Charging pile reactive compensation cooperative control system

Abstract

A charging pile reactive power compensation cooperative control system comprises a main control board, a first DSP controller and a second DSP controller are arranged on the main control board, the first DSP controller is electrically connected with the second DSP controller, the output end of the first DSP controller is electrically connected with a power module driver used for reactive power compensation, and the charging pile reactive power compensation cooperative control system further comprises an acquisition module. The acquisition module is electrically connected with the input end of the first DSP controller. The acquisition module comprises a plurality of PTs and CTs which are used for acquiring system side voltage and current, compensation side voltage and current, and load side voltage and current. The second DSP controller is electrically connected with a cloud communication module, and the cloud communication module comprises a 4G module and an LORA module. According to the charging pile reactive compensation cooperative control system provided by the utility model, two signal processing chips are arranged, logic control and algorithm implementation are carried out separately, the overall computing power of equipment is increased, a cloud upload mode and a local area network mode coexist, and cooperative control in stations and cooperative work between the stations are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of reactive power compensation, in particular to a reactive power compensation cooperative control system for a charging pile. Background Art

[0002] At present, most of the reactive power compensation devices in charging stations are arranged in a centralized manner. This arrangement cannot solve the harmonics and reactive power interference between charging piles. It also cannot solve the problem of reactive current loss in the line. This centralized arrangement of reactive power compensation equipment only manages the power quality of the stations where it is arranged. The reactive power compensation devices between different stations are implemented in coordination and overall cloud control is carried out, which cannot be achieved by the existing reactive power compensation device control system. At the same time, the priorities of reactive power compensation, harmonic control, and three-phase imbalance of traditional reactive power compensation devices remain basically unchanged after setting. They are not suitable for occasions such as charging stations where load changes are relatively large, and the control system lacks an interconnection channel. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a charging pile reactive power compensation collaborative control system, which can solve the problem that the edge end of the existing charging station cannot coordinate control and the cloud cannot issue instructions.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a charging pile reactive power compensation coordinated control system, including a main control board, a first DSP controller and a second DSP controller are arranged on the main control board, the first DSP controller is electrically connected to the second DSP controller, the output end of the first DSP controller is electrically connected to the power module driver for reactive power compensation, and also includes a collection module, the collection module is electrically connected to the input end of the first DSP controller, and the collection module includes a plurality of PTs and CTs for collecting system side voltage and current, compensation side voltage and current, and load side voltage and current;

[0005] The second DSP controller is electrically connected to a cloud communication module, and the cloud communication module includes a 4G module and a LORA module.

[0006] Preferably, the 4G module and the LORA module are electrically connected to the MCU, and the MCU is electrically connected to the second DSP controller through an interface, and the 4G module and the LORA module are also connected to an antenna. The interface adopts a 485 or 232 interface.

[0007] Preferably, the power module driver includes four IGBT modules, and the IGBT modules are electrically connected to the output end of the second DSP controller.

[0008] Preferably, the second DSP controller is also electrically connected to the switch module.

[0009] The utility model provides a charging pile reactive power compensation collaborative control system, which is equipped with two signal processing chips, and performs logic control and algorithm implementation separately, thereby increasing the overall computing power of the equipment. The cloud upload mode and the local area network mode coexist, and coordinated control within the station and collaborative work between stations are realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the cloud communication module of the utility model;

[0013] Figure 3 This is a circuit schematic diagram of the power module driver of the utility model. DETAILED DESCRIPTION

[0014] like Figure 1 As shown, a charging pile reactive power compensation collaborative control system includes a main control board 1, on which a first DSP controller and a second DSP controller are arranged, the first DSP controller is electrically connected to the second DSP controller, the output end of the first DSP controller is electrically connected to a power module driver 5 for reactive power compensation, and also includes a collection module 4, the collection module 4 is electrically connected to the input end of the first DSP controller, and the collection module 4 includes a plurality of PTs and CTs for collecting system side voltage, current, compensation side voltage, current, load side voltage, current;

[0015] The second DSP controller is electrically connected to the cloud communication module 3 , and the cloud communication module 3 includes a 4G module 6 and a LORA module 7 .

[0016] Preferably, the PTs and CTs shown are each provided with 9, 3 for measuring the system side voltage, 3 for measuring the compensation side voltage, and 3 for measuring the load side voltage; 3 for measuring the system side current, 3 for measuring the compensation side current, and 3 for measuring the load side current.

[0017] Preferably, Figure 2 As shown, the 4G module 6 and the LORA module 7 are electrically connected to the MCU, and the MCU is electrically connected to the second DSP controller through the interface 9. The 4G module 6 and the LORA module 7 are also connected to the antenna 10. The interface 9 adopts a 485 or 232 interface.

[0018] Preferably, the power module driver 5 includes four IGBT modules, and the IGBT modules are electrically connected to the output end of the second DSP controller.

[0019] Preferably, the second DSP controller is also electrically connected to the switch module 2.

[0020] The main control board 1 adopts a dual DSP architecture, one DSP is used for calculation and the other is used for logic control. DSP1 collects the voltage and current signals collected by the acquisition module 4 and calculates them in DSP1 through the AD conversion chip. According to the active power and reactive power of the main circuit of the charging station, the reactive power that the reactive compensation device should output is calculated; the PWM signal is generated using the modulation wave, and the IGBT module is driven by the power module driver to realize voltage and current modulation, and realize reactive compensation and harmonic control capabilities.

[0021] like Figure 3 As shown in the figure, 11 is an optical isolation driver chip, 12 is a transistor, 13 is a driving resistor, and 14 is a soft-off capacitor. The power module driver is composed of an optically isolated signal voltage conversion module configured with a driving resistor and a capacitor. In order to increase the driving capability of the driver module, a push-pull circuit composed of a muscle-enhanced transistor at the back end of the optical isolation module is used to make the instantaneous current reach 20A, thereby meeting the needs of high-power IGBT module driving.

[0022] The cloud communication module integrates 4G network and LORA wireless communication, and communicates with the main control board through the serial port. The LORA module realizes the construction of a local area network, which can achieve coordinated control of multiple reactive compensation devices in the station; the 4G network can upload the data of the main control board to the cloud background to realize cloud control.

[0023] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A charging pile reactive power compensation coordinated control system, comprising a main control board (1), characterized in that: A first DSP controller and a second DSP controller are provided on the main control board (1), the first DSP controller is electrically connected to the second DSP controller, the output end of the first DSP controller is electrically connected to a power module driver (5) for performing reactive power compensation, and also includes a collection module (4), the collection module (4) is electrically connected to the input end of the first DSP controller, the collection module (4) includes a plurality of PTs and CTs for collecting system side voltage and current, compensation side voltage and current, and load side voltage and current; The second DSP controller is electrically connected to a cloud communication module (3), and the cloud communication module (3) comprises a 4G module (6) and a LORA module (7).

2. According to claim 1, a charging pile reactive power compensation coordinated control system is characterized in that: The 4G module (6) and the LORA module (7) are electrically connected to the MCU, and the MCU is electrically connected to the second DSP controller via an interface (9). The 4G module (6) and the LORA module (7) are also connected to the antenna (10).

3. According to claim 1, a charging pile reactive power compensation coordinated control system is characterized in that: The power module driver (5) comprises four IGBT modules, and the IGBT modules are electrically connected to the output end of the second DSP controller.

4. According to claim 1, a charging pile reactive power compensation coordinated control system is characterized in that: The second DSP controller is also electrically connected to the switch module (2).

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