CN201868952U - Embedded processor technology-based fault isolation controller - Google Patents

Abstract

The utility model discloses an embedded processor technology-based fault isolation controller. The controller comprises a current transformer/potential transformer (CT/PT) module, a switching value isolation module, a processor module, a general packet radio service (GPRS) communication module and a power module, wherein the CT/PT module, the switching value isolation module and the GPRS communication module are simultaneously in bidirectional connection with the processor module; and the processor module is connected with the power module. Through the embedded processor technology-based fault isolation controller, characteristic quantity in a fault can be detected, a fault point is cut off and isolated from a power grid by controlling a matched switchgear when grounding and a shorted fault occur, and corresponding action information and alarm information are remotely transmitted in a wireless mode.

Description

Fault Isolation controller based on the flush bonding processor technology

Technical field

The utility model relates to the ground connection and the short trouble isolation technology of distribution network, and particularly a kind of device of the Fault Isolation controller based on the flush bonding processor technology constitutes and implementation method.

Background technology

China 10kV power distribution network number is huge, has a very wide distribution, and apparatus insulated level is low, and the influence that is subject to electrical network internal overvoltage and extraneous natural environment causes insulation fault, and power supply reliability is in urgent need to be improved.Exist the problem of the following aspects more outstanding at present:

(1) power distribution network backbone improvement back branch line failure rate significantly rises, and according to the statistics of related data, the fault in the power distribution network more than 80% occurs in the branch line user side, and the probability that breaks down on the transmission line backbone is less;

(2) because of the fault of sole user on the branch line, its protection mismate and involve that the whole piece feeder line has a power failure and the responsibility dispute that causes increases year by year.Owing to the accident of user's electric equipment feeds through to distribution line, cause when the road has a power failure completely, use other users of same circuit also to have to have a power failure, thereby greatly reduce the power supply reliability of distribution;

(3) more existing fault isolation arrangements though can meet the demands substantially, lack enough action sensitivities to single phase ground fault when phase fault, be difficult to satisfy application requirements.

Characteristics at the problems referred to above, if can in power distribution network, isolate the user's branch line that breaks down accurately, not only can make a certain user's fault can not cause the power failure of basic routing line and neighboring user, reduce the responsibility dispute, accident responsibility out-of-bounds is well defined, and fault location point fast, avoid the whole piece circuit is patrolled, the coverage of line failure and the extent of injury are reduced to minimum, improve reliability, fail safe and the economy of power distribution network power supply greatly.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of building method, device of Fault Isolation controller of flush bonding processor technology, utilize the characteristic component when single-phase earthing and phase fault take place, control the Fault Isolation that supporting switchgear is realized distribution system.

For achieving the above object, a kind of Fault Isolation controller that the utility model provides based on the flush bonding processor technology, be used to comprise the distribution network system of many outlets and a bus, when single-phase earthing and phase fault take place, to carry out Fault Isolation, it is characterized in that described controller comprises:

The CT/PT module is gathered the voltage and current of PT of electric power system and CT correspondence, exports to processor module for analog-to-digital conversion.

The switching value isolation module: input adopts the photoelectricity isolation to carry out electric signal isolation to 8 way switch amounts, through impedance matching circuit signal is nursed one's health then, carries out sampling processing for CPU.The CPU control signal is amplified after isolating through photoelectricity, and to drive relay line bag, relay is output as 4 the tunnel, all the other 12 road optocouplers outputs.

Processor module: be the control centre of collection all in the system, analysis and judgement, communication function, and certain computing capability can be provided.

GPRS communication module: be responsible for serial communication, transmit wirelessly with processor module.

Power module: for other modules provide DC power supply, possess the AC power input protection, possess EMI and suppress ability.

Above-mentioned controller system is characterized in that, the signal input form of described line-selected earthing device comprises three road voltage input signals: input three-phase phase voltage signal; Or the voltage signal of any two-phase phase voltage and residual voltage combination, or the voltage signal of arbitrary line voltage and residual voltage combination.

Compared with prior art, the scheme that adopts the utility model to provide, detection sensitivity to earth fault greatly improves, communication modes is flexible, be used in GPRS (General Packet Radio Service, GPRS) network communications technology solves parameters remote and measures and transmission problem; Antijamming capability is strong, can extensively be suitable for the power distribution network complex electromagnetic environments, can realize timely warning, real-time data acquisition and the function of control in real time, for 10kV distribution overvoltage suppresses and the fault location isolation technology provides controlling platform.

The utility model proposes the Fault Isolation controller of flush bonding processor technology, characteristic quantity in the time of can detection failure, the switchgear that matches by control when ground connection and short trouble take place excises the fault point, isolates from electrical network, and by wireless mode, with corresponding action information, warning message teletransmission.

Description of drawings

Fig. 1 is the structure chart of the utility model based on the Fault Isolation controller of flush bonding processor technology;

Fig. 2 analogue filter circuit structural representation;

Fig. 3 AD driving circuit structure schematic diagram;

The main peripheral circuit structural representation of Fig. 4 DSP;

Fig. 5 power unit structural representation.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in detail, with purpose, scheme and the effect of further understanding the utility model, but appended graphic and embodiment explanation is not to be used to limit protection range of the present utility model.

With reference to figure 1, the utility model proposes a kind of Fault Isolation controller based on the flush bonding processor technology, be used to comprise the distribution network system of many outlets and a bus, to isolate when single-phase earthing and phase-to phase fault take place, controller of the present utility model comprises with lower module:

(1) CT/PT module

The CT/PT module is gathered the voltage and current of one time 4 road PT of electric power system and 4 road CT correspondences, exports to processor module for analog-to-digital conversion after secondary PT/CT conversion.The input of instrument voltage transformer is accepted the voltage signal of a PT of electric power system, and is converted into the voltage signal that DSP can gather, and offers DSP and calculates current voltage measuring value; The input of instrument current transformer is accepted the current signal of a CT of electric power system, and is converted into the voltage signal that DSP can gather, the collection of voltage and current each 4 the tunnel.

PT selects instrument voltage transformer DSH-TV120/3.53 for use, and CT selects instrument current transformer DSH-TA6/3.53 for use.

Performance index

The PT technical indicator:

Output frequency: 50Hz

Input voltage: 100V

Output voltage:＜3V

Frequency stability:＜± 5%

The output waveform distortion factor:＜5%

Working temperature :-40 ℃～+ 60 ℃

The CT technical indicator:

Output frequency: 50Hz

Input current: 5A

Output voltage:＜3V

Frequency stability:＜± 5%

The output waveform distortion factor:＜5%

Working temperature :-40 ℃～+ 60 ℃

(2) switching value isolation module

The switching value isolation module is coupled into horizontal electrical signal to 8 way switch amounts input employing photoelectricity isolates, and through impedance matching circuit signal is nursed one's health then, carries out sampling processing for CPU.The CPU control signal is amplified after isolating through photoelectricity, and to drive relay line bag, relay is output as 4 the tunnel, all the other 12 road optocouplers outputs.This module mainly is made up of optocoupler and relay and their peripheral circuit.What optocoupler was selected for use is the TLP127 type of TOSHIBA.The model that relay is selected for use is the ST2-L2-DC24V of Panasonic.For guaranteeing that processor can in time respond 8 tunnel inputs, the switching value input has increased NAND gate 74LS30, and the variation of switching value is inserted processor as one tunnel interrupt request singal.

The switching value isolation module provides one road 24V power supply to the outside simultaneously, uses for the optocoupler input and output, provides 40mA electric current to the importation, provides 120mA electric current to output,

Performance index

Switching value input acquisition index: signal level 24V;

Relay output-index: withstand voltage 250V, load current 5A (maximum);

The optocoupler output-index: withstand voltage＞30V, load current 120mA (maximum);

With the processor module interface: the 5VTTL level.

(3) processor module

Processor module is finished the analog acquisition function: will be carried out filtering, sampling and analog-to-digital conversion and be calculated the corresponding digital quantity that gets with its effective value through FFT by 8 road ac voltage signals of PT/CT module output; Switching value input acquisition function: will gather by 8 way switch input variables of switching value isolation module output; Switching value output function: can control 16 way switch amounts according to instruction or preset program; Real-time clock function: the real-time clock data can be provided; The serial communication function: the USB (universal serial bus) of two-way RS232 level standard, the one tunnel as with the communication of GPRS module, the one tunnel as the parameter setting; The setting of parameter and preservation: can receive, change and preserve from the parameter that the serial ports transmission is set; Self-checking function: when powering on or receive instruction, carry out system and get self check, and report to host computer by GPRS and serial ports;

It is the TMS320F2812 of Ti company that the type selecting of processor is specifically selected model for use.

Totally 8 groups in analog acquisition passage, each passage has identical structure, accept the effective voltage range of signal to be-5V～+ 5V (can adjust) according to real work voltage.Forward path adopts operational amplifier A D8674 to constitute gain and adjusts and filter circuit, is the range requirement of satisfying AD through filtered signal, carries out the biasing of voltage, and the follower that is made of high speed amplifier AD8040 promotes again.Analog-to-digital conversion partly adopts the built-in A/D convertor circuit of DSP (12bit), has adopted eight passages of ADINA0/ADINA1/ADINA2/ADINA3/ADINB0/ADINB1/ADINB2/ADINB3.Whole analog acquisition has partly adopted unified reference source 3.0V, is realized by AD780

Other peripheral circuits of DSP comprise:

Reset circuit: MAX708 and peripheral circuit are used for being implemented in the reset operation under system's power or power-down situation;

Real time clock circuit: DS3234 and peripheral circuit (reserve battery CR2016) are for system provides real-time clock;

Expansion SRAM:CY7C1041V33, memory capacity 256k*16bit;

IO drives: sn74ls16245, the digital input and output that are used for DSP and exterior I O circuit board drive.

Two-way serial ports level shifting circuit: MAX3232 and peripheral circuit, one is used for system debug, and one is used for the GPRS module controls.

The input of 8 road IO is detected by the GPIOB7.0 of DSP, and the control of No. 4 relays and the output of 12 road optocouplers are by the GPIOA15.0 control of DSP.Main peripheral circuit principle such as Fig. 4.

Performance index

Collection of simulant signal index: ac voltage signal 3VRMS (maximum), 50Hz; 12 of Measurement Resolution.

Switching value input and output index: the Transistor-Transistor Logic level of compatible 5V;

Serial ports: RS232 level standard, baud rate＞9600bps;

Processor ability index: 32 integer type processors, more than the 100MIPS;

Power consumption＜5W (mean value).

ONCHIP program storage: 128K*16

ONCHIP program storage: 14K*16

12 AD of 16 passages

The programmable external reference stand-by period

Two serial ports independently

A plurality of programmable I/O

Working temperature :-40～85

(4) GPRS communication module

The GPRS communication module is set up the radio communication chain circuit based on gprs service between host computer and data terminal.

The communication mode of whole monitoring system is a point-to-multipoint, and wherein a host computer is as main website, and other data terminals are as slave station.

Response mode is adopted in communication between the principal and subordinate, inquires about each slave station by the main website timesharing, and slave station sends data to main website after receiving the inquiry frame.

What the GPRS module was selected for use is the G200 type of Beijing prompt wheat communication apparatus Co., Ltd.What adopt is active work mode, promptly just data is delivered to serial ports at once after the G200 module is received data.Serial data adopts the form transmission.

(5) power module

Power module provides DC control supply for other parts of system; Possesses the AC power input protection; Possess EMI and suppress ability.The AC-DC power module SMA15-220T512 of power supply will be converted to through the 100V AC power of Filtering Processing the needed 5V of processor module and ± the 12V DC power supply, be mainly used in the embedded TT﹠C system of DSP, an other power module SMA15-220D524 will be converted to the 24V DC power supply that relay needs through the 100V AC power of Filtering Processing.

Performance index

5V output: output current 2A, ripple＜100Mv (Vp-p);

12V output: output current 1.5A, ripple＜100Mv (Vp-p);

± 12V output: output current 0.2A, ripple＜100mV (Vp-p);

24V output: output current 0.6A, ripple＜200mV (Vp-p);

Fuse index: 5A;

Filter index: electric current 2A.

Composition frame chart such as Fig. 5.

(6) controller architecture

Controller architecture holds the circuit of whole system; Dustproof, waterproofing protection is provided; Cabinet adopts the cast aluminium Seal Design, circuit board, and layering is loaded in the cabinet, and lead-out wire adds the watertight terminal.Processor module in the system and the design of switching value isolation module are on a circuit board; PT/CT module and power supply design are on a circuit board; GPRS and power supply thereof are a circuit board, totally 3 circuit boards.

Performance index

Degree of protection: the regulation that under the situation that does not have the GPRS antenna, meets EN60529/IEC529 (IP65).

Electromagnetic compatibility: 4 grades (IEC225/IEC60065).

Volume: 250*250*200mm (the wide * height of long *)

Above content is to further describing that the utility model is done in conjunction with concrete preferred implementation; can not assert that embodiment of the present utility model only limits to this; for the utility model person of an ordinary skill in the technical field; under the prerequisite that does not break away from the utility model design; can also make some simple deduction or replace, all should be considered as belonging to the utility model and determine the utility model protection scope by claims of being submitted to.

Claims (6)

1. the Fault Isolation controller based on the flush bonding processor technology is characterized in that described controller comprises: CT/PT module, switching value isolation module, processor module, GPRS communication module and power module; Wherein, CT/PT module, switching value isolation module and GPRS communication module are connected with processor module is two-way simultaneously; Be connected with power module on the processor module.

2. the Fault Isolation controller based on the flush bonding processor technology according to claim 1, it is characterized in that: described CT/PT module comprises PT and CT, wherein PT is instrument voltage transformer DSH-TV120/3.53, and CT is instrument current transformer DSH-TA6/3.53.

3. the Fault Isolation controller based on the flush bonding processor technology according to claim 1 is characterized in that, also comprises:

One processor module is finished 8 road ac analog acquisition functions: will be gathered by 8 way switch input variables of switching value isolation module output; The USB (universal serial bus) of two-way RS232 level standard, the one tunnel as with the communication of GPRS module, the one tunnel as the parameter setting; The setting of parameter and preservation: can receive, change and preserve from the parameter that the serial ports transmission is set; It is the TMS320F2812 of Ti company that the type selecting of processor is specifically selected model for use;

Totally 8 groups in analog acquisition passage, accept the effective voltage range of signal for-5V～+ 5V.Forward path adopts operational amplifier A D8674 to constitute gain and adjusts and filter circuit, is promoted by the follower that high speed amplifier AD8040 constitutes through filtered signal again;

Analog-to-digital conversion partly adopts the built-in A/D convertor circuit of DSP, has adopted eight passages of ADINA0/ADINA1/ADINA2/ADINA3/ADINB0/ADINB1/ADINB2/ADINB3; Whole analog acquisition has partly adopted unified reference source 3.0V, is realized by AD780;

Other peripheral circuits of DSP comprise:

Reset circuit: MAX708 and peripheral circuit;

Real time clock circuit: DS3234 and peripheral circuit;

Expansion SRAM:CY7C1041V33, memory capacity 256k*16bit;

IO drives: sn74ls16245;

Two-way serial ports level shifting circuit: MAX3232 and peripheral circuit;

The input of 8 road IO is detected by the GPIOB7.0 of DSP, and the control of No. 4 relays and the output of 12 road optocouplers are by the GPIOA15.0 control of DSP.

4. the Fault Isolation controller based on the flush bonding processor technology according to claim 1 is characterized in that, also comprises:

The GPRS communication module is set up the radio communication chain circuit based on gprs service between host computer and data terminal.The communication mode of whole monitoring system is a point-to-multipoint, and wherein a host computer is as main website, and other data terminals are as slave station;

What the GPRS module was selected for use is the G200 type of Beijing prompt wheat communication apparatus Co., Ltd.

5. the Fault Isolation controller based on the flush bonding processor technology according to claim 1 is characterized in that, also comprises:

Power module provides DC control supply for other parts of system; Possesses the AC power input protection; Possess certain EMI and suppress ability.The AC-DC power module SMA15-220T512 of power supply will be converted to through the 100V AC power of Filtering Processing the needed 5V of processor module and ± the 12V DC power supply, be mainly used in the embedded TT﹠C system of DSP, an other power module SMA15-220D524 will be converted to the 24V DC power supply that relay needs through the 100V AC power of Filtering Processing.

6. use aforesaid right requirement 2,3,4 or 5 described Fault Isolation controllers for one kind, it is characterized in that described electrical network distant place measurement and control unit comprises based on the flush bonding processor technology:

One CT/PT module PT selects instrument voltage transformer DSH-TV120/3.53 for use, and CT selects instrument current transformer DSH-TA6/3.53 for use;

One processor module is finished 8 road ac analog acquisition functions: it is the TMS320F2812 of Ti company that the type selecting of processor is specifically selected model for use; Other peripheral circuits of DSP comprise: reset circuit: MAX708 and peripheral circuit; Real time clock circuit: DS3234 and peripheral circuit; Expansion SRAM:CY7C1041V33, memory capacity 256k*16bit; IO drives: sn74ls16245; Two-way serial ports level shifting circuit: MAX3232 and peripheral circuit; The input of 8 road IO is detected by the GPIOB7.0 of DSP, and the control of No. 4 relays and the output of 12 road optocouplers are by the GPIOA15.0 control of DSP;

One GPRS communication module is set up the radio communication chain circuit based on gprs service between host computer and data terminal; The communication mode of whole monitoring system is a point-to-multipoint, and wherein a host computer is as main website, and other data terminals are as slave station; What the GPRS module was selected for use is the G200 type of Beijing prompt wheat communication apparatus Co., Ltd.

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