CN103761577A - Capacitive type device auxiliary decision making system based on risk assessment and condition evaluation - Google Patents
Capacitive type device auxiliary decision making system based on risk assessment and condition evaluation Download PDFInfo
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Abstract
The invention discloses a capacitive type device auxiliary decision making system based on risk assessment and condition evaluation. The capacitive type device auxiliary decision making system comprises a data center composed of a line monitoring system, a technical supervision system, a dispatching SCADA system and a production MIS. The capacitive type device auxiliary decision making system is characterized in that the capacitive type device auxiliary decision making system further comprises a data acquisition interface module, a kernel processing module, a core service module condition assessment interface module and the like, wherein the data acquisition interface module is connected with the data center and used for acquiring data. The system is a layering and centralized framework, and defines the composition, an interface and a communication entity of a layering in details. An event trigger mechanism and a universal model with the data storage function are utilized, the requirements for data operation and processing of various devices are met, and the capacitive type device auxiliary decision making system has high cohesion and loose coupling performance. Related data are introduced into the system on the basis of a device condition evaluation guide rule and a risk assessment guide rule, and the risk degree of the device can be judged by judging the change of a dielectric loss angle of a capacitive type device; the device condition can be automatically evaluated, the working efficiency of launching the condition evaluation of the device is greatly improved, and meanwhile the misjudgment caused by excessive judgments in which people are involved is reduced.
Description
Technical field
The present invention relates to a kind of research and application of intelligent grid mesohigh Condition-based Maintenance of Substation Equipment, particularly relate to a kind of high voltage capacitive-type equipment O&M strategy aid decision-making system.
Background technology
In recent years, along with the quick expansion of electrical network scale, system large area blackout happens occasionally, and the impact of single equipment fault is not only confined to self, may be extended to even total system of regional power grid.Therefore, in maintenance decision, only consider that equipment self affects and is not counted in its impact on system, can not meet the requirement of system safety operation.The diverse location of the equipment that takes into full account in system, the difference of failure effect size, introduce risk assessment and can take into account security and economy, risk is introduced and in state estimation, can well be weighed the impact that equipment oneself state and equipment failure bring, and therefore risk assessment is a kind of service technique of comprehensive and reasonable more.
The research of the state based on risk assessment comes from petrochemical industry the earliest, risk assessment in the application of power industry still in the starting stage.At present, only utilize severity index to carry out evaluating system risk, utilize self-defining severity function respectively computational scheme overload, low-voltage, Voltage Instability and cascading failure etc. simple risk indicator, and these work focus mostly in theoretical analysis, complete practical implementation lack of experience; Do not build the Decision-making of Condition-based Maintenance system of complete capacitance type equipment based on risk yet.
On the other hand, dielectric dissipation factor
it is an important indicator that characterizes capacitance type equipment insulation situation.Wherein
refer to that dielectric loss angle is under alternating electric field, the complementary angle of the angle between current vector and the voltage vector flowing through in dielectric.Dielectric dissipation factor tan δ is the characteristic parameter of reflection insulation dielectric loss size, practical experience shows, for the capacitance type equipment of small volume, measure its integral insulation dielectric dissipation factor expansionary local defect in discovering device, apparatus insulated make moist and deteriorated rotten etc. more delicately.Thereby, measure tan δ very important for the state of insulation that judges capacitance type equipment.Meanwhile, because Electric Equipment Dielectric Loss angle is a small value, the harmonious wave interference of on-the-spot frequency shift (FS) is easy to affect it, even floods its actual value, must find high performance accurate measurement method.
As at present, measuring media loss angle can be divided into hardware method and Software Method.Hardware method mainly contains zero passage relative method, bridge balance method etc., the shortcoming such as these class methods exist that hardware handles link is many, poor anti jamming capability, cumulative errors are large; Harmonic analysis method is current main software analysis method, and its principle, based on Fourier transform, is utilized orthogonality of trigonometric function to make to solve fundametal compoment and is not subject to the impact of harmonic wave and direct current, therefore can reach higher stability and measuring accuracy.Feature based on sinusoidal signal itself and digital spectrum analysis theory are known, only have signal meeting integer-period sampled and blocking calculating complete cycle and just can accurately realize signal Spectrum Analysis, otherwise there will be spectrum leakage and fence effect, make result of calculation occur larger error, especially phase error is larger.In reality, mains frequency fluctuates often, and the sample frequency of sampling apparatus is difficult to remain on accurately the integral multiple of mains frequency, and this also makes to obtain the sample blocking complete cycle.
Summary of the invention
The object of the present invention is to provide a kind of capacitance type equipment aid decision-making system based on risk assessment and state evaluation, this system is take equipment state assessment guidelines and risk assessment guide rule as foundation, utilize system related data, the variation of dielectric loss angle by judging capacitance type equipment is with judgment device risk size, realize the automatic Evaluation that equipment state is evaluated, greatly raising equipment is carried out state evaluation work efficiency, and the mistake judge causing is passed judgment in minimizing simultaneously too much artificial participation.
The present invention realizes above-mentioned purpose by the following technical solutions:
A capacitance type equipment aid decision-making system based on risk assessment and state evaluation, it comprises the data center that line monitoring system, technical supervision system, SCADA dispatching system and production MIS form, and characterized by further comprising:
Be connected with described data center, and obtain the data acquisition interface module of data;
Input end is connected with described data acquisition interface module output terminal, the kernel processes module being mainly comprised of data processing engine and guide rule processing engine;
From described kernel processes module obtain and process capacitance type equipment in real time/characteristic parameter of historical data and reflection equipment working condition state, the current dielectric loss angle of computing equipment, the risk evaluation module of prediction medium future developing trend;
Be connected with described kernel processes module, comprise data acquisition submodule, data processing service submodule, quantity of state monitoring and warning submodule, health evaluating submodule, maintenance decision submodule, risk assessment submodule, and form the core business module of layer architecture;
From described kernel processes module obtaining information, comprise chart maker, report form generator and various common controls composition, and make respectively the status information integrally exhibiting module of two-way communication with described core business module and dielectric loss angle risk evaluation module;
For described status information integrally exhibiting module provides work apparatus, the aid module mainly being formed by regular modeling tool, form modeling tool, chart modeling tool, management tool;
The maintenance aid decision making result output module that information input terminal is connected with described status information integrally exhibiting module output terminal, its output store status evaluation result.
Described data acquisition interface module possesses the MMS ability to communicate of IEC 61850, and meeting under the prerequisite of electric power secondary system security protection regulation, information interactive bus has by just/oppositely physical isolation apparatus leap production management infosystem great Qu, realizes the information interaction with data center.
Described kernel processes module is mainly comprised of data processing engine, guide rule processing engine, wherein, data processing engine according to the demand data of assessment guidelines from external system extracted data, and the flexible form configuration data treatment scheme that adopts configuration file to describe, realize the flexible definition of quantity of state and computing method thereof, to adapt to the needs of professional technique development; Guide rule processing engine is responsible for parse state evaluation model, and the concrete calculating evaluated of completion status, and the state evaluation guide rule that guide rule processing engine should be able to flexible configuration various kinds of equipment, supports to carry out state evaluation by equipment, parts.
Described dielectric loss angle risk evaluation module is using three-phase voltage signal as phase reference signal, and three-phase current signal and reference signal phase angle are required; First voltage signal and current signal are removed to DC component in time domain, secondly by signal power analysis of spectrum in frequency domain, thereby and according to gravitational law, fundamental frequency correction is accurately drawn to signal fundamental frequency; Then with spline method, primary voltage, current signal are carried out to interpolation calculation, and carry out resampling complete cycle; Finally according to fast Fourier algorithm, try to achieve the phase place angle of each harmonic voltage and electric current, thereby draw dielectric loss angle; According to numerical value change situation, carry out risk assessment simultaneously.
Between its each framework layer of described core business module, adopt the data bus technology based on action listener mechanism to communicate, major function comprises: obtain and process capacitance type equipment relevant rudimentary data, equipment in real time/characteristic parameter of the reflection equipment health status such as historical data, valuator device present health condition, predict future development trend; Deteriorated and the bad timely issued state early warning information of equipment of trend to state, and carry out the analysis of effective fault mode and reason; By the model analysis of complex optimum Strategies of Maintenance, maintenance decision suggestion is proposed, instruct the concrete enforcement of repair based on condition of component work; According to state evaluation model, computing equipment value-at-risk, quantizes state evaluation result, and for equipment O&M, department provides decision-making foundation.
Described status information integrally exhibiting module is mainly comprised of chart maker, report form generator, various common controls, and wherein, chart maker can be followed according to user's the flexible configuration that needs and be defined all kinds of professional charts, and powerful chart generation technique is provided; Report form generator can define various kinds of equipment appraisal report flexibly, meets the needs of various technological layers to report; Common controls comprises the conventional key elements that represent such as general machine account, test figure, label, menu, index tree, help window, realization represents the flexible of form, ways of presentation is described by configuration file, without writing specific webpage, meets assembly type and can plug software design idea.
Described aid module, for system management and the structure of the capacitance type equipment aid decision-making system based on risk assessment and state evaluation, can need according to state decision business the management such as implementation rule modeling, form modeling, chart modeling.
Described maintenance aid decision making result output module is realized capacitance type equipment state estimation, Strategies of Maintenance is formulated result of calculation external system is exported and stored.
A kind of capacitance type equipment aid decision-making system based on risk assessment and state evaluation of above structure, this system adopts layering, centralized architecture; Composition, interface and the communication entity thereof of specific definition layering, utilize event trigger mechanism, has the universal model of data storage, meets the needs to multi-class device data operation and processing, has high cohesion, loose couplings.And take equipment state assessment guidelines and risk assessment guide rule as foundation, utilize system related data, the variation of dielectric loss angle by judging capacitance type equipment is with judgment device risk size, realize the automatic Evaluation that equipment state is evaluated, greatly raising equipment is carried out state evaluation work efficiency, and the mistake judge causing is passed judgment in minimizing simultaneously too much artificial participation.Outstanding advantages of the present invention is:
1, overcome the deficiency of existing capacitance type equipment medium consumption factor accurate Calculation, propose one capacitance type equipment dielectric dissipation factor computing method accurately and efficiently.
2, by considering the variation of capacitive device medium loss angle, there is risk in real time reaction equipment, constantly revises data and improve equipment state assessment accuracy.
3, consider the data such as on-line monitoring system, technical supervision system, production MIS, reduction apparatus state truly, guarantees to improve the comprehensive of equipment state assessment and Decision-making of Condition-based Maintenance basic data.
Accompanying drawing explanation
Fig. 1 is block diagram of the present invention.
Fig. 2 is the schematic flow sheet that risk assessment of the present invention is calculated.
Embodiment
Below in conjunction with accompanying drawing and example, the present invention is described in detail.The present embodiment is implemented as prerequisite take technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, capacitance type equipment aid decision-making system based on risk assessment and state evaluation of the present invention, comprises data acquisition interface module 1, kernel processes module 2, core business module 3, dielectric loss angle risk evaluation module 4, status information integrally exhibiting module 5, aid module 6, maintenance aid decision making result output module 7.Wherein, the signal input part of data acquisition interface module 1 is connected with comprising the data center that line monitoring system, technical supervision system, SCADA dispatching system and production MIS form, and signal output part is connected with the signal input part of kernel processes module 2; The signal output part of kernel processes module 2 is connected with the signal input part of core business module 3, dielectric loss angle risk evaluation module 4 and status information integrally exhibiting module 5; It between core business module 3 and status information integrally exhibiting module 5, is two-way communication; In like manner, between status information integrally exhibiting module 5 and dielectric loss angle risk evaluation module 4, be also two-way communication; Aid module 6 provides work apparatus for described status information integrally exhibiting module 5; The related data that maintenance aid decision making result output module 7 extracts in status information integrally exhibiting module 5, and carry out external system output and storage.Wherein:
Data acquisition interface module 1 is by the relevant floor data of MMS communication modes access dispatching SCAD system, production MIS, technical supervision system and the on-line monitoring system of IEC 61850, and by telecommunication cable, is sent to kernel processes module 2 and processes.
The data that kernel processes module 2 accesses data acquisition interface module 1 by data processing engine, guide rule processing engine are carried out state evaluation.
The capacitance type equipment Monitoring Data that dielectric loss angle risk evaluation module 3 accesses data acquisition interface module 1 by the capacitance type equipment medium consumption factor Method for Accurate Calculation based on fundamental frequency correction principle is carried out dielectric loss angle calculating and risk assessment.
Core business module 4 by obtain and deal with data obtain capacitance type equipment relevant rudimentary data that interface module 1 accesses, equipment in real time/characteristic parameter of the reflection equipment health status such as historical data, valuator device the present situation, predict future development trend, quantizes state evaluation result.Core business module 4 adopts layer architecture, each layer comprises data acquisition submodule, data processing service submodule, quantity of state monitoring and warning submodule, health evaluating submodule, maintenance decision submodule, risk assessment submodule, the configurable and capable of dynamic migration of each program module.
The result of calculation of data, dielectric loss angle risk evaluation module 3 and core business module 4 that status information integrally exhibiting module 5 accesses data acquisition interface module 1 is shown.
Aid module 6 is carried out the management such as regular modeling, form modeling, chart modeling to status information integrally exhibiting module 5.
State estimation, Decision-making of Condition-based Maintenance calculation result data that maintenance aid decision making result output module 7 extracts in status information integrally exhibiting module 5, and carry out external system output and storage.
Above data acquisition interface module 1, kernel processes module 2, core business module 3, dielectric loss angle risk evaluation module 4, status information integrally exhibiting module 5, aid module 6 and maintenance aid decision making result output module 7 are prior art and product, or for those skilled in the art is according to prior art with need easily design and make.
As shown in Figure 2, the calculating of dielectric loss angle risk assessment is using three-phase voltage signal as phase reference signal for the calculation process of dielectric loss angle risk assessment, and three-phase current signal and reference signal phase angle are required.First voltage signal and current signal are removed to DC component in time domain; Secondly by signal power analysis of spectrum in frequency domain, thereby and according to gravitational law, fundamental frequency correction is accurately drawn to signal fundamental frequency; Then with spline method, primary voltage, current signal are carried out to interpolation calculation, and carry out resampling complete cycle; Finally according to fast Fourier algorithm, try to achieve the phase place angle of each harmonic voltage and electric current, thereby draw medium consumption factor.
Above-mentioned computing method, specifically adopt following steps to realize:
Voltage signal and current signal are removed to DC component in time domain;
Voltage, the current signal removed after DC quantity are carried out to power spectrumanalysis in frequency domain, and accurately measure signal fundamental frequency according to energy principle of moment;
Voltage, current signal are added to Hanning self-convolution window function and carry out power spectrumanalysis, obtain many discrete power spectrum spectral lines.
After above-mentioned steps completes, make the amplitude of peak power spectrum spectral line be
, horizontal ordinate is
; With season the
the amplitude of root spectral line is
, the
the amplitude of root spectral line is
;
After above-mentioned steps completes, if
, fundamental frequency formula adopts formula (1) so:
If
, first-harmonic frequency of amendment formula adopts formula (2) so;
Adopt spline method to carry out interpolation calculation to primary voltage, current signal;
In interval
, following equation (3) has defined output interpolation y;
Wherein:
;
;
After above-mentioned steps completes, voltage, current signal are carried out to resampling complete cycle
After above-mentioned steps completes, intercept the sample of length complete cycle, according to fast Fourier algorithm, try to achieve the phase place angle of fundamental voltage and electric current.
The complementary angle that further calculates fundamental voltage and fundamental current phase place angle is as dielectric loss angle δ, and the tangent of then obtaining dielectric loss angle δ obtains dielectric dissipation factor tan δ, and carries out risk assessment according to result of calculation.
Principle of work and process are: the capacitance type equipment aid decision-making system based on risk assessment and state evaluation is take equipment state assessment guidelines and risk assessment guide rule as foundation, and access SCADA system, mis system, technical supervision system and on-line monitoring system related data, and the variation of passing through the dielectric loss angle that judges capacitance type equipment is with judgment device risk size; By above result of calculation, realize the automatic Evaluation that equipment state is evaluated, greatly raising equipment is carried out state evaluation work efficiency, and the mistake judge causing is passed judgment in minimizing simultaneously too much artificial participation.Because system is carried out complete deployment in For Provincial Power Grid Corporation, districts and cities, comprise that teams and groups and net province are with inquire about per family the functions such as maintenance aid decision making result under specified right by interconnected network mode login system.
Dielectric loss angle
can reflect capacitance type equipment insulation power attenuation size, especially sensitiveer to the insulating property compared with skinny device, be the key index whether capacitance type equipment exists risk.The dielectric loss angle of accurately measuring electrical equipment has great importance to the safe and stable operation of electric system.For example, when capacitor type bushing shell for transformer medium consumption factor tan δ value exceeds the numerical value in table 1 in the time of 20 ℃, should take following measures:
Table 1 capacitor type bushing shell for transformer medium consumption factor tan δ value demand value
1, find out immediately test data abnormal cause, whether checkout device exists extremely simultaneously;
2, shorten the preventive trial cycle;
3, adopt infrared thermal imaging detection mode, check whether sleeve pipe exists temperature anomaly;
4, check whether sleeve pipe oil level exists extremely;
5, if desired to the sleeve pipe test that has a power failure, test request is as follows:
(1) the tan δ of oilpaper condenser bushing does not generally carry out temperature conversion, when tan δ with dispatch from the factory test value or last test value relatively rises appreciably or while approaching the listed numerical value of upper table, should comprehensively analyze the relation of tan δ and temperature, voltage.When tan δ increases and obviously increases or when trial voltage is raised to highest voltage for equipment (Um)/3 by 10kV with temperature, tan δ increment exceedes ± and 0.3%, should not continue operation.
(2) during measuring transformer sleeve pipe tan δ, all winding terminals that are connected with the tested sleeve pipe pressurization that connects together, the equal ground connection of remaining winding terminal, bottom shielding of bushing connects electric bridge, and positive wiring is measured.
(3) to the condenser bushing that possesses test condition, can replace with live testing electric capacity and tan δ
6,, after ascertaining the reason, according to circumstances take the processing modes such as maintenance, replacing.
Claims (8)
1. the capacitance type equipment aid decision-making system based on risk assessment and state evaluation, it comprises the data center that line monitoring system, technical supervision system, SCADA dispatching system and production MIS form, and characterized by further comprising:
Be connected with described data center, and obtain the data acquisition interface module (1) of data;
Input end is connected with described data acquisition interface module (1) output terminal, the kernel processes module (2) being mainly comprised of data processing engine and guide rule processing engine;
From described kernel processes module (2) obtain and process capacitance type equipment in real time/characteristic parameter of historical data and reflection equipment working condition state, the current dielectric loss angle of computing equipment, the risk evaluation module (4) of prediction medium future developing trend;
Be connected with described kernel processes module (2), comprise data acquisition submodule, data processing service submodule, quantity of state monitoring and warning submodule, health evaluating submodule, maintenance decision submodule, risk assessment submodule, and form the core business module (3) of layer architecture;
From described kernel processes module (2) obtaining information, comprise chart maker, report form generator and various common controls composition, and make respectively the status information integrally exhibiting module (5) of two-way communication with described core business module (3) and dielectric loss angle risk evaluation module (4);
For described status information integrally exhibiting module (5) provides work apparatus, the aid module (6) mainly being formed by regular modeling tool, form modeling tool, chart modeling tool, management tool;
The maintenance aid decision making result output module (7) that information input terminal is connected with described status information integrally exhibiting module (5) output terminal, its output store status evaluation result.
2. the capacitance type equipment aid decision-making system based on risk assessment and state evaluation according to claim 1, is characterized in that:
The MMS ability to communicate of the standby IEC 61850 of described data acquisition interface module tool (1), and meeting under the prerequisite of electric power secondary system security protection regulation, information interactive bus has by just/oppositely physical isolation apparatus leap production management infosystem great Qu, realizes the information interaction with data center.
3. the capacitance type equipment aid decision-making system based on risk assessment and state evaluation according to claim 1, is characterized in that:
Described kernel processes module (2) is mainly comprised of data processing engine, guide rule processing engine, wherein, data processing engine according to the demand data of assessment guidelines from external system extracted data, and the flexible form configuration data treatment scheme that adopts configuration file to describe, realize the flexible definition of quantity of state and computing method thereof, to adapt to the needs of professional technique development; Guide rule processing engine is responsible for parse state evaluation model, and the concrete calculating evaluated of completion status, and the state evaluation guide rule that guide rule processing engine should be able to flexible configuration various kinds of equipment, supports to carry out state evaluation by equipment, parts.
4. the capacitance type equipment aid decision-making system based on risk assessment and state evaluation according to claim 1, is characterized in that:
Described dielectric loss angle risk evaluation module (4) is using three-phase voltage signal as phase reference signal, and three-phase current signal and reference signal phase angle are required; First voltage signal and current signal are removed to DC component in time domain, secondly by signal power analysis of spectrum in frequency domain, thereby and according to gravitational law, fundamental frequency correction is accurately drawn to signal fundamental frequency; Then with spline method, primary voltage, current signal are carried out to interpolation calculation, and carry out resampling complete cycle; Finally according to fast Fourier algorithm, try to achieve the phase place angle of each harmonic voltage and electric current, thereby draw dielectric loss angle; According to numerical value change situation, carry out risk assessment simultaneously.
5. the capacitance type equipment aid decision-making system based on risk assessment and state evaluation according to claim 1, is characterized in that:
Between described its each framework layer of core business module (3), adopt the data bus technology based on action listener mechanism to communicate, major function comprises: obtain and process capacitance type equipment relevant rudimentary data, equipment in real time/characteristic parameter of the reflection equipment health status such as historical data, valuator device present health condition, predict future development trend; Deteriorated and the bad timely issued state early warning information of equipment of trend to state, and carry out the analysis of effective fault mode and reason; By the model analysis of complex optimum Strategies of Maintenance, maintenance decision suggestion is proposed, instruct the concrete enforcement of repair based on condition of component work; According to state evaluation model, computing equipment value-at-risk, quantizes state evaluation result, and for equipment O&M, department provides decision-making foundation.
6. the capacitance type equipment aid decision-making system based on risk assessment and state evaluation according to claim 1, is characterized in that:
Described status information integrally exhibiting module (5) is mainly comprised of chart maker, report form generator, various common controls, wherein, chart maker can be followed according to user's the flexible configuration that needs and be defined all kinds of professional charts, and powerful chart generation technique is provided; Report form generator can define various kinds of equipment appraisal report flexibly, meets the needs of various technological layers to report; Common controls comprises the conventional key elements that represent such as general machine account, test figure, label, menu, index tree, help window, realization represents the flexible of form, ways of presentation is described by configuration file, without writing specific webpage, meets assembly type and can plug software design idea.
7. the capacitance type equipment aid decision-making system based on risk assessment and state evaluation according to claim 1, is characterized in that:
Described aid module (6), for system management and the structure of the capacitance type equipment aid decision-making system based on risk assessment and state evaluation, can need according to state decision business the management such as implementation rule modeling, form modeling, chart modeling.
8. the capacitance type equipment aid decision-making system based on risk assessment and state evaluation according to claim 1, is characterized in that:
Described maintenance aid decision making result output module (7) is realized capacitance type equipment state estimation, Strategies of Maintenance is formulated result of calculation external system is exported and stored.
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| CN107861001A (en) * | 2017-11-02 | 2018-03-30 | 国网重庆市电力公司电力科学研究院 | Intelligent substation closes the capacitor method for evaluating reliability of intelligence integrated device, system |
| CN108763916A (en) * | 2018-06-05 | 2018-11-06 | 阿里巴巴集团控股有限公司 | Business interface safety evaluation method and device |
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Cited By (5)
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| CN104076219A (en) * | 2014-07-10 | 2014-10-01 | 国网山西省电力公司电力科学研究院 | System for evaluating state of electric transmission and transformation equipment based on ring topological structure |
| CN107861001A (en) * | 2017-11-02 | 2018-03-30 | 国网重庆市电力公司电力科学研究院 | Intelligent substation closes the capacitor method for evaluating reliability of intelligence integrated device, system |
| CN108763916A (en) * | 2018-06-05 | 2018-11-06 | 阿里巴巴集团控股有限公司 | Business interface safety evaluation method and device |
| CN109256723A (en) * | 2018-11-07 | 2019-01-22 | 天津航天中为数据系统科技有限公司 | A kind of integrated power transmission line intelligent machine of transmitting electricity in vacant lot patrols operating system and method |
| CN115509192A (en) * | 2022-09-29 | 2022-12-23 | 南方电网调峰调频发电有限公司西部检修试验分公司 | Machine learning-based auxiliary monitoring system for equipment running state |
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