CN100342461C - Slice matching method for large capacity metal oxide pressure-limiting device - Google Patents

Abstract

The present invention discloses a slice matching method for a metal oxide pressure-limiting device. The parallel column number of pressure-limiting device valve slices is set as m, and each column is connected with a plurality of valve slices in series. When the slices are matched primarily, a merging method is adopted, a plurality of groups of regions are set, each group of regions have m subregions, and selected m*n valve slices are sequenced according to voltage to be put in the corresponding subregions. Two groups of regions with maximum pressure difference are selected at each time to be sorted according to a certain rule, and hollow regions are removed till a unique group of regions are left. If the pressure difference between the subregions still excess an allowed range, further fine match is carried out. In the fine match time, an exchanging method is adopted, and a group of valve slices are selected from two subregions with the maximum pressure difference according to a certain rule at each time to carry out exchange, which causes the pressure difference to be reduced till the maximum differential pressure is in a specified value or the maximum differential pressure is unable to be reduced continuously. In a group of regions, each subregion is relative to a valve slice column.

Description

Slice matching method for large capacity metal oxide pressure-limiting device

Technical field

The present invention relates to a kind of slice matching method for large capacity metal oxide pressure-limiting device.

Background technology

Large capacity metal oxide pressure-limiting device (lightning arrester, MOV, MOA) is a kind of vitals that is used for large value capacitor group (as series compensation capacitor group, direct current system neutral bus capacitor group, big capacity filter capacitor group etc.) overvoltage protection.Because the capacity of this voltage limiter is very big, therefore need form a plurality of valve block posts by number of metal oxide resistor sheet (valve block) series connection back, and then the use that is together in parallel, to consume the huge energy that overvoltage is brought.

At home, although multicolumn (mostly being 3 posts most) lightning arrester product in parallel is also arranged, but this lightning arrester just that those DC reference voltage are relatively consistent valve block when joining sheet carries out series and parallel and joins sheet, wishes that with this each valve block column current shunting is evenly consumed energy quite when lightning arrester moves.But because the good nonlinear characteristic of metal oxide valve block and lack slice matching method necessary, rule, the uniformity of each post shunting when action is actually and is difficult to guarantee in its lightning arrester.

Some external lightning arrester manufactories are when solving the equal flow problem of this multicolumn lightning arrester connected in parallel, mainly be to rely on the large-scale experiment equipment that they had, two column valve sheets are together in parallel and apply surge voltage, and according to the two post shunting situation adjustment valve block of a post wherein, within the specific limits with the difference control of two posts shunting.Therefore this method must have large-scale experiment equipment, and this is a necessary condition.This method is not an optimum method optimum or approaching, and the difference that just will shunt is controlled at the lazy way that gets final product in a certain given range.

For these big capacity voltage limiters, the bad bigger valve block post of those shuntings that will cause of current-sharing is crossed cause thermal damage, even whole voltage limiter unit exploded, cause power system accident, thereby must find a kind of method, this voltage limiter flows through each valve block post when action electric current is shunted evenly.

Summary of the invention

The purpose of this invention is to provide a kind of slice matching method for large capacity metal oxide pressure-limiting device, use this method, can make electric current shunting that voltage limiter the time flows through each valve block post in action evenly, prevent that effectively indivedual valve block posts from crossing cause thermal damage, to guarantee the safety of voltage limiter.

For achieving the above object, the present invention takes following design: the slice matching method of this large capacity metal oxide pressure-limiting device is as follows:

Suppose that voltage limiter has m valve block post in parallel, each post middle valve plate series connection number is n, then:

1) delimit n group zone, set every group of zone and contain the m sub regions, each subregion can hold n valve block at least;

2) DC reference voltage or the size of the residual voltage under the operating current of m * n selected valve block being pressed valve block sorts, and order is put into each subregion with m * n valve block successively one by one according to this respectively;

3) calculate the maximum differential pressure that each organizes regional middle valve plate voltage, this maximum differential pressure is organized the pressure reduction of voltage total value between the minimum subregion of the highest subregion of regional middle valve plate voltage total value and valve block voltage total value for each, and with the pressure reduction of this pressure reduction as this group valve block;

4) in existing valve block group zone, select two valve block group zones of pressure reduction maximum;

5) will be wherein valve block in one group of zone be integrated in another group zone according to following rule and go; All valve blocks in the m work song zone in this zone are integrated in another the 1st work song zone, group zone go, all valve blocks in this regional m-1 work song zone are integrated into another to be organized in the 2nd work song zone and goes, all valve blocks in this regional m-2 work song zone are integrated in another the 3rd work song zone, group zone go, the rest may be inferred;

One group of zone that 6) will be available is removed, and judges whether remaining areas group number is 1, if equal 1, then turns to the 8th) bar;

7) remaining areas group number is greater than 1, then:

A) summation of that each the subregion middle valve plate voltage of group zone after the calculating merger;

B) press voltage summation size, to each subregion rearrangement in that group zone after the merger, make the 1st work song zone middle valve plate voltage summation the highest, m work song zone middle valve plate voltage summation is minimum;

C) calculate the pressure reduction of voltage total value between the minimum subregion of the highest subregion of this group zone middle valve plate voltage total value after the merger and valve block voltage total value, this pressure reduction is the regional maximum differential pressure of this group;

D) repeating step 4);

8) slightly joining the merging optimization process finishes;

9) calculate the voltage summation of each subregion middle valve plate in this group zone, it is the valve block column voltage, calculate the pressure reduction that this organizes voltage total value between the minimum subregion of the highest subregion of regional middle valve plate voltage total value and valve block voltage total value, this pressure reduction is the maximum differential pressure in this group zone;

10) if this maximum differential pressure satisfies predefined numerical value requirement, then to join the sheet process and finish, the valve block in each subregion in this group zone is corresponding to needed valve block of valve block post of voltage limiter; Otherwise carry out:

11) the indivedual valve blocks in two valve block posts of pressure reduction maximum are exchanged adjustment, adjust the back and repeat the 9th) bar; Then to valve block exchange adjust as follows:

A) from two valve block posts of pressure reduction maximum, respectively select such one group of valve block, 1/2 of 1≤valve block quantity≤regional middle valve plate sum, the pressure reduction of these two groups of valve blocks is near 1/2 of these two valve block post pressure reduction, and less than the pressure reduction of these two valve block posts, and the high valve block group voltage of valve block column voltage should be higher than the low valve block group voltage of valve block column voltage;

B) exchange this two groups of valve blocks, soon the valve block group of selecting from valve block column voltage Gao Zhezhong is put into the low person of valve block column voltage and goes, and the valve block group that will select from the low person of valve block column voltage is put into valve block column voltage Gao Zhezhong.

Advantage of the present invention is: this slice matching method can utilize existing or practical and simple testing equipment, make full use of all valve blocks as far as possible and make the voltage limiter of multicolumn parallel connection (MOV), and it is the most even or approaching the most even that each the post operating current of MOV that configures is distributed.

Description of drawings

Fig. 1 is the inventive method schematic diagram

Embodiment

The present invention's " slice matching method for large capacity metal oxide pressure-limiting device " is a kind of optimization slice matching method of system, its concrete grammar is following (supposes that it is m * n that a large capacity metal oxide pressure-limiting device needs the valve block number altogether, wherein m is a valve block post number, and n is the valve block number of connecting in every valve block post):

At first adopt " conflation algorithm " slightly to join, make m * n valve block form m valve block post:

1) delimit n group zone, set every group of zone and contain the m sub regions, each subregion can hold n valve block at least;

Distribution situation is set as shown in Figure 1 in the zone, suppose the individual subregion of depositing the strip of valve block of m * n placed side by side, can hold n valve block at least in each subregion.These zones have been divided into the n group, in each group the m sub regions are arranged.

All can there be certain difference in DC reference voltage or the residual voltage under the operating current for each valve block, therefore, want to make each valve block post electric current distributed uniform when pressure limiting in parallel, at first must survey the DC reference voltage of each valve block or the residual voltage under the operating current.This point is easy to accomplish, does not need large-scale experiment equipment.If join sheet,,, just survey its residual voltage if join sheet with the residual voltage under the operating current with regard to the DC reference voltage of side valve sheet with DC reference voltage.These measured datas are bases that voltage limiter is joined sheet, and can be realized by prior art.

2) with m * n selected valve block by big or small ordering of voltage (the voltage here refer to the DC reference voltage of valve block or the residual voltage under the operating current), set the valve block voltage the highest (or minimum) of first subregion placement in first group of zone, n organizes the valve block voltage minimum (or the highest) of the m sub regions placement in zone, and successively m * n valve block is put into each subregion one by one respectively according to this order.

3) calculate the maximum differential pressure that each organizes regional middle valve plate voltage, and with this pressure reduction as the pressure reduction of this group valve block (the valve block voltage that this pressure reduction equals the 1st work song zone in this group zone deducts the valve block voltage in m work song zone).

4) in existing valve block group zone (when beginning most, existing valve block group number of regions be n) selects two valve block group zones (if having only two valve block group zones, then two of the pressure reduction maximum valve block group zones are exactly these two valve block group zones) of pressure reduction maximum.

5) will be wherein valve block in one group of zone be integrated in another group zone according to following rule and go: all valve blocks in the m work song zone in this zone are integrated in another the 1st work song zone, group zone go, all valve blocks in the m-1 work song zone in this zone are integrated into another to be organized in the 2nd work song zone and goes, all valve blocks in this regional m-2 work song zone are integrated in another the 3rd work song zone, group zone go, the rest may be inferred;

One group of zone that 6) will be available is removed, and judge whether remaining areas group number is 1: be 1, then " merger " optimizing process (promptly slightly joining) finishes, and turns to for the 8th step, adjusts valve block with " exchanging method " and carefully joins;

7) remaining areas group number is then proceeded merger and is handled greater than 1:

A) summation of that each the subregion middle valve plate voltage of group zone after the calculating merger;

B) press voltage summation size, to each subregion rearrangement of that group zone after the merger (and only being this group), the 1st work song zone middle valve plate voltage summation the highest (minimum), m work song zone middle valve plate voltage summation minimum (the highest);

C) calculate the maximum differential pressure of this group zone (and only being this group) the middle valve plate voltage summation after the merger, and with the pressure reduction of this pressure reduction as this group valve block.The valve block voltage summation that this pressure reduction equals the 1st work song zone in this group zone deducts the valve block voltage summation in m work song zone.

D) repeating step 4);

Because the 5th) the one group of zone that is available has been got rid of when going on foot, therefore above processing procedure is whenever carried out a circulation, will get rid of one group of zone, to the last remaining unique one group of zone.

8) " conflation algorithm " slightly joins the process end, uses " exchanging method " to exchange adjustment individually as required again with handling the remaining unique one group of zone valve block in back;

The ordering that it should be noted that valve block voltage both can be arranged from big to small, also can arrange from small to large, as long as guarantee the 7th) step b) ordering and the 1st) ordering that goes on foot is consistent, resulting final process result is exactly identical.In addition, because the electric current and the voltage of valve block exist corresponding relation, it also is fully passable tentatively joining sheet with valve block operating current under the identical residual voltage or same reference voltage reference current once by above-mentioned slice matching method.

9) calculate the voltage summation of each subregion middle valve plate in this group zone, i.e. valve block column voltage calculates the maximum differential pressure of all subregion valve block voltage summation in this group zone;

10) if this maximum differential pressure satisfies predefined numerical value requirement, then to join the sheet process and finish, the valve block in each subregion in this group zone is corresponding to needed valve block of valve block post of voltage limiter.Otherwise carry out:

11) valve block in two valve block posts of pressure reduction maximum is exchanged adjustment, adjusts the back and repeat the 9th) bar.It is as follows that valve block is exchanged regulation rule:

A) from two valve block posts of pressure reduction maximum, respectively select such one group of valve block (1≤quantity≤subregion middle valve plate sum 1/2), the pressure reduction of these two valve block groups is near 1/2 of these two valve block post pressure reduction, and less than the pressure reduction of these two valve block posts, and the high valve block group voltage of valve block column voltage should be higher than the low valve block group voltage of valve block column voltage;

B) exchange this two valve block groups, soon the valve block group of selecting from valve block column voltage Gao Zhezhong is put into the low person of valve block column voltage and goes, and the valve block group that will select from the low person of valve block column voltage is put into valve block column voltage Gao Zhezhong.

Join the sheet processing procedure at above voltage limiter, worked out a calculation procedure with Visual Basic, the entire process process can be finished in moment.

This slice matching method can be applicable to big capacity voltage limiter and similarly lightning arrester manufacturing.

Be illustrated with specific embodiment below:

The development of embodiment 1:MOV model machine

The MOV model machine has 3 unit, and 4 valve block posts are arranged in each unit, and each valve block post is composed in series (n=6) by 6 zinc oxide valve plates, composes in parallel (m=12) so this MOV model machine has 12 valve block posts, and 72 of total valve blocks of model machine (m * n=72).Cooperating the residual voltage under the electric current with 500A below is that valve block voltage illustrates its whole sheet process of joining.

In order to obtain the residual voltage of these valve blocks, the spy tests it, and result of the test is as shown in the table:

The residual voltage of 72 valve blocks under the 500A impulse current that table 1 MOV model machine uses

The valve block numbering	Residual voltage (kV)	The valve block numbering	Residual voltage (kV)	The valve block numbering	Residual voltage (kV)	The valve block numbering	Residual voltage (kV)	The valve block numbering	Residual voltage (kV)
										0305	6.29574	0752	6.05391	0177	6.32126	0388	6.51191	0390	6.48358
0880	6.13787	0879	6.03800	0759	6.50163	0877	6.48661	0384	6.51866
										0294	6.38639	1040	6.44397	0758	6.54313	0076	6.42275	1044	6.53428
0070	6.47386	0067	6.43974	0883	6.33735	0072	6.38945	0381	6.50415
										0385	6.41187	0383	6.45128	0882	6.44671	0075	6.45744	0391	6.50785
0757	6.05515	0875	6.45120	0172	6.36584	0077	6.47651	0677	6.49044
										0507	6.12556	0753	5.97153	0878	6.36115	1096	6.48814	0755	6.48042
0179	6.49935	0873	6.25589	0182	6.36372	0073	6.47028	0761	6.36674
										0760	6.47663	0763	6.05837	0178	6.38171	1050	6.51573	0176	6.48058
0872	6.45505	0506	5.93469	0069	6.43777	0066	6.48262	0881	6.46630
										0874	6.40212	0181	6.37813	0068	6.44684	0183	6.54573	0175	6.47365
0762	6.40527	0074	6.41941	0380	6.45096	0756	6.40798	0173	6.50260
										0386	6.41279	0302	6.34146	0382	6.48683	0389	6.49043
0071	6.22849	0298	6.34701	0295	6.45221	0180	6.36391
										0754	6.27004	0674	6.31405	1089	6.44512	0174	6.44861

After valve block in the table 1 sorted from high to low according to residual voltage, put into table 2 successively.Can place 6 valve blocks at least in each regional number in the table 2 and the lattice of subregion correspondence.Being the valve block numbering before "/" symbol in the lattice, is the voltage (being residual voltage here) after all valve block series connection in these lattice afterwards.

Table 2

	Zone 1	Zone 2	Zone 3	Zone 4	Zone 5	Zone 6
							Subregion 1	0183/6.54573	0389/6.49043	0073/6.47028	1040/6.44397	0178/6.38171	0305/6.29574
Subregion 2	0758/6.54313	1096/6.48814	0881/6.46630	0067/6.43974	0181/6.37813	0754/6.27004
							Subregion 3	1044/6.53428	0382/6.48683	0075/6.45744	0069/6.43777	0761/6.36674	0873/6.25589
Subregion 4	0384/6.51866	0877/6.48661	0872/6.45505	0076/6.42276	0172/6.36584	0071/6.22849
							Subregion 5	1050/6.51574	0390/6.48358	0295/6.45221	0074/6.41941	0180/6.36391	0880/6.13787
Subregion 6	0388/6.51191	0066/6.48262	0383/6.45128	0386/6.41279	0182/6.36372	0507/6.12556
							Subregion 7	0391/6.50785	0176/6.48050	0875/6.45120	0385/6.41187	0878/6.36115	0763/6.05837
Subregion 8	0381/6.50415	0755/6.48042	0380/6.45096	0756/6.40798	0298/6.34701	0757/6.05515
							Subregion 9	0173/6.50260	0760/6.47663	0174/6.44861	0762/6.40527	0302/6.34146	0752/6.05391
Subregion 10	0759/6.50163	0077/6.47651	0068/6.44684	0874/6.40212	0883/6.33735	0879/6.03800
							Subregion 11	0179/6.49935	0070/6.47386	0882/6.44671	0072/6.38945	0177/6.32127	0753/5.97153
Subregion 12	0677/6.49044	0175/6.47365	1089/6.44512	0294/6.38639	0674/6.31405	0506/5.93469
							Maximum differential pressure	55.29V	16.78V	25.16V	57.58V	67.66V	361.05V

Two zones with maximum differential pressure are zone 5 and zone 6.According to the rule of step 5), the valve block of zone in 6 merged in the zone 5 go, and remove zone 6 according to step 6, a) calculate all subregion valve block voltage summation in the zone 5 according to step 7), as shown in table 3:

Table 3

	Zone 1	Zone 2	Zone 3	Zone 4	Zone 5
						Subregion 1	0183/6.54573	0389/6.49043	0073/6.47028	1040/6.44397	0178，0506/12.31640
Subregion 2	0758/6.54313	1096/6.48814	0881/6.46630	0067/6.43974	0181，0753/12.34966
						Subregion 3	1044/6.53428	0382/6.48683	0075/6.45744	0069/6.43777	0761，0879/12.40474
Subregion 4	0384/6.51866	0877/6.48661	0872/6.45505	0076/6.42276	0172，0752/12.41975
						Subregion 5	1050/6.51574	0390/6.48358	0295/6.45221	0074/6.41941	0180，0757/12.41906
Subregion 6	0388/6.51191	0066/6.48262	0383/6.45128	0386/6.41279	0182，0763/12.42209
						Subregion 7	0391/6.50785	0176/6.48050	0875/6.45120	0385/6.41187	0878，0507/12.48671
Subregion 8	0381/6.50415	0755/6.48042	0380/6.45096	0756/6.40798	0298，0880/12.48488
						Subregion 9	0173/6.50260	0760/6.47663	0174/6.44861	0762/6.40527	0302，0071/12.56995
Subregion 10	0759/6.50163	0077/6.47651	0068/6.44684	0874/6.40212	0883，0873/12.59324
						Subregion 11	0179/6.49935	0070/6.47386	0882/6.44671	0072/6.38945	0177，0754/12.59131
Subregion 12	0677/6.49044	0175/6.47365	1089/6.44512	0294/6.38639	0674，0305/12.60979
						Maximum differential pressure	55.29V	16.78V	25.16V	57.58V

Resequenced and calculate maximum differential pressure in zone 5, promptly execution in step 7) b) and 7) c), obtain table 4.

Table 4

	Zone 1	Zone 2	Zone 3	Zone 4	Zone 5
						Subregion 1	0183/6.54573	0389/6.49043	0073/6.47028	1040/6.44397	0674，0305/12.60979
Subregion 2	0758/6.54313	1096/6.48814	0881/6.46630	0067/6.43974	0883，0873/12.59324
						Subregion 3	1044/6.53428	0382/6.48683	0075/6.45744	0069/6.43777	0177，0754/12.59131
Subregion 4	0384/6.51866	0877/6.48661	0872/6.45505	0076/6.42276	0302，0071/12.56995
						Subregion 5	1050/6.51574	0390/6.48358	0295/6.45221	0074/6.41941	0878，0507/12.48671
Subregion 6	0388/6.51191	0066/6.48262	0383/6.45128	0386/6.41279	0298，0880/12.48488
						Subregion 7	0391/6.50785	0176/6.48050	0875/6.45120	0385/6.41187	0182，0763/12.42209
Subregion 8	0381/6.50415	0755/6.48042	0380/6.45096	0756/6.40798	0172，0752/12.41975
						Subregion 9	0173/6.50260	0760/6.47663	0174/6.44861	0762/6.40527	0180，0757/12.41906
Subregion 10	0759/6.50163	0077/6.47651	0068/6.44684	0874/6.40212	0761，0879/12.40474
						Subregion 11	0179/6.49935	0070/6.47386	0882/6.44671	0072/6.38945	0181，0753/12.34966
Subregion 12	0677/6.49044	0175/6.47365	1089/6.44512	0294/6.38639	0178，0506/12.31640
						Maximum differential pressure	55.29V	16.78V	25.16V	57.58V	293.39V

Handle owing to also have 5 zones will carry out merger in the table 4, therefore carry out 7) d) after, carry out step 4) again.As shown in Table 4, two zones with maximum differential pressure are zone 4 and zone 5.According to the rule of step 5), the valve block of zone in 5 merged in the zone 4 go, and remove zone 5 according to step 6, a) calculate all subregion valve block voltage summation in the zone 4 according to step 7), as shown in table 5:

Table 5

	Zone 1	Zone 2	Zone 3	Zone 4
					Subregion 1	0183/6.54573	0389/6.49043	0073/6.47028	1040，0178，0506/18.76037
Subregion 2	0758/6.54313	1096/6.48814	0881/6.46630	0067，0181，0753/18.78940
					Subregion 3	1044/6.53428	0382/6.48683	0075/6.45744	0069，0761，0879/18.84251
Subregion 4	0384/6.51866	0877/6.48661	0872/6.45505	0076，0180，0757/18.84182
					Subregion 5	1050/6.51574	0390/6.48358	0295/6.45221	0074，0172，0752/18.83916
Subregion 6	0388/6.51191	0066/6.48262	0383/6.45128	0386，0182，0763/18.83488
					Subregion 7	0391/6.50785	0176/6.48050	0875/6.45120	0385，0298，0880/18.89675
Subregion 8	0381/6.50415	0755/6.48042	0380/6.45096	0756，0878，0507/18.89469
					Subregion 9	0173/6.50260	0760/6.47663	0174/6.44861	0762，0302，0071/18.97522
Subregion 10	0759/6.50163	0077/6.47651	0068/6.44684	0874，0177，0754/18.99343
					Subregion 11	0179/6.49935	0070/6.47386	0882/6.44671	0072，0883，0873/18.98269
Subregion 12	0677/6.49044	0175/6.47365	1089/6.44512	0294，0674，0305/18.99618
					Maximum differential pressure	55.29V	16.78V	25.16V

Resequenced and calculate maximum differential pressure in zone 4, promptly execution in step 7) b) and 7) c), obtain table 6.

Table 6

	Zone 1	Zone 2	Zone 3	Zone 4
					Subregion 1	0183/6.54573	0389/6.49043	0073/6.47028	0294，0674，0305/18.99618
Subregion 2	0758/6.54313	1096/6.48814	0881/6.46630	0874，0177，0754/18.99343
					Subregion 3	1044/6.53428	0382/6.48683	0075/6.45744	0072，0883，0873/18.98269
Subregion 4	0384/6.51866	0877/6.48661	0872/6.45505	0762，0302，0071/18.97522
					Subregion 5	1050/6.51574	0390/6.48358	0295/6.45221	0385，0298，0880/18.89675
Subregion 6	0388/6.51191	0066/6.48262	0383/6.45128	0756，0878，0507/18.89469
					Subregion 7	0391/6.50785	0176/6.48050	0875/6.45120	0069，0761，0879/18.84251
Subregion 8	0381/6.50415	0755/6.48042	0380/6.45096	0076，0180，0757/18.84182
					Subregion 9	0173/6.50260	0760/6.47663	0174/6.44861	0074，0172，0752/18.83916
Subregion 10	0759/6.50163	0077/6.47651	0068/6.44684	0386，0182，0763/18.83488
					Subregion 11	0179/6.49935	0070/6.47386	0882/6.44671	0067，0181，0753/18.78940
Subregion 12	0677/6.49044	0175/6.47365	1089/6.44512	1040，0178，0506/18.76037
					Maximum differential pressure	55.29V	16.78V	25.16V	235.81V

Handle owing to also have 4 zones will carry out merger in the table 6, therefore carry out 7 once more) d) after, carry out step 4) again.As shown in Table 6, two zones with maximum differential pressure are zone 1 and zone 4.According to the rule of step 5), the valve block of zone in 4 merged in the zone 1 go, and remove zone 4 according to step 6, a) calculate all subregion valve block voltage summation in the zone 1 according to step 7), as shown in table 7:

Table 7

	Zone 1	Zone 2	Zone 3
				Subregion 1	0183，1040，0178，0506/25.30610	0389/6.49043	0073/6.47028
Subregion 2	0758，0067，0181，0753/25.33253	1096/6.48814	0881/6.46630
				Subregion 3	1044，0386，0182，0763/25.36916	0382/6.48683	0075/6.45744
Subregion 4	0384，0074，0172，0752/25.35782	0877/6.48661	0872/6.45505
				Subregion 5	1050，0076，0180，0757/25.35756	0390/6.48358	0295/6.45221
Subregion 6	0388，0069，0761，0879/25.35442	0066/6.48262	0383/6.45128
				Subregion 7	0391，0756，0878，0507/25.40254	0176/6.48050	0875/6.45120
Subregion 8	0381，0385，0298，0880/25.40090	0755/6.48042	0380/6.45096
				Subregion 9	0173，0762，0302，0071/25.47782	0760/6.47663	0174/6.44861
Subregion 10	0759，0072，0883，0873/25.48432	0077/6.47651	0068/6.44684
				Subregion 11	0179，0874，0177，0754/25.49278	0070/6.47386	0882/6.44671
Subregion 12	0677，0294，0674，0305/25.48662	0175/6.47365	1089/6.44512
				Maximum differential pressure		16.78V	25.16V

Resequenced and calculate maximum differential pressure in zone 1, promptly execution in step 7) b) and 7) c), obtain table 8.

Table 8

	Zone 1	Zone 2	Zone 3
				Subregion 1	0179，0874，0177，0754/25.49278	0389/6.49043	0073/6.47028
Subregion 2	0677，0294，0674，0305/25.48662	1096/6.48814	0881/6.46630
				Subregion 3	0759，0072，0883，0873/25.48432	0382/6.48683	0075/6.45744
Subregion 4	0173，0762，0302，0071/25.47782	0877/6.48661	0872/6.45505
				Subregion 5	0391，0756，0878，0507/25.40254	0390/6.48358	0295/6.45221
Subregion 6	0381，0385，0298，0880/25.40090	0066/6.48262	0383/6.45128
				Subregion 7	1044，0386，0182，0763/25.36916	0176/6.48050	0875/6.45120
Subregion 8	0384，0074，0172，0752/25.35782	0755/6.48042	0380/6.45096
				Subregion 9	1050，0076，0180，0757/25.35756	0760/6.47663	0174/6.44861
Subregion 10	0388，0069，0761，0879/25.35442	0077/6.47651	0068/6.44684
				Subregion 11	0758，0067，0181，0753/25.33253	0070/6.47386	0882/6.44671
Subregion 12	0183，1040，0178，0506/25.30610	0175/6.47365	1089/6.44512
				Maximum differential pressure	186.68V	16.78V	25.16V

Handle owing to also have 3 zones will carry out merger in the table 8, therefore carry out 7 once more) d) after, carry out step 4) again again.As shown in Table 8, two zones with maximum differential pressure are zone 1 and zone 3.According to the rule of step 5), the valve block of zone in 3 merged in the zone 1 go, and remove zone 3 according to step 6, a) calculate all subregion valve block voltage summation in the zone 1 according to step 7), as shown in table 9:

Table 9

	Zone 1	Zone 2
			Subregion 1	0179，0874，0177，0754，1089/31.93790	0389/6.49043
Subregion 2	0677，0294，0674，0305，0882/31.93333	1096/6.48814
			Subregion 3	0759，0072，0883，0873，0068/31.93116	0382/6.48683
Subregion 4	0173，0762，0302，0071，0174/31.92643	0877/6.48661
			Subregion 5	0391，0756，0878，0507，0380/31.85350	0390/6.48358
Subregion 6	0381，0385，0298，0880，0875/31.85210	0066/6.48262
			Subregion 7	1044，0386，0182，0763，0383/31.82044	0176/6.48050
Subregion 8	0384，0074，0172，0752，0295/31.81003	0755/6.48042
			Subregion 9	1050，0076，0180，0757，0872/31.81261	0760/6.47663
Subregion 10	0388，0069，0761，0879，0075/31.81186	0077/6.47651
			Subregion 11	0758，0067，0181，0753，0881/31.79883	0070/6.47386
Subregion 12	0183，1040，0178，0506，0073/31.77638	0175/6.47365
			Maximum differential pressure		16.78V

Resequence and calculate maximum differential pressure in zone 1 in the his-and-hers watches 9, promptly execution in step 7) b) and 7) c), obtain table 10.

Table 10

	Zone 1	Zone 2
			Subregion 1	0179，0874，0177，0754，1089/31.93790	0389/6.49043
Subregion 2	0677，0294，0674，0305，0882/31.93333	1096/6.48814
			Subregion 3	0759，0072，0883，0873，0068/31.93116	0382/6.48683
Subregion 4	0173，0762，0302，0071，0174/31.92643	0877/6.48661
			Subregion 5	0391，0756，0878，0507，0380/31.85350	0390/6.48358
Subregion 6	0381，0385，0298，0880，0875/31.85210	0066/6.48262
			Subregion 7	1044，0386，0182，0763，0383/31.82044	0176/6.48050
Subregion 8	1050，0076，0180，0757，0872/31.81261	0755/6.48042
			Subregion 9	0388，0069，0761，0879，0075/31.81186	0760/6.47663
Subregion 10	0384，0074，0172，0752，0295/31.81003	0077/6.47651
			Subregion 11	0758，0067，0181，0753，0881/31.79883	0070/6.47386
Subregion 12	0183，1040，0178，0506，0073/31.77638	0175/6.47365
			Maximum differential pressure	161.52V	16.78V

Also have two last zones need carry out merger in the table 10 and handle, therefore carry out 7 once more) d) after, carry out step 4) again.According to the rule of step 5), the valve block of zone in 2 merged in the zone 1 go, and remove zone 2 according to step 6, a) calculate all subregion valve block voltage summation in the zone 1 according to step 7), as shown in table 11:

Table 11

	Zone 1
		Subregion 1	0179，0874，0177，0754，1089，0175/38.41155
Subregion 2	0677，0294，0674，0305，0882，0070/38.40719
		Subregion 3	0759，0072，0883，0873，0068，0077/38.40767
Subregion 4	0173，0762，0302，0071，0174，0760/38.40306
		Subregion 5	0391，0756，0878，0507，0380，0755/38.33392
Subregion 6	0381，0385，0298，0880，0875，0176/38.33260
		Subregion 7	1044，0386，0182，0763，0383，0066/38.30306
Subregion 8	1050，0076，0180，0757，0872，0390/38.29619
		Subregion 9	0388，0069，0761，0879，0075，0877/38.29847
Subregion 10	0384，0074，0172，0752，0295，0382/38.29686
		Subregion 11	0758，0067，0181，0753，0881，1096/38.28697
Subregion 12	0183，1040，0178，0506，0073，0389/38.26681
		Maximum differential pressure

Resequence and calculate maximum differential pressure in zone 1 in the his-and-hers watches 11, promptly execution in step 7) b) and 7) c), obtain table 12.

Table 12

	Zone 1
		Subregion 1	0179，0874，0177，0754，1089，0175/38.41155
Subregion 2	0759，0072，0883，0873，0068，0077/38.40767
		Subregion 3	0677，0294，0674，0305，0882，0070/38.40719
Subregion 4	0173，0762，0302，0071，0174，0760/38.40306
		Subregion 5	0391，0756，0878，0507，0380，0755/38.33392
Subregion 6	0381，0385，0298，0880，0875，0176/38.33260
		Subregion 7	1044，0386，0182，0763，0383，0066/38.30306
Subregion 8	0388，0069，0761，0879，0075，0877/38.29847
		Subregion 9	0384，0074，0172，0752，0295，0382/38.29686
Subregion 10	1050，0076，0180，0757，0872，0390/38.29619
		Subregion 11	0758，0067，0181，0753，0881，1096/38.28697
Subregion 12	0183，1040，0178，0506，0073，0389/38.26681
		Maximum differential pressure	144.74V

Owing to only be left a unique zone in the table 12, " conflation algorithm " slightly joined optimizing process and finished.Each subregion shown in the table 12 is represented a valve block post, and the average voltage of valve block post is 38.33703kV, and the maximum differential pressure between the valve block post is 144.74V, only is 0.37755% of valve block post average voltage.Because zinc oxide valve plate strong nonlinear characteristic, under such pressure reduction, when the valve block post was in parallel, the current unevenness evenness under its cooperation electric current will be up to about 30 * 0.37755%=11.33%.Therefore need between the valve block post, carry out the adjustment of exchanging of indivedual valve blocks to step 11) (promptly " exchanging method ") according to step 9), so that further reduce the maximum voltage difference between the valve block post.Suppose to make the maximum unevenness of intercolumniation electric current to reach in 5%, the intercolumniation maximum differential pressure must be at 5% ÷ 30=0.16%, and corresponding voltage difference is about 61V.

Need between subregion 1 and subregion 12, carry out the adjustment of exchanging of indivedual valve blocks as can be known by step 9) and step 10).According in the step 11) a) No. 1089 valve blocks in the subregion 1 and the voltage difference between No. 0178 valve block in the subregion 12 are 63.41V as can be known, near 144.74/2=72.37V, and satisfy other and exchange condition, the situation after these two valve blocks are changed over is as shown in table 13.

Table 13

	Zone 1
		Subregion 1	0179，0874，0177，0754，0178，0175/38.34814
Subregion 2	0759，0072，0883，0873，0068，0077/38.40767
		Subregion 3	0677，0294，0674，0305，0882，0070/38.40719
Subregion 4	0173，0762，0302，0071，0174，0760/38.40306
		Subregion 5	0391，0756，0878，0507，0380，0755/38.33392
Subregion 6	0381，0385，0298，0880，0875，0176/38.33260
		Subregion 7	1044，0386，0182，0763，0383，0066/38.30306
Subregion 8	0388，0069，0761，0879，0075，0877/38.29847
		Subregion 9	0384，0074，0172，0752，0295，0382/38.29686
Subregion 10	1050，0076，0180，0757，0872，0390/38.29619
		Subregion 11	0758，0067，0181，0753，0881，1096/38.28697
Subregion 12	0183，1040，1089，0506，0073，0389/38.33022
		Maximum differential pressure	120.70V

Two sub regions of pressure reduction maximum are subregion 2 and subregion 11 in the table 13, and its difference is 120.70V＞61V, therefore need exchange the valve block of this two sub regions, and the pressure reduction of the two is reduced.According in the step 11) a) as can be known No. 0759 valve block in the subregion 2 and the voltage difference between No. 0067 valve block in the subregion 11 be 61.89V, and satisfy other and exchange condition, the situation after these two valve blocks are changed over is as shown in table 14.

Table 14

	Zone 1
		Subregion 1	0179，0874，0177，0754，0178，0175/38.34814
Subregion 2	0067，0072，0883，0873，0068，0077/38.34578
		Subregion 3	0677，0294，0674，0305，0882，0070/38.40719
Subregion 4	0173，0762，0302，0071，0174，0760/38.40306
		Subregion 5	0391，0756，0878，0507，0380，0755/38.33392
Subregion 6	0381，0385，0298，0880，0875，0176/38.33260
		Subregion 7	1044，0386，0182，0763，0383，0066/38.30306
Subregion 8	0388，0069，0761，0879，0075，0877/38.29847
		Subregion 9	0384，0074，0172，0752，0295，0382/38.29686
Subregion 10	1050，0076，0180，0757，0872，0390/38.29619
		Subregion 11	0758，0759，0181，0753，0881，1096/38.34886
Subregion 12	0183，1040，1089，0506，0073，0389/38.33022
		Maximum differential pressure	111.00V

Two sub regions of pressure reduction maximum are subregion 3 and subregion 10 in the table 14, and its difference is 111.00V＞61V, therefore also need to exchange the valve block of this two sub regions, and the pressure reduction of the two is reduced.According in the step 11) a) as can be known No. 0070 valve block in the subregion 3 and the voltage difference between No. 0076 valve block in the subregion 10 be 51.11V, and satisfy other and exchange condition, the situation after these two valve blocks are changed over is as shown in Table 15.

Table 15

	Zone 1
		Subregion 1	0179，0874，0177，0754，0178，0175/38.34814
Subregion 2	0067，0072，0883，0873，0068，0077/38.34578
		Subregion 3	0677，0294，0674，0305，0882，0076/38.35608
Subregion 4	0173，0762，0302，0071，0174，0760/38.40306
		Subregion 5	0391，0756，0878，0507，0380，0755/38.33392
Subregion 6	0381，0385，0298，0880，0875，0176/38.33260
		Subregion 7	1044，0386，0182，0763，0383，0066/38.30306
Subregion 8	0388，0069，0761，0879，0075，0877/38.29847
		Subregion 9	0384，0074，0172，0752，0295，0382/38.29686
Subregion 10	1050，0070，0180，0757，0872，0390/38.34730
		Subregion 11	0758，0759，0181，0753，0881，1096/38.34886
Subregion 12	0183，1040，1089，0506，0073，0389/38.33022
		Maximum differential pressure	106.20V

Two sub regions of pressure reduction maximum are subregion 4 and subregion 9 in the table 15, and its difference is 106.20V＞61V, therefore also need to exchange the valve block of this two sub regions, and the pressure reduction of the two is reduced.According in the step 11) a) as can be known No. 0173 valve block in the subregion 4 and the voltage difference between No. 0295 valve block in the subregion 9 be 50.39V, and satisfy other and exchange condition, the situation after these two valve blocks are changed over is shown in table 16.

Table 16

	Zone 1
		Subregion 1	0179，0874，0177，0754，0178，0175/38.34814
Subregion 2	0067，0072，0883，0873，0068，0077/38.34578
		Subregion 3	0677，0294，0674，0305，0882，0076/38.35608
Subregion 4	0295，0762，0302，0071，0174，0760/38.35267
		Subregion 5	0391，0756，0878，0507，0380，0755/38.33392
Subregion 6	0381，0385，0298，0880，0875，0176/38.33260
		Subregion 7	1044，0386，0182，0763，0383，0066/38.30306
Subregion 8	0388，0069，0761，0879，0075，0877/38.29847
		Subregion 9	0384，0074，0172，0752，0173，0382/38.34725
Subregion 10	1050，0070，0180，0757，0872，0390/38.34730
		Subregion 11	0758，0759，0181，0753，0881，1096/38.34886
Subregion 12	0183，1040，1089，0506，0073，0389/38.33022
		Maximum differential pressure	57.61V

Two sub regions of pressure reduction maximum are subregion 3 and subregion 8 in the table 16, and its difference is 57.61V＜61V, has satisfied halt condition.In fact, computer program be with its adjust to can not further carry out monolithic when adjusting till, shown in table 17 corresponding in this case all subregion valve block numbering and voltage thereof:

Table 17

	Zone 1
		Subregion 1	0179，0175，0874，0178，0177，0754/38.3481kV
Subregion 2	1050，0390，0070，0872，0180，0757/38.3473kV
		Subregion 3	0384，0173，0382，0074，0172，0752/38.3473kV
Subregion 4	0077，0068，0067，0072，0883，0873/38.3458kV
		Subregion 5	0758，0759，1096，0075，0181，0753/38.3400kV
Subregion 6	0391，0755，0380，0756，0878，0507/38.3339kV
		Subregion 7	0381，0176，0875，0385，0298，0880/38.3326kV
Subregion 8	0881，0882，0076，0294，0674，0305/38.3320kV
		Subregion 9	0388，0677，0877，0069，0761，0879/38.3315kV
Subregion 10	0183，0389，0073，1089，1040，0506/38.3302kV
		Subregion 11	1044，0066，0760，0386，0182，0763/38.3284kV
Subregion 12	0295，0383，0174，0762，0302，0071/38.3273kV
		Maximum differential pressure	20.8V

Because the valve block limited amount (having only 72) that provides among the embodiment 1, residual voltage dispersiveness very big (difference of maximum and minimum residual voltage is up to 611.04V), and distributed pole is inhomogeneous (shown in the table 2 of embodiment 1, only 10 valve block maximum differential pressures in the zone 6 are just up to 361.05V, and the pressure reduction of other valve block is much smaller than these 10 valve blocks), the series connection number also has only 6, so this is a very harsh example.However, when adopting this slice matching method, behind the only preliminary merging optimization, valve block intercolumniation maximum differential pressure has just reached 144.74V, and carrying out after intercolumniation (single) valve block exchanges processing, the intercolumniation maximum differential pressure further has been reduced to 20.8V, be 38.33703kV and cooperate the valve block post residual voltage mean value under the electric current 500A, so maximum differential pressure only is 0.0543% of a valve block post residual voltage mean value.Under this pressure reduction, the maximum differential of electric current is 30 * 0.0543%=1.63%, and generally require the unevenness of valve block column current to get final product with interior, so there is no need further to reduce maximum differential pressure between the valve block post exchanging a plurality of valve blocks between the subregion at every turn 5%.

Claims (1)

1, a kind of slice matching method for large capacity metal oxide pressure-limiting device is characterized in that method is as follows:

Suppose that voltage limiter has m valve block post in parallel, each post middle valve plate series connection number is n, then:

1) delimit n group zone, set every group of zone and contain the m sub regions, each subregion can hold n valve block at least;

2) DC reference voltage or the size of the residual voltage under the operating current of mxn selected valve block being pressed valve block sorts, and order is put into each subregion with mxn valve block successively one by one according to this respectively;

3) calculate the maximum differential pressure that each organizes regional middle valve plate voltage, this maximum differential pressure is organized the pressure reduction of voltage total value between the minimum subregion of the highest subregion of regional middle valve plate voltage total value and valve block voltage total value for each, and with the pressure reduction of this pressure reduction as this group valve block;

4) in existing valve block group zone, select two valve block group zones of pressure reduction maximum;

5) will be wherein valve block in one group of zone be integrated in another group zone according to following rule and go; All valve blocks in the m work song zone in this zone are integrated in another the 1st work song zone, group zone go, all valve blocks in this regional m-1 work song zone are integrated into another to be organized in the 2nd work song zone and goes, all valve blocks in this regional m-2 work song zone are integrated in another the 3rd work song zone, group zone go, the rest may be inferred;

One group of zone that 6) will be available is removed, and judges whether remaining areas group number is 1, if equal 1, then turns to the 8th) bar;

7) remaining areas group number is greater than 1, then:

A) summation of that each the subregion middle valve plate voltage of group zone after the calculating merger;

B) press voltage summation size, to each subregion rearrangement in that group zone after the merger, make the 1st work song zone middle valve plate voltage summation the highest, m work song zone middle valve plate voltage summation is minimum;

C) calculate the pressure reduction of voltage total value between the minimum subregion of the highest subregion of this group zone middle valve plate voltage total value after the merger and valve block voltage total value, this pressure reduction is the regional maximum differential pressure of this group;

D) repeating step 4);

8) slightly joining the merging optimization process finishes;

9) calculate the voltage summation of each subregion middle valve plate in this group zone, it is the valve block column voltage, calculate the pressure reduction that this organizes voltage total value between the minimum subregion of the highest subregion of regional middle valve plate voltage total value and valve block voltage total value, this pressure reduction is the maximum differential pressure in this group zone;

10) if this maximum differential pressure satisfies predefined numerical value requirement, then to join the sheet process and finish, the valve block in each subregion in this group zone is corresponding to needed valve block of valve block post of voltage limiter; Otherwise carry out:

11) the indivedual valve blocks in two valve block posts of pressure reduction maximum are exchanged adjustment, adjust the back and repeat the 9th) bar; Then to valve block exchange adjust as follows:

A) from two valve block posts of pressure reduction maximum, respectively select such one group of valve block, 1/2 of 1≤valve block quantity≤regional middle valve plate sum, the pressure reduction of these two groups of valve blocks is near 1/2 of these two valve block post pressure reduction, and less than the pressure reduction of these two valve block posts, and the high valve block group voltage of valve block column voltage should be higher than the low valve block group voltage of valve block column voltage;

B) exchange this two groups of valve blocks, soon the valve block group of selecting from valve block column voltage Gao Zhezhong is put into the low person of valve block column voltage and goes, and the valve block group that will select from the low person of valve block column voltage is put into valve block column voltage Gao Zhezhong.

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