Hydrogen-containing energy storage energy microgrid optimization scheduling method and system

Abstract

The system comprises a plurality of distributed hydrogen-containing energy storage monomers and a plurality of energy exchange stations, the energy exchange stations are electrically connected with a power grid main network and the distributed hydrogen-containing energy storage monomers, and each distributed hydrogen-containing energy storage monomer comprises a distributed hydrogen energy battery and an electrolysis module. A distributed hydrogen energy battery charging module is connected between the distributed hydrogen energy battery and the electrolytic tank, the energy exchange station is electrically connected with the electrolytic module and the distributed hydrogen energy battery charging module, and the energy exchange station is connected to the master console. According to the invention, the energy exchange station is arranged to realize mutual power complementation between the distributed hydrogen-containing energy storage monomers, so that local consumption of the power distribution network is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen-containing energy storage, and in particular to an energy microgrid optimization scheduling method and system for hydrogen-containing energy storage. Background Art

[0002] Large-scale access to new energy has led to insufficient local absorption capacity of distribution networks. With the large-scale access of distributed new energy to distribution networks, power reverse transmission has occurred in some areas, and distribution networks are facing great pressure to absorb new energy locally. In the future, a high proportion of distributed new energy will be connected to the distribution network, which will inevitably have an impact on the safe and stable operation of the distribution network and the large power grid. Therefore, it is necessary to further improve the distribution network's ability to absorb distributed new energy locally. Existing distributed new energy has two modes: island operation and grid-connected operation. In the island operation mode, distributed power sources and part of the load will form a self-sufficient island, and the distributed power source will independently supply power to the load. Referring to a load reduction method applied to an active distribution network with Chinese patent publication number CN104504524A, the active distribution network is in an isolated island area, including a load point, a distributed power source and a battery. The method includes: step 11: setting an initial time, an end time and a time interval, calculating the total power of the load point in the time interval when its reduction state is 1, and determining the initial time as the simulation clock time; step 12: at the currently determined simulation clock time, calculating the first net exchange power of the isolated island area, judging whether the first net exchange power is greater than 0, if not, controlling the distributed power source to charge the battery, and determining its actual absorption power in the time interval according to the battery parameters of the battery, Calculate and update the battery parameters according to the actual absorbed power, and execute step 13; if yes, determine the maximum discharge power of the battery within the time interval according to the battery parameters; judge whether the maximum discharge power meets the preset conditions, if yes, calculate the actual release power of the battery within the time interval, calculate and update the battery parameters according to the actual release power, and execute step 13; if not, determine the load point with the smallest total power, set its reduction state to 0, and execute step 13; step 13: take the sum of the simulation clock time and the time interval as the currently determined simulation clock time, execute step 12, until the simulation clock time is equal to the end time, and count and record the reduction state of the load point. The active distribution network can complement the power of the mains in the grid-connected mode, and can use the mains to charge the active distribution network for peak shaving and valley filling of the power grid. However, neither of these two modes can achieve power mutual assistance between distributed power sources, which is not conducive to local consumption of the distribution network. Summary of the invention

[0003] The present invention solves the problem that the existing distributed power supply operation mode cannot achieve power mutual assistance, and proposes an energy microgrid optimization scheduling method and system for hydrogen energy storage. By setting up an energy exchange station, power mutual assistance between distributed hydrogen energy storage units is achieved, which is beneficial to the on-site consumption of the distribution network.

[0004] In order to achieve the above objectives, the following technical solutions are proposed: A hydrogen-containing energy storage energy microgrid optimization dispatching system includes a plurality of distributed hydrogen-containing energy storage cells and a plurality of energy exchange stations, wherein the energy exchange stations are electrically connected to a power grid main network and the distributed hydrogen-containing energy storage cells, wherein the distributed hydrogen-containing energy storage cells include distributed hydrogen energy cells and electrolysis modules, wherein a distributed hydrogen energy battery charging module is connected between the distributed hydrogen energy cells and the electrolysis cells, wherein the energy exchange stations are electrically connected to the electrolysis modules and the distributed hydrogen energy battery charging modules, and wherein the energy exchange stations are connected to a main control console.

[0005] The dispatching system of the present invention includes: a distributed hydrogen-containing energy storage unit, which is provided with a distributed hydrogen energy battery, an electrolysis module and a distributed hydrogen energy battery charging module. The distributed hydrogen energy battery outputs a certain power to supply power to the electrical equipment in the area to which it belongs; the electrolysis module uses the electric energy of the main power grid to electrolyze hydrogen; the distributed hydrogen energy battery charging module uses the hydrogen electrolyzed by the electrolysis module to charge the distributed hydrogen energy battery; the main power grid charges the energy exchange station; the energy exchange station monitors the output power of the distributed hydrogen energy battery and the main power grid, and charges and discharges the distributed hydrogen energy battery and the main power grid; the main control station receives the power demand issued by the demand side, generates and sends the control command to the energy exchange station, and controls the energy exchange station to charge and discharge the distributed hydrogen energy battery and the main power grid. The energy exchange station uses the electric energy of the main power grid to electrolyze hydrogen in the electrolysis module, and the hydrogen is transported to the distributed hydrogen energy battery charging module to charge the distributed hydrogen energy battery, and the distributed hydrogen energy battery can undergo chemical reaction, and the generated electric energy can charge the main power grid. The present invention uniformly regulates all distributed hydrogen-containing energy storage cells within a certain area. Each distributed hydrogen-containing energy storage cell and its coverage area are regarded as a distributed hydrogen-containing energy storage cell. A number of distributed hydrogen-containing energy storage cells are arranged in a certain area. Each distributed hydrogen-containing energy storage cell is connected to an energy exchange station. The energy exchange station and the distributed hydrogen-containing energy storage cells are connected to form an energy flow network, thereby realizing power mutual assistance of the distributed hydrogen-containing energy storage cells. This is a new type of grid-connected operation mode, which is beneficial to on-site consumption of the distribution network.

[0006] Preferably, the distributed hydrogen-containing energy storage unit is provided with a certain power supply range, and a power supply boundary is formed within the power supply range.

[0007] The distributed hydrogen-containing energy storage unit of the present invention is provided with a power supply boundary, and the power supply boundary encloses the power supply range of the distributed hydrogen-containing energy storage unit. A plurality of distributed hydrogen-containing energy storage units are provided in a certain area.

[0008] Preferably, the circuit topology of the power supply boundary is circular, at least one energy exchange station is provided between two adjacent distributed hydrogen-containing energy storage cells, the two adjacent energy exchange stations are communicatively connected via an information channel, and energy is exchanged between the distributed hydrogen-containing energy storage cells and the energy exchange station via a number of energy channels.

[0009] The topological diagram of the power supply boundary of the present invention is circular, and at least one energy exchange station is provided between two adjacent distributed hydrogen-containing energy storage cells. The two adjacent energy exchange stations are connected through information channel communication. The distributed hydrogen-containing energy storage cells are provided with a plurality of energy channels, and the energy channels are connected to the energy exchange station for energy exchange between the distributed hydrogen-containing energy storage cells and the energy exchange station.

[0010] Preferably, the energy exchange station is provided with a main control unit electrically connected to the main control console, the main control unit is electrically connected to an energy monitoring module and an energy conversion module through a data acquisition and exchange module, the energy conversion module is electrically connected to an energy storage module, the energy storage module is electrically connected to the data acquisition and exchange module, the energy monitoring module and the energy conversion module are electrically connected to an energy interface module respectively, and the energy interface module is electrically connected to a distributed hydrogen-containing energy storage unit and a power grid main grid.

[0011] The energy exchange station of the present invention includes an energy interface module, an energy conversion module, an energy storage module, a data acquisition and exchange module, an energy monitoring module and a main control unit. The energy storage module is connected to the energy interface module through the energy conversion module. The energy interface module is used to connect the external distributed hydrogen energy battery and the main power grid. The energy monitoring module is used to obtain the operating information of the energy interface module, the distributed hydrogen energy battery and the main power grid and send it to the main control unit through the data acquisition and exchange module. The energy conversion module and the energy storage module exchange information with the main control unit through the data acquisition and exchange module, and the main control unit is electrically connected to the main control console.

[0012] A method for optimizing and dispatching an energy microgrid containing hydrogen energy storage, using the above-mentioned energy microgrid optimizing and dispatching system containing hydrogen energy storage, comprises the following steps: S1, constructing a network topology diagram connecting energy exchange stations and distributed hydrogen energy storage units in the target area; S2, selecting candidate distributed hydrogen-containing energy storage units with surplus power and distributed hydrogen-containing energy storage units with insufficient power in the network topology diagram; S3, using the distributed hydrogen energy storage units with surplus power to supplement the power of the main grid, and establishing a power mutual assistance path with the constraint of passing through the least energy exchange stations.

[0013] S1, constructing a network topology diagram of distributed hydrogen-containing energy storage monomers in a target area, wherein the network topology diagram of distributed hydrogen-containing energy storage monomers includes a plurality of distributed hydrogen-containing energy storage monomers and an energy exchange station connecting the plurality of distributed hydrogen-containing energy storage monomers; S2, selecting all distributed hydrogen energy storage units with insufficient power and candidate distributed hydrogen energy storage units with surplus power from the distributed hydrogen energy storage units; S3, plans the power mutual assistance path according to the principle of passing through the least energy exchange station, so that the distributed hydrogen-containing energy storage cells with surplus power can supplement the power of the distributed hydrogen-containing energy storage cells with insufficient power.

[0014] Preferably, the S2 specifically comprises the following steps: S201, obtaining the load power and maximum output power of each distributed hydrogen-containing energy storage unit within a set period; S202, selecting a distributed hydrogen-containing energy storage unit whose maximum output power is less than the load power as a distributed hydrogen-containing energy storage unit with insufficient power; S203, obtaining the remaining power of the remaining distributed hydrogen-containing energy storage cells, and screening out candidate distributed hydrogen-containing energy storage cells with surplus power according to the magnitude of the remaining power and the predicted power.

[0015] The S2 of the present invention specifically comprises the following steps: S201, obtaining the load power P and the maximum output power P of each distributed hydrogen energy storage unit within a certain period T MAX and remaining battery power; S202, select all maximum output powers P MAX The distributed hydrogen-containing energy storage unit with a power less than the load power P is used as the distributed hydrogen-containing energy storage unit with insufficient power; S203, calculating the predicted power Q=2TP within two cycles of other distributed hydrogen-containing energy storage cells except the distributed hydrogen-containing energy storage cell with insufficient power, and selecting the distributed hydrogen-containing energy storage cells whose predicted power Q is less than or equal to the remaining power as candidate distributed hydrogen-containing energy storage cells with surplus power.

[0016] Preferably, the S203 specifically includes the following steps: The predicted power of the remaining distributed hydrogen-containing energy storage cells within two set periods is calculated, and the distributed hydrogen-containing energy storage cells whose predicted power is less than or equal to the remaining power are selected as candidate distributed hydrogen-containing energy storage cells with power surplus.

[0017] Preferably, the S3 specifically comprises the following steps: S301, obtaining a power difference of a distributed hydrogen-containing energy storage unit with insufficient power; S302, selecting the shortest path from the distributed hydrogen energy storage unit with insufficient power and passing through the least energy exchange station to a single candidate distributed hydrogen energy storage unit with surplus power; S303, the distributed hydrogen-containing energy storage unit with surplus power outputs power consistent with the power difference to the distributed hydrogen-containing energy storage unit with insufficient power through the shortest path.

[0018] The S3 of the present invention specifically comprises the following steps: S301, calculating the power difference P of each distributed hydrogen energy storage unit with insufficient power C , the calculation formula is as follows: P C =PP EB -a; Where: P EB is the rated output power of the distributed hydrogen energy storage unit with insufficient power; P is the load power of the distributed hydrogen energy storage unit; a is a compensation coefficient greater than 0, so that the power difference P C Smaller than the actual demand, to avoid excessive subsequent power compensation; S302, generating a transmission path from each of the insufficiently powered distributed hydrogen-containing energy storage cells to a single candidate with a surplus of powered distributed hydrogen-containing energy storage cell, and selecting a transmission path with the fewest energy exchange stations as the shortest path for the single insufficiently powered distributed hydrogen-containing energy storage cell; S303, integrating all transmission paths, and transmitting the power difference P from the distributed hydrogen energy storage unit with power surplus according to the shortest path C To the distributed hydrogen energy storage units with insufficient power.

[0019] Preferably, the S302 specifically includes the following steps: generating a transmission path from each of the insufficiently powered distributed hydrogen energy storage cells to a single candidate surplus-power distributed hydrogen energy storage cell, and selecting the transmission path with the least number of energy exchange stations as the shortest path for the single insufficiently powered distributed hydrogen energy storage cell.

[0020] Preferably, S303 also includes the following steps: when the rated output power of the distributed hydrogen-containing energy storage cell with surplus power is less than the power difference, the energy exchange station closest to the distributed hydrogen-containing energy storage cell with insufficient power outputs supplementary power to the distributed hydrogen-containing energy storage cell with insufficient power, supplementary power = power difference - rated output power, and the power shortage of the energy exchange station is recorded, and the energy exchange station is charged when the city power is in valley electricity.

[0021] The S303 further includes the following steps: determining the rated output power P of the distributed hydrogen-containing energy storage unit with power surplus EY Is it greater than or equal to the power difference P CIf so, the distributed hydrogen energy storage unit with surplus power is rated at output power P EY Output continuously for time t, where: t = TP C / P EY If not, the distributed hydrogen energy storage unit with surplus power will be rated at output power P EY The output is continuously output for a time T, and the energy exchange station closest to the distributed hydrogen energy storage unit with insufficient power continuously outputs supplementary power P for a time T J , where: P J =P C -P EY , and record the power shortage of the energy exchange station Qq = TP J , and charge it when the city power is in valley power, so that the charging amount is Qq.

[0022] The beneficial effect of the present invention is that the present invention uniformly regulates all distributed hydrogen-containing energy storage cells within a certain area, each distributed hydrogen-containing energy storage cell and its coverage area are regarded as a distributed hydrogen-containing energy storage cell, a certain area is provided with a plurality of distributed hydrogen-containing energy storage cells, each distributed hydrogen-containing energy storage cell is connected to an energy exchange station, the energy exchange station and the distributed hydrogen-containing energy storage cell are connected to form an energy flow network, and the power mutual assistance of the distributed hydrogen-containing energy storage cells is realized, which is a new type of grid-connected operation mode, and is conducive to the on-site consumption of the distribution network. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a topological diagram of the system of the present invention.

[0024] Figure 2 This is a diagram of the structure of the energy exchange station of the present invention.

[0025] Figure 3 It is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0026] Embodiment 1: This embodiment proposes an energy microgrid optimization dispatching system containing hydrogen energy storage, referring to Figure 1, including a distributed hydrogen-containing energy storage unit, equipped with a distributed hydrogen energy battery, an electrolysis module and a distributed hydrogen energy battery charging module. The distributed hydrogen energy battery outputs a certain power to supply power to the electrical equipment in its area; the electrolysis module uses the electric energy of the main power grid to electrolyze hydrogen; the distributed hydrogen energy battery charging module uses the hydrogen electrolyzed by the electrolysis module to charge the distributed hydrogen energy battery; the main power grid charges the energy exchange station; the energy exchange station monitors the output power of the distributed hydrogen energy battery and the main power grid, and charges and discharges the distributed hydrogen energy battery and the main power grid; the main control console receives the power demand from the demand side, generates and sends control instructions to the energy exchange station, and controls the energy exchange station to charge and discharge the distributed hydrogen energy battery and the main power grid. The energy exchange station uses the electric energy of the main power grid to electrolyze hydrogen in the electrolysis module, and the hydrogen is transported to the distributed hydrogen energy battery charging module to charge the distributed hydrogen energy battery, and the distributed hydrogen energy battery can undergo chemical reaction, and the generated electric energy can charge the main power grid. The present invention uniformly regulates all distributed hydrogen-containing energy storage cells within a certain area. Each distributed hydrogen-containing energy storage cell and its coverage area are regarded as a distributed hydrogen-containing energy storage cell. A number of distributed hydrogen-containing energy storage cells are arranged in a certain area. Each distributed hydrogen-containing energy storage cell is connected to an energy exchange station. The energy exchange station and the distributed hydrogen-containing energy storage cells are connected to form an energy flow network, thereby realizing power mutual assistance of the distributed hydrogen-containing energy storage cells. This is a new type of grid-connected operation mode, which is beneficial to on-site consumption of the distribution network.

[0027] The distributed hydrogen-containing energy storage unit of the present invention is provided with a power supply boundary, and the power supply boundary encloses the power supply range of the distributed hydrogen-containing energy storage unit. A plurality of distributed hydrogen-containing energy storage units are provided in a certain area.

[0028] The topological diagram of the power supply boundary of the present invention is circular, and at least one energy exchange station is provided between two adjacent distributed hydrogen-containing energy storage cells. The two adjacent energy exchange stations are connected through information channel communication. The distributed hydrogen-containing energy storage cells are provided with a plurality of energy channels, and the energy channels are connected to the energy exchange station for energy exchange between the distributed hydrogen-containing energy storage cells and the energy exchange station.

[0029] This embodiment also proposes a method for optimizing the dispatching of a microgrid containing hydrogen energy storage. Figure 3 , including the following steps: S1, constructing a network topology diagram of distributed hydrogen-containing energy storage monomers in a target area, wherein the network topology diagram of distributed hydrogen-containing energy storage monomers includes a plurality of distributed hydrogen-containing energy storage monomers and an energy exchange station connecting the plurality of distributed hydrogen-containing energy storage monomers; S2, selecting all the distributed hydrogen-containing energy storage units with insufficient power and candidate distributed hydrogen-containing energy storage units with surplus power from the distributed hydrogen-containing energy storage units; the S2 of the present invention specifically includes the following steps: S201, obtaining the load power P and the maximum output power P of each distributed hydrogen energy storage unit within a certain period T MAX and remaining battery power; S202, select all maximum output powers P MAX The distributed hydrogen-containing energy storage unit with a power less than the load power P is used as the distributed hydrogen-containing energy storage unit with insufficient power; S203, calculating the predicted power Q=2TP within two cycles of other distributed hydrogen-containing energy storage cells except the distributed hydrogen-containing energy storage cell with insufficient power, and selecting the distributed hydrogen-containing energy storage cells whose predicted power Q is less than or equal to the remaining power as candidate distributed hydrogen-containing energy storage cells with surplus power.

[0030] S3, plans the power mutual assistance path according to the principle of passing through the least energy exchange station, so that the distributed hydrogen-containing energy storage cells with surplus power can supplement the power of the distributed hydrogen-containing energy storage cells with insufficient power.

[0031] The S3 of the present invention specifically comprises the following steps: S301, calculating the power difference P of each distributed hydrogen energy storage unit with insufficient power C , the calculation formula is as follows: P C =PP EB -a; Where: P EB is the rated output power of the distributed hydrogen energy storage unit with insufficient power; P is the load power of the distributed hydrogen energy storage unit; a is a compensation coefficient greater than 0, so that the power difference P C Smaller than the actual demand, to avoid excessive subsequent power compensation; S302, generating a transmission path from each of the insufficiently powered distributed hydrogen-containing energy storage cells to a single candidate with a surplus of powered distributed hydrogen-containing energy storage cell, and selecting a transmission path with the fewest energy exchange stations as the shortest path for the single insufficiently powered distributed hydrogen-containing energy storage cell; S303, integrating all transmission paths, and transmitting the power difference P from the distributed hydrogen energy storage unit with power surplus according to the shortest path C To the distributed hydrogen energy storage units with insufficient power.

[0032] Embodiment 2: This embodiment optimizes the energy exchange station based on embodiment 1 and proposes an energy microgrid optimization dispatching system containing hydrogen energy storage. Figure 1, including a distributed hydrogen-containing energy storage unit, equipped with a distributed hydrogen energy battery, an electrolysis module and a distributed hydrogen energy battery charging module. The distributed hydrogen energy battery outputs a certain power to supply power to the electrical equipment in its area; the electrolysis module uses the electric energy of the main power grid to electrolyze hydrogen; the distributed hydrogen energy battery charging module uses the hydrogen electrolyzed by the electrolysis module to charge the distributed hydrogen energy battery; the main power grid charges the energy exchange station; the energy exchange station monitors the output power of the distributed hydrogen energy battery and the main power grid, and charges and discharges the distributed hydrogen energy battery and the main power grid; the main control console receives the power demand from the demand side, generates and sends control instructions to the energy exchange station, and controls the energy exchange station to charge and discharge the distributed hydrogen energy battery and the main power grid. The energy exchange station uses the electric energy of the main power grid to electrolyze hydrogen in the electrolysis module, and the hydrogen is transported to the distributed hydrogen energy battery charging module to charge the distributed hydrogen energy battery, and the distributed hydrogen energy battery can undergo chemical reaction, and the generated electric energy can charge the main power grid. The present invention uniformly regulates all distributed hydrogen-containing energy storage cells within a certain area. Each distributed hydrogen-containing energy storage cell and its coverage area are regarded as a distributed hydrogen-containing energy storage cell. A number of distributed hydrogen-containing energy storage cells are arranged in a certain area. Each distributed hydrogen-containing energy storage cell is connected to an energy exchange station. The energy exchange station and the distributed hydrogen-containing energy storage cells are connected to form an energy flow network, thereby realizing power mutual assistance of the distributed hydrogen-containing energy storage cells. This is a new type of grid-connected operation mode, which is beneficial to on-site consumption of the distribution network.

[0033] refer to Figure 2 The energy exchange station of the present invention includes an energy interface module, an energy conversion module, an energy storage module, a data acquisition and exchange module, an energy monitoring module and a main control unit. The energy storage module is connected to the energy interface module through the energy conversion module. The energy interface module is used to connect the external distributed hydrogen energy battery and the main power grid. The energy monitoring module is used to obtain the operation information of the energy interface module, the distributed hydrogen energy battery and the main power grid and send it to the main control unit through the data acquisition and exchange module. The energy conversion module and the energy storage module exchange information with the main control unit through the data acquisition and exchange module, and the main control unit is electrically connected to the main control console.

[0034] The distributed hydrogen-containing energy storage unit of the present invention is provided with a power supply boundary, and the power supply boundary encloses the power supply range of the distributed hydrogen-containing energy storage unit. A plurality of distributed hydrogen-containing energy storage units are provided in a certain area.

[0035] The topological diagram of the power supply boundary of the present invention is circular, and at least one energy exchange station is provided between two adjacent distributed hydrogen-containing energy storage cells. The two adjacent energy exchange stations are connected through information channel communication. The distributed hydrogen-containing energy storage cells are provided with a plurality of energy channels, and the energy channels are connected to the energy exchange station for energy exchange between the distributed hydrogen-containing energy storage cells and the energy exchange station.

[0036] This embodiment also proposes a method for optimizing the dispatching of an energy microgrid containing hydrogen energy storage, which adopts the above-mentioned energy microgrid optimizing dispatching system containing hydrogen energy storage, and includes the following steps: S1, constructing a network topology diagram of distributed hydrogen-containing energy storage monomers in a target area, wherein the network topology diagram of distributed hydrogen-containing energy storage monomers includes a plurality of distributed hydrogen-containing energy storage monomers and an energy exchange station connecting the plurality of distributed hydrogen-containing energy storage monomers; S2, selecting all the distributed hydrogen-containing energy storage units with insufficient power and candidate distributed hydrogen-containing energy storage units with surplus power from the distributed hydrogen-containing energy storage units; the S2 of the present invention specifically includes the following steps: S201, obtaining the load power P and the maximum output power P of each distributed hydrogen energy storage unit within a certain period T MAX and remaining battery power; S202, select all maximum output powers P MAX The distributed hydrogen-containing energy storage unit with a power less than the load power P is used as the distributed hydrogen-containing energy storage unit with insufficient power; S203, calculating the predicted power Q=2TP within two cycles of other distributed hydrogen-containing energy storage cells except the distributed hydrogen-containing energy storage cell with insufficient power, and selecting the distributed hydrogen-containing energy storage cells whose predicted power Q is less than or equal to the remaining power as candidate distributed hydrogen-containing energy storage cells with surplus power.

[0037] S3, plans the power mutual assistance path according to the principle of passing through the least energy exchange station, so that the distributed hydrogen-containing energy storage cells with surplus power can supplement the power of the distributed hydrogen-containing energy storage cells with insufficient power.

[0038] The S3 of the present invention specifically comprises the following steps: S301, calculating the power difference P of each distributed hydrogen energy storage unit with insufficient power C , the calculation formula is as follows: P C =PP EB -a; Where: P EB is the rated output power of the distributed hydrogen energy storage unit with insufficient power; P is the load power of the distributed hydrogen energy storage unit; a is a compensation coefficient greater than 0, so that the power difference P C Smaller than the actual demand, to avoid excessive subsequent power compensation; S302, generating a transmission path from each of the insufficiently powered distributed hydrogen-containing energy storage cells to a single candidate with a surplus of powered distributed hydrogen-containing energy storage cell, and selecting a transmission path with the fewest energy exchange stations as the shortest path for the single insufficiently powered distributed hydrogen-containing energy storage cell; S303, integrating all transmission paths, and transmitting the power difference P from the distributed hydrogen energy storage unit with power surplus according to the shortest path C To the distributed hydrogen energy storage units with insufficient power.

[0039] Embodiment 3: This embodiment optimizes the optimization scheduling method based on Embodiment 1 and Embodiment 2, and proposes an energy microgrid optimization scheduling system containing hydrogen energy storage, referring to Figure 1 , including a distributed hydrogen-containing energy storage unit, equipped with a distributed hydrogen energy battery, an electrolysis module and a distributed hydrogen energy battery charging module. The distributed hydrogen energy battery outputs a certain power to supply power to the electrical equipment in its area; the electrolysis module uses the electric energy of the main power grid to electrolyze hydrogen; the distributed hydrogen energy battery charging module uses the hydrogen electrolyzed by the electrolysis module to charge the distributed hydrogen energy battery; the main power grid charges the energy exchange station; the energy exchange station monitors the output power of the distributed hydrogen energy battery and the main power grid, and charges and discharges the distributed hydrogen energy battery and the main power grid; the main control console receives the power demand from the demand side, generates and sends control instructions to the energy exchange station, and controls the energy exchange station to charge and discharge the distributed hydrogen energy battery and the main power grid. The energy exchange station uses the electric energy of the main power grid to electrolyze hydrogen in the electrolysis module, and the hydrogen is transported to the distributed hydrogen energy battery charging module to charge the distributed hydrogen energy battery, and the distributed hydrogen energy battery can undergo chemical reaction, and the generated electric energy can charge the main power grid. The present invention uniformly regulates all distributed hydrogen-containing energy storage cells within a certain area. Each distributed hydrogen-containing energy storage cell and its coverage area are regarded as a distributed hydrogen-containing energy storage cell. A number of distributed hydrogen-containing energy storage cells are arranged in a certain area. Each distributed hydrogen-containing energy storage cell is connected to an energy exchange station. The energy exchange station and the distributed hydrogen-containing energy storage cells are connected to form an energy flow network, thereby realizing power mutual assistance of the distributed hydrogen-containing energy storage cells. This is a new type of grid-connected operation mode, which is beneficial to on-site consumption of the distribution network.

[0040] refer to Figure 2The energy exchange station of the present invention includes an energy interface module, an energy conversion module, an energy storage module, a data acquisition and exchange module, an energy monitoring module and a main control unit. The energy storage module is connected to the energy interface module through the energy conversion module. The energy interface module is used to connect the external distributed hydrogen energy battery and the main power grid. The energy monitoring module is used to obtain the operation information of the energy interface module, the distributed hydrogen energy battery and the main power grid and send it to the main control unit through the data acquisition and exchange module. The energy conversion module and the energy storage module exchange information with the main control unit through the data acquisition and exchange module, and the main control unit is electrically connected to the main control console.

[0041] The distributed hydrogen-containing energy storage unit of the present invention is provided with a power supply boundary, and the power supply boundary encloses the power supply range of the distributed hydrogen-containing energy storage unit. A plurality of distributed hydrogen-containing energy storage units are provided in a certain area.

[0042] The topological diagram of the power supply boundary of the present invention is circular, and at least one energy exchange station is provided between two adjacent distributed hydrogen-containing energy storage cells. The two adjacent energy exchange stations are connected through information channel communication. The distributed hydrogen-containing energy storage cells are provided with a plurality of energy channels, and the energy channels are connected to the energy exchange station for energy exchange between the distributed hydrogen-containing energy storage cells and the energy exchange station.

[0043] This embodiment also proposes a method for optimizing the dispatching of an energy microgrid containing hydrogen energy storage, which adopts the above-mentioned energy microgrid optimizing dispatching system containing hydrogen energy storage, and includes the following steps: S1, constructing a network topology diagram of distributed hydrogen-containing energy storage monomers in a target area, wherein the network topology diagram of distributed hydrogen-containing energy storage monomers includes a plurality of distributed hydrogen-containing energy storage monomers and an energy exchange station connecting the plurality of distributed hydrogen-containing energy storage monomers; S2, selecting all the distributed hydrogen-containing energy storage units with insufficient power and candidate distributed hydrogen-containing energy storage units with surplus power from the distributed hydrogen-containing energy storage units; the S2 of the present invention specifically includes the following steps: S201, obtaining the load power P and the maximum output power P of each distributed hydrogen energy storage unit within a certain period T MAX and remaining battery power; S202, select all maximum output powers P MAX The distributed hydrogen-containing energy storage unit with a power less than the load power P is used as the distributed hydrogen-containing energy storage unit with insufficient power; S203, calculating the predicted power Q=2TP within two cycles of other distributed hydrogen-containing energy storage cells except the distributed hydrogen-containing energy storage cell with insufficient power, and selecting the distributed hydrogen-containing energy storage cells whose predicted power Q is less than or equal to the remaining power as candidate distributed hydrogen-containing energy storage cells with surplus power.

[0044] S3, plans the power mutual assistance path according to the principle of passing through the least energy exchange station, so that the distributed hydrogen-containing energy storage cells with surplus power can supplement the power of the distributed hydrogen-containing energy storage cells with insufficient power.

[0045] The S3 of the present invention specifically comprises the following steps: S301, calculating the power difference P of each distributed hydrogen energy storage unit with insufficient power C , the calculation formula is as follows: P C =PP EB -a; Where: P EB is the rated output power of the distributed hydrogen energy storage unit with insufficient power; P is the load power of the distributed hydrogen energy storage unit; a is a compensation coefficient greater than 0, so that the power difference P C Smaller than the actual demand, to avoid excessive subsequent power compensation; S302, generating a transmission path from each of the insufficiently powered distributed hydrogen-containing energy storage cells to a single candidate with a surplus of powered distributed hydrogen-containing energy storage cell, and selecting a transmission path with the fewest energy exchange stations as the shortest path for the single insufficiently powered distributed hydrogen-containing energy storage cell; S303, integrating all transmission paths, and transmitting the power difference P from the distributed hydrogen energy storage unit with power surplus according to the shortest path C To the distributed hydrogen energy storage units with insufficient power.

[0046] The S303 further includes the following steps: determining the rated output power P of the distributed hydrogen-containing energy storage unit with power surplus EY Is it greater than or equal to the power difference P C If so, the distributed hydrogen energy storage unit with surplus power is rated at output power P EY Output continuously for time t, where: t = TP C / P EY If not, the distributed hydrogen energy storage unit with surplus power will be rated at output power P EY The output is continuously output for a time T, and the energy exchange station closest to the distributed hydrogen energy storage unit with insufficient power continuously outputs supplementary power P for a time T J , where: P J =P C -P EY , and record the power shortage of the energy exchange station Qq = TP J , and charge it when the city power is in valley power, so that the charging amount is Qq.

[0047] Based on Example 1 and Example 2, this embodiment further considers the situation where the power difference is greater than the rated output power of the distributed hydrogen energy storage unit with power surplus, and directly calls the energy exchange station closest to the distributed hydrogen energy storage unit with insufficient power to supplement power, so as to avoid the situation where power supplement is insufficient.

Claims

1. An energy microgrid optimization dispatching system containing hydrogen energy storage, characterized in that: It includes several distributed hydrogen-containing energy storage cells and several energy exchange stations. The energy exchange stations are electrically connected to the main power grid and the distributed hydrogen-containing energy storage cells. The distributed hydrogen-containing energy storage cells include distributed hydrogen energy batteries and electrolysis modules. A distributed hydrogen energy battery charging module is connected between the distributed hydrogen energy batteries and the electrolysis cells. The energy exchange stations are electrically connected to the electrolysis modules and the distributed hydrogen energy battery charging modules. The energy exchange stations are connected to the main control console.

2. According to claim 1, an energy microgrid optimization dispatching system containing hydrogen energy storage is characterized in that: The distributed hydrogen-containing energy storage unit is provided with a certain power supply range, and a power supply boundary is formed within the power supply range.

3. The energy microgrid optimization dispatching system containing hydrogen energy storage according to claim 2 is characterized in that: The circuit topology of the power supply boundary is circular, at least one energy exchange station is provided between two adjacent distributed hydrogen-containing energy storage cells, the two adjacent energy exchange stations are connected for communication via an information channel, and energy is exchanged between the distributed hydrogen-containing energy storage cells and the energy exchange station via a number of energy channels.

4. An energy microgrid optimization dispatching system containing hydrogen energy storage according to any one of claims 1 to 3, characterized in that: The energy exchange station is provided with a main control unit electrically connected to the main control console; the main control unit is electrically connected to an energy monitoring module and an energy conversion module via a data acquisition and exchange module; the energy conversion module is electrically connected to an energy storage module; the energy storage module is electrically connected to the data acquisition and exchange module; the energy monitoring module and the energy conversion module are electrically connected to an energy interface module respectively; and the energy interface module is electrically connected to a distributed hydrogen-containing energy storage cell and a main power grid.

5. A method for optimizing and dispatching an energy microgrid containing hydrogen energy storage, using an energy microgrid optimizing and dispatching system containing hydrogen energy storage as claimed in claim 1, characterized in that: The following steps are involved: S1, constructing a network topology diagram connecting energy exchange stations and distributed hydrogen energy storage units in the target area; S2, selecting candidate distributed hydrogen-containing energy storage units with surplus power and distributed hydrogen-containing energy storage units with insufficient power in the network topology diagram; S3, using the distributed hydrogen energy storage units with surplus power to supplement the power of the main grid, and establishing a power mutual assistance path with the constraint of passing through the least energy exchange stations.

6. The method for optimizing the scheduling of a hydrogen-containing energy microgrid according to claim 5 is characterized in that: The S2 specifically includes the following steps: S201, obtaining the load power and maximum output power of each distributed hydrogen-containing energy storage unit within a set period; S202, selecting a distributed hydrogen-containing energy storage unit whose maximum output power is less than the load power as a distributed hydrogen-containing energy storage unit with insufficient power; S203, obtaining the remaining power of the remaining distributed hydrogen-containing energy storage cells, and screening out candidate distributed hydrogen-containing energy storage cells with surplus power according to the magnitude of the remaining power and the predicted power.

7. The method for optimizing the scheduling of a hydrogen-containing energy microgrid according to claim 6 is characterized in that: The S203 specifically includes the following steps: The predicted power of the remaining distributed hydrogen-containing energy storage cells within two set periods is calculated, and the distributed hydrogen-containing energy storage cells whose predicted power is less than or equal to the remaining power are selected as candidate distributed hydrogen-containing energy storage cells with power surplus.

8. The method for optimizing the scheduling of a hydrogen-containing energy microgrid according to claim 5 is characterized in that: The S3 specifically includes the following steps: S301, obtaining a power difference of a distributed hydrogen-containing energy storage unit with insufficient power; S302, selecting the shortest path from the distributed hydrogen energy storage unit with insufficient power and passing through the least energy exchange station to a single candidate distributed hydrogen energy storage unit with surplus power; S303, the distributed hydrogen-containing energy storage unit with surplus power outputs power consistent with the power difference to the distributed hydrogen-containing energy storage unit with insufficient power through the shortest path.

9. The method for optimizing the scheduling of a hydrogen-containing energy microgrid according to claim 8, characterized in that: The S302 specifically includes the following steps: Generate a transmission path from each of the insufficiently powered distributed hydrogen energy storage cells to a single candidate with a surplus of powered distributed hydrogen energy storage cell, and select the transmission path with the least number of energy exchange stations as the shortest path for the single insufficiently powered distributed hydrogen energy storage cell.

10. A method for optimizing the dispatch of an energy microgrid containing hydrogen energy storage according to claim 8 or 9, characterized in that: The S303 also includes the following steps: when the rated output power of the distributed hydrogen-containing energy storage cell with surplus power is less than the power difference, the energy exchange station closest to the distributed hydrogen-containing energy storage cell with insufficient power outputs supplementary power to the distributed hydrogen-containing energy storage cell with insufficient power, supplementary power = power difference - rated output power, and the power shortage of the energy exchange station is recorded, and the energy exchange station is charged when the city power is in valley power.

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