Ground station multipath load intelligent power distribution system and power distribution method

Abstract

The invention discloses a ground station multipath load intelligent power distribution system and a power distribution method. The system comprises a power supply module, a Hall voltage sensor, a single-chip microcomputer, an AD acquisition module, an input / output relay, a Hall current sensor and a master control module. Data receiving, transmitting, analyzing, storing and updating of input voltage and load current are achieved through the input measurement and control module and the load measurement and control module. Through acquisition and judgment of the main control module, the functions of input / load multichannel on-off execution, fault reporting of open phase, overvoltage, undervoltage and the like are realized, and an intelligent power distribution strategy is generated. By using the design method provided by the invention, the design cost can be effectively reduced; the load can be automatically distributed to a three-phase power supply; the method can achieve the quick and simultaneous power-on and power-off of multiple loads in a short time, can record a load curve, updates a power distribution strategy in time, and can adapt to various power distribution scenes.

Description

Technical Field

[0001] This invention belongs to the technical field of ground station power distribution, specifically relating to a ground station multi-load intelligent power distribution system and power distribution method. Background Technology

[0002] As the flight control center, the ground station needs to ensure its stable and safe operation, which means ensuring safe and reasonable power distribution. Traditional ground station power distribution devices mainly achieve intelligent startup of multiple loads by setting delay durations and pre-configuring power-on sequences. This power distribution mode requires pre-calculating the power consumption of all loads, manually allocating the load conditions of each phase of the three-phase power supply, determining the power-on sequence of the loads, and still empirically setting delay durations to achieve the function of sequential delayed power-on of multiple loads.

[0003] Under the actual operating environment requirements of ground stations, rapid deployment and simultaneous power-on of equipment are necessary. Current technologies suffer from problems such as time-consuming load power consumption calculations, complex manual load distribution processes, slow equipment startup with delayed power-on, and the possibility of tripping due to excessive inrush current caused by short delay time settings, making it difficult to meet the needs of safe and rapid power distribution for ground stations.

[0004] Therefore, in view of the above-mentioned problems in the power distribution process of ground stations in the prior art, the present invention discloses a ground station multi-load intelligent power distribution system and power distribution method. Summary of the Invention

[0005] This invention discloses a ground station multi-load intelligent power distribution system and power distribution method, which can reliably judge the quality of input power supply, and can realize the function of simultaneous and rapid power-on and power-off of multiple loads through the main control module. It can record the load current curve and update the power distribution strategy in a timely manner, which can meet the needs of various power distribution application scenarios such as rapid power-on and deployment of ground stations in combat environments.

[0006] This invention is achieved through the following technical solution: A ground station multi-load intelligent power distribution system includes a main control module, an input measurement and control module, and a load measurement and control module connected together. The input measurement and control module includes several Hall voltage sensors connected to the load, and the Hall voltage sensors are connected to the main control module through input contactor control coils. The load measurement and control module includes several Hall current sensors connected to the load, and the Hall current sensors are connected to the main control module through output relay control coils. The main control module is used to receive power-on commands and record the power-on current curves of the loads. The main control module generates power-on and power-off strategies based on the power-on current curves.

[0007] To better realize the present invention, the input measurement and control module further includes a contactor drive module, a contact AD module, and a first microcontroller. The first microcontroller is connected to a Hall voltage sensor through the contact AD module, the first microcontroller is connected to the input contactor control coil through the contactor drive module, and the first microcontroller is connected to the main control module.

[0008] To better realize the present invention, the load measurement and control module further includes a relay drive module, a load AD module, and a second microcontroller. The second microcontroller is connected to the Hall current sensor through the load AD module, the second microcontroller is connected to the output relay control coil through the relay drive module, and the second microcontroller is connected to the main control module.

[0009] To better realize the present invention, it further includes a power supply module, which is connected to the main control module, the input measurement and control module, and the load measurement and control module.

[0010] A method for intelligent power distribution of multiple loads at a ground station includes the following steps: Step 1: Collect power module data through the main control module to determine the working status of the power module. If the power module is normal, proceed to step 2. If the power module is abnormal, control the input contactor to control the coil to disconnect the load connection. Step 2: Input power parameters and threshold values. The main control module connects part of the load according to the power-on command and records the power-on current curve of part of the load through the Hall current sensor. After the connected part of the load stabilizes, the remaining load is connected to the minimum load phase. Step 3: The main control module records the power-on current curve of the three-phase load and generates power-on and power-off strategies.

[0011] To better realize the present invention, step 2 further includes: Step 2.1: Distribute part of the load to the three phases of the three-phase power supply and determine whether the three-phase load currents meet the first approximate equality principle. If they do, maintain the current load distribution; otherwise, proceed to step 2.2. Step 2.2: Power off the loads one by one, and arrange the loads in descending order of their stable operating current; Step 2.3: Select the three loads with the largest current and connect them to the three phases respectively, then connect the remaining loads to the phase with the smallest load.

[0012] To better realize the present invention, the first approximate equality principle in step 2.1 is further defined as follows: ; in: This indicates the total load current of phase A; This indicates the total load current of phase B; This indicates the total current of the C-phase load; This indicates the adjustment parameter.

[0013] To better realize the present invention, step 3 further includes: Step 3.1: Identify all currently connected loads through the main control module; Step 3.2: The main control module extracts the power-on current curves of all loads in the current phase; Step 3.3: Perform multivariate fitting on the power-on current curves of all loads in the current phase to obtain the fitted current curves; Step 3.4: Set the impact current threshold and generate power-on / off strategies for the current phase based on the condition that the fitted current curve does not exceed the impact current threshold.

[0014] To better realize the present invention, further, in step 3.4, the power-on strategy with the shortest power-on time is selected as the optimal load power-on strategy.

[0015] To better realize the present invention, the fitted current curve is further defined as follows: ; Where: y represents the fitted current curve; - Indicates the coefficients of the current curve; - Indicates the peak time of the current curve; - Represents the number of integer steps; - Indicates the current offset; Indicates the time step.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: (1) This invention effectively reduces the difficulty of circuit design by designing a multi-load intelligent power distribution method. The main control module is responsible for functions such as load power consumption calculation, load distribution for each phase power supply, setting delay time, and power-on sequence of the loads. It does not require a lot of manual calculation and avoids possible failures caused by experience-based settings. (2) The present invention significantly improves the speed and reliability of powering on multiple loads. It can calculate the feasible solution for powering on multiple loads quickly and stably in the shortest time based on the main control module, control the time to the millisecond level, and effectively reduce the possibility of tripping caused by excessive inrush current when powering on at the same time. (3) The present invention can record the load curve in real time and update it continuously, and update the intelligent power distribution method in sync with the update log to avoid equipment aging and sudden changes in inrush current, which affect the safety of power distribution. (4) The present invention has strong scalability. Through the calculation of the main control module, the communication of CAN bus, and the data acquisition of the load measurement and control module, the load can be increased or decreased, and new power distribution methods can be automatically updated in a timely manner. Attached Figure Description

[0017] Figure 1 A schematic diagram of the circuit architecture of a multi-load intelligent power distribution system for a ground station. Figure 2 A flowchart illustrating the workflow of the input measurement and control module; Figure 3 This is a schematic diagram of the workflow of the load measurement and control module.

[0018] Wherein: 1-Input contactor; 2-Output relay switch contact; 3-Input contactor control coil; 4-Output relay control coil. Detailed Implementation

[0019] Example 1: This embodiment presents a ground station multi-load intelligent power distribution system, such as... Figure 1 As shown, the system includes a power supply module, a main control module, an input measurement and control module, and a load measurement and control module connected together. The power supply module is connected to the main control module, the input measurement and control module, and the load measurement and control module.

[0020] The input measurement and control module includes several Hall voltage sensors connected to the load. The Hall voltage sensors are connected to the main control module through an input contactor control coil. The load measurement and control module includes several Hall current sensors connected to the load. The Hall current sensors are connected to the main control module through an output relay control coil. The main control module is used to receive power-on commands and record the power-on current curve of the load. The main control module generates power-on and power-off strategies based on the power-on current curve.

[0021] Furthermore, the input measurement and control module includes a contactor drive module, a contact AD module, and a first microcontroller. The first microcontroller is connected to a Hall voltage sensor through the contact AD module, the first microcontroller is connected to the input contactor control coil through the contactor drive module, and the first microcontroller is connected to the main control module.

[0022] Furthermore, the load measurement and control module includes a relay drive module, a load AD module, and a second microcontroller. The second microcontroller is connected to a Hall current sensor through the load AD module, the second microcontroller is connected to the output relay control coil through the relay drive module, and the second microcontroller is connected to the main control module.

[0023] A smart power distribution method for multiple loads at a ground station, such as Figure 2 and Figure 3 As shown, it includes the following steps: Step 1: Collect power module data through the main control module to determine the working status of the power module. If the power module is normal, proceed to step 2. If the power module is abnormal, control the input contactor to control the coil to disconnect the load connection. Step 2: Input power parameters and threshold values. The main control module connects part of the load according to the power-on command and records the power-on current curve of part of the load through the Hall current sensor. After the connected part of the load stabilizes, the remaining load is connected to the minimum load phase. Step 3: The main control module records the power-on current curve of the three-phase load and generates power-on and power-off strategies.

[0024] Furthermore, step 2 specifically includes: Step 2.1: Distribute part of the load to the three phases of the three-phase power supply and determine whether the three-phase load currents meet the first approximate equality principle. If they do, maintain the current load distribution; otherwise, proceed to step 2.2. Step 2.2: Power off the loads one by one, and arrange the loads in descending order of their stable operating current; Step 2.3: Select the three loads with the largest current and connect them to the three phases respectively, then connect the remaining loads to the phase with the smallest load.

[0025] Furthermore, the first approximate equality principle in step 2.1 specifically refers to: ; in: This indicates the total load current of phase A; This indicates the total load current of phase B; This indicates the total current of the C-phase load; This indicates the adjustment parameter.

[0026] Furthermore, step 3 specifically includes: Step 3.1: Identify all currently connected loads through the main control module; Step 3.2: The main control module extracts the power-on current curves of all loads in the current phase; Step 3.3: Perform multivariate fitting on the power-on current curves of all loads in the current phase to obtain the fitted current curves; Step 3.4: Set the impact current threshold and generate power-on / off strategies for the current phase based on the condition that the fitted current curve does not exceed the impact current threshold.

[0027] Furthermore, in step 3.4, the power-on / off strategy with the shortest power-on time is selected as the optimal load power-on strategy.

[0028] Furthermore, the fitted current curve is specifically as follows: ; Where: y represents the fitted current curve; - Indicates the coefficients of the current curve; - Indicates the peak time of the current curve; - Represents the number of integer steps; - Indicates the current offset; Indicates the time step.

[0029] Example 2: This embodiment discloses a smart power distribution method for multiple loads at a ground station, which is an optimization based on Embodiment 1, specifically as follows: The Hall voltage sensor collects data from the three-phase power supply and reports it to the main control module. The main control module sequentially checks whether the input three-phase power supply has a missing phase or overvoltage / undervoltage. If any of these phenomena are found, it issues a corresponding warning and shuts off the input contactor. Upon receiving a power-on command from the host computer, the main control module sends a power-on command even when the power is not on, controlling the input contactor control coil to open the input contactor and complete the power-on startup of the input power supply.

[0030] After inputting the three-phase power supply parameters and various threshold values, the main control module receives the power-on command and simultaneously connects load 1, load 2, and load 3 in the load monitoring and control module to phases A, B, and C of the three-phase power supply, respectively, and records the power-on current curves. Once load 1, load 2, and load 3 are operating stably, the remaining loads connected to the load monitoring and control module are sequentially connected to the least loaded phase. Based on the recorded current parameter table, the main control module generates a power-on / off strategy and de-energizes the loads. Upon re-energizing, the main control module can select whether to automatically power on based on the power-on / off strategy. Each time a load is energized, the main control module records the power-on current curve and synchronously generates a new power-on / off strategy.

[0031] Load 1, load 2, ..., load N are distributed to phases A, B, and C respectively, ensuring that the three-phase load currents in phases A, B, and C are approximately equal, i.e.: ; in: This indicates the total load current of phase A; This indicates the total load current of phase B; This indicates the total current of the C-phase load; This indicates the adjustment parameter.

[0032] If the total load currents of phase A, phase B, and phase C cannot satisfy the first approximate equality principle, then first de-energize the loads one by one, record the currents I1-IN when loads 1 to N are operating stably, and rearrange I1-IN from largest to smallest. Select the three loads with the largest operating currents and connect them to phases A, B, and C respectively. Then connect the remaining loads to the phases with the smallest load distribution in sequence, and determine whether the three-phase currents satisfy the first approximate equality principle.

[0033] If the first approximate equality principle still cannot be satisfied, then the adjustment parameter needs to be adjusted. The adjustments are as follows: ; in: This indicates the adjusted adjustment parameters; This represents the original adjustment parameter; T is the adjustment constant.

[0034] Once the three-phase currents satisfy the first approximate equality principle, the power-on / off strategy can be calculated for each phase. For example, for loads 1 to M connected in phase A, the power-on / off strategy is calculated as follows: The current curves of load 1 to load M connected to phase A, recorded by the main control module, are fitted to obtain the following current curves: ; Where: y represents the fitted current curve; - Indicates the coefficients of the current curve; - Indicates the peak time of the current curve; - Represents the number of integer steps; - Indicates the current offset; Indicates the time step. Determined by Shannon's theorem.

[0035] When the load is powered on, the inrush current in the fitted current curve must not exceed the set inrush current threshold, and the following conditions must be met: ; in: Indicates the inrush current threshold; This represents the adjustment constant.

[0036] If the above conditions are met, there are L possible power-on schemes for phase A load: ; The power-on / off strategies for phase B loads and phase C loads are similar.

[0037] Then, the optimal power-on strategy for phase A is selected, and the power-on strategy with the shortest power-on time is chosen as the optimal load power-on strategy, specifically: ; Similarly, the optimal power-on strategy for phase B load and the optimal power-on strategy for phase C load can be determined.

[0038] The rest of this embodiment is the same as that of Embodiment 1, so it will not be described again.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A ground station multi-load intelligent power distribution system, characterized in that, The system includes a main control module, an input measurement and control module, and a load measurement and control module. The input measurement and control module includes several Hall voltage sensors connected to the load, and the Hall voltage sensors are connected to the main control module via input contactor control coils. The load measurement and control module includes several Hall current sensors connected to the load, and the Hall current sensors are connected to the main control module via output relay control coils. The main control module is used to receive power-on commands and record the power-on current curve of the load. The main control module generates power-on and power-off strategies based on the power-on current curve.

2. The intelligent power distribution system for multiple loads at a ground station according to claim 1, characterized in that, The input measurement and control module includes a contactor drive module, a contact AD module, and a first microcontroller. The first microcontroller is connected to a Hall voltage sensor through the contact AD module, the first microcontroller is connected to the input contactor control coil through the contactor drive module, and the first microcontroller is connected to the main control module.

3. The intelligent power distribution system for multiple loads at a ground station according to claim 2, characterized in that, The load measurement and control module includes a relay drive module, a load AD module, and a second microcontroller. The second microcontroller is connected to a Hall current sensor through the load AD module, the second microcontroller is connected to the output relay control coil through the relay drive module, and the second microcontroller is connected to the main control module.

4. The intelligent power distribution system for multiple loads at a ground station according to claim 3, characterized in that, It also includes a power supply module, which is connected to the main control module, the input measurement and control module, and the load measurement and control module.

5. A method for intelligent power distribution of multiple loads at a ground station, implemented based on the power distribution system described in any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Collect power module data through the main control module to determine the working status of the power module. If the power module is normal, proceed to step 2. If the power module is abnormal, control the input contactor to control the coil to disconnect the load connection. Step 2: Input power parameters and threshold values. The main control module connects part of the load according to the power-on command and records the power-on current curve of part of the load through the Hall current sensor. After the connected part of the load stabilizes, the remaining load is connected to the minimum load phase. Step 3: The main control module records the power-on current curve of the three-phase load and generates power-on and power-off strategies.

6. The intelligent power distribution method for multiple loads at a ground station according to claim 5, characterized in that, Step 2 specifically includes: Step 2.1: Distribute part of the load to the three phases of the three-phase power supply and determine whether the three-phase load currents meet the first approximate equality principle. If they do, maintain the current load distribution; otherwise, proceed to step 2.

2. Step 2.2: Power off the loads one by one, and arrange the loads in descending order of their stable operating current; Step 2.3: Select the three loads with the largest current and connect them to the three phases respectively, then connect the remaining loads to the phase with the smallest load.

7. The intelligent power distribution method for multiple loads at a ground station according to claim 6, characterized in that, The first approximate equality principle in step 2.1 is specifically as follows: ； in: This indicates the total load current of phase A; This indicates the total load current of phase B; This indicates the total current of the C-phase load; This indicates the adjustment parameter.

8. The intelligent power distribution method for multiple loads at a ground station according to claim 7, characterized in that, Step 3 specifically includes: Step 3.1: Identify all currently connected loads through the main control module; Step 3.2: The main control module extracts the power-on current curves of all loads in the current phase; Step 3.3: Perform multivariate fitting on the power-on current curves of all loads in the current phase to obtain the fitted current curves; Step 3.4: Set the impact current threshold and generate power-on / off strategies for the current phase based on the condition that the fitted current curve does not exceed the impact current threshold.

9. A method for intelligent power distribution of multiple loads at a ground station according to claim 8, characterized in that, In step 3.4, the power-on strategy with the shortest power-on time is selected as the optimal load power-on strategy.

10. A method for intelligent power distribution of multiple loads at a ground station according to claim 9, characterized in that, The fitted current curve is specifically as follows: ； Where: y represents the fitted current curve; - Indicates the coefficients of the current curve; - Indicates the peak time of the current curve; - Represents the number of integer steps; - Indicates the current offset; Indicates the time step.

Images