CN213879285U

CN213879285U - Photovoltaic power plant SVG device serial optical fiber communication system

Info

Publication number: CN213879285U
Application number: CN202022154327.8U
Authority: CN
Inventors: 侯胜旺; 宋林林; 杜锋; 郑云玲
Original assignee: Shandong Windsun Electronics Science & Technology Co ltd
Current assignee: Shandong Windsun Electronics Science & Technology Co ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-08-03
Anticipated expiration: 2030-09-27

Abstract

The utility model discloses a serial fiber communication system of photovoltaic power station SVG device, including 1 SVG host computer and n SVG slave computers, n is more than or equal to 2; a serial optical fiber communication loop is formed between the SVG host and the SVG slave; the SVG host is used for generating a control signal for reactive compensation of each SVG device, the SVG host issues the control signal for reactive compensation to each SVG slave through a serial optical fiber communication loop, and the running state information of the SVG slave is fed back to the SVG host through the serial optical fiber communication loop. The utility model discloses a photovoltaic power plant SVG device serial fiber communication system has realized that the SVG host computer is to SVG from the sending of the reactive compensation control signal of machine to and SVG from the running state feedback of machine to the SVG host computer, has solved the technical problem that current photovoltaic power plant SVG equipment model is non-uniform and can't realize the communication, provides technical support for photovoltaic power plant's dilatation.

Description

Photovoltaic power plant SVG device serial optical fiber communication system

Technical Field

The utility model relates to a photovoltaic power plant SVG device serial fiber communication system, more specifically say that, especially relate to a reactive power compensator of different models forms the photovoltaic power plant SVG device serial fiber communication system of serial fiber communication return circuit through optic fibre.

Background

With the continuous improvement of the economic development level of China, the power industry is greatly developed, the power consumption requirements of industry and residents are continuously increased, and the requirements of a power grid power transmission and distribution system on the quality of electric energy are higher and higher. Meanwhile, the ratio of clean energy in the whole power application is higher and higher, and as one of the clean energy, a photovoltaic power station is used as a power generation system which can be connected with a power grid to transmit power and transmit power, and in order to enable the photovoltaic power station to be stably connected into the power grid, SVG is needed to control the voltage and the reactive power of the power grid in the power station. Meanwhile, along with the expansion of the power transmission line, the whole capacity of the photovoltaic power station is also larger and larger, the SVG of the photovoltaic power station needs to be correspondingly increased in capacity while the photovoltaic power station is expanded, and meanwhile, because a plurality of SVG equipment manufacturers exist in the photovoltaic power station, the problem of how to connect communication by the communication control of the SVG equipment of a plurality of manufacturers after the SVG equipment is expanded or new equipment is added is solved. If the problem of the communication mode can not be solved, certain hidden danger exists in the follow-up SVG adjustment and extension in the photovoltaic power station.

To the above problem, the utility model relates to a be used for photovoltaic power plant SVG device serial fiber communication networking mode, it adopts the serial connection communication mode through unified standard communication mode, uses quartz fiber to connect, adopts principal and subordinate control between equipment to reach the reliable communication of different producer SVG equipment and controlled operation requirement.

Disclosure of Invention

The utility model discloses an overcome above-mentioned technical problem's shortcoming, provide a photovoltaic power plant SVG device serial fiber communication system.

The utility model discloses a serial optical fiber communication system of a photovoltaic power station SVG device, which comprises 1 SVG host and n SVG slave machines, wherein the SVG host is connected with a photovoltaic power station background control system; n is more than or equal to 2; the method is characterized in that: communication modules are arranged on the SVG host and the SVG slave machines, each communication module consists of a signal processor, and an optical fiber receiving port and an optical fiber transmitting port which are connected with the signal processor, the optical fiber receiving ports and the optical fiber transmitting ports of two adjacent SVG slave machines, and the optical fiber receiving ports and the optical fiber transmitting ports of the two adjacent SVG host machines and the SVG slave machines are connected through optical fiber communication, and a serial optical fiber communication loop is formed between the SVG host and the SVG slave machines; the SVG host is used for generating a control signal for reactive compensation of each SVG device, the SVG host issues the control signal for reactive compensation to each SVG slave through a serial optical fiber communication loop, and the running state information of the SVG slave is fed back to the SVG host through the serial optical fiber communication loop.

The utility model discloses a serial fiber communication system of photovoltaic power plant SVG device, be provided with SVG host computer control chip in the SVG host computer, SVG host computer control chip carries out fiber communication connection through communication module and SVG slave computer, SVG host computer control chip is connected with photovoltaic power plant PT cabinet and photovoltaic power plant CT cabinet, and SVG host computer control chip acquires the voltage signal on the electric wire netting through photovoltaic power plant PT cabinet, acquires the current signal on the electric wire netting through photovoltaic power plant CT cabinet.

The utility model discloses a photovoltaic power plant SVG device serial fiber communication system, optic fibre is quartz fiber.

The utility model discloses a photovoltaic power plant SVG device serial fiber communication system, photovoltaic power plant backstage control system is connected with other equipment of photovoltaic power plant.

The utility model has the advantages that: the utility model discloses a photovoltaic power plant SVG device serial fiber communication system, through set up by signal processor on SVG host computer and SVG follow the machine, the optic fibre receiving port, the communication module that optic fibre launch port is constituteed, and follow machine through fiber connection with two adjacent SVG host computers or SVG host computer and SVG, make SVG host computer and SVG follow between the machine and formed serial fiber communication circuit, the SVG host computer has been realized to the sending of the reactive compensation control signal that SVG followed the machine, and the SVG follows the machine and feeds back to the running state of SVG host computer, through serial fiber communication, the technical problem that current photovoltaic power plant SVG equipment model is non-uniform and can't realize the communication has been solved, technical support is provided for the dilatation of photovoltaic power station, beneficial effect is showing.

Compared with the prior art, the utility model has beneficial effect and is embodied:

1. different SVG equipment only uses two optic fibre can guarantee the communication, and the communication interface that corresponds only has two interfaces, reduces the hardware design degree of difficulty.

2. After the SVG equipment of different manufacturers completes networking in the communication networking mode, the control selection of the host can be determined autonomously, and the convenience and the rapidness in the power station capacity expansion networking process are improved.

3. The equipment room is communicated by quartz optical fiber, so that the communication signal is not easily interfered by electromagnetic signals generated by other equipment in the power station, and the reliability of communication is improved.

4. Because of adopting the serial networking mode, the equipment in the loop is not limited, and the networking number of the equipment can be greatly increased on the premise of meeting the requirement of signal processing speed.

Drawings

Fig. 1 is a schematic diagram of a serial optical fiber communication system of a photovoltaic power station SVG device of the present invention;

fig. 2 is a schematic diagram of the connection between the SVG host and the SVG slave and the communication module according to the present invention;

FIG. 3 is the utility model discloses a schematic diagram that SVG host computer is connected with photovoltaic power plant PT cabinet and CT cabinet.

In the figure: 1 SVG host computer, 2 SVG follow the machine, 3 photovoltaic power plant backstage control system, 4 other equipment in photovoltaic power plant, 5 communication module, 6 signal processor, 7 optic fibre receiving ports, 8 optic fibre transmission ports, 9 photovoltaic power plant PT cabinet, 10 photovoltaic power plant CT cabinet, 11 SVG host computer control chip.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and examples.

As shown in fig. 1, the utility model discloses a photovoltaic power plant SVG device serial fiber communication system's schematic diagram, it comprises from machine 2 by 1 SVG host computer 1 and n (be 4 in the picture) SVG, and SVG host computer 1 is connected with photovoltaic power plant backstage control system 3, and photovoltaic power plant backstage control system 3 is connected with other equipment 4 of photovoltaic power plant. The SVG host 1 and the SVG slave machine 2 are both used for realizing reactive compensation, and due to the expansion of the photovoltaic power station, the models of reactive compensation devices (SVG) expanded in different stages may be different, so that normal communication between the reactive compensation devices cannot be realized. For solving this problem, the utility model discloses in the technical scheme who adopts set up communication module 5 at SVG host computer 1 and SVG from machine 2.

As shown in fig. 2, the utility model discloses a schematic diagram that the medium SVG host and the SVG slave are connected with the communication module, the communication module 5 is composed of a signal processor 6, and an optical fiber receiving port 7 and an optical fiber transmitting port 8 which are connected with the signal processor, the optical signal received by the optical fiber receiving port 7 is converted into an electric signal after being processed by the signal processor 6, and then is received by the SVG host 1 or the SVG slave 2; the electrical signals sent by the SVG host 1 or the SVG slave 2 are processed by the signal processor 6 and then converted into optical signals, and the optical signals are emitted out through the optical fiber emitting port 8.

The optical fiber receiving ports 7 and the optical fiber transmitting ports 8 of two adjacent SVG slave machines 2, and the SVG host 1 and the optical fiber receiving ports 7 and the optical fiber transmitting ports 8 of the corresponding SVG slave machines 2 are in communication connection through quartz optical fibers, so that a serial optical fiber communication loop is formed between the SVG host 1 and all the SVG slave machines 2, a reactive compensation control signal sent by the SVG host 1 is sent to each SVG slave machine 2 through the serial optical fiber communication loop, and the SVG slave machines 2 perform reactive compensation according to a received control signal; meanwhile, the self state information monitored by each SVG slave 2 is fed back to the SVG host 1 through a serial optical fiber communication loop.

As shown in fig. 3, give the utility model discloses a schematic diagram that SVG host computer and photovoltaic power plant PT cabinet and CT cabinet are connected is provided with SVG host computer control chip 11 in the SVG host computer 1 shown, and SVG host computer control chip 11 is connected with photovoltaic power plant CT cabinet 10 and photovoltaic power plant PT cabinet 9 from 2 optical fiber communication of SVG through communication module 5. The SVG host control chip 11 obtains a voltage signal of a power grid through the photovoltaic power station PT cabinet 9, obtains a current signal of the power grid through the photovoltaic power station CT cabinet 10, calculates reactive power required to be compensated according to the obtained voltage and current signals, and distributes the reactive power to the SVG host control chip and the SVG slave 2 to realize reactive power compensation.

Claims

1. A serial optical fiber communication system of a photovoltaic power station SVG device comprises 1 SVG host (1) and n SVG slave machines (2), wherein the SVG host is connected with a photovoltaic power station background control system (3); n is more than or equal to 2; the method is characterized in that: the SVG host and the SVG slave are both provided with communication modules (5), each communication module (5) consists of a signal processor (6), and an optical fiber receiving port (7) and an optical fiber transmitting port (8) which are connected with the signal processor, the optical fiber receiving ports and the optical fiber transmitting ports of two adjacent SVG slave machines, and the optical fiber receiving ports and the optical fiber transmitting ports of the two adjacent SVG host machines and the SVG slave machines are connected through optical fiber communication, and a serial optical fiber communication loop is formed between the SVG host and the SVG slave machine; the SVG host is used for generating a control signal for reactive compensation of each SVG device, the SVG host issues the control signal for reactive compensation to each SVG slave through a serial optical fiber communication loop, and the running state information of the SVG slave is fed back to the SVG host through the serial optical fiber communication loop.

2. The serial fiber optic communication system of photovoltaic power plant SVG device of claim 1, characterized in that: be provided with SVG host computer control chip (11) in SVG host computer (1), SVG host computer control chip carries out fiber communication through communication module (5) and SVG from machine (2) and is connected, SVG host computer control chip is connected with photovoltaic power plant PT cabinet (9) and photovoltaic power plant CT cabinet (10), and SVG host computer control chip acquires the voltage signal on the electric wire netting through photovoltaic power plant PT cabinet, acquires the current signal on the electric wire netting through photovoltaic power plant CT cabinet.

3. The serial optical fiber communication system of photovoltaic power station SVG device of claim 1 or 2, characterized in that: the optical fiber is a quartz optical fiber.