CN203456864U - Adaptive three-section protection device - Google Patents
Adaptive three-section protection device Download PDFInfo
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- CN203456864U CN203456864U CN201320480006.4U CN201320480006U CN203456864U CN 203456864 U CN203456864 U CN 203456864U CN 201320480006 U CN201320480006 U CN 201320480006U CN 203456864 U CN203456864 U CN 203456864U
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Abstract
The utility model relates to an adaptive three-section protection device. The adaptive three-section protection device is in communication connection with a SCADA system, and comprises a voltage current calculating module, an adaptive protection module, a communication module and a display and input module. The voltage current calculating module, the communication module and the display and input module are in communication connection with the adaptive protection module separately, and the communication module is in communication connection with the SCADA system. The beneficial effects of the utility model are that: the protection device provided by the utility model is in modular design, the voltage current calculating module is designed in order to guarantee the precision and reliability of the adaptive protection calculation, and the precision and speed of the voltage current amplitude calculation in a protection system are improved.
Description
Technical field
The utility model relates to relaying protection field, relates in particular to a kind of setting device of self adaptation three section protection.
Background technology
Relaying protection is important technical measures and the means of safe operation of power system.Traditional relay protection setting value obtains by calculated off-line according to electric power system maximum operational mode mostly; and by the sensitivity of its protection of electric power system minimum operational mode verification, can not revise in real time setting value along with the variation of operational mode, topological structure, fault type, system intrinsic parameter and load.This setting mode has following shortcoming: setting device is generally determined setting value by the most serious service conditions, although can guarantee under various operational modes, protection can correct operation, but cannot realize best protection effect for the fault occurring under non-maximum running status; Once setting device determines that setting value can not change in a short time; cannot adapt to the variation of device parameter, operational mode and load in electric power system topological structure, fault type, system, when system changes, the selectivity of protection; sensitivity meeting seriously reduces, and even loses protection range.Along with the expansion of electric power system scale, distribution line network configuration and power supply form are also increasingly sophisticated, and traditional distribution line protection device more and more can not meet the requirement of electric power system.
Summary of the invention
The utility model object is to overcome the deficiency of above prior art, and a kind of setting device of self adaptation three section protection is provided, and specifically has following technical scheme to realize:
Described self adaptation three section protection device; be connected with SCADA system communication; comprise that electric current and voltage calculates module, adaptive guard module, communication module and demonstration and input module; described electric current and voltage calculates module, communication module and demonstration and is connected with adaptive guard module communication respectively with input module, and described communication module is connected with SCADA system communication.
The further design of described self adaptation three section protection device is, described electric current and voltage calculates module and comprises analogue signal acquisition circuit, level shifting circuit, AD converter and dsp processor, described analog signal input circuit, level shifting circuit, AD converter is connected successively with dsp processor, described analog quantity acquisition circuit comprises bipolarity operational amplifier integrated circuit (IC) chip and current transformer, described bipolarity operational amplifier integrated circuit (IC) chip is connected with current transformer, described level shifting circuit is composed in series by two bipolarity operational amplifier integrated circuit (IC) chip.
The further design of described self adaptation three section protection device is; described demonstration and input module comprise single-chip microcomputer, liquid crystal display screen display circuit, keyboard interface circuit and LED lamp display circuit, and described liquid crystal display screen display circuit, keyboard interface circuit and LED lamp display circuit are connected with described single chip communication respectively.
The further design of described self adaptation three section protection device is; also comprise switching value input circuit; described switching value input circuit is connected with the external apparatus interface of this device; comprise optocoupler, current-limiting resistance, filter unit and voltage-stabiliser tube; described voltage-stabiliser tube, current-limiting resistance and filter unit are connected to light-emitting diode one end of optocoupler successively, and described filter unit is connected to form by electric capacity and resistance.
Advantage of the present utility model is as follows:
The apparatus moduleization design that the utility model provides, for precision and the reliability that guarantees that adaptive guard calculates, has designed electric current and voltage and has calculated module, has improved precision and speed that in protection system, electric current and voltage amplitude is calculated.
Accompanying drawing explanation
Fig. 1 is the module diagram of the setting device of described self adaptation three section protection.
Fig. 2 is the circuit diagram of described analog quantity acquisition circuit.
Fig. 3 is the circuit diagram of described level shifting circuit.
Fig. 4 is keyboard interface circuit figure.
Fig. 5 is the circuit diagram of liquid crystal display screen display circuit.
Fig. 6 is the circuit diagram of single-chip microcomputer.
Fig. 7 is LED display circuit figure.
Fig. 8 is switching value input circuit figure.
Embodiment
Below in conjunction with accompanying drawing, the utility model scheme is elaborated.
As Fig. 1, according to self adaptation three section protection method, provide a kind of self adaptation three section protection device, comprise
Electric current and voltage calculates module: according to the electric current and voltage data that gather current acquisition and collect, obtain amplitude and the phase angle of electric current and voltage;
SCADA system: be responsible for the collection of signal and the arrangement of system information;
Adaptive guard module: by the setting method of three sections of current protections of self adaptation, the operation information of the distribution line that SCADA system is sent and being processed by the real-time amplitude data that electric current and voltage calculates the electric current and voltage that module sends, calculates the real-time setting value of three section protection;
Communication module: make each module and SCADA System Computer carry out communication, thereby realize distant place transmission and the exchange of information;
Show and input module: can show primary system figure, measurement data, protection information, fault waveform; and electric current and voltage calculates module, communication module and demonstration and be connected with adaptive guard module communication respectively with input module, communication module is connected with SCADA system communication.
As calculating module, Fig. 2-3 electric current and voltage comprises analogue signal acquisition circuit, level shifting circuit, AD converter and dsp processor.Analog signal input circuit, level shifting circuit, AD converter are connected successively with dsp processor.Wherein AD converter adopts binary channels ,Si road, analog differential input, the 16bit synchronized sampling serial A/D converter ADS8362 that TI company produces.Analog quantity acquisition circuit comprises bipolarity operational amplifier integrated circuit (IC) chip and current transformer, and bipolarity operational amplifier integrated circuit (IC) chip is connected with Current Transmit A1.Level shifting circuit is composed in series by two bipolarity operational amplifier integrated circuit (IC) chip.In the present embodiment, bipolarity operational amplifier integrated circuit (IC) chip all adopts OP07 chip, and current transformer adopts ZMCT113C, 0.5 grade of the accurate grade of ZMCT113C, the range of linearity 0 ~ 100A, specified input current 5A, the rated current that can tolerate 20 times meets requirement of system design.Voltage signal after instrument transformer transforms is that small-signal need pass to ADS8362 after amplifying circuit amplifies.
As Fig. 4-7, show with input module and comprise single-chip microcomputer, liquid crystal display screen display circuit, keyboard interface circuit and LED lamp display circuit.Liquid crystal display screen display circuit, keyboard interface circuit and LED lamp display circuit are connected with single chip communication respectively.The advantages such as the liquid crystal using in the present embodiment, for Organic Light Emitting Diode is OLED, has excellent shock resistance, flexible, and low-temperature characteristics is good, and manufacturing process is simple, and cost is lower.Liquid crystal display screen adopts full-localized demonstration, can show primary system figure, measurement data, protection information, fault waveform.Under liquid crystal display screen default situations, adopt low power operation pattern, extended the physical life of liquid crystal.Panel button is connected with keyboard interface circuit, designs short and sweet convenient operation, has corresponding LED display lamp on panel, and the various states of device are shown, makes user very clear to the ruuning situation of Apparatus and system.
As Fig. 8, the self adaptation three section protection device that the present embodiment provides also comprises switching value input circuit.The general-purpose relay module integration of this switching value input circuit and protective device has reduced volume and the cost of device on a circuit board.Switching value input circuit is connected with the external apparatus interface of this device, comprises optocoupler, current-limiting resistance, filter unit and voltage-stabiliser tube.Voltage-stabiliser tube, current-limiting resistance and filter unit are connected to light-emitting diode one end of optocoupler successively, and filter unit is connected to form by electric capacity and resistance.
In communication module, integrated 485 communication modules and GPRS communication, can realize remote control, remote measurement, remote regulating, remote signaling function easily, meets flexibly the needs of feed line automatization system communication.
Claims (3)
1. a self adaptation three section protection device, be connected with SCADA system communication, it is characterized in that comprising that electric current and voltage calculates module, adaptive guard module, communication module and demonstration and input module, described electric current and voltage calculates module, communication module and demonstration are connected with adaptive guard module communication respectively with input module, described communication module is connected with SCADA system communication, described electric current and voltage calculates module and comprises analogue signal acquisition circuit, level shifting circuit, AD converter and dsp processor, described analog signal input circuit, level shifting circuit, AD converter is connected successively with dsp processor, described analog quantity acquisition circuit comprises bipolarity operational amplifier integrated circuit (IC) chip and current transformer, described bipolarity operational amplifier integrated circuit (IC) chip is connected with current transformer, described level shifting circuit is composed in series by two bipolarity operational amplifier integrated circuit (IC) chip.
2. self adaptation three section protection device according to claim 1; it is characterized in that described demonstration and input module comprise single-chip microcomputer, liquid crystal display screen display circuit, keyboard interface circuit and LED lamp display circuit, described liquid crystal display screen display circuit, keyboard interface circuit and LED lamp display circuit are connected with described single chip communication respectively.
3. self adaptation three section protection device according to claim 1; characterized by further comprising switching value input circuit; described switching value input circuit is connected with the external apparatus interface of this device; comprise optocoupler, current-limiting resistance, filter unit and voltage-stabiliser tube; described voltage-stabiliser tube, current-limiting resistance and filter unit are connected to light-emitting diode one end of optocoupler successively, and described filter unit is connected to form by electric capacity and resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320480006.4U CN203456864U (en) | 2013-08-07 | 2013-08-07 | Adaptive three-section protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320480006.4U CN203456864U (en) | 2013-08-07 | 2013-08-07 | Adaptive three-section protection device |
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| Publication Number | Publication Date |
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| CN203456864U true CN203456864U (en) | 2014-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320480006.4U Expired - Fee Related CN203456864U (en) | 2013-08-07 | 2013-08-07 | Adaptive three-section protection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474949A (en) * | 2013-08-07 | 2013-12-25 | 南京因泰莱配电自动化设备有限公司 | Self-adaptive three-sectional protection setting method and device |
-
2013
- 2013-08-07 CN CN201320480006.4U patent/CN203456864U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474949A (en) * | 2013-08-07 | 2013-12-25 | 南京因泰莱配电自动化设备有限公司 | Self-adaptive three-sectional protection setting method and device |
| CN103474949B (en) * | 2013-08-07 | 2016-12-28 | 南京因泰莱配电自动化设备有限公司 | The setting method of a kind of self adaptation three section protection and device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 Termination date: 20160807 |
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| CF01 | Termination of patent right due to non-payment of annual fee |