Power distribution network balance control method and system based on balance responsibility subject mode

Abstract

The invention discloses a power distribution network balance control method and system based on a balance responsibility main body mode in the technical field of power distribution network regulation control, and the method comprises the steps: building a three-layer balance control system of a balance settlement unit, a balance responsibility main body and a power distribution network management main body based on a physical architecture of flexible resource polymer-distribution network grid-distribution / county regulation; the power distribution network management main body formulates and issues a next-day plan operation curve of each balance responsibility main body; the power distribution network management main body corrects the planned operation curve of each balance responsibility main body; balancing deviation of the balancing responsibility subjects is made up through interaction among the balancing responsibility subjects and adjustment of internal resources; and the power distribution network management main body and the balance responsibility main body carry out multi-level balance deviation assessment, and balance deviation assessment responsibility is decomposed to each balance settlement unit. The balance responsibility main body and the balance settlement unit are introduced, balance responsibility sinking is decomposed, and green, economical and safe operation of a power grid under the background of distributed source load high-speed development is facilitated.

Description

Technical Field

[0001] The present invention belongs to the technical field of distribution network regulation and control, and specifically relates to a distribution network balancing control method and system based on a balancing responsibility subject mode. Background Art

[0002] With the large-scale access of new sources and loads such as distributed photovoltaics and electric vehicles to the distribution network, the uncertainty and uncontrollability of their output have made the power system face an increasingly complex operating environment and more diverse balance needs. The traditional power grid dispatching mechanism is often concentrated at the main grid level. The dispatching and control capabilities of the distribution network level are relatively weak, and the control architecture is not yet perfect. The regulation capabilities of a large number of new sources and loads with flexible and adjustable potential have not been fully utilized. To achieve efficient utilization of flexible and adjustable source and load resources and assist in the multi-level balanced operation of the power grid, it is necessary to break through the existing architectural limitations and build a balanced control architecture that can achieve coordinated interaction between distributed resources and the power grid. Summary of the invention

[0003] In view of the problem that the current distribution network level balance control architecture has not been built and the massive new sources and loads with flexible adjustment capabilities have not been fully utilized, the present invention proposes a distribution network balance control method and system based on the balance responsibility subject model. The "balance responsibility subject model" generally refers to a management strategy that assigns the balance responsibility of the power system to different subjects to ensure the balance between power supply and demand. Its core lies in clarifying the responsibilities and obligations of each participant and coordinating the behaviors of each subject to achieve stable operation of the power grid and reliable power supply. The distribution network balance control method and system based on the balance responsibility subject model proposed in the present invention can be used for the balance control of distributed source and load resources such as distributed photovoltaics and electric vehicles on the distribution network side. By decomposing the balance responsibility of the large power grid layer by layer to the balance responsibility subject, it promotes its actual power generation and consumption to fit the planned operation curve, reduces the balance deviation of the power grid, and supports the two-way coordinated friendly interaction and sustainable development of distributed source and load resources and the distribution network.

[0004] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0005] In a first aspect, the present invention provides a distribution network balancing control method based on a balancing responsible subject mode, comprising:

[0006] Based on the three-layer distribution network balance control physical architecture "flexible resource aggregation-distribution network grid-distribution / county dispatch", a three-layer balance control system of "balance settlement unit-balance responsibility entity-distribution network management entity" is constructed;

[0007] Based on the main grid requirements and source-load characteristics, the distribution network management entity formulates and issues the next day's planned operation curve to each balancing responsible entity;

[0008] According to the deviation between the ultra-short-term power forecast carried out by the balancing responsible party within the day and the short-term power forecast carried out the day before, the planned operation curve of each balancing responsible party is corrected through the distribution network management entity;

[0009] The balancing responsible entity monitors the changes in power supply and demand of each balancing settlement unit in real time, and compensates for the balancing responsible entity's balance deviation through interaction and adjustment of internal resources among the balancing responsible entities; the balance deviation refers to the deviation between the planned curve of power generation and power consumption accumulated by all users within the balancing responsible entity and the actual operation curve;

[0010] Multi-level balance deviation assessment is carried out through the distribution network management entity and the balancing responsible entity, and the responsibility for balance deviation assessment is decomposed to each balancing responsible entity and each balancing settlement unit.

[0011] Preferably,

[0012] The balancing and settlement unit corresponds to the flexible resource aggregate, and is used to monitor the power data of the internal power generation and consumption resources, and provide the data to the balancing responsible entity as required, so that the deviation between the accumulated power generation and consumption plan curves of all internal users and the actual operation curves is zero;

[0013] The balancing responsible entity corresponds to the distribution network grid, and the balancing responsible entity is used to manage multiple balancing settlement units in the distribution network grid; predict the power generation and consumption of the balancing settlement units and report them to the distribution network management entity; monitor the changes in power supply and demand of each balancing settlement unit within the balancing responsible entity; optimize the power generation and consumption within the balancing settlement unit to reduce the balance deviation; accept the balance deviation assessment of the distribution network management entity, and decompose the responsibility for the balance deviation assessment to the balancing settlement unit according to the contract;

[0014] The distribution network management entity corresponds to the distribution / county dispatch. The distribution network management entity is used to rely on the municipal distribution automation system to aggregate grid user data and push it to the regional dispatch, and receive the regional distribution network plan operation curve formulated by the regional dispatch; based on distributed source and load data, it is responsible for the formulation, correction and issuance of the planned operation curves of each balancing responsible entity; and is responsible for the balance deviation assessment of each balancing responsible entity.

[0015] Preferably, the planned operation curve for the next day is formulated and issued to each balancing responsible entity by the distribution network management entity based on the main grid requirements and source-load characteristics, including:

[0016] Collect the internal source and load resource data of the balancing settlement unit and upload it to the balancing responsible entity;

[0017] The responsible entity for balancing shall predict the power generation and consumption curve of each balancing settlement unit the next day based on the historical and real-time measurement data of each balancing settlement unit, and report it to the distribution network management entity;

[0018] The distribution network management entity will decompose the regional distribution network plan operation curve and issue it to each balancing responsible entity based on the next day's power generation and consumption forecast reported by each balancing responsible entity and the regional distribution network plan operation curve issued by the regional dispatch.

[0019] Preferably, the method of correcting the planned operation curve of each balancing responsible entity through the distribution network management entity according to the deviation between the ultra-short-term power expectation carried out by the balancing responsible entity within the day and the short-term power forecast carried out a day ago includes:

[0020] The responsible entity for balancing shall make ultra-short-term rolling power generation and consumption forecasts based on the intraday measurement data, and report the deviation between the ultra-short-term forecast and the day-ahead short-term forecast results to the distribution network management entity;

[0021] The distribution network management entity modifies the planned operation curve of each balancing responsible entity based on the deviation and issues it.

[0022] Preferably, the distribution network management entity amends and issues the planned operation curve of each balancing responsible entity based on the deviation, including:

[0023] The frequency of revision and issuance is every 15 minutes, and the revised plan operation curve is:

[0024] ;

[0025] in, To balance the responsibility exist The planned operating power correction value at the moment, for The planned operating power of the distribution network management entity at all times, To balance the responsibility exist The short-term predicted power at the moment, To balance the responsibility exist The predicted power correction value at the time is the difference between the ultra-short-term prediction value within the day and the short-term prediction value the day before. For all balancing responsible entities The sum of the predicted power after time correction.

[0026] Preferably, the real-time monitoring of the power supply and demand changes of each balancing settlement unit by the balancing responsible entity and the compensation of the balancing deviation of the balancing responsible entity by interaction between the balancing responsible entities and adjustment of internal resources include:

[0027] The responsible entity for balancing monitors the changes in power supply and demand of each balancing settlement unit in real time. If it finds that the real-time deviation exceeds the expectations of the responsible entity at the hourly level in advance, it will report the demand for unbalanced volume trading to the distribution network management entity and reduce the balance deviation through interaction with other responsible entities for balancing.

[0028] If there is an imbalance in real-time supply and demand due to load, new energy output forecast deviation, generator failure or load demand change during the real-time minute-level operation stage, the balancing responsible party will directly regulate the flexible and adjustable resources within the balancing settlement unit to reduce the balancing deviation.

[0029] Preferably, a multi-level balance deviation assessment is performed by the distribution network management entity and the balance responsible entity, and the balance deviation assessment responsibility is decomposed to each balance responsible entity and each balance settlement unit, including:

[0030] After real-time power delivery, the prefecture-level city dispatching automation system conducts a balance deviation assessment on the distribution network management entity;

[0031] The distribution network management entity conducts balance deviation assessment based on the actual deviation and historical performance of each balancing responsible entity;

[0032] The balancing responsible entity shall allocate the balancing deviation assessment costs to each balancing settlement unit based on the contract signed between it and the balancing settlement unit and the actual operating curve of each balancing settlement unit.

[0033] Preferably, the prefecture-level city dispatching automation system performs a balance deviation assessment on the distribution network management subject, including:

[0034] The balance deviation assessment is carried out in fifteen minutes as the minimum unit, as follows:

[0035] ;

[0036] in, is the balance deviation cost of the distribution network management entity, is the direction determination factor, is the unbalanced settlement unit price, is the deviation electricity in the settlement period,

[0037] It is expressed as:

[0038] ;

[0039] in, The adjustment costs incurred by calling up the reserve adjustment capacity, In order to obtain the additional electric energy gain during negative regulation, It is the sum of the positive reserve regulation capacity and the negative reserve regulation capacity called;

[0040] It is expressed as:

[0041] ;

[0042] in, and They are The actual power consumption curve and planned power consumption curve of the distribution network management entity at each moment.

[0043] Preferably, the distribution network management entity conducts a balance deviation assessment based on the actual deviation and historical performance of each balance responsible entity, including:

[0044] The balance deviation assessment fee is calculated as follows:

[0045] ;

[0046] in, To balance the balance deviation assessment costs of the responsible entity, is the profit coefficient of the distribution network management entity, >1, To balance the proportion of the imbalance of the responsible entity to all imbalances, The historical balance performance of the balancing responsible entity; the proportion of the imbalance of the balancing responsible entity to all imbalances is calculated as follows:

[0047] ;

[0048] in, Balancing the responsible parties The proportion of the unbalance amount to all unbalance amounts, To balance the responsibility The imbalance The amount of imbalance generated by all balancing responsible entities;

[0049] The calculation is as follows:

[0050] ;

[0051] in, To balance the responsibility In the past The performance score in the balance deviation assessment is In the balance deviation assessment, the balance responsible party If the unbalanced amount is less than the average unbalanced amount of all balancing responsible entities, the integral is 1, otherwise it is 0. The total number of balance deviation assessments.

[0052] In a second aspect, the present invention provides a distribution network balancing control system based on a balancing responsible subject mode, comprising:

[0053] The balancing and settlement unit corresponds to the flexible resource aggregate. The balancing and settlement unit is used to monitor the power data of the internal power generation and consumption resources and provide the data to the balancing responsible entity as required, so that the deviation between the accumulated power generation and consumption plan curves of all internal users and the actual operation curves is zero;

[0054] The balancing responsible entity corresponds to the distribution network grid. The balancing responsible entity is used to manage multiple balancing settlement units within the distribution network grid; predict the power generation and consumption of the balancing settlement units and report it to the distribution network management entity; monitor the changes in power supply and demand of each balancing settlement unit within the balancing responsible entity; optimize the power generation and consumption within the balancing settlement unit to reduce the balance deviation; accept the balance deviation assessment of the distribution network management entity, and decompose the responsibility for the balance deviation assessment to the balancing settlement unit according to the contract;

[0055] The distribution network management entity corresponds to the distribution / county dispatch. The distribution network management entity is used to rely on the municipal distribution automation system to aggregate grid user data and push it to the regional dispatch, and receive the regional distribution network plan operation curve formulated by the regional dispatch; based on distributed source and load data, it is responsible for the formulation, correction and issuance of the planned operation curves of each balancing responsible entity; and is responsible for the balance deviation assessment of each balancing responsible entity.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] (1) The present invention introduces a balancing responsibility entity and a balancing settlement unit, constructs a balancing control method for distributed source and load resources on the distribution network side, and decomposes the balancing responsibility, which is conducive to stimulating the balancing regulation potential of flexible and adjustable resources on the distribution network side to participate in the operation of the power grid, and promoting the green, economical and safe operation of the power grid under the background of the rapid development of distributed sources and loads.

[0058] (2) The present invention proposes a multi-level balance deviation assessment method between the distribution network management entity, the balance responsibility entity and the balance settlement unit, so as to achieve fair sharing and settlement of imbalance responsibilities, encourage each entity to accurately formulate its power generation and consumption plan curve and operate according to the plan, ensure the fairness of each entity's participation in regulation, and help to ensure the enthusiasm of distributed resources to participate in the regulation and operation of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein:

[0060] Figure 1 A flow chart of a distribution network balancing control method based on a balancing responsible subject mode provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0062] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0063] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, elements, steps or components, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0064] It should be emphasized here that the step marks mentioned below are not intended to limit the order of the steps, but it should be understood that the steps can be executed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be executed simultaneously.

[0065] The embodiment of the present invention provides a distribution network balancing control method based on a balancing responsible subject mode, which can be applied to active distribution networks with massive new distributed sources and loads connected, such as Figure 1 As shown, the following steps are included:

[0066] Step S1, based on the three-layer distribution network balancing control physical architecture of "flexible resource aggregation-distribution network grid-distribution / county dispatch", build a three-layer distribution network balancing control system of "balancing settlement unit-balancing responsible entity-distribution network management entity".

[0067] In a specific implementation of the embodiment of the present invention, the specific implementation process of step S1 is:

[0068] (S11) The balancing settlement unit is a financial settlement account and the smallest unit of balancing settlement. It physically corresponds to a flexible resource aggregate, including conventional power sources, distributed power sources, energy storage, user-side loads and other multiple entities. The balance means that the deviation between the planned power generation and power consumption curve accumulated by all users within it and the actual operation curve is zero. The power generation and power consumption within the unit are predicted and managed by the party responsible for balancing.

[0069] Specifically, the balancing settlement unit signs an agreement with the balancing responsible entity to clarify the requirements in terms of data exchange, balancing deviation management and financial settlement. It is responsible for monitoring the power data of internal power generation and consumption resources, and provides the data to the balancing responsible entity as required to ensure the accuracy and timeliness of data transmission.

[0070] (S12) The balancing responsible entity corresponds to the distribution grid, manages multiple balancing settlement units within the grid, and assumes the responsibility for assessing the deviation between the power forecast and actual operation of the balancing settlement unit. Each balancing settlement unit must have a balancing responsible entity, and a balancing responsible entity can manage multiple balancing settlement units.

[0071] Specifically, the distribution network grid can be dynamically partitioned according to the real-time load conditions and network status through clustering, graph theory and other algorithms to optimize source and load resource allocation and improve grid management efficiency.

[0072] Specifically, the balancing responsibility entity may also be power sales companies, virtual power plants and other entities.

[0073] Specifically, the functions of the balancing responsible entity include: being responsible for power generation and consumption forecasting; being responsible for reporting power generation and consumption curves to the distribution network management entity; being responsible for monitoring changes in power supply and demand within the balancing responsible entity, optimizing the power generation / consumption resource output within the balancing settlement unit to reduce the balance deviation; accepting the balance deviation assessment of the distribution network management entity, and decomposing the deviation cost to the balancing settlement unit according to the contract.

[0074] (S13) The distribution network management entity corresponds to the distribution / county dispatching department, which is responsible for the balance calculation at the district and county distribution network level and is the core supporting entity in the balance control architecture; the distribution / county dispatching department relies on the municipal distribution automation system and the provincial distribution automation cloud master station, accesses massive distributed source and load data, and fully supports holographic perception of distribution network data, real-time operation status monitoring and balance deviation assessment.

[0075] Specifically, the distribution network management entity relies on the municipal distribution automation system to aggregate grid user data and push it to the regional dispatching, and receives the regional distribution network plan operation curve formulated by the regional dispatching; based on distributed source and load data, it is responsible for the formulation and issuance of the planned operation curves of each balancing responsible entity; and is responsible for the deviation assessment between the planned curves of each balancing responsible entity and the actual operation curves.

[0076] Step S2: The distribution network management entity formulates and issues the next day's planned operation curve to each balancing responsible entity in combination with the main network requirements and source-load characteristics.

[0077] In a specific implementation of the embodiment of the present invention, the specific implementation process of step S2 is:

[0078] (S21) Full collection and upload monitoring of source and load resource data within the balancing settlement unit.

[0079] Specifically, on the low-voltage user side, through intelligent switches, meters, plug-and-play units and other terminal devices, the operation data of distributed resources such as users, photovoltaics, and charging piles are collected. On the distribution station side, the intelligent fusion terminal is configured to realize the user side data aggregation, and the aggregated user data is transmitted to the balancing responsible entity and the distribution / county dispatcher through the wireless communication channel to realize the real-time collection of current, voltage, power and other information. At the same time, the communication link is also a channel for real-time interaction of regulation control instructions.

[0080] (S22) Prediction and reporting of the power generation and consumption plan curve of the day before by the balancing responsible entity. Based on the historical and real-time measurement data of each balancing settlement unit, the balancing responsible entity predicts the power generation and consumption curve of each balancing settlement unit the next day and reports it to the distribution network management entity.

[0081] Specifically, for electricity users on the demand side, the "power generation and consumption power forecast" function requires that large customers conduct short-term load forecasts on the day before, and small customers fit the power consumption curve by historical load fitting; for power generation users on the power supply side, if there are small and medium-sized traditional units (small gas units, biogas power generation units, etc.), there is no need to conduct forecasts, and the next day's output curve can be directly obtained by starting the units. The start and stop and output control of the units can be carried out in the real-time operation stage. Other distributed power sources represented by distributed photovoltaics need to conduct short-term power forecasts on the day before.

[0082] (S23) Distribution network management entity formulates and issues planned operation curves. The distribution network management entity decomposes the regional distribution network planned operation curves and issues them to each balancing responsible entity based on the predicted values ​​of the next day's power generation and consumption curves reported by each balancing responsible entity and the regional distribution network planned operation curves issued by the regional dispatch.

[0083] Specifically, the decomposition algorithm can use the proportional allocation method to allocate in proportion according to the planned power generation and consumption curves of each balancing responsible entity. The decomposition algorithm of the distribution network management entity can be expressed as:

[0084] (1)

[0085] in, for The planned operating power of the distribution network management entity at all times, and Balance Responsibility Subject exist The planned operating power and predicted power at the moment, For all balancing responsible entities The sum of the predicted powers at the moment.

[0086] Optionally, other decomposition algorithms can be robust optimization decomposition algorithms that take into account the uncertainty of distributed photovoltaic output. Combined with the distributed photovoltaic output within each balancing responsible entity, the regional distribution network plan operation curve is allocated to each balancing responsible entity through a robust optimization algorithm to reduce the uncertainty problems that may be encountered in real-time operation.

[0087] Step S3, the distribution network management entity during the day amends the planned operation curve of each balancing responsible entity based on the deviation between the ultra-short-term forecast conducted by the balancing responsible entity during the day and the short-term forecast conducted the day before.

[0088] In a specific implementation of the embodiment of the present invention, the specific implementation process of step S3 is:

[0089] (S31) The responsible party for balancing shall carry out ultra-short-term rolling power generation and consumption forecast based on the daily measurement data, and report the deviation between the ultra-short-term forecast and the short-term forecast results of the day before to the distribution network management entity.

[0090] Specifically, the entity responsible for balancing can continuously revise the power generation and consumption forecast value 15 minutes before the actual power supply time, and update it to the distribution network management entity on a rolling basis.

[0091] (S32) The distribution network management entity modifies the planned operation curve of each balancing responsible entity and issues it.

[0092] Specifically, the frequency of correction and issuance is every 15 minutes, and the correction algorithm of the distribution network management entity can be expressed as:

[0093] (2)

[0094] in, To balance the responsibility exist The planned operating power correction value at the moment, To balance the responsibility exist The predicted power correction value at the time is the difference between the ultra-short-term prediction value within the day and the short-term prediction value the day before. For all balancing responsible entities The sum of the predicted power after time correction.

[0095] Step S4: The balancing responsible entity monitors the changes in power supply and demand of each balancing settlement unit in real time, and reduces the balance deviation by interacting with other balancing responsible entities and adjusting internal resources. The balance deviation refers to the deviation between the planned curve of power generation and power consumption accumulated by all users within the balancing responsible entity and the actual operation curve.

[0096] In a specific implementation of the embodiment of the present invention, the specific implementation process of step S4 is:

[0097] (S41) The responsible entity for balancing monitors the changes in power supply and demand of each balancing settlement unit in real time. If it finds that the real-time deviation exceeds the expectations of the responsible entity at the hourly level in advance, it shall report the demand for unbalanced quantity trading to the distribution network management entity and reduce the balance deviation through interaction with other responsible entities for balancing.

[0098] Specifically, if the weather changes rapidly from sunny and windless to rainy and windy, the distributed photovoltaic output of the balancing responsible entity a drops sharply during real-time operation (within 15 minutes), and its actual power generation is far less than the planned power generation (the planned power generation curve may have a large negative deviation); at the same time, due to short-term weather changes and strong internal wind power generation, the actual power generation of the balancing responsible entity b is far greater than the planned power generation (the planned power generation curve has a large positive deviation). At this time, both parties can submit imbalance information and buying and selling demands to the distribution network management entity, and the distribution network management entity will match transactions based on supply and demand to reduce their respective imbalances.

[0099] (S42) If there is an imbalance between supply and demand due to load, new energy output forecast deviation, generator failure or load demand change during the real-time minute-level operation stage, the balancing responsible party directly regulates the flexible and adjustable resources within the balancing settlement unit.

[0100] Specifically, flexible and adjustable resources include energy storage equipment, small and medium-sized traditional units (small gas-fired units, etc.), interruptible loads, and distributed photovoltaics with control conditions.

[0101] Specifically, the regulation of distributed photovoltaics is achieved through the hardware architecture of "balancing responsible entity-intelligent fusion terminal-plug-and-play communication unit-photovoltaic inverter". The plug-and-play communication unit communicates with the photovoltaic inverter through RS485, and sends the photovoltaic inverter data to the intelligent fusion terminal through HPLC / RF dual-mode communication. The intelligent fusion terminal uploads the data to the balancing responsible entity and the distribution automation master station through the 4G / 5G wireless network. The balancing responsible entity can issue control instructions to distributed photovoltaic equipment through this hardware architecture, and the intelligent fusion terminal adjusts the output power of the photovoltaic inverter according to the instructions issued by the balancing responsible entity.

[0102] Step S5: Multi-level balance deviation assessment is carried out between the distribution network management entity, the balance responsible entity and the balance settlement unit.

[0103] In a specific implementation of the embodiment of the present invention, the specific implementation process of step S5 is:

[0104] (S51) After real-time power delivery, the prefecture-level city dispatching automation system conducts a balance deviation assessment on the distribution network management entity.

[0105] Specifically, the balance deviation cost of the distribution network management entity The calculation method of is as follows:

[0106] (3)

[0107] in, It is the direction judgment factor. When the unbalanced electricity is beneficial to the system balance, it will be rewarded and the direction judgment factor is positive. On the contrary, when the unbalanced electricity aggravates the system imbalance, it will be punished and the direction judgment factor is negative. is the unbalanced settlement unit price, calculated as in formula (4); is the deviation electricity in the settlement period, calculated as formula (5):

[0108] (4)

[0109] in, The regulation costs incurred by the dispatching agency in calling on the system's reserve regulation capacity to maintain the balance of the large power grid; The additional electric energy gain is when negative regulation is performed by using more electricity through adjustable loads; It is the net balance reserve of the system, which is the sum of the positive reserve regulation capacity and negative reserve regulation capacity called by the system.

[0110] (5)

[0111] in, and They are The actual power consumption curve and planned power consumption curve of the distribution network management entity at each moment are evaluated for balance deviation with fifteen minutes as the minimum unit.

[0112] (S52) The distribution network management entity shall conduct a balance deviation assessment based on the actual deviation and historical performance of each balancing responsible entity.

[0113] Specifically, the calculation method of the balance deviation assessment fee of a certain balance responsible entity is as follows:

[0114] (6)

[0115] in, It is the balance deviation assessment fee of the distribution network management entity. is the profit coefficient of the distribution network management entity, >1; To balance the responsibility The ratio of the unbalance amount to all unbalance amounts is calculated as shown in formula (7); To balance the responsibility The historical equilibrium performance of is calculated as in formula (8).

[0116] Specifically, assuming that the overall imbalance of the distribution network management entity is +10MWh (more electricity than planned), the balancing responsible entity The imbalance is -2MWh (less electricity than planned). The value is -0.2. Assuming that the overall imbalance (more electricity consumption) of the distribution network management entity is beneficial to the system balance for the large power grid (the system has a surplus of power generation at this time, and needs to reduce power generation and increase load), the direction judgment factor Positive; comprehensive consideration of direction judgment factors (positive) and direction, at this time, balance the responsible subject Those with negative impact on the balance of the large power grid will be assessed.

[0117] (7)

[0118] in, To balance the responsibility The imbalance is the deviation between the planned curve of power generation and power consumption of the responsible entity and the actual operation curve. The imbalance amount generated by all balancing responsible entities, Distinguishing between positive and negative, representing the subject of balance responsibility The contribution of the imbalance to the overall imbalance of the distribution network management entity is positive or negative.

[0119] (8)

[0120] in, To balance the responsibility In the past The performance score in the balance deviation assessment is In the balance deviation assessment, the balance responsible party If the unbalanced amount is less than the average unbalanced amount of all balancing responsible entities, the integral is 1, otherwise it is 0; The total number of balance deviation assessments to be considered, normally one year.

[0121] (S53) The balancing responsible party shall distribute the responsibility for balance deviation assessment to each balancing settlement unit based on the contract signed between the balancing settlement unit and the actual operation curve of each balancing settlement unit.

[0122] Specifically, the contract signed between the balancing responsible party and the balancing settlement unit specifies the responsibility allocation mechanism, which is usually allocated according to a fixed responsibility ratio, such as the balancing responsible party bears 30% of the assessment fee and the balancing settlement unit bears 70% of the assessment fee. Each balancing settlement unit allocates the balancing deviation responsibility according to the relative share of its absolute value of power generation and consumption in the whole.

[0123] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0124] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0125] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0126] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0127] 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 above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart 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 distribution network balancing control method based on a balancing responsible subject model, characterized in that: include: Based on the three-layer distribution network balance control physical architecture "flexible resource aggregation-distribution network grid-distribution / county dispatch", a three-layer balance control system of "balance settlement unit-balance responsibility entity-distribution network management entity" is constructed; Based on the main grid requirements and source-load characteristics, the distribution network management entity formulates and issues the next day's planned operation curve to each balancing responsible entity; According to the deviation between the ultra-short-term power forecast carried out by the balancing responsible party within the day and the short-term power forecast carried out the day before, the planned operation curve of each balancing responsible party is corrected through the distribution network management entity; The balancing responsible entity monitors the changes in power supply and demand of each balancing settlement unit in real time, and compensates for the balancing responsible entity's balance deviation through interaction and adjustment of internal resources among the balancing responsible entities; the balance deviation refers to the deviation between the planned curve of power generation and power consumption accumulated by all users within the balancing responsible entity and the actual operation curve; Multi-level balance deviation assessment is carried out through the distribution network management entity and the balancing responsible entity, and the responsibility for balance deviation assessment is decomposed to each balancing responsible entity and each balancing settlement unit.

2. A distribution network balancing control method based on a balancing responsible subject mode according to claim 1, characterized in that: The balancing and settlement unit corresponds to the flexible resource aggregate, and is used to monitor the power data of the internal power generation and consumption resources, and provide the data to the balancing responsible entity as required, so that the deviation between the accumulated power generation and consumption plan curves of all internal users and the actual operation curves is zero; The balancing responsible entity corresponds to the distribution network grid, and the balancing responsible entity is used to manage multiple balancing settlement units in the distribution network grid; predict the power generation and consumption of the balancing settlement units and report them to the distribution network management entity; monitor the changes in power supply and demand of each balancing settlement unit within the balancing responsible entity; optimize the power generation and consumption within the balancing settlement unit to reduce the balance deviation; accept the balance deviation assessment of the distribution network management entity, and decompose the responsibility for the balance deviation assessment to the balancing settlement unit according to the contract; The distribution network management entity corresponds to the distribution / county dispatch. The distribution network management entity is used to rely on the municipal distribution automation system to aggregate grid user data and push it to the regional dispatch, and receive the regional distribution network plan operation curve formulated by the regional dispatch; based on distributed source and load data, it is responsible for the formulation, correction and issuance of the planned operation curves of each balancing responsible entity; and is responsible for the balance deviation assessment of each balancing responsible entity.

3. A distribution network balancing control method based on a balancing responsible subject mode according to claim 2, characterized in that: Based on the main grid requirements and source-load characteristics, the distribution network management entity formulates and issues the next day's planned operation curve to each balancing responsible entity, including: Collect the internal source and load resource data of the balancing settlement unit and upload it to the balancing responsible entity; The responsible entity for balancing shall predict the power generation and consumption curve of each balancing settlement unit the next day based on the historical and real-time measurement data of each balancing settlement unit, and report it to the distribution network management entity; The distribution network management entity will decompose the regional distribution network plan operation curve and issue it to each balancing responsible entity based on the next day's power generation and consumption forecast reported by each balancing responsible entity and the regional distribution network plan operation curve issued by the regional dispatch.

4. A distribution network balancing control method based on a balancing responsible subject mode according to claim 3, characterized in that: According to the deviation between the ultra-short-term power forecast carried out by the balancing responsible entity within the day and the short-term power forecast carried out the day before, the planned operation curve of each balancing responsible entity is corrected by the distribution network management entity, including: The responsible entity for balancing shall make ultra-short-term rolling power generation and consumption forecasts based on the intraday measurement data, and report the deviation between the ultra-short-term forecast and the day-ahead short-term forecast results to the distribution network management entity; The distribution network management entity modifies the planned operation curve of each balancing responsible entity based on the deviation and issues it.

5. A distribution network balancing control method based on a balancing responsible subject mode according to claim 4, characterized in that: The distribution network management entity amends and issues a planned operation curve of each balancing responsible entity based on the deviation, including: The frequency of revision and issuance is every 15 minutes, and the revised plan operation curve is: ； in, To balance the responsibility exist The planned operating power correction value at the moment, for The planned operating power of the distribution network management entity at all times, To balance the responsibility exist The short-term predicted power at the moment, To balance the responsibility exist The predicted power correction value at the time is the difference between the ultra-short-term prediction value within the day and the short-term prediction value the day before. For all balancing responsible entities The sum of the predicted power after time correction.

6. A distribution network balancing control method based on a balancing responsible subject mode according to claim 4, characterized in that: The method of monitoring the power supply and demand changes of each balancing settlement unit in real time by the balancing responsible entity and compensating the balancing deviation of the balancing responsible entity by interaction and adjustment of internal resources between the balancing responsible entities includes: The responsible entity for balancing monitors the changes in power supply and demand of each balancing settlement unit in real time. If it finds that the real-time deviation exceeds the expectations of the responsible entity at the hourly level in advance, it will report the demand for unbalanced volume trading to the distribution network management entity and reduce the balance deviation through interaction with other responsible entities for balancing. If there is an imbalance in real-time supply and demand due to load, new energy output forecast deviation, generator failure or load demand change during the real-time minute-level operation stage, the balancing responsible party will directly regulate the flexible and adjustable resources within the balancing settlement unit to reduce the balancing deviation.

7. A distribution network balancing control method based on a balancing responsible subject mode according to claim 6, characterized in that: Through the distribution network management entity and the balancing responsible entity, a multi-level balancing deviation assessment is carried out, and the balancing deviation assessment responsibility is decomposed to each balancing responsible entity and each balancing settlement unit, including: After real-time power delivery, the prefecture-level city dispatching automation system conducts a balance deviation assessment on the distribution network management entity; The distribution network management entity conducts balance deviation assessment based on the actual deviation and historical performance of each balancing responsible entity; The balancing responsible entity shall allocate the balancing deviation assessment costs to each balancing settlement unit based on the contract signed between it and the balancing settlement unit and the actual operating curve of each balancing settlement unit.

8. A distribution network balancing control method based on a balancing responsible subject mode according to claim 7, characterized in that: The municipal dispatching automation system performs a balance deviation assessment on the distribution network management subject, including: The balance deviation assessment is carried out in fifteen minutes as the minimum unit, as follows: ； in, is the balance deviation cost of the distribution network management entity, is the direction determination factor, is the unbalanced settlement unit price, is the deviation electricity in the settlement period, It is expressed as: ； in, The adjustment costs incurred by calling up the reserve adjustment capacity, In order to obtain the additional electric energy gain during negative regulation, It is the sum of the positive reserve regulation capacity and the negative reserve regulation capacity called; It is expressed as: ； in, and They are The actual power consumption curve and planned power consumption curve of the distribution network management entity at each moment.

9. A distribution network balancing control method based on a balancing responsible subject mode according to claim 7, characterized in that: The distribution network management entity conducts a balance deviation assessment based on the actual deviation and historical performance of each balance responsible entity, including: The balance deviation assessment fee is calculated as follows: ； in, To balance the balance deviation assessment costs of the responsible entity, is the profit coefficient of the distribution network management entity, >1, To balance the proportion of the imbalance of the responsible entity to all imbalances, The historical balance performance of the balancing responsible entity; the proportion of the imbalance of the balancing responsible entity to all imbalances is calculated as follows: ； in, Balancing the responsible parties The proportion of the unbalance amount to all unbalance amounts, To balance the responsibility The imbalance The amount of imbalance generated by all balancing responsible entities; The calculation is as follows: ； in, To balance the responsibility In the past The performance score in the balance deviation assessment is In the balance deviation assessment, the balance responsible party If the unbalanced amount is less than the average unbalanced amount of all balancing responsible entities, the integral is 1, otherwise it is 0. The total number of balance deviation assessments.

10. A distribution network balancing control system based on a balancing responsible subject model, characterized in that: include: The balancing and settlement unit corresponds to the flexible resource aggregate. The balancing and settlement unit is used to monitor the power data of the internal power generation and consumption resources and provide the data to the balancing responsible entity as required, so that the deviation between the accumulated power generation and consumption plan curves of all internal users and the actual operation curves is zero; The balancing responsible entity corresponds to the distribution network grid. The balancing responsible entity is used to manage multiple balancing settlement units within the distribution network grid; predict the power generation and consumption of the balancing settlement units and report it to the distribution network management entity; monitor the changes in power supply and demand of each balancing settlement unit within the balancing responsible entity; optimize the power generation and consumption within the balancing settlement unit to reduce the balance deviation; accept the balance deviation assessment of the distribution network management entity, and decompose the responsibility for the balance deviation assessment to the balancing settlement unit according to the contract; The distribution network management entity corresponds to the distribution / county dispatch. The distribution network management entity is used to rely on the municipal distribution automation system to aggregate grid user data and push it to the regional dispatch, and receive the regional distribution network plan operation curve formulated by the regional dispatch; based on distributed source and load data, it is responsible for the formulation, correction and issuance of the planned operation curves of each balancing responsible entity; and is responsible for the balance deviation assessment of each balancing responsible entity.

Images