CN-121984193-A - Multi-spacecraft distributed energy storage consistency control method

CN121984193ACN 121984193 ACN121984193 ACN 121984193ACN-121984193-A

Abstract

A multi-spacecraft distributed energy storage consistency control method belongs to the field of spacecraft power control. The invention aims at the problems of energy and power coordination control when the battery capacity and the battery available power of each spacecraft in a spacecraft system are different. The method comprises the steps that when an unknown load is applied to a distributed system of a plurality of spacecrafts, a leader node of the distributed system calculates the total power of the current load according to the newly-increased output power of a node generating additional output power, and distributes output power for each node according to a power distribution coefficient, each node calculates the average energy storage SOC of the system in a distributed mode through information interaction of the energy storage SOCs among neighboring nodes based on the communication topology among the spacecrafts, and each node adjusts the output power according to the difference value of the average energy storage SOCs of the system and the self energy storage SOCs, so that the energy storage SOCs of all the nodes tend to be consistent, and energy storage consistency control is realized. The invention realizes the energy storage consistency control among spacecrafts.

Inventors

CHEN JIAN
CHEN TIANXING
YIN ZHI
CHEN XUEQIN
WU FAN
CAO XIBIN

Assignees

哈尔滨工业大学

Dates

Publication Date: 20260505
Application Date: 20260407

Claims (10)

1. The multi-spacecraft distributed energy storage consistency control method is characterized by comprising the following steps of: When an unknown load is applied to the distributed system of the multi-spacecraft, a leader node of the distributed system calculates the total power of the current load according to the newly-added output power of a node generating additional output power, and distributes the output power for each node according to a power distribution coefficient; Based on the inter-spacecraft communication topology, each node calculates and obtains the average energy storage SOC of the system in a distributed mode through the information interaction of the energy storage SOCs among neighboring nodes; and each node adjusts output power according to the difference value of the average energy storage SOC and the self energy storage SOC of the system, so that the energy storage SOCs of all the nodes tend to be consistent, and energy storage consistency control is realized.
2. The multi-spacecraft distributed energy storage consistency control method of claim 1, wherein the calculation method of the total power of the current load is as follows: , In the middle of For the total power of the load, For the total power of the initial load, For the newly increased output power of node i, The number of nodes to generate additional output power.
3. The method for controlling the consistency of distributed energy storage of a plurality of spacecraft according to claim 2, wherein the method for distributing the output power for each node is as follows: , In the middle of For the output power of the mth node, And (3) the power distribution coefficient of the mth node, wherein m=1, 2,3, and M are the total node number of the distributed system.
4. The method of claim 3, wherein the multi-spacecraft distributed energy storage consistency control is implemented by an adjacency matrix Representing the topology of the communication between the spacecraft, n=1, 2,3,; 0 is the definition degree of communication between nodes m and n Number of nodes connected to the mth node: 。
5. the method for controlling the consistency of distributed energy storage of a plurality of spacecraft according to claim 4, According to the degree of the mth node And the degree of the nth node And calculating a communication weight matrix, and calculating the average energy storage SOC of the system in a distributed mode based on the communication weight matrix.
6. The method for controlling the consistency of distributed energy storage of a plurality of spacecraft of claim 5, wherein the communication weight matrix is: , In the middle of Is a communication weight matrix between the mth node and the nth node.
7. The method for controlling the consistency of distributed energy storage of a plurality of spacecraft according to claim 6, Each node adjusts output power according to the dual variable, and the dual variable of the mth node is based on the output power of the m nodes Communication weight matrix between mth node and nth node And determining the difference value between the average energy storage SOC and the self energy storage SOC of the system.
8. The method for controlling the consistency of distributed energy storage of a plurality of spacecraft according to claim 7, wherein the method for calculating the dual variable of the mth node is as follows: , where k is the number of iterations, As the dual variable of the mth node for the kth iteration, In order to adjust the coefficient of the one, For the output power of the mth node for the kth iteration, In order to adjust the coefficient of the second, For the difference between the n-th node energy storage SOC and the average energy storage SOC of the system, And the difference value between the energy storage SOC of the mth node and the average energy storage SOC of the system is obtained.
9. The method for controlling the consistency of distributed energy storage of a plurality of spacecraft according to claim 8, Output power of the (k+1) th iteration (m) th node The method comprises the following steps: , In the middle of In order to adjust the coefficient of the power supply, And storing the SOC for the mth node.
10. The method for controlling the consistency of distributed energy storage of a plurality of spacecrafts according to claim 3, Power distribution coefficient The distribution coefficients are either average distribution coefficients or weighted distribution coefficients.

Description

Multi-spacecraft distributed energy storage consistency control method Technical Field The invention relates to a multi-spacecraft distributed energy storage consistency control method, and belongs to the field of spacecraft power supply control. Background With the progress of the aerospace technology, the load and the functions of the spacecraft are increasingly abundant, and the capacity of a power supply system of the spacecraft is correspondingly improved. With the emergence of application demands such as space stations, on-orbit docking and networking of a plurality of spacecrafts are indispensable for constructing a large-scale complex spacecraft system. After a plurality of spacecrafts are in-orbit butt-jointed and networking to form a system, the power supply system of each spacecraft also carries out networking power supply, so that the expansion of power and the overall management and comprehensive utilization of energy are realized, the supplementary supply of energy under faults is realized, and the reliability of the whole system is improved. Most of spacecraft energy storage units are lithium batteries, and a few of spacecraft energy storage units are nickel-hydrogen batteries. In the networking process of a plurality of spacecraft energy systems, the battery capacity and the battery available power carried by each spacecraft are different, so how to coordinate the energy and the power among the spacecraft becomes a key problem of reducing the battery loss and improving the running economy of the system. Disclosure of Invention Aiming at the problems of coordination control of energy and power when the battery capacity and the battery available power of each spacecraft in a spacecraft system are different, the invention provides a multi-spacecraft distributed energy storage consistency control method. The invention discloses a multi-spacecraft distributed energy storage consistency control method, which comprises the following steps: When an unknown load is applied to the distributed system of the multi-spacecraft, a leader node of the distributed system calculates the total power of the current load according to the newly-added output power of a node generating additional output power, and distributes the output power for each node according to a power distribution coefficient; Based on the inter-spacecraft communication topology, each node calculates and obtains the average energy storage SOC of the system in a distributed mode through the information interaction of the energy storage SOCs among neighboring nodes; and each node adjusts output power according to the difference value of the average energy storage SOC and the self energy storage SOC of the system, so that the energy storage SOCs of all the nodes tend to be consistent, and energy storage consistency control is realized. The method has the beneficial effects that the method applies the consistency algorithm of the distributed multi-agent, carries out targeted power distribution on the spacecrafts with different energy storage capacities and different discharge capacities, and realizes the energy storage consistency control among the spacecrafts. According to the method, the initial distribution of output power is carried out through the leader node, all nodes are locally optimized, and the distributed consistency control of the energy storage of the whole system is realized. The distributed information exchange is adopted, the average value of the system is iterated, the global information acquisition requirement is reduced, and the communication occupation is reduced. And the output power is adjusted inside the spacecraft by adopting a consistency control algorithm, so that the distributed optimization of the system is realized. The method is applicable to different communication topology types and has expansibility. Drawings FIG. 1 is a schematic diagram of a multi-spacecraft distributed energy networking in a multi-spacecraft distributed energy storage consistency control method of the present invention; FIG. 2 is a schematic diagram of a multi-spacecraft communication topology; FIG. 3 is a functional block diagram of a multi-spacecraft distributed energy storage consistency control according to the present invention; FIG. 4 is a schematic diagram of a system average SOC convergence procedure; FIG. 5 is a schematic diagram of the power allocation results of the method of the present invention weighted by capacity; FIG. 6 is a schematic diagram of leader node autonomous election scoring; fig. 7 is a flow diagram of a leader node. Detailed Description The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the