CN103457657A - Method for detecting states of optical module of relay protection device of intelligent substation - Google Patents
Method for detecting states of optical module of relay protection device of intelligent substation Download PDFInfo
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- CN103457657A CN103457657A CN2013104199039A CN201310419903A CN103457657A CN 103457657 A CN103457657 A CN 103457657A CN 2013104199039 A CN2013104199039 A CN 2013104199039A CN 201310419903 A CN201310419903 A CN 201310419903A CN 103457657 A CN103457657 A CN 103457657A
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Abstract
The invention relates to a method for detecting states of an optical module of a relay protection device of an intelligent substation. The optical power relative degradation rates of the relative degradation degree reflecting the comparison of actual states and fault states is obtained according to obtained optical power values, a distribution function of the optical power relative degradation rates corresponding to different state grades is structured, membership grade values of the optical power relative degradation rates belonging to all the state grades are obtained, and the state grade corresponding to the maximum membership grade value is regarded as the current state of the optical power relative degradation rate and displayed. By means of the method for detecting the states of the optical module of the relay protection device of the intelligent substation, the states in which the optical module is in can be displayed directly, the types of the states can be set as good states, general states, attention states and serious states, operation personnel can take corresponding measures directly according to the states of the optical module, the detection is carried out before faults occur, and the faults can be prevented from occurring in time.
Description
Technical field
The invention belongs to intelligent substation protective relaying device state inspection field, relate to a kind of intelligent substation protective relaying device optical module condition detection method.
Background technology
At present, the maintenance model of intelligent substation relaying protection is, according to the requirement of " relaying protection and power grid security automatics check regulations ", device and secondary circuit wiring are carried out to periodic inspection.The regular inspection mode has significant limitation: if on the one hand protection system breaks down between twice maintenance, can only wait defencive function to lose efficacy or etc. verification next time could find, had a strong impact on the reliability of system; On the other hand, periodic inspection has consumed a large amount of manpower and materials, has increased the overall life cycle cost of system, and the simultaneously power failure of maintenance process has reduced the utilization rate of equipment, has increased meaningless interruption duration.For realizing the relaying protection repair based on condition of component, need protective relaying device to increase the information of on-line monitoring.At present secondary equipment of intelligent converting station itself has possessed the part self-checking function, but monitoring information is comprehensive not, and monitoring range relatively limits to, and can't meet the requirement of repair based on condition of component.
Intelligent substation has been realized the digitlization of information, and the problem of conventional relaying protection external circuit does not exist, and the health status of process layer optical fiber circuit will be as the emphasis of operation monitoring.Mainly by protective device, the data communication to application layer is monitored the existing means that optical fiber circuit is monitored; warning information comprises " SMV link down ", " GOOSE link down ", " SMV sample frame losing " etc.; after above-mentioned warning information occurs, network breaks down; now protective device is out of service, can't be in advance the state of optical fiber circuit be monitored.
The light mouth luminous power that is exactly mainly the device optical module to the monitoring of light circuit is monitored, the luminous power instantaneous value is the reaction unit state intuitively, after delivering to supervisory control system on these luminous power data, the operations staff can't judge according to the luminous power instantaneous value health status of current device, therefore needs a kind of detection by optical power value to carry out the method for reaction unit optical module state health status.The name that application number is 201010589693.4 is called the method for real-time that " method that realizes the channel status Real-Time Monitoring by the on-line measurement luminous power " discloses a kind of optical-fibre channel device of electric motor protecting, at first the method needs the current signal that the luminous power measured is corresponding to carry out the I-U conversion, utilize and measure in advance optical module luminous power---luminous power data, adopt curve fitting technique to obtain corresponding optical power value, then the power threshold of optical power value and setting is compared, send the channel abnormal alarm, this detection mode is that a kind of online state to optical fiber circuit is monitored, but need carry out multiple conversion process to the optical power value detected and obtain optical power value, the method complexity, not only increased the optical module hardware setting, increased the weight of the CPU processing load, and easily produce error.
Summary of the invention
The purpose of this invention is to provide a kind of intelligent substation protective relaying device optical module condition detection method, with solve existing method can't be in advance to the state of optical fiber circuit monitored and complicated, easily produce error, inefficient problem.
For achieving the above object, intelligent substation protective relaying device optical module condition detection method step of the present invention is as follows:
(1) obtain the current optical power value of the corresponding light mouth of optical module, and set the luminous power good value of this light mouth and allow minimum value;
(2) try to achieve the relative deteriorated rate of luminous power according to luminous power good value, permission minimum value with current optical power value, the relatively deteriorated rate of this luminous power means the relative degradation that virtual condition is compared with malfunction;
(3) combination based on triangle, trapezoidal shape, set up the piecewise function of the relatively deteriorated rate of luminous power corresponding to the different conditions grade;
(4) by relatively deteriorated each piecewise function of rate substitution of luminous power, try to achieve the degree of membership value that the relatively deteriorated rate of luminous power belongs to each state grade, and corresponding state grade shows as the current state of the relatively deteriorated rate of this luminous power using the maximum membership degree value.
Obtaining of optical power value is, by the measuring light power circuit, detected optical power signals is sent to CPU in described step (1), and CPU carries out corresponding process and obtains.
The relatively deteriorated rate of luminous power=(luminous power good value-current optical power value)/(luminous power good value-permission minimum value) in described step (2).
In described step (3), state grade comprises kilter, general state, attention state and serious state.
In described step (3), the relatively deteriorated rate of luminous power is as follows corresponding to the piecewise function of different conditions grade:
The function of kilter:
The function of general state:
The function of attention state:
The function of serious state:
Wherein, s means the relatively deteriorated rate of light intensity, a
1, a
2, a
3, a
4for definite value, and s, a
1, a
2, a
3, a
4all belong in 0～1 scope.
Described a
1=0.2, a
2=0.4, a
3=0.6, a
4=0.8.
Described step (4) afterwards also in steps (5) carry out the corresponding corresponding treatment measures that provide according to the state shown.
Intelligent substation protective relaying device optical module condition detection method of the present invention, try to achieve the relatively deteriorated rate of luminous power of the relative degradation compared with malfunction of reaction virtual condition according to the luminous power degree value of obtaining, and the relatively deteriorated rate of structure luminous power is corresponding to the distribution function of different conditions grade, try to achieve the relatively deteriorated rate of luminous power and belong to the degree of membership value of each state grade, and corresponding state grade shows as the current state of the relatively deteriorated rate of this luminous power using the maximum membership degree value; Can directly show the residing state of optical module by the method, the setting of Status Type can distinguish well, general, note and serious state, the operations staff can directly take appropriate measures according to the optical module state, be the detection of carrying out before fault occurs, and can avoid in time the generation of fault.This method is calculated luminous power the relatively deteriorated rate of luminous power, then calculate the functional value (degree of membership) of luminous power with respect to various states according to different function of states, can obtain the current state of luminous power, this method is compared realization more simply and be there is no error with the method provided in background technology.
The accompanying drawing explanation
Fig. 1 is the function of four kinds of states corresponding to the relatively deteriorated rate of luminous power;
Fig. 2 is the detection system schematic diagram of the embodiment of the present invention.
Embodiment
The luminous power that is exactly mainly optical module light mouth to the monitoring of optical fiber circuit is monitored; but only see that the luminous power instantaneous value can not judge the health status of current device, therefore need a kind of intelligent substation protective relaying device optical module condition detection method correctly to reflect the ruuning situation of device optical fiber circuit.
Intelligent substation protective relaying device optical module condition detection method step is as follows:
(1) obtain the current optical power value of the corresponding light mouth of optical module, and set the luminous power good value of this light mouth and allow minimum value; Obtaining of optical power value is, by the measuring light power circuit, detected optical power signals is sent to CPU, and CPU carries out corresponding process and obtains.
(2) try to achieve the relative deteriorated rate of luminous power according to luminous power good value, permission minimum value with current optical power value, the relative degradation that the relatively deteriorated rate reflection of this luminous power virtual condition is compared with malfunction; The relatively deteriorated rate of luminous power=(luminous power good value-current optical power value)/(luminous power good value-permission minimum value), the relatively deteriorated rate of luminous power is to understand aging gradually characteristics to propose according to light mouth luminous power after device puts into operation.Luminous power good value and permission minimum value are the parameter known quantities according to optical module, the currency of luminous power is the data that collected by device CPU Real-Time Monitoring, before plant failure, luminous power is a process gradually changed, when luminous power moves closer to the permission minimum value, operation guarder person has obtained warning information in advance, realizes detecting in advance.
(3) combination based on triangle, trapezoidal shape, set up the piecewise function of the relatively deteriorated rate of luminous power corresponding to kilter, general state, attention state and serious these four kinds of state grades of state, as shown in Figure 1;
The function of kilter:
The function of general state:
The function of attention state:
The function of serious state:
Wherein, s means the relatively deteriorated rate of light intensity, a
1, a
2, a
3, a
4for definite value, and s, a
1, a
2, a
3, a
4all belong in 0～1 scope.
(4) by relatively deteriorated each piecewise function of rate substitution of luminous power, try to achieve the degree of membership value that the relatively deteriorated rate of luminous power belongs to each state grade, and corresponding state grade shows as the current state of the relatively deteriorated rate of this luminous power using the maximum membership degree value.
(5) carry out the corresponding corresponding treatment measures that provide according to the state shown.
Below provide a concrete example and describe this intelligent substation protective relaying device optical module condition detection method in detail.
Protective relaying device process layer interface card disposes optical module, and the optical module electronic devices and components comprise and transmit and receive two parts.The reception of optical module and the luminous power of transmission all can diminish in time gradually, and main cause comprises: the long-play device can be aging gradually with optical fiber, and it is large that the loss of optical fiber becomes gradually; The threshold current of device optical module laser can slowly increase, thereby causes laser to be degenerated.
In order to gather optical module sending and receiving luminous power, need on the basis of former fiber optic circuit, build again a complete measuring light power circuit, optical module possesses the output function of reception/transmitting optical power, circuit is connected to CPU card by the luminous power information of optical module output, detected optical power signals is sent to CPU, complete reading of Back ground Information by CPU, then carry out information coding, decoding and unit conversion (the luminous power unit of optical module output is that μ w need to be transformed into dBM), finally supervisory control system will be delivered on optical power value, completed the assessment of every table apparatus luminous power by supervisory control system, as shown in Figure 2.
If laboratory to intelligent substation in the light mouth luminous power of three kinds of different relaying protections measure, measurement data is as following table:
The formula of the relatively deteriorated rate of luminous power: the relatively deteriorated rate s=(luminous power of luminous power good value-current optical power value)/(luminous power good value-permission minimum value).Luminous power good value and permission minimum value are to send the minimum receiving sensitivity setting of light mouth parameter and recipient's device reception light mouth according to optical module, when light intensity is equal to or less than minimum sensitivity, the offside device can not receive that light signal will quote information such as " GOOSE interruptions ", break down, the meaning of this time mouth monitoring has not been too large, the major function of light mouth monitoring is to predict in advance and remove fault when also not breaking down, therefore not there will be the light intensity currency to be greater than the light intensity good value or the light intensity currency is less than the situation that allows minimum value.Get-14dBm of transmitting optical power good value, allow get-20dBm of minimum value; Get-14dBm of received optical power good value, allow get-32dBm of minimum value.The relatively deteriorated rate that can calculate each light mouth according to above formula is as following table:
If a
1=0.2, a
2=0.4, a
3=0.6, a
4=0.8, by the relation function of the relatively deteriorated rate of the following luminous power of relatively deteriorated rate substitution of above-mentioned luminous power:
The function of kilter:
The function of general state:
The function of attention state:
The function of serious state:
Can draw respectively the membership values of the corresponding four kinds of states of each light mouth, get the peaked current state of light mouth that is.
The transmission mouth of route protection light mouth 1 of take is example, by the above-mentioned four groups of functions of s=0.18 substitution, draws respectively U
1=1, U
2=-0.1, U
3=0, U
4=0, maximum is U
1=1, therefore, the transmission mouth of this route protection is in kilter.If the light mouth is in attention state or serious state, the operations staff need to be added to pay close attention to or report to the police to overhaul and process.
Claims (7)
1. intelligent substation protective relaying device optical module condition detection method, is characterized in that, the step of the method is as follows:
(1) obtain the current luminous power degree value of the corresponding light mouth of optical module, and set the luminous power good value of this light mouth and allow minimum value;
(2) try to achieve the relative deteriorated rate of luminous power according to luminous power good value, permission minimum value with current luminous power degree value, the relatively deteriorated rate of this luminous power means the relative degradation that virtual condition is compared with malfunction;
(3) combination based on triangle, trapezoidal shape, set up the piecewise function of the relatively deteriorated rate of luminous power corresponding to the different conditions grade;
(4) by relatively deteriorated each piecewise function of rate substitution of luminous power, try to achieve the degree of membership value that the relatively deteriorated rate of luminous power belongs to each state grade, and corresponding state grade shows as the current state of the relatively deteriorated rate of this luminous power using the maximum membership degree value.
2. intelligent substation protective relaying device optical module condition detection method according to claim 1; it is characterized in that; obtaining of luminous power degree value is, by the measuring light power circuit, detected optical power signals is sent to CPU in described step (1), and CPU carries out corresponding process and obtains.
3. intelligent substation protective relaying device optical module condition detection method according to claim 1, is characterized in that: the relatively deteriorated rate of luminous power in described step (2)=(luminous power good value-current luminous power degree value)/(luminous power good value-permission minimum value).
4. intelligent substation protective relaying device optical module condition detection method according to claim 1 is characterized in that: in described step (3), state grade comprises kilter, general state, attention state and serious state.
5. intelligent substation protective relaying device optical module condition detection method according to claim 4, is characterized in that, in described step (3), the relatively deteriorated rate of luminous power is as follows corresponding to the piecewise function of different conditions grade:
The function of kilter:
The function of general state:
The function of attention state:
The function of serious state:
Wherein, s means the relatively deteriorated rate of light intensity, a
1, a
2, a
3, a
4for definite value, and s, a
1, a
2, a
3, a
4all belong in 0～1 scope.
6. intelligent substation protective relaying device optical module condition detection method according to claim 5, is characterized in that: described a
1=0.2, a
2=0.4, a
3=0.6, a
4=0.8.
7. according to the described intelligent substation protective relaying device of any one optical module condition detection method in claim 1-6, it is characterized in that: described step (4) afterwards also in steps (5) carry out the corresponding corresponding treatment measures that provide according to the state shown.
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| CN104504607A (en) * | 2014-09-04 | 2015-04-08 | 国家电网公司 | Method for diagnosing photovoltaic power station faults on the basis of fuzzy clustering algorithm |
| CN108011662A (en) * | 2017-12-12 | 2018-05-08 | 青岛海信宽带多媒体技术有限公司 | A kind of optical module and its monitoring method |
| CN108449133A (en) * | 2018-03-20 | 2018-08-24 | 贵州电网有限责任公司六盘水供电局 | A kind of intelligent substation luminous power test method |
| WO2021115445A1 (en) * | 2019-12-12 | 2021-06-17 | 中兴通讯股份有限公司 | Method, system and apparatus for testing degradation of optical module, and storage medium |
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Cited By (7)
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Effective date of registration: 20151010 Address after: No. 1298 Xuchang City, Henan province 461000 XJ Avenue Applicant after: Xuji Group Co., Ltd. Applicant after: Xuji Electric Co., Ltd. Applicant after: Xuchang Xuji Software Technology Co., Ltd. Applicant after: State Grid Zhejiang Electric Power Company Applicant after: State Grid Corporation of China Address before: No. 1298 Xuchang City, Henan province 461000 XJ Avenue Applicant before: Xuji Group Co., Ltd. Applicant before: Xuji Electric Co., Ltd. Applicant before: Xuchang Xuji Software Technology Co., Ltd. |
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