CN203800579U - AC filter large-group online protection self-adaptive selection system - Google Patents
AC filter large-group online protection self-adaptive selection system Download PDFInfo
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- CN203800579U CN203800579U CN201420185506.XU CN201420185506U CN203800579U CN 203800579 U CN203800579 U CN 203800579U CN 201420185506 U CN201420185506 U CN 201420185506U CN 203800579 U CN203800579 U CN 203800579U
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Abstract
The utility model discloses an AC filter large-group online protection self-adaptive selection system. The system comprises an AC filer online protection input unit, and is characterized by further comprising a first multiplier, a second multiplier, a first switch state determining branch and a second switch state determining branch. When there is a switching-off state among a first switch, a first isolation switch and a second isolation switch, the first switch state determining branch outputs a state value 1; when there is a switching-off state among a second switch, a third isolation switch and a fourth isolation switch, the second switch stage determining branch outputs a state value 1; the output end of the first multiplier and the output end of the second multiplier are respectively connected with two input ends of the AC filer online protection input unit; two input ends of the first multiplier are respectively connected with the first switch state determining branch and a current transformer T1; and two input ends of the second multiplier are respectively connected with the second switch state determining branch and a current transformer T2. The advantages are as follows: a circuit break state line is automatically selected and is juxtaposed as zero, and maloperaiton is eliminated.
Description
Technical field
The utility model belongs to the protection system technical field of large group of on line of alternating current filter, is specifically related to large group of on line of a kind of alternating current filter and protects adaptively selected system.
Background technology
The connection diagram of large group of on line of alternating current filter as shown in Figure 1, the first isolating switch 50711 and the second isolating switch 50712 that first group of circuit comprises the first switch 5071 and be arranged on the first switch 5071 both sides and be connected in series with the first switch 5071, in this first group of circuit, be also in series with current transformer T1, this first group of circuit is connected between the first bus and the input of alternating current filter; The 3rd isolating switch 50721 and the 4th isolating switch 50722 that second group of circuit comprises second switch 5072 and be arranged on second switch 5072 both sides and be connected in series with second switch 5072, in this second group of circuit, be also in series with current transformer T2, this second group of circuit is connected between the second bus and the input of alternating current filter.D.C mutual-inductor T1 and D.C mutual-inductor T2 can monitor the current value of alternating current the current value monitoring by its output output.
The logical construction that large group of on line of alternating current filter of prior art protected adaptively selected system as shown in Figure 2, it comprises alternating current filter on line protection input unit 1, this alternating current filter on line protection input unit 1 has at least two inputs and an output, the output of D.C mutual-inductor T1 and D.C mutual-inductor T2 is connected with two inputs in a plurality of inputs of alternating current filter on line protection input unit 1 respectively, the control end that divide/closes of the first switch 5071 and second switch 5072 is all connected to the output that alternating current filter on line is protected input unit 1, the first switch 5071 and second switch 5072 by its minute/close control end control its minute/close state.Described alternating current filter on line protection input unit 1 can be set trip threshold; when the current value sum of each input input is greater than the current threshold of setting; the control signal that its output output control first switch 5071 and second switch 5072 trip, making the first switch 5071 and second switch 5072 tripping operations is a minute position.
During normal operation, the first switch 5071 and second switch 5072 are in co-bit, the first switch 5071 and second switch 5072 are in closing position, and the disconnecting link of the first isolating switch 50711, the second isolating switch 50712, the 3rd isolating switch 50721 and the 4th isolating switch 50722 is all in co-bit; Now, the electric current by two current transformer T1, T2 is I1, I2, and the electric current I by alternating current filter is I1+I2.
Existing protective device has gathered respectively the electric current of current transformer T1 summation current transformer T2; be that alternating current filter on line protection input unit 1 is treated as basis for estimation by the interflow I of I1+I2; when collaborating the threshold value of I> setting; protection will be moved: tripping the first switch 5071 and second switch 5072, make the first switch 5071 and second switch 5072 in a minute position.
Take the first bus as 1M, and the second bus is 2M, and setting threshold is that 1.5 pu are example.When one of them switch overhauls, suppose that second switch 5072 overhauls, now, alternating current filter will be powered by the first switch 5071 intervals, due to I2=0, alternating current filter on line electric current I=I1+I2=I1=1pu now.If while now carrying out beam work at second switch 5072 intervals to current transformer T2; if I2 beam is greater than 0.5pu; alternating current filter on line I=I1+I2>1.5pu now; to cause protection action; send the order that makes the first switch 5071 and second switch 5072 tripping operations, belong to the situation of misoperation.Cause interval that the reason of this problem is that the alternating current filter on line protection system of prior art fails to judge the first switch 5071, second switch 5072 in time whether in running status; when wherein certain switch gap is not in running status; the magnitude of current in this interval should be deducted from computational logic, and the alternating current filter on line protection system of prior art this function not.
Utility model content
Goal of the invention of the present utility model is: for the problem of above-mentioned existence, provide large group of on line of a kind of alternating current filter to protect adaptively selected system.
The technical solution adopted in the utility model is such: large group of on line of a kind of alternating current filter protected adaptively selected system; comprise alternating current filter on line protection input unit, also comprise the first multiplier, the second multiplier, the first on off state judgement branch road and second switch state judgement branch road.In the first switch, the first isolating switch and the second isolating switch any one for minute position is during state, described the first on off state judgement branch road output state value 0; In second switch, the 3rd isolating switch and the 4th isolating switch any one for minute position is during state, described second switch state judgement branch road output state value 0.The output of described the first multiplier is connected to an input of alternating current filter on line protection input unit, and two inputs connect respectively the output of the first on off state judgement branch road summation current transformer T1; The output of described the second multiplier is connected to another input of alternating current filter on line protection input unit, and two inputs connect respectively the output of second switch state judgement branch road summation current transformer T2.
In above-mentioned system, as optimal way, described the first on off state judgement branch road comprises: the first reverser, the first time delay integration module, the one or three input or door; The disconnecting link of the first isolating switch divides the disconnecting link of a signal output part, the second isolating switch to divide minute position signal output part of a signal output part and the first switch to be connected with three inputs of the one or three input or door respectively; The output of the one or three input or door is connected to the input of the first time delay integration module, and the output of the first time delay integration module is connected to the input of the first multiplier by the first reverser.Described second switch state judgement branch road comprises: the 4th reverser, the second time delay integration module, the two or three input or door; The disconnecting link of the 3rd isolating switch divides the disconnecting link of a signal output part, the 4th isolating switch to divide minute position signal output part of a signal output part and second switch to be connected with three inputs of the two or three input or door respectively; The output of the two or three input or door is connected to the input of the second time delay integration module, and the output of the second time delay integration module is connected to the input of the second multiplier by the 4th reverser.
In above-mentioned system, as further optimal way, described the first on off state judgement branch road comprises: the first reverser, the first time delay integration module, the one or three input or door, first with door, second and, the second reverser and the 3rd reverser; The disconnecting link co-bit signal output part of the first isolating switch by the second reverser be connected to first with door an input, the disconnecting link of the first isolating switch divide a signal output part be connected to first with door another input; The disconnecting link co-bit signal output part of the second isolating switch by the 3rd reverser be connected to second with door an input, the disconnecting link of the second isolating switch divide a signal output part be connected to second with door another input; Minute position signal output part of the first switch, first is connected with three inputs of the one or three input or door respectively with the output of door with second with the output of door; The output of the one or three input or door is connected to the input of the first time delay integration module, and the output of the first time delay integration module is connected to the input of the first multiplier by the first reverser.
Described second switch state judgement branch road comprises: the 4th reverser, the second time delay integration module, the two or three input or door, the 3rd with door, the 4th with door, the 5th reverser and the 6th reverser; The disconnecting link co-bit signal output part of the 3rd isolating switch by the 5th reverser be connected to the 3rd with door an input, the disconnecting link of the 3rd isolating switch divide a signal output part be connected to the 3rd with door another input; The disconnecting link co-bit signal output part of the 4th isolating switch by the 6th reverser be connected to the 4th with door an input, the disconnecting link of the 4th isolating switch divide a signal output part be connected to the 4th with door another input; Minute position signal output part of second switch, the 3rd is connected with three inputs of the two or three input or door respectively with the output of door with the 4th with the output of door; The output of the two or three input or door is connected to the input of the second time delay integration module, and the output of the second time delay integration module is connected to the input of the second multiplier by the 4th reverser.
In sum; owing to having adopted technique scheme; the beneficial effects of the utility model are: before certain the group circuit in off state that can automatically select is entering alternating current filter on line protection input unit, remove, solved the problem that prior art exists, stop misoperation.
Accompanying drawing explanation
Fig. 1 is the connection diagram of large group of on line of alternating current filter.
Fig. 2 is that prior art exchanges the logical construction principle schematic that large group of on line of oscilloscope protected adaptively selected system.
Fig. 3 is that the utility model embodiment mono-exchanges the logical construction principle schematic that large group of on line of oscilloscope protected adaptively selected system.
Fig. 4 is that the utility model embodiment bis-exchanges the logical construction principle schematic that large group of on line of oscilloscope protected adaptively selected system.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
In prior art, the first switch 5071 using in large group of on line of alternating current filter and second switch 5072 include co-bit/open a status monitoring output function; When switch is during in co-bit, by co-bit state output end output state value 0, otherwise co-bit state output end output state value 0; When switch is when leaving, by opening a state output end output state value 0, otherwise open a state output end output state value 0.Even if the switch adopting does not have out the function of position/co-bit status monitoring output, the monitoring device of a installation that also can be independent in switch (co-bit/open) in place state, with the state in place of monitoring switch.
In large group of on line of alternating current filter, use isolating switch also generally there is co-bit/open a status monitoring output function; When the disconnecting link of isolating switch is during in co-bit, by co-bit state output end output state value 1, otherwise co-bit state output end output state value 0; When the disconnecting link of isolating switch is when opening, by opening a state output end output state value 1, otherwise open a state output end output state value 0.Even if the isolating switch adopting does not have out the function of position/co-bit status monitoring output, the monitoring device of a installation that also can be independent in isolating switch (co-bit/open) in place state, with the state in place of monitoring switch.
In the embodiment of this patent; utilize exactly at switch and isolating switch and there is co-bit/open a status monitoring output function or can install the monitoring device that (co-bit/open position) in place state is installed additional; the Adaptable System that realizes large group of on line protection of the utility model alternating current filter, specific embodiment is as follows.
embodiment mono-:
Large group of on line of a kind of alternating current filter of this embodiment protected adaptively selected system; as shown in Figure 3; comprise alternating current filter on line protection input unit 1, also comprise the first multiplier 10, the second multiplier 20, the first on off state judgement branch road and second switch state judgement branch road.In the first switch 5071, the first isolating switch 50711 and the second isolating switch 50712 any one for minute position is during state, described the first on off state judgement branch road output state value 1; In second switch 5072, the 3rd isolating switch 50721 and the 4th isolating switch 50722 any one for minute position is during state, described second switch state judgement branch road output state value 1.The output of described the first multiplier 10 is connected to an input of alternating current filter on line protection input unit 1, and two inputs connect respectively the output of the first on off state judgement branch road summation current transformer T1; The output of described the second multiplier 20 is connected to another input of alternating current filter on line protection input unit 1, and two inputs connect respectively the output of second switch state judgement branch road summation current transformer T2.
In above-mentioned system configuration, when first group of circuit overhauled, the first switch 5071, in the first isolating switch 50711 and the second isolating switch 50712, has one at least in opening position, now when calculating, the current value that is input to alternating current filter on line protection input unit 1 in the situation that the current value that just the current transformer T1 of this first group of circuit need to be monitored is any value all should be set to 0, need the first switch 5071, the state of the first isolating switch 50711 and the second isolating switch 50712 is monitored, when the first switch 5071, any in the first isolating switch 50711 and the second isolating switch 50712 have one for minute position is during state, described the first on off state judgement branch road output state value 1, after the first inverter 11 is anti-phase, to output to the value of the first multiplier 10 be just 0 to this state value 1 so, the current value that now no matter current transformer T1 monitors is how many, the value that described the first multiplier 10 outputs to alternating current filter on line protection input unit 1 is 0, the current value of first group of circuit is carried out automatically selecting to having reduced when alternating current filter on line protection input unit 1 calculates.
In like manner, when second group of circuit overhauled, second switch 5072, in the 3rd isolating switch 50721 and the 4th isolating switch 50722, has one at least in opening position, now when calculating, the current value that is input to alternating current filter on line protection input unit 1 in the situation that the current value that just this current transformer T2 need to be monitored is any value all should be set to 0, need second switch 5072, the state of the 3rd isolating switch 50721 and the 4th isolating switch 50722 is monitored, when second switch 5072, any in the 3rd isolating switch 50721 and the 4th isolating switch 50722 have one for minute position is during state, described second switch state judgement branch road output state value 1, after the 4th inverter 21 is anti-phase, to output to the value of the second multiplier 20 be just 0 to this state value 1 so, the current value that now no matter current transformer T2 monitors is how many, the value that described the second multiplier 20 outputs to alternating current filter on line protection input unit 1 is 0, the current value of second group of circuit is carried out automatically selecting to having reduced when alternating current filter on line protection input unit 1 calculates.
About realizing the structure of above-mentioned functions object the first on off state judgement branch road and second switch state judgement branch road, be not limited to adopt any tactic pattern, as long as can realize above-mentioned purpose; Can carry out the above-mentioned functions that logical operation realizes above-mentioned the first on off state judgement branch road and second switch state judgement branch road by programmable device operating software.The utility model proposes a kind of more excellent implementation, specific as follows:
Described the first on off state judgement branch road comprises: the first reverser 11, the first the 12, the 1 input of time delay integration module or door 13; The disconnecting link of the first isolating switch 50711 divides the disconnecting link of a signal output part, the second isolating switch 50712 to divide minute position signal output part of a signal output part and the first switch 5071 to be connected with three inputs of the one or three input or door 13 respectively; The output of the one or three input or door 13 is connected to the input of the first time delay integration module 12, and the output of the first time delay integration module 12 is connected to the input of the first multiplier 10 by the first reverser 11.
Described second switch state judgement branch road comprises: the 4th reverser 21, the second the 22, the 23 input of time delay integration module or door 23; The disconnecting link of the 3rd isolating switch 50721 divides 50722 disconnecting link of a signal output part, the 4th isolating switch to divide minute position signal output part of a signal output part and second switch 5072 to be connected with three inputs of the two or three input or door 23 respectively; The output of the two or three input or door 23 is connected to the input of the second time delay integration module 22, and the output of the second time delay integration module 22 is connected to the input of the second multiplier 20 by the 4th reverser 21.
In the first on off state judgement branch road, in the first switch 5071, the first isolating switch 50711 and the second isolating switch 50712, have at least one to be when opening position, be that they have one in the middle of three at least to open a state value for signal output part output be 1, through output after the one or three input or door 13 is exactly state value 1, still the still hold mode value that judgement is inputted after the first time delay integration module 12 keeps 1s is 1, and output state value 1.
In like manner, in second switch state judgement branch road, in second switch 5072, the 3rd isolating switch 50721 and the 4th isolating switch 50722, have at least one to be when opening position, be that they have one in the middle of three at least to open a state value for signal output part output be 1, through output after the two or three input or door 23 is state value 1, after the second time delay integration module 22 keeps 1s, the still hold mode value of judgement input is 1, and output state value 1.
embodiment bis-:
Embodiment bis-and embodiment once difference be that on the first on off state judgement branch road and second switch state judgement branch road, structure chart as shown in Figure 4.
Concrete, described the first on off state judgement branch road also comprises: first with door 14, second with the 15, second reverser 16 and the 3rd reverser 17; The disconnecting link co-bit signal output part of the first isolating switch 50711 by the second reverser 16 be connected to first with a door input of 14, the disconnecting link of the first isolating switch 50711 divide a signal output part be connected to first with another input of door 14; The disconnecting link co-bit signal output part of the second isolating switch 50712 by the 3rd reverser 17 be connected to second with a door input of 15, the disconnecting link of the second isolating switch 50712 divide a signal output part be connected to second with another input of door 15; Minute position signal output part of the first switch 5071, first is connected with three inputs of the one or three input or door 13 respectively with the output of door 15 with second with the output of door 14; The output of the one or three input or door 13 is connected to the input of the first time delay integration module 12, and the output of the first time delay integration module 12 is connected to the input of the first multiplier 10 by the first reverser 11.
Described second switch state judgement branch road also comprises: the 3rd with door the 24, the 4th and door the 25, the 5th reverser 26 and the 6th reverser 27; The disconnecting link co-bit signal output part of the 3rd isolating switch 50721 by the 5th reverser 26 be connected to the 3rd with a door input of 24, the disconnecting link of the 3rd isolating switch 50721 divide a signal output part be connected to the 3rd with another input of door 24; The disconnecting link co-bit signal output part of the 4th isolating switch 50722 by the 6th reverser 27 be connected to the 4th with a door input of 25, the disconnecting link of the 4th isolating switch 50722 divide a signal output part be connected to the 4th with another input of door 25; Minute position signal output part of second switch 5072, the 3rd is connected with three inputs of the two or three input or door 23 respectively with the output of door 25 with the 4th with the output of door 24; The output of the two or three input or door 23 is connected to the input of the second time delay integration module 22, and the output of the second time delay integration module 22 is connected to the input of the second multiplier 20 by the 4th reverser 21.
In the first on off state judgement branch road, increase by first with door 14, second with the 15, second inverter 16 and the 3rd inverter 17, and add the disconnecting link co-bit signal of the first isolating switch 50711 and the disconnecting link co-bit signal of the second isolating switch 50712, when preventing that the disconnecting link of the first isolating switch 50711 from dividing the disconnecting link of a signal and the second isolating switch 50712 to divide a signal to occur disturbance, make the first on off state judgement branch road misoperation, compare with embodiment mono-, increase stability, prevented misoperation.
In second switch state judgement branch road, increase the 3rd with door the 24, the 4th with door the 25, the 5th inverter 26 and a hex inverter 27, and add the disconnecting link co-bit signal of the 3rd isolating switch 50721 and the disconnecting link co-bit signal of the 4th isolating switch 50722, when preventing that the disconnecting link of the 3rd isolating switch 50721 from dividing the disconnecting link of a signal and the 4th isolating switch 50722 to divide a signal to occur disturbance, make the misoperation of second switch state judgement branch road, compare with embodiment mono-, increase stability, prevented misoperation.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (3)
1. large group of on line of an alternating current filter protected adaptively selected system, comprise alternating current filter on line protection input unit (1), it is characterized in that, also comprise the first multiplier (10), the second multiplier (20), the first on off state judgement branch road and second switch state judgement branch road;
In the first switch (5071), the first isolating switch (50711) and the second isolating switch (50712) any one for minute position is during state, described the first on off state judgement branch road output state value 0; In second switch (5072), the 3rd isolating switch (50721) and the 4th isolating switch (50722) any one for minute position is during state, described second switch state judgement branch road output state value 0;
The output of described the first multiplier (10) is connected to an input of alternating current filter on line protection input unit (1), and two inputs connect respectively the output of the first on off state judgement branch road summation current transformer T1; The output of described the second multiplier (20) is connected to another input of alternating current filter on line protection input unit (1), and two inputs connect respectively the output of second switch state judgement branch road summation current transformer T2.
2. large group of on line of alternating current filter according to claim 1 protected adaptively selected system, it is characterized in that, described the first on off state judgement branch road comprises: the first reverser (11), the first time delay integration module (12), the one or three input or door (13); The disconnecting link of the first isolating switch (50711) divides the disconnecting link of a signal output part, the second isolating switch (50712) to divide minute position signal output part of a signal output part and the first switch (5071) to be connected with three inputs of the one or three input or door (13) respectively; The output of the one or three input or door (13) is connected to the input of the first time delay integration module (12), and the output of the first time delay integration module (12) is connected to the input of the first multiplier (10) by the first reverser (11);
Described second switch state judgement branch road comprises: the 4th reverser (21), the second time delay integration module (22), the two or three input or door (23); The disconnecting link of the 3rd isolating switch (50721) divides the disconnecting link of a signal output part, the 4th isolating switch (50722) to divide minute position signal output part of a signal output part and second switch (5072) to be connected with three inputs of the two or three input or door (23) respectively; The output of the two or three input or door (23) is connected to the input of the second time delay integration module (22), and the output of the second time delay integration module (22) is connected to the input of the second multiplier (20) by the 4th reverser (21).
3. large group of on line of alternating current filter according to claim 1 protected adaptively selected system, it is characterized in that, described the first on off state judgement branch road comprises: the first reverser (11), the first time delay integration module (12), the one or three input or door (13), first with door (14), second and (15), the second reverser (16) and the 3rd reverser (17); The disconnecting link co-bit signal output part of the first isolating switch (50711) by the second reverser (16) be connected to first with door (14) an input, the disconnecting link of the first isolating switch (50711) divide a signal output part be connected to first with door (14) another input; The disconnecting link co-bit signal output part of the second isolating switch (50712) by the 3rd reverser (17) be connected to second with door (15) an input, the disconnecting link of the second isolating switch (50712) divide a signal output part be connected to second with door (15) another input; Minute position signal output part of the first switch (5071), first is connected with three inputs of the one or three input or door (13) respectively with the output of door (15) with second with the output of door (14); The output of the one or three input or door (13) is connected to the input of the first time delay integration module (12), and the output of the first time delay integration module (12) is connected to the input of the first multiplier (10) by the first reverser (11);
Described second switch state judgement branch road comprises: the 4th reverser (21), the second time delay integration module (22), the two or three input or door (23), the 3rd with door (24), the 4th with door (25), the 5th reverser (26) and the 6th reverser (27); The disconnecting link co-bit signal output part of the 3rd isolating switch (50721) by the 5th reverser (26) be connected to the 3rd with door (24) an input, the disconnecting link of the 3rd isolating switch (50721) divide a signal output part be connected to the 3rd with door (24) another input; The disconnecting link co-bit signal output part of the 4th isolating switch (50722) by the 6th reverser (27) be connected to the 4th with door (25) an input, the disconnecting link of the 4th isolating switch (50722) divide a signal output part be connected to the 4th with door (25) another input; Minute position signal output part of second switch (5072), the 3rd is connected with three inputs of the two or three input or door (23) respectively with the output of door (25) with the 4th with the output of door (24); The output of the two or three input or door (23) is connected to the input of the second time delay integration module (22), and the output of the second time delay integration module (22) is connected to the input of the second multiplier (20) by the 4th reverser (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420185506.XU CN203800579U (en) | 2014-04-17 | 2014-04-17 | AC filter large-group online protection self-adaptive selection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420185506.XU CN203800579U (en) | 2014-04-17 | 2014-04-17 | AC filter large-group online protection self-adaptive selection system |
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| CN203800579U true CN203800579U (en) | 2014-08-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071383A (en) * | 2015-08-07 | 2015-11-18 | 国家电网公司 | Automatic voltage switching control circuit for merging unit of intelligent substation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071383A (en) * | 2015-08-07 | 2015-11-18 | 国家电网公司 | Automatic voltage switching control circuit for merging unit of intelligent substation |
| CN105071383B (en) * | 2015-08-07 | 2018-02-09 | 国家电网公司 | Intelligent substation merging unit voltage automatic switching control circuit |
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