CN205193187U - Extra -high voltage TDC direct current protection verifying attachment - Google Patents

Abstract

The utility model discloses an ultra-high voltage TDC direct current protection inspection device, which comprises an industrial computer, a man-machine interface, a digital interface module, a signal generation module, a photoelectric conversion module, a power supply module and a power amplifier module. The man-machine interface is connected with the industrial computer, The industrial computer is connected with the digital interface module, the signal generation module, the photoelectric conversion module, the power supply module and the power amplifier module, and the corresponding inspection function of the TDC DC protection system is realized through the digital interface module. The utility model is an inspection and testing device specially developed for the UHV DC protection device, which overcomes the shortcomings that the traditional AC relay protection test device cannot provide special optical fiber data and DC protection function test system, and can complete the function calibration of the UHV DC protection device. It can standardize the inspection work of UHV DC protection and guide the regular inspection and maintenance of UHV TDC DC protection system.

Description

UHV TDC DC Protection Inspection Device

technical field

The utility model relates to an inspection and test device for power system protection, in particular to an inspection and test device for an ultra-high voltage TDC direct current protection system.

Background technique

The protection inspection and testing device commonly referred to in the field of power systems usually refers to a test instrument used for acceptance inspection and periodic inspection of relay protection devices in AC systems. Through the test of the instrument, the hardware and functions of the relay protection device can be verified, and based on this, it can be judged whether it is normal and whether it has the conditions for putting it into operation. The main functions of the protection inspection and testing device include AC analog test, zero drift inspection, protection function verification, input and output test, signal test and transmission test, etc. It is widely used in circuit breakers, transformers, lines, Inspection of relay protection equipment for generators and other equipment.

UHV TDC DC protection system is a protection system based on TDC platform developed for UHV DC transmission projects. Its operation reliability will directly affect the safety of UHV DC transmission system operation, which is of great importance. The UHV DC protection system is mainly a protection device for the UHV DC transmission system. It is different from the conventional AC relay protection system. Its main data signal is an optical fiber signal, and the analog signal of non-AC protection uses a conventional AC relay. The electrical protection inspection device cannot inspect and test it. At present, because there is no inspection and testing device suitable for the UHV TDC DC protection system, it is impossible to professionally and comprehensively test the reliability of the system and the functional integrity of each module, and there is a large risk of malfunction and refusal of the protection system, making There are huge operational risks and hidden dangers in the UHV DC transmission system.

Utility model content

The technical problem to be solved by the utility model is to provide a UHV TDC direct current protection inspection device to overcome the above-mentioned defects.

In order to solve the above-mentioned technical problems, the UHV TDC DC protection inspection device described in the utility model includes an industrial computer, a man-machine interface, a digital interface module, a signal generation module, a photoelectric conversion module, a power supply module and a power amplifier module. The interface is in contact with the industrial computer, and the industrial computer is connected with the digital interface module, signal generation module, photoelectric conversion module, power supply module and power amplifier module, and the corresponding inspection function of the TDC DC protection system is realized through the digital interface module.

The effect of main function module described in the utility model is as follows:

Human-machine interface module: through human-computer interaction, complete operations such as parameter input and test start-stop control, and finally realize various logic test functions of DC protection;

Digital interface module: Provided to the human-machine interface module to call, through FPGA (control of field programmable gate array), use PC104 bus to directly complete the read and write operations of the underlying hardware of the tester, and realize the digital signal generation of voltage and current;

Signal generation module: the main board component of the industrial computer sends the digital signal to the signal generation module, and the module converts the digital signal into an analog small signal output (0-10V) through the built-in DA (Digital to Analog);

Photoelectric conversion module: the measurement input of ultra-high voltage DC protection adopts the form of optical fiber, and the photoelectric conversion module OPTO52 is used to realize the conversion from small signal output (0-10V) to optical fiber output, so as to realize the output of optical signal to UHV TDC DC protection system;

Power module: Convert 220V AC voltage through AC-DC to generate multiple sets of 5V, 12V and other DC power signals, and provide DC working voltage for all hardware modules inside the device;

Power amplifier module: voltage and current power amplifier module, the power amplifier module converts and amplifies small signals through the built-in power amplifier, and outputs voltage and current in analog form.

The power supply module and power amplifier module are mainly used as the power input part of the device.

The UHV TDC DC protection inspection device described in the utility model is based on the traditional relay protection tester, and is equipped with a corresponding optical fiber transmission template for the hardware and functional characteristics of the UHV TDC DC protection system, and the developed photoelectric conversion interface Fully meet the optical fiber signal requirements of TDC protection, and at the same time, through the precise control of small signals, fully meet the optical signal size requirements of the UHV TDC DC protection system. Input the corresponding data, that is to say, it can complete the requirements of acceptance and fixed inspection such as function verification, analog quantity test, input and output test of the UHV DC protection device.

Beneficial effects of the utility model: the utility model is an inspection and testing device specially developed for UHV DC protection devices, which overcomes the shortcomings of traditional AC relay protection testing devices that cannot provide dedicated optical fiber data and DC protection function testing systems, and can standardize special High-voltage DC protection inspection work is used to guide the regular inspection and maintenance work of UHV TDC DC protection system.

Description of drawings

Fig. 1 is a schematic block diagram of the main working principle of the utility model;

Fig. 2 is a schematic diagram of the appearance and structure of the utility model (front);

Fig. 3 is a schematic diagram of the appearance structure of the utility model (above).

detailed description

Below in conjunction with accompanying drawing, the utility model is described in further detail.

The UHV TDC DC protection inspection device described in the utility model includes an industrial computer, a man-machine interface, a digital interface module, a signal generation module, a photoelectric conversion module, a power supply module, and a power amplifier module. The computer is connected with the digital interface module, the signal generation module, the photoelectric conversion module, the power supply module and the power amplifier module, and the corresponding inspection function of the TDC direct current protection system is realized through the said digital interface module.

Embodiment: each functional module described in the utility model is integrated in the housing 1 of the inspection device, the numeric keypad 2, the embedded laser mouse 3, the keyboard 4 and the 10.4-inch liquid crystal display screen 5, etc., constitute the man-machine interface together, and are arranged in the Check the front of the device, complete parameter input and test start-stop control and other operations through human-computer interaction, and finally realize various logic test functions of DC protection.

Sockets and switches are set on the inspection device, mainly as follows:

Optical fiber output interface 6: The measurement input of ultra-high voltage DC protection adopts the form of optical fiber, and the conversion of small signal output (0-10V) to optical fiber output is realized through OPTO52 inside the photoelectric conversion module;

Claims (1)

1. extra-high voltage TDC direct current protecting verifying attachment; it is characterized in that; described verifying attachment comprises industrial computer, man-machine interface, digital interface module, signal generation module, photoelectric conversion module, power module and power amplifier module; described man-machine interface and industrial computer contact; be connected with described digital interface module, signal generation module, photoelectric conversion module, power module and power amplifier module by industrial computer, realized the corresponding checking function of TDC DC protection system by described digital interface module.