technology can effectively improve the supply-demand coordination ability of the power system by integrating distributed energy, energy storage devices, and flexible load resources. However, the main loads inside buildings, such as air-conditioning loads, lighting loads, and charging pile loads, etc., have great adjustable potential. How to achieve the dynamic regulation of these loads without affecting the comfort of the people inside the building has become the focus of current research.

[0004] In terms of air-conditioning loads, existing technologies usually reduce the cooling capacity by simply turning off the chiller or water pump. Although this method can reduce energy consumption, it lacks flexibility during implementation and cannot be dynamically adjusted according to the actual load demand, easily resulting in a serious decline in indoor thermal comfort and affecting the normal work and life of users.

[0005] In terms of lighting loads, traditional lighting regulation means mainly rely on manual switches, time control, or sensor control, and it is difficult to achieve remote precise regulation. In addition, existing mandatory load cutting strategies will cause the lighting system to suddenly go out, unable to meet the normal operation requirements of buildings such as offices and commercial buildings, and affecting the light environment comfort inside the building.

[0006] In terms of charging pile loads, electric vehicle charging, as a newly added high-energy-consuming load, has strong controllability. However, existing technologies lack refined management means for charging pile loads and cannot reasonably allocate charging time and charging power, resulting in excessive grid load during peak charging periods.

[0007] Therefore, the existing technologies have problems such as insufficient flexibility, rough regulation strategies, and poor user experience in load regulation. There is an urgent need for a new method based on flexible load regulation that can achieve dynamic adjustment and fine management of air conditioning, lighting, and charging pile loads, ensuring that while reducing the grid load, the building power supply and distribution system can maximize the normal operation of the building and the comfortable experience of users. Summary of the Invention

[0008] The object of the present invention is to provide a flexible load regulation method based on a new type of power supply and distribution system, and the technical problem to be solved is to ensure that while meeting the peak demand of the power grid, the indoor thermal comfort, light environment comfort, and the actual charging needs of users are maximally guaranteed.

[0009] To solve the above problems, the present invention is implemented by adopting the following technical solutions: A flexible load regulation method based on a new type of power supply and distribution system includes the following steps:

[0010] Step S1: The power supply management platform sends and issues a regulation instruction;

[0011] Step S2: After receiving the regulation instruction, the building power supply and distribution system executes the following regulation strategies for the three major electricity-consuming loads in the building:

[0012] Regulate the air conditioning load based on the indoor thermal comfort, including: adjusting the cooling capacity, water flow rate, and / or chilled water temperature of the air conditioning system;

[0013] Regulate the lighting load, including flexible regulation of the Internet of Things and flexible regulation of loop control;

[0014] Regulate the charging pile load, including: adjusting the charging pile power and the number of charging piles in use.

[0015] Furthermore, it further includes the following steps:

[0016] Step S3: Regulation verification, real-time monitor the power changes of the air conditioning load, lighting load, and charging pile load through the electricity meter data acquisition system, and dynamically compare the actual load with the baseline load, calculate the actual adjustment amount and adjustment flexibility, and verify the execution effect of the regulation strategy.

[0017] Furthermore, when the execution effect does not meet the requirements of the regulation instruction, execute Step S4;

[0018] Step S4 includes: sorting the three major loads according to the priority of load reduction from large to small, and performing load reduction in sequence according to the sorting.

[0019] Furthermore, after sorting, judge the environmental constraints of the three major categories to determine the final load reduction order, where

[0020] Air conditioning load: Combined with the outdoor air temperature T out and the determination and regulation possibility of indoor thermal comfort level. If T out > 30°C and the indoor temperature is close to the upper limit, even if the priority index ranking of the air conditioning load is the highest, the air conditioning load will not be regulated. After ignoring the priority index ranking of the air conditioning load, continue to regulate the remaining loads according to the priority index ranking;

[0021] Lighting load: Real-time detection of indoor illuminance and ambient light brightness. If the illuminance has reached the lowest set standard of 300 lx, even if the priority index ranking of the lighting load is the highest, the lighting load will not be regulated. After ignoring the priority index ranking of the lighting load, continue to regulate the remaining loads according to the priority index ranking;

[0022] Charging pile load: When the utilization rate U of the charging pile ≥ 70% and the charging urgency C of the charging vehicle ≤ 50%, at this time, the regulation priority of the charging pile load is low. Even if the priority index ranking of the charging pile load is the highest, the charging pile load will not be regulated. After ignoring the priority index ranking of the charging pile load, continue to regulate the remaining loads according to the priority index ranking.

[0023] Furthermore, the regulation based on indoor thermal comfort is to classify indoor thermal comfort. Indoor thermal comfort is divided into two levels: Level I and Level II. Among them: Level I thermal comfort: 26°C ≥ indoor temperature > 24°C, 60% > relative humidity > 40%; Level II thermal comfort: 28°C ≥ indoor temperature > 26°C, 70% > relative humidity. When the indoor thermal comfort drops by one level, adjust the running time of the chiller, and at the same time reduce the flow rates of the chilled water pump and the cooling water pump in the air conditioning system.

[0024] Furthermore, during the regulation of the air conditioning load, the cooling capacity, water flow rate of the air conditioning system and / or the chilled water temperature are also dynamically selected for adjustment according to the real-time operation data of the air conditioning system.

[0025] Furthermore, the regulation of the lighting load is based on the adjustment of indoor light environment comfort, including Internet of Things flexible regulation and loop control flexible regulation.

[0026] Furthermore, the Internet of Things flexible regulation is implemented according to the national standard GB / T 50024-2024 "Building Lighting Design Standard"; the loop control flexible regulation is to conduct zoning management on the building's internal lighting system and reduce the illuminance by closing some lighting loops.

[0027] Furthermore, regulating the charging pile load includes real-time collection of the operation data of each charging pile. The operation data includes the current charging power, charging duration, battery power, and the maximum capacity of the vehicle battery. The total number of charging piles and the number of charging piles in use are counted. After calculating the current utilization rate of the charging piles, the charging pile power and the number of charging piles in use are adjusted.

[0028] Furthermore, specifically regulating the charging pile load includes:

[0029] Judge the urgency C of the charging vehicle. According to the current battery power and the maximum battery capacity of the charging vehicle, calculate the charging urgency of the vehicle, and set three-level urgency judgment conditions: high urgency is when the current battery power C ≤ 50%; medium urgency is when 50% < current battery power C ≤ 80%; low urgency is when the current battery power > 80%.

[0030]

[0031] Among them, E current is the current power, and E max is the maximum power of the vehicle battery;

[0032] When it is high urgency, the power of the charging pile corresponding to the charging vehicle is not adjusted; when it is medium urgency, the power of the charging pile corresponding to the charging vehicle is adjusted to reduce the charging pile power; when it is low urgency, the power of the charging pile corresponding to the charging vehicle is adjusted to reduce the charging pile power or turn it off.

[0033] Judge the utilization rate U of the charging pile. According to the ratio of the number of charging piles in use to the total number of charging piles, calculate the utilization rate of the charging pile, and set three-level utilization rate judgment conditions, which are high load state, utilization rate U ≥ 70%; medium load state, 40% ≤ utilization rate U < 70%; low load state, utilization rate U > 40%.

[0034]

[0035] Among them, N active is the current number of charging piles in use, and N total is the total number of charging piles;

[0036] Regulate the charging piles according to the urgency and utilization rate;

[0037] When in a high-load state, the charging power of the charging piles for low-urgency charging vehicles is preferentially reduced, while the charging power of the charging piles for medium-urgency charging vehicles and high-urgency charging vehicles remains unchanged; when in a medium-load state, the charging power of the charging piles for medium-urgency and low-urgency charging vehicles is reduced, and the charging power of the charging piles for high-urgency charging vehicles remains unchanged; when in a low-load state, no adjustment is made.

[0038] Compared with the prior art, by setting a flexible load regulation strategy, the present invention accurately realizes the dynamic regulation of the loads of air conditioners, lighting, and charging piles in the power supply and distribution system, improves the flexibility and response speed of the power supply and distribution system, and ensures that while meeting the peak demand of the power grid, the indoor thermal comfort, light environment comfort, and the actual charging needs of users are maximally guaranteed. Brief Description of the Drawings

[0039] Figure 1 It is a flow chart of the present invention.

[0040] Figure 2 It is a flow chart for adjusting the indoor thermal comfort of the present invention.

[0041] Figure 3 It is a flow chart for regulating the light environment of the present invention.

[0042] Figure 4 It is a flow chart for regulating the charging piles of the present invention. Detailed Embodiments

[0043] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0044] In the present invention, the electrical loads in a building are divided into three categories: air-conditioning load, lighting load, and charging pile load, and through flexible regulation of these three categories, effective reduction of the building load is achieved, and the flexible regulation ability of the power supply and distribution system is improved.

[0045] As Figure 1 shown, the present invention discloses a flexible load regulation method based on a new power supply and distribution system, including the following steps:

[0046] Step S1, the power supply management platform (such as the State Grid) sends a regulation instruction downward;

[0047] Step S2, after receiving the regulation instruction, the building power supply and distribution system (system) executes the following regulation strategy on the three major electrical loads in the building;

[0048] The system regulates the air-conditioning load. The regulation of the air-conditioning load by the system is based on the adjustment of the indoor thermal comfort, including: adjusting the cooling capacity, water flow rate, and / or chilled water temperature of the air-conditioning system.

[0049] As Figure 2As shown, adjusting the cooling capacity and water flow rate of the air conditioning system specifically involves the system's real-time monitoring of the load demand inside the building, and adjusting the operating states of the chiller, water pump, cooling tower fan, variable-frequency drive motor, terminal equipment, and control valve to reduce the cooling capacity and / or water flow rate of the air conditioning system, thereby reducing the power consumption load of the air conditioning system.

[0050] For the adjustment based on indoor thermal comfort, the indoor thermal comfort can be graded. According to the national standards "Code for Design of Heating, Ventilation and Air Conditioning of Civil Buildings" GB 50736 and "Technical Code for Ground Source Heat Pump System Engineering" GB50366, the indoor thermal comfort is divided into two grades, namely Grade I and Grade II, where: Grade I thermal comfort: the indoor temperature is between 26°C ≥ indoor temperature > 24°C, and the relative humidity is between 60% > relative humidity > 40%; Grade II thermal comfort: the indoor temperature is between 28°C ≥ indoor temperature > 26°C, and the relative humidity < 70%. Partial reduction can be achieved by increasing the air conditioning water supply temperature and / or reducing the operation of the chiller, and the relative humidity can rise to no more than 60% - 70%.

[0051] When the indoor thermal comfort drops by one grade, adjust the operation time of the chiller, and at the same time reduce the flow rates of the chilled water pump and cooling water pump in the air conditioning system to achieve flexible control. This strategy can reduce the air conditioning power consumption load by about 50% during peak power consumption periods, for example, adjusting from Grade I to Grade II.

[0052] Adjusting the operation time of the chiller includes short-term shutdown (stopping) and partial load operation.

[0053] Short-term shutdown means that if the total building cooling demand decreases and the cooling capacity of the remaining chillers meets the Grade II indoor thermal comfort standard, flexible control is implemented on some chillers, and at least one chiller is stopped to avoid energy consumption waste caused by redundant operation. This chiller remains in the shutdown state during the response period;

[0054] Optionally, if it is not possible to stop at least one chiller, determine whether the total cooling capacity ≥ the current cooling load. If so, adjust the operating frequency of the corresponding chiller to 20% - 30% of the rated frequency, that is, switch to the low-load intermittent operation state. The system detects the room temperature and cooling load every 30 minutes. If the Grade II indoor thermal comfort requirements are still met for two consecutive times (i.e., 1 hour), continue to maintain this state.

[0055] Partial load operation (frequency reduction or load reduction): If completely shutting down will cause the indoor temperature and humidity to fail to meet the current indoor thermal comfort level, then reduce the operating duration or load rate of the chiller. The load rate = actual operating load / rated load × 100%. For example, adjust the chiller frequency, increase the supply water temperature, or shorten the operation interval to make the chiller operate intermittently at a lower load. For example, change the original 24-hour full-load operation of the chiller to shutting down for 2 - 3 hours during peak periods or working at a lower frequency, thus effectively reducing the energy consumption load.

[0056] To adjust the chilled water temperature, when the cooling capacity and water flow rate of the air-conditioning system remain unchanged, appropriately increase the chilled water supply temperature. For example, the chilled water supply temperature can be raised from the set value of 6°C to no higher than 10°C. By increasing the evaporation temperature of the chiller, the energy consumption of the chiller can be reduced, and the effective reduction of the air-conditioning power load can be achieved.

[0057] When the chilled water supply temperature is increased by 1°C, the energy consumption of the chiller can be reduced by about 3% - 5%.

[0058] During the air-conditioning load regulation process, the system also dynamically selects to adjust the cooling capacity and water flow rate of the air-conditioning system or the chilled water temperature, or a combination of both, to obtain the best regulation effect.

[0059] The dynamic selection and adjustment include at least implementing one or both of the following dynamic adjustment strategies:

[0060] Dynamic adjustment strategy one: When the outdoor temperature is lower than 28°C, the system preferentially reduces the operation of one chiller and reduces the water flow rate on the original chiller.

[0061] Dynamic adjustment strategy two: When the outdoor temperature is higher than 28°C or it is no longer possible to reduce the operation of the chiller, reduce the energy consumption of the chiller by increasing the chilled water supply temperature (such as from 6°C to 10°C).

[0062] Dynamic adjustment strategy three: If the indoor temperature still meets the upper limit in Class II of the indoor thermal comfort classification (<28°C), then jointly reduce the number of operating chillers and moderately increase the chilled water temperature to achieve the comprehensive regulation effect by minimizing the air-conditioning power load to the greatest extent. During the implementation process, the air-conditioning automatic control system periodically compares the deviation between the current room temperature and humidity and the target comfort level, and judges whether to switch to another strategy according to the above rules.

[0063] Specifically, dynamic adjustment strategy three is as follows:

[0064] If the internal temperature of the building is still near the upper limit of Class II of the indoor thermal comfort, that is, it meets the following conditions:

[0065] Current indoor temperature: 27.5°C ≤ Tin < 28°C;

[0066] Current relative humidity: Hin ≤ 70%;

[0067] The current number of chillers cannot be further reduced (for example, only 1 chiller is left running);

[0068] If the current chilled water temperature has not reached the upper limit for increase (for example, not exceeding 10°C), the following combined control logic is executed:

[0069] 1. Maintain the minimum number of running chillers (such as 1 unit), and at the same time increase the chilled water supply temperature by 1°C within 10 minutes, not exceeding the upper limit of 10°C;

[0070] 2. The system periodically compares the deviation ΔT between the indoor temperature and the upper comfort limit, and the deviation value ΔH between the humidity and the upper comfort limit (28°C, 70%) every 5 minutes;

[0071] When ΔT < 0.5°C and ΔH < 5%, and the actual load reduction ΔP has not reached the preset target value (such as a 10% reduction), continue to maintain Dynamic Regulation Strategy Three;

[0072] If ΔT ≥ 0.5°C or ΔH ≥ 5%, suspend Dynamic Regulation Strategy Three, and the system maintains the current operating state or slowly resumes operation.

[0073] The specific process of slowly resuming operation is as follows:

[0074] Intermittently start one standby chiller, and set the operating frequency to 30 - 40% load within the first 15 minutes after the standby chiller starts;

[0075] Chilled water temperature: Decrease by 1°C every 5 - 10 minutes until it returns to the baseline supply temperature (such as 6°C) or the lower limit of the control range;

[0076] Pump flow rate: Gradually increase, with a maximum not exceeding 90% of the rated design flow rate, and control the increase rate not to exceed 10% every 5 minutes.

[0077] As Figure 3 shown, the system regulates the lighting load. The lighting load regulation is based on the adjustment of the indoor light environment comfort, including IoT flexible regulation and loop control flexible regulation. The system sends regulation instructions to the IoT platform, and the IoT platform executes IoT flexible regulation and loop control flexible regulation.

[0078] The flexible regulation of the Internet of Things specifically means that after the system issues a regulation command, it communicates with the lighting system through the Internet of Things platform, sends the dimming command to the LED lamps through the 2.4G wireless module, dynamically adjusts the lighting current output, reduces the luminous flux, and thus achieves precise regulation of the illuminance. Dynamically adjusting the lighting current output specifically means that the system cyclically detects the deviation between the brightness of each scene and the set illuminance. When the illuminance is still greater than the threshold value (300 Lx), a dimming command is sent again for correction.

[0079] In the present invention, according to the national standard GB / T 50024-2024 "Building Lighting Design Standard", the illuminance of the dimmable LED lamps can be reduced by one level of the standard value. For example, it can be reduced from 500 lx to 300 lx, and the power synchronously drops to 50%-67% of the original, and it meets the requirements of the indoor light environment comfort.

[0080] The flexible regulation of loop control specifically means that after the system issues a regulation command, through the intelligent lighting loop control module (intelligent lighting loop controller), the internal lighting system of the building is managed in zones, and by turning off some lighting loops, the illuminance is reduced.

[0081] The flexible regulation of loop control is used for large space areas. By reasonably planning the lighting loop grouping, the regional lighting load can be effectively reduced, and the power reduction ratio is equivalent to that of the Internet of Things regulation.

[0082] During the lighting load regulation process, the Internet of Things regulation method and the loop control method can be used alone or in combination to achieve a refined regulation effect.

[0083] In the prior art, when grouping loops, the loops are divided into a core area (referring to an area with high requirements for the quality of personnel's visual activities and strict requirements for the continuity and stability of illuminance, such as: office areas, meeting rooms, medical diagnosis and treatment rooms, teaching classrooms, etc.) and a non-core area (referring to an area with relatively low requirements for illuminance, discontinuous usage frequency, or an area where lighting can be interrupted for a short time, such as: elevator lobbies, corridor public walkways, underground garages).

[0084] When the power grid load reduction demand is large (the target reduction load accounts for 25% or more of the total building load baseline value) and there is an emergency load reduction, first, through the intelligent lighting loop control module, the non-core areas are turned off to achieve rapid load reduction;

[0085] Emergency load reduction means that the power grid or the virtual power plant platform issues a regulation response command within 10 minutes, and the price signal or the peak shaving level reaches the highest level (such as A level, red warning, etc.).

[0086] The judgment of emergency load reduction is as follows, and meeting any one of them is sufficient:

[0087] 1. The peak shaving command issuance time < 10 min;

[0088] 2. The price response signal ≥ 1.5 yuan / kWh;

[0089] 3. The virtual power plant platform accessed marks this event as "Priority Class I" regulation;

[0090] 4. The local power grid platform marks it as a "Red Load Warning" event.

[0091] For the lighting circuit that is still in the core area and is in the working state, a dimming command is sent to the intelligent lighting circuit control module through the Internet of Things platform, reducing the brightness of the lighting circuit from 100% to 60%, and precisely adjusting the illuminance from 500 lx to 300 lx, so as to achieve sub - divided adjustable load reduction.

[0092] To achieve flexible and refined regulation of different lighting areas, on the basis of the above - mentioned lighting load regulation strategy, the regulation target is further refined by combining functional zoning and circuit logic, improving the response flexibility and regulation efficiency.

[0093] Specifically, the internal lighting system of the building can be divided into multiple areas, preferably including the core lighting area and the non - core area.

[0094] In the non - core area, the intelligent lighting circuit control module is used to execute on - off control, directly turning off some of the lighting circuits to quickly achieve a large - scale load reduction;

[0095] In the core lighting area, the Internet of Things lighting dimming method is used for continuously adjustable control, reducing the illuminance to 300 lx to ensure that while achieving energy consumption reduction, it meets the basic lighting comfort requirements of office workers.

[0096] For example, the public area is divided into several circuits, and some unimportant public lighting circuits are directly turned off through the intelligent circuit control module;

[0097] In areas such as high - level offices or meeting rooms where the illuminance requirements are more sensitive, the brightness is partially reduced instead of being completely turned off to achieve a balance between comfort and energy conservation.

[0098] The system regulates the charging pile load, including: the system collects the operation data of each charging pile in real - time through the charging pile monitoring and management system. The operation data includes the current charging power, charging duration, battery power, and the maximum capacity of the vehicle battery. At the same time, the total number of charging piles and the number of charging piles in use are counted, and the current utilization rate of the charging piles is calculated. These data provide a basis for the formulation of subsequent regulation strategies.

[0099] As Figure 4 shown, the regulation of the charging pile load specifically includes:

[0100] First, judge the urgency C of the charging vehicle. Calculate the charging urgency of the vehicle based on the current battery power and the maximum battery capacity of the vehicle. Set three-level urgency judgment conditions: high urgency, current battery power C ≤ 50%; medium urgency, 50% < current battery power C ≤ 80%; low urgency, current battery power > 80%.

[0101]

[0102] Among them, E current is the current power, and E max is the maximum battery power of the vehicle.

[0103] When it is high urgency, the charging pile power corresponding to the charging vehicle is not adjusted; when it is medium urgency, the charging pile power corresponding to the charging vehicle is adjusted to reduce the charging pile power; when it is low urgency, the charging pile power corresponding to the charging vehicle is adjusted to reduce the charging pile power or turn it off.

[0104] Secondly, judge the utilization rate U of the charging pile. Calculate the utilization rate of the charging pile according to the ratio of the number of charging piles in use to the total number of charging piles. Set three-level utilization rate judgment conditions, namely high load state, utilization rate U ≥ 70%; medium load state, 40% ≤ utilization rate U < 70%; low load state, utilization rate U > 40%.

[0105]

[0106] Among them, N active is the number of charging piles in use currently, and N total is the total number of charging piles.

[0107] Finally, regulate the charging pile according to the urgency and utilization rate;

[0108] When it is in the high load state, preferentially reduce the charging power of the charging piles of low-urgency charging vehicles, and keep the charging power of the charging piles of medium-urgency charging vehicles and high-urgency charging vehicles unchanged; when it is in the medium load state, reduce the charging power of the charging piles of medium-urgency and low-urgency charging vehicles, and keep the charging power of the charging piles of high-urgency charging vehicles unchanged; when it is in the low load state, no adjustment is made.

[0109] Step S3, regulation verification. The system monitors the power changes of the air-conditioning load, lighting load and charging pile load in real time through the electricity meter data acquisition system, and dynamically compares the actual load with the baseline load, calculates the actual adjustment amount and adjustment flexibility, and verifies the execution effect of the regulation strategy. When the execution effect does not meet the requirements of the regulation instruction, execute step S4. If it meets, it is considered that the regulation is successful and the process ends.

[0110] Calculating the actual adjustment amount and adjustment flexibility specifically involves:

[0111] Calculating the difference between the target reduction amount and the actual reduction amount.

[0112] P target -P actual

[0113] Wherein: the target reduction amount is P target , and the actual reduction amount is P actual

[0114] If |P target -P actual | / P target > δ (δ is a threshold value, which is 5%), it indicates that the regulation effect is not ideal, and step S4 is further executed.

[0115] Step S4: Joint load regulation.

[0116] The system sorts the loads into three categories, specifically:

[0117] Load proportion: Determine the priority regulation target according to the proportion of each load in the total load during the current period.

[0118]

[0119] Wherein, R i is the load proportion of load i, P i is the real-time load power of load i, and j refers to air-conditioning load, lighting load or charging pile load.

[0120] Measuring the priority of load reduction:

[0121] Priority index

[0122] Wherein, C i corresponds to the unit reduction cost of the three types of loads. Sort in descending order according to P adj , and preferentially reduce the load with the highest ranking.

[0123] The loads are air-conditioning load, lighting load, and charging pile load.

[0124] After sorting, the environmental constraints of the three categories are also judged to determine the final load reduction order, wherein:

[0125] Air-conditioning load: Combine the outdoor air temperature T out and the indoor thermal comfort level to judge the possibility of regulation. Specifically, if T out>30°C, and the indoor temperature is close to the upper limit (such as 26°C). Even if the priority index of the air-conditioning load is ranked first, the air-conditioning load is not regulated. After the system ignores the priority index ranking of the air-conditioning load, it continues to regulate the remaining loads according to the priority index ranking. Otherwise, the regulation strategy in step S2 is used to regulate the air-conditioning load.

[0126] Lighting load: The indoor illuminance and ambient light brightness are detected in real time. If the illuminance has reached the lowest set standard of 300 lx, even if the priority index of the lighting load is ranked first, the lighting load is not regulated. After the system ignores the priority index ranking of the lighting load, it continues to regulate the remaining loads according to the priority index ranking. Otherwise, the regulation strategy in step S2 is used to regulate the lighting load.

[0127] Charging pile load: When the utilization rate U of the charging pile ≥ 70% and the charging urgency C of the charging vehicle ≤ 50%, the regulation priority of the charging pile load is low at this time. Even if the priority index of the charging pile load is ranked first, the charging pile load is not regulated. After the system ignores the priority index ranking of the charging pile load, it continues to regulate the remaining loads according to the priority index ranking.

[0128] When the utilization rate is medium (40% ≤ U < 70%) and the urgency of some vehicles is relatively high (50% < C ≤ 80%), the regulation strategy in step S2 is used to regulate the charging pile load to reduce the non-urgent charging power.

[0129] Through the flexible load regulation strategy, the present invention accurately realizes the dynamic regulation of the air-conditioning, lighting and charging pile loads in the power supply and distribution system, improves the flexibility and response speed of the power supply and distribution system, and has the following beneficial effects:

[0130] (1) High flexibility. Through the adjustment of indoor thermal comfort and light environment comfort, the flexible regulation of different types of loads is realized;

[0131] (2) Fine management. Through the flexible regulation of the Internet of Things and intelligent loop control, the accuracy of the regulation of the air-conditioning, lighting and charging pile loads is ensured;

[0132] (3) Fast response speed. Combined with the dynamic feedback mechanism, the system response time can reach the second level, quickly reducing the power load during peak hours;

[0133] (4) Comfort guarantee. While reducing the load, maintaining the indoor thermal comfort and light environment comfort acceptable to users;

[0134] (5) Significant actual effect. Through implementation verification, the highest reduction of the air-conditioning power load is 50%, the flexibility of the lighting flexible regulation is 60% - 75%, and the flexibility of the charging pile flexible regulation is 69.1%.

Claims

1. A flexible load regulation method based on a new power supply and distribution system, characterized in that: It includes the following steps: Step S1: The power supply management platform sends a control instruction downwards; Step S2: After receiving the control instruction, the building power supply and distribution system executes the following control strategies for the three major electricity loads in the building: For the air-conditioning load, the regulation is based on the indoor thermal comfort, including: adjusting the cooling capacity, water flow rate, and / or chilled water temperature of the air-conditioning system; For the lighting load, the regulation includes IoT flexible regulation and loop control flexible regulation; For the charging pile load, the regulation includes: adjusting the power of the charging pile and the number of charging piles in use.

2. The flexible load regulation method based on the new power supply and distribution system according to claim 1, characterized in that: It also includes the following steps: Step S3: Regulation verification. The power changes of the air-conditioning load, lighting load, and charging pile load are monitored in real time through the electricity meter data acquisition system, and the actual load is dynamically compared with the baseline load to calculate the actual adjustment amount and adjustment flexibility, and verify the execution effect of the control strategy.

3. The flexible load regulation method based on the new power supply and distribution system according to claim 2, characterized in that: When the execution effect does not meet the requirements of the control instruction, execute Step S4; Step S4 includes: sorting the three major loads according to the priority of load reduction from high to low, and performing load reduction in sequence according to the sorting.

4. The flexible load regulation method based on the novel power supply and distribution system according to claim 3, wherein: After sorting, the environmental constraints of the three categories are also judged to determine the final load reduction order. Among them, Air conditioning load: Combined with the outdoor air temperature T out and the determination of indoor thermal comfort level and the possibility of regulation, if T out > 30°C and the indoor temperature is close to the upper limit, even if the air conditioning load has the highest priority index ranking, the air conditioning load will not be regulated. After ignoring the priority index ranking of the air conditioning load, the remaining loads will continue to be regulated according to the priority index ranking; For the lighting load: The indoor illuminance and ambient light brightness are detected in real time. If the illuminance has reached the lowest set standard of 300 lx, even if the lighting load has the highest priority index ranking, the lighting load will not be regulated. After ignoring the priority index ranking of the lighting load, continue to regulate the remaining loads according to the priority index ranking; For the charging pile load: When the utilization rate U of the charging pile ≥ 70% and the charging urgency C of the charging vehicle ≤ 50%, the regulation priority of the charging pile load is low. Even if the charging pile load has the highest priority index ranking, the charging pile load will not be regulated. After ignoring the priority index ranking of the charging pile load, continue to regulate the remaining loads according to the priority index ranking.

5. The flexible load regulation method based on the novel power supply and distribution system according to claim 1, characterized in that: The regulation based on indoor thermal comfort is carried out by grading the indoor thermal comfort. The indoor thermal comfort is divided into two grades: Grade I and Grade II. Among them: Grade I thermal comfort: 26°C ≥ indoor temperature > 24°C, 60% > relative humidity > 40%; Grade II thermal comfort: 28°C ≥ indoor temperature > 26°C, 70% > relative humidity. When the indoor thermal comfort drops by one grade, the running time of the chiller is adjusted, and at the same time, the flow rates of the chilled water pump and cooling water pump in the air-conditioning system are reduced.

6. The flexible load regulation method based on the novel power supply and distribution system according to claim 5, characterized in that: During the regulation of the air-conditioning load, the cooling capacity, water flow rate, and / or chilled water temperature of the air-conditioning system are dynamically selected for adjustment according to the real-time operation data of the air-conditioning system.

7. The flexible load regulation method based on the new power supply and distribution system according to claim 1, wherein: The regulation of the lighting load is based on the regulation of the indoor light environment comfort, including IoT flexible regulation and loop control flexible regulation.

8. The flexible load regulation method based on the new power supply and distribution system according to claim 7, wherein: The IoT flexible regulation is carried out according to the national standard GB / T 50024-2024 "Building Lighting Design Standard"; the loop control flexible regulation is to conduct zoning management on the building internal lighting system, and reduce the illuminance by closing some lighting loops.

9. The flexible load regulation method based on the novel power supply and distribution system according to claim 1, wherein: Regulating the load of charging piles includes collecting the operation data of each charging pile in real time. The operation data includes the current charging power, charging duration, battery power, and the maximum capacity of the vehicle battery. The total number of charging piles and the number of charging piles in use are counted. After calculating the utilization rate of the current charging piles, the charging pile power and the number of charging piles in use are adjusted.

10. The flexible load regulation method based on the new power supply and distribution system according to claim 9, characterized in that: Specifically, regulating the load of charging piles includes: Judging the urgency C of the charging vehicle. According to the current battery power and the maximum battery capacity of the charging vehicle, the charging urgency of the vehicle is calculated. Three levels of urgency judgment conditions are set: high urgency is when the current battery power C ≤ 50%; medium urgency is when 50% < current battery power C ≤ 80%; low urgency is when the current battery power > 80%. Among them, E current is the current battery level, and E max is the maximum battery level of the vehicle battery; When it is high urgency, the charging pile power corresponding to the charging vehicle is not adjusted; when it is medium urgency, the charging pile power corresponding to the charging vehicle is adjusted to reduce the charging pile power; when it is low urgency, the charging pile power corresponding to the charging vehicle is adjusted to reduce the charging pile power or turn it off. Judging the utilization rate U of the charging piles. According to the ratio of the number of charging piles in use to the total number of charging piles, the utilization rate of the charging piles is calculated. Three levels of utilization rate judgment conditions are set, namely high load state, utilization rate U ≥ 70%; medium load state, 40% ≤ utilization rate U < 70%; low load state, utilization rate U > 40%. Among them, N active is the number of charging piles currently in use, and N total is the total number of charging piles; Regulate the charging piles according to the urgency and utilization rate. When it is in the high load state, preferentially reduce the charging power of the charging piles of low-urgency charging vehicles, and keep the charging power of the charging piles of medium-urgency and high-urgency charging vehicles unchanged; when it is in the medium load state, reduce the charging power of the charging piles of medium-urgency and low-urgency charging vehicles, and keep the charging power of the charging piles of high-urgency charging vehicles unchanged; when it is in the low load state, no adjustment is made.

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