CN204118716U - A kind of distributed power source failure protecting device being applicable to multi-source electrical network - Google Patents
A kind of distributed power source failure protecting device being applicable to multi-source electrical network Download PDFInfo
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Abstract
The utility model belongs to field of power system control, is specifically related to a kind of distributed power source failure protecting device being applicable to multi-source electrical network.This device comprises central monitoring unit, A Entropy density deviation formula power faiture safe unit, B Entropy density deviation formula power faiture safe unit, C Entropy density deviation formula power faiture safe unit and converter.Amplitude of short circuit during the utility model utilizes the inductance in fault secure circuit to come fault current limiting moment of fault current rising rate of change and fault traversing, utilize inductance to the inhibitory action of curent change during suppression electric current instantaneous peak value, can run with under system fault condition normal, reduce fault current to the impact of equipment; Ensure that the realization of low voltage crossing technology; The response time delay of proterctive equipment switching can be avoided, can suppress timely and effectively amplitude of short circuit during fault current instantaneous peak value and fault traversing, avoid it to cause damage to source equipment.
Description
Technical field
The utility model patent belongs to field of power system control, is specifically related to a kind of distributed power source failure protecting device being applicable to multi-source electrical network.
Background technology
Along with the continuous maturation of generation of electricity by new energy technology, a large amount of distributed power source access electrical network, for for multiclass distributed power source electrical network, when there is grid voltage sags catastrophe failure in requirement (as three phase short circuit fault etc.), distributed power source does not carry out cutting machine operation as far as possible, distributed power source cut out the chain reaction that a large amount of distributed power source may be caused from grid disconnection, cause larger subsequent perturbations and more serious fault, and the again grid-connected input after distributed power source fault recovery also can cause trend sudden change in net, very large impact is brought to net internal loading, also be huge to the damaging of power electronic equipment in net simultaneously, therefore require that in net, distributed power source will have certain low voltage ride-through capability, up to now, fault traversing technology also only rests on and adopts single Crowbar crow bar protective circuit for distributed source, carry out excess power release when breaking down, or only rely on the effect regulating distributed power source current transformer control mode to suppress fault current, there is serious limitation in these technology, first, for double-fed blower fan, the parallel connection access generator amature side of Crowbar crow bar protective circuit, detect network system break down there is Voltage Drop time, in order to limit electric current and the rotor windings overvoltage of current transformer, required locking double fed induction generators rotor-side converter, generator simultaneously switchover operation state is that induction motor mode is run, and could maintain generator not off-grid operation, secondly the maximum fault that appears at of fault current instantaneous peak value occurs and two moments of failture evacuation, maximum to equipment impact, and the controlled impact of proterctive equipment switching and have time delay, to the suppression of fault current instantaneous peak value not in time.
Utility model content
For the shortcoming that above-mentioned prior art exists; the utility model proposes a kind of distributed power source failure protecting device being applicable to multi-source electrical network; amplitude of short circuit between suppression short circuit current instantaneous peak value and age at failure is made to reach; avoid current transformer to damage, realize the object of distributed power source fault traversing.
A kind of distributed power source failure protecting device being applicable to multi-source electrical network; this device comprises central monitoring unit, A Entropy density deviation formula power faiture safe unit, B Entropy density deviation formula power faiture safe unit, C Entropy density deviation formula power faiture safe unit and converter; wherein
The first input end of described A Entropy density deviation formula power faiture safe unit, the first input end of B Entropy density deviation formula power faiture safe unit and the first input end of C Entropy density deviation formula power faiture safe unit are all connected the output of distributed power source, first output of A Entropy density deviation formula power faiture safe unit, the first output of B Entropy density deviation formula power faiture safe unit and the first output of C Entropy density deviation formula power faiture safe unit are all connected three road inputs of converter, the output access electrical network of converter;
Second input of described A Entropy density deviation formula power faiture safe unit, the second input of B Entropy density deviation formula power faiture safe unit are connected three road outputs of central monitoring unit with the second input of C Entropy density deviation formula power faiture safe unit, the second output of A Entropy density deviation formula power faiture safe unit, the second output of B Entropy density deviation formula power faiture safe unit are connected three road inputs of central monitoring unit with the second output of C Entropy density deviation formula power faiture safe unit;
Described A Entropy density deviation formula power faiture safe unit, B Entropy density deviation formula power faiture safe unit is identical with C Entropy density deviation formula power faiture safe cellular construction, include a voltage transformer, a current transformer, first backward diode, second backward diode, 3rd backward diode, 4th backward diode, 5th backward diode, first igbt, second igbt, 3rd igbt, 4th igbt, 5th igbt, 6th igbt, 7th igbt, an inductance, first AC circuit breaker, second AC circuit breaker, first gate pole controlled thyristor, second gate pole controlled thyristor, 3rd gate pole controlled thyristor, 4th gate pole controlled thyristor, 5th gate pole controlled thyristor, 6th gate pole controlled thyristor, first energy consumption resistance, second energy consumption resistance and a lightning arrester, wherein,
One end of the first described AC circuit breaker connects the anode of the first gate pole controlled thyristor simultaneously, the negative electrode of the first backward diode, the anode of the second backward diode, the collector electrode of the first igbt and the emitter of the second igbt, the negative electrode of the first described gate pole controlled thyristor connects the negative electrode of the second gate pole controlled thyristor simultaneously, the negative electrode of the 3rd gate pole controlled thyristor, one end of inductance, the collector electrode of the 5th igbt, one end of voltage transformer, one end of lightning arrester, the emitter of the 6th igbt, the collector electrode of the 7th igbt and the negative electrode of the 5th backward diode, the anode of the second described gate pole controlled thyristor connects the anode of the first backward diode and the emitter of the first igbt simultaneously, the negative electrode of the second described backward diode connects the collector electrode of the second igbt and the negative electrode of the 4th gate pole controlled thyristor simultaneously, the anode of the 4th gate pole controlled thyristor connects one end of current transformer simultaneously, the anode of the 5th gate pole controlled thyristor and the anode of the 6th gate pole controlled thyristor, the other end of described current transformer connects the other end of inductance simultaneously, the emitter of the 5th igbt, the other end of voltage transformer, the other end of lightning arrester and one end of the first energy consumption resistance, the other end of the first energy consumption resistance connects the collector electrode of the 6th igbt, the emitter of the 7th described igbt connects the anode of the 5th backward diode and one end of the second energy consumption resistance, the other end ground connection of the second energy consumption resistance simultaneously, the negative electrode of the 5th described gate pole controlled thyristor connects the collector electrode of the 4th igbt and the negative electrode of the 4th backward diode simultaneously, and the emitter of the 4th igbt connects the negative electrode of the anode of the 4th backward diode, the negative electrode of the 3rd backward diode, the collector electrode of the 3rd igbt, one end of the second AC circuit breaker and the 6th gate pole controlled thyristor simultaneously, the anode of the 3rd described backward diode connects the emitter of the 3rd igbt and the anode of the 3rd gate pole controlled thyristor simultaneously.
The other end of the first described AC circuit breaker is as the first input end of distributed power source error protection unit;
The other end of the second described AC circuit breaker is as the first output of distributed power source error protection unit;
The base stage of the first described igbt, the base stage of the second igbt, the base stage of the 3rd igbt, the base stage of the 4th igbt, the base stage of the 5th igbt, the base stage of the 6th igbt, the base stage of the 7th igbt, the gate pole of the first gate pole controlled thyristor, the gate pole of the second gate pole controlled thyristor, the gate pole of the 3rd gate pole controlled thyristor, the gate pole of the 4th gate pole controlled thyristor, the gate pole of the 5th gate pole controlled thyristor, the gate pole of the 6th gate pole controlled thyristor, the control end of the first AC circuit breaker and the control end of the second AC circuit breaker are as the second input of distributed power source error protection unit,
Described voltage transformer output summation current transformer output is as the second output of distributed power source error protection unit.
Described distributed power source error protection unit is A Entropy density deviation formula power faiture safe unit or B Entropy density deviation formula power faiture safe unit or C Entropy density deviation formula power faiture safe unit.
Advantage beneficial effect of the present utility model is:
A kind of distributed power source failure protecting device being applicable to multi-source electrical network of the utility model, compared with traditional short-circuit protection (Crowbar Protection) technology, amplitude of short circuit during first the utility model utilizes the inductance in fault secure circuit to come fault current limiting moment of fault current rising rate of change and fault traversing, utilize inductance to the inhibitory action of curent change during suppression electric current instantaneous peak value, respond without the need to control system, instantaneous automatic input, can run with under system fault condition normal, reduce fault current to the impact of equipment; Secondly, the input shunting energy consumption resistor and current-limiting inductance between age at failure realizes distributed power source when maintaining former running status and being constant, does not cut continuous service under machine state, without the need to locking converter equipment, ensure that the realization of low voltage crossing technology; The exclusive control system hardware configuration of last the utility model can avoid the response time delay of proterctive equipment switching, can suppress timely and effectively, avoid it to cause damage to source equipment to amplitude of short circuit during fault current instantaneous peak value and fault traversing.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the device overall structure schematic diagram of access double feed wind power generator of the present utility model;
Fig. 3 is A Entropy density deviation formula power failure protection device circuit theory diagrams in the utility model;
Fig. 4 is the circuit theory diagrams of signal conditioning circuit in the utility model;
Fig. 5 is central monitoring unit circuit theory diagrams in the utility model;
Fig. 6 is discharge circuit modular circuit schematic diagram in the utility model;
Fig. 7 is that the utility model suppresses stage circuit schematic diagram at fault current peak value;
Fig. 8 is that the utility model is at pattern switch step conversion circuit schematic diagram;
Fig. 9 is that the utility model is at fault traversing stage circuit schematic diagram;
To be the utility model to release energy circuit diagram cutting inductance under machine state Figure 10;
Figure 11 is that the utility model installs distributed power source failure protecting device three-phase current effective value curve chart;
Figure 12 is three-phase current effective value curve chart after the utility model installation distributed power source failure protecting device.
Embodiment
Below in conjunction with accompanying drawing, a kind of embodiment of the utility model is described further.
Be applicable to a distributed power source failure protecting device for multi-source electrical network as shown in Figure 1, comprise central monitoring unit, A Entropy density deviation formula power faiture safe unit, B Entropy density deviation formula power faiture safe unit, C Entropy density deviation formula power faiture safe unit and converter; As shown in Figure 2, in the utility model embodiment, using double feed wind power generator as distributed power source, converter adopts model to be ZX18-0.97/4V; Central monitoring unit adopts TMS320F28335 model.
The first input end of described A Entropy density deviation formula power faiture safe unit, the first input end of B Entropy density deviation formula power faiture safe unit and the first input end of C Entropy density deviation formula power faiture safe unit are all connected the output of distributed power source; the i.e. output of double feed wind power generator; first output of A Entropy density deviation formula power faiture safe unit, the first output of B Entropy density deviation formula power faiture safe unit and the first output of C Entropy density deviation formula power faiture safe unit are all connected three road inputs of converter, the output access electrical network of converter.Second input of described A Entropy density deviation formula power faiture safe unit, the second input of B Entropy density deviation formula power faiture safe unit are connected three road outputs of central monitoring unit with the second input of C Entropy density deviation formula power faiture safe unit, the second output of A Entropy density deviation formula power faiture safe unit, the second output of B Entropy density deviation formula power faiture safe unit are connected three road inputs of central monitoring unit with the second output of C Entropy density deviation formula power faiture safe unit.
In the utility model embodiment; A Entropy density deviation formula power faiture safe unit, B Entropy density deviation formula power faiture safe unit are identical with C Entropy density deviation formula power faiture safe cellular construction; for A Entropy density deviation formula power faiture safe unit in the present embodiment, as shown in Figure 3, comprise voltage transformer pt
1, Current Transmit
1, the first backward diode VD
1, the second backward diode VD
2, the 3rd backward diode VD
3, the 4th backward diode VD
4, the 5th backward diode VD
5, the first igbt T
1, the second igbt T
2, the 3rd igbt T
3, the 4th igbt T
4, the 5th igbt T
5, the 6th igbt T
6, the 7th igbt T
7, inductance L
1, the first AC circuit breaker K
1, the second AC circuit breaker K
2, the first gate pole controlled thyristor V
1, the second gate pole controlled thyristor V
2, the 3rd gate pole controlled thyristor V
3, the 4th gate pole controlled thyristor V
4, the 5th gate pole controlled thyristor V
5, the 6th gate pole controlled thyristor V
6, the first energy consumption resistance R
1, the second energy consumption resistance R
2with a lightning arrester Z
no
1, wherein, voltage transformer adopts JDZ1-1 model; Current Transmit
1adopt KHCT911L-600A/5A model; Lightning arrester adopts HY1.5W-0.5/2.6 model;
As shown in Figure 3, in the utility model embodiment, the first AC circuit breaker K
1one end connect the first gate pole controlled thyristor V simultaneously
1anode, the first backward diode VD
1negative electrode, the second backward diode VD
2anode, the first igbt T
1collector electrode and the second igbt T
2emitter, the first described gate pole controlled thyristor V
1negative electrode connect the second gate pole controlled thyristor V simultaneously
2negative electrode, the 3rd gate pole controlled thyristor V
3negative electrode, inductance L
1one end, the 5th igbt T
5collector electrode, voltage transformer pt
1one end, lightning arrester Z
no
1one end, the 6th igbt T
6emitter, the 7th igbt T
7collector electrode and the 5th backward diode VD
5negative electrode, the second described gate pole controlled thyristor V
2anode connect the first backward diode VD simultaneously
1anode and the first igbt T
1emitter; The second described backward diode VD
2negative electrode connect the second igbt T simultaneously
2collector electrode and the 4th gate pole controlled thyristor V
4negative electrode, the 4th gate pole controlled thyristor V
4anode connect Current Transmit simultaneously
1one end, the 5th gate pole controlled thyristor V
5anode and the 6th gate pole controlled thyristor V
6anode, described Current Transmit
1the other end connect inductance L simultaneously
1the other end, the 5th igbt T
5emitter, voltage transformer pt
1the other end, lightning arrester Z
no
1the other end and the first energy consumption resistance R
1one end, the first energy consumption resistance R
1the other end connect the 6th igbt T
6collector electrode; The 7th described igbt T
7emitter connect the 5th backward diode VD simultaneously
5anode and the second energy consumption resistance R
2one end, the second energy consumption resistance R
2other end ground connection; The 5th described gate pole controlled thyristor V
5negative electrode connect the 4th igbt T simultaneously
4collector electrode and the 4th backward diode VD
4negative electrode, the 4th igbt T
4emitter connect the 4th backward diode VD simultaneously
4anode, the 3rd backward diode VD
3negative electrode, the 3rd igbt T
3collector electrode, the second AC circuit breaker K
2one end and the 6th gate pole controlled thyristor V
6negative electrode; The 3rd described backward diode VD
3anode connect the 3rd igbt T simultaneously
3emitter and the 3rd gate pole controlled thyristor V
3anode.
In the utility model embodiment, the first AC circuit breaker K
1the other end as the first input end of distributed power source error protection unit; The second described AC circuit breaker K
2the other end as the first output of distributed power source error protection unit; The first described igbt T
1base stage, the second igbt T
2base stage, the 3rd igbt T
3base stage, the 4th igbt T
4base stage, the 5th igbt T
5base stage, the 6th igbt T
6base stage, the 7th igbt T
7base stage, the first gate pole controlled thyristor V
1gate pole, the second gate pole controlled thyristor V
2gate pole, the 3rd gate pole controlled thyristor V
3gate pole, the 4th gate pole controlled thyristor V
4gate pole, the 5th gate pole controlled thyristor V
5gate pole and the 6th gate pole controlled thyristor V
6gate pole, the first AC circuit breaker K
1control end and the second AC circuit breaker K
2control end is as the second input of distributed power source error protection unit; Described voltage transformer pt
1output summation current transformer CT
1output is as the second output of distributed power source error protection unit; Described distributed power source error protection unit is A Entropy density deviation formula power faiture safe unit or B Entropy density deviation formula power faiture safe unit or C Entropy density deviation formula power faiture safe unit.
Fig. 4 is signal conditioning circuit schematic diagram, in the utility model embodiment, comprise six signal conditioning circuits, and structure is identical, and the input U/I of six signal conditioning circuits connects the output of three voltage transformers and the output of three current transformers respectively; As shown in Figure 5, six signal conditioning circuits connect TMS320F28335 model dsp chip by ADS8364 type data acquisition chip, and wherein, the output+OUT of signal conditioning circuit ,-OUT, IN hold+IN ,-IN, the REF end of connection data acquisition chip successively; Data acquisition chip
cLK, D0 ~ D15 accesses TMS320F28335 model dsp chip respectively
mCLKX, D0 ~ D15; GPIO1 ~ 10 of dsp chip, 16 ~ 20,41 ~ 55,56 ~ 62,45 ports of 80 ~ 82 connect 13 pins of 45 M57962L chips respectively; as shown in Figure 6; every 15 M57962L chips correspondence connects a distributed power source error protection unit (A Entropy density deviation formula power faiture safe unit or B Entropy density deviation formula power faiture safe unit or C Entropy density deviation formula power faiture safe unit); in each distributed power source error protection unit, and connect the first igbt T respectively by 5 pins connections of 7 M57962L chips
1base stage, the second igbt T
2base stage, the 3rd igbt T
3base stage, the 4th igbt T
4base stage, the 5th igbt T
5base stage, the 6th igbt T
6base stage, the 7th igbt T
7base stage; Connected by 5 pins of 6 M57962L chips and connect the first gate pole controlled thyristor V respectively
1gate pole, the second gate pole controlled thyristor V
2gate pole, the 3rd gate pole controlled thyristor V
3gate pole, the 4th gate pole controlled thyristor V
4gate pole, the 5th gate pole controlled thyristor V
5gate pole and the 6th gate pole controlled thyristor V
6gate pole; The first AC circuit breaker K is respectively connected by 5 pins of 2 M57962L chips
1control end and the second AC circuit breaker K
2control end.
In the utility model embodiment, as shown in Figure 7, when judging to break down, in distributed power source error protection unit, inductance L is passed through
1electric current can there is instantaneous change, now, inductance L
1the instantaneous peak value of electric current when inverse electromotive force suppresses fault to occur, when passing through inductance L
1electric current when tending towards stability, Current Transmit 1 monitoring current reaches 1.5 times simultaneously, and now first central monitoring unit sends a control signal in the distributed power source error protection unit broken down, and controls its 5th igbt T
5, the 6th igbt T
6with the 7th igbt T
7, make its conducting, the second energy consumption resistance R
2=U
a/ I
a(I
arepresent circuit monophase current, U
arepresent circuit single-phase voltage) i.e. approximation system impedance, now, by the 7th igbt T
7shunting when pattern switches is carried out, by the 5th igbt T to fault current
5with the 7th igbt T
7loop is by electric current I in figure
1be divided into electric current I
2and electric current I
3, now distributed power source error protection unit Dietary behavior switching state, as Fig. 8; This state is transition state, can not continuous service, (object makes under not cutting machine uninterrupted operation state inductance suppresses short circuit current by DC line incoming transport circuit); Then central monitoring unit sends a control signal in the distributed power source error protection unit broken down, and gives gate pole controlled thyristor V successively
1, V
6triggering signal makes its conducting state, to gate pole controlled thyristor V
2, V
3, V
4, V
5triggering signal makes its off state, to igbt T
1, T
2, T
3, T
4triggering signal makes its off state, to igbt T
5, T
7triggering signal makes its off state, finally, completes and to connect line attachment in the inductance L 1 of not cutting in machine situation, suppress short circuit current, lightning arrester Z in this process
no
1be in access state, the switching overvoltage preventing from fault overvoltage and inductance from switching causing is as Fig. 9 always;
In the utility model embodiment, when complete cut machine time, form circuit structure as shown in Figure 10, inductance L
1with the 6th igbt T
6form loop, and by the first energy consumption resistance R
1release energy, realize the excision of distributed power source and the object of distributed power source failure protecting device internal energy release.
As is illustrated by figs. 11 and 12, curve as can be seen from figure, broke down at 2 seconds to 3 seconds period, and after installing, fault current obtains obvious suppression, and fault appearance in 2 seconds with when within 3 seconds, getting rid of, fault current instantaneous peak value is also significantly suppressed effect.
Claims (4)
1. one kind is applicable to the distributed power source failure protecting device of multi-source electrical network; it is characterized in that; this device comprises central monitoring unit, A Entropy density deviation formula power faiture safe unit, B Entropy density deviation formula power faiture safe unit, C Entropy density deviation formula power faiture safe unit and converter, wherein
The first input end of described A Entropy density deviation formula power faiture safe unit, the first input end of B Entropy density deviation formula power faiture safe unit and the first input end of C Entropy density deviation formula power faiture safe unit are all connected the output of distributed power source, first output of A Entropy density deviation formula power faiture safe unit, the first output of B Entropy density deviation formula power faiture safe unit and the first output of C Entropy density deviation formula power faiture safe unit are all connected three road inputs of converter, the output access electrical network of converter;
Second input of described A Entropy density deviation formula power faiture safe unit, the second input of B Entropy density deviation formula power faiture safe unit are connected three road outputs of central monitoring unit with the second input of C Entropy density deviation formula power faiture safe unit, the second output of A Entropy density deviation formula power faiture safe unit, the second output of B Entropy density deviation formula power faiture safe unit are connected three road inputs of central monitoring unit with the second output of C Entropy density deviation formula power faiture safe unit.
2. a kind of distributed power source failure protecting device being applicable to multi-source electrical network according to claim 1, is characterized in that, described A Entropy density deviation formula power faiture safe unit, B Entropy density deviation formula power faiture safe unit is identical with C Entropy density deviation formula power faiture safe cellular construction, includes a voltage transformer, a current transformer, first backward diode, second backward diode, 3rd backward diode, 4th backward diode, 5th backward diode, first igbt, second igbt, 3rd igbt, 4th igbt, 5th igbt, 6th igbt, 7th igbt, an inductance, first AC circuit breaker, second AC circuit breaker, first gate pole controlled thyristor, second gate pole controlled thyristor, 3rd gate pole controlled thyristor, 4th gate pole controlled thyristor, 5th gate pole controlled thyristor, 6th gate pole controlled thyristor, first energy consumption resistance, second energy consumption resistance and a lightning arrester, wherein,
One end of the first described AC circuit breaker connects the anode of the first gate pole controlled thyristor simultaneously, the negative electrode of the first backward diode, the anode of the second backward diode, the collector electrode of the first igbt and the emitter of the second igbt, the negative electrode of the first described gate pole controlled thyristor connects the negative electrode of the second gate pole controlled thyristor simultaneously, the negative electrode of the 3rd gate pole controlled thyristor, one end of inductance, the collector electrode of the 5th igbt, one end of voltage transformer, one end of lightning arrester, the emitter of the 6th igbt, the collector electrode of the 7th igbt and the negative electrode of the 5th backward diode, the anode of the second described gate pole controlled thyristor connects the anode of the first backward diode and the emitter of the first igbt simultaneously, the negative electrode of the second described backward diode connects the collector electrode of the second igbt and the negative electrode of the 4th gate pole controlled thyristor simultaneously, the anode of the 4th gate pole controlled thyristor connects one end of current transformer simultaneously, the anode of the 5th gate pole controlled thyristor and the anode of the 6th gate pole controlled thyristor, the other end of described current transformer connects the other end of inductance simultaneously, the emitter of the 5th igbt, the other end of voltage transformer, the other end of lightning arrester and one end of the first energy consumption resistance, the other end of the first energy consumption resistance connects the collector electrode of the 6th igbt, the emitter of the 7th described igbt connects the anode of the 5th backward diode and one end of the second energy consumption resistance, the other end ground connection of the second energy consumption resistance simultaneously, the negative electrode of the 5th described gate pole controlled thyristor connects the collector electrode of the 4th igbt and the negative electrode of the 4th backward diode simultaneously, and the emitter of the 4th igbt connects the negative electrode of the anode of the 4th backward diode, the negative electrode of the 3rd backward diode, the collector electrode of the 3rd igbt, one end of the second AC circuit breaker and the 6th gate pole controlled thyristor simultaneously, the anode of the 3rd described backward diode connects the emitter of the 3rd igbt and the anode of the 3rd gate pole controlled thyristor simultaneously.
3. a kind of distributed power source failure protecting device being applicable to multi-source electrical network according to claim 2, is characterized in that,
The other end of the first described AC circuit breaker is as the first input end of distributed power source error protection unit;
The other end of the second described AC circuit breaker is as the first output of distributed power source error protection unit;
The base stage of the first described igbt, the base stage of the second igbt, the base stage of the 3rd igbt, the base stage of the 4th igbt, the base stage of the 5th igbt, the base stage of the 6th igbt, the base stage of the 7th igbt, the gate pole of the first gate pole controlled thyristor, the gate pole of the second gate pole controlled thyristor, the gate pole of the 3rd gate pole controlled thyristor, the gate pole of the 4th gate pole controlled thyristor, the gate pole of the 5th gate pole controlled thyristor, the gate pole of the 6th gate pole controlled thyristor, the control end of the first AC circuit breaker and the control end of the second AC circuit breaker are as the second input of distributed power source error protection unit,
Described voltage transformer output summation current transformer output is as the second output of distributed power source error protection unit.
4. a kind of distributed power source failure protecting device being applicable to multi-source electrical network according to claim 3; it is characterized in that, described distributed power source error protection unit is A Entropy density deviation formula power faiture safe unit or B Entropy density deviation formula power faiture safe unit or C Entropy density deviation formula power faiture safe unit.
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| CN201420387934.0U CN204118716U (en) | 2014-07-14 | 2014-07-14 | A kind of distributed power source failure protecting device being applicable to multi-source electrical network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092202A (en) * | 2014-07-14 | 2014-10-08 | 国家电网公司 | Distributed power failure protection device and method suitable for multi-source power grid |
| CN113300339A (en) * | 2021-05-28 | 2021-08-24 | 国网冀北综合能源服务有限公司 | Device and method for rapidly recovering direct-current short-circuit fault of AC/DC converter |
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2014
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092202A (en) * | 2014-07-14 | 2014-10-08 | 国家电网公司 | Distributed power failure protection device and method suitable for multi-source power grid |
| CN104092202B (en) * | 2014-07-14 | 2017-09-05 | 国家电网公司 | A kind of distributed power source failure protecting device and method suitable for multi-source power network |
| CN113300339A (en) * | 2021-05-28 | 2021-08-24 | 国网冀北综合能源服务有限公司 | Device and method for rapidly recovering direct-current short-circuit fault of AC/DC converter |
| CN113300339B (en) * | 2021-05-28 | 2024-02-02 | 国网冀北综合能源服务有限公司 | Device and method for quickly recovering direct current short circuit fault of AC/DC converter |
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