阅读说明：本技术 铁心电抗器匝绝缘故障定位方法及在线监测系统 (Iron-core reactor turn insulation Fault Locating Method and on-line monitoring system ) 是由 刘骥 王守明 马志钦 朱东柏 张明泽 于 2019-08-29 设计创作，主要内容包括：铁心电抗器匝绝缘故障定位方法及在线监测系统。目前电抗器的在线监测装置多针对电抗器的电压、电流、损耗值及表面温度等参数,出现事故后对电抗器整体进行分解切割寻找匝绝缘故障部位,耗时耗力,定位效果并不明显。本发明包括如下步骤：(1)确定待测电抗器的系统电压等级及电抗器线圈的结构参数；(2)确定上下两端霍尔磁场强度监测单元的摆放位置以及相对电抗器线圈距离；(3)根据上下两端霍尔磁场强度监测单元监测的数据判断匝绝缘短路故障是否发生；(4)利用映射定位算法对匝绝缘短路故障点进行定位。本发明用于铁心电抗器匝绝缘故障的定位及在线监测。(Iron-core reactor turn insulation Fault Locating Method and on-line monitoring system.The on-Line Monitor Device spininess of reactor integrally carries out reactor to decompose cutting searching turn insulation trouble location, take time and effort, locating effect is not obvious to parameters such as the voltage of reactor, electric current, loss value and surface temperatures after there is accident at present.The present invention includes the following steps: that (1) determines the system voltage grade of reactor to be measured and the structural parameters of reactor winding；(2) placement position of upper and lower ends Hall magnetic field intensity monitoring unit is determined and with respect to reactor winding distance；(3) judge whether turn insulation short trouble occurs according to the data that upper and lower ends Hall magnetic field intensity monitoring unit monitors；(4) turn insulation short circuit trouble point is positioned using mapped location algorithm.Positioning and on-line monitoring of the present invention for iron-core reactor turn insulation failure.)

1. a kind of iron-core reactor turn insulation Fault Locating Method, it is characterized in that: this method comprises the following steps:

(1) the system voltage grade of reactor to be measured and the structural parameters of reactor winding are determined；

(2) placement position of upper and lower ends Hall magnetic field intensity monitoring unit is determined and with respect to reactor winding distance；

(3) judge whether turn insulation short trouble occurs according to the data that upper and lower ends Hall magnetic field intensity monitoring unit monitors；

(4) turn insulation short circuit trouble point is positioned using mapped location algorithm.

2. iron-core reactor turn insulation Fault Locating Method according to claim 1, it is characterized in that: the step (2) Detailed process are as follows: according to the system voltage grade of the reactor to be measured, referring to optimal level distance reference table, in determination The level of lower both ends Hall magnetic field intensity monitoring cell distance reactor winding outer surface puts distance.According to reactor height H, It determines that vertical direction of the upper and lower ends Hall magnetic field intensity monitoring module apart from reactor puts distance, keeps upper end Hall magnetic field strong Monitoring modular and reactor hanging are spent, lower end Hall magnetic field intensity sensor is aligned with reactor bottom end.

3. iron-core reactor turn insulation Fault Locating Method according to claim 1, it is characterized in that: the step (4) Detailed process include: reactor not short-circuit circle coil and short dot axial mapping；

The foundation of two-dimensional plane coordinate system after mapping；Reactor whole coil and short-circuit point voltage's distribiuting establishing equation；Up and down Magnetic field strength establishing equation at the monitoring point of both ends；Turn insulation is determined in conjunction with magnetic field strength date resolving inversely is surveyed at monitoring point Short circuit trouble point coordinate.

4. iron-core reactor turn insulation Fault Locating Method according to claim 3, it is characterized in that: the reactor is not Axially mapping is that short-circuit circle coil is focused to a short dot for short-circuit circle coil and short dot, and reactor winding is divided into reactor Not short-circuit circle coil 1, short dot 2 after short circuit are axially, to be mapped one by one with iron core, can be according in this algorithm after mapping Mapping relations obtain mapping mutual inductance.

5. iron-core reactor turn insulation Fault Locating Method according to claim 3, it is characterized in that: two after the mapping The foundation of dimensional plane coordinate system is to use coil 1 and short-circuit circle coil short point 2 and its mapping using reactor center point as origin Relative coordinate expression, and it is short in conjunction with the field strength value progress turn insulation at the reactor winding voltage's distribiuting and monitoring point Road localization of fault parsing, to carry out precise positioning.

6. iron-core reactor turn insulation Fault Locating Method according to claim 1, it is characterized in that: the step (3) Detailed process are as follows: the synchronous monitoring data for obtaining upper and lower ends Hall magnetic field intensity sensor judge whether to occur obvious prominent Become；If it is not, proving that turn insulation short trouble does not occur, continue to obtain upper and lower ends Hall magnetic field intensity monitoring data；If It is that turn insulation short trouble then occurs.

7. a kind of iron-core reactor turn insulation On-line Fault monitors system, composition includes: the monitoring of Hall magnetic field intensity sensor Unit, high-speed AD signal acquisition unit, signal sampling window filtering unit, signal proportion reduction conditioning unit, CPU main control unit and Data wireless transmission unit, it is characterized in that: the Hall magnetic field intensity sensor monitoring unit, the high-speed AD signal are adopted Collect unit, the signal sampling window filtering unit, the signal proportion reduction conditioning unit and the CPU main control unit And data wireless transmission unit is sequentially connected.

8. iron-core reactor turn insulation On-line Fault according to claim 7 monitors system, it is characterized in that: the signal Sample window filter unit is used for the continuous multi-point sampling of signal and filter in window, and continuous high speed samples in a sample window No less than 5 data points, judge whether accidentally to adopt noise jamming due to capacitive coupling into, point deletion will be interfered in sample window, will Valid data point carries out average value processing, to obtain analog quantity output valve after preliminary treatment.

9. iron-core reactor turn insulation On-line Fault according to claim 7 monitors system, it is characterized in that: the signal Ratio reduction conditioning unit is used to analog quantity output valve after preliminary treatment being reduced to field strength value in proportion, if after sampling Analog quantity mean value be V_i, reduction ratio coefficient is K₁, bias reference constant is α, and system constant error is δ, magnetic field at monitoring point Intensity is B_i, then.After parsingTurn insulation short trouble is judged whether there is for the later period to occur And carry out turn insulation short trouble point location.

Technical field:

The present invention relates to reactor monitoring technical fields, and in particular to a kind of iron-core reactor turn insulation Fault Locating Method and Line monitoring system.

Background technique:

Iron-core reactor obtains in 10 ~ 35kV power distribution network due to having many advantages, such as that small in size, leakage field is small and coil is not easy to crack To increasingly extensive application.In recent years the safety of stablizing that all kinds of failures of the iron core reactor frequently occurred directly injure power grid is transported Row, the turn insulation problem of the cored overheat of typical failure and winding, wherein statistical analysis shows that accounting compared with major break down is mostly circle Caused by insulation defect.After turn insulation short circuit, forming circulation can make the temperature rise nearby of coil short circle increase severely, and further develop meeting Entire reactor winding is caused to burn.Thus find a kind of iron-core reactor turn insulation Fault Locating Method and on-line monitoring system It is very necessary.

The on-Line Monitor Device spininess of reactor joins the voltage of reactor, electric current, loss value and surface temperature etc. at present Number, and the positioning and the on-line monitoring country to the turn insulation short trouble of its iron-core reactor are still blank out.All it is often Reactor is integrally carried out after appearance accident to decompose cutting searching turn insulation trouble location, is taken time and effort, locating effect is simultaneously unknown It is aobvious.Therefore, it carries out real-time monitoring to turn insulation short trouble and carries out anticipation to be very necessary, discovery turn insulation short trouble Afterwards, precise positioning is carried out to it, formulates reasonable O&M Strategies of Maintenance, and then improved reactor and run qualitative and reliability.

Summary of the invention:

Present invention aim to address the problems of turn insulation Fault Locating Method and on-line monitoring systems, and providing one kind can The high dependency to hardware testing circuit is substantially reduced, data of monitoring point and correlation map at two up and down after only relying on acquisition Coordinate parameters can carry out the iron-core reactor turn insulation Fault Locating Method of precise positioning to reactor turn insulation failure to be measured And on-line monitoring system.

Above-mentioned purpose is realized by following technical scheme:

A kind of iron-core reactor turn insulation Fault Locating Method, this method comprises the following steps:

(1) the system voltage grade of reactor to be measured and the structural parameters of reactor winding are determined；

(2) placement position of upper and lower ends Hall magnetic field intensity monitoring unit is determined and with respect to reactor winding distance；

(3) judge whether turn insulation short trouble occurs according to the data that upper and lower ends Hall magnetic field intensity monitoring unit monitors；

(4) turn insulation short circuit trouble point is positioned using mapped location algorithm.

The iron-core reactor turn insulation Fault Locating Method, the detailed process of the step (2) are as follows: according to described The system voltage grade of reactor to be measured determine that upper and lower ends Hall magnetic field intensity is supervised referring to optimal level distance reference table The level for surveying cell distance reactor winding outer surface puts distance.According to reactor height H, upper and lower ends Hall magnetic field is determined Vertical direction of the intensity monitoring module apart from reactor puts distance, makes upper end Hall magnetic field intensity monitoring module and reactor top End alignment, lower end Hall magnetic field intensity sensor are aligned with reactor bottom end.

The iron-core reactor turn insulation Fault Locating Method, the detailed process of the step (4) includes: reactor Not short-circuit circle coil and short dot axial mapping；

The foundation of two-dimensional plane coordinate system after mapping；Reactor whole coil and short-circuit point voltage's distribiuting establishing equation；Up and down Magnetic field strength establishing equation at the monitoring point of both ends；Turn insulation is determined in conjunction with magnetic field strength date resolving inversely is surveyed at monitoring point Short circuit trouble point coordinate.

The iron-core reactor turn insulation Fault Locating Method, the not short-circuit circle coil of the reactor and short dot axis It is that short-circuit circle coil is focused to a short dot to mapping, reactor winding is divided into the not short-circuit circle coil 1 of reactor, after short circuit Short dot 2 is axially, to be mapped one by one, can obtain mapping mutual inductance according to the mapping relations in this algorithm after mapping with iron core.

The iron-core reactor turn insulation Fault Locating Method, after the mapping foundation of two-dimensional plane coordinate system be Using reactor center point as origin, coil 1 and short-circuit circle coil short point 2 and its mapping are indicated with relative coordinate, and combines Field strength value at the reactor winding voltage's distribiuting and monitoring point carries out the positioning parsing of turn insulation short circuit trouble point, from And carry out precise positioning.

The iron-core reactor turn insulation Fault Locating Method, the detailed process of the step (3) are as follows: synchronous to obtain The monitoring data of upper and lower ends Hall magnetic field intensity sensor judge whether to occur obviously to be mutated；If it is not, proving that turn insulation is short Road failure does not occur, and continues to obtain upper and lower ends Hall magnetic field intensity monitoring data；If so, turn insulation short circuit event occurs Barrier.

A kind of iron-core reactor turn insulation On-line Fault monitoring system, composition include: Hall magnetic field intensity sensor prison It surveys unit, high-speed AD signal acquisition unit, signal sampling window filtering unit, signal proportion and restores conditioning unit, CPU main control unit And data wireless transmission unit, the Hall magnetic field intensity sensor monitoring unit, the high-speed AD signal acquisition unit, Signal sampling window filtering unit, the signal proportion reduction conditioning unit and the CPU main control unit and data Wireless transmission unit is sequentially connected.

The iron-core reactor turn insulation On-line Fault monitors system, the signal sampling window filtering unit for pair The continuous multi-point sampling of signal simultaneously carries out filtering in window, and continuous high speed sampling is no less than 5 data points, judgement in a sample window Whether noise jamming accidentally adopted into will interfere point deletion in sample window, valid data point is carried out at mean value due to capacitive coupling Reason, to obtain analog quantity output valve after preliminary treatment.

The iron-core reactor turn insulation On-line Fault monitors system, and the signal proportion reduction conditioning unit is used for Analog quantity output valve after preliminary treatment is reduced to field strength value in proportion, if the analog quantity mean value after sampling is V_i, also Former proportionality coefficient is K₁, bias reference constant is α, and system constant error is δ, and magnetic field strength is B at monitoring point_i, then.After parsingTurn insulation short trouble is judged whether there is for the later period to occur and carry out turn insulation Short trouble point location.

The utility model has the advantages that

Monitoring point at the two up and down 1. present invention can substantially reduce the high dependency to hardware testing circuit, after only relying on acquisition Data and correlation map coordinate parameters can carry out precise positioning to reactor turn insulation failure to be measured.

The present invention can change real-time online according to field strength value at two reference points of iron-core reactor coil outer It monitors whether its turn insulation failure occurs, if turn insulation failure occurs, turn insulation defect is accurately positioned according to mapped location algorithm Position tests iron-core reactor O&M and is of great significance with equipment safety operation.

Detailed description of the invention:

Fig. 1 iron-core reactor turn insulation Fault Locating Method and on-line monitoring system flow chart；

There are the iron-core reactor diagrammatic cross-sections of turn insulation failure by Fig. 2；

Fig. 3 iron-core reactor turn insulation Fault Mapping positions schematic diagram；

Fig. 4 iron-core reactor equatorial projection coordinate transformation schematic diagram；

Fig. 5 turn insulation On-line Fault monitors system structure diagram；

Fig. 6 shorted-turn fault is located at reactor topThis system test run result when at H；

Fig. 7 shorted-turn fault is located at reactor topThis system test run result when at H.

Specific embodiment: