CN2904431Y - Relay protection controller of fast Fourier algorithm and DSP Tech. combination - Google Patents
Relay protection controller of fast Fourier algorithm and DSP Tech. combination Download PDFInfo
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- CN2904431Y CN2904431Y CNU2005201239232U CN200520123923U CN2904431Y CN 2904431 Y CN2904431 Y CN 2904431Y CN U2005201239232 U CNU2005201239232 U CN U2005201239232U CN 200520123923 U CN200520123923 U CN 200520123923U CN 2904431 Y CN2904431 Y CN 2904431Y
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Abstract
A relay protection and control device combining fast Fourier algorithm with DSP technology is characterized in that this device comprises six parts: a processor model, an analog quantity data collection model, an opening-inserting and departing interface model, a communication model, a power model and a keyboard display model. The utility model has the advantages and technical effects that the reliability and rapidity of the relay protection action are improved by using the high-speed data calculation ability of the high performance digital signal processing chip DSP and the high accuracy data processing ability to make a double-signal control to action execution device of the relay protection; the whole device is provided with a good regulating performance which improves the stability of the electrical network and reduces the accident rate, such as off production, etc. caused by false operation and refusing operation of the relay protection action; the calculation of harmonic analysis is simplified by applying the fast Fourier algorithm improved; the hardware circuit is simple and the real-time control precision is high, all which have sound applicable prospects.
Description
(1) technical field:
The utility model belongs to relay protection of power system control technology field, the relaying protection control device that particularly a kind of fast Fourier algorithm combines with the DSP technology.
(2) background technology: the main task of relay protection of power system is exactly when electric power system is broken down, and excises faulty line selectively with the short as far as possible time.General protective relaying device is by measuring comparing element, logic determines element and carrying out output element three parts and form.At present; in order to adapt to fast-developing electric utility; make electrical network can be continuous, safe and reliable the digital protective relay control technology more and more is applied in the practical operation for the user provides high-quality electric energy, thereby improved the various aspects of performance of protective relaying device.These control technologys are mostly based on the fourier algorithm of classics, realize by programmable digital circuit engineering and real time digital signal treatment technology (as the singlechip chip technology etc.).But there are shortcomings such as hardware circuit complexity, debug difficulties, poor anti jamming capability and bad adaptability mostly in this type of control technology.Fast development along with power industry; the capacity and the scale of distribution system increase day by day; requirement to the relaying protection control device also improves constantly; it requires the control device of protective relaying device to make reasonable parameter according to the difference of fault type, the difference of system running state and difference of harmonic effects or the like to adjust, to adapt to fast-developing electric utility.Therefore, traditional relaying protection control device has been difficult to satisfy the performance requirement of modern industry, thereby is necessary to invent a kind of novel control device, especially a kind of adaptable relaying protection control device.
(3) summary of the invention
The purpose of this utility model is to invent the relaying protection control device that a kind of fast Fourier algorithm combines with the DSP technology; it is in conjunction with DSP signal processor with high performance; can overcome the shortcoming of above-mentioned traditional control device preferably, be a kind of fast speed, high accuracy, control device that the harmonic wave adaptive capacity is strong.
Detailed technology scheme of the present utility model: the relaying protection control device that a kind of fast Fourier algorithm combines with the DSP technology, it is characterized in that it by processor module, Analog Data Acquistion Module, open into leaving interface module, communication module, power module and keyboard display module six parts and form; The input of said Analog Data Acquistion Module connects external voltage instrument transformer summation current transformer, and its output connects the input of central data treatment circuit; Saidly leave interface module is connected to DSP after photoelectric coupler isolation universaling I/O port, switching value is drawn through photoelectrical coupler by universaling I/O port, exit and electrical equipment; Said power module outlet connects the central data processor module, is the dsp chip power supply; The output of central processing module connects the input of communication module and keyboard display module respectively.
Above-mentioned said Analog Data Acquistion Module is made up of voltage, electric current AC sampling front-end circuit and filtering, amplifying circuit; The AC sampling front-end circuit is with voltage, the current signal gathered, through being transformed to the small voltage amount behind the secondary voltage current transformer, the small voltage amount is through filter circuit, behind the voltage amplifier circuit, conversion A/D converter acceptable voltage range, voltage become centrifugal pump and deposit among the RAM of control device after over-sampling, A/D conversion; Filter circuit adopts step low-pass active filter.
Above-mentioned said voltage, electric current AC sampling front-end circuit constitute the input saturation protection with D11, D12, D21, D22, constitute instrument transformer phase shift compensation and rc filter circuit with R24, R25, R26, R34, R35, R36, C11, C12, C16, C17; Said filtering, amplifying circuit constitute with R1, R2, R3, R4, R5, R6 and comparator.
Above-mentioned said central data treatment circuit comprises: dsp chip, power management module, crystal oscillating circuit and data/address bus drive circuit; Utilizing the software program of compiling to set various executive conditions controls dsp chips the input signal of data bus driving circuits is carried out identification, handles and send relevant control command; Power management module is responsible for providing electric energy; Crystal oscillating circuit provides clock signal to dsp chip; The data/address bus drive circuit mainly is responsible for data buffering and level conversion.
Above-mentioned said dsp chip comprises big capacity flash memory, a plurality of 32 bit timing devices, 2 task managers and SPI, SCI, CAN multiple interfaces, and 12 road PWM control waves are provided; Power management module is made of dual power supply device and peripheral resistance R 15, R16, C1, C2 electric capacity; Crystal oscillating circuit is made of the capacitor C 3 that clock signal is provided to dsp chip, C4 and crystal oscillator body U2; The data/address bus drive circuit is made of a slice bidirectional data buffer device; After the digital quantity that upper end A/D transducer will transform gained receives DSP, to data compensate, behind the digital filtering, corresponding corresponding standard value is converted into per unit value, computing draws the action setting value, and produces three-phase and amount to 3 control signals.
Above-mentioned said communication and keyboard display module belong to the manual operation module of this system; This type of keyboard often adopts determinant keyboard, works in interrupt mode, be used for realizing adjusting of various protection parameters, and the functions such as input of control signal; In order to show Chinese character and figure, can adopt liquid-crystal controller.
Operation principle of the present utility model: this system utilizes control unit that the electric current in the circuit on power system is monitored.Signal shaping conversion process circuit is transformed to transmission line voltage transformer secondary side voltage and current sensors secondary side current than the low amplitude value alternating voltage, and being sent to after the processing with DSP is in the central data treatment circuit of core.The counter of setting DSP is the time counter of timing sampling, the data processing subprogram concentrates in the interrupt service subroutine of this time counter, and to give its interrupt priority level be system's superlative degree, can avoid data processing to be interrupted like this, thereby guarantee the real-time and the accuracy of sampled data by other interruptions.In data processing module, collect discrete electric current and voltage amount after, most important one the step be the instantaneous parameters of accurate Calculation electrical network.During operate as normal, the final controlling element of relaying protection (being circuit breaker) is in closure state, and system is in normal operating condition.When detecting the electric current instantaneous mutation, the sudden change of this moment may hinder for some reason and causes, also may be because the switching of some device or normal manual operation cause.In the magnitude of current of sudden change; except first-harmonic and each harmonic component; also may contain very big attenuating dc component and zero-sequence component; adopt improved fast Fourier algorithm at this; according to current effective value in the circuit; the equivalent impedance of the feature of harmonic component and this moment; the central data treatment circuit calculates the operating value of protective device according to certain control law; provide the circuit breaker control signal; according to different control strategies; after the regular hour postpones; judge the effective value size of electric current etc. once more, send second control signal, thereby control cut-offfing of circuit breaker to circuit breaker.
Superiority of the present utility model and technique effect are: utilize the high performance digital signal process chip to realize the control of relaying protection action, the reliability and the rapidity of relaying protection action have been improved to a great extent, the control hysteresis that has overcome FPGA (Field Programmable Gate Array) control technology and common singlechip chip technical finesse speed limit and caused, the untimely defective of action, make the The whole control device have good adjusting function and reliability, reduce the probability that gets the accidents such as stopping production that malfunction or tripping bring because of relaying protection, and then strengthened the stability of electrical network; Adopt improved fast Fourier algorithm; can directly calculate DC component and the amplitude of each harmonic and the characteristics of phase angle of input signal by list entries; simplified the calculating of harmonic analysis greatly; amount of calculation is little, precision is high; and DSP is applied in the control device of relaying protection; give full play to high-speed data computing capability and the pinpoint accuracy data-handling capacity of DSP; must move final controlling element to relaying protection and carry out dual signal control; its hardware circuit is simple, precision of real time control is high, has wide technology application prospect.
(4) description of drawings:
Accompanying drawing 1 is the module composition diagram in the utility model related " the relaying protection control device that fast Fourier algorithm combines with the DSP technology ".
(Fig. 2-a is voltage, electric current alternating current sampling circuit to accompanying drawing 2 for the data acquisition circuit in the utility model related " the relaying protection control device that fast Fourier algorithm combines with the DSP technology "; Fig. 2-b is filtering, amplifying circuit).
Accompanying drawing 3 is the central data treatment circuit structural representation in the utility model related " the relaying protection control device that fast Fourier algorithm combines with the DSP technology ".
(5) embodiment:
Embodiment: the relaying protection control device (see figure 1) that a kind of fast Fourier algorithm combines with the DSP technology, it is characterized in that it by processor module, Analog Data Acquistion Module, open into leaving interface module, communication module, power module and keyboard display module six parts and form; The input of said Analog Data Acquistion Module connects external voltage instrument transformer summation current transformer, and its output connects the input of central data treatment circuit; Saidly leave interface module is connected to DSP after photoelectric coupler isolation universaling I/O port, switching value is drawn through photoelectrical coupler by universaling I/O port, exit and electrical equipment; Said power module outlet connects the central data processor module, is the dsp chip power supply; The output of central processing module connects the input of communication module and keyboard display module respectively.
Above-mentioned said Analog Data Acquistion Module (see figure 2) is made up of voltage, electric current AC sampling front-end circuit and filtering, amplifying circuit; The AC sampling front-end circuit is with voltage, the current signal gathered, through being transformed to the small voltage amount behind the secondary voltage current transformer, the small voltage amount is through filter circuit, behind the voltage amplifier circuit, conversion A/D converter acceptable voltage range, voltage become centrifugal pump and deposit among the RAM of control device after over-sampling, A/D conversion; Filter circuit adopts step low-pass active filter.
Above-mentioned said voltage, electric current AC sampling front-end circuit (are seen and Fig. 2-a) constitute the input saturation protection with D11, D12, D21, D22 are constituted instrument transformer phase shift compensation and rc filter circuit with R24, R25, R26, R34, R35, R36, C11, C12, C16, C17; Said filtering, amplifying circuit (see that Fig. 2-b) usefulness R1, R2, R3, R4, R5, R6 and comparator LF353 constitute.
Above-mentioned said central data treatment circuit (see figure 3) comprises: dsp chip, power management module, crystal oscillating circuit and data/address bus drive circuit; Utilizing the software program of compiling to set various executive conditions controls dsp chips the input signal of data bus driving circuits is carried out identification, handles and send relevant control command; Power management module is responsible for providing electric energy; Crystal oscillating circuit provides clock signal to dsp chip; The data/address bus drive circuit mainly is responsible for data buffering and level conversion.
Above-mentioned said dsp chip (see figure 3) comprises big capacity flash memory, a plurality of 32 bit timing devices, 2 task managers and SPI, SCI, CAN multiple interfaces, and 12 road PWM control waves are provided; Power management module is made of dual power supply device TPS73HD301 and peripheral resistance R 15, R16, C1, C2 electric capacity; Crystal oscillating circuit is made of the capacitor C 3 that clock signal is provided to dsp chip, C4 and crystal oscillator body U2; The data/address bus drive circuit is made of a slice bidirectional data buffer device 74LVC16245; After the digital quantity that upper end A/D transducer will transform gained receives DSP, to data compensate, behind the digital filtering, corresponding corresponding standard value is converted into per unit value, computing draws the action setting value, and produces three-phase and amount to 3 control signals.
Above-mentioned said communication and keyboard display module belong to the manual operation module of this system; This type of keyboard often adopts determinant keyboard, works in interrupt mode, be used for realizing adjusting of various protection parameters, and the functions such as input of control signal; In order to show Chinese character and figure, can adopt liquid-crystal controller.
Claims (7)
1, the relaying protection control device that combines with the DSP technology of a kind of fast Fourier algorithm, it is characterized in that it by processor module, Analog Data Acquistion Module, open into leaving interface module, communication module, power module and keyboard display module six parts and form; The input of said Analog Data Acquistion Module connects external voltage instrument transformer summation current transformer, and its output connects the input of central data treatment circuit; Saidly leave interface module is connected to DSP after photoelectric coupler isolation universaling I/O port, switching value is drawn through photoelectrical coupler by universaling I/O port, exit and electrical equipment; Said power module outlet connects the central data processor module, is the dsp chip power supply; The output of central processing module connects the input of communication module and keyboard display module respectively.
2, the relaying protection control device that combines with the DSP technology according to said a kind of fast Fourier algorithm in the claim 1 is characterized in that said Analog Data Acquistion Module is made up of voltage, electric current AC sampling front-end circuit and filtering, amplifying circuit; The AC sampling front-end circuit is with voltage, the current signal gathered, through being transformed to the small voltage amount behind the secondary voltage current transformer, the small voltage amount is through filter circuit, behind the voltage amplifier circuit, conversion A/D converter acceptable voltage range, voltage becomes the centrifugal pump village in the RAM of control device after over-sampling, A/D conversion; Filter circuit adopts step low-pass active filter.
3, the relaying protection control device that combines with the DSP technology according to said a kind of fast Fourier algorithm in the claim 2, it is characterized in that said voltage, electric current AC sampling front-end circuit constitute the input saturation protection with D11, D12, D21, D22, constitute instrument transformer phase shift compensation and rc filter circuit with R24, R25, R26, R34, R35, R36, C11, C12, C16, C17;
4, the relaying protection control device that combines with the DSP technology according to said a kind of fast Fourier algorithm in the claim 2 is characterized in that filtering, amplifying circuit constitute with R1, R2, R3, R4, R5, R6 and comparator.
5, the relaying protection control device that combines with the DSP technology according to said a kind of fast Fourier algorithm in the claim 1 is characterized in that said central data treatment circuit comprises: dsp chip, power management module, crystal oscillating circuit and data/address bus drive circuit; Utilizing the software program of compiling to set various executive conditions controls dsp chips the input signal of data bus driving circuits is carried out identification, handles and send relevant control command; Power management module is responsible for providing electric energy; Crystal oscillating circuit provides clock signal to dsp chip; The data/address bus drive circuit mainly is responsible for data buffering and level conversion.
6, the relaying protection control device that combines with the DSP technology according to said a kind of fast Fourier algorithm in the claim 5, it is characterized in that said dsp chip comprises big capacity flash memory, a plurality of 32 bit timing devices, 2 task managers and SPI, SCI, CAN multiple interfaces, provides 12 road PWM control waves; Power management module is made of dual power supply device TPS73HD301 and peripheral resistance R 15, R16, C1, C2 electric capacity; Crystal oscillating circuit is made of the capacitor C 3 that clock signal is provided to dsp chip, C4 and crystal oscillator body U2.The data/address bus drive circuit is made of a slice bidirectional data buffer device 74LVC16245; This circuit working process is: after the digital quantity that A/D is transformed gained receives DSP, to data compensate, behind the digital filtering, corresponding corresponding standard value is converted into per unit value, computing draws the action setting value, and produces three-phase and amount to 3 control signals.
7, the relaying protection control device that combines with the DSP technology according to said a kind of fast Fourier algorithm in the claim 1 is characterized in that said communication and keyboard display module belong to the manual operation module of this device; This type of keyboard often adopts determinant keyboard, works in interrupt mode, be used for realizing adjusting of various protection parameters, and the functions such as input of control signal; In order to show Chinese character and figure, can adopt liquid-crystal controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201239232U CN2904431Y (en) | 2005-12-12 | 2005-12-12 | Relay protection controller of fast Fourier algorithm and DSP Tech. combination |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201239232U CN2904431Y (en) | 2005-12-12 | 2005-12-12 | Relay protection controller of fast Fourier algorithm and DSP Tech. combination |
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| CN2904431Y true CN2904431Y (en) | 2007-05-23 |
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| CNU2005201239232U Expired - Fee Related CN2904431Y (en) | 2005-12-12 | 2005-12-12 | Relay protection controller of fast Fourier algorithm and DSP Tech. combination |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860080A (en) * | 2010-05-18 | 2010-10-13 | 武汉国测科技股份有限公司 | Distribution network metering and protection integral device suspended at high-voltage side |
| CN111722556A (en) * | 2020-05-12 | 2020-09-29 | 广州市扬新技术研究有限责任公司 | Switch cabinet intelligent terminal integrating protection, control and online monitoring |
-
2005
- 2005-12-12 CN CNU2005201239232U patent/CN2904431Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860080A (en) * | 2010-05-18 | 2010-10-13 | 武汉国测科技股份有限公司 | Distribution network metering and protection integral device suspended at high-voltage side |
| CN101860080B (en) * | 2010-05-18 | 2012-07-04 | 武汉国测科技股份有限公司 | Distribution network metering and protection integral device suspended at high-voltage side |
| CN111722556A (en) * | 2020-05-12 | 2020-09-29 | 广州市扬新技术研究有限责任公司 | Switch cabinet intelligent terminal integrating protection, control and online monitoring |
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| CF01 | Termination of patent right due to non-payment of annual fee |