Group dispatching and group control method and system for new energy transformer area based on minimum supply and sale loss

Abstract

The invention discloses a group dispatching and group control method and system for a new energy transformer area based on the minimum supply and sale loss, and belongs to the technical field of smart power grids, and the method comprises the steps: dividing equipment in the new energy transformer area into three types: a non-adjustable load, an adjustable load and an adjustable power supply; low-voltage distributed photovoltaic, energy storage equipment, charging piles and traditional electrical loads form new energy users according to user names; the method comprises the following steps: collecting electric power data of new energy users and transformer area gateways in a transformer area, and preprocessing the data; on the basis of actual requirements, corresponding weighted summation is carried out on the internet surfing loss rate and the mutual aid loss rate of the new energy user, and an adjustable power supply and an adjustable load in the new energy transformer area are regulated and controlled, so that the loss rate of weighted summation is the lowest; and after regulation and control, on the basis of the actual demand, selecting and calculating an internet access loss rate or a supply and sale loss rate of the transformer area as a judgment basis, judging whether a regulation and control target is reached or not, and if not, continuing regulation and control until the regulation and control target is reached.

Description

Technical Field

[0001] The present invention belongs to the technical field of smart grids, and specifically relates to a group adjustment and control method and system for a new energy station area based on minimum supply and sales losses. Background Art

[0002] In recent years, the installed capacity of distributed photovoltaic power generation has exploded and has gradually become an important part of the new power system. The installed capacity of the substation area has bottlenecks, and the installed capacity of photovoltaic power generation in many places has reached the upper limit. In some areas and at some times, the actual power generation capacity of distributed photovoltaic power generation has exceeded the actual local electricity demand, and household distributed photovoltaic power generation is facing the challenge of grid connection and absorption.

[0003] Distributed photovoltaic power generation is intermittent and uncertain. When the electricity generated by the photovoltaic system exceeds the immediate demand of the power grid, if there is not enough energy storage equipment or a flexible scheduling mechanism, the excess electricity may not be stored or transferred, which can easily lead to a waste of electricity. In addition, distributed photovoltaic equipment is usually located on the user side. If electricity needs to be transmitted over long distances to other areas for use, the actual available electricity will be reduced due to the loss of transmission lines, which will indirectly lead to energy waste. At present, distributed photovoltaics lack an effective scheduling and control mechanism, and it is difficult to flexibly adjust the power generation according to changes in electricity demand. It is urgent to explore new control strategies to improve local consumption capacity and reduce line losses.

[0004] The prior art document CN118971139A discloses a distributed photovoltaic control system and method, including: a distributed photovoltaic monitoring module for monitoring the operating status and data of photovoltaic equipment; a distributed photovoltaic prediction module for realizing short-term and medium-term distributed new energy power generation predictions for feeders and substations; a distributed photovoltaic group control module with regional photovoltaic control auxiliary peak regulation function; a photovoltaic carrying capacity assessment module for assessing the carrying capacity of the power grid for photovoltaic power generation access; a voltage quality analysis module for real-time monitoring of the voltage level of each node of the power grid; and a protection automatic analysis function module for quickly and accurately detecting fault conditions in the power grid and automatically calculating the set value of the protection device. The disadvantage is that the prior art mainly focuses on the user load characteristics, formulates the power supply plan of traditional energy and new energy according to the load characteristics, and reduces the supply of traditional energy by increasing the proportion of new energy, thereby reducing the loss of electric energy. This method is based on historical data for learning and prediction, and its stability and reliability are difficult to guarantee. Summary of the invention

[0005] In view of the explosive growth of distributed photovoltaic installed capacity and the lack of effective dispatching and control mechanism for distributed photovoltaics, which leads to the problem of waste of clean energy, the present invention discloses a method for group dispatching and group control of new energy substations in a power consumption system, which can effectively improve the flexibility of grid dispatching, realize the effective interaction between distributed adjustable power sources and loads in the substation, and promote the efficient use of clean energy in the substation. The specific scheme is as follows:

[0006] The first aspect of the present invention provides a group adjustment and control method for a new energy station area based on minimum supply and sale loss, comprising the following steps:

[0007] The equipment in the new energy area is divided into three types: non-adjustable load, adjustable load and adjustable power supply;

[0008] Low-voltage distributed photovoltaics, energy storage equipment, charging piles and traditional electricity loads are classified into new energy users according to user names;

[0009] Collect power data from new energy users and gateways in the substation area and pre-process the data;

[0010] According to the processed power data, based on actual needs, the online loss rate and mutual aid loss rate of new energy users are weighted and summed accordingly, and the adjustable power supply and adjustable load in the new energy area are regulated to minimize the weighted sum loss rate;

[0011] After regulation, based on the above actual needs, select and calculate the Internet access loss rate or supply and sales loss rate of the substation as the basis for judgment to determine whether the regulation target has been achieved. If not, continue to regulate until the regulation target is achieved.

[0012] Optionally, the power generation of the new energy users includes distributed photovoltaic power generation and distributed energy storage power generation, and the electricity consumption of the new energy users includes distributed energy storage charging, charging piles and traditional electricity consumption.

[0013] Optionally, the power data of new energy users in the substation area includes power generation power, power consumption power, online power and power generation;

[0014] The power data of the substation gateway includes forward power, online power, forward active power, reverse active power and power sales.

[0015] Optionally, the actual demand includes maximizing social and economic benefits and maximizing benefits to the power supply company;

[0016] When the social and economic benefits are maximized, the weights of the Internet access loss rate and mutual aid loss rate of new energy users are both 0.5, and the Internet access loss rate of the substation is selected as the basis for judgment;

[0017] When selecting a power supply company with the greatest benefit, the weight of the grid-connected loss rate for new energy users is assigned to 0, the weight of the mutual aid loss rate is assigned to 1, and the supply and sales loss rate of the substation is selected as the basis for judgment.

[0018] Optionally, the calculating of the Internet access loss rate of new energy users specifically includes:

[0019] The calculation model of the Internet access loss rate of new energy users in the substation area is as follows:

[0020]

[0021] Among them, δ 户t It represents the Internet access loss rate of the new energy user at time t;

[0022] P 户发t represents the power generation of the new energy user at time t;

[0023] P 户用t represents the power consumption of the user at time t;

[0024] P 户上网t Indicates the Internet access power of the user at time t.

[0025] Optionally, the calculating of the mutual aid loss rate of new energy users in the substation area specifically includes:

[0026] The calculation model of mutual aid loss rate of new energy users in the substation area is as follows:

[0027]

[0028] Among them, β 户t It represents the mutual aid loss rate of a new energy user in the substation at time t;

[0029] P 户上网t represents the online power of a new energy user at time t;

[0030] ∑P' 户用t It represents the total power consumption of all other users in the substation at time t;

[0031] P 关t It represents the forward power of the substation at time t;

[0032] ΣP' 户发t It represents the total power generated by all other users in the substation at time t.

[0033] Optionally, the calculating the area Internet access loss rate includes:

[0034]

[0035] Among them, δ 台trepresents the Internet access loss rate of the station area at time t;

[0036] ΣP 户发t It represents the total power generation of all new energy users in the substation at time t;

[0037] ΣP 户用t It represents the total power consumption of all users in the area at time t;

[0038] P 台上网t It represents the online power of the substation at time t, that is, the reverse power of the concentrator.

[0039] Optionally, the calculation model of the supply and sales loss rate of the substation is as follows:

[0040]

[0041] Among them, θ 台 It indicates the comprehensive supply and sales loss rate of the area over a period of time;

[0042] E 关正 Indicates the positive active energy at the substation gateway within a period of time;

[0043] E 关反 It indicates the reverse active electric energy at the substation gateway within a period of time;

[0044] ΣE 发 It indicates the total power generation of all renewable energy power generation equipment in the area within a period of time;

[0045] ΣE 售 It indicates the total electricity sales of all users in the substation area.

[0046] The second aspect of the present invention provides a group dispatching and group control system based on minimum supply and sale loss in a new energy station area. Based on the group dispatching and group control method based on minimum supply and sale loss in a new energy station area described in the first aspect of the present invention, the system comprises:

[0047] Equipment classification module, new energy user composition module, power data acquisition module, new energy user online loss rate calculation module, new energy user mutual aid loss rate calculation module, area online loss rate calculation module, area supply and sales loss rate calculation module and control module; the equipment classification module is used to divide the equipment in the new energy area into three types: non-adjustable load, adjustable load and adjustable power supply; the new energy user composition module is used to classify low-voltage distributed photovoltaic, energy storage equipment, charging piles and traditional power loads into new energy users according to user names; the power data acquisition module is used to collect power data of new energy users in the area and the area gateway power data and pre-process the data; the new energy user online loss rate calculation module is used to calculate the new energy user online loss rate; the new energy user mutual aid loss rate calculation module is used to calculate the new energy user mutual aid loss rate; the area online loss rate calculation module is used to calculate the area online loss rate; the area supply and sales loss rate calculation module is used to calculate the area supply and sales loss rate; the control module is based on the online loss rate and mutual aid loss rate of each new energy user, and in accordance with the principle of minimum loss rate, the adjustable power supply and adjustable load in the new energy area are controlled, and the control effect is verified by the area online loss rate and the area supply and sales loss rate.

[0048] Optionally, the power data acquisition module includes:

[0049] Each new energy equipment in the substation is installed with a two-way metering measurement point, and the substation checkpoints are equipped with checkpoint two-way metering measurement points to collect power data.

[0050] Compared with the prior art, the beneficial effects of the present invention include at least:

[0051] 1. Improve the refined management level of low-voltage new energy stations, reduce the supply-sales loss ratio, and improve the economic benefits of enterprises;

[0052] 2. Reduce power line losses and improve social benefits;

[0053] 3. Improve the flexibility of grid dispatching, realize effective interaction between distributed adjustable power sources and loads in the substation area, and promote the efficient use of clean energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the new energy station topology in the present invention. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only embodiments of a part of the present invention, not all embodiments. Based on the spirit of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0056] The present invention provides a group adjustment and control method for a new energy station area based on minimum supply and sale loss in Example 1, and the specific steps are as follows:

[0057] Step 1: Divide the equipment in the new energy area into three types: non-adjustable load, adjustable load, and adjustable power supply;

[0058] In a further preferred but non-limiting embodiment, step 1 further comprises:

[0059] like Figure 1 As shown, the substation area equipped with any of distributed photovoltaic, distributed energy storage, and electric vehicle charging piles is called a new energy substation area. The equipment in the new energy substation area is divided into three types: non-adjustable load, adjustable load, and adjustable power supply according to the power consumption and power generation properties and whether it is adjustable.

[0060] Specifically, for new energy user 1, distributed photovoltaics are adjustable power sources, distributed energy storage equipment is both an adjustable power source and an adjustable load, charging pile equipment is an adjustable load, and traditional electricity consumption is a non-adjustable load.

[0061] Step 2: low-voltage distributed photovoltaics, energy storage equipment, charging piles and traditional electricity loads are grouped into new energy users according to user names.

[0062] In a further preferred but non-limiting embodiment, the step 2 further comprises:

[0063] Among new energy users, power generation includes distributed photovoltaic power generation and distributed energy storage power generation, and electricity consumption includes distributed energy storage charging, charging piles and traditional electricity consumption.

[0064] Collect power data from new energy users and gateways in the substation area and pre-process the data;

[0065] In a further preferred but non-limiting implementation, in step 2, the power data of new energy users includes generated power, consumed power, online power and power generation, and the power data of the substation includes forward power, online power, forward active power, reverse active power and power sales.

[0066] Step 3: Collect power data from new energy users and gateways in the substation area and pre-process the data;

[0067] In a further preferred but non-limiting embodiment, the collection of power data from new energy users in the substation and the substation gateway includes: each new energy device in the substation is equipped with a two-way metering measurement point (generally a smart electricity meter), and the substation gateway is also equipped with a gateway two-way metering measurement point (generally a concentrator) for collecting power data.

[0068] In a further preferred but non-limiting embodiment, the data preprocessing includes sorting and cleaning the power data to ensure the validity and synchronization of the data.

[0069] Step 4: According to the processed power data and based on actual demand, the online loss rate and mutual aid loss rate of new energy users are weighted and summed accordingly, and the adjustable power source and adjustable load in the new energy area are regulated to minimize the weighted sum loss rate;

[0070] In a further preferred but non-limiting embodiment, in step 4, the actual demand includes maximum social and economic benefits and maximum benefits to the power supply company;

[0071] When the social and economic benefits are maximized, the weights of the Internet access loss rate and mutual aid loss rate of new energy users are both 0.5, and the Internet access loss rate of the substation is selected as the basis for judgment;

[0072] When selecting a power supply company with the greatest benefit, the weight of the grid-connected loss rate for new energy users is assigned to 0, the weight of the mutual aid loss rate is assigned to 1, and the supply and sales loss rate of the substation is selected as the basis for judgment.

[0073] In a further preferred but non-limiting embodiment, step 4 also includes performing corresponding control operations based on the weighted sum of the online loss rate and the mutual aid loss rate of new energy users. The user with a smaller online loss rate will be given priority in power generation during control. If there is a mutual aid situation, users with a smaller mutual aid loss rate will also be given priority in power generation.

[0074] Specifically, in step 4, the specific target of regulation is also related to the physical lines of the substation.

[0075] In a further preferred but non-limiting embodiment, the calculation of the Internet access loss rate of new energy users specifically includes:

[0076] The calculation model of the Internet access loss rate of new energy users in the substation area is as follows:

[0077]

[0078] Among them, δ 户t It represents the Internet access loss rate of the new energy user at time t;

[0079] P 户发t represents the power generation of the new energy user at time t;

[0080] P 户用t represents the power consumption of the user at time t;

[0081] P 户上网t Represents the online power of the user at time t. Specifically, when the power generation of new energy users is greater than the power consumption of new energy users, the excess power of the user will be sent to this substation, and this part of the power will be defined as the online power of new energy users. There is a certain consumption of the online power of new energy users during the transmission process within the user, and this consumption ratio is defined as the online loss rate of the new energy user. When the user line encounters a fault (for example, the line impedance is large, the off-meter power consumption is abnormal, etc.), there will be a large online loss rate. Therefore, the online loss rate will be an important indicator for evaluating the performance of the user's internal power grid. Here, the corresponding APP can be deployed in the concentrator at the distribution and transformation gateway, and the clocks of various metering devices in the entire substation can be synchronized by broadcasting. By collecting the power freezing curve of each metering device, the corresponding new energy user online loss rate can be calculated;

[0082] In a further preferred but non-limiting embodiment, the calculation of the mutual aid loss rate of new energy users in the substation area specifically includes:

[0083] The calculation model of mutual aid loss rate of new energy users in the substation area is as follows:

[0084]

[0085] Among them, β 户t It represents the mutual aid loss rate of a new energy user in the substation at time t;

[0086] P 户上网t represents the online power of a new energy user at time t;

[0087] ΣP' 户用t It represents the total power consumption of all other users in the substation at time t;

[0088] P 关t It represents the forward power of the substation at time t;

[0089] ΣP' 户发t It represents the total power generated by all other users in the substation at time t.

[0090] Specifically, when the power generated by new energy users is greater than the power consumed by new energy users, the amount of electricity that new energy users access the grid will be generated. If this amount of electricity is only consumed within the substation, this amount of electricity is defined as the mutual aid electricity of new energy users within the substation, also known as the local consumption of electricity by new energy users within the substation. There is a certain amount of consumption in the transmission process of the mutual aid electricity of new energy users from the access point to each user in the substation. This consumption ratio is defined as the mutual aid loss rate of the user in the substation. Therefore, the user mutual aid loss rate will be an important indicator for evaluating the performance of the power grid supplied by the user to the substation. Similarly, the corresponding APP can be deployed in the concentrator at the distribution and transformation gateway, and the clocks of each metering device in the entire substation can be synchronized through broadcast time synchronization. The mutual aid loss rate of the corresponding new energy user can be calculated by collecting the power freezing curve of each metering device.

[0091] In a further preferred but non-limiting embodiment, the calculation of the area Internet access loss rate specifically includes:

[0092] The calculation model of the network loss rate of the station area is as follows:

[0093]

[0094] Among them, δ 台t represents the Internet access loss rate of the station area at time t;

[0095] ∑P 户发t It represents the total power generation of all new energy users in the substation at time t;

[0096] ∑P 户用t It represents the total power consumption of all users in the area at time t;

[0097] P 台上网t It represents the online power of the substation at time t, that is, the reverse power of the concentrator.

[0098] Specifically, similar to the online loss rate of new energy users in the substation, when the total power generation of the new energy substation is greater than the power consumed by all loads in the substation, the excess power of the substation will be sent to the primary side of the distribution transformer. In this method, this part of the power is defined as the online power of the substation. During the transmission process within the substation, there is a certain consumption of the online power of the substation. This consumption ratio is defined as the online loss rate of the substation. In practical applications, the size of the online loss rate of the substation depends on the performance of the distribution line in the substation. Therefore, the online loss rate of the substation will be an important indicator for evaluating the performance of the power grid in the substation. Similarly, the corresponding APP can be deployed in the concentrator at the distribution transformer gateway, and the clocks of all metering devices in the entire substation can be synchronized by broadcasting time synchronization. The online loss rate of the corresponding substation can be calculated by collecting the power freezing curve of each metering device.

[0099] In a further preferred but non-limiting embodiment, the calculation of the supply and sales loss rate of the station area specifically includes:

[0100] The calculation model of the supply and sales loss rate of the substation is as follows:

[0101]

[0102] Among them, θ 台 It indicates the comprehensive supply and sales loss rate of the area over a period of time;

[0103] E 关正 Indicates the positive active energy at the substation gateway within a period of time;

[0104] E 关反 It indicates the reverse active electric energy at the substation gateway within a period of time;

[0105] ΣE 发 It indicates the total power generation of all renewable energy power generation equipment in the area within a period of time;

[0106] ∑E 售 It indicates the total electricity sales of all users in the area;

[0107] Specifically, when there are new energy equipment in the substation area to supply power to the substation area, within a period of time, the total power supply of the substation area is the sum of the power supply of the substation transformer and the power supply of new energy. The power supply sold by the substation area is the power consumed by each user load. The difference between the two is defined as the supply and sales loss power. The ratio of this loss to the total power supply of the substation area is defined as the supply and sales loss rate of the substation area during this period of time. In practical applications, the supply and sales loss rate of the substation area is of equal importance to the line loss rate of the traditional substation area. It is an important indicator for measuring substation management and an important indicator related to the revenue of the power supply company. Similarly, the corresponding APP can be deployed in the concentrator at the distribution and transformation gateway, and the clocks of all metering devices in the entire substation area can be synchronized through broadcast time synchronization. The supply and sales loss rate of the corresponding substation area can be calculated by collecting the power freezing curve of each metering device.

[0108] Step 5: After regulation, based on the above actual needs, select and calculate the Internet access loss rate or supply and sales loss rate of the substation as the basis for judgment to determine whether the regulation target has been achieved. If not, continue to regulate until the regulation target is achieved.

[0109] In a further preferred but non-limiting embodiment, the regulatory targets include:

[0110] When the social and economic benefits are the greatest, the area with the lowest Internet access loss rate is selected as the control target;

[0111] When selecting the power supply company with the greatest benefits, the substation with the lowest supply and sales loss rate is selected as the control target.

[0112] Specifically, when the Internet access loss rate or supply and sales loss rate of the substation is used as a control target, it also includes determining a range value based on the physical topology of the actual substation system.

[0113] Based on the above classification of load types in the substation and the established calculation model, for each new energy user, the user's Internet loss rate and user mutual aid loss rate are calculated. According to the principle of minimum loss rate, the adjustable power supply and adjustable load in the new energy substation are regulated to seek the optimal path for energy consumption (the path with the minimum power consumption), reduce line losses, promote the effective use of local energy, and reduce the difference between the power supply and sales in the substation. Ultimately, the optimal configuration of the supply and sales loss of the new energy substation is achieved, the Internet loss rate and the supply and sales loss rate of the substation are reduced, the effective interaction between the distributed adjustable power supply and load in the substation is achieved, and the efficient use of clean energy is promoted.

[0114] In embodiment 2, the present invention provides a group dispatching and group control system based on minimum supply and sale loss in a new energy station area. Based on the group dispatching and group control method based on minimum supply and sale loss in a new energy station area described in embodiment 1, the system includes:

[0115] Equipment classification module, new energy user composition module, power data acquisition module, new energy user online loss rate calculation module, new energy user mutual aid loss rate calculation module, area online loss rate calculation module, area supply and sales loss rate calculation module and control module; the equipment classification module is used to divide the equipment in the new energy area into three types: non-adjustable load, adjustable load and adjustable power supply; the new energy user composition module is used to form new energy users according to user names of low-voltage distributed photovoltaic, energy storage equipment, charging piles and traditional power loads; the power data acquisition module is used to collect power data of new energy users and area gateways in the area, and to Preprocessing is performed; the new energy user online loss rate calculation module is used to calculate the new energy user online loss rate; the new energy user mutual aid loss rate calculation module is used to calculate the new energy user mutual aid loss rate; the area online loss rate calculation module is used to calculate the area online loss rate; the area supply and sales loss rate calculation module is used to calculate the area supply and sales loss rate; the control module is based on the above classification of the area load type and the user's user online loss rate and user mutual aid loss rate, and in accordance with the principle of minimum loss rate, regulates the adjustable power supply and adjustable load in the new energy area to seek the optimal path for energy consumption (the path with the minimum power consumption) and reduce line losses.

[0116] In summary, most of the existing relevant control systems and methods focus on the user load characteristics, formulate power supply plans for traditional energy and new energy according to the load characteristics, and reduce the supply of traditional energy by increasing the proportion of new energy, thereby reducing the loss of electric energy. The traditional method is based on historical data for learning and prediction, and its stability and reliability are difficult to guarantee. In addition to the relevant control according to the load characteristics, the present invention also focuses on where the power loss in the substation is consumed in the line. Through the control method, the electric energy required by the substation is transmitted through a path with a smaller line impedance, avoiding the transmission of electric energy through a path with a larger line impedance, thereby reducing the loss of electric energy, improving the level of refined management of the substation, and improving the economic benefits of the enterprise. Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation of the present invention can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not deviate from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A group adjustment and control method for a new energy station area based on minimum supply and sale loss, characterized in that: The steps include: The equipment in the new energy area is divided into three types: non-adjustable load, adjustable load and adjustable power supply; Low-voltage distributed photovoltaics, energy storage equipment, charging piles and traditional electricity loads are classified into new energy users according to user names; Collect power data from new energy users and gateways in the substation area and pre-process the data; According to the processed power data, based on actual needs, the online loss rate and mutual aid loss rate of new energy users are weighted and summed accordingly, and the adjustable power supply and adjustable load in the new energy area are regulated to minimize the weighted sum loss rate; After regulation, based on the above actual needs, select and calculate the Internet access loss rate or supply and sales loss rate of the substation as the basis for judgment to determine whether the regulation target has been achieved. If not, continue to regulate until the regulation target is achieved.

2. According to claim 1, a group adjustment and control method for a new energy station area based on minimum supply and sale loss is characterized by: The power generation of new energy users includes distributed photovoltaic power generation and distributed energy storage power generation, and the electricity consumption of new energy users includes distributed energy storage charging, charging piles and traditional electricity consumption.

3. According to claim 1, a group adjustment and control method for a new energy station area based on minimum supply and sale loss is characterized in that: The power data of new energy users in the said area. The power data of new energy users includes power generation, power consumption, power on-grid and power generation; The power data of the substation gateway includes forward power, online power, forward active power, reverse active power and power sales.

4. According to claim 1, a group adjustment and control method for a new energy station area based on minimum supply and sale loss is characterized in that: The actual needs include maximizing social and economic benefits and maximizing benefits for the power supply company; When the social and economic benefits are maximized, the weights of the Internet access loss rate and mutual aid loss rate of new energy users are both 0.5, and the Internet access loss rate of the substation is selected as the basis for judgment; When selecting a power supply company with the greatest benefit, the weight of the grid-connected loss rate for new energy users is assigned to 0, the weight of the mutual aid loss rate is assigned to 1, and the supply and sales loss rate of the substation is selected as the basis for judgment.

5. A group adjustment and control method for a new energy station area based on minimum supply and sale loss according to claim 1 or 3, characterized in that: The calculation of the Internet access loss rate of new energy users specifically includes: The calculation model of the Internet access loss rate of new energy users in the substation area is as follows: Among them, δ 户t It represents the Internet access loss rate of the new energy user at time t; P 户发t represents the power generation of the new energy user at time t; P 户用t represents the power consumption of the user at time t; P 户上网t Indicates the Internet access power of the user at time t.

6. A group adjustment and control method for a new energy station area based on minimum supply and sale loss according to claim 1 or 3, characterized in that: The calculation of the mutual aid loss rate of new energy users in the substation area specifically includes: The calculation model of mutual aid loss rate of new energy users in the substation area is as follows: Among them, β 户t It represents the mutual aid loss rate of a new energy user in the substation at time t; P 户上网t represents the online power of a new energy user at time t; ∑P' 户用t It represents the total power consumption of all other users in the substation at time t; P 关t It represents the forward power of the substation at time t; ∑P' 户发t It represents the total power generated by all other users in the substation at time t.

7. A group adjustment and control method for a new energy station area based on minimum supply and sale loss according to claim 1 or 3, characterized in that: The calculation of the area Internet access loss rate includes: Among them, δ 台t represents the Internet access loss rate of the station area at time t; ∑P 户发t It represents the total power generation of all new energy users in the substation at time t; ∑P 户用t It represents the total power consumption of all users in the area at time t; P 台上网t It represents the online power of the substation at time t.

8. A group adjustment and control method for a new energy station area based on minimum supply and sale loss according to claim 1 or 3, characterized in that: The calculation model of the supply and sales loss rate of the substation is as follows: Among them, θ 台 It indicates the comprehensive supply and sales loss rate of the area over a period of time; E 关正 Indicates the positive active energy at the substation gateway within a period of time; E 关反 It indicates the reverse active electric energy at the substation gateway within a period of time; ∑E 发 It indicates the total power generation of all renewable energy power generation equipment in the area within a period of time; ∑E 售 It indicates the total electricity sales of all users in the substation area.

9. A group dispatching and control system based on minimum supply and sale loss for a new energy station area, based on a group dispatching and control method based on minimum supply and sale loss for a new energy station area according to any one of claims 1 to 8, characterized in that: The system includes: Equipment classification module, new energy user composition module, power data acquisition module, new energy user online loss rate calculation module, new energy user mutual aid loss rate calculation module, area online loss rate calculation module, area supply and sales loss rate calculation module and control module; the equipment classification module is used to divide the equipment in the new energy area into three types: non-adjustable load, adjustable load and adjustable power supply; the new energy user composition module is used to classify low-voltage distributed photovoltaic, energy storage equipment, charging piles and traditional power loads into new energy users according to user names; the power data acquisition module is used to collect power data of new energy users in the area and the area gateway power data and pre-process the data; the new energy user online loss rate calculation module is used to calculate the new energy user online loss rate; the new energy user mutual aid loss rate calculation module is used to calculate the new energy user mutual aid loss rate; the area online loss rate calculation module is used to calculate the area online loss rate; the area supply and sales loss rate calculation module is used to calculate the area supply and sales loss rate; the control module is based on the online loss rate and mutual aid loss rate of each new energy user, and in accordance with the principle of minimum loss rate, the adjustable power supply and adjustable load in the new energy area are controlled, and the control effect is verified by the area online loss rate and the area supply and sales loss rate.

10. A group control system based on minimum supply and sale loss for new energy stations, characterized by: The power data acquisition module includes: Each new energy equipment in the substation is installed with a two-way metering measurement point, and the substation checkpoints are equipped with checkpoint two-way metering measurement points to collect power data.

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