Power supply method for large-scale digital phased-array antenna

Abstract

The invention discloses a power supply method for large-scale digital phased-array antennas, and the method comprises the following steps: S1, constructing a power supply model of a large-scale digital phased array, the power supply model comprising a power distribution network, an energy storage system and a plurality of large-scale digital phased-array antennas, and the power supply modes comprise: a first power supply mode in which the power distribution network supplies power to each large-scale digital phased-array antenna, and a second power supply mode in which the power storage system supplies power to each large-scale digital phased-array antenna; meanwhile, the energy storage system is charged; in the second power supply mode, the power distribution network and the energy storage system jointly supply power to each large-scale digital phased array antenna; s2, dividing a power supply cycle into N time periods, and selecting a power supply mode in each time period based on the power supply price of the power distribution network in each time period; and S3, constructing a joint optimization problem based on loss and power supply cost according to the power supply mode and the power supply price in each time period, and obtaining a power supply scheme of the large-scale digital phased-array antenna by solving the joint optimization problem. According to the invention, the problems of power supply cost and overall power loss are considered at the same time, and the balance between cost reduction and loss reduction is realized.

Description

Technical Field

[0001] The invention relates to the field of phased arrays, and in particular to a power supply method for a large-scale digital phased array antenna. Background Art

[0002] Digital phased arrays precisely control the antenna's beam pointing and forming in a digital way. Compared with traditional phased array antennas, it has the advantages of small size and low cost. When multiple large-scale digital phased arrays need to be deployed in a working area, the cost issue needs to be considered due to the large power consumption. The electricity price during the peak period and the valley period of the distribution network are very different. Therefore, an energy storage system can be set up in the area to store electricity when the electricity price is high and to provide coordinated power supply when the electricity price is low. However, in general, the direct power supply loss of the distribution network is much less than the loss of charging the energy storage system first and then supplying power to the energy storage system. Therefore, if the power supply plan is determined without considering the loss, it is impossible to achieve more accurate cost control. At the same time, the current energy storage system power supply plan only considers its own cost issues, without considering the overall power waste, which will cause a large power supply burden on the distribution network's distribution system. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art, provide a power supply method for a large-scale digital phased array antenna, construct a joint optimization problem based on loss and power supply cost, and obtain a power supply scheme for a large-scale digital phased array antenna by solving the joint optimization problem. At the same time, the power supply cost and the overall power loss are taken into account, achieving a balance between reducing costs and reducing losses.

[0004] The object of the present invention is achieved through the following technical solution: A power supply method for a large-scale digital phased array antenna, characterized in that it includes the following steps:

[0005] S1. Build a power supply model for a large-scale digital phased array, including a distribution network, an energy storage system, and multiple large-scale digital phased array antennas. The power supply methods include:

[0006] Power supply method 1: The distribution network supplies power to each large-scale digital phased array antenna and charges the energy storage system at the same time;

[0007] Power supply method 2: The distribution network and energy storage system jointly power each large-scale digital phased array antenna;

[0008] S2. Divide a power supply cycle into N time periods, and select the power supply mode in each time period based on the power supply price of the distribution network in each time period;

[0009] S3. According to the power supply mode and power supply price in each time period, a joint optimization problem based on loss and power supply cost is constructed, and the power supply solution for large-scale digital phased array antennas is obtained by solving the joint optimization problem.

[0010] The beneficial effects of the present invention are as follows: (1) the present invention constructs a joint optimization problem based on loss and power supply cost, and obtains a power supply scheme for a large-scale digital phased array antenna by solving the joint optimization problem, while taking into account the power supply cost and the overall power loss, thus achieving a balance between reducing costs and reducing losses;

[0011] (2) The present invention takes into account that the direct power supply loss of the distribution network is much smaller than the loss of charging the energy storage system first and then supplying power to the energy storage system. Therefore, a hypothetical situation is considered: assuming that the distribution network is based on the average power supply price After charging the energy storage system, it directly powers each large-scale digital phased array antenna to calculate the cost. Based on the real-time electricity price and the calculated cost, the threshold electricity price P0 under critical conditions is calculated, and the power supply plan is selected based on the relationship between the real-time electricity price and the threshold electricity price, which can achieve more accurate cost control. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is a flow chart of the method. DETAILED DESCRIPTION

[0013] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0014] like Figure 1 As shown, a power supply method for a large-scale digital phased array antenna includes the following steps:

[0015] S1. Build a power supply model for a large-scale digital phased array, including a distribution network, an energy storage system, and multiple large-scale digital phased array antennas. The power supply methods include:

[0016] Power supply method 1: The distribution network supplies power to each large-scale digital phased array antenna and charges the energy storage system at the same time;

[0017] Power supply method 2: The distribution network and energy storage system jointly power each large-scale digital phased array antenna;

[0018] S2. Divide a power supply cycle into N time periods, and select the power supply mode in each time period based on the power supply price of the distribution network in each time period;

[0019] The step S2 comprises:

[0020] S201. Assume that the actual electricity price of the distribution network in the nth time period in a power supply cycle is P n , n = 1, 2, ..., N, the actual electricity price refers to the actual electricity price per unit of electricity consumption; the loss rate of the given distribution network directly supplying power to the mth large-scale digital phased array antenna is δ m , m = 1, 2, ..., M, where M represents the number of large-scale digital phased array antennas; given that the loss rate of the distribution network charging the energy storage system is ε, where (1-δ m )>(1-ε)(1-ε m );

[0021] Given that the energy storage system supplies power to the mth large-scale digital phased array antenna, the loss rate is ε m , m=1,2,…,M; given that the power supply required by the mth large-scale digital phased array antenna in the nth time period is Q nm , n=1,2,…,N; m=1,2,…,M;

[0022] S202. Calculate the average power supply price in N time periods:

[0023]

[0024] S203. For the nth time period, determine the power supply mode:

[0025] (1) Assume that the distribution network uses the average power supply price After charging the energy storage system, the energy storage system directly powers each large-scale digital phased array antenna. The power supply cost C1 is calculated as:

[0026] First, calculate the amount of power that the energy storage system needs to provide to meet the power supply needs of each large-scale digital phased array antenna:

[0027]

[0028] Next, calculate the amount of electricity that the distribution network needs to output when charging the energy storage system Q1:

[0029] Q2=Q1 / (1-ε)

[0030] Calculate the cost of electricity supply:

[0031]

[0032] (2) Calculate the amount of power that the distribution network needs to provide when directly supplying power to each large-scale digital phased array antenna:

[0033]

[0034] (3) Assuming that the cost C3 of the distribution network directly supplying power to each large-scale digital phased array antenna is equal to the cost C1 of the energy storage system supplying power to each large-scale digital phased array antenna, calculate the critical threshold electricity price P0:

[0035] P0=C3 / Q3=C1 / Q3

[0036] (4) When the actual electricity price P in the nth time period n When it is greater than P0, the distribution network directly supplies power to each large-scale digital phased array antenna, which will cause the power supply cost to be greater than C1. At this time, the energy storage system should be used to provide part of the power to reduce the cost, so the power supply method 2 is adopted;

[0037] When the actual electricity price P n When it is not greater than P0, the distribution network directly supplies power to each large-scale digital phased array antenna, and the power supply cost is less than or equal to C1. At the same time, since the actual electricity price is lower, charging at this time can effectively save costs, and power supply method 1 is adopted.

[0038] The above scheme takes into account that the direct power supply loss of the distribution network is much smaller than the loss of charging the energy storage system first and then supplying power to the energy storage system. Therefore, a hypothetical situation is considered: assuming that the distribution network uses the average power supply price After charging the energy storage system, it directly powers each large-scale digital phased array antenna to calculate the cost. Based on the real-time electricity price and the calculated cost, the threshold electricity price P0 under critical conditions is calculated, and the power supply plan is selected based on the relationship between the real-time electricity price and the threshold electricity price, which can achieve more accurate cost control.

[0039] The cycle is 1 day, and each time period is 1 hour.

[0040] S3. According to the power supply mode and power supply price in each time period, a joint optimization problem based on loss and power supply cost is constructed, and the power supply solution for large-scale digital phased array antennas is obtained by solving the joint optimization problem.

[0041] By solving the joint optimization problem, a power supply scheme for a large-scale digital phased array antenna can be obtained, while considering the power supply cost and the overall power loss, to achieve a balance between reducing costs and reducing losses. Specifically, step S3 includes:

[0042] S301. Assume that the maximum capacity of the energy storage system is H, the initial power is 0.5H, and the power supply from the distribution network to the mth large-scale digital phased array antenna in the nth time period is The power supply from the distribution network to the energy storage system is The power supply from the energy storage system to the mth large-scale digital phased array antenna is n=1,2,…,N; m=1,2,…,M;

[0043] At the nth time period:

[0044] If the actual electricity price P n If the electricity price is not greater than the critical threshold price P0, the power supply method 1 is adopted: the distribution network directly supplies power to each large-scale digital phased array antenna and charges the energy storage system. is k1·H, then is 0; k1 represents the ratio coefficient of the charging amount to the maximum capacity each time the energy storage system is charged;

[0045] If the actual electricity price P n If the electricity price is greater than the critical threshold price P0, the second power supply method is adopted: the distribution network and the energy storage system are used together to power each large-scale digital phased array antenna, where the power supply of the energy storage system is is k2·H, at this time is 0; k2 represents the coefficient of the proportion of power supply to the maximum capacity each time the energy storage system is powered;

[0046] S302. Construct a joint optimization problem based on loss and power supply cost:

[0047]

[0048] in, It represents the total cost of supplying electricity in one cycle;

[0049] It represents the total power loss in one cycle;

[0050] α1 and α2 are preset weighting coefficients. The joint optimization needs to minimize the weighted sum of the total cost of power supply and the total power loss in one cycle.

[0051] Given the constraints of the above joint optimization problem:

[0052] (1) For any n = 1, 2, ..., N, m = 1, 2, ..., M, it satisfies That is, in each time period, the actual power supply of the distribution network and energy storage system to the mth large-scale digital phased array antenna is equal to the required power supply;

[0053] (2) For any n = 1, 2, ..., N, it satisfies That is, the power of the energy storage system in each time period is greater than or equal to 0 and less than or equal to H;

[0054] S303. Solve the above joint optimization problem, obtain k1 and k2 that meet the constraints, and obtain a joint optimized power supply solution based on loss and power supply cost:

[0055] When n=1,2,...,N, for the nth time period:

[0056] If the actual electricity price P n If the electricity price is not greater than the critical threshold price P0, the power supply method 1 is adopted: the distribution network supplies power to each large-scale digital phased array antenna, and charges the energy storage system at the same time, and the charging amount is k1·H;

[0057] If the actual electricity price P n If the electricity price is greater than the critical threshold price P0, the second power supply method is adopted: the distribution network and the energy storage system together power each large-scale digital phased array antenna, where the energy storage system supplies k2·H, and the remaining electricity is provided by the distribution network.

[0058] The above is a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A power supply method for a large-scale digital phased array antenna, characterized in that: The following steps are involved: S1. Build a power supply model for a large-scale digital phased array, including a distribution network, an energy storage system, and multiple large-scale digital phased array antennas. The power supply methods include: Power supply method 1: The distribution network supplies power to each large-scale digital phased array antenna and charges the energy storage system at the same time; Power supply method 2: The distribution network and energy storage system jointly power each large-scale digital phased array antenna; S2. Divide a power supply cycle into N time periods, and select the power supply mode in each time period based on the power supply price of the distribution network in each time period; S3. According to the power supply mode and power supply price in each time period, a joint optimization problem based on loss and power supply cost is constructed, and the power supply solution for large-scale digital phased array antennas is obtained by solving the joint optimization problem.

2. The power supply method for a large-scale digital phased array antenna according to claim 1, characterized in that: The step S2 comprises: S201. Assume that the actual electricity price of the distribution network in the nth time period in a power supply cycle is P n , n = 1, 2, ..., N, the actual electricity price refers to the actual electricity price per unit of electricity consumption; the loss rate of the given distribution network directly supplying power to the mth large-scale digital phased array antenna is δ m , m = 1, 2, ..., M, where M represents the number of large-scale digital phased array antennas; given that the loss rate of the distribution network charging the energy storage system is ε, where (1-δ m )>(1-ε)(1-ε m ); Given that the energy storage system supplies power to the mth large-scale digital phased array antenna, the loss rate is ε m , m=1,2,…,M; given that the power supply required by the mth large-scale digital phased array antenna in the nth time period is Q nm , n=1,2,…,N; m=1,2,…,M; S202. Calculate the average power supply price in N time periods: S203. For the nth time period, determine the power supply mode: (1) Assume that the distribution network uses the average power supply price After charging the energy storage system, the energy storage system directly powers each large-scale digital phased array antenna. The power supply cost C1 is calculated as: First, calculate the amount of power that the energy storage system needs to provide to meet the power supply needs of each large-scale digital phased array antenna: Next, calculate the amount of electricity that the distribution network needs to output when charging the energy storage system Q1: Q2=Q1 / (1-ε) Calculate the cost of electricity supply: (2) Calculate the amount of power that the distribution network needs to provide when directly supplying power to each large-scale digital phased array antenna: (3) Assuming that the cost C3 of the distribution network directly supplying power to each large-scale digital phased array antenna is equal to the cost C1 of the energy storage system supplying power to each large-scale digital phased array antenna, calculate the critical threshold electricity price P0: P0=C3 / Q3=C1 / Q3 (4) When the actual electricity price P in the nth time period n When it is greater than P0, the distribution network directly supplies power to each large-scale digital phased array antenna, which will cause the power supply cost to be greater than C1. At this time, the energy storage system should be used to provide part of the power to reduce the cost, so the power supply method 2 is adopted; When the actual electricity price P n When it is not greater than P0, the distribution network directly supplies power to each large-scale digital phased array antenna, and the power supply cost is less than or equal to C1. At the same time, since the actual electricity price is lower, charging at this time can effectively save costs, and power supply method 1 is adopted.

3. The power supply method for a large-scale digital phased array antenna according to claim 1, characterized in that: The cycle is 1 day, and each time period is 1 hour.

4. The power supply method for a large-scale digital phased array antenna according to claim 2, characterized in that: The step S3 comprises: S301. Assume that the maximum capacity of the energy storage system is H, the initial power is 0.5H, and the power supply from the distribution network to the mth large-scale digital phased array antenna in the nth time period is The power supply from the distribution network to the energy storage system is The power supply from the energy storage system to the mth large-scale digital phased array antenna is At the nth time period: If the actual electricity price P n If the electricity price is not greater than the critical threshold price P0, the power supply method 1 is adopted: the distribution network directly supplies power to each large-scale digital phased array antenna and charges the energy storage system. is k1·H, then is 0; k1 represents the ratio coefficient of the charging amount to the maximum capacity each time the energy storage system is charged; If the actual electricity price P n If the electricity price is greater than the critical threshold price P0, the second power supply method is adopted: the distribution network and the energy storage system are used together to power each large-scale digital phased array antenna, where the power supply of the energy storage system is is k2·H, at this time is 0; k2 represents the coefficient of the proportion of power supply to the maximum capacity each time the energy storage system is powered; S302. Construct a joint optimization problem based on loss and power supply cost: in, It represents the total cost of supplying electricity in a cycle; It represents the total power loss in one cycle; α1 and α2 are preset weighting coefficients. The joint optimization needs to minimize the weighted sum of the total cost of power supply and the total power loss in one cycle. Given the constraints of the above joint optimization problem: (1) For any n = 1, 2, ..., N, m = 1, 2, ..., M, it satisfies That is, in each time period, the actual power supply provided by the distribution network and energy storage system to the mth large-scale digital phased array antenna is equal to the required power supply; (2) For any n = 1, 2, ..., N, it satisfies That is, the power of the energy storage system in each time period is greater than or equal to 0 and less than or equal to H; S303. Solve the above joint optimization problem, obtain k1 and k2 that meet the constraints, and obtain a joint optimized power supply solution based on loss and power supply cost, that is: When n=1,2,...,N, for the nth time period: If the actual electricity price P n If the electricity price is not greater than the critical threshold price P0, the power supply method 1 is adopted: the distribution network supplies power to each large-scale digital phased array antenna, and at the same time charges the energy storage system, and the charging amount is k1·H; If the actual electricity price P n If the electricity price is greater than the critical threshold price P0, the second power supply method is adopted: the distribution network and the energy storage system together power each large-scale digital phased array antenna, where the energy storage system supplies k2·H, and the remaining electricity is provided by the distribution network.

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