CN2729981Y - Digital comprehensive protector - Google Patents
Digital comprehensive protector Download PDFInfo
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- CN2729981Y CN2729981Y CN 200420082070 CN200420082070U CN2729981Y CN 2729981 Y CN2729981 Y CN 2729981Y CN 200420082070 CN200420082070 CN 200420082070 CN 200420082070 U CN200420082070 U CN 200420082070U CN 2729981 Y CN2729981 Y CN 2729981Y
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Abstract
The utility model provides a digital comprehensive protector, comprising a calculating and comparison circuit, a signal sampling and alignment circuit, and an on-off input / output circuit. The calculating and comparison circuit comprises a SCM and a memorizer which are connected by the circuit. The SCM is connected with the signal sampling and alignment circuit through the circuit. The on one end of the SCM is connected with the on-off input circuit through the circuit. The other end of the SCM is connected with the on-off output circuit through the circuit. The digital comprehensive protector also comprises a network communication module which is connected with the SCM through the circuit. The communication with the upper machine on the networking state can be accomplished. The utility model is suitable to the microcomputer production of a distributing network and a substation whose voltage is below 110KV, and a neutral point is earth-free or earths with the ground through an arc-suppression coil or a small resistance. Through the three programmable modes, the utility model can be directly used for the primary devices of a transmission line, a transformer, a capacitor, an electric motor, etc. to realize the functions of protection, control, measuring and monitoring.
Description
Technical field
The utility model relates to a kind of digital comprehensive protector, particularly a kind of digital comprehensive protector with three grades of programmable patterns that contains the protection component storehouse.
Background technology
Tenth Five-Year Plan Period, the automation in two net transformations, electric railway and urban track traffic transportation automation, power scheduling and distribution is implemented in the main growth point that the relaying protection industry market is new.The user is to the technical merit of microcomputer protecting device product requirement, particularly to the product manufacture level, security reliability, all had higher requirement in the aspects such as adaptability of electrical network feature.
Present general microcomputer protecting device is to dispose different protected locations at the difference of main equipment; the hardware platform of each protected location and software platform design respectively and safeguard; after the part throttle characteristics that just might occur high-pressure section at the scene changes, original Pei Zhi the protected location situation that can not meet the demands.
Domestic relevant product generally adopts 80C196 series or 296 Series chip; adopt immobilized single protection at main equipment, the reticular density of LCD is 128 * 64 or 240 * 64, does not have waveform to show; there is not harmonic wave to show there is not the failure wave-recording function yet.
Summary of the invention
The purpose of this utility model is to provide a kind of digital comprehensive protector.Its with DSP (single-chip microcomputer) technology and integrated circuit technique in conjunction with after be applied to power system automatic field; can directly be applied to protection, control, measurement and the function for monitoring of main equipments such as transmission line and transformer, capacitor, motor by three grades of programmable patterns, have the versatility and the selectivity of Main Equipment Protection.
For achieving the above object, the utility model provides a kind of digital comprehensive protector, and it comprises one and calculates and comparison circuit one signal sampling and adjustment circuit and switching value input/output circuitry; Described calculating comprises single-chip microcomputer, first memory and the second memory that is connected by circuit with comparison circuit; Described single-chip microcomputer is connected by circuit with the adjustment circuit with signal sampling, and described single-chip microcomputer one terminal circuit connects the switching value input circuit, and other end circuit connects the switching value output circuit.
In described calculating and the comparison circuit, this single-chip microcomputer is a microprocessor, is used for deal with data and makes judgement; Operating process data of the temporary transient stored program of this first memory and intermediate data, second memory are used to store user protection definite value of setting and the working condition of monitoring single-chip microcomputer.
Single-chip microcomputer comes gating sampling channel or first memory as primary processor spare by control data space selection wire, program space selection wire, address wire; Serial Peripheral Interface (SPI) module by single-chip microcomputer is controlled second memory; Utilize data/address bus to carry out data passes between each device.
Described signal sampling comprises mutual inductance converter and the sample circuit that circuit is connected with the adjustment circuit, the interchange analog signal conversion that this mutual inductance converter will come from external system is the signal that the order of magnitude is suitable for, signal after this process conversion is sampled by sample circuit, carry out the A/D conversion by single-chip microcomputer again, and digital signal is handled by single-chip microcomputer.
Behind the digital input/output module mouth of described switching value input circuit with switching value status signal input single-chip microcomputer after isolating of outside through photoelectricity, handle by single-chip microcomputer, and export control commands corresponding to the switching value output circuit according to result.
A kind of digital comprehensive protector that the utility model provides also comprises a network communication module, and it is connected by circuit with single-chip microcomputer, realizes the communication with host computer under the networking state.
A kind of digital comprehensive protector that the utility model provides; extract electric current and voltage from signal input; by sampling after the conversion; be sent to A/D again; the digital quantity that obtains and switch state signal are delivered to single-chip microcomputer to be calculated, judge, handles; send display with the result then, and the output control command.When fault takes place, output alarm or tripping operation, though record trouble information simultaneously is power down drop-out not; Under networking situation, host computer can also carry out order control to device according to certain communication protocol, and when fault took place, device was uploaded host computer with the fault message of record, when host computer was called desired data, the device that preestablishes station number was just made accordingly and being replied.
A kind of digital comprehensive protector that the utility model provides has increased " element-engineering-user " three grades of programmable patterns of being with the protection component storehouse.This pattern is quoted the Object oriented programming theory, Principles of Relay Protection has been carried out the division of " object " and " process ", the object of protecting has been divided into the object that protective current, zero-sequence current, low-pressure side electric current, negative-sequence current, differential current, maximum voltage, minimum voltage etc. can expand to 32 kinds; The process of protection is divided into the band time limit can expands to 8 process less than, IEC inverse time lag 1, IEC inverse time lag 2, IEC inverse time lag 3, ratio braking etc. greater than, band time limit.After " object " and " process " being divided other combination, finished the protection component storehouse that has 32 * 8 kinds of heap(ed) capacities.
A kind of digital comprehensive protector that the utility model provides, it has following advantage:
1, distinctive " element-engineering-user " three grades of programming modes, field-programmable technology (ISP) can provide nearly 32 * 8 kinds protection component, and the component type scene can be set, and component parameters can on-the-spotly be set, but also a distant place is set.
2, professional online programming mode can be the customized specific function requirement of user's network system under extreme case.
3, at a high speed, the high-precision AC signal measurement, sample frequency reaches 1600Hz.The FFT (Fourier transformation) that finishes a plurality of AC signal in the microsecond level calculates, and can show the first-harmonic and 2～13 subharmonic of this signal.
4, powerful vector quantization computational methods, the external analog amount passage based on 12 tunnel; Can obtain multiple derivation AC signal feature, comprise positive and negative, zero sequence, phase-line conversion, angle, impedance, difference stream, power etc.
Electric current and voltage waveform when 5, the failure wave-recording of ripple 32 dot densities is used for record trouble weekly, starting component, the passage of failure wave-recording are optional.Dominant record size reaches 200 cycles * three-phase.
6, real-time waveform shows, is 320 * 240 graphic lcds by resolution, can show the 2-3 cycle waveform of any two AC signal simultaneously.Adjustable binary channels waveform is shown as field monitor powerful support is provided.
7, adopt big screen LCD (resolution is 320 * 240), icon display and Chinese character explanation, all displaying contents are drawn in " pel " mode, can increase and modification according to customer requirements.Operate easily and adjust, the set-up function with two-stage cryptoguard is that field management facilitates.
8, the multiple communication interface that comprises RS485/CAN, the communication protocol of enhancing except that the transmission normal data, also can be transmitted real-time waveform, physical data block etc.
Description of drawings
The circuit block diagram of the digital comprehensive protector that Fig. 1 provides for the utility model.
Embodiment
Following according to Fig. 1, a kind of preferred forms of the present utility model is described.
As shown in Figure 1, the circuit block diagram of the digital comprehensive protector that provides for the utility model; It comprises one and calculates and comparison circuit 101, one signal samplings and adjustment circuit 102 and switching value input/output circuitry; Described calculating comprises single-chip microcomputer 1011 and 2 memories (not illustrating in the drawings) that are connected by circuit with comparison circuit 101; Described single-chip microcomputer 1011 and signal sampling with adjust circuit 102 and be connected by circuit, described single-chip microcomputer 1,011 one terminal circuits connect switching value input circuit 1031, other end circuit connection switching value output circuit 1032.
In described calculating and the comparison circuit 101, this single-chip microcomputer 1011 (the chip model is TMS320LF2407A) is that TI company uses a fixed-point processor chip of developing at electric power system and electric machine speed regulation specially, it is microprocessor of the present utility model, be used for deal with data and make judgement, this dsp chip has following characteristics:
(1) disposal ability is strong.Instruction cycle is the shortest to be 25ns, and operational capability reaches 40MIPS;
(2) has bigger flash memory in the sheet.The FLASH memory that has the 32K word in the TMS320LF2407A sheet, up to the data/program RAM of 1.5K word, the single port RAM of 544 word dual port RAMs and 2K word.
(3) low in energy consumption.TMS320C2XX series DSP chip each MIPS when 5V works consumes 1.9mA, and each MIPS consumes 1.1mA when 3.3V works.Use the battery saving mode of DSP nuclear can further reduce power consumption.
Temporary transient operating process data of stored program of this first memory (the chip model is CY7C1021) and intermediate data, second memory (the chip model is X5043) are used to store user protection definite value of setting and the working condition of monitoring single-chip microcomputer 1011.
Single-chip microcomputer 1011 comes gating sampling channel or first memory as primary processor spare by control data space selection wire, program space selection wire, address wire; Serial Peripheral Interface (SPI) module by single-chip microcomputer 1011 is controlled second memory; Utilize data/address bus to carry out data passes between each device.
Described signal sampling comprises mutual inductance converter 1021 and the sample circuit 1022 that circuit is connected with adjustment circuit 102, it is to come from the AC signal of external system, be generally the analog signals of 0～5A electric current, 0～100V voltage, 0～100A electric current, 0～1A electric current, be converted to milliampere current signal of level by mutual inductance converter 1021, sample by sample circuit 1022 again, and carry out A/D conversion by A/D (analog/digital) modular converter (not illustrating in the drawings), analog quantity is converted to transfers to single-chip microcomputer 1011 behind the digital quantity and handle.
Behind the digital input/output module mouth of described switching value input circuit 1031 with switching value status signal input single-chip microcomputer 1011 after isolating of outside through photoelectricity, and, export control commands corresponding to switching value output circuit 1032 according to result then by its processing.
A kind of digital comprehensive protector that the utility model provides also comprises a network communication module 104, and it is connected with single-chip microcomputer 1011 circuit, realizes the communication with host computer under the networking state.
The digital comprehensive protector that the utility model provides; extract electric current and voltage from signal input 106; signal is sampled after changing; carry out the A/D conversion by single-chip microcomputer 1011 again; and digital quantity and the switch state signal that obtains calculated, judge, handled by single-chip microcomputer 1011; then the result is sent display 105, and the output control command.When fault takes place, switching value output circuit 1032 output alarms or tripping operation, though record trouble information simultaneously is power down drop-out not; Under networking situation, communication module 104 can also carry out order control to device according to certain communication protocol, and when fault took place, device was uploaded to host computer with the fault message of record, when host computer was called desired data, the device that preestablishes station number was just made accordingly and being replied.
A kind of digital comprehensive protector that the utility model provides, single-chip microcomputer have also increased " element-engineering-user " three grades of programmable modules in band protection component storehouse.This module is quoted the Object oriented programming theory, Principles of Relay Protection has been carried out the division of " object " and " process ", the object of protecting has been divided into the object that protective current, zero-sequence current, low-pressure side electric current, negative-sequence current, differential current, maximum voltage, minimum voltage etc. can expand to 32 kinds; The process of protection is divided into the band time limit can expands to 8 process less than, IEC inverse time lag 1, IEC inverse time lag 2, IEC inverse time lag 3, ratio braking etc. greater than, band time limit.After " object " and " process " being divided other combination, finished the protection component storehouse that has 32 * 8 kinds of heap(ed) capacities.
A kind of digital comprehensive protector that the utility model provides, it has following advantage:
1, distinctive " element-engineering-user " three grades of programming modes, field-programmable technology (ISP) can provide nearly 32 * 8 kinds protection component, and the component type scene can be set, and component parameters can on-the-spotly be set, but also a distant place is set.
2, professional online programming mode can be the customized specific function requirement of user's network system under extreme case.
3, at a high speed, the high-precision AC signal measurement, sample frequency reaches 1600Hz.The FFT (Fourier transformation) that finishes a plurality of AC signal in the microsecond level calculates, and can show the first-harmonic and 2～13 subharmonic of this signal.
4, powerful vector quantization computational methods, the external analog amount passage based on 12 tunnel; Can obtain multiple derivation AC signal feature, comprise positive and negative, zero sequence, phase-line conversion, angle, impedance, difference stream, power etc.
Electric current and voltage waveform when 5, the failure wave-recording of ripple 32 dot densities is used for record trouble weekly, starting component, the passage of failure wave-recording are optional.Dominant record size reaches 200 cycles * three-phase.
6, real-time waveform shows, is 320 * 240 graphic lcds by resolution, can show the 2-3 cycle waveform of any two AC signal simultaneously.Adjustable binary channels waveform is shown as field monitor powerful support is provided.
7, adopt big screen LCD (resolution is 320 * 240), icon display and Chinese character explanation, all displaying contents are drawn in " pel " mode, can increase and modification according to customer requirements.Operate easily and adjust, the set-up function with two-stage cryptoguard is that field management facilitates.
8, the multiple communication interface that comprises RS485/CAN, the communication protocol of enhancing except that the transmission normal data, also can be transmitted real-time waveform, physical data block etc.
A kind of digital comprehensive protector that the utility model provides; its with singlechip technology and integrated circuit technique in conjunction with after be applied to power system automatic field, be applicable to the following electric pressure isolated neutral of 110KV, through grounding through arc or through the microcomputer type product of low resistance grounding distribution network, transformer station.Can directly be applied to protection, control, measurement and the function for monitoring of main equipments such as transmission line and transformer, capacitor, motor by three grades of programmable patterns, have the versatility and the selectivity of Main Equipment Protection.
Claims (7)
1. digital comprehensive protector, it comprises one and calculates and comparison circuit, a signal sampling and adjust circuit and switching value input/output circuitry; Be characterised in that,
Described calculating comprises single-chip microcomputer, first memory and the second memory that is connected by circuit with comparison circuit;
Described single-chip microcomputer is connected by circuit with the adjustment circuit with signal sampling;
Described single-chip microcomputer one terminal circuit connects the switching value input circuit, and other end circuit connects the switching value output circuit.
2. digital comprehensive protector as claimed in claim 1 is characterized in that, described single-chip microcomputer is a deal with data and the microprocessor of making judgement; Operating process data of the temporary transient stored program of described first memory and intermediate data; Described second memory is used to store user protection definite value of setting and the working condition of monitoring single-chip microcomputer.
3. digital comprehensive protector as claimed in claim 1 is characterized in that, described signal sampling comprises mutual inductance converter and the sample circuit that circuit is connected with the adjustment circuit.
4. digital comprehensive protector as claimed in claim 3 is characterized in that, the interchange analog signal conversion that described mutual inductance converter will come from external system is the signal that the order of magnitude is suitable for; Described sample circuit is sampled to signal; And carry out analog/digital conversion by single-chip microcomputer, be analog signal conversion digital signal.
5. digital comprehensive protector as claimed in claim 1 is characterized in that, described switching value input circuit is with the switching value status signal input single-chip microcomputer of outside; Described switching value output circuit output control command.
6. digital comprehensive protector as claimed in claim 1 is characterized in that, also comprises a network communication module, and it is connected by circuit with single-chip microcomputer, realizes the communication with host computer under the networking state.
7. digital comprehensive protector as claimed in claim 1, it is characterized in that, single-chip microcomputer also comprises the three grades of programmable functions modules in protection component storehouse " element-engineering-user ", and these three grades of programmable functions modules have been carried out the division of " object " and " process " to Principles of Relay Protection; Described object comprises 32 kinds; Described process comprises 8; Form 32 * 8 kinds of protection component storehouses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420082070 CN2729981Y (en) | 2004-08-20 | 2004-08-20 | Digital comprehensive protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420082070 CN2729981Y (en) | 2004-08-20 | 2004-08-20 | Digital comprehensive protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2729981Y true CN2729981Y (en) | 2005-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420082070 Expired - Fee Related CN2729981Y (en) | 2004-08-20 | 2004-08-20 | Digital comprehensive protector |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453118B (en) * | 2007-11-29 | 2011-06-29 | 上海蓝瑞软件技术有限公司 | Distributed one control multiple automatic arc-suppression coil control apparatus |
| CN102590649A (en) * | 2011-09-28 | 2012-07-18 | 上海久创电气自动化设备有限公司 | Low-voltage detection system and method |
| CN103207586A (en) * | 2013-04-16 | 2013-07-17 | 柳州铁道职业技术学院 | Intelligent load controller for power distribution branches and control method for controller |
| CN103235215A (en) * | 2013-04-08 | 2013-08-07 | 上海久创电气自动化设备有限公司 | Multi-functional instrument |
| CN104184120A (en) * | 2014-09-11 | 2014-12-03 | 南自晋能自动化有限公司 | High-performance transformer protection device |
| CN104659760A (en) * | 2014-06-19 | 2015-05-27 | 吴春刚 | Method for realizing automatic comprehensive protection of transformer substation |
| CN104104077B (en) * | 2014-08-04 | 2017-03-08 | 南京工程学院 | 20kV neutral grounding in distribution power network method for handover control and device |
| CN108011354A (en) * | 2017-12-14 | 2018-05-08 | 中国恩菲工程技术有限公司 | Intelligent motor protection device |
-
2004
- 2004-08-20 CN CN 200420082070 patent/CN2729981Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453118B (en) * | 2007-11-29 | 2011-06-29 | 上海蓝瑞软件技术有限公司 | Distributed one control multiple automatic arc-suppression coil control apparatus |
| CN102590649A (en) * | 2011-09-28 | 2012-07-18 | 上海久创电气自动化设备有限公司 | Low-voltage detection system and method |
| CN103235215A (en) * | 2013-04-08 | 2013-08-07 | 上海久创电气自动化设备有限公司 | Multi-functional instrument |
| CN103207586A (en) * | 2013-04-16 | 2013-07-17 | 柳州铁道职业技术学院 | Intelligent load controller for power distribution branches and control method for controller |
| CN103207586B (en) * | 2013-04-16 | 2015-07-01 | 柳州铁道职业技术学院 | Control method for intelligent load controller for power distribution branches |
| CN104659760A (en) * | 2014-06-19 | 2015-05-27 | 吴春刚 | Method for realizing automatic comprehensive protection of transformer substation |
| CN104104077B (en) * | 2014-08-04 | 2017-03-08 | 南京工程学院 | 20kV neutral grounding in distribution power network method for handover control and device |
| CN104184120A (en) * | 2014-09-11 | 2014-12-03 | 南自晋能自动化有限公司 | High-performance transformer protection device |
| CN108011354A (en) * | 2017-12-14 | 2018-05-08 | 中国恩菲工程技术有限公司 | Intelligent motor protection device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |