CN101227080A - Control circuit of protective-relay device and operating method thereof - Google Patents
Control circuit of protective-relay device and operating method thereof Download PDFInfo
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- CN101227080A CN101227080A CNA200710150681XA CN200710150681A CN101227080A CN 101227080 A CN101227080 A CN 101227080A CN A200710150681X A CNA200710150681X A CN A200710150681XA CN 200710150681 A CN200710150681 A CN 200710150681A CN 101227080 A CN101227080 A CN 101227080A
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Abstract
The invention discloses a control circuit of a relay protection device and a method for operation, wherein the control circuit comprises a center data processor module, an analog quantity data collection module, an opening-inserting opening-excluding interface module, a communication module, a power module and a keyboard display module. The operation method comprises the following steps: 1) signal gathering stage, 2) signal deforming and changing stage, 3) timely sampling time counter setting stage, 4) electric net instantaneous parameter calculating stage, 5) current condition detecting stage, 6) the center data process module judges and controls a relay protection device breaking stage. The beneficial effect of the invention is characterized by utilizing digital signal process chip to realize relay protection movement control, improving relay protection reliability and rapidness, overcoming control lag and movement and non-timely defect induced by programmable logic control technique and common single-set chip process speed limit, having good adjustability and reliability and reducing the probability of production halt due to relay protection false operation or rejection.
Description
Technical field
What the present invention relates to is protective relaying device in the electric power system, particularly be the control circuit and the method for operation thereof of protective relaying device.
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.
In protective relaying device, the link of most critical is the extraction and the identification of fault information.Microcomputer Protection is realized with the power frequency amount basically at present, also uses secondary, three times or quintuple harmonics in some protection, and in order to obtain above-mentioned component from fault message, Fourier transform is a highly effective instrument, and has obtained to use widely.But for signal some sudden changes, that have singularity, Fourier transform is powerless, this be because Fourier transform be the analytical method of pure frequency domain, it on time domain without any resolution capability.
Fast development along with power industry; the capacity and the scale of distribution system increase day by day; requirement to relay protection control system also improves constantly; it requires control section in the protective relaying device to make reasonable parameter according to the difference of the difference of the difference of fault type, system running state and harmonic effects to adjust, to adapt to fast-developing electric utility.Therefore; control circuit has been difficult to satisfy the performance requirement of modern industry in traditional protective relaying device; people thirst for a kind of novel control circuit and method of operation thereof occurring at protective relaying device, especially a kind of adaptable relay protection control system and method for operation thereof.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned technology, a kind of high-performance digital signal processor that utilizes is provided, realize fast, the control circuit and the method for operation thereof of high accuracy, protective relaying device that the harmonic wave adaptive capacity is strong
The detailed technology scheme that solves the problems of the technologies described above is:
A kind of control circuit of protective relaying device, described control circuit comprises: central data processor module, Analog Data Acquistion Module, open into leaving interface module, communication module, power module and keyboard display module; The input of described Analog Data Acquistion Module connects the voltage measurement signal and the current measurement signal of electric power system, and the Analog Data Acquistion Module output connects the input of central data processing module; Described opening into leaving the two-way connection central data processor of interface module output module opened into the two-way connection power consumption equipment of the input of leaving interface module; Described power module outlet connects the central data processing module; Described communication module and the two-way output that is connected the central data processing module of keyboard display module input.
The invention provides a kind of method of operation with control circuit of above-mentioned protective relaying device, described method of operation comprised as the next stage:
1). signal acquisition stage: voltage signal, the current signal of Analog Data Acquistion Module collection input;
2). to acquired signal shaping conversion stages: with above-mentioned acquired signal shaping conversion process is than the low amplitude value alternating voltage, is sent in the central data processing module;
3). set the timing sampling time counter stage: the counter of setting digital signal processor 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;
4). calculate the instantaneous parameters stage of electrical network: the central data processing module is calculated the instantaneous parameters of electrical network according to collecting discrete electric current and voltage amount;
5). detect the current status stage: when detecting current signal and be in the setting value, system is in normal operating condition; When detecting the electric current instantaneous mutation, digital signal processor sends control signal;
6). the central data processing module is judged and controlled cut-offfing the stage of protective relaying device: the capable ripple that produces along with fault arrives the detection bus successively, travelling wave signal presents " sudden change ", the position that its conversion occurs is consistent with " catastrophe point ", can find position of failure point rapidly; The central data treatment circuit provides the protective relaying device control signal, delayed after, judge current effective value once more, send second control signal to circuit breaker, thereby control the cut-offfing of protective relaying device.
The invention has the beneficial effects as follows: the present invention utilizes 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 whole control system 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 wavelet theory to carry out multiscale analysis, have very strong feature extraction functions signal, particularly evident to the processing advantage of jump signal.Wavelet transformation has the evolution of time-frequency localization and multiscale analysis, has overcome the shortcoming that Fourier transform can not localize and analyze signal on time domain, thereby will be widely used in failure diagnosis.And digital signal processor is applied in the control system of relaying protection; give full play to the high-speed data computing capability and the pinpoint accuracy data-handling capacity of digital signal processor; 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.
Description of drawings
Fig. 1 is that control circuit of the present invention connects block diagram;
Fig. 2 is that the circuit of Analog Data Acquistion Module among Fig. 1 connects block diagram;
Fig. 3 is that Fig. 1 central data processor modular circuit connects block diagram.
" sequence number explanation in the accompanying drawing ":
1: central data processing module 2: communication module 3: keyboard display module
4: Analog Data Acquistion Module 5: open into leaving module 6: power module
7: power consumption equipment 8: voltage alternating current sampling circuit 9: the electric current alternating current sampling circuit
10: filter circuit 11: amplifying circuit 12: the data/address bus drive circuit
13: crystal oscillating circuit 14: digital signal processor 15a: voltage measurement signal
15b: current measurement signal
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Fig. 1 is that control circuit of the present invention connects block diagram.
As shown in Figure 1, a kind of control circuit of protective relaying device, described control circuit comprises: central data processor module 1, Analog Data Acquistion Module 4, open into leaving interface module 5, communication module 2, power module 6 and keyboard display module 3; The input of described Analog Data Acquistion Module 4 connects the voltage measurement signal 15a and the current measurement signal 15b of electric power system, and Analog Data Acquistion Module 4 outputs connect the input of central data processing module 1; Described opening into leaving the two-way connection central data processor of interface module 5 outputs module 1 opened into the two-way connection power consumption equipment 7 of the input of leaving interface module 5; Described power module 6 outputs connect central data processing module 1; Described communication module 2 and the two-way output that is connected central data processing module 1 of keyboard display module 3 inputs.
Explain clearly into leaving the two-way connection central data processor of interface module 5 outputs module 1 is: open into leaving the switching value universaling I/O port that interface module 5 is connected to the digital signal processor 14 in the central data processor module 1; Explain clearly into leaving the two-way connection power consumption equipment 7 of interface module 5 outputs is: open into leaving interface module 5 and draw connection power consumption equipment 7 through its inner photoelectrical coupler.
Said power module 6 output termination central data processor modules 1 are to be its digital signal processor inside 14 chip power supplies.
Above-mentioned communication module 2 and keyboard display module 3 belong to the manual operation module of this system, form by determinant keyboard (figure does not show) and LCD (figure does not show), the output of keyboard connects the input of central data processor module 1, and the input of LCD connects the demonstration output of central data processor module 1.Keyboard is used for realizing the functions such as input of adjusting of various protection parameters and control signal; Adopt liquid crystal display displays Chinese character and figure.
Fig. 2 is that the circuit of Analog Data Acquistion Module among Fig. 1 connects block diagram.
As shown in Figure 2, described Analog Data Acquistion Module 4 comprises: voltage alternating current sampling circuit 8, electric current alternating current sampling circuit 9, filter circuit 10 and amplifying circuit 11; Described voltage measurement signal 15a and current measurement signal 15b are connected respectively to the input of voltage alternating current sampling circuit 8 and electric current alternating current sampling circuit 9, the output of voltage alternating current sampling circuit 8 and electric current alternating current sampling circuit 9 all is connected to the input of filter circuit 10 separately, the output of filter circuit 10 is connected respectively to the input of amplifying circuit 11, and the output of amplifying circuit 11 all is connected to the input of central data processor module 1.
Described voltage alternating current sampling circuit 8, electric current alternating current sampling circuit 9 are transformed to the small voltage amount with voltage signal, the current signal of gathering, the small voltage amount is transformed to central data processor module 1 inner A/D converter acceptable voltage range behind filter circuit 10, amplifying circuit 11; Above-mentioned filter circuit 10 adopts step low-pass active filter.
Fig. 3 is that Fig. 1 central data processor modular circuit connects block diagram.
As shown in Figure 3, described central data processor module 1 comprises: digital signal processor 14, crystal oscillating circuit 13 and data/address bus drive circuit 12; The output of data/address bus drive circuit 12 is connected to digital signal processor 14; The output of crystal oscillating circuit 13 is connected to digital signal processor 14.
Above-mentioned central data processor module 1 is carried out identification, processing by the output signal of 14 pairs of data bus driving circuits 12 of its digital signal processor inside, and sends relevant control command; Crystal oscillating circuit 13 provides clock signal to digital signal processor 14; Data/address bus drive circuit 12 main data buffering and the level conversion be responsible for.
Described digital signal processor 14 is the chip of TMS320F2812 for model.Crystal oscillating circuit 13 is made of electric capacity and crystal oscillator body; Data/address bus drive circuit 12 is that the bidirectional data buffer device of 74LVC16245 constitutes by a slice model.
The present invention also provides a kind of method of operation with control circuit of described protective relaying device, and described method of operation comprised as the next stage:
1). signal acquisition stage: Analog Data Acquistion Module 4 is gathered voltage signal, the current signal of input;
2). to acquired signal shaping conversion stages: with above-mentioned acquired signal shaping conversion process is than the low amplitude value alternating voltage, is sent in the central data processing module 1;
3). set the timing sampling time counter stage: the counter of setting digital signal processor 14 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, avoided data processing to be interrupted, thereby guaranteed the real-time and the accuracy of sampled data by other interruptions;
4). calculate the instantaneous parameters stage of electrical network: central data processing module 1 is calculated the instantaneous parameters of electrical network according to collecting discrete electric current and voltage amount;
5). detect the current status stage: when detecting current signal and be in the setting value, system is in normal operating condition; When detecting the electric current instantaneous mutation, digital signal processor 14 sends control signal and gives circuit breaker;
6). the central data processing module is judged and controlled cut-offfing the stage of protective relaying device: the capable ripple that produces along with fault arrives the detection bus successively, travelling wave signal presents " sudden change ", signal corresponding to " sudden change ", adopt wavelet theory to analyze, modulus maximum appears in its wavelet transformation, the position of its modulus maximum is consistent with " catastrophe point ", can find position of failure point rapidly; The central data treatment circuit provides the protective relaying device control signal, after the regular hour postpones, judges the effective value size of electric current once more, sends second control signal to circuit breaker, thereby controls cut-offfing of protective relaying device.
Claims (4)
1. the control circuit of a protective relaying device, it is characterized in that described control circuit comprises: central data processor module (1), Analog Data Acquistion Module (4), open into leaving interface module (5), communication module (2), power module (6) and keyboard display module (3); The input of described Analog Data Acquistion Module (4) connects the voltage measurement signal (15a) and the current measurement signal (15b) of electric power system, and Analog Data Acquistion Module (4) output connects the input of central data processing module (1); Described opening into leaving interface module (5) output two-way connection central data processor module (1) opened into the two-way connection power consumption equipment of the input of leaving interface module (5) (7); Described power module (6) output connects central data processing module (1); Described communication module (2) and the two-way output that is connected central data processing module (1) of keyboard display module (3) input.
2. according to the control circuit of protective relaying device described in claims 1, it is characterized in that described Analog Data Acquistion Module (4) comprising: voltage alternating current sampling circuit (8), electric current alternating current sampling circuit (9) and filter circuit (10), amplifying circuit (11); Described voltage measurement signal (15a) and current measurement signal (15b) are connected respectively to the input of voltage alternating current sampling circuit (8) and electric current alternating current sampling circuit (9), the output of voltage alternating current sampling circuit (8) and electric current alternating current sampling circuit (9) is connected respectively to the input of filter circuit (10), the output of filter circuit (10) is connected respectively to the input of amplifying circuit (11), and the output of amplifying circuit (11) all is connected to the input of central data processor module (1).
3. according to the control circuit of protective relaying device described in claims 1, it is characterized in that described central data processor module (1) comprising: digital signal processor (14), crystal oscillating circuit (13) and data/address bus drive circuit (12); The output of data/address bus drive circuit (12) is connected to digital signal processor (14); The output of crystal oscillating circuit (13) is connected to digital signal processor (14); Described digital signal processor (14) is that model is the chip of TMS320F2812.
4. the method for operation with control circuit of protective relaying device described in the claim 1 is characterized in that, described method of operation comprised as the next stage:
1). signal acquisition stage: Analog Data Acquistion Module (4) is gathered voltage signal, the current signal of input;
2). to acquired signal shaping conversion stages: with above-mentioned acquired signal shaping conversion process is than the low amplitude value alternating voltage, is sent in the central data processing module (1);
3). set the timing sampling time counter stage: the counter of setting digital signal processor (14) 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;
4). calculate the instantaneous parameters stage of electrical network: central data processing module (1) is calculated the instantaneous parameters of electrical network according to collecting discrete electric current and voltage amount;
5). detect the current status stage: when detecting current signal and be in the setting value, system is in normal operating condition; When detecting the electric current instantaneous mutation, digital signal processor (14) sends control signal;
6). the central data processing module is judged and controlled cut-offfing the stage of protective relaying device: the capable ripple that produces along with fault arrives the detection bus successively, travelling wave signal presents " sudden change ", the position that its conversion occurs is consistent with " catastrophe point ", can find position of failure point rapidly; The central data treatment circuit provides the protective relaying device control signal, delayed after, judge current effective value once more, send second control signal to circuit breaker, thereby control the cut-offfing of protective relaying device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710150681XA CN101227080A (en) | 2007-12-03 | 2007-12-03 | Control circuit of protective-relay device and operating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710150681XA CN101227080A (en) | 2007-12-03 | 2007-12-03 | Control circuit of protective-relay device and operating method thereof |
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| CN101227080A true CN101227080A (en) | 2008-07-23 |
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| CNA200710150681XA Pending CN101227080A (en) | 2007-12-03 | 2007-12-03 | Control circuit of protective-relay device and operating method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917066A (en) * | 2010-08-13 | 2010-12-15 | 浙江省电力公司 | On-line monitoring outdoor acquisition device for relay protection of power system |
| CN101718841B (en) * | 2009-12-02 | 2012-07-11 | 江苏方天电力技术有限公司 | Automatic checking system and method of relaying protection device |
| CN103676735A (en) * | 2013-11-30 | 2014-03-26 | 许继电气股份有限公司 | Intelligent electrical device |
| CN104283197A (en) * | 2014-10-27 | 2015-01-14 | 四川蓝讯宝迩电子科技有限公司 | Relay protection system |
| CN104917157A (en) * | 2015-05-22 | 2015-09-16 | 中国南方电网有限责任公司超高压输电公司曲靖局 | Earthing pole bus differential protection switching-on/off state judgment method |
-
2007
- 2007-12-03 CN CNA200710150681XA patent/CN101227080A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718841B (en) * | 2009-12-02 | 2012-07-11 | 江苏方天电力技术有限公司 | Automatic checking system and method of relaying protection device |
| CN101917066A (en) * | 2010-08-13 | 2010-12-15 | 浙江省电力公司 | On-line monitoring outdoor acquisition device for relay protection of power system |
| CN101917066B (en) * | 2010-08-13 | 2012-07-04 | 浙江省电力公司 | On-line monitoring outdoor acquisition device for relay protection of power system |
| CN103676735A (en) * | 2013-11-30 | 2014-03-26 | 许继电气股份有限公司 | Intelligent electrical device |
| CN104283197A (en) * | 2014-10-27 | 2015-01-14 | 四川蓝讯宝迩电子科技有限公司 | Relay protection system |
| CN104283197B (en) * | 2014-10-27 | 2017-05-10 | 浙江中新电力发展集团有限公司 | Relay protection system |
| CN104917157A (en) * | 2015-05-22 | 2015-09-16 | 中国南方电网有限责任公司超高压输电公司曲靖局 | Earthing pole bus differential protection switching-on/off state judgment method |
| CN104917157B (en) * | 2015-05-22 | 2017-12-01 | 中国南方电网有限责任公司超高压输电公司曲靖局 | A kind of earthing pole bus differential protecting is thrown and moves back condition judgement method |
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Open date: 20080723 |