CN205643556U - Multi -functional power distribution terminal integrated test system - Google Patents

Abstract

A multi-functional power distribution terminal comprehensive test system, including a power supply, a feeder terminal, and a host computer; the power supply is connected to the power supply end of the feeder terminal; the output end of the feeder terminal is connected to the host computer; it also includes a comprehensive test device for the feeder terminal; The feeder terminal comprehensive test device includes a PLC core control unit, an environment monitoring unit, and a power consumption measurement unit; the inputs of the PLC core control unit are respectively connected to the environment monitoring unit and the power consumption measurement unit; the outputs of the PLC core control unit are respectively connected to The feeder terminal and the upper computer; the input of the power consumption measurement unit is connected to the power supply. The utility model realizes that the multifunctional power distribution terminal comprehensive test system can jointly control peripheral test instruments such as standard sources and relay protection testers, and realizes the automatic, integrated and networked detection mode of power distribution automation equipment, which can be used for three remote control of power distribution terminals , SOE, fault identification and other functional tests, one-click automatic report generation.

Description

Multifunctional power distribution terminal comprehensive test system

technical field

The utility model relates to a multifunctional power distribution terminal comprehensive testing system.

Background technique

Distribution automation terminals (including feeder terminal FTU and station terminal DTU) are installed on the medium voltage distribution network site. It cooperates with the switchgear in the distribution network to realize distribution network information collection, status monitoring, fault detection, positioning and isolation, and ensure the safe, economical and reliable operation of the distribution network. It is an important component in distribution network automation . There are many suppliers of power distribution monitoring terminal equipment in China, many batches, equipment levels are uneven, and the operating conditions are unstable. Effective technical supervision methods are urgently needed to standardize and newly put into operation power distribution monitoring terminals. Automated, whole-process testing and testing to ensure perfect functions and good performance of network-connected equipment and systems. At present, most of the tests on power distribution terminals are carried out manually, and the test equipment is also varied. Most of them use the test tools of the remote terminal unit (RTU) of the substation to test the telemetry function, and use the switch simulator to test the remote signaling and remote control functions. The test methods are scattered and simple, affected by human factors, the test accuracy and efficiency are very low, and there is no condition for joint commissioning and testing of distribution automation systems on site.

The existing detection technology is that after the test wiring is completed, the tester needs to manually operate the standard source to output the required parameters such as AC voltage, AC current, harmonics, frequency, DC voltage, etc., and then from the matching debugging of the power distribution terminal under test The software or maintenance software reads the telemetry data, reads the measured value output by the standard source from the standard table, and obtains the corresponding error according to the error calculation method. Similarly, when performing remote control testing, the debugging software will issue remote control commands, record the response of the switch simulator, and test the correct rate of remote control execution; The software reads the remote signaling parameters and calculates the correct rate of remote signaling. This technology has the disadvantages of difficult work, large amount of data, cumbersome calculation, slow test speed, and many human errors, and testers need to be familiar with the debugging software of different manufacturers and different types of power distribution terminals, which is not easy to popularize and apply. At the same time, due to the lack of software and hardware of traditional detection technology, it is impossible to test parameters related to time (such as event resolution in the station) and conduct on-site joint debugging tests. In response to these shortcomings, the utility model designs a multi-functional power distribution terminal comprehensive test system based on technologies such as the fully automatic trusteeship detection technology of multi-state virtual quantity injection, and the distribution network simulation detection technology of multi-machine dual-mode distributed collaborative control, so as to realize distribution Fully automatic testing, data analysis, and result analysis of 9 categories, up to 133 detailed items, such as the three-remote function of the electrical terminal, loop power consumption, insulation performance, and communication protocols, and one-click generation of reports. At the same time, the miniaturization of the test system can be realized, and the normal state and fault state of various distribution network lines can be simulated on site, and then the joint debugging test of the distribution automation system can be carried out, which can effectively solve the problems caused by the traditional test technology.

Contents of the invention

In order to solve the above problems, the utility model provides a multifunctional power distribution terminal comprehensive testing system.

The utility model is realized by adopting the following technical solutions: a multifunctional power distribution terminal comprehensive test system, characterized in that: it includes a power supply, a feeder terminal, a host computer and a feeder terminal comprehensive test device; the power supply is connected to the power supply end of the feeder terminal; The output end of the feeder terminal is connected to the upper computer; the output of the feeder terminal comprehensive test device is respectively connected to the feeder terminal and the upper computer;

The feeder terminal comprehensive testing device includes a PLC core control unit, an environment monitoring unit, and a power consumption measurement unit; the inputs of the PLC core control unit are respectively connected to the environment monitoring unit and the power consumption measurement unit; the outputs of the PLC core control unit are respectively connected to the feeder terminal and the upper computer; the input of the power consumption measurement unit is connected to the power supply.

In an embodiment of the utility model, the PLC core control unit includes a PLC and a standard meter module, a switch input and output unit, a touch screen, a satellite timing module, an environmental monitoring unit, and a fault identification unit respectively connected to the PLC.

Further, the programmable controller PLC includes a master CPU and a slave CPU.

Compared with the prior art, the technical solution of the utility model has the following effective technical effects: the multifunctional power distribution terminal comprehensive test system can jointly control peripheral test instruments such as standard sources and relay protection testers, and realize the automation of power distribution automation equipment, The integrated and networked detection mode can be used for functional tests such as three remotes, SOE, and fault identification of power distribution terminals. One-click automatic generation of reports solves the problem of single test methods, many manual interventions, and low test accuracy and efficiency in the original technology. question. The device also has advanced functions such as satellite timing, environmental monitoring, wireless communication, etc., coupled with a small and portable design, it is very suitable for on-site testing. The capabilities of technical services such as feasibility study evaluation, bidding inspection, network access sampling test, field test, system joint debugging, equipment rating, quality tracking, failure analysis, and decommissioning evaluation have broad application value.

Description of drawings

Fig. 1 is a schematic diagram of a comprehensive test system for a multifunctional power distribution terminal of the present invention.

Fig. 2 is a schematic diagram of the principle of the PLC core control unit of the utility model.

detailed description

The utility model will be further explained below in conjunction with the accompanying drawings and specific embodiments.

A multifunctional power distribution terminal comprehensive test system, including a power supply, a feeder terminal, a host computer and a feeder terminal comprehensive test device; the power supply is connected to the power supply end of the feeder terminal; the output end of the feeder terminal is connected to the host computer; The output of the test device is respectively connected to the feeder terminal and the upper computer; the feeder terminal comprehensive test device includes a PLC core control unit, an environment monitoring unit, and a power consumption measurement unit; the inputs of the PLC core control unit are respectively connected to the environment monitoring unit, power consumption measurement unit; the output of the PLC core control unit is respectively connected to the feeder terminal and the host computer; the input of the power consumption measurement unit is connected to the power supply; PLC is the core control unit for receiving commands from the host computer, controlling the standard source, and the relay protection tester Output and read standard table data, communicate with the touch screen, obtain the power consumption of the terminal and the temperature and humidity of the test environment; and use the I/O of the PLC to realize the remote signaling and remote control function test of the feeder monitoring terminal. See Figure 1 for the specific schematic diagram.

Further, the PLC core control unit includes a PLC and a standard meter module connected to it respectively, a switch input and output unit, a touch screen, a satellite timing module, an environmental monitoring unit, and a fault identification unit; the main function of the PLC is to receive control commands from the host computer , control standard source output, read standard meter data, receive time service module time calibration, communicate with touch screen and manage and control switch input and output ports; standard meter integrates high-precision standard meter, providing two ways of transformer input and clamp meter input , to adapt to different test scenarios of laboratory virtual load method test and on-site real load method test. The collected standard electrical parameters are transmitted to the host computer information processing software through PLC and communication module to provide standard values for error calculation; the switch input and output unit is Analog circuit breaker unit, including the following functions: automatic collection of remote signals, output of remote control functions, output of switch opening and closing status, execution of switch remote control relay output, through the I/O port of the PLC inside the comprehensive test device, automatic reading of the terminal Remote signal displacement information, SOE resolution, program-controlled output switching value displacement information, analog output remote control displacement; touch screen is used for displaying standard table data, setting of some standard source commands, setting of PLC digital output port, and digital input Display of port status, and receive terminal power consumption and ambient temperature and humidity data and transmit them to PLC; satellite timing module uses GPS/Beidou dual-mode timing module to correct time, which ensures the accuracy of time correction and realizes on-site synchronization failure Simulation function; the environmental monitoring unit contains a temperature and humidity measurement module to record the test environment, the touch screen and the host computer use the reading temperature and humidity data of the measurement module, and can describe and display it in graphic form; the fault identification unit uses a comprehensive test device, multiple Microcomputer relay protection tester, circuit breaker simulation device and additional simulation protection device, when the line is not powered off, inject the signal source into the FTU and DTU current loops of multiple tested feeders, and simulate the fault trip signal of the protection circuit breaker at the same time, Test the fault identification function of the terminal equipment, switchgear and master station system of the distribution automation system. See Figure 2 for the block diagram.

The above are the preferred embodiments of the utility model, and all changes made according to the technical solution of the utility model, when the functional effect produced does not exceed the scope of the technical solution of the utility model, all belong to the protection scope of the utility model.

Claims (3)

1. a multifunctional ligand electric terminals integrated test system, it is characterised in that: include power supply, line feed terminals, host computer and line feed terminals comprehensive test device；Power supply is connected with the feeder ear of line feed terminals；The outfan of line feed terminals is connected with host computer；The output of line feed terminals comprehensive test device connects line feed terminals and host computer respectively；

Described line feed terminals comprehensive test device includes PLC key control unit, environmental monitoring unit, measurement of power loss unit；The input of described PLC key control unit T-Ring border monitoring means, measurement of power loss unit respectively；The output of described PLC key control unit connects line feed terminals and host computer respectively；The input of described measurement of power loss unit connects power supply.

Multifunctional ligand electric terminals integrated test system the most according to claim 1, it is characterised in that: described PLC key control unit includes programmable controller PLC and the most coupled standard scale module, On-off signal output unit, touch screen, satellite time transfer module, Environment Monitor Unit, fault identification unit.

Multifunctional ligand electric terminals integrated test system the most according to claim 2, it is characterised in that: described programmable controller PLC includes that a host CPU and is from CPU.