CN102231326A - 3/2-type differential current bridge power capacitor apparatus - Google Patents
3/2-type differential current bridge power capacitor apparatus Download PDFInfo
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- CN102231326A CN102231326A CN2011100886911A CN201110088691A CN102231326A CN 102231326 A CN102231326 A CN 102231326A CN 2011100886911 A CN2011100886911 A CN 2011100886911A CN 201110088691 A CN201110088691 A CN 201110088691A CN 102231326 A CN102231326 A CN 102231326A
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Abstract
The invention relates to a 3/2-type differential current bridge power capacitor apparatus. The apparatus comprises at least one capacitor bank which satisfies phase-splitting arrangement. The apparatus is characterized in that: 3/2 differential current bridge wiring is adopted in the capacitor bank; the 3/2 differential current bridge wiring is wiring according to a 3/2 bridge mode; the bridges comprise six capacitor bridge legs; current transformers are connected in intermediate potential of the bridges; when the capacitor bank is in a normal state, a balanced current value which flows through the current transformers tends to be zero. By using the 3/2-type differential current bridge power capacitor apparatus provided in the invention, an initial imbalance protection value can be effectively reduced; an imbalance protection setting value of the capacitor can be raised; explosion resistance ability can not be weakened and allowable overvoltage times can not be sacrificed; a monitoring scope of imbalance protection can be reduced; an incidence rate of symmetry faults can be reduced; capability of identifying faults generated in a capacitor unit of the capacitor bank can be improved; detection of parts of the bridge legs and the redundancy of the protection can be realized; processing time of the whole faults can be shortened; reliability and sensitivity of imbalance protection can be greatly raised.
Description
Technical field
The present invention relates to a kind of capacitor device of field of power, be specifically related to a kind of
Formula bridge difference electric capacitor apparatus.
Background technology
Along with electric capacitor apparatus applying in super, UHV transmission line, rated voltage, rated current and single pool-size of capacitor group required also the security reliability of large-scale capacitor device group to be had higher requirement when improving constantly.
Shortcomings such as outer fuse capacitor is simple owing to its arc extinguishing structure, installation requirement is high, operation stability is poor, the life-span is short are stopped using in 500kV transformer station large-scale capacitor device group.
No fuse capacitor in order to reduce intact element because of the probability that overvoltage damages, requires the inner member serial number more usually, and the single capacitor rated voltage is often higher.Under all constant condition of whole group and single capacitor capacity, the rated voltage of single capacitor is high more, and the series connection platform number of capacitor just more less in the capacitor group, every string section platform number in parallel is many more.Produced the potential safety hazard that every string section platform number in parallel surpasses anti-blasting energy tolerance limit thus, this high safety requirements with large-scale capacitor device group conflicts mutually.Simultaneously, the protected mode that no fuse capacitor is protected single capacitor and the capacitor device protection unites two into one has obviously reduced the reliability of protecting.In addition, no fuse capacitor application is in large-scale series capacitor bank, because the damage of an element easily causes intact element string section overvoltage serious, causes excising whole capacitor, and capacitance loss is bigger.
The needs that inner fuse capacitor cut-offs owing to interior fuse, single capacitor inner member number in parallel requires more, and the element connected in series hop count requires less, and the rated voltage of single capacitor is lower naturally.Putting in order under all constant condition of group and single capacitor capacity, the rated voltage of single capacitor is low more, and then the series connection platform number of capacitor is just many more in the capacitor group, and every string section platform number in parallel can greatly reduce.Inner fuse capacitor had both been broken away from the puzzlement of outer fuse, had avoided the big specific (special) requirements of no fuse capacitor inner member serial number again, was the optimal selection of large-scale capacitor device group.
At present, for large value capacitor group (35kV～110kV, 60Mvar and above capacitor group), all preferential protection configuration mode that adopts internal fuse protected+unbalance protection.Jumbo inner fuse capacitor group; capacitor platform number is a lot; the capacitor element number is more, and protective device will be told 1～2 element fault in tens thousand of elements, needs to select suitable capacitor set of connections mode to set up the unbalance protection of high sensitivity, high reliability.
The inner fuse capacitor group requires unbalance protection to react delicately when each capacitor element breaks down, and obviously is not suitable for selecting for use the unbalance voltage protection of high multiple no-load voltage ratio; The easy malfunction of double star unbalance protection is stopped using in large-scale capacitor device groups such as 500kV transformer station at present.For series capacitor bank; because of its directly by being in series in the middle of circuit, do not have star, delta connection mode problem, and string mends with the capacitor group because condition restriction measurement voltage signal not; therefore, the unbalance protection of series capacitor is generally the spill current protection.The protection of the spill current of large-scale capacitor device group is common has do enforced and unpaid work for the government or landlord stream protection and H type bridge-type difference of branchs to flow and protect two big classes, as shown in Figure 1.
Dividing the stream mode of connection (shown in Fig. 1 (a)) of doing enforced and unpaid work for the government or landlord is the structure of two branch road parallel connections for the every of capacitor group mutually, and unsymmetrical current is current transformer measured value poor of two parallel branchs.The difference between currents that the capacitor group is crossed two branch roads in normal state goes to zero.Therefore, the branch connection mode is more suitable for causing unsymmetrical current that the no fuse capacitor of bigger variation is arranged in a capacitor element damage usually.H type bridge differential line (shown in Fig. 1 (b)) is that capacitor group every is divided into 4 brachium pontis mutually, the capacitor group goes to zero at the balanced balanced current of normal state overcurrent instrument transformer, and this mode of connection all is fit to for the capacitor of outer fuse, interior fuse, no fuse.
Vertical double H-type bridge differential line (shown in Fig. 2 (a)) can be constituted after two H type bridge differential line series connection, horizontal double H-type bridge differential line (shown in Fig. 2 (b)) can be constituted after the parallel connection.In the application of large-scale inner fuse capacitor group, laterally double H-type bridge differential line mode is comparatively common.As shown in Figure 2, double H-type bridge differential line mode, be that the capacitor group of every phase is arranged by the requirement of two electric bridges, each electric bridge has four capacitor brachium pontis, intermediate potential place at each electric bridge is connected with current transformer, and the balanced balanced current that the capacitor group is crossed each current transformer in normal state goes to zero.Putting in order under all constant condition of group and single capacitor capacity, laterally the capacitor of the capacitor group single armed of the more single H type of dual H-bridge difference bridge differential line platform number in parallel reduces, effectively reduce because of certain capacitor breaks down, all the other capacitors when the fault capacitor discharges discharge the maximum of energy storage, thereby reduced the potential safety hazard of capacitor explosion; Simultaneously; laterally dual H-bridge and vertically dual H-bridge; can setting value be significantly improved by the component population in Gratz connection of effective minimizing the initial unbalance electric current is reduced at double, promptly by dwindling the sensitivity that monitoring range has improved unbalance protection effectively.
For large-scale inner fuse capacitor group, the capacitor element number is a lot, and the probability that symmetrical fault takes place is very important.Check that by strengthening electric capacity the measure of the frequency is not only wasted time and energy, passiveness is passive, and incompatible with the safety requirements of high pressure high-capacity inner fuse capacitor group.At present, inner fuse capacitor group unbalance protection is adjusted by segmented, set up one-level and report to the police before tripping operation, in case fuse action then move in warning in defining, scheme of arrangement maintenance has rapidly reduced the probability that symmetrical fault takes place to a certain extent.The more single H bridge of dual H-bridge difference differential line has increased a current transformer, has dwindled the monitoring range of current transformer, has reduced to take place the scope of symmetric fault, has also reduced the incidence of symmetrical fault theoretically to a certain extent.Therefore, when considering to improve the sensitivity of capacitor unbalance protection, also can consider to improve the precautionary measures of the mode of connection of capacitor group, to improve the reliability of unbalance protection as a kind of symmetric fault generation.
The initial unbalance electric current of capacitor group is directly determining the sensitivity of protection, and it depends on the uneven degree of system voltage, the manufacture deviation of capacitor and the temperature characterisitic of capacitor.The manufacture deviation of capacitor can be improved by the inner trim of capacitor group, but also can be subjected to the restriction of current transformer certainty of measurement.Depend primarily on the distribution and the variation in capacitor group temperature field by the capacitance deviation of capacitor temperature characterisitic generation.When the setting value of unsymmetrical current can't escape the initial unbalance electric current, the frequent malfunction meeting of unbalance protection reduced effective run time, the increase maintenance cost of capacitor group, even badly influenced the normal operation of capacitor group.When to fuse series capacitor bank in large-scale routinely the bridge difference carry out segmented protection and adjust when calculating, even capacitance deviation is reduced to minimum, also regular meeting the protection setting value appears and can't be by the situation of initial unbalance verification.In the process of adjusting; improving element allows the overvoltage multiple can increase setting value; to the eye can reduce the frequency of unbalance protection malfunction; as if improved the reliability of unbalance protection; its essence is exactly the more margin of safety of sacrificial capacitors, allows the inner fuse capacitor group continue operation under harsher state.Single H bridge difference in fact all is to improve the protection setting value by the method that changes capacitor set of connections mode than branch connection, the more single H bridge of dual H-bridge difference differential line, reduces the initial unbalance value.Therefore, the preferred optimization of capacitor set of connections mode is directly determining the reliability and the sensitivity of unbalance protection.
Summary of the invention
The purpose of this invention is to provide a kind of
Formula bridge difference electric capacitor apparatus; this device can effectively reduce initial unbalance protection value, improve capacitor unbalance protection setting value; and can not weaken anti-quick-fried ability and sacrifice element and allow the overvoltage multiple; dwindle the monitoring range of unbalance protection simultaneously; incidence, the raising that can reduce symmetrical fault discerned the redundancy of ability, the detection that can realize the part brachium pontis and the protection of breaking down capacitor group capacitor unit, helped shortening the processing time of whole fault, the reliability and the sensitivity that improve unbalance protection to a greater extent.
Purpose of the present invention adopts following technical proposals to be achieved:
A kind of
Formula bridge difference electric capacitor apparatus, described device comprise at least one capacitor group that phase-splitting is arranged; Its improvements are that described capacitor group adopts
Individual bridge differential line; Described
Individual bridge differential line be according to
Individual electric bridge martingale; Described
Individual electric bridge comprises six capacitor brachium pontis; Intermediate potential place at described electric bridge is connected with current transformer; The balanced balanced current that described capacitor group is crossed described current transformer in normal state goes to zero.
A kind of optimized technical scheme provided by the invention is: described
Corresponding six the capacitor brachium pontis of individual bridge; Described two capacitor brachium pontis constitute two electric bridges respectively as public brachium pontis and other four brachium pontis.
Second optimized technical scheme provided by the invention is: described
Individual bridge adopts horizontal or vertical two kinds of structural configuration.
The 3rd optimized technical scheme provided by the invention is: described
Formula bridge difference power capacitor can derive for
Bridge difference power capacitor,
Bridge difference power capacitor reaches
Bridge difference power capacitor.
The 4th optimized technical scheme provided by the invention is: described
Bridge difference power capacitor is vertical by at least one
Bridge is connected with at least one H type bridge or at least one is horizontal
Bridge and at least one H type bridge formation in parallel.
The 5th optimized technical scheme provided by the invention is: described
Bridge difference power capacitor by two vertically
Bridge difference capacitor group in parallel or two laterally
The series connection of bridge difference capacitor group constitutes; Described
Bridge difference power capacitor comprises four current transformers.
The 6th optimized technical scheme provided by the invention is: described
Bridge difference power capacitor comprises
Individual vertical
Bridge difference capacitor group; Described
Bridge difference power capacitor comprises four current transformers.
The 7th optimized technical scheme provided by the invention is: described
Formula bridge difference power capacitor can be derived and is vertically " N * 2 " matrix type bridge difference power capacitor and laterally " 2 * N " matrix type bridge difference power capacitor; Described vertically " N * 2 " matrix type bridge difference power capacitor comprises two capacitor group branch roads; Described every branch road has N group capacitor group; Described vertically " N * 2 " matrix type bridge difference power capacitors " N-1 " platform current transformer; Described laterally " 2 * N " matrix type bridge difference power capacitor comprises N bar capacitor group branch road; Described every branch road has 2 group capacitor groups, and described laterally " 2 * N " matrix type bridge difference power capacitor comprises " N-1 " platform current transformer.
The 8th optimized technical scheme provided by the invention is: described
Formula bridge difference power capacitor can be derived and is that " N * N " square formation type bridge difference power capacitor, described " N * N " square formation type bridge difference power capacitor comprise " N * N " group capacitor group and " (N-1) * (N-1) " platform current transformer.
Compared with prior art, the beneficial effect that reaches of the present invention is:
1, capacitor group unbalance protection setting value raising of the present invention, initial unbalance value reduce, and more traditional unsymmetrical current protected mode sensitivity is higher;
2, the capacitor group unbalance protection mode of connection of the present invention, reduced that the incidence of symmetric fault, the ability, the partition capacitance device brachium pontis that have improved identification capacitor unit fault coverage have realized detecting and the redundancy of protection, more traditional unsymmetrical current protected mode reliability is stronger;
3, clear thinking of the present invention, structure are simple and clear, applied range.
Description of drawings
Fig. 1 is the single-phase schematic diagram of branch connection of the prior art and single H bridge difference capacitor group;
Fig. 2 is the single-phase schematic diagram of dual H-bridge differential line capacitance device group of the prior art;
Fig. 3 is vertical
The single-phase schematic diagram of bridge spill current protection wiring capacitance device group;
Fig. 4 is horizontal
The single-phase schematic diagram of bridge spill current protection wiring capacitance device group;
Fig. 5 is
Pattern single vertically
The single-phase schematic diagram of bridge and single H type bridge series wiring capacitor group;
Fig. 6 is
Pattern is single laterally
The single-phase schematic diagram of bridge and single H type bridge wiring capacitance device in parallel group;
Fig. 7 is
Pattern two vertically
The single-phase schematic diagram of bridge wiring capacitance device in parallel group;
Fig. 8 is
Pattern two laterally
The single-phase schematic diagram of bridge series wiring capacitor group;
Fig. 9 is
The single-phase schematic diagram of bridge differential line capacitance device group;
Figure 10 is vertical
The single-phase schematic diagram of vertical " 4 * 2 " matrix type wiring capacitance device group of the pattern of vertically deriving;
Figure 11 is vertical
The single-phase schematic diagram of vertical " 5 * 2 " matrix type wiring capacitance device group of the pattern of vertically deriving;
Figure 12 is horizontal
The single-phase schematic diagram of horizontal " 2 * 4 " matrix type wiring capacitance device group of the pattern of laterally deriving;
Figure 13 is horizontal
The single-phase schematic diagram of horizontal " 2 * 5 " matrix type wiring capacitance device group of the pattern of laterally deriving;
Figure 14 is
The derive single-phase schematic diagram of " 4 * 4 " square formation type wiring capacitance device group of pattern of high-order;
Figure 15 is horizontal
The phase structure figure of bridge differential line capacitance device group;
Figure 16 is horizontal
The single-phase left side view of bridge differential line capacitance device group;
Figure 17 is horizontal
The single-phase vertical view of bridge differential line capacitance device group.
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Formula bridge difference electric capacitor apparatus, this device comprise a plurality of capacitor groups that phase-splitting is arranged, its basic pattern has vertically
Bridge is poor, as shown in Figure 3 with horizontal
Bridge is poor, two kinds of capacitor set of connections modes as shown in Figure 4.The capacitor group of every phase has six capacitor brachium pontis, is connected with current transformer at the intermediate potential place of each electric bridge, and the balanced balanced current that the capacitor group is crossed two current transformers in normal state goes to zero.
Compare with single H bridge differential line, four brachium pontis become six brachium pontis, and many current transformers, are putting in order under all constant condition of group and single capacitor capacity, vertically
Bridge difference and horizontal
Bridge is poor, can reduce the initial unbalance electric current by the component population that effectively reduces in the Gratz connection, improves the sensitivity of protection when reducing the malfunction possibility.Laterally
The bridge difference is compared with single H bridge differential line, make intact element under these two kinds of modes of connection reach identical overvoltage multiple and make capacitor unit reach identical overvoltage multiple, the former number of required excision element is more,, is guaranteeing that capacitor allows under the constant prerequisite of overvoltage multiple that is
The setting value of the unbalance protection under the formula bridge differential line mode is higher.In addition, horizontal
Bridge differential line mode is compared the capacitor that makes capacitor group single armed platform number in parallel and is reduced with single H bridge differential line, effectively reduce because of certain capacitor breaks down, all the other capacitors when the fault capacitor discharges discharge the maximum of energy storage, thereby reduced the potential safety hazard of capacitor explosion.
Owing to increased a current transformer, for vertically more
The more single H bridge of bridge differential line differential line has dwindled the monitoring range of every current transformer, and the probability that breaks down simultaneously at every group of symmetry brachium pontis is lower; For laterally
Bridge differential line, the probability itself that symmetrical fault takes place on one group of corresponding three brachium pontis simultaneously is just very low, compares with dual H-bridge differential line capacitance device, and the ability of its identification capacitor unit fault is stronger.As shown in Figure 4, the TA1 action when TA2 is failure to actuate, can recognizes on C2 and C3 two brachium pontis fault of the same type takes place simultaneously, has dwindled fault the scope at place takes place, and helps shortening the total time of handling failure.One-level is uneven reports to the police if set up again, can further remedy the defective that unbalance protection can't in time be discerned symmetrical fault, thereby make
The unbalance protection of bridge differential line mode has higher reliability at the unbalance protection than other traditional capacitor modes of connection aspect the strick precaution symmetrical fault.
For vertically
Bridge differential line shows as Fig. 3, and two brachium pontis of C3 and C4 are between two current transformers, and in a single day fault occurs on the brachium pontis of C3 or C4, and two current transformers can both monitor, and is redundant for the protection of C3 and two brachium pontis of C4 promptly also; For laterally
Bridge differential line shows as Fig. 4, and two brachium pontis of C2 and C5 are connected respectively with two current transformers jointly, and in a single day fault occurs on the brachium pontis of C2 or C5, and two current transformers can both monitor, and also is redundant for the protection of C2 and two brachium pontis of C5 promptly also.Therefore,
Under the bridge differential line mode, realized redundancy, obtained further raising than the global reliability of the capacitor bank protection of other traditional capacitor modes of connection for the wherein protection of two arms in six arms.
Pattern is a plurality of vertical
The parallel connection of bridge or a plurality of horizontal
The series connection of bridge.Fig. 7 is vertically two
The mode of connection of bridge parallel connection, Fig. 8 is laterally two
The mode of connection of bridge series connection.
Vertically
The pattern of vertically deriving form by " N * 2 " group capacitor group, " N-1 " platform current transformer, totally two branch roads, every branch road has N group capacitor group.Two kinds of modes of connection when Figure 10 and Figure 11 are respectively N=4 and N=5 claim vertically " 4 * 2 " matrix type and vertically " 5 * 2 " matrix type wiring.
Laterally
The pattern of laterally deriving form by " 2 * N " group capacitor group, " N-1 " platform current transformer, N bar branch road altogether, every branch road has 2 group capacitor groups.Two kinds of modes of connection when Figure 12 and Figure 13 are respectively N=4 and N=5 claim laterally " 2 * 4 " matrix type and laterally " 2 * 5 " matrix type wiring.
For improving sensitivity, reliability and the fail safe of capacitor group, merely by the platform number of increase current transformer and the platform number in parallel of capacitor, can make maintenance become very complicated, and impracticable.Generally can according to the platform number in parallel of capacitor group and 3 or with 4 whether be that the relation of integral multiple is selected following two kinds of comparatively practical modes of connection.
When the platform number in parallel of capacitor is 4 integral multiple, adopt
A kind of bridge differential line in the pattern is about to two vertically
Bridge differential line parallel, the capacitor group of every phase is by two
The requirement layout of electric bridge, as shown in Figure 7.Putting in order under all constant condition of group and single capacitor capacity,
Bridge differential line
The capacitor group of bridge differential line, the capacitor of each single armed platform number in parallel reduces, and effectively reduces because of certain capacitor breaks down, and all the other capacitors discharge the maximum of energy storage when the fault capacitor discharges, reduced the potential safety hazard of capacitor explosion; Simultaneously, make by the component population in Gratz connection of effective minimizing that setting value further improves, the initial unbalance electric current further reduces,
The sensitivity of bridge difference unbalance protection is higher.
When the platform number in parallel of capacitor is 3 integral multiple, can adopt
Bridge differential line, every by
Individual
Bridge differential line is formed, and as shown in Figure 9, nine capacitor brachium pontis is arranged promptly, is connected with current transformer at the intermediate potential place of each electric bridge, and the balanced balanced current that the capacitor group is crossed four current transformers in normal state goes to zero.Putting in order under all constant condition of group and single capacitor capacity,
Bridge differential line
The capacitor group of bridge differential line, the capacitor of each single armed platform number in parallel reduces, and effectively reduces because of certain capacitor breaks down, and all the other capacitors discharge the maximum of energy storage when the fault capacitor discharges, reduced the potential safety hazard of capacitor explosion; Simultaneously, make by the component population in Gratz connection of effective minimizing that setting value further improves, the initial unbalance electric current further reduces,
The sensitivity of bridge difference unbalance protection is higher.As shown in Figure 7
Bridge differential line is compared, and all needs 4 current transformers, and anti-quick-fried level is a little low slightly; single armed platform number is more slightly; the sensitivity of protection is low spot slightly, is redundant but the protection of the capacitor group of C2, C4, C5, C6, these 5 brachium pontis of C8 is arranged, and reliability is relatively higher.
Embodiment
Be respectively the view of single-phase 16 strings 48 and series capacitor bank shown in Figure 15,16, corresponding to horizontal among Fig. 4
The single-phase schematic diagram of bridge differential line capacitance device group, it can be implemented in the following manner:
Capacitor group in the present embodiment adopts the inner fuse capacitor group.
This phase capacitor component is
Individual electric bridge, 6 brachium pontis are arranged, form six towers, arrange a brachium pontis on every tower, and the tower upper support has the pedestal column insulator, and described brachium pontis is arranged on the pedestal column insulator.
As shown in Figure 4, have six brachium pontis, capacitor group C1, C2, C4, C5 constitute an electric bridge, and C2, C3, C5, C6 constitute another electric bridge again, and two brachium pontis that capacitor group C2 and C5 constitute are public brachium pontis of described two electric bridges.Intermediate potential place at each electric bridge is connected with current transformer, and the balanced balanced current that the capacitor group is crossed each current transformer in normal state goes to zero.
Shown in Figure 15,16,17, every tower is arranged four layer capacitor groups, and every layer capacitor group is lain on one's side and is arranged on the hot galvanizing shaped steel stand.As shown in figure 17, the capacitor group of upper left tower constitutes capacitor group C1, in go up tower the capacitor group constitute capacitor group C2, the capacitor group of upper right tower constitutes capacitor group C3; The capacitor group of lower-left tower constitutes capacitor group C4, in down the capacitor group of tower constitute capacitor group C5, the capacitor group of bottom right tower constitutes capacitor group C6.The top of C1, C2, C3 tower is connected with high voltage bus jointly, by 3 branch road C1-C4 that each brachium pontis capacitor group connection in series-parallel forms, and C2-C5, C3-C6 arrives at the bottom of the tower; Pipe mother at the bottom of the tower is connecting again at the bottom of the tower of C4, C5, C6, by 82 and the branch road that each brachium pontis capacitor group connection in series-parallel forms, arrives the cat head of C4, C5, C6, is connected with low-voltage bus bar.Intermediate potential place between branch road C1-C4 and C2-C5, C2-C5 and C3-C6 branch road connects unsymmetrical current detection current transformer TA1 and TA2 respectively.Branch road C1-C4, branch road C2-C5 and current transformer TA1 can form an electric bridge; Branch road C2-C5, branch road C3-C6 and current transformer TA2 can form another electric bridge; Branch road C2-C5 is the common branch of two electric bridges.
Current transformer TA1 and TA2 are arranged in the outside of each tower.
Provided by the invention
Formula bridge difference electric capacitor apparatus can effectively reduce initial unbalance protection value, improve capacitor unbalance protection setting value; and can not weaken anti-quick-fried ability and sacrifice element and allow the overvoltage multiple; dwindle the monitoring range of unbalance protection simultaneously; incidence, the raising that can reduce symmetrical fault discerned the redundancy of ability, the detection that can realize the part brachium pontis and the protection of breaking down capacitor group capacitor unit, helped shortening the processing time of whole fault, the reliability and the sensitivity that improve unbalance protection to a greater extent.
Should be noted that at last: only illustrate that in conjunction with the foregoing description technical scheme of the present invention is not intended to limit.Those of ordinary skill in the field are to be understood that: those skilled in the art can make amendment or are equal to replacement the specific embodiment of the present invention, but these modifications or change are all among the claim protection range that application is awaited the reply.
Claims (9)
1. one kind
Formula bridge difference electric capacitor apparatus, described device comprise at least one capacitor group that phase-splitting is arranged; It is characterized in that described capacitor group adopts
Individual bridge differential line; Described
Individual bridge differential line be according to
Individual electric bridge martingale; Described
Individual electric bridge comprises six capacitor brachium pontis; Intermediate potential place at described electric bridge is connected with current transformer; The balanced balanced current that described capacitor group is crossed described current transformer in normal state goes to zero.
2. as claimed in claim 1
Formula bridge difference electric capacitor apparatus is characterized in that, and is described
Corresponding six the capacitor brachium pontis of individual bridge; Described two capacitor brachium pontis constitute two electric bridges respectively as public brachium pontis and other four brachium pontis.
3. arbitrary described as claim 1-2
Formula bridge difference electric capacitor apparatus is characterized in that, and is described
Individual bridge adopts horizontal or vertical two kinds of structural configuration.
4. as claimed in claim 1
Formula bridge difference electric capacitor apparatus is characterized in that, and is described
Formula bridge difference power capacitor can derive for
Bridge difference power capacitor,
Bridge difference power capacitor reaches
Bridge difference power capacitor.
5. as claimed in claim 4
Formula bridge difference electric capacitor apparatus is characterized in that, and is described
Bridge difference power capacitor is vertical by at least one
Bridge is connected with at least one H type bridge or at least one is horizontal
Bridge and at least one H type bridge formation in parallel.
6. as claimed in claim 4
Formula bridge difference electric capacitor apparatus is characterized in that, and is described
Bridge difference power capacitor by two vertically
Bridge difference capacitor group in parallel or two laterally
The series connection of bridge difference capacitor group constitutes; Described
Bridge difference power capacitor comprises four current transformers.
7. as claimed in claim 4
Formula bridge difference electric capacitor apparatus is characterized in that, and is described
Bridge difference power capacitor comprises
Individual vertical
Bridge difference capacitor group; Described
Bridge difference power capacitor comprises four current transformers.
8. as claimed in claim 1
Formula bridge difference electric capacitor apparatus is characterized in that, and is described
Formula bridge difference power capacitor can be derived and is vertically " N * 2 " matrix type bridge difference power capacitor and laterally " 2 * N " matrix type bridge difference power capacitor; Described vertically " N * 2 " matrix type bridge difference power capacitor comprises two capacitor group branch roads; Described every branch road has N group capacitor group; Described vertically " N * 2 " matrix type bridge difference power capacitors " N-1 " platform current transformer; Described laterally " 2 * N " matrix type bridge difference power capacitor comprises N bar capacitor group branch road; Described every branch road has 2 group capacitor groups, and described laterally " 2 * N " matrix type bridge difference power capacitor comprises " N-1 " platform current transformer.
9. as claimed in claim 1
Formula bridge difference electric capacitor apparatus is characterized in that, and is described
Formula bridge difference power capacitor can be derived and is that " N * N " square formation type bridge difference power capacitor, described " N * N " square formation type bridge difference power capacitor comprise " N * N " group capacitor group and " (N-1) * (N-1) " platform current transformer.
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| CN102938556A (en) * | 2012-10-24 | 2013-02-20 | 上海市电力公司 | Protecting, measuring and controlling integrated device with unbalanced current protection function for capacitor |
| CN103344843A (en) * | 2013-07-29 | 2013-10-09 | 国家电网公司 | Measurement system of series compensation capacitor group |
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| CN111541379A (en) * | 2020-03-05 | 2020-08-14 | 卡乐电子(苏州)有限责任公司 | Controller with inverter for refrigeration machine |
| CN113922385A (en) * | 2021-11-09 | 2022-01-11 | 国网辽宁省电力有限公司抚顺供电公司 | Bridge difference current adjustment strategy for capacitor bank balance bridge |
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| CN201199631Y (en) * | 2008-04-24 | 2009-02-25 | 国家电网公司 | Double-bridge difference power capacitor apparatus |
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| CN102938556A (en) * | 2012-10-24 | 2013-02-20 | 上海市电力公司 | Protecting, measuring and controlling integrated device with unbalanced current protection function for capacitor |
| CN102938556B (en) * | 2012-10-24 | 2016-04-20 | 上海市电力公司 | With the capacitor protection measurement and control integration device of unbalanced current protection function |
| CN103344843A (en) * | 2013-07-29 | 2013-10-09 | 国家电网公司 | Measurement system of series compensation capacitor group |
| RU2645715C2 (en) * | 2013-11-15 | 2018-02-28 | Машиненфабрик Райнхаузен Гмбх | Method and device for controlling capacitor bushings for three-phase ac system |
| CN106707102A (en) * | 2016-12-09 | 2017-05-24 | 中国西电电气股份有限公司 | Capacitor bank main wiring structure and fault judgment method |
| CN111541379A (en) * | 2020-03-05 | 2020-08-14 | 卡乐电子(苏州)有限责任公司 | Controller with inverter for refrigeration machine |
| CN113922385A (en) * | 2021-11-09 | 2022-01-11 | 国网辽宁省电力有限公司抚顺供电公司 | Bridge difference current adjustment strategy for capacitor bank balance bridge |
| CN113922385B (en) * | 2021-11-09 | 2023-10-10 | 国网辽宁省电力有限公司抚顺供电公司 | Bridge difference current adjustment strategy for capacitor bank balance bridge |
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