CN205791496U - A kind of fast short-circuit protective controls platform - Google Patents
A kind of fast short-circuit protective controls platform Download PDFInfo
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- CN205791496U CN205791496U CN201620527243.5U CN201620527243U CN205791496U CN 205791496 U CN205791496 U CN 205791496U CN 201620527243 U CN201620527243 U CN 201620527243U CN 205791496 U CN205791496 U CN 205791496U
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- 230000001681 protective effect Effects 0.000 title claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 23
- 230000003993 interaction Effects 0.000 claims abstract description 15
- 238000002955 isolation Methods 0.000 claims description 24
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- 238000010168 coupling process Methods 0.000 claims description 23
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- 230000003287 optical effect Effects 0.000 claims description 23
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Abstract
This utility model relates to a kind of fast short-circuit protective and controls platform; including main control module, current/voltage acquisition module, serial communication modular, open and output module, pulse output module and LCD human-computer interaction module into module, relay; described serial communication modular and LCD human-computer interaction module are connected alternately with main control module respectively; described current/voltage acquisition module is connected with the input of main control module into the outfan of module with opening, and the outfan of described main control module is outputed the input of module and pulse output module respectively and is connected with relay.This utility model is used for detection and the protection of short circuit malfunction, can either control on the spot, it is also possible to remotely operated by serial ports.Monitor current and voltage signals and the status signal of fast chopper of electrical network in real time, send breaker open operation signal according to the current zero-crossing point time, can quickly detect short trouble, it was predicted that current zero-crossing point, improve circuit breaker short circuit electric current breaking capacity, it is achieved the quick excision of trouble point.
Description
Technical field
This utility model belongs to electric power short-circuit protection field, is specifically related to a kind of fast short-circuit protective and controls platform.
Background technology
Short trouble is one of fault most common in power system, that harm is the most serious.The main cause causing short trouble has the insulation damages of electrical equipment and current－carrying conductor, and electrical equipment is due to the equipment deficiency installed, imperfect maintenance causes, and operations staff violates safe operation rules and maloperation etc..Short trouble not only results in circuit component damage, affects the operation of power equipment, the safe operation of serious meeting harm electrical network, causes systemic breakdown.
For this present situation, domestic and international commonly used microprocessor-based protection measure and control device judges the generation of short trouble, by circuit breaker trip trouble point short circuit branch.Current microprocessor-based protection measure and control device judges that the short circuit current time is longer; generally more than 20ms; and cannot the Accurate Prediction short circuit current zero crossing time; at short circuit current compared with in big or that inductive load is more occasion; it is easy to occur that chopper cannot the situation of blow-out; being easily caused serious electric power short circuit accident to occur, the safe operation of electrical network and power equipment is caused major hidden danger by this.
Utility model content
The purpose of this utility model is to provide a kind of fast short-circuit protective to control platform, can quickly detect short trouble, it was predicted that current zero-crossing point, improve circuit breaker short circuit electric current breaking capacity, it is achieved the quick excision of trouble point.
For achieving the above object, this utility model have employed techniques below scheme:
A kind of fast short-circuit protective controls platform; including main control module, current/voltage acquisition module, serial communication modular, open and output module, pulse output module and LCD human-computer interaction module into module, relay; described serial communication modular and LCD human-computer interaction module are connected alternately with main control module respectively; described current/voltage acquisition module is connected with the input of main control module into the outfan of module with opening, and the outfan of described main control module is outputed the input of module and pulse output module respectively and is connected with relay.
Described current/voltage acquisition module includes current transformer, voltage transformer, the 3rd signal amplification circuit, filter circuit and A/D change-over circuit, described current transformer is connected with the input of filter circuit through the 3rd signal amplification circuit with the outfan of voltage transformer, the outfan of filter circuit is connected with the input of A/D change-over circuit, and the outfan of A/D change-over circuit is connected with the input of main control module.
Described opening includes the first optical coupling isolation circuit, the first signal amplification circuit and signal conditioning circuit into module, the outfan of described first optical coupling isolation circuit is connected with the input of signal conditioning circuit through the first signal amplification circuit, and the outfan of signal conditioning circuit is connected with the input of main control module.
Described relay is outputed module and is included the second optical coupling isolation circuit, secondary signal amplifying circuit and solid-state relay, the input of described second optical coupling isolation circuit is connected with main control module, and the outfan of the second optical coupling isolation circuit is connected with the input of solid-state relay through secondary signal amplifying circuit.
Described pulse output module includes that the 3rd optical coupling isolation circuit and voltage follower, the input of described 3rd optical coupling isolation circuit are connected with main control module, and its outfan is connected with the input point of voltage follower.
Described LCD human-computer interaction module includes serial communication interface, LED LCDs and key-press module.
Described serial communication modular includes toggle switch selection circuit, RS232 communication interface and 485 communication interfaces.
Described main control module includes that FPGA and DSP, described DSP include outside FLASH and SRAM memory.
As shown from the above technical solution, this utility model has the advantage that
1. this utility model is that a kind of fast short-circuit protective controls platform, for detection and the protection of short circuit malfunction, can either control on the spot, it is also possible to remotely operated by serial ports.Monitor current and voltage signals and the status signal of fast chopper of electrical network in real time, after short-circuit signal being detected, send breaker open operation signal according to the current zero-crossing point time.This control platform achieves the half-wave zero passage excision of short circuit current, plays an important role the service life of the safe operation and chopper that improve electrical network.
2. this utility model have employed the combo architectures of FPGA+DSP, controls current-voltage sampling module by FPGA and gathers current and voltage signals, and the parallel filtering realizing multichannel current and voltage signals in FPGA processes, and drastically increases the processing speed of filtering algorithm.Use floating type DSP to carry out short circuit computing, make computational accuracy have large increase.
3. this utility model has LCD human-computer interaction interface, in real time display power network current information of voltage and the duty of fast chopper.According to the power system mode of connection and the size of short circuit current, can be by LCD interface configurations short-circuit parameter and control platform courses pattern.
4. this utility model uses 15V DC pulse to control the action of fast chopper, compared with solid-state relay control chopper, has faster speed of action and less action error.
The most of the present utility model opening outputs module into module, relay and pulse output module all have employed light-coupled isolation, anti-stop signal wrong or open the control platform caused into signal overvoltage and damage, and improves the reliability of system.
Accompanying drawing explanation
Fig. 1 is circuit block diagram of the present utility model；
Fig. 2 is the circuit block diagram of this utility model current/voltage acquisition module；
Fig. 3 is that this utility model opens the circuit block diagram into module；
Fig. 4 is the circuit block diagram that module outputed by this utility model relay；
Fig. 5 is the circuit block diagram of this utility model pulse output module.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described further:
As shown in Figure 1; the fast short-circuit protective of the present embodiment controls platform; including main control module 1, current/voltage acquisition module 2, serial communication modular 3, open and output module 5, pulse output module 6 and LCD human-computer interaction module 7 into module 4, relay; serial communication modular 3 and LCD human-computer interaction module 7 is connected alternately with main control module 1 respectively; current/voltage acquisition module 2 is connected with the input of main control module 1 into the outfan of module 4 with opening, and the outfan of main control module 1 is outputed the input of module 5 and pulse output module 6 respectively and is connected with relay.
As shown in Figure 2, current/voltage acquisition module 2 includes current transformer 21, voltage transformer the 22, the 3rd signal amplification circuit 23, filter circuit 24 and A/D change-over circuit 25, current transformer 21 is connected with the input of filter circuit 24 through the 3rd signal amplification circuit 23 with the outfan of voltage transformer 22, the outfan of filter circuit 24 is connected with the input of A/D change-over circuit 25, and the outfan of A/D change-over circuit 25 is connected with the input of main control module 1.Electrical network primary current voltage signal is converted to secondary current voltage signal through current/voltage sensor 21,22 by this current/voltage acquisition module 2, and by the 3rd signal amplification circuit 23 and filter circuit 24, signal is processed, the signal after process is converted to the recognizable digital signal of CPU by A/D convertor circuit 25.This filter circuit 24 effectively filters out the harmonic wave in current/voltage and singular point, improves the precision of algorithm further.
As shown in Figure 3, open and include the first optical coupling isolation circuit the 41, first signal amplification circuit 42 and signal conditioning circuit 43 into module 4, the outfan of the first optical coupling isolation circuit 41 is connected with the input of signal conditioning circuit 43 through the first signal amplification circuit 42, and the outfan of signal conditioning circuit 43 is connected with the input of main control module 1.This is opened into module 4 for receiving external status signals, throws bounce number etc. including electrical network fast chopper divide-shut brake position signalling, capacitance voltage signal, handcart mode bit signal and unit protection.This is opened and can effectively prevent the external signal overvoltage damage to CPU module into module 4, decreases the CPU erroneous judgement that external signal interference causes simultaneously.This is opened the signal conditioning circuit 43 in module 4 and can effectively prevent owing to external signal disturbs the signal error that causes, and the CPU that the first optical coupling isolation circuit 41 is prevented from outside overvoltage or misconnection causes damages.
As shown in Figure 4, relay is outputed module 5 and is included the second optical coupling isolation circuit 51, secondary signal amplifying circuit 52 and solid-state relay 53, the input of the second optical coupling isolation circuit 51 is connected with main control module 1, and the outfan of the second optical coupling isolation circuit 51 is connected through the input of secondary signal amplifying circuit 52 with solid-state relay 53.This relay is outputed module 5 and is connected external relay control circuit, it is achieved the transmission of circuit-breaker switching on-off status signal, actuating signal and device alarm signal etc., can realize outputing of actuating signal and alarm signal in 3ms.
As it is shown in figure 5, pulse output module 6 includes that the 3rd optical coupling isolation circuit 61 and voltage follower 62, the input of the 3rd optical coupling isolation circuit 61 are connected with main control module 1, its outfan is connected with the input point of voltage follower 62.The low voltage pulse signal that main control module 1 is sent by this pulse output module 6 exports 15V d. c. voltage signal through the 3rd optical coupling isolation circuit 61 and voltage follower 62, is connected with the IGBT control circuit of outside fast chopper, controls the divide-shut brake action of fast chopper.
The LCD human-computer interaction module 7 of the present embodiment includes serial communication interface, LED LCDs and key-press module.This LCD human-computer interaction module 7 is communicated with main control module 1 by serial ports, show current-voltage information, circuit breaker position status information and outside intake information in real time, having short-circuit parameter to arrange, system wiring mode selects and the function such as controller mode of operation selection simultaneously.
Serial communication modular 3 includes toggle switch selection circuit, RS232 communication interface and 485 communication interfaces.This serial communication modular 3 selects RS232 interface and 485 interfaces by toggle switch circuit, and serial port baud rate has Auto-matching function.Serial communication modular 3 supports Modbus rtu protocol, IEC60870-5-103 agreement and IEC60870-5-104 agreement, is connected, with outside DCS system, the information realizing controlling platform mutual, has remote signalling, telemetry and telecommand function.This main control module 1 includes that FPGA and DSP, DSP include outside FLASH and SRAM memory.
Operation principle: after system is opened, start initialize and hardware check, when system is all normally complete after, main control module 1 receives the A/D sampled digital signal of current-voltage sampling module, all information are transferred to LCD human-computer interaction module 7 after completing by the outside intake signal of detection simultaneously.If abnormal conditions there is, LCD
The corresponding alarm signal of interface display, and control corresponding solid-state relay output alarm signal.Simultaneity factor receives remote control, remote signalling and the telemetry command of outside by serial communication modular 3, and corresponding information is sent to external reception system.
When electrical network is short-circuited, main control module 1 detects short circuit generation, call rapid cut-off algorithm, sampling 2ms short circuit current voltage signal, main control module completes filtering and the calculating of signal in 0.2ms, if the current amplitude calculated is more than the action threshold value set in LCD, then continue to calculate the short circuit zero crossing time.According to short circuit zero crossing time and fast chopper intrinsic movement time, main control module 1 sends the separating brake pulse IGBT control circuit to fast chopper, it is achieved the separating brake of chopper.CPU completes short circuit current waveform and the Waveform storage of circuit-breaker status signal simultaneously, and LCD human-computer interaction interface 7 shows short-circuit alarming and action message.
Embodiment described above is only to be described preferred implementation of the present utility model; not scope of the present utility model is defined; on the premise of without departing from this utility model design spirit; various deformation that the technical solution of the utility model is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that this utility model claims determine.
Claims (8)
1. a fast short-circuit protective controls platform, it is characterized in that: include main control module (1), current/voltage acquisition module (2), serial communication modular (3), open into module (4), module (5) outputed by relay, pulse output module (6) and LCD human-computer interaction module (7), described serial communication modular (3) and LCD human-computer interaction module (7) are connected alternately with main control module (1) respectively, described current/voltage acquisition module (2) is connected with the input of main control module (1) into the outfan of module (4) with opening, the outfan of described main control module (1) is outputed the input of module (5) and pulse output module (6) respectively and is connected with relay.
Fast short-circuit protective the most according to claim 1 controls platform, it is characterized in that: described current/voltage acquisition module (2) includes current transformer (21), voltage transformer (22), 3rd signal amplification circuit (23), filter circuit (24) and A/D change-over circuit (25), described current transformer (21) is connected with the input of filter circuit (24) through the 3rd signal amplification circuit (23) with the outfan of voltage transformer (22), the outfan of filter circuit (24) is connected with the input of A/D change-over circuit (25), the outfan of A/D change-over circuit (25) is connected with the input of main control module (1).
Fast short-circuit protective the most according to claim 1 controls platform; it is characterized in that: described in open and include the first optical coupling isolation circuit (41), the first signal amplification circuit (42) and signal conditioning circuit (43) into module (4); the outfan of described first optical coupling isolation circuit (41) is connected through the input of the first signal amplification circuit (42) with signal conditioning circuit (43), and the outfan of signal conditioning circuit (43) is connected with the input of main control module (1).
Fast short-circuit protective the most according to claim 1 controls platform; it is characterized in that: described relay is outputed module (5) and included the second optical coupling isolation circuit (51), secondary signal amplifying circuit (52) and solid-state relay (53); the input of described second optical coupling isolation circuit (51) is connected with main control module (1), and the outfan of the second optical coupling isolation circuit (51) is connected through the input of secondary signal amplifying circuit (52) with solid-state relay (53).
Fast short-circuit protective the most according to claim 1 controls platform; it is characterized in that: described pulse output module (6) includes the 3rd optical coupling isolation circuit (61) and voltage follower (62); the input of described 3rd optical coupling isolation circuit (61) is connected with main control module (1), and its outfan is connected with the input point of voltage follower (62).
Fast short-circuit protective the most according to claim 1 controls platform, it is characterised in that: described LCD human-computer interaction module (7) includes serial communication interface, LED LCDs and key-press module.
Fast short-circuit protective the most according to claim 1 controls platform, it is characterised in that: described serial communication modular (3) includes toggle switch selection circuit, RS232 communication interface and 485 communication interfaces.
Fast short-circuit protective the most according to claim 1 controls platform, it is characterised in that: described main control module (1) includes that FPGA and DSP, described DSP include outside FLASH and SRAM memory.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620527243.5U CN205791496U (en) | 2016-05-28 | 2016-05-28 | A kind of fast short-circuit protective controls platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620527243.5U CN205791496U (en) | 2016-05-28 | 2016-05-28 | A kind of fast short-circuit protective controls platform |
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| CN205791496U true CN205791496U (en) | 2016-12-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108322031A (en) * | 2018-02-02 | 2018-07-24 | 杭州佳和电气股份有限公司 | A kind of system and method in three-phase alternating current adjustable signal source |
| CN112748361A (en) * | 2020-04-28 | 2021-05-04 | 天津市中力神盾电子科技有限公司 | Distribution line short-circuit current detection method and device |
| CN113109671A (en) * | 2021-04-30 | 2021-07-13 | 武汉大学 | Method for accelerating detection of small half-wave stage of fault current |
-
2016
- 2016-05-28 CN CN201620527243.5U patent/CN205791496U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108322031A (en) * | 2018-02-02 | 2018-07-24 | 杭州佳和电气股份有限公司 | A kind of system and method in three-phase alternating current adjustable signal source |
| CN112748361A (en) * | 2020-04-28 | 2021-05-04 | 天津市中力神盾电子科技有限公司 | Distribution line short-circuit current detection method and device |
| CN113109671A (en) * | 2021-04-30 | 2021-07-13 | 武汉大学 | Method for accelerating detection of small half-wave stage of fault current |
| CN113109671B (en) * | 2021-04-30 | 2022-07-19 | 武汉大学 | Method for accelerating detection of small half-wave stage of fault current |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Quick short -circuit protection control platform Effective date of registration: 20171011 Granted publication date: 20161207 Pledgee: Hefei high tech Company limited by guarantee Pledgor: ANHUI SHANGTU ELECTRIC POWER PROTECTIVE APPARATUS Co.,Ltd. Registration number: 2017340000271 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20181010 Granted publication date: 20161207 Pledgee: Hefei high tech Company limited by guarantee Pledgor: ANHUI SHANGTU ELECTRIC POWER PROTECTIVE APPARATUS Co.,Ltd. Registration number: 2017340000271 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Quick short -circuit protection control platform Effective date of registration: 20181029 Granted publication date: 20161207 Pledgee: Hefei high tech Company limited by guarantee Pledgor: ANHUI SHANGTU ELECTRIC POWER PROTECTIVE APPARATUS Co.,Ltd. Registration number: 2018340000592 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20200421 Granted publication date: 20161207 Pledgee: Hefei high tech Company limited by guarantee Pledgor: ANHUI SHANGTU ELECTRIC POWER PROTECTIVE APPARATUS Co.,Ltd. Registration number: 2018340000592 |
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Effective date of registration: 20211013 Address after: 230088 No. 26 Acacia Road, hi tech Zone, Anhui, Hefei Patentee after: ANHUI HUIDIAN TECHNOLOGY Co.,Ltd. Address before: 230088 No. 26 Acacia Road, hi tech Zone, Anhui, Hefei Patentee before: ANHUI SHANGTU ELECTRIC POWER PROTECTIVE APPARATUS Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20161207 |