CN202351399U

CN202351399U - Control device capable of simulating short circuit current of direct current breaker for photovoltaic inverter

Info

Publication number: CN202351399U
Application number: CN2011204856291U
Authority: CN
Inventors: 徐淑法; 穆加路
Original assignee: Changzhou Giantion Optoelectronics Industry Development Co Ltd
Current assignee: Changzhou Giantion Optoelectronics Industry Development Co Ltd
Priority date: 2011-11-30
Filing date: 2011-11-30
Publication date: 2012-07-25
Anticipated expiration: 2021-11-30

Abstract

The utility model belongs to the field of photovoltaic solar inverter, and in particular relates to a control device capable of simulating short circuit current of a direct current breaker for a photovoltaic inverter. The control device comprises a power supply, a direct current breaker, a transistor, a single chip microcomputer and an environment detection module, wherein the power supply supplies power to the direct current breaker, the direct current breaker is connected with the transistor and the single chip microcomputer, the single chip microcomputer is connected with the transistor, the environment detection module is connected with the single chip microcomputer, the direct current breaker transmits a response signal of the direct current breaker to the single chip microcomputer, the environment detection module transmits a detected ambient temperature signal to the single chip microcomputer, and corresponding parameters of the short circuit current of the direct current breaker in corresponding environment can be obtained through signal processing by a MCU (Microprogrammed Control Unit). The control device provided by the utility model has the advantages that loading of the short circuit current of the direct current breaker in equipment such as the photovoltaic inverter and a direct current cabinet can be continuously simulated, the response signal of the direct current breaker can be timely captured, and reliability of the breaker can be effectively verified.

Description

But photovoltaic DC-to-AC converter is with the control device of analog DC circuit breaker short circuit electric current

Technical field

The utility model belongs to photovoltaic solar inverter field, but specifically is the control device of a kind of photovoltaic DC-to-AC converter with analog DC circuit breaker short circuit electric current.

Background technology

Consumption along with earth resources; People begin to pay attention to the development and use of regenerative resource; Advantages such as solar energy photovoltaic system is environment friendly and pollution-free, renewable because of it, do not receive the region restriction, potentiality to be exploited is big obtain the generally attention of each country, and in the Future Society, sun power will become main energy source; The electric energy that solar power system produces is a direct current; Must pass through inverter and be converted into and just can output in the grid-connected system after the alternating current, therefore, the design of high-power combining inverter is the important judgement symbol that photovoltaic plant is built success or failure.The performance of DC side isolating switch is the important indicator that high-power combining inverter power improves, and the dc circuit breaker that adheres to specification is high-power combining inverter design conditions for successful, especially on the security performance of short-circuit protection, requires even more important.

Summary of the invention

The problem that the utility model will solve is to be directed against dc circuit breaker when doing short-circuit test; Usually change method of current through the resistance switching; Complicated and the Current Control of its control can not continuously adjustable shortcoming; But the control device of photovoltaic DC-to-AC converter with analog DC circuit breaker short circuit electric current is provided, and it uses the MCU oxide-semiconductor control transistors, can realize the continuous adjustable controlled of electric current.More careful observing intuitively the actual value of short-circuit current and the time of dc circuit breaker response.

The utility model provides following technical scheme:

But photovoltaic DC-to-AC converter is with the control device of analog DC circuit breaker short circuit electric current; It comprises power supply, dc circuit breaker, transistor and single-chip microcomputer and environment detection module, and power supply is the dc circuit breaker power supply, and dc circuit breaker connects transistor and single-chip microcomputer; Single-chip microcomputer is connected with transistor; The environment measuring module is connected with single-chip microcomputer, and dc circuit breaker passes to single-chip microcomputer with its response signal, and the environment detection module passes to single-chip microcomputer with the ambient temperature signal of surveying; Handle through MCU, draw the short-circuit current relevant parameter of dc circuit breaker under the respective environment.

Described single-chip microcomputer is the MCU single-chip microcomputer.

The loading of the short-circuit current of the dc circuit breaker in the equipment such as the utility model has the advantages that can the continuous analog photovoltaic DC-to-AC converter, direct current cabinet; In time catch the dc circuit breaker response signal; Effectively verify the reliability of isolating switch, this system assembles is simple, need on DC equipment, not simulate by loading current; Can with the common mimic-disconnecting switch condition of work of environmental laboratory, for DC side Equipment Design such as photovoltaic DC-to-AC converter provide reliable foundation.

Embodiment

Fig. 1 is the structural representation of the utility model.

Embodiment

As shown in Figure 1, but photovoltaic DC-to-AC converter is used the control device of analog DC circuit breaker short circuit electric current, and it comprises power supply 1, dc circuit breaker 2, transistor 3 and single-chip microcomputer 4 and environment detection module 5; Power supply is the dc circuit breaker power supply; Dc circuit breaker connects transistor and single-chip microcomputer, and single-chip microcomputer is connected with transistor, and the environment measuring module is connected with single-chip microcomputer; Dc circuit breaker passes to single-chip microcomputer with its response signal; The environment detection module passes to single-chip microcomputer with the ambient temperature signal of surveying, and handles through MCU, draws the short-circuit current relevant parameter of dc circuit breaker under the respective environment.

Wherein, single-chip microcomputer 4 is the MCU single-chip microcomputer.

Come the size and the time of Control current through MCU Single-chip Controlling transistor.

Claims

1. but photovoltaic DC-to-AC converter is with the control device of analog DC circuit breaker short circuit electric current; It is characterized in that: it comprises power supply, dc circuit breaker, transistor and single-chip microcomputer and environment detection module, and power supply is the dc circuit breaker power supply, and dc circuit breaker connects transistor and single-chip microcomputer; Single-chip microcomputer is connected with transistor; The environment measuring module is connected with single-chip microcomputer, and dc circuit breaker passes to single-chip microcomputer with its response signal, and the environment detection module passes to single-chip microcomputer with the ambient temperature signal of surveying; Handle through MCU, draw the short-circuit current relevant parameter of dc circuit breaker under the respective environment.

2. but photovoltaic DC-to-AC converter according to claim 1 is with the control device of analog DC circuit breaker short circuit electric current, and it is characterized in that: described single-chip microcomputer is the MCU single-chip microcomputer.