CN213279273U

CN213279273U - Transformer intelligent terminal

Info

Publication number: CN213279273U
Application number: CN202021469016.4U
Authority: CN
Inventors: 杨辉; 李忠明; 王梦胜; 邢小双; 练盛雄
Original assignee: ZHUHAI COMKING ELECTRIC CO Ltd
Current assignee: ZHUHAI COMKING ELECTRIC CO Ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-05-25
Anticipated expiration: 2030-07-23

Abstract

The utility model discloses a transformer wisdom terminal, include: the data acquisition unit is used for detecting and outputting phase current and phase voltage; the control unit receives the acquired data information of the data acquisition unit and outputs a control instruction; an action unit for executing the control instruction of the control unit; the display unit is embedded at the display window and displays the detection and action states; the self-checking protection unit is used for comparing the phase current/phase voltage with a preset threshold value to realize timing turn-off, zero sequence protection and overvoltage protection; the alarm unit is used for alarming and outputting when a non-electric quantity signal and PT disconnection abnormity are detected; and the communication unit transmits the acquisition information of the data acquisition unit to the control unit and transmits the control instruction of the control unit to the background management platform. The utility model provides a transformer wisdom terminal can carry out the intelligent data acquisition of transformer, realizes switch temperature detection, remote intelligent control and communication function, and is convenient and reliable.

Description

Transformer intelligent terminal

Technical Field

The utility model relates to a transformer substation technical field especially relates to transformer wisdom terminal.

Background

The energy demand pressure is huge, the energy supply is more restricted, the energy production and consumption are seriously damaged to the ecological environment, and the energy technology level is generally lagged behind, so that the energy problem is urgently about the world and is also the energy problem faced by China at the present stage.

With the continuous promotion of electric power reform, the comprehensive automation system of the smart grid technology and the electric power system develops at a high speed. The ubiquitous power internet of things is built, so that a new path is opened up for safer operation of a power grid, more lean management, more accurate investment and better service. An intelligent distribution Transformer Terminal (TTU) is installed in an intelligent distribution station area, and secondary equipment integrating functions of power supply and utilization information acquisition, equipment running state monitoring, local intelligent control, communication and the like is produced.

The traditional terminal no longer meets the requirements, and the novel terminal needs to support an operating system and multi-thread task operation. The change has higher requirements on the capability of field operation and maintenance personnel; the field debugging environment is changeable, and the traditional mode connection is not portable enough.

SUMMERY OF THE UTILITY MODEL

Exist not enoughly to above-mentioned prior art, the utility model provides a transformer wisdom terminal.

The utility model adopts the technical proposal that:

transformer wisdom terminal includes:

the data acquisition unit is used for detecting and outputting phase current and phase voltage;

the control unit receives the acquired data information of the data acquisition unit and outputs a control instruction;

an action unit for executing the control instruction of the control unit;

the display unit is embedded at the display window and displays the detection and action states;

the self-checking protection unit is used for comparing the phase current/phase voltage with a preset threshold value to realize timing turn-off, zero sequence protection and overvoltage protection;

the alarm unit is used for alarming and outputting when a non-electric quantity signal and PT disconnection abnormity are detected;

the communication unit transmits the acquisition information of the data acquisition unit to the control unit and transmits a control instruction of the control unit to the background management platform;

the output ends of the data acquisition unit and the self-checking protection unit are connected with the control unit, the output end of the control unit is connected with the display unit, the action unit and the alarm unit, and the output end of the control unit is connected with the background management platform through the communication unit.

As a further technical solution of the utility model is: the self-checking protection unit comprises a phase current timing protection module, the phase current timing protection module comprises a timing time-limited quick-break protection, a timing time-limited overcurrent 1 section and a timing time-limited overcurrent II section, when the current is larger than a set value, a tripping command is output after a set time delay, and a tripping signal lamp is turned on when the equipment trips.

As a further technical solution of the utility model is: the self-test protection unit further comprises: and the phase current inverse time limit protection module is used for shortening the time of sending the action signal by the device along with the magnitude of the current when the current is larger than a set value. The user can reasonably select the inverse time limit multiple according to the actual situation, and further actively alarm and trip protection.

As a further technical solution of the utility model is: the self-test protection unit further comprises: and the overvoltage protection module and the device detect the Uab and the Ubc, and when one or more line voltages are larger than a voltage set value, a tripping command is output after a settable time delay, and equipment trips and simultaneously lights a tripping signal lamp.

As a further technical solution of the utility model is: the self-checking protection unit also comprises a zero sequence timing limit overcurrent protection module; and the detection of the grounding current is used for neutral point insulation or compensation.

As a further technical solution of the utility model is: the self-checking protection unit also comprises zero sequence voltage protection, detects whether the vector sum of the three-phase voltage is zero, and if the vector sum of the three-phase voltage is not zero, the single-phase earth fault is judged to occur, and then a protection action instruction is sent.

As a further technical solution of the utility model is: the non-electric quantity signal comprises a light gas signal of the body, a heavy gas signal of the body, an overtemperature signal and an overtemperature signal.

As a further technical solution of the utility model is: the PT disconnection warning specifically includes:

two sections of timing limit overcurrent protection action signals are set;

any phase current is greater than 0.3A, and the maximum value of any line voltage is less than 18V;

if both conditions are satisfied, the PT is judged to be broken.

As a further technical solution of the utility model is: the communication unit comprises a communication interface, a data output interface, a voltage signal input/output interface, a current signal input/output interface and a remote signaling interface; the communication interface comprises a USB interface, a network port, a 485 communication interface, a CAN bus interface and a 232 communication interface.

As a further technical solution of the utility model is: the control unit adopts an STM32F767IGT 632-bit ARM + DSPM7 dual-core high-speed controller.

The utility model has the advantages that:

the utility model provides a transformer wisdom terminal mainly is applicable to the 10kV transformer, can carry out the intelligent data acquisition of transformer, gathers electric current, voltage, zero sequence, on-off state, deciliter position, thermal diagnosis, environment, humiture etc. and switch temperature detects, remote intelligent control and communication function, convenient and reliable.

Drawings

Fig. 1 is a diagram of a transformer intelligent terminal structure provided by the present invention;

fig. 2 is a structural diagram of a self-checking protection unit in the intelligent terminal of the transformer;

fig. 3 is a logic diagram of a phase current timing protection module according to the present invention;

fig. 4a is a standard inverse time curve diagram of the phase current inverse time protection module according to the present invention;

fig. 4b is a very inverse time graph of the phase current inverse time protection module according to the present invention;

fig. 4c is an extreme inverse time curve of the phase current inverse time protection module according to the present invention;

fig. 4d is a short inverse time curve of the phase current inverse time protection module according to the present invention;

fig. 4e is a long inverse time curve of the phase current inverse time protection module according to the present invention;

FIG. 4f is a logic diagram of a phase current inverse time-lag protection module according to the present invention;

fig. 5 is a logic diagram of an overvoltage protection module according to the present invention;

fig. 6 is a logic diagram of a zero sequence timing margin overcurrent protection module provided by the present invention;

fig. 7 is a logic diagram of the zero sequence voltage protection module proposed by the present invention;

fig. 8 is a logic diagram of a non-power protection and alarm module according to the present invention;

fig. 9 is a logic diagram of the PT disconnection warning module according to the present invention.

Detailed Description

The present application will now be described in further detail with reference to the accompanying drawings. It should be understood that the specific features in the embodiments and examples of the present application are detailed description of the technical solutions of the present application, and are not limited to the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.

Referring to fig. 1 and fig. 2, wherein fig. 1 is a diagram of a transformer intelligent terminal structure according to the present invention; fig. 2 is a structural diagram of a self-checking protection unit in the intelligent terminal of the transformer;

as shown in fig. 1 and 2, the intelligent terminal for transformer includes:

the data acquisition unit 101 is used for detecting and outputting phase current and phase voltage;

the control unit 102 is used for receiving the acquired data information of the data acquisition unit and outputting a control instruction;

an action unit 103 for executing the control command of the control unit;

a display unit 104 embedded at the display window for displaying the detection and action states;

the self-checking protection unit 105 compares the phase current/phase voltage with a preset threshold value to realize timing turn-off, zero sequence protection and overvoltage protection;

the alarm unit 106 is used for alarming and outputting when a non-electric quantity signal and PT disconnection abnormity are detected;

the communication unit 107 is used for transmitting the acquisition information of the data acquisition unit to the control unit and transmitting the control instruction of the control unit to the background management platform;

The utility model provides a transformer intelligent terminal is arranged in a case, wherein, the front side of the case is provided with a panel, the panel is provided with a display unit, and the rear side of the case is provided with a terminal board; the terminal board is provided with a communication interface, a data output interface, a voltage signal input/output interface, a current signal input/output interface and a remote signaling interface; the communication interface comprises a USB interface, a network port, a 485 communication interface, a CAN bus interface and a 232 communication interface; the case is an aluminum alloy sealed case.

The embodiment of the utility model provides an in, the control unit adopts STM32F767IGT632 position ARM + DSP M7 dual-core high speed controller. The system is provided with the 32M SDRAM and the 32M FLASH, so that the operation is more stable and reliable, the AD7606 of ADI company is adopted for current, voltage and zero-sequence current collection, and the system has the functions of real-time monitoring of switching state, switching on and off position, thermal diagnosis, environment, temperature and humidity and the like, bus temperature detection, remote intelligent control and communication.

Referring to fig. 3, the self-checking protection unit comprises a phase current timing protection module, the phase current timing protection module comprises a timing time-limited quick-break protection, a timing time-limited overcurrent 1 section and a timing time-limited overcurrent II section, when the current is greater than a set value, a tripping command is output after a set time delay, and a tripping signal lamp is turned on when the equipment trips. The three-section protection can be respectively selected to be switched in/out, and the current and delay time parameter values can be reasonably set according to the actual requirements of users.

Referring to fig. 4 a-4 f, fig. 4a is a standard inverse time curve diagram of the phase current inverse time protection module according to the present invention; fig. 4b is a very inverse time graph of the phase current inverse time protection module according to the present invention; fig. 4c is an extreme inverse time curve of the phase current inverse time protection module according to the present invention; fig. 4d is a short inverse time curve of the phase current inverse time protection module according to the present invention; fig. 4e is a long inverse time curve of the phase current inverse time protection module according to the present invention; FIG. 4f is a logic diagram of a phase current inverse time-lag protection module according to the present invention;

the self-checking protection unit further comprises: and the phase current inverse time limit protection module is used for shortening the time of sending the action signal by the device along with the magnitude of the current when the current is larger than a set value. The user can reasonably select the inverse time limit multiple according to the actual situation, and further actively alarm and trip protection. Selecting an inverse time limit curve; there are "standard", "extraordinary", "extreme", "long inverse", "short inverse";

there are 5 inverse time-limited curves in total. Standard inverse time limit:

very inverse time-limited:

extreme inverse time limit:

short inverse time limit:

long inverse time limit:

referring to fig. 5, the self-test protection unit further includes: and the overvoltage protection module and the device detect the Uab and the Ubc, and when one or more line voltages are larger than a voltage set value, a tripping command is output after a settable time delay, and equipment trips and simultaneously lights a tripping signal lamp. The protection can be respectively selected to be switched on/off, and the voltage and the delay time parameter value can be reasonably set according to the actual requirement of a user.

Referring to fig. 6, the self-checking protection unit further includes a zero sequence timing limit overcurrent protection module; and the detection of the grounding current is used for neutral point insulation or compensation. Because the zero sequence current in the indirect grounding system is generally small, the precision of detecting the zero sequence current by the device is relatively high, and particularly the capacitance current in a long cable system is large, the balance comparison is needed, and the transformation ratio of the zero sequence current transformer is reasonably selected.

The zero sequence timing limit overcurrent protection can be selected to exit/alarm/trip. When the alarm is selected, the device detects that the zero sequence current of the line is larger than a set value and delays, and then the device lights an alarm signal lamp and records a corresponding event record; when the tripping is selected, the device detects that the zero sequence current of the line is larger than a set value, and after time delay, the device outputs a tripping command, lights a tripping signal lamp and records a corresponding event record.

Referring to fig. 7, the self-checking protection unit further includes zero-sequence voltage protection, and detects whether the vector sum of the three-phase voltages is zero, and if not, it determines that a single-phase ground fault occurs, and then sends a protection action command.

Referring to fig. 8, the non-electric quantity protection and alarm is implemented by setting a relay to collect various non-electric quantity signals of the transformer, such as light gas of the transformer body, heavy gas of the transformer body, oil temperature rise (over-temperature), over-high oil temperature (over-temperature) and the like. The user can carry out non-electric quantity alarm and trip action on and off.

Referring to fig. 9, the PT gives an alarm when the line is broken, and the voltage is applied to the line voltage, so as to automatically determine whether the voltage loop is broken. The criteria are as follows:

i. there are no two-stage timing limit overcurrent protection action signals;

any phase current is greater than 0.3A, and any line voltage maximum value is less than 18V;

if both conditions are satisfied, the PT is judged to be broken. And after monitoring that the PT is disconnected, the device automatically sends out an alarm signal.

The embodiment of the utility model provides an in, still set up reclosing lock, the reclosing lock condition is as follows:

the reclosing soft pressing plate (constant value) is switched in, the reclosing frequency is not 0, and the range is 0-10;

the switch receives the fault tripping signal and sends a tripping command;

the switch is in the off position.

And meeting the conditions, and actuating the reclosing after the delay time set by the reclosing. If any of the above conditions is not met, a fault is always present, or the device receives a remote command, reclosing will immediately stop.

And after the reclosing condition is met, starting the reclosing function once the device disappears at the switching-on position of the switch, and outputting a closing command by the device after time delay.

The utility model discloses a to the detection of temperature, can carry out the protection of high temperature overtemperature, gather the humiture of two door states and the cabinet body upper and lower two rooms and the management of microenvironment. When the temperature in the cabinet is too high, the air exhaust and heat dissipation can be realized.

In the embodiment of the present invention, 10 switching value input circuits are provided. The input loop is powered by an external power supply, the supply voltage being customizable by the user. Generally, the power supply voltage is the same as the power supply voltage of the device unless otherwise specified. The device takes full consideration of the jitter removal measure of switching value acquisition on hardware and software, and can distinguish the pulse width of 30ms without special requirements, and the distinguishing precision is 1 ms. Wherein the input amount 1 is defined as an operation local/remote signal, the input amount 2 is defined as a switch on/off signal, the input amount 3 is defined as a spring energy storage/non-energy storage signal, the input amount 4 is defined as an isolation/grounding switch on signal, the input amount 5 is a high temperature signal, the input amount 6 can be configured to be over-temperature, the input amount 7 is a smoke signal, the input amount 8 is a water level signal, the input amount 9 is a door magnetic signal, the input amount 10 is an SF6 air pressure low signal, the input amount can be set to be alternating current or direct current according to an external power supply, and the input amount is set in 'parameter > > remote control > > YX-AC-DC'.

The utility model discloses be furnished with a plurality of actions and throw and move back the function. Such as: the method comprises the following steps of quick-break tripping, overcurrent 1-section tripping, overcurrent 2-section tripping, overcurrent inverse time limit, zero-sequence tripping, zero-sequence inverse time limit, overload warning, overvoltage tripping, low-voltage tripping, zero-sequence voltage tripping, reclosing start, low-voltage warning, pt disconnection warning, control loop disconnection, non-electricity protection 1, non-electricity protection 2, non-electricity protection 3, non-electricity protection 4, non-electricity protection 5, low-cycle load shedding and the like. The user can select according to the actual situation.

The data acquisition unit can acquire and record records including protection action time, action current, switch on/off success, energy storage position, isolation position, high temperature, overtemperature, smoke, water level, door magnetism, SF6 air pressure low, switch on/off time operation time, bounce time, spring difference distance and the like.

The utility model discloses still set up the incident record, the incident record is saved according to the precedence of time of occurrence, and when the incident exceeded 60000, the device was automatic to cover oldest record with newest record in proper order. The content of each event record can be observed on the liquid crystal screen of the device, and the record can also be uploaded and recorded through RS232, RJ45 and RS485 communication buses.

The utility model provides a transformer wisdom terminal mainly is applicable to the 10kV transformer, can carry out the intelligent data acquisition of transformer, gathers electric current, voltage, zero sequence, on-off state, deciliter position, thermal diagnosis, environment, humiture etc. and switch temperature detects, remote intelligent control and communication function, has the function that convenient and reliable connection to other systems carry out the communication.

The intelligent terminal of the transformer meets the standards of power industry standards DL478-92 general technical conditions for static relay protection and safety automatic devices, GB/T721-2008 basic test methods for relay protection and safety automatic devices, GB/T5095 basic test rules and measurement methods for electromechanical elements for electronic equipment, and the like, and meets the quality requirements of product production. The device has compact structure, sealed case, maintenance-free design and good anti-interference performance, and can meet the severe requirements of operating in systems with severe environmental conditions, ring main units and the like.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a system for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction system which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and those skilled in the art can still modify or substitute the specific embodiments of the present invention with reference to the above embodiments, and any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are all within the scope of the claims of the present invention pending.

Claims

1. Transformer wisdom terminal, its characterized in that includes:

the data acquisition unit is used for detecting and outputting phase current, phase voltage, line current and line voltage;

an action unit for executing the control instruction of the control unit;

a display unit for displaying the detection and action state;

2. The intelligent terminal of the transformer according to claim 1, wherein the self-checking protection unit comprises a phase current timing protection module, the phase current timing protection module comprises a timing time-delay breaking protection module, a timing time-delay overcurrent 1 section and a timing time-delay overcurrent II section, when the current is greater than a set value, a tripping command is output after a set time delay, and equipment trips and a tripping signal lamp is on.

3. The intelligent transformer terminal according to claim 1, wherein the self-test protection unit further comprises: and the phase current inverse time limit protection module is used for shortening the time of sending the action signal by the device along with the magnitude of the current when the current is larger than a set value.

4. The intelligent transformer terminal according to claim 1, wherein the self-test protection unit further comprises: and the overvoltage protection module outputs a tripping command after a settable delay when one or more line voltages are larger than a voltage set value, and the equipment trips and simultaneously lights a tripping signal lamp.

5. The intelligent terminal of claim 1, wherein the self-test protection unit further comprises a zero sequence timing time-limited over-current protection module; and the detection of the grounding current is used for neutral point insulation or compensation.

6. The intelligent terminal of claim 1, wherein the self-checking protection unit further comprises zero sequence voltage protection, and detects whether the vector sum of the three-phase voltages is zero, if not, it determines that a single-phase ground fault occurs, and then sends out a protection action command.

7. The intelligent terminal of claim 1, wherein the non-power signal comprises a light gas signal, a heavy gas signal, an over-temperature signal, and an over-temperature signal.

8. The intelligent terminal of claim 1, wherein the PT disconnection alarm specifically comprises:

two sections of timing limit overcurrent protection action signals are set;

if both conditions are satisfied, the PT is judged to be broken.

9. The transformer intelligent terminal as claimed in claim 1, wherein the communication unit comprises a communication interface, a data output interface, a voltage signal input/output interface, a current signal input/output interface and a remote signaling interface, and the communication interface comprises a USB interface, a network port, a 485 communication interface, a CAN bus interface and a 232 communication interface.

10. The intelligent terminal of claim 1, wherein the control unit employs an STM32F767IGT 632-bit ARM + DSPM7 dual-core high-speed controller.