阅读说明：本技术 一种利用集合匹配法的多分支配电网故障定位方法 (A kind of multiple-limb electrical power distribution network fault location method using sets match method ) 是由 束洪春 饶鸿江 常勇 于 2019-09-06 设计创作，主要内容包括：本发明涉及一种利用集合匹配法的多分支配电网故障定位方法,属于电力系统继电保护技术领域。首先由分支节点个数确定集合元素的个数,对馈线单元终端(FTU)装置设置三种工作模式,考虑故障电流方向,把分支节点相连线路FTU工作模式值相加,构成集合l<Sub>z</Sub>,l<Sub>z</Sub>集合中的每个元素分别为不同分支节点相连线路FTU工作模式值之和；然后,依次模拟不同的区段和分支故障,建立相应的故障判定L<Sub>g</Sub>；最后,依据FTU上传信息到主站系统建立故障集合l<Sub>zf</Sub>,利用匹配法在故障判定L<Sub>g</Sub>中匹配到相应的集合l<Sub>x</Sub>,就可判断故障区段线路和分支线路。(The present invention relates to a kind of multiple-limb electrical power distribution network fault location methods using sets match method, belong to Relay Protection Technology in Power System field.The number for determining set element by branch node number first is arranged three kinds of operating modes to feeder unit terminal (FTU) device, considers fault current direction, branch node phase connecting lines FTU operating mode value is added, constitutes set l z , l z Each element in set is respectively the sum of different branch node phase connecting lines FTU operating mode values；Then, different section and branch's failure are successively simulated, corresponding fault verification L is established g ；Finally, establishing failure collection l according to FTU upload information to main station system zf , using matching method in fault verification L g In be matched to corresponding set l x , so that it may judge fault section route and branched line.)

1. a kind of multiple-limb electrical power distribution network fault location method using sets match method, it is characterised in that: first by branch node Number determines the number of set element, and three kinds of operating modes are arranged to FTU device, fault current direction are considered, branch node Phase connecting lines FTU operating mode value is added, and constitutes set l_z, l_zEach element in set is respectively that different branch nodes are connected The sum of route FTU operating mode value；Then, different section and branch's failure are successively simulated, corresponding fault verification L is established_g； Finally, establishing failure collection l according to the information that feeder unit terminal uploads to main station system_zf, using matching method in fault verification L_gIn be matched to corresponding set l_x, judge fault section route and branched line.

2. the multiple-limb electrical power distribution network fault location method according to claim 1 using sets match method, it is characterised in that Specific steps are as follows:

Step1: determining the number of element in set, and the number for counting lines branch node along lines branch determines element in set Number；

Step2: considering fault current direction, and FTU operating mode, the more electrical power distribution nets of multiple-limb are arranged；Fault current direction is Positive direction, then in mode 1, corresponding mode value is 1 for FTU work；Fault current direction is opposite direction, then FTU work is in mode- 1, corresponding mode value is -1；Route is normal, then for feeder unit terminal works in mode 0, corresponding mode value is 0；Multiple-limb Single supply power distribution network tail end line FTU operating mode is set as 2, -1,0, and fault current direction is positive direction, then FTU work is in mould Formula 2, corresponding mode value are 2；Fault current direction is opposite direction, then in mode -1, corresponding mode value is -1 for FTU work； Normally then in mode 0, corresponding mode value is 0 to route for FTU work；Multiple-limb single supply power distribution network non-end route FTU work The more electrical power distribution nets of mode and multiple-limb are identical；

Step3: being added branch node phase connecting lines FTU operating mode value, constitutes set l_z, l_zEach element value in set The sum of respectively different branch node phase connecting lines FTU operating mode values, can be obtained using formula (1), (2):

l_z={ N₁,N₂,N₃,...,N_n} (1)

In formula, N₁、N₂、...、N_nRespectively node 1,2 ..., the sum of N phase connecting lines FTU device operating mode value；n₁、 n₂、...、n_3n+2All FTU associative mode values respectively on route；l_zWhen=0, line work is normal；

Step4: fault verification L is established_g, different section and branch's failure are simulated, including multiple failure is obtained according to Step3 Fault verification L containing m set element_g:

L_g={ l₁,l₂,l₃,...,l_x,l_m} (3)

Step5: judging fault section route and branched line, and ca bin FTU upload information is to main website after breaking down System obtains failure collection l according to Step3_zf, according to (3) formula, judged using matching method:

If l_zf=l_x,It can then obtain fault section route and branched line.

Technical field

The present invention relates to a kind of multiple-limb electrical power distribution network fault location method using sets match method, belong to electric system after Electric protection technical field.

Background technique

Distribution network failure is quick, is accurately positioned and faulty line is isolated, and fast recovery of power supply plays an important role, Ke Yiti High power distribution network reliability of operation.Multiple-limb distribution net work structure is complicated, and fault location is more difficult, and especially rural area multiple-limb is matched Natural conditions locating for power grid are complicated and changeable, and the probability that breaks down is big, and trouble shoot is difficult, generally require artificial telemetry link insulation Value, a section searches failure, and the debugging time increases, reduces sustainable power-on time, bring economic loss.Utilize traveling wave method Although specific abort situation can be calculated by carrying out fault location, there is faster response speed and higher range accuracy, it is right In multiple-limb power distribution network, required installing traveling-wave device number is more, and cost of investment is big, if utilizing the single-ended method of traveling wave or the event of both-end method Barrier positioning, failure Mintrop wave head and fault point transmitted wave complexity are difficult in multiple-limb power distribution network.Techniques of feeder terminal unit in power distribution network list First FTU is gradually popularized, and is proposed the distribution network failure positioning based on matrix algorithm, is utilized FTU upload information binding member equipment structure Fault message matrix is built, according to criterion positioning failure section, but matrix algorithm dimension is high, and criterion is complicated.Furthermore a variety of artificial intelligence The introducing of energy algorithm improves the efficiency of fault location in various degree, and operand is larger, programming complexity, not simple and quick enough.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of multiple-limb distribution network failure positioning using sets match method Method, with to solve the above technical problems.

The technical scheme is that a kind of multiple-limb electrical power distribution network fault location method using sets match method, first The number that set element is determined by branch node number is arranged three kinds of operating modes to feeder unit terminal (FTU), considers failure Current direction is added branch node phase connecting lines FTU operating mode value, constitutes set l_z, l_zEach element difference in set For the sum of different branch node phase connecting lines FTU operating mode values；Then, different section and branch's failure are successively simulated, is built Found corresponding fault verification L_g；Finally, establishing failure collection l according to the information that feeder unit terminal uploads to main station system_zf, benefit With matching method in fault verification L_gIn be matched to corresponding set l_x, so that it may judge fault section route and branched line.

Specific steps are as follows:

Step1: determining the number of element in set, and the number for counting lines branch node along lines branch determines in set Element number；

Step2: considering fault current direction, and FTU operating mode, the more electrical power distribution nets of multiple-limb are arranged；Fault current side To for positive direction, then in mode 1, corresponding mode value is 1 for FTU work；Fault current direction is opposite direction, then FTU work exists Mode -1, corresponding mode value are -1；Route is normal, then for feeder unit terminal works in mode 0, corresponding mode value is 0；It is more Branch's single supply power distribution network tail end line FTU operating mode is set as 2, -1,0, and fault current direction is positive direction, then FTU works In mode 2, corresponding mode value is 2；Fault current direction is opposite direction, then FTU work is in mode -1, corresponding mode value It is -1；Normally then in mode 0, corresponding mode value is 0 to route for FTU work；Multiple-limb single supply power distribution network non-end route FTU The more electrical power distribution nets of operating mode and multiple-limb are identical；

Step3: being added branch node phase connecting lines FTU operating mode value, constitutes set l_z, l_zEach member in set Element value is respectively the sum of different branch node phase connecting lines FTU operating mode values, can be obtained using formula (1), (2):

l_z={ N₁,N₂,N₃,...,N_n} (1)

In formula, N₁、N₂、...、N_nRespectively node 1,2 ..., the sum of N phase connecting lines FTU device operating mode value；n₁、 n₂、...、n_3n+2All FTU associative mode values respectively on route；l_zWhen=0, line work is normal；

Step4: fault verification L is established_g, different section and branch's failure, including multiple failure are simulated, according to Step3, Obtain the fault verification L containing m set element_g:

L_g={ l₁,l₂,l₃,...,l_x,l_m} (3)

Step5: judging fault section route and branched line, after breaking down ca bin FTU upload information to Main station system obtains failure collection l according to Step3_zf, according to (3) formula, judged using matching method:

If l_zf=l_x,It can then obtain fault section route and branched line.

The beneficial effects of the present invention are:

(1) the information architecture failure collection l of main station system is uploaded to using ca bin FTU_zfIn conjunction with matching method In fault verification L_gIn be matched to corresponding set l_x, the method is few using element, and programming is simple, and committed memory is small, and it is easy to accomplish, Improve the efficiency of fault location.

(2) failure collection l is utilized_zfMatch fault verification L_gObtain corresponding set l_x, that is, can recognize fault section route and The method of branched line can accurately identify failure to multiple-limb single supply power distribution network or the more electrical power distribution net failures of multiple-limb Section route and branched line reduce artificial line walking time, fast recovery of power supply, thus improve power distribution network power supply reliability and Reduce economic loss.

Detailed description of the invention

Fig. 1 is multiple-limb dual power supply power distribution network figure of the present invention；

Fig. 2 is multiple-limb double voltage control fault verification L of the present invention_g1Set figure；

Fig. 3 is multiple-limb single supply power distribution network figure of the present invention；

Fig. 4 is multiple-limb radial supply line fault verification L of the present invention_g2Set figure.

Specific embodiment

With reference to the accompanying drawings and detailed description, the invention will be further described.