CN103532166A - Distributed photovoltaic intelligent grid connection box - Google Patents
Distributed photovoltaic intelligent grid connection box Download PDFInfo
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- CN103532166A CN103532166A CN201310423544.4A CN201310423544A CN103532166A CN 103532166 A CN103532166 A CN 103532166A CN 201310423544 A CN201310423544 A CN 201310423544A CN 103532166 A CN103532166 A CN 103532166A
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Abstract
The invention relates to a distributed photovoltaic intelligent grid connection box. The distributed photovoltaic intelligent grid connection box comprises an operating mechanism for driving closing and opening and a central control unit capable of receiving current information of a current detection device, performing processing and logic analysis on the current information and outputting a control instruction to control the opening and the closing of the operating mechanism after judging that the current fails, wherein the central control unit performs sampling and analytical judgment by using a conventional sampling and dense sampling combined mode; the operating mechanism performs opening driving action through a repulsion coil, a demagnetizing coil, an opening spring and an opening coil; thus, the purposes of quick action, quick outlet protection and quick fault cut-off are realized from software and hardware, the reliability of a micro-grid in the grid connection or isolated network operation state and the stable transition between grid connection/isolated network modes can be powerfully guaranteed, and the equipment cost is obviously reduced on the premise of meeting the special usage requirements of the micro-grid.
Description
Technical field
The present invention relates to a kind of distributed photovoltaic intelligence net cage, be mainly used in photo-voltaic power supply to access large electrical network, and realize and off-grid intellectuality, also can be used for micro-electrical network or other similar systems with the connection between large electrical network.
Background technology
Development along with national economy, electricity needs increases rapidly, and electrical network scale constantly expands, but the drawback of ultra-large electric power system also highlights day by day, cost is high, operation difficulty is large, is difficult to adapt to safety and reliability requirement and the diversified power demands that user is more and more higher.Photovoltaic distributed power generation is advocated generating nearby, grid-connected nearby, conversion nearby, the principle of using nearby, have pollution less, the advantage such as reliability is high, efficiency of energy utilization is high, infield is flexible, be a kind of novel, tool generating with broad prospects for development and comprehensive utilization of energy mode, obtained fast development.In China, distributed photovoltaic has obtained support and the support of National Energy Board, state net policy, is defined as needing the industry of " greatly developing ".
Distributed photovoltaic is grid-connected is the mainstream development pattern of photovoltaic generation, but simultaneously, distributed photovoltaic is grid-connected also can be brought and have a strong impact on to public large electrical network:
(1) changed public large electric network fault feature; affect large electric grid relay protection: when large electrical network is connected to distributed photovoltaic power; can change the original direction of tide of large electrical network; change the original fault signature of large electrical network; can cause like this malfunction or the inefficacy of large electric grid relay protection; if can not eliminate this impact, just need to drop into substantial contribution and change existing large grid relay protective apparatus, increased grid-connected difficulty and improvement cost.
(2) produce unexpected island effect, when large electrical network has a power failure because of fault or maintenance, distributed photovoltaic is still to the load power supply on dead line, and the harm person, device security affect the O&M safety of power distribution network.
Above problem causes the grid-connected development obstacles of distributed photovoltaic power generation, affects the grid-connected development prospect of distributed photovoltaic power generation.
Summary of the invention
For addressing the above problem, the invention provides a kind of distributed photovoltaic intelligence net cage, adopt this and net cage can fast detecting failure, fast isolation, eliminate the impact of distributed photovoltaic system access on public large electrical network, and improve and off-grid safety and reliability.
The technical solution adopted in the present invention is:
A kind of distributed photovoltaic intelligence net cage, it adopts central control unit to for driving the operating mechanism of on/off switch to control, described center-control unit obtains power network current signal by current sensing means, and power network current signal is analyzed, when judgement electrical network occurs answering the fault of separating brake, control described operating mechanism and carry out separating brake, described central control unit is processed current data and the mode of logic analysis is: ac cycle is determined to several routine sampling points, described several routine sampling points can uniformly-spaced be divided by the time, according to definite routine sampling point, carry out lasting routine sampling, after new sampled data of every acquisition, the sampled data of the co-located routine sampling point in a same ac cycle of this sampled data is compared, as both differences surpass established standards, at this routine sampling point, to (containing the sampling of neighbouring sample point thereafter) between adjacent routine sampling point thereafter, adopt intensive sampling mode to carry out intensive sampling, obtain intensive sampling data, according to the routine sampling data of previous ac cycle, calculate the AC wave shape (function of time) that obtains previous ac cycle simultaneously, described intensive sampling for inserting the sample mode of one or more sampled points between adjacent two routine sampling points again, each sampled data with intensive sampling interval (containing the routine sampling point at these two ends, interval) is calculated the AC wave shape (function of time) in this intensive sampling interval, calculate the integrated value of current squaring to the time under this interval, calculate the integrated value of corresponding interval current squaring of previous cycle to the time, calculate the difference of two integrated values, and the absolute value of this difference pre-set limit corresponding with this interval compared, while meeting or exceeding pre-set limit, judge that the fault of separating brake appears answering in electrical network, otherwise be judged as the fault that does not occur needing separating brake.
The routine sampling point quantity of described each ac cycle can be 12,24 or 36 conventionally, described intensive sampling only carries out in the interval of two adjacent routine sampling points, the intensive sampling point quantity of inserting between adjacent two sampled points is 1,2 or 3, for example, generally insert 2 and just can meet control requirement.
Described operating mechanism is preferably rapid permanent-magnet operating mechanism.
Preferably, described rapid permanent-magnet operating mechanism output shaft, the upper end of described output shaft connects described metal repulsion plate, on described output shaft, be fixedly connected with moving unshakable in one's determination, below described metal repulsion plate, be provided with the repulsion coil supporting with it, the below of described repulsion coil is respectively equipped with open position baffle plate and closing position baffle plate, described moving iron core is between described open position baffle plate and closing position baffle plate, the outside of described moving iron core is respectively equipped with the anti-magnetized coil supporting with described moving iron core, permanent magnet and closing coil, the top of described output shaft is also provided with tripping spring, described tripping spring upper end and described metal repulsion plate pressure contact, lower end and described open position baffle plate pressure contact.
Conventionally, described central processing unit unit can be connected with the current sensing means for detection of line current, described central control unit is provided with for receiving the detection signal input interface circuit of described current information, and the output of described current sensing means is connected to the input of described detection signal input interface circuit.
Described detection signal input interface circuit can be provided with for described current information is carried out to analog-to-digital high-speed & resolution ADC.
Described current sensing means can comprise A, B, C threephase current transformer, also can comprise A, B, C threephase current transformer and zero sequence current mutual inductor.
Described central control unit can also be provided with can and the digital telecommunication circuit of two-way communication between main frame for outside energy management, described digital telecommunication circuit is for uploading the various state informations of described high-speed switch and receiving the various dispatch commands from described main frame.
Described central control unit can also be provided with the remote signal input interface circuit that can receive remote signal.
Provided by the invention and net cage can be provided with for power taking from circuit and convert thereof into described remote signal input interface circuit and voltage or the current transformation unit of the electricity consumption of repulsion coil power supply circuit, for example current transformer.
The invention has the beneficial effects as follows:
Owing to having adopted a kind of new fault current quick calculation method, the fault current signal procedure judgement processing time is shortened in 2.5ms, and by with the coordinating of specific operating mechanism, thereby whole group of disconnection shortened in 6ms operate time, the rapidity that has significantly improved the quick-break action of high-speed switch, has effectively guaranteed the smooth transition of micro-electrical network between grid-connected/lonely net pattern;
Due to the repulsive force mechanism that adopts repulsion coil and metal repulsion plate to form, and mode that can be by precharge capacitor discharge is for repulsion coil provides large electric current, has improved thus the rapidity of separating brake action;
Owing to being provided with and moving supporting anti-magnetized coil, permanent magnet and closing coil unshakable in one's determination, by permanent magnet and moving interaction unshakable in one's determination, can remain on separating brake or closing position moving iron core, by anti-magnetized coil, can make to offset permanent magnet to moving fixation unshakable in one's determination at separating brake or feed motion, actuating force while further having strengthened separating brake by tripping spring, improve thus the reliability of described driving mechanism, improved the speed of separating brake action.
Due to be provided with can and digital telecommunication circuit and the corresponding digital communication interface of two-way communication between main frame for outside energy management, can realize described distributed photovoltaic intelligence net cage various state informations upload and from the reception of the various dispatch commands of described main frame, be conducive to the energy-optimised management of the system that realizes, consistent with the core design theory of intelligent grid, to new forms of energy, promote, save energy and reduce the cost significant.
Accompanying drawing explanation
Fig. 1 is electrical principle block diagram of the present invention;
Fig. 2 is the schematic diagram of repulsive force mechanism of the present invention;
Fig. 3 is course of work schematic diagram of the present invention;
Fig. 4 is the structural representation of the operating mechanism that the present invention relates to.
Embodiment
Referring to Fig. 1-4; the invention provides a kind of distributed photovoltaic intelligence net cage; belong to a kind of micro-electrical network PCC Intelligent complete equipment; can be applicable to micro-electrical network and main electrical network junction; become the key equipment that micro-electrical network and public large electrical network connect; be the Intelligent integral equipment that micro-electric network protection observing and controlling and high speed circuit breaker are combined, can after fault, excise fault fast, switch to lonely Running State.
As shown in Figure 1, the grid-connected case of described distributed photovoltaic intelligence comprises operating mechanism (being preferably rapid permanent-magnet operating mechanism) for driving on/off switch and current information that can received current checkout gear, this current information is processed and logic analysis export control command and control the central control unit that described operating mechanism divide-shut brake moves after judging current failure.
Described central control unit is processed current data and the mode of logic analysis is: ac cycle is determined to several routine sampling points, described several routine sampling points can uniformly-spaced be divided by the time, according to definite routine sampling point, carry out lasting routine sampling, after new sampled data of every acquisition, the sampled data of the co-located routine sampling point in a same ac cycle of this sampled data is compared, as both differences surpass established standards, at this routine sampling point, to (containing the sampling of neighbouring sample point thereafter) between adjacent routine sampling point thereafter, adopt intensive sampling mode to carry out intensive sampling, obtain intensive sampling data, according to the routine sampling data of previous ac cycle, calculate the AC wave shape (function of time of electric current) that obtains previous ac cycle simultaneously, described intensive sampling for inserting the sample mode of one or more sampled points between adjacent two routine sampling points again, each sampled data with intensive sampling interval (containing the routine sampling point at these two ends, interval) is calculated the AC wave shape (function of time of electric current) in this intensive sampling interval, calculate the integrated value of current squaring to the time under this interval, calculate the integrated value of corresponding interval current squaring of previous cycle to the time, calculate the difference of two integrated values, and the absolute value of this difference pre-set limit corresponding with this interval compared, while meeting or exceeding pre-set limit, judge that the fault of separating brake appears answering in electrical network, otherwise be judged as the fault that does not occur needing separating brake.
For simplifying, calculate, also can adopt the mode of summation to substitute above-mentioned integral and calculating, that is: interval for intensive sampling, with square being multiplied by corresponding sampled point and time difference between sampled point to each product summation above of each sampled data of sealing sampling interval (the routine sampling point of computational back-end but do not calculate the routine sampling point of front end), the summing value of acquisition to each product, corresponding interval to previous ac cycle with this intensive sampling interval, according to the AC wave shape of calculating, obtain each current data (current data that comprises this rear end, interval end points with interval each intensive sampling point correspondence position of intensive sampling, the current data that does not comprise front end end points), with each current data square be multiplied by and this data point and previous data point between time difference, the summing value of acquisition to each product, calculate the difference of two summing values, and the absolute value of this difference pre-set limit corresponding with this interval compared, while meeting or exceeding pre-set limit, judge that the fault of separating brake appears answering in electrical network, otherwise be judged as the fault that does not occur needing separating brake.
Described current waveform can calculate according to existing account form or other suitable account forms of any suitable.For being adapted to more accurately the characteristic of corresponding electrical network, also can, using for reference on the basis of prior art, by certain experimental data, set up and verify corresponding Mathematical Modeling.Calculating for current waveform, can after sampled data of every acquisition, calculate, also the co-located sampled data newly obtaining in a same ac cycle of sampled data can compared to both differences of discovery over calculating current waveform one-period or the little time period before being positioned at this sampled point after established standards again), to reduce the amount of calculation under regular situation
Conventionally, the routine sampling point quantity of each ac cycle can be 24 or 36, described intensive sampling only carries out in the interval of two adjacent routine sampling points, the intensive sampling point quantity of inserting between adjacent two sampled points is 1,2 or 3, several routine sampling points, thus, can reduce significantly and make the time of analyzing judgement, and can guarantee reliability and reasonability.
Due to the energy correlation of current squaring to the integration of time or product and electrical network transmission; in coordinate diagram corresponding to the area under this section of current waveform; therefore adopt this parameter can meet better the protection requirement of network system as criterion; and adopt two integrated values or summing value difference as criterion; the fluctuation up and down that accidentalia can be caused balances out; particularly, in this extremely short intensive sampling interval, adopt this up and down technological means that fluctuation is offset significant for avoiding mistake separating brake.In addition; consider the wave characteristics of alternating current; determine routine sampling point rear (sampling point position in one-period); for the interval between each neighbouring sample point, all should set in advance respectively the limit value for fault judgement; each limit value can adopt prior art to require to determine according to electrical network characteristic and protection, also can by experiment/simulated experiment determine or checking.The requirement that can control according to power supply network, select each intensive sampling data and the difference between the current data under relevant position of being calculated by the current waveform of previous cycle/previous time period and or absolute difference and as criterion, or adopt simultaneously difference and and absolute difference and two parameters comprehensively judge.When adopt difference and time, in the fluctuation of the upper and lower both direction of supply waveform, will cancel out each other, and employing absolute difference and time, can not make the variation of upper and lower two directions cancel out each other, be adapted to thus stricter requirement.Because the time interval between sampled point equates, described difference and or absolute difference and be in fact equivalent in this interval poor or each several part difference in areas (absolute value) sum of the gross area between two waveforms.
Above-mentioned algorithm is mainly used in the quick fast tripping protection of short circuit current, during other protection calculation fault currents, can adopt conventional Fourier's computational methods or its mutation.
The number of the sampled data that can will calculate according to the requirement adjustment to accuracy and time (the sampled point number in one-period), number is more, and sampled point is just more, and accuracy is relatively higher.
As shown in Figure 2, described rapid permanent-magnet operating mechanism can comprise fixing repulsion coil 1 and be subject to the metal repulsion plate 2 of described repulsion coil magnetic field effect, described metal repulsion plate can adopt repulsion copper dish, and described metal repulsion plate is fixedly attached to for driving the operating mechanism output shaft of arc-control device action.On the current supply circuit of described repulsion coil, be in series with to the precharge capacitor C 4 of described repulsion coil discharge and the on-off controller K3 that controls this loop current switching.When on-off controller 3 makes this loop closed, precharge electric capacity 4 is to 1 electric discharge of repulsion coil, and produce larger pulse current, and now repulsion copper dish 2 moves upward because of the effect that inductive loop is subject to electromagnetic push F, thus the operating mechanism output shaft that promotes described operating mechanism moves upward.Described precharge electric capacity 4 is also connected on a charging circuit, and before upper once electric discharge, described charging circuit can be to described precharge capacitor charging.
Described repulsion coil and metal repulsion plate form repulsive force mechanism, and described repulsive force mechanism is the switch operation mechanism that utilizes eddy current repulsion principle to make, and can drive load quick acting at short notice, therefore can realize quick acting switching-off.Through prototype test, obtained satisfied effect, there is action fast, the feature that the reaction time is short, the reaction time is in 1-3ms left and right, far below the permanent-magnet manipulating mechanism of similar function.
Described repulsive force mechanism is compared pull operation mechanism or the permanent magnet mechanism of current power distribution network disconnect, has significantly shortened opening time, can meet preferably the needs of micro-electrical network quick acting switching-off.
Described rapid permanent-magnet operating mechanism adopts permanent magnet mechanism realization to drive and closes a floodgate and the maintenance that divides, closes a floodgate, reduce overshoot and bounce-back, thereby guarantee the reliable combined floodgate of high-speed switch in quick acting switching-off.Generally, "on" position is the normality of described distributed photovoltaic intelligence net cage.
As shown in Figure 4, the upper end of the output shaft 6 of described rapid permanent-magnet operating mechanism connects described metal repulsion plate 2, lower end is for connection/driving switch or arc-control device, described output shaft middle part is fixedly connected with moving unshakable in one's determination, below described metal repulsion plate, be provided with the repulsion coil 1 supporting with it, the below of described repulsion coil is respectively equipped with open position baffle plate 11 and closing position baffle plate 7, described moving iron core is between described open position baffle plate and closing position baffle plate, the outside of described moving iron core is respectively equipped with the anti-magnetized coil 10 supporting with described moving iron core, permanent magnet 9 and closing coil 8, the top of described output shaft is also provided with tripping spring 5, described tripping spring upper end and described metal repulsion plate pressure contact, lower end and described open position baffle plate pressure contact, described moving iron core and anti-magnetized coil, permanent magnet and closing coil are outer can be provided with framework or the housing of its yoke effect simultaneously, to form complete magnetic circuit and play, cover and protective effect.
As shown in Figure 1,3, described distributed photovoltaic intelligence net cage can also comprise the current sensing means for detection of line current, as current sensor, current transformer etc., described central control unit is provided with for receiving the detection signal input interface circuit of described current information, and the output of described current sensing means is connected to the input of described detection signal input interface circuit.For the described current sensing means that is output as analog quantity; analog to digital converter should be set in described detection signal input interface circuit can computing and the digital information of processing described current information is converted to central control unit; described analog to digital converter preferably adopts high-speed & resolution ADC; correspondingly; described central control unit preferably adopt high-speed figure chip be core high speed signal treatment circuit to described current information process, logic analysis and judgement, further to shorten the protection outlet time.
Described current sensing means can comprise A, B, C threephase current transformer, or also can comprise A, B, C threephase current transformer and zero sequence current mutual inductor.Described current sensing means is generally used for detecting the electric current on the circuit at described high-speed switch place, for distributed photovoltaic intelligence of the present invention net cage, when it is arranged on the junction of micro-electrical network and large electrical network, described current sensing means can be arranged in the respective lines of large electrical network according to actual needs, described current sensing means passes to detection signal input interface circuit by detected current information in real time, through described detection signal input interface circuit, carry out analog-to-digital conversion, then according to aforesaid described processing and logic analysis step, calculate and the judgement of fault current, when the described detection electric current of judgement is fault current, through drive circuit, send corresponding separating brake control command, thereby control described repulsive force mechanism action separating brake.
In the technical scheme of above-mentioned any described distributed photovoltaic intelligence net cage, described central control unit be also preferably provided with can and the digital telecommunication circuit of two-way communication between main frame for outside energy management, correspondingly, described digital telecommunication circuit is provided with digital communication interface.Described digital telecommunication circuit can be used for uploading the various state informations of described distributed photovoltaic intelligence net cage and receiving the various dispatch commands from described main frame, thereby realize the energy-optimised management of whole system, the core design theory that meets especially intelligent grid, to new forms of energy promote, energy-saving and cost-reducing, to reduce carbon emission measurer significant.
Described central control unit can also be provided with the remote signal input interface circuit that can receive remote signal.Described remote signal input interface circuit can receiving remote remote signal; comprise and can control the command signal of operating mechanism action and protect the isoparametric new settings value of definite value etc., with this, realize Long-distance Control and the definite value adjustment to local distributed photovoltaic intelligence net cage.The core of described central control unit is signal processing circuit, can be used for aforesaid described processing and logic analysis, described remote signal input interface circuit is sent into remote signal described signal processing circuit after necessary processing, participates in the calculating of fault current and the generation of control command.
Described distributed photovoltaic intelligence net cage can also be provided with for power taking from circuit and convert thereof into described remote signal input interface circuit and voltage or the current transformation unit of the circuit electricity consumption such as repulsion coil power supply circuit, have solved the powerup issue that described distributed photovoltaic intelligence the inner electricity consumption of net cage require different circuit.During use, without other addressing corollary equipment, also simplified the installation of equipment.
The present invention is by adopting brand-new quick protection algorithm to carry out the calculating of fault current; and adopt rapid permanent-magnet operating mechanism to realize quick acting switching-off and reliable combined floodgate; quick acting, the quick object of protecting outlet, excising fast fault from soft and hardware two aspects, have been realized; both can be connected between micro-electrical network and large electrical network; realize the seamless switching between two nets; can be arranged on again on micro-electrical network internal wiring; failure removal while realizing the lonely network operation of micro-electrical network; visible, the present invention can guarantee the reliability of micro-electrical network under grid-connected or lonely Running State.
According to applicant's prototype experiment, the present invention can reach following technical indicator:
(1) Switch main body separating brake operate time < 2.5ms;
(2) fast tripping protection operate time < 6ms;
(3) there is micro-electric network protection function (lonely net protection) and GPF (General Protection False function (grid-connected protection).
In addition, it is low that the present invention also has cost, and volume is little, less energy consumption, control capacity is large, and reliability is high, be applicable to the advantages such as frequent operation, be specially adapted to exchange in 50HZ, voltage 400V and following three-phase four-wire system electrical network, can meet the needs of domestic market and some special regional harsh and unforgiving environments.
Claims (10)
1. distributed photovoltaic intelligence net cage, it adopts central control unit to for driving the operating mechanism of on/off switch to control, described center-control unit obtains power network current signal by current sensing means, and power network current signal is analyzed, when judgement electrical network occurs answering the fault of separating brake, control described operating mechanism and carry out separating brake, it is characterized in that described central control unit is processed current information and the mode of logic analysis is: described central control unit is processed current data and the mode of logic analysis is: ac cycle is determined to several routine sampling points, described several routine sampling points can uniformly-spaced be divided by the time, according to definite routine sampling point, carry out lasting routine sampling, after new sampled data of every acquisition, the sampled data of the co-located routine sampling point in a same ac cycle of this sampled data is compared, as both differences surpass established standards, at this routine sampling point, to (containing the sampling of neighbouring sample point thereafter) between adjacent routine sampling point thereafter, adopt intensive sampling mode to carry out intensive sampling, obtain intensive sampling data, according to the routine sampling data of previous ac cycle, calculate the AC wave shape (function of time) that obtains previous ac cycle simultaneously, described intensive sampling for inserting the sample mode of one or more sampled points between adjacent two routine sampling points again, each sampled data with intensive sampling interval (containing the routine sampling point at these two ends, interval) is calculated the AC wave shape (function of time) in this intensive sampling interval, calculate the integrated value of current squaring to the time under this interval, calculate the integrated value of corresponding interval current squaring of previous cycle to the time, calculate the difference of two integrated values, and the absolute value of this difference pre-set limit corresponding with this interval compared, while meeting or exceeding pre-set limit, judge that the fault of separating brake appears answering in electrical network, otherwise be judged as the fault that does not occur needing separating brake.
2. distributed photovoltaic as claimed in claim 1 intelligence net cage, the routine sampling point quantity that it is characterized in that described each ac cycle is 24 or 36, described intensive sampling only carries out in the interval of two adjacent routine sampling points, and the intensive sampling point quantity of inserting between adjacent two sampled points is 1,2 or 3.
3. distributed photovoltaic intelligence as claimed in claim 1 or 2 net cage, is characterized in that described operating mechanism is rapid permanent-magnet operating mechanism.
4. distributed photovoltaic as claimed in claim 3 intelligence net cage, it is characterized in that described rapid permanent-magnet operating mechanism comprises output shaft, the upper end of described output shaft connects described metal repulsion plate, on described output shaft, be fixedly connected with moving unshakable in one's determination, below described metal repulsion plate, be provided with the repulsion coil supporting with it, the below of described repulsion coil is respectively equipped with open position baffle plate and closing position baffle plate, described moving iron core is between described open position baffle plate and closing position baffle plate, the outside of described moving iron core is respectively equipped with the anti-magnetized coil supporting with described moving iron core, permanent magnet and closing coil, the top of described output shaft is also provided with tripping spring, described tripping spring upper end and described metal repulsion plate pressure contact, lower end and described open position baffle plate pressure contact.
5. distributed photovoltaic as claimed in claim 4 intelligence net cage, it is characterized in that described central processing unit unit is connected with the current sensing means for detection of line current, described central control unit is provided with for receiving the detection signal input interface circuit of described current information, and the output of described current sensing means is connected to the input of described detection signal input interface circuit.
6. distributed photovoltaic intelligence as claimed in claim 5 net cage, is characterized in that described detection signal input interface circuit is provided with for described current information is carried out to analog-to-digital high-speed & resolution ADC.
7. distributed photovoltaic intelligence as claimed in claim 6 net cage, is characterized in that described current sensing means comprises A, B, C threephase current transformer, or comprise A, B, C threephase current transformer and zero sequence current mutual inductor.
8. the distributed photovoltaic as described in arbitrary claim in claim 1-7 intelligence net cage, it is characterized in that described central control unit be also provided with can and the digital telecommunication circuit of two-way communication between main frame for outside energy management, described digital telecommunication circuit is for uploading the various state informations of described high-speed switch and receiving the various dispatch commands from described main frame.
9. distributed photovoltaic intelligence as claimed in claim 8 net cage, is characterized in that described central control unit is also provided with the remote signal input interface circuit that can receive remote signal.
10. distributed photovoltaic intelligence as claimed in claim 9 net cage, is characterized in that being also provided with for power taking from circuit and convert thereof into described remote signal input interface circuit and voltage or the current transformation unit of the electricity consumption of repulsion coil power supply circuit.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105098782A (en) * | 2014-12-24 | 2015-11-25 | 上海电气集团股份有限公司 | Intelligent micro-grid switching and protection device and system |
| CN113349129A (en) * | 2021-04-28 | 2021-09-07 | 天津大学 | Flexible assembled offshore photovoltaic power generation and aquaculture net cage comprehensive development platform |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201478216U (en) * | 2009-08-25 | 2010-05-19 | 北京四方华能电气设备有限公司 | Quick control mechanism of permanent-magnetic circuit breaker |
| CN201699428U (en) * | 2010-05-11 | 2011-01-05 | 艾默生网络能源有限公司 | Wind energy converter grid-connection cabinet |
| CN102545261A (en) * | 2012-01-16 | 2012-07-04 | 沈阳工程学院 | Micro-grid experiment system |
-
2013
- 2013-09-17 CN CN201310423544.4A patent/CN103532166B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201478216U (en) * | 2009-08-25 | 2010-05-19 | 北京四方华能电气设备有限公司 | Quick control mechanism of permanent-magnetic circuit breaker |
| CN201699428U (en) * | 2010-05-11 | 2011-01-05 | 艾默生网络能源有限公司 | Wind energy converter grid-connection cabinet |
| CN102545261A (en) * | 2012-01-16 | 2012-07-04 | 沈阳工程学院 | Micro-grid experiment system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105098782A (en) * | 2014-12-24 | 2015-11-25 | 上海电气集团股份有限公司 | Intelligent micro-grid switching and protection device and system |
| CN113349129A (en) * | 2021-04-28 | 2021-09-07 | 天津大学 | Flexible assembled offshore photovoltaic power generation and aquaculture net cage comprehensive development platform |
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