Micro-grid dispatching control method, device, system, equipment, medium and program product

Abstract

The invention discloses a micro-grid dispatching control method, device, system, equipment and program product, which are applied to the technical field of micro-grids, and are used for solving the problem that economic and safe operation of the micro-grids can not be guaranteed, and the method is applied to any dispatching unit in the micro-grid dispatching control system. The micro-grid dispatching control system comprises an end-level dispatching unit, a micro-level dispatching unit and a clustering dispatching unit. When the dispatching unit is the end-level dispatching unit, an initial equipment power dispatching strategy and power regulation state information for power equipment are determined. The power regulation state information is sent to the micro-level scheduling unit, and the micro-level scheduling unit determines an end-level power scheduling strategy aiming at the end-level scheduling unit according to the power regulation state information in combination with power limit value data of the micro-level scheduling unit; adjusting the initial equipment power scheduling strategy based on the end-level power scheduling strategy, and performing scheduling control on the power equipment based on the adjusted equipment power scheduling strategy; and economic and safe operation of the micro-grid can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of microgrid technology, and in particular to a microgrid dispatching control method, device, system, electronic equipment, computer-readable storage medium and computer program product. Background Art

[0002] As the world's profound understanding of energy security and sustainable development continues to increase, the rapid development of new energy has become a global consensus and an irreversible trend. At present, the dispatching and control of microgrids generally only considers the grid connection points and adjustable equipment, and ensures the economic operation of microgrids by adjusting the power of photovoltaics, energy storage, and charging piles. This optimization dispatching algorithm ignores the internal line connection relationship of the microgrid and the operational safety of the transformer. As the scale of microgrid deployment increases, the electrical structure of the microgrid becomes more complex, and the current dispatching and control algorithms can no longer guarantee the economic and safe operation of microgrids.

[0003] In view of this, how to provide a dispatching control method that can better ensure the economical and safe operation of a microgrid has become a problem that needs to be solved by those skilled in the art. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a microgrid dispatching control method, device, system, computer-readable storage medium and computer program product, which can more reasonably dispatch and allocate the power of end-level power equipment during use, which is conducive to ensuring the economic and safe operation of the microgrid.

[0005] To solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

[0006] On one hand, the present invention provides a microgrid dispatching and control method, which is applied to any dispatching unit in a microgrid dispatching and control system, wherein the microgrid dispatching and control system comprises an end-level dispatching unit corresponding to each type of power equipment under each power supply branch, a micro-level dispatching unit corresponding to each power supply branch, and an aggregation-level dispatching unit corresponding to the power grid, wherein the levels of the end-level dispatching unit, the micro-level dispatching unit, and the aggregation-level dispatching unit are increased in sequence, the power grid is connected to one end of each power supply branch through each grid connection point, and the other end of each power supply branch is connected to several types of power equipment; the method comprises:

[0007] In the case where the dispatching unit is an end-level dispatching unit, determining an initial device power dispatching strategy and power regulation state information for the power device;

[0008] Sending the power regulation state information to a corresponding micro-level scheduling unit, so that the micro-level scheduling unit determines an end-level power scheduling strategy for the end-level scheduling unit according to the power regulation state information and its own power limit data;

[0009] The initial device power scheduling strategy is adjusted based on the end-level power scheduling strategy, so as to perform scheduling control on the power equipment based on the adjusted device power scheduling strategy.

[0010] In one embodiment, it further includes:

[0011] In the case where the scheduling unit is a micro-level scheduling unit, the power adjustment state information of the micro-level scheduling unit and the initial end-level power scheduling strategy for the end-level scheduling unit are determined according to the power adjustment state information sent by the end-level scheduling unit of the next level combined with the power limit data of the micro-level scheduling unit;

[0012] Sending the power regulation state information of the micro-level scheduling unit to the aggregate scheduling unit, so that the aggregate scheduling unit determines the micro-level power scheduling strategy for the micro-level scheduling unit based on the power regulation state information of the micro-level scheduling unit and the power limit data of the aggregate scheduling unit;

[0013] The initial end-level power scheduling policy is adjusted based on the micro-level power scheduling policy, and the adjusted end-level power scheduling policy is sent to the end-level scheduling unit.

[0014] In one embodiment, it further includes:

[0015] In the case where the scheduling unit is a cluster scheduling unit, a micro-level power scheduling strategy for the micro-level scheduling unit is determined according to the power regulation state information sent by the micro-level scheduling unit of the next level combined with the power limit data of the cluster scheduling unit;

[0016] The micro-level power scheduling policy is sent to the micro-level scheduling unit so that the micro-level scheduling unit adjusts the initial end-level power scheduling policy for the end-level scheduling unit based on the micro-level power scheduling policy, and sends the adjusted end-level power scheduling policy to the end-level scheduling unit.

[0017] In one embodiment, it further includes:

[0018] In the case where the scheduling unit is an end-level scheduling unit, based on the validity period carried by the end-level power scheduling policy, when it is determined that the end-level power scheduling policy is within the validity period, the step of adjusting the initial device power scheduling policy based on the end-level power scheduling policy is performed;

[0019] When it is determined that the terminal-level power scheduling strategy has exceeded the validity period, the power equipment is directly dispatched and controlled based on the initial equipment power scheduling strategy;

[0020] or, in the case where the scheduling unit is a micro-level scheduling unit, based on the validity period carried by the micro-level power scheduling policy, when it is determined that the micro-level power scheduling is within the validity period, the step of adjusting the initial end-level power scheduling policy based on the micro-level power scheduling policy and sending the adjusted end-level power scheduling policy to the end-level scheduling unit is performed;

[0021] When it is determined that the micro-level scheduling strategy exceeds the validity period, the initial end-level power scheduling strategy is directly sent to the end-level scheduling unit.

[0022] In one implementation, the power regulation status information includes one or more of the current power, expected power, maximum active power, minimum active power, upward power change rate, and downward power change rate of the scheduling unit.

[0023] In one embodiment, the terminal-level scheduling unit includes an energy storage scheduling unit corresponding to the energy storage device, a photovoltaic scheduling unit corresponding to the photovoltaic device, and a charging pile scheduling unit corresponding to the charging pile.

[0024] In one embodiment, when the dispatching unit is an end-level dispatching unit; the maximum active power is the sum of the maximum active powers of each power device, the minimum active power is the sum of the minimum active powers of each power device; the upward power change rate is the sum of the upward power change rates of each power device; the downward power change rate is the sum of the downward power change rates of each power device;

[0025] In the case where the dispatching unit is a micro-level dispatching unit, the maximum active power is the sum of the maximum active powers of each adjustable end-level dispatching unit located at the next level of the micro-level dispatching unit and the minimum value of the upper power limit of the micro-level dispatching unit; the minimum active power is the sum of the minimum active powers of each adjustable end-level dispatching unit located at the next level of the micro-level dispatching unit and the maximum value of the lower power limit of the micro-level dispatching unit; the upward power change rate is the sum of the upward power change rates of each adjustable end-level dispatching unit located at the next level of the micro-level dispatching unit; the downward power change rate is the sum of the downward power change rates of the upward power change rates.

[0026] In one embodiment, when the dispatching unit is an energy storage dispatching unit and the power equipment is an energy storage equipment, the maximum active power of the energy storage equipment is the minimum value among the BMS maximum charging power, the PCS rated power and the upper limit of its own power; the minimum active power of the energy storage equipment is the maximum value among the negative BMS maximum charging power, the negative PCS rated power and the lower limit of its own power; the upward power change rate of the energy storage equipment is the difference between the maximum active power and the current power; the downward power change rate of the energy storage equipment is the minimum value among the maximum active power change compensation and the difference between the current power and the minimum charging power;

[0027] In the case where the dispatching unit is a photovoltaic dispatching unit and the power equipment is a photovoltaic equipment, the maximum active power of the photovoltaic equipment is zero; the minimum active power of the photovoltaic equipment is the maximum value of the difference between the current power and the preset adjustable power value and the negative value of the rated power of the photovoltaic inverter; the upward power change rate of the photovoltaic equipment is the negative value of the current power generation power; the downward power change rate of the photovoltaic equipment is the minimum value of the maximum active power change step and the difference between the current power and the minimum active power;

[0028] When the dispatching unit is a charging pile dispatching unit and the power equipment is a charging pile, the maximum active power of the charging pile is the minimum value of the current demand power and the maximum active power of the charging gun; the minimum active power of the charging pile is determined based on the type of charging pile; the upward power change rate of the charging pile is the difference between the maximum charging power and the current power; the downward power change rate of the charging pile is the minimum value of the maximum active power change step and the difference between the current power and the minimum charging power.

[0029] On the other hand, an embodiment of the present invention provides a microgrid dispatching control device, which is applied to any dispatching unit in a microgrid dispatching control system, wherein the microgrid dispatching control system includes an end-level dispatching unit corresponding to each type of power equipment under each power supply branch, a micro-level dispatching unit corresponding to each power supply branch, and an aggregation-level dispatching unit corresponding to the power grid, wherein the levels of the end-level dispatching unit, the micro-level dispatching unit, and the aggregation-level dispatching unit are increased in sequence, the power grid is connected to one end of each power supply branch through each grid connection point, and the other end of each power supply branch is connected to several types of power equipment; the device includes:

[0030] A first determination module, configured to determine an initial device power scheduling strategy and power regulation state information for the power device when the scheduling unit is an end-level scheduling unit;

[0031] A first sending module, configured to send the power regulation state information to a corresponding micro-level scheduling unit, so that the micro-level scheduling unit determines an end-level power scheduling strategy for the end-level scheduling unit according to the power regulation state information and its own power limit data;

[0032] The first adjustment module is used to adjust the initial device power scheduling strategy based on the terminal-level power scheduling strategy, so as to perform scheduling control on the power equipment based on the adjusted device power scheduling strategy.

[0033] Another aspect of the embodiment of the present invention provides a microgrid dispatching and control system, comprising: an end-level dispatching unit corresponding to each type of power equipment under each power supply branch, a micro-level dispatching unit corresponding to each of the power supply branches, and an aggregate-level dispatching unit corresponding to the power grid, wherein the levels of the end-level dispatching unit, the micro-level dispatching unit, and the aggregate-level dispatching unit are increased in sequence, the power grid is connected to one end of each power supply branch through each grid connection point, and the other end of each of the power supply branches is connected to several types of power equipment; wherein any dispatching unit includes a memory and a processor;

[0034] The memory is used to store computer programs;

[0035] The processor is used to implement the steps of the microgrid dispatching control method as described above when executing the computer program.

[0036] Another aspect of the present invention provides an electronic device, including:

[0037] Memory for storing computer programs;

[0038] A processor is used to execute the computer program to implement the steps of the microgrid dispatching control method as described above.

[0039] Another aspect of an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the microgrid dispatching control method as described above are implemented.

[0040] Another aspect of an embodiment of the present invention provides a computer program product, including a computer program / instruction, which implements the steps of the above-mentioned microgrid dispatching control method when executed by a processor.

[0041] It can be seen from the above technical solutions that the embodiments of the present invention have the following advantages:

[0042] A microgrid dispatching and control method is provided in an embodiment of the present invention, which is applied to any dispatching unit in a microgrid dispatching and control system. The microgrid dispatching and control system includes an end-level dispatching unit corresponding to each type of power equipment under each power supply branch, a micro-level dispatching unit corresponding to each power supply branch, and an aggregation-level dispatching unit corresponding to the power grid, wherein the levels of the end-level dispatching unit, the micro-level dispatching unit, and the aggregation-level dispatching unit are increased in sequence, the power grid is connected to one end of each power supply branch through each grid connection point, and the other end of each power supply branch is connected to several types of power equipment; the method includes: when the dispatching unit is an end-level dispatching unit, determining an initial device power dispatching strategy and power regulation status information for the power equipment; sending the power regulation status information to the corresponding micro-level dispatching unit, so that the micro-level dispatching unit determines the end-level power dispatching strategy for the end-level dispatching unit according to the power regulation status information combined with its own power limit data; adjusting the initial device power dispatching strategy based on the end-level power dispatching strategy, so as to dispatch and control the power equipment based on the adjusted device power dispatching strategy.

[0043] It can be seen that in the embodiment of the present invention, the dispatching units at various levels are determined in combination with the power supply branches and grid connection points in the microgrid, and the three-level dispatching of the microgrid is formed by the end-level dispatching unit, the micro-level dispatching unit and the aggregation-level dispatching unit. The end-level dispatching unit can formulate an initial equipment power dispatching strategy for the corresponding power equipment, and send the power regulation status information of the end-level dispatching unit to the micro-level dispatching unit at the upper level. The micro-level dispatching unit will generate an end-level power dispatching strategy for the end-level dispatching unit according to its own power limit data and the power regulation status information sent by the end-level dispatching unit. The end-level dispatching unit will make corresponding adjustments to the formulated initial equipment power dispatching strategy according to the end-level power dispatching strategy returned by the micro-level dispatching unit at the upper level, and use the adjusted equipment power dispatching strategy to dispatch and control the power of the corresponding power equipment, so as to realize the reasonable power distribution of each power equipment under the end-level dispatching unit. In this application, when performing microgrid dispatching, the three-level dispatching unit is determined in combination with the grid connection point and each power supply branch, so that the power of the end-level power equipment can be more reasonably dispatched and allocated, which is conducive to ensuring the economic and safe operation of the microgrid.

[0044] In addition, the present invention also provides corresponding implementation devices, systems, electronic devices, computer-readable storage media and computer program products for the microgrid dispatching control method, which further makes the method more practical, and the devices, systems, electronic devices, computer-readable storage media and computer program products have corresponding advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the prior art and the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 A schematic diagram of a flow chart of a microgrid dispatching control method provided by an embodiment of the present invention;

[0047] Figure 2 An architecture diagram of a microgrid dispatching and control system provided by an embodiment of the present invention;

[0048] Figure 3 An architecture diagram of another microgrid dispatching and control system provided by an embodiment of the present invention;

[0049] Figure 4 An architecture diagram of another microgrid dispatching and control system provided by an embodiment of the present invention;

[0050] Figure 5 An architecture diagram of information interaction between scheduling units at various levels provided in an embodiment of the present invention;

[0051] Figure 6 A structural relationship diagram of a micro-level scheduling unit and a lower-level scheduling unit provided in an embodiment of the present invention;

[0052] Figure 7 A schematic diagram of the structure of a single grid-connected point scheduling unit provided by an embodiment of the present invention;

[0053] Figure 8 A schematic diagram of the structure of a multi-grid point scheduling unit provided by an embodiment of the present invention;

[0054] Fig. 9 A schematic diagram of the structure of a DC mutual assistance dispatching unit provided in an embodiment of the present invention;

[0055] Fig.10 A schematic diagram of the structure of a microgrid dispatching control device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] The embodiments of the present invention provide a microgrid dispatching and control method, device, system, electronic device, computer-readable storage medium and computer program product, which can more reasonably dispatch and allocate the power of end-level power equipment during use, which is conducive to ensuring the economic and safe operation of the microgrid.

[0057] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] Please refer to Figure 1 , Figure 1 A flow chart of a microgrid dispatching and control method provided by an embodiment of the present invention. The microgrid dispatching and control method is applied to any dispatching unit in a microgrid dispatching and control system, which includes an end-level dispatching unit corresponding to each type of power equipment under each power supply branch, a micro-level dispatching unit corresponding to each power supply branch, and an aggregation-level dispatching unit corresponding to the power grid, wherein the levels of the end-level dispatching unit, the micro-level dispatching unit, and the aggregation-level dispatching unit increase in sequence, the power grid is connected to one end of each power supply branch through each grid connection point, and the other end of each power supply branch is connected to several types of power equipment.

[0059] It should be noted that in the embodiment of the present invention, for a microgrid area, in order to better realize the power dispatch management of each power device at the end and ensure the microgrid to operate more economically and safely, corresponding end-level dispatch units can be constructed for each type of power device at the end located under the same power supply branch according to the location of the grid connection point in the microgrid and the location of each power supply branch, corresponding micro-level dispatch units can be constructed for each end-level dispatch unit with the same power supply branch, and each micro-level dispatch unit is connected to the grid through the grid connection point, so a corresponding cluster-level dispatch unit is constructed for each micro-level dispatch unit. Figure 2The 10kV microgrid shown in the figure is taken as an example for explanation. For example, the power equipment at the end are energy storage equipment, photovoltaic equipment and charging piles. For power supply branch ①, since the 10kV distribution transformer side needs to consider the transformer capacity limit, it is necessary to construct a 1-1 charging dispatching unit on the distribution transformer side; for various power equipment at the lower level of power supply branch ②, corresponding end-level dispatching units can be constructed respectively, such as a 1-2-1 photovoltaic dispatching unit for photovoltaic equipment, a 1-2-2 energy storage dispatching unit for energy storage equipment, and a 1-2-3 charging dispatching unit for charging piles. Since the 10kV distribution transformer side needs to consider the transformer capacity limit, it is necessary to establish a micro-level dispatching unit on the distribution transformer side (that is, at power supply branch ①), such as a 1-2 single grid-connected point dispatching unit. Similarly, for various types of power equipment at the lower level of power supply branch ③, corresponding end-level dispatching units can be constructed respectively, such as 1-3-1 photovoltaic dispatching unit for photovoltaic equipment, 1-3-2 energy storage dispatching unit for energy storage equipment, and 1-3-3 charging dispatching unit for charging piles. Since the transformer capacity limit needs to be considered on the 10kV distribution transformer side, it is necessary to construct a micro-level dispatching unit on the distribution transformer side (that is, at the power supply branch ②), such as 1-3 single grid-connected point dispatching unit. That is, for the grid-connected point, on the one hand, it is necessary to consider the grid-connected constraints of the power grid (such as the need to prevent backflow), and on the other hand, it is also necessary to participate in the virtual power plant. Therefore, a single grid-connected dispatching unit 1 (including dispatching units 1-1, 1-2, and 1-3) is set up, and interconnection with the virtual power plant is achieved. Since the 1-1 charging dispatching unit, the 1-2 single grid-connected point dispatching unit, and the 1-3 single grid-connected point dispatching unit are all connected to the power plant power grid through the corresponding grid-connected points a, b, and c, the corresponding aggregation-level dispatching unit (that is, Figure 2 The aggregation dispatch unit 1 in the figure). Finally, the construction of the microgrid dispatch hierarchical model is completed.

[0060] In addition, if Figure 3 and Figure 4 As shown, for each dispatch unit, different dispatch strategies can be formulated according to business needs. For example, energy storage dispatch units 1-2-2, 1-3-2 and electric vehicle dispatch units 1-2-3, 1-3-3 can set corresponding economic plan operation curves (i.e., plan curves). The purpose of the economic plan operation curves is to maximize their own benefits. To ensure the operation of distribution transformers, dispatch units 1-1, 1-2, and 1-3 can set power limit data (e.g., power limit constraint curves, i.e., limit curves). Of course, the grid connection point also needs to set the corresponding power limit constraint curve and receive the dispatch plan of the virtual power plant.

[0061] Based on the microgrid dispatching hierarchical module constructed above, the method may include:

[0062] S110: When the dispatching unit is an end-level dispatching unit, determine an initial device power dispatching strategy and power regulation state information for the power device;

[0063] It should be noted that in the embodiment of the present invention, when the dispatching unit is an end-level dispatching unit, the end-level dispatching unit is directly used to regulate each power equipment at the end. Therefore, corresponding economic plan operation curves (that is, data on the relationship between power and time) can be formulated in advance for different power equipment. The goal of the economic plan operation curve is to maximize its own benefits. The end-level dispatching unit can determine the initial equipment power dispatching strategy (that is, the initial equipment power plan curve) and its own power regulation status information based on the economic plan operation curve. The initial equipment power dispatching strategy may include information on the change of initial power over time, and the power regulation status information may include one or more of the current power, expected power, maximum active power, minimum active power, upward power change rate and downward power change rate of the end-level dispatching unit.

[0064] S120: Send the power regulation state information to the corresponding micro-level scheduling unit, so that the micro-level scheduling unit determines the end-level power scheduling strategy for the end-level scheduling unit according to the power regulation state information and its own power limit data;

[0065] After the end-level scheduling unit obtains its own power regulation state information, it can send the power regulation state information to the corresponding upper-level micro-scheduling unit. The micro-scheduling unit can generate an end-level power scheduling strategy for the end-level scheduling unit based on its own power limit data and the received power regulation state information. The lower level of a micro-scheduling unit may correspond to multiple end-level scheduling units, for example Figure 2 The single grid-connected point dispatching unit 1-2 corresponds to the photovoltaic dispatching unit 1-2-1, the energy storage dispatching unit 1-2-2 and the charging dispatching unit 1-2-3. Therefore, a micro-level dispatching unit needs to determine the end-level power dispatching strategy corresponding to each end-level dispatching unit according to the power regulation status information sent by at least one end-level dispatching unit, so that the sum of each power value at each moment in each end-level power dispatching strategy will not exceed the power limit of the micro-level dispatching unit. If the sum of the expected powers in the power regulation status information corresponding to each end-level dispatching unit is greater than the power limit of the micro-level dispatching unit, the power value in the end-level power dispatching strategy generated by the micro-level dispatching unit will be lower than the corresponding expected power, thereby ensuring the safe and stable operation of the transformer on the micro-level dispatching unit side.

[0066] In addition, it should be noted that in actual applications, since the micro-level scheduling unit also has an upper-level cluster-level scheduling unit, the micro-level scheduling unit can first determine an initial end-level power scheduling strategy and power regulation status information based on the received power regulation status information and its own power limit data, and then send the power regulation status information to the upper-level cluster-level scheduling unit of the micro-level scheduling unit. The cluster-level scheduling unit further determines the micro-level power scheduling strategy for the micro-level scheduling unit based on the power regulation status information of the micro-level scheduling unit and the power limit data of the cluster-level scheduling unit, and returns the micro-level power scheduling strategy to the micro-level scheduling unit. The micro-level scheduling unit adjusts the initial end-level power scheduling strategy according to the micro-level power scheduling strategy to obtain the corresponding end-level power scheduling strategy, and sends the end-level power scheduling strategy to the corresponding end-level scheduling unit.

[0067] S130: adjusting the initial device power scheduling strategy based on the terminal-level power scheduling strategy, so as to perform scheduling control on the power equipment based on the adjusted device power scheduling strategy.

[0068] Specifically, after the end-level scheduling unit receives the end-level power scheduling strategy returned by the micro-level scheduling unit, it can adjust the established initial equipment power scheduling strategy according to the end-level power scheduling strategy, and then perform power scheduling and control on the corresponding power equipment according to the adjusted equipment power scheduling strategy, so as to better ensure the economic and safe operation of the microgrid.

[0069] In one embodiment, the method further comprises:

[0070] In the case where the scheduling unit is a micro-level scheduling unit, the power adjustment state information of the micro-level scheduling unit and the initial end-level power scheduling strategy for the end-level scheduling unit are determined according to the power adjustment state information sent by the end-level scheduling unit of the next level combined with the power limit data of the micro-level scheduling unit;

[0071] Sending the power regulation state information of the micro-level scheduling unit to the aggregate-level scheduling unit, so that the aggregate-level scheduling unit determines the micro-level power scheduling strategy for the micro-level scheduling unit based on the power regulation state information of the micro-level scheduling unit and the power limit data of the aggregate-level scheduling unit;

[0072] The initial end-level power scheduling policy is adjusted based on the micro-level power scheduling policy, and the adjusted end-level power scheduling policy is sent to the end-level scheduling unit.

[0073] It should be noted that, in the embodiment of the present invention, when the scheduling unit is a micro-level scheduling unit, the micro-level scheduling unit can be used to regulate the scheduling strategies formulated by the various end-level scheduling units below it. Specifically, the end-level scheduling unit will send the obtained power regulation status information to the micro-level scheduling unit at its upper level to apply for the expected allocated power quota. The micro-level scheduling unit receives the power regulation status information sent by each end-level scheduling unit respectively, and comprehensively analyzes the power regulation status information of each end-level scheduling unit and the power limit data of the micro-level scheduling unit to determine whether the sum of the expected powers of each end-level scheduling unit exceeds the power limit of the micro-level scheduling unit. If the power limit is exceeded, the corresponding power will be allocated to each end-level scheduling unit according to the total power limit of the micro-level scheduling unit, so that the sum of the allocated powers does not exceed the total power limit of the micro-level scheduling unit, thereby obtaining the initial end-level power scheduling strategy for each end-level scheduling unit. For example, the next level of the end-level dispatching units of the single grid-connected point dispatching unit 1-2 (micro-level dispatching unit) are the photovoltaic dispatching unit 1-2-1, the energy storage dispatching unit 1-2-2 and the charging dispatching unit 1-2-3. If the expected power of the photovoltaic dispatching unit 1-2-1 is 100, the expected power of the energy storage dispatching unit 1-2-2 is 50 and the expected power of the charging dispatching unit 1-2-3 is 50, but the maximum power limit of the single grid-connected point dispatching unit 1-2 is 160, which is less than the total expected power of 200 applied by the three end-level dispatching units, then the single grid-connected point dispatching unit can be used. The maximum power limit of 1-2 is combined with the ratio of the expected power applied by each end-level scheduling unit to determine the initial end-level power scheduling strategy corresponding to each end-level scheduling unit. For example, the allocated power in the initial end-level power scheduling strategy corresponding to the photovoltaic scheduling unit 1-2-1 can be 80, the allocated power in the initial end-level power scheduling strategy corresponding to the energy storage scheduling unit 1-2-2 can be 40, and the allocated power in the initial end-level power scheduling strategy corresponding to the charging scheduling unit 1-2-3 can be 40, thereby determining the initial end-level power scheduling strategy corresponding to each end-level scheduling unit. In addition, when the micro-level scheduling unit specifies the initial end-level power scheduling strategy corresponding to each end-level scheduling unit, it also formulates the initial end-level power scheduling strategy under the condition of ensuring economic maximization.

[0074] In addition, for the micro-level dispatching unit, after it has formulated the initial end-level power dispatching strategy corresponding to each end-level dispatching unit, it is necessary to further report to the aggregation-level dispatching unit at the upper level, so that the aggregation-level dispatching unit at the upper level can formulate a strategy for each micro-level dispatching unit according to the overall power limit, so as to ensure the economic and safe operation of the entire microgrid. Specifically, after determining the initial end-level power scheduling strategy corresponding to each end-level scheduling unit, the micro-level scheduling unit can further determine the power regulation status information of the micro-level scheduling unit itself (including current power, expected power, maximum active power, minimum active power, upward power change rate and downward power change rate), and send the power regulation status information of the micro-level scheduling unit to the cluster-level scheduling unit, so that the cluster-level scheduling unit can determine the micro-level power scheduling strategy for the micro-level scheduling unit based on the power regulation status information of the micro-level scheduling unit combined with the power limit data of the cluster-level scheduling unit. The micro-level scheduling unit can further adjust the formulated initial end-level power scheduling strategy according to the micro-level power scheduling strategy, and then send the adjusted end-level power scheduling strategy to the end-level scheduling unit, so that the end-level scheduling unit can adjust the initial equipment power scheduling strategy for the power equipment according to the received end-level power scheduling strategy, and perform power scheduling control on the power equipment according to the adjusted equipment power scheduling strategy to ensure the economical and safe operation of the power equipment.

[0075] In one embodiment, the method further comprises:

[0076] In the case where the scheduling unit is a cluster-level scheduling unit, a micro-level power scheduling strategy for the micro-level scheduling unit is determined according to the power regulation state information sent by the micro-level scheduling unit at the next level combined with the power limit data of the cluster-level scheduling unit;

[0077] The micro-level power scheduling policy is sent to the micro-level scheduling unit so that the micro-level scheduling unit adjusts the initial end-level power scheduling policy for the end-level scheduling unit based on the micro-level power scheduling policy, and sends the adjusted end-level power scheduling policy to the end-level scheduling unit.

[0078] It should be noted that, in the embodiment of the present invention, when the scheduling unit is a cluster-level scheduling unit, the cluster-level scheduling unit can be used to regulate the scheduling strategies formulated by the various micro-level scheduling units under it. Specifically, the various micro-level scheduling units under the cluster-level scheduling unit send their respective power regulation state information to the cluster-level scheduling unit. The cluster-level scheduling unit determines whether the sum of the expected powers in the various power regulation state information exceeds the power limit of the cluster-level scheduling unit based on the confidence of each power regulation state and its own power limit data. If the power limit is not exceeded, the cluster-level scheduling unit can still meet the requirements of each micro-level scheduling unit while ensuring its own maximum economic benefits. When applying for expected power, a micro-level power dispatching strategy can be formulated for each micro-level dispatching unit, and the power situation in the micro-level power dispatching strategy meets the corresponding power expectation; if the sum of the expected powers in the power regulation state information of each power regulation state exceeds the power limit of the aggregate-level dispatching unit, and the aggregate-level dispatching unit cannot meet the expected power applied for by each micro-level dispatching unit while ensuring its own maximum economic benefit, the power limit data of the aggregate-level dispatching unit can be used to execute the corresponding micro-level power dispatching strategy for each micro-level dispatching unit, and the power situation in the micro-level power dispatching strategy should be lower than the corresponding power expectation, so as to better ensure the economic and safe operation of the entire microgrid.

[0079] That is, the embodiment of the present invention proposes a three-level scheduling of end-micro-aggregate, and realizes the aggregate management and group adjustment and control of the same type of regulation resources through the end-level scheduling unit; through the nested association of the micro-level scheduling unit, the connection relationship of the microgrid is simply and clearly described, and the limit constraints are supported to be set at any position. Under the limit constraints, the power allocation of the end-level scheduling unit is realized; the discrete microgrid regulation capabilities are aggregated and managed through the aggregate scheduling unit to provide support for participating in the virtual power plant.

[0080] In one embodiment, the method further comprises:

[0081] In the case where the scheduling unit is an end-level scheduling unit, based on the validity period carried by the end-level power scheduling policy, when it is determined that the end-level power scheduling policy is within the validity period, a step of adjusting the initial device power scheduling policy based on the end-level power scheduling policy is performed;

[0082] When it is determined that the terminal-level power dispatching strategy has exceeded the validity period, the power equipment is dispatched and controlled directly based on the initial equipment power dispatching strategy;

[0083] Or, in the case where the scheduling unit is a micro-level scheduling unit, based on the validity period carried by the micro-level power scheduling policy, when it is determined that the micro-level power scheduling is within the validity period, the step of adjusting the initial end-level power scheduling policy based on the micro-level power scheduling policy and sending the adjusted end-level power scheduling policy to the end-level scheduling unit is performed;

[0084] When it is determined that the micro-level scheduling strategy exceeds the validity period, the initial end-level power scheduling strategy is directly sent to the end-level scheduling unit.

[0085] It should be noted that in the embodiment of the present invention, from the end-level scheduling unit to the micro-level scheduling unit and then to the cluster-level scheduling unit, after completing the formulation of the initial power scheduling strategy, the scheduling unit at the next level will report the formulated initial power scheduling strategy to the upper-level scheduling unit for adjustment capability (that is, power adjustment status information, which may include current power, expected power, maximum active power, minimum active power, upward power change rate and downward power change rate). Through bottom-up reporting, the highest-level cluster-level scheduling unit will send the formulated power scheduling strategy to the micro-level scheduling unit at the next level in the form of an adjustment instruction to adjust the initial power scheduling strategy formulated by the micro-level scheduling unit, and send the adjusted power scheduling strategy to the end-level scheduling unit at the next level in the form of a scheduling instruction, thereby realizing the adjustment of the scheduling measurement formulated by the end-level scheduling unit and realizing power scheduling control of various power equipment at the end, thereby realizing closed-loop scheduling control of the microgrid.

[0086] It should also be pointed out that the scheduling strategies of each scheduling unit can include two types, one is the autonomous operation strategy (that is, the scheduling strategy formulated by itself), and the other is the superior scheduling strategy (that is, the scheduling strategy formulated and sent by the upper level).

[0087] Autonomous operation strategies generally vary according to the nature of the power equipment within the dispatch unit or the revenue target. For example, photovoltaic equipment generates electricity at the maximum power calculated by MPPT (Maximum Power Point Tracking), charging piles charge according to the power demand of electric vehicles, energy storage charges and discharges according to the economic planning curve, and microgrids are connected to the grid to maximize revenue, etc. Based on the autonomous operation strategy, the dispatch unit can generate autonomous dispatch instructions. In practical applications, in order to ensure that various types of power equipment can be regulated and controlled in a timely manner, a validity period (such as effective duration) can be set for the superior dispatching instruction. That is, when the superior level sends the dispatching instruction corresponding to the dispatching strategy to the next-level dispatching unit, the validity period and strategy generation time carried by the dispatching strategy are sent to the next-level dispatching unit at the same time. After receiving the dispatching strategy or the corresponding dispatching instruction, the next-level dispatching unit further identifies whether the dispatching strategy has exceeded the corresponding validity period based on the strategy generation time. If it is within the validity period, the superior dispatching instruction has a higher priority than the autonomous dispatching instruction. That is, the dispatching unit adjusts its own dispatching strategy according to the dispatching strategy returned by the superior level and sends it to the next-level dispatching unit, or directly performs power dispatching control on the power equipment; if it is determined that the dispatching strategy has exceeded the corresponding validity period, the superior dispatching instruction is invalid (that is, the dispatching strategy returned by the superior level is invalid), and the dispatching unit can send it to the next-level dispatching unit according to its own dispatching strategy (in the case of a next-level dispatching unit), or perform power dispatching control on the power equipment according to its own dispatching strategy.

[0088] Also, please refer to Figure 5 The architecture diagram of information interaction between dispatch units at all levels is shown. Each dispatch unit sets the maximum power limit and the minimum power limit according to its own safety constraints to avoid abnormal operation of the dispatch unit. For example, the minimum power limit of a dispatch unit with anti-backflow requirements is 0; the maximum power of a dispatch unit with demand control requirements shall not exceed the demand limit. The maximum power limit and the minimum power limit in the embodiment of the present invention can be fixed values ​​or time-varying limit curves.

[0089] The dispatch unit should support the collection of operating data (operating power, maximum active power, minimum active power, upward power change rate, downward power change rate, etc.) of the lower-level dispatch unit, estimate its own operating data and formulate corresponding dispatch strategies based on the operating data of the lower-level dispatch unit, and upload them to the upper-level dispatch unit. Among them, the maximum active power in the embodiment of the present invention refers to the maximum operable power of the dispatch unit, the minimum active power refers to the maximum operable power of the dispatch unit, the upward power change rate refers to the allowable increase in the operating power of the dispatch unit within the unit dispatch cycle, and the downward power change rate refers to the allowable decrease in the operating power of the dispatch unit within the unit dispatch cycle, wherein the maximum active power and the minimum active power should be within the power limit safety constraints of the dispatch unit itself.

[0090] After receiving the dispatch instruction corresponding to the dispatch strategy returned by the dispatch unit at the previous level, the dispatch unit at the next level can decompose the dispatch instruction to the dispatch unit at the next level or the power equipment at the next level according to certain decomposition rules. There are many types of decomposition rules, and they can be adjusted according to business needs. For example, the decomposition rules of the scene may include: decomposition by SOC (States of Charge), decomposition by power, decomposition by priority, etc. The specific selection can be based on actual needs, and the embodiment of the present invention does not make special restrictions on this. It should be noted that the instruction decomposition should be within the maximum active power and minimum active power uploaded by the dispatch unit at the next level.

[0091] The following is a detailed introduction to the operation data of the scheduling units at all levels in the embodiment of the present invention:

[0092] In one embodiment, the terminal-level scheduling unit includes an energy storage scheduling unit corresponding to the energy storage device, a photovoltaic scheduling unit corresponding to the photovoltaic device, and a charging pile scheduling unit corresponding to the charging pile.

[0093] It should be noted that the type of end-level dispatching unit is flexible. It can be a collection of one or more power equipment of the same type, or a collection of all different types of power equipment under a household number or a substation, or even a collection of all power equipment under a certain regulation subject in a certain province. In the embodiment of the present invention, a corresponding end-level dispatching unit can be pre-set for the same type of power equipment under the same power supply branch in the microgrid area. For example, the types of power equipment may include energy storage equipment, photovoltaic equipment, and charging piles. The corresponding end-level dispatching unit may include an energy storage dispatching unit corresponding to the energy storage equipment, a photovoltaic dispatching unit corresponding to the photovoltaic equipment, and a charging pile dispatching unit corresponding to the charging pile.

[0094] In one embodiment, when the dispatching unit is an end-level dispatching unit, the maximum active power is the sum of the maximum active powers of each power device, and the minimum active power is the sum of the minimum active powers of each power device; the upward power change rate is the sum of the upward power change rates of each power device; and the downward power change rate is the sum of the downward power change rates of each power device. When the dispatching unit is a micro-level dispatching unit, the maximum active power is the sum of the maximum active powers of each adjustable end-level dispatching unit located at the next level of the micro-level dispatching unit and the minimum value of the upper power limit of the micro-level dispatching unit; the minimum active power is the sum of the minimum active powers of each adjustable end-level dispatching unit located at the next level of the micro-level dispatching unit and the maximum value of the lower power limit of the micro-level dispatching unit; the upward power change rate is the sum of the upward power change rates of each adjustable end-level dispatching unit located at the next level of the micro-level dispatching unit; and the downward power change rate is the sum of the downward power change rates of the upward power change rates.

[0095] In one embodiment, when the dispatching unit is an energy storage dispatching unit and the power equipment is an energy storage equipment, the maximum active power of the energy storage equipment is the minimum value among the maximum charging power of the BMS (battery management system), the rated power of the PCS (Power Conversion System) and the upper limit of its own power; the minimum active power of the energy storage equipment is the maximum value among the negative maximum charging power of the BMS, the negative rated power of the PCS and the lower limit of its own power; the upward power change rate of the energy storage equipment is the difference between the maximum active power and the current power; the downward power change rate of the energy storage equipment is the minimum value among the maximum active power change compensation and the difference between the current power and the minimum charging power;

[0096] When the dispatching unit is a photovoltaic dispatching unit and the power equipment is a photovoltaic equipment, the maximum active power of the photovoltaic equipment is zero; the minimum active power of the photovoltaic equipment is the maximum value of the difference between the current power and the preset adjustable power value and the negative value of the rated power of the photovoltaic inverter; the upward power change rate of the photovoltaic equipment is the negative value of the current power generation power; the downward power change rate of the photovoltaic equipment is the minimum value of the maximum active power change step and the difference between the current power and the minimum active power;

[0097] When the dispatching unit is a charging pile dispatching unit and the power equipment is a charging pile, the maximum active power of the charging pile is the minimum of the current demand power and the maximum active power of the charging gun; the minimum active power of the charging pile is determined based on the type of charging pile; the upward power change rate of the charging pile is the difference between the maximum charging power and the current power; the downward power change rate of the charging pile is the minimum of the maximum active power change step and the difference between the current power and the minimum charging power.

[0098] It should be noted that the energy storage scheduling unit refers to a collection of one or more energy storage devices (or energy storage systems, such as energy storage batteries + BMS + PCS + energy storage incoming line meters). The energy storage unit supports data collection of energy storage devices and evaluates their maximum active power and minimum active power based on the energy storage SOC.

[0099] For an energy storage device (or energy storage system), since the BMS generally directly provides the maximum charging and discharging power, the maximum active power and minimum active power of the energy storage device are:

[0100] Maximum active power = min (BMS maximum charging power, PCS rated power, own power limit);

[0101] Minimum active power = max (-1*BMS maximum charging power, -1*PCS rated power, own power lower limit).

[0102] When energy storage increases power, the rate of increase in power in each regulation cycle is:

[0103] The power change rate of upward adjustment = maximum active power - current power;

[0104] When energy storage reduces power, the power reduction rate in each regulation cycle is:

[0105] The power change rate is adjusted downward = min (maximum power change step, current power - minimum charging power).

[0106] For the dispatching units corresponding to multiple energy storages, their maximum active power, minimum active power, upward power change rate, and adjustable power change rate are all the sum of each energy storage.

[0107] The energy storage dispatching unit can support the manually defined energy storage economic planning curve issued by the cloud. When there is no superior dispatching instruction, the corresponding dispatching strategy can be formulated and executed according to the energy storage economic planning curve. When there is a superior dispatching instruction, if the superior dispatching instruction is within the validity period, the final power dispatching strategy is determined according to the superior dispatching instruction, and the power dispatching control of the corresponding energy storage equipment is performed. The upper and lower power limits of the energy storage dispatching unit can be pre-configured according to actual needs, or the power limit curve issued by the cloud can be received, and the power is guaranteed to be within the limit constraint range according to the power limit curve. In principle, multi-energy storage performs power control according to the current SOC convergence, that is, the charging power is small when the SOC is high during charging, and the discharge power is small when the SOC is low during discharging. When a power equipment failure or offline is detected, it is determined that the power equipment is uncontrollable.

[0108] In addition, in practical applications, the energy storage dispatching unit can also have the following functions:

[0109] When the energy storage scheduling unit detects abnormal conditions such as the voltage of a single energy storage device being too high or too low, the temperature being too high or too low, or the energy storage SOC being too high or too low, it can actively reduce the energy storage charging and discharging power of the corresponding energy storage device or even control the energy storage device to stop the energy storage operation, thereby improving the safety of the energy storage device. The energy storage scheduling unit can also collect data from environmental control, fire protection, air conditioning, fans and other systems connected to the energy storage cabinet; it can also generate event alarms based on energy storage abnormal signals and notify operation and maintenance personnel through DingTalk, email and other methods. The energy storage scheduling unit in the embodiment of the present invention can also define the energy storage time-sharing charging and discharging electricity price based on the energy storage time-sharing charging and discharging electricity price input by the staff, calculate the energy storage time-sharing charging and discharging power based on the time-sharing electricity price, and calculate its total income and per-kilowatt-hour income, and can also calculate the energy storage loss and energy efficiency by monthly statistics of the total charging and discharging power of the energy storage.

[0110] The photovoltaic dispatching unit is introduced below. The photovoltaic dispatching unit refers to a collection of one or a group of photovoltaic devices or photovoltaic systems (photovoltaic panels + photovoltaic inverters + photovoltaic incoming electricity meters). The photovoltaic dispatching unit in the embodiment of the present invention can collect data from photovoltaic inverters and electricity meters, and evaluate the corresponding maximum active power and minimum active power (negative power) according to the current situation of the photovoltaic equipment. For a single photovoltaic device, its minimum active power and maximum active power are:

[0111] Minimum active power = max (current power - △P, -1*rated power of PV inverter); where △P is the estimated additional power space (i.e. the preset adjustable power value mentioned above).

[0112] Maximum active power = 0.

[0113] When the photovoltaic power generation is reduced (negative power generation), the rate of increase in power change in each regulation cycle is:

[0114] Increase power change rate = -1*current power generation;

[0115] When the photovoltaic power generation increases (positive generation), the rate of change of the downward power in each regulation cycle is:

[0116] The power change rate of downward adjustment = min (maximum power change step, current power - minimum active power).

[0117] When a photovoltaic dispatching unit corresponds to multiple photovoltaic devices, the maximum active power, minimum active power, upward power change rate, and downward power change rate of the photovoltaic dispatching unit are all the sum of the parameters corresponding to each photovoltaic device.

[0118] In practical applications, the power generation and limit constraints of photovoltaic equipment can be limited according to the scheduling strategy determined by the previous level, and the photovoltaic scheduling unit can decompose the instructions of the scheduling strategy sent by the previous level according to the principle of equal proportion.

[0119] The photovoltaic dispatching unit collects data from photovoltaic equipment and, if it determines that there is an abnormal photovoltaic signal, can generate an event alarm based on the abnormal photovoltaic signal, or notify the operation and maintenance personnel through DingTalk, email, etc. In addition, the photovoltaic dispatching unit can also support the definition of photovoltaic time-of-use grid-connected electricity prices, and calculate photovoltaic time-of-use power generation based on the time-of-use electricity price, as well as calculate its total revenue, revenue per kWp, equivalent power generation time, etc.

[0120] The following is an introduction to the charging scheduling unit, which refers to a collection of one or a group of charging systems (charging gun + charging pile + incoming meter). For the scenario of charging multiple guns in a pile, a corresponding charging scheduling unit should be built for a single group charging pile. The charging scheduling unit can collect data from charging piles, meters, etc., and calculate the corresponding maximum active power and minimum active power (positive charging and negative discharging) based on the power demand of electric vehicles. Among them, the maximum active power is:

[0121] Maximum active power = min (current required power, maximum power of charging gun);

[0122] For traditional DC charging piles, the minimum active power is:

[0123] Minimum charging power = maximum charging power * k; k is a preset coefficient that can be configured by the charging operator. The larger the k value, the less power is allowed to be limited on the charging pile.

[0124] For V2G charging piles, the minimum charging power is:

[0125] Minimum charging power = -1*maximum discharge power = -1*maximum discharge power limit;

[0126] When the charging gun increases the charging power, the rate of increase in power in each regulation cycle is:

[0127] Increase power conversion rate = maximum charging power - current power;

[0128] When the charging gun reduces the charging power, the power reduction rate in each regulation cycle is:

[0129] The power change rate is adjusted downward = min (maximum power change step, current power - minimum charging power).

[0130] For a charging scheduling unit of multiple charging guns, the maximum active power, minimum active power, increase power change rate and increase power change rate of the charging scheduling unit are the sum of the corresponding parameters of each charging pile.

[0131] The charging scheduling unit can adjust the charging power through the alignment of the upper-level scheduling unit. For charging piles that need to be economically discharged or economically charged and discharged, if the scheduling strategy sent by the upper-level scheduling unit is not received, economic discharge or economic charging and discharging can be performed according to the economic operation curve of the charging gun sent from the cloud. In addition, the power upper limit and power lower limit can be configured according to the data entered by the administrator, and the power limit curve sent from the cloud can be obtained. When allocating power to the charging pile, the charging pile scheduling unit can ensure that the power of the charging pile is within the limit constraint range, and can also receive the power limit sent by the upper-level scheduling unit. When the charging scheduling unit decomposes the scheduling instructions sent by the upper level, it can decompose according to the charging needs of the charging pile or SOC decomposition. Of course, it can also decompose according to user priority according to actual needs.

[0132] The charging dispatch unit can also analyze the collected charging pile data and generate event alarms when abnormal signals are determined, which can notify the operation and maintenance personnel through DingTalk, email, etc. In addition, it can also support the definition of charging time-sharing electricity prices, calculate the charging pile time-sharing charging power based on the time-sharing electricity prices, and calculate its total charging cost. The charging pile dispatch unit can support the interaction with the charging operation platform, allowing the charging operation platform to start and stop charging pile operations and actively send order information.

[0133] In addition, the embodiments of the present invention may also include a fixed load scheduling unit for fixed loads. The fixed load scheduling unit refers to a collection of one or a group of fixed load systems. The fixed loads generally operate off-grid, or are regulated by stopping power supply by opening the switch during the demand response period.

[0134] The fixed load dispatch unit can collect data from the load meter. Its maximum active power and minimum active power are equal to the current load power, and the upward power change rate and downward power change rate are both 0. The fixed load dispatch unit does not need to be dispatched during normal operation, and does not receive superior dispatch instructions, allowing power limit safety constraints. However, the fixed load principle can receive superior dispatch limits in emergency situations and cut loads according to load priority.

[0135] The following introduces the maximum effective power, minimum effective power, upward power change rate, and downward power change rate of the micro-level scheduling unit in different scenarios:

[0136] The next level of the micro-level dispatching unit is at least one terminal-level dispatching unit, that is, the micro-level dispatching unit supports nesting, for example, a 220kV main transformer dispatching unit contains multiple 10kV line dispatching units; a 10kV line dispatching unit contains multiple substation dispatching units; a substation dispatching unit contains multiple user dispatching units, etc. Figure 6 As shown,

[0137] According to the actual connection mode of the power grid, the micro-level dispatching unit may include a single grid-connected point dispatching unit, a multi-grid-connected point dispatching unit or a DC mutual assistance dispatching unit, etc. The micro-level dispatching unit does not directly control the power equipment, but indirectly controls the power equipment through the end-level dispatching unit, that is, the micro-level dispatching unit contains multiple end-level dispatching units and does not directly contain power equipment.

[0138] For the single-grid-connected point dispatching unit, the single-grid-connected point dispatching unit is the most common form of microgrid dispatching unit. It contains a variety of different types of subordinate dispatching units (i.e., end-level dispatching units) after a grid access point (grid-connected point). The single-grid-connected point dispatching unit should support the configuration of the adjustable state of the subordinate dispatching unit. When the adjustable state of the subordinate dispatching unit is 0, the subordinate dispatching unit is uncontrollable. Figure 7 As shown, F1 is an incoming line switch, and the adjustable state of the lower-level dispatching unit can be controlled by the state of F1. For example, when F1 is 0, it indicates an adjustable state, and when F1 is 1, it indicates an unadjustable state.

[0139] The single grid-connected point dispatching unit can collect data on the grid-connected point switch status, branch switch status, and electric meter, and can obtain data on each terminal-level dispatching unit at the next level. Among them, the maximum active power, minimum active power, upward power change rate, and downward power change rate of the single grid-connected point dispatching unit are the sum of each lower-level dispatching unit, as follows:

[0140] Maximum active power = min{∑(k n × Maximum active power n ), own power limit};

[0141] Minimum active power = max{∑(k n ×Minimum active power n ), own power lower limit};

[0142] Increase power change rate = ∑(k n ×Increase the power change rate n );

[0143] Downward power change rate = ∑(k n ×Decrease the power change rate n ).

[0144] Among them, n is the number of lower-level scheduling units, k n The adjustable state of the nth terminal-level dispatching unit is 0 when it is adjustable and 1 when it is not adjustable. The maximum active power n is the maximum active power and minimum active power of the nth terminal-level dispatching unit n is the minimum active power of the nth terminal-level dispatching unit, and the power change rate is increased nis the power change rate of the nth terminal scheduling unit, and the power change rate of the nth terminal scheduling unit n To reduce the power change rate.

[0145] The single grid-connected point dispatching unit takes the only grid-connected point as the dispatching target. When there is no instruction sent by the superior dispatching unit, the single grid-connected point dispatching unit can refer to the economic dispatching curve sent down from the cloud to achieve peak shaving and valley filling of the dispatching unit; when there is an instruction sent by the superior dispatching unit, the single grid-connected point dispatching unit can respond to the superior dispatching instruction, and specifically determine whether to execute the instruction based on whether the instruction is within the validity period.

[0146] The single grid-connected point dispatching unit can configure the upper and lower power limits according to actual needs based on the configuration information sent by the staff. It can also receive the power limit curve sent from the cloud, and ensure that the power is within the limit constraint range according to the power limit curve. It can also receive the power limit sent by the upper-level dispatching unit to configure its own limit, etc.

[0147] The single grid point dispatch unit can also configure the upper adjustment priority and lower adjustment priority of the subordinate dispatch units. When receiving a dispatch instruction, the dispatch order can be selected according to the adjustment priority corresponding to the dispatch instruction:

[0148] a) When the current power value is judged as an upward adjustment instruction, the dispatch unit with the highest priority is adjusted first. After the set value reaches the maximum power value, the dispatch unit with the second highest priority is selected for adjustment;

[0149] b) When the current power value is judged as a downward adjustment instruction, the dispatch unit with the highest priority is adjusted first. After the set value reaches the minimum power value, the dispatch unit with the second highest priority is selected for adjustment.

[0150] Among them, if the power corresponding to the scheduling instruction is greater than the current power, the scheduling instruction is an upward adjustment instruction; if the power corresponding to the scheduling instruction is less than the current power, the scheduling instruction is a downward adjustment instruction.

[0151] Since the single grid-connected point dispatching unit supports the configuration of the controllable state of the subordinate dispatching unit, it can easily support multi-grid-connected point scenarios. The multi-grid-connected point application scenario is generally aimed at large-scale campus power grids, which have multiple grid incoming lines. Figure 8 The schematic diagram of the architecture of the multi-grid-connected point dispatching unit is shown. The park has two incoming line switches F1 and F2. Usually, the bus tie switch F0 is in the open state. The microgrid resources under different incoming lines are constructed into two dispatching units A and B, which operate independently. However, when there is bus maintenance, F1 and F0 are closed, and all microgrid resources are attributed to the A dispatching unit; F2 and F0 are closed, and all microgrid resources are attributed to the B dispatching unit.

[0152] For this application scenario, four single grid-connected point dispatching units A, B, A', and B' can be set, where the F0 outflow dispatching unit A' is defined as positive. The grid-connected point power of A' is F1-F0, and the grid-connected point power of B' is F2+F0. A' and B' set their own grid-connected point economic operation curves respectively, but do not set power limit safety constraints. Then:

[0153] For a single grid-connection point dispatch unit A, the grid-connection point of A is F1, and A' and B' are both its subordinate dispatch units, then:

[0154] The maximum active power and minimum active power of microgrid dispatching unit A are:

[0155] Maximum active power = m*A' maximum active power + n*B' maximum active power;

[0156] Minimum active power = m*A'minimum active power + n*B'minimum active power;

[0157] The power change rates for upward adjustment and downward adjustment are:

[0158] Increase power change rate = m*A' increase power change rate + n*B' increase power change rate;

[0159] Downward power change rate = m*A' downward power change rate + n*B' downward power change rate;

[0160] Among them, when F1 = 1, m = 1; when F1 = 0, m = 0; when F1 = 1 and F0 = 1, n = 1; in other cases, n = 0, increasing the power change rate is also equivalent to increasing the active power change rate, and increasing the power change rate is also equivalent to decreasing the active power change rate.

[0161] When there is a dispatch instruction from a superior or when the safety constraint is exceeded, a dispatch instruction is issued. If n = 1, the instruction is distributed to A' and B' in equal proportion; otherwise, it is directly distributed to A'.

[0162] For the single grid-connection point dispatching unit B, the grid-connection point of the single grid-connection point dispatching unit B is F2, and A' and B' are both its subordinate dispatching units.

[0163] The maximum active power and minimum active power of microgrid dispatching unit B are:

[0164] Maximum active power = x*A' maximum active power + y*B' maximum active power;

[0165] Minimum active power = x*A'minimum active power + y*B'minimum active power;

[0166] The power change rates for upward adjustment and downward adjustment are:

[0167] Increase power change rate = x*A' increase power change rate + y*B' increase power change rate;

[0168] Downward power change rate = x*A' downward power change rate + y*B' downward power change rate;

[0169] Among them, when F2 =1, y=1; when F2=0, y=0; when F1=0 and F0=1, x=1; in other cases, x=0, increasing the power change rate is also to increase the active power change rate, and increasing the power change rate is also to decrease the active power change rate.

[0170] When there is a dispatch instruction from the superior or when the safety constraint is exceeded, a dispatch instruction is issued. If x = 1, the instruction is distributed equally to A' and B'; otherwise, it is directly distributed to B'.

[0171] For the DC mutual assistance dispatching unit, DC bus mutual assistance is an expansion and optimization of the multi-grid point (main transformer) dispatching unit, which realizes the power mutual assistance of multiple grid points through the DC bus. Fig. 9 As shown in the figure, the DC mutual assistance dispatching unit refers to the DC bus part. The DC mutual assistance dispatching unit S consists of two ACDC incoming lines, and the two incoming lines need to specify the main dispatching point M and the slave dispatching point F. The DC mutual assistance dispatching unit contains a subordinate single grid-connected point dispatching unit S'. Among them, the flexible dispatching resources on the AC bus constitute the single grid-connected point dispatching units A' and B' respectively.

[0172] The DC mutual assistance dispatching unit S collects the operating status of ACDC and DC side equipment, and estimates its regulation capability (such as current status (including current power), expected status (including expected power), upper regulation space and lower regulation space). Specifically:

[0173] For the dispatching point F, the maximum active power and minimum active power are:

[0174] Maximum active power = min (F power upper limit, ACDC rated power);

[0175] Minimum active power = max (F power lower limit, -1*ACDC rated power);

[0176] For the main grid-connected point M, its maximum active power and minimum active power are:

[0177] Maximum active power = min (S' maximum active power + F current active power, ACDC rated power);

[0178] Minimum active power = max(S'minimum active power + F current active power, -1*ACDC rated power).

[0179] The DC mutual aid dispatching unit is connected by two DC lines. The upper single grid-connected point dispatching unit A includes the DC mutual aid dispatching unit S main grid-connected point M. The upper single grid-connected point dispatching unit B includes the DC mutual aid dispatching unit S slave grid-connected point F.

[0180] In terms of scheduling strategy, A', B', and C' can accept the economic operation curve in the cloud and operate autonomously according to the economic operation curve. When B receives the scheduling instruction from the superior, it is decomposed into B' and S slave scheduling point F according to the priority; when A receives the scheduling instruction from the superior, it is decomposed into B' and S master scheduling point M according to the priority, and S sends the difference between the master and slave scheduling points as the scheduling instruction to S'.

[0181] For power limit safety constraints, dispatch units A and B can set power upper and lower limits according to actual needs and the setting information input by the administrator, and can also receive the power limit curve sent from the cloud, and can also receive the power limit from the upper-level dispatch unit. On the other hand, the dispatch unit from the grid connection point F can also set power upper and lower limits and the power limit curve sent from the cloud according to actual needs and the setting information input by the administrator.

[0182] In addition, the DC mutual assistance dispatching unit directly sends the dispatching instruction difference between the master and slave grid connection points to the subordinate dispatching unit S'.

[0183] The maximum active power and minimum active power of the cluster dispatching unit are introduced below:

[0184] The aggregate dispatching unit refers to a dispatching unit that manages multiple micro-level units in a coordinated manner, aggregates their regulation capabilities to participate in the power auxiliary service market, and the aggregate dispatching unit can be a virtual unit. The virtual power plant dispatching unit does not have a uniquely confirmed grid access point, but rather coordinates the management of all dispatching units within the contracted scope of a certain power grid dispatching curve to achieve group dispatching and group control of dispatching units.

[0185] The cluster dispatch unit (also known as the virtual power plant) can aggregate the subordinate dispatch units within the province or city, summarize the data and report it to the power grid. The maximum active power, minimum active power and power change rate of the cluster dispatch unit are the sum of the subordinate dispatch units.

[0186] Maximum active power = ∑k n × Maximum active power n ;

[0187] Minimum active power = ∑k n ×Minimum active power n ;

[0188] The virtual power plant can adjust its total load power plan based on the results of medium- and long-term spot market transactions, and can also adjust its operating power according to the grid dispatch instructions. There is no need to impose power limit constraints. The virtual power plant allocates grid regulation instructions according to regulation performance and regulation cost.

[0189] It can be seen that in the embodiment of the present invention, the dispatching units at various levels are determined in combination with the power supply branches and grid connection points in the microgrid, and the three-level dispatching of the microgrid is formed by the end-level dispatching unit, the micro-level dispatching unit and the aggregation-level dispatching unit. The end-level dispatching unit can formulate an initial equipment power dispatching strategy for the corresponding power equipment, and send the power regulation status information of the end-level dispatching unit to the micro-level dispatching unit at the upper level. The micro-level dispatching unit will generate an end-level power dispatching strategy for the end-level dispatching unit according to its own power limit data and the power regulation status information sent by the end-level dispatching unit. The end-level dispatching unit will make corresponding adjustments to the formulated initial equipment power dispatching strategy according to the end-level power dispatching strategy returned by the micro-level dispatching unit at the upper level, and use the adjusted equipment power dispatching strategy to dispatch and control the power of the corresponding power equipment, so as to realize the reasonable power distribution of each power equipment under the end-level dispatching unit. In this application, when performing microgrid dispatching, the three-level dispatching unit is determined in combination with the grid connection point and each power supply branch, so that the power of the end-level power equipment can be more reasonably dispatched and allocated, which is conducive to ensuring the economic and safe operation of the microgrid.

[0190] That is, the end-micro-aggregate three-level dispatch proposed in this patent realizes the aggregate management and group control of similar regulation resources through the end-level dispatch unit. Through the nested association of the micro-level dispatch unit, the connection relationship of the microgrid is simply and clearly described, and the limit constraints are supported to be set at any position. Under the limit constraints, the power allocation of the end-level dispatch unit is realized. The aggregate dispatch unit aggregates and manages the discrete microgrid regulation capabilities to provide support for participating in the virtual power plant.

[0191] The present invention also provides a corresponding device for the microgrid dispatching and control method, which further makes the method more practical. Among them, the device can be described from the perspective of functional modules and hardware. The microgrid dispatching and control device provided by the present invention is introduced below. The device is used to implement the microgrid dispatching and control method provided by the present invention. In this embodiment, the microgrid dispatching and control device may include or be divided into one or more program modules, and the one or more program modules are stored in a storage medium and executed by one or more processors to complete the microgrid dispatching and control method disclosed in the above embodiment. The program module referred to in the present invention refers to a series of computer program instruction segments that can complete specific functions, which is more suitable for describing the execution process of the microgrid dispatching and control device in the storage medium than the program itself. The following description will specifically introduce the functions of each program module of this embodiment. The microgrid dispatching and control device described below and the microgrid dispatching and control method described above can be referred to each other.

[0192] From the perspective of functional modules, see Fig.10 , Fig.10 This is a structural diagram of a microgrid dispatching and control device provided by the present invention. The device is applied to any dispatching unit in a microgrid dispatching and control system. The microgrid dispatching and control system includes an end-level dispatching unit corresponding to each type of power equipment under each power supply branch, a micro-level dispatching unit corresponding to each power supply branch, and an aggregation-level dispatching unit corresponding to the power grid. The levels of the end-level dispatching unit, the micro-level dispatching unit, and the aggregation-level dispatching unit increase in sequence. The power grid is connected to one end of each power supply branch through each grid connection point, and the other end of each power supply branch is connected to several types of power equipment. The device includes:

[0193] The first determination module 11 is used to determine the initial device power scheduling strategy and power regulation state information for the power device when the scheduling unit is an end-level scheduling unit;

[0194] A first sending module 12 is used to send the power regulation state information to the corresponding micro-level scheduling unit, so that the micro-level scheduling unit determines the end-level power scheduling strategy for the end-level scheduling unit according to the power regulation state information and its own power limit data;

[0195] The first adjustment module 13 is used to adjust the initial device power scheduling strategy based on the terminal-level power scheduling strategy, so as to perform scheduling control on the power equipment based on the adjusted device power scheduling strategy.

[0196] It should be noted that the microgrid dispatching and control device provided in the embodiment of the present invention has the same beneficial effects as the microgrid dispatching and control method provided in the above embodiment, and for the specific introduction of the microgrid dispatching and control method involved in the embodiment of the present invention, please refer to the above embodiment, and this application will not repeat it here.

[0197] On the basis of the above embodiments, another aspect of the embodiments of the present invention provides a microgrid dispatching and control system, which includes: an end-level dispatching unit corresponding to each type of power equipment under each power supply branch, a micro-level dispatching unit corresponding to each power supply branch, and an aggregation-level dispatching unit corresponding to the power grid, wherein the levels of the end-level dispatching unit, the micro-level dispatching unit, and the aggregation-level dispatching unit are increased in sequence, the power grid is connected to one end of each power supply branch through each grid connection point, and the other end of each power supply branch is connected to several types of power equipment; wherein any dispatching unit includes a memory and a processor;

[0198] Memory for storing computer programs;

[0199] The processor is used to implement the steps of the microgrid dispatching control method as described above when executing a computer program.

[0200] On the basis of the above embodiment, another aspect of the embodiment of the present invention provides an electronic device, including:

[0201] Memory for storing computer programs;

[0202] A processor is used to execute the computer program to implement the steps of the microgrid dispatching control method as described above.

[0203] The memory and processor in the microgrid dispatching and control system of the above embodiment, and the memory and processor in the electronic device of the above embodiment, can be implemented in the following manner:

[0204] The processor may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0205] The memory may include one or more computer-readable storage media, which may be non-transitory. The memory may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices and flash storage devices. In some embodiments, the memory may be an internal storage unit of an electronic device, such as a hard disk of a server. In other embodiments, the memory may also be an external storage device of an electronic device, such as a plug-in hard disk equipped on a server, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the memory may also include both an internal storage unit and an external storage device of an electronic device. The memory may be used not only to store application software and various types of data installed in the electronic device, such as the code of the program in the process of executing the microgrid dispatching control method, but also to temporarily store data that has been output or is to be output. In this embodiment, the memory is at least used to store the following computer program, wherein, after the computer program is loaded and executed by the processor, the relevant steps of the microgrid dispatching control method disclosed in any of the aforementioned embodiments can be implemented. In addition, the resources stored in the memory may also include an operating system and data, etc., and the storage method may be temporary storage or permanent storage. The operating system may include Windows, Unix, Linux, etc. The data may include but is not limited to (data corresponding to the microgrid dispatching control result) and the like.

[0206] It is understandable that if the microgrid dispatching and control method in the above embodiment is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), electrically erasable programmable ROM, register, hard disk, removable disk, CD-ROM, disk or optical disk and other media that can store program codes.

[0207] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0208] On the basis of the above-mentioned embodiment, another aspect of the embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the microgrid dispatching control method as described above are implemented.

[0209] On the basis of the above-mentioned embodiment, another aspect of the embodiment of the present invention provides a computer program product, including a computer program / instruction, which implements the steps of the above-mentioned microgrid dispatching control method when executed by a processor.

[0210] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0211] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A microgrid dispatching control method, characterized in that: Applicable to any dispatching unit in a microgrid dispatching and control system, the microgrid dispatching and control system includes an end-level dispatching unit corresponding to each type of power equipment under each power supply branch, a micro-level dispatching unit corresponding to each power supply branch, and an aggregate-level dispatching unit corresponding to the power grid, wherein the levels of the end-level dispatching unit, the micro-level dispatching unit, and the aggregate-level dispatching unit are increased in sequence, the power grid is connected to one end of each power supply branch through each grid connection point, and the other end of each power supply branch is connected to several types of power equipment; the method includes: In the case where the dispatching unit is an end-level dispatching unit, determining an initial device power dispatching strategy and power regulation state information for the power device; Sending the power regulation state information to a corresponding micro-level scheduling unit, so that the micro-level scheduling unit determines an end-level power scheduling strategy for the end-level scheduling unit according to the power regulation state information and its own power limit data; The initial device power scheduling strategy is adjusted based on the end-level power scheduling strategy, so as to perform scheduling control on the power equipment based on the adjusted device power scheduling strategy.

2. The microgrid dispatching control method according to claim 1, characterized in that: Also includes: In the case where the scheduling unit is a micro-level scheduling unit, the power adjustment state information of the micro-level scheduling unit and the initial end-level power scheduling strategy for the end-level scheduling unit are determined according to the power adjustment state information sent by the end-level scheduling unit of the next level combined with the power limit data of the micro-level scheduling unit; Sending the power regulation state information of the micro-level scheduling unit to the aggregate scheduling unit, so that the aggregate scheduling unit determines the micro-level power scheduling strategy for the micro-level scheduling unit based on the power regulation state information of the micro-level scheduling unit and the power limit data of the aggregate scheduling unit; The initial end-level power scheduling policy is adjusted based on the micro-level power scheduling policy, and the adjusted end-level power scheduling policy is sent to the end-level scheduling unit.

3. The microgrid dispatching control method according to claim 1, characterized in that: Also includes: In the case where the scheduling unit is a cluster scheduling unit, a micro-level power scheduling strategy for the micro-level scheduling unit is determined according to the power regulation state information sent by the micro-level scheduling unit of the next level combined with the power limit data of the cluster scheduling unit; The micro-level power scheduling policy is sent to the micro-level scheduling unit so that the micro-level scheduling unit adjusts the initial end-level power scheduling policy for the end-level scheduling unit based on the micro-level power scheduling policy, and sends the adjusted end-level power scheduling policy to the end-level scheduling unit.

4. The microgrid dispatching control method according to claim 2, characterized in that: Also includes: In the case where the scheduling unit is an end-level scheduling unit, based on the validity period carried by the end-level power scheduling policy, when it is determined that the end-level power scheduling policy is within the validity period, the step of adjusting the initial device power scheduling policy based on the end-level power scheduling policy is performed; When it is determined that the terminal-level power scheduling strategy has exceeded the validity period, the power equipment is directly dispatched and controlled based on the initial equipment power scheduling strategy; or, in the case where the scheduling unit is a micro-level scheduling unit, based on the validity period carried by the micro-level power scheduling policy, when it is determined that the micro-level power scheduling is within the validity period, the step of adjusting the initial end-level power scheduling policy based on the micro-level power scheduling policy and sending the adjusted end-level power scheduling policy to the end-level scheduling unit is performed; When it is determined that the micro-level scheduling strategy exceeds the validity period, the initial end-level power scheduling strategy is directly sent to the end-level scheduling unit.

5. The microgrid dispatching control method according to any one of claims 1 to 4, characterized in that: The power regulation status information includes one or more of the current power, expected power, maximum active power, minimum active power, upward power change rate and downward power change rate of the scheduling unit.

6. The microgrid dispatching control method according to claim 5, characterized in that: The terminal-level scheduling unit includes an energy storage scheduling unit corresponding to the energy storage device, a photovoltaic scheduling unit corresponding to the photovoltaic device, and a charging pile scheduling unit corresponding to the charging pile.

7. The microgrid dispatching control method according to claim 5, characterized in that: In the case where the dispatching unit is an end-level dispatching unit; the maximum active power is the sum of the maximum active powers of each power device, the minimum active power is the sum of the minimum active powers of each power device; the upward power change rate is the sum of the upward power change rates of each power device; the downward power change rate is the sum of the downward power change rates of each power device; In the case where the dispatching unit is a micro-level dispatching unit, the maximum active power is the sum of the maximum active powers of each adjustable end-level dispatching unit located at the next level of the micro-level dispatching unit and the minimum value of the upper power limit of the micro-level dispatching unit; the minimum active power is the sum of the minimum active powers of each adjustable end-level dispatching unit located at the next level of the micro-level dispatching unit and the maximum value of the lower power limit of the micro-level dispatching unit; the upward power change rate is the sum of the upward power change rates of each adjustable end-level dispatching unit located at the next level of the micro-level dispatching unit; the downward power change rate is the sum of the downward power change rates of the upward power change rates.

8. The microgrid dispatching control method according to claim 7, characterized in that: In the case where the dispatching unit is an energy storage dispatching unit and the power equipment is an energy storage equipment, the maximum active power of the energy storage equipment is the minimum value among the BMS maximum charging power, the PCS rated power and its own power upper limit; the minimum active power of the energy storage equipment is the maximum value among the negative BMS maximum charging power, the negative PCS rated power and its own power lower limit; the upward power change rate of the energy storage equipment is the difference between the maximum active power and the current power; the downward power change rate of the energy storage equipment is the minimum value among the maximum active power change compensation and the difference between the current power and the minimum charging power; In the case where the dispatching unit is a photovoltaic dispatching unit and the power equipment is a photovoltaic equipment, the maximum active power of the photovoltaic equipment is zero; the minimum active power of the photovoltaic equipment is the maximum value of the difference between the current power and the preset adjustable power value and the negative value of the rated power of the photovoltaic inverter; the upward power change rate of the photovoltaic equipment is the negative value of the current power generation power; the downward power change rate of the photovoltaic equipment is the minimum value of the maximum active power change step and the difference between the current power and the minimum active power; When the dispatching unit is a charging pile dispatching unit and the power equipment is a charging pile, the maximum active power of the charging pile is the minimum value of the current demand power and the maximum active power of the charging gun; the minimum active power of the charging pile is determined based on the type of charging pile; the upward power change rate of the charging pile is the difference between the maximum charging power and the current power; the downward power change rate of the charging pile is the minimum value of the maximum active power change step and the difference between the current power and the minimum charging power.

9. A microgrid dispatching control device, characterized in that: Applicable to any dispatching unit in a microgrid dispatching and control system, the microgrid dispatching and control system includes an end-level dispatching unit corresponding to each type of power equipment under each power supply branch, a micro-level dispatching unit corresponding to each power supply branch, and an aggregate-level dispatching unit corresponding to the power grid, wherein the levels of the end-level dispatching unit, the micro-level dispatching unit, and the aggregate-level dispatching unit are increased in sequence, the power grid is connected to one end of each power supply branch through each grid connection point, and the other end of each power supply branch is connected to several types of power equipment; the device includes: A first determination module, configured to determine an initial device power scheduling strategy and power regulation state information for the power device when the scheduling unit is an end-level scheduling unit; A first sending module, configured to send the power regulation state information to a corresponding micro-level scheduling unit, so that the micro-level scheduling unit determines an end-level power scheduling strategy for the end-level scheduling unit according to the power regulation state information and its own power limit data; The first adjustment module is used to adjust the initial device power scheduling strategy based on the terminal-level power scheduling strategy, so as to perform scheduling control on the power equipment based on the adjusted device power scheduling strategy.

10. A microgrid dispatching and control system, characterized in that: include: An end-level dispatching unit corresponding to each type of power equipment under each power supply branch, a micro-level dispatching unit corresponding to each power supply branch, and an aggregate-level dispatching unit corresponding to the power grid, wherein the levels of the end-level dispatching unit, the micro-level dispatching unit, and the aggregate-level dispatching unit are increased in sequence, the power grid is connected to one end of each power supply branch through each grid connection point, and the other end of each power supply branch is connected to several types of power equipment; wherein any dispatching unit includes a memory and a processor; The memory is used to store computer programs; The processor is used to implement the steps of the microgrid dispatching control method as claimed in any one of claims 1 to 8 when executing the computer program.

11. An electronic device, characterized in that: include: Memory for storing computer programs; A processor is used to execute the computer program to implement the steps of the microgrid dispatching control method as described in any one of claims 1 to 8.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the microgrid dispatching control method according to any one of claims 1 to 8 are implemented.

13. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the microgrid dispatching control method described in any one of claims 1 to 8 are implemented.

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