CN-121984036-A - Intelligent ordered load control device for charging station

CN121984036ACN 121984036 ACN121984036 ACN 121984036ACN-121984036-A

Abstract

The invention belongs to the technical field of electric automobile charging facilities, in particular to an intelligent ordered load management and control device for a charging station, which comprises a load acquisition module, an intelligent ordered controller, a communication module and a charging pile interface adaptation module, wherein the safety is remarkably improved; the dynamic power distribution algorithm adapts to load change, the average utilization rate of the charging pile is improved by 30-40%, the power supply resource waste is avoided, the user experience is optimized, the priority strategy guarantees important user demands, the active adjustment ensures charging continuity, the user complaint rate is reduced by more than 60%, the operation cost is reduced, the full-flow automatic management and control is reduced by 80%, the manual monitoring cost is reduced, the equipment maintenance cost is reduced by 25-30%, the compatibility is strong, the existing station equipment can be directly docked, large-scale transformation is not needed, the deployment cost is low, and the popularization is strong.

Inventors

SHAO QI
HU ZHENGSHENG
FU JIANJIAN
Yue Qiuyue

Assignees

中科全速智能科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260126

Claims (6)

1. The intelligent ordered load management and control device for the charging station is characterized by comprising a load acquisition module, an intelligent ordered controller, a communication module and a charging pile interface adaptation module; The load acquisition module adopts a high-precision three-phase intelligent ammeter, is connected in series at the low-voltage outlet side of the box and is connected with the intelligent ordered controller in a bidirectional way through an RS485 communication interface, is used for acquiring the data of the total load power, the three-phase current and the voltage of the box and supports 1-10Hz adjustable sampling frequency; the intelligent ordered controller adopts an industrial ARMCortex-A9 processor, is provided with a 2GBDDR memory and a 16GBFlash memory, integrates an analog input interface, a digital input/output interface and a plurality of types of communication interfaces, and is internally provided with a power management module for receiving data of a load acquisition module, running a load prediction algorithm and a power distribution algorithm and generating a power regulation instruction; The communication module integrates a plurality of communication modes of RS485, ethernet and 4G/5G, wi-Fi, integrates a protocol conversion module, supports Modbus-RTU, TCP/IP and MQTT protocols, has one end connected with the intelligent ordered controller and the other end connected with the charging pile interface adaptation module; The charging pile interface adapting module is used for designing standardized interface adapting units aiming at alternating current and direct current charging piles of different brands and models, supporting CAN bus, RS485 and other protocol analysis and conversion, and is connected with the charging pile clusters one to one and used for issuing power adjusting instructions and feeding back the real-time state of the charging pile.
2. The intelligent ordered load control device of the charging station according to claim 1, wherein a load prediction algorithm built in the intelligent ordered controller adopts an LSTM long-term and short-term memory network model, and is combined with historical load data, reserved charging information of a charging pile, time period characteristics and weather data to predict a box transformer load peak value of 5-15 minutes in the future, and a prediction error is controlled within +/-5%.
3. The intelligent ordered load control device for the charging station according to claim 1, wherein a built-in power distribution algorithm of the intelligent ordered controller sets 80% of rated capacity of the box transformer as an early warning threshold value and 90% as a safety threshold value, and executes a three-stage control strategy: When the real-time load rate is less than 80%, all the charging piles operate according to the maximum rated power; When the real-time load rate is 80 percent or less and is less than 90 percent, starting dynamic power distribution, and distributing the residual capacity according to the real-time charging requirement of the charging pile; When the real-time load rate is more than or equal to 90% or the predicted load peak value is more than or equal to 90%, priority adjustment is started, rated power operation of the high-priority charging pile is guaranteed, and the low-priority charging pile is powered down or suspended.
4. The intelligent ordered load management and control device for the charging station of claim 1, wherein the high-priority charging pile comprises a special pile for emergency vehicles and a reserved user occupation pile, and the low-priority charging pile is a temporary user occupation pile.
5. The method for controlling the load of a charging station according to any one of claims 1 to 4, comprising the steps of.
S1, powering up and initializing the device, and acquiring box variable load data by a load acquisition module according to a set sampling frequency; s2, the intelligent ordered controller carries out Kalman filtering pretreatment on the acquired data, and calculates a real-time load rate; s3, predicting a load peak value of 5-15 minutes in the future by the intelligent ordered controller through an LSTM model; s4, the intelligent ordered controller judges a threshold interval to which the load state belongs according to the real-time load rate and the predicted peak value; S5, the intelligent ordered controller executes a corresponding power allocation strategy to generate an adjusting instruction; S6, the communication module issues the adjusting instruction to each charging pile through the charging pile interface adapting module; S7, the charging pile executes the instruction and feeds back the real-time state to the intelligent ordered controller; s8, repeating the steps S1-S7 to realize closed loop control.

Description

Intelligent ordered load control device for charging station Technical Field The invention relates to the technical field of electric automobile charging facilities, in particular to an intelligent ordered load management and control device for a charging station. Background With the rapid increase of the storage capacity of new energy automobiles, the charging station is used as a high-load electricity utilization node, and the large-scale application of the charging station causes increasingly outstanding power grid adaptation problems. In the prior art, a single-dimension regulation strategy is adopted for charging station load control, for example, power primary cut limitation is carried out only according to the load limit of a power grid, or the charging time-efficiency requirement of a user is simply met, so that the contradiction between the safety of the power grid and the user experience and the operation income is difficult to reconcile. In the prior art 1, a charging pile management and control scheme based on fixed power distribution is adopted, namely, the maximum output power upper limit of each charging pile is preset (for example, 120kW charging piles are limited to 80kW operation), so that the total power of all the charging piles does not exceed the capacity of a box transformer when all the charging piles simultaneously operate, but the problems of overhigh cost, overhigh error rate, environmental protection, low reaction speed and incapability of realizing a certain function exist in the patent. In the prior art 2, a passive control scheme based on box transformer tripping feedback is adopted, namely an overload protection switch is arranged on the box transformer outlet side, when the total load exceeds the rated capacity, the protection switch automatically trips to cut off power supply, and after the load descends, the power supply is restored by manual closing, but the power parameter static configuration exists in the patent, and the power parameter static configuration cannot be dynamically adjusted according to the actual load, so that the utilization rate of the charging pile is low. For example, when part of the charging piles are not used, the residual capacity cannot be fully utilized by other charging piles, so that power supply resource waste is caused, and when a plurality of charging piles are started at the same time, the problem of overload caused by the fact that the upper limit of power is broken is still likely. In the prior art 3, the control scheme-the technical scheme based on the background manual intervention is that box-type transformer substation load data is displayed in real time through a background management system, when the load is close to a threshold value, a worker issues a shutdown or power reduction instruction to a part of charging piles through 4G/5G communication, but the problems that the response speed is slow, the delay of 10-30 seconds exists, the situation that the load cannot be quickly increased cannot be dealt with, the labor cost is high, special personnel are required to carry out 24-hour conservation, overload risks are easily caused by human negligence, and the control reliability is low are solved. Disclosure of Invention Aiming at the defects of the prior art, the invention provides an intelligent and orderly load control device for a charging station, which solves the problems of over-high cost, over-high error rate, environmental protection, low response speed and incapability of realizing a certain function, and the utilization rate of a charging pile is low due to dynamic adjustment according to actual load. For example, when part of the charging piles are not used, the residual capacity cannot be fully utilized by other charging piles, so that power supply resource waste is caused, and when a plurality of charging piles are started simultaneously, overload caused by the upper limit of power can still be broken, a scene that the load can not be quickly increased can not be met, the labor cost is high, special persons are required to watch for 24 hours, overload risks are easily caused by human negligence, and the management and control reliability is low. The intelligent ordered load management and control device for the charging station comprises two parts, namely a hardware module and a software algorithm, wherein the structure and the connection mode of each module are as follows: Load acquisition module The high-precision three-phase intelligent ammeter with the model number of DTZY1352-Z is adopted, the error level is 0.2S level, the voltage, current, power and energy consumption parameter acquisition functions are integrated, and an electromagnetic interference prevention module is provided. The module is connected in series at the low-voltage outlet side of the box transformer substation and is connected with the intelligent ordered controller in a bidirectional mode through an RS485 communication interface, supports 1-10