CN203660549U - Distributed photovoltaic intelligent grid connection box - Google Patents
Distributed photovoltaic intelligent grid connection box Download PDFInfo
- Publication number
- CN203660549U CN203660549U CN201320575538.6U CN201320575538U CN203660549U CN 203660549 U CN203660549 U CN 203660549U CN 201320575538 U CN201320575538 U CN 201320575538U CN 203660549 U CN203660549 U CN 203660549U
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- China
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- distributed photovoltaic
- coil
- operating mechanism
- output shaft
- net cage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The utility model relates to a distributed photovoltaic intelligent grid connection box. A circuit breaker, an operating mechanism of the circuit breaker, and a central processing unit used for controlling the motion of the operating mechanism are installed in a box body. The operating mechanism is a rapid permanent magnetic operating mechanism which comprises an output shaft. An upper end of the output shaft is connected with a metal repulsive force plate of a repulsive force mechanism. An opening position baffle plate and a closing position baffle plate are disposed below a repulsive force coil of the repulsive force mechanism respectively. A movable iron core is positioned between the opening position baffle plate and the closing position baffle plate. A demagnetizing coil, a permanent magnet and a closing coil which match the movable iron core are disposed on an outer side of the movable iron core respectively. An opening spring is further disposed on an upper part of the output shaft. The distributed photovoltaic intelligent grid connection box is rapid in opening motion in a short time period, at the same time, has the advantages of low cost, small size, little energy consumption and high reliability, is suitable for frequent operation, and can be applied to grid connection of photovoltaic powers or various micro-grids.
Description
Technical field
The utility model relates to a kind of distributed photovoltaic intelligence net cage, is mainly used in photo-voltaic power supply to access large electrical network, and realizes 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
Along with the development of 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 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: in the time that 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, increase grid-connected difficulty and improvement cost.
(2) produce unexpected island effect, in the time that 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.
Utility model content
For addressing the above problem, the utility model provides a kind of distributed photovoltaic intelligence net cage, this and net cage can be fast from net in the time that large electrical network breaks down, and eliminates the impact of distributed photovoltaic system access on public large electrical network, improves and off-grid safety and reliability.
The technical scheme that the utility model adopts is:
A kind of distributed photovoltaic intelligence net cage, comprise casing circuit breaker, described circuit breaker is provided with operating mechanism, described operating mechanism is provided with the central control unit for controlling its action, described circuit breaker, operating mechanism and central control unit are arranged in a casing, described operating mechanism is rapid permanent-magnet operating mechanism, described rapid permanent-magnet operating mechanism comprises output shaft, the upper end of described output shaft connects described metal repulsion plate, 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 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 it, 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.
Preferably, described moving profile unshakable in one's determination can be cylindrical, is socketed on described output shaft, and described anti-magnetized coil, permanent magnet and closing coil can be cylindrical, is trapped among described output shaft outside, and and described moving iron core between leave gap.
Described metal repulsion plate conventionally can be in the form of annular discs, and correspondingly described repulsion coil is circular.
Preferably, on the loop of described repulsive force mechanism coil, can be provided with electric capacity and circuit switching.
Preferably, described central control unit connects the current sensing means that can be useful on detection line electric current, described central control unit is provided with the detection signal input interface circuit for receiving described current information, and the output of described current sensing means is connected to the input of described detection signal input interface circuit.
Preferably, 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 outside energy management main frame between the digital telecommunication circuit of two-way communication, 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.
This and 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 electricity consumption of repulsion coil power supply circuit, for example current transformer.
The beneficial effects of the utility model are:
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, can make to offset permanent magnet to moving fixation unshakable in one's determination at separating brake or feed motion by anti-magnetized coil, 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.
Owing to having adopted the repulsive force mechanism of repulsion coil and metal repulsion plate composition, and can be by the mode of precharge capacitor discharge for repulsion coil provides large electric current, the rapidity of separating brake action improved thus;
Due to be provided with can and outside energy management main frame between digital telecommunication circuit and the corresponding digital communication interface of two-way communication, 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, promote, save energy and reduce the cost significant to new forms of energy.
Brief description of the drawings
Fig. 1 is electrical principle block diagram of the present utility model;
Fig. 2 is the schematic diagram of repulsive force mechanism of the present utility model;
Fig. 3 is course of work schematic diagram of the present utility model;
Fig. 4 is the structural representation of the operating mechanism that relates to of the utility model.
Embodiment
Referring to Fig. 1-4; the utility model 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; the Intelligent integral equipment that micro-electric network protection observing and controlling and high speed circuit breaker are combined; can after fault, excise fast fault; switch to lonely Running State, the operating mechanism of circuit breaker, described circuit breaker is installed and for controlling the central control unit of its action in its casing.
Described rapid permanent-magnet operating mechanism is for driving the on/off switch action of circuit breaker, described central control unit is for the current information of received current checkout gear, process and logic analysis export operating mechanism divide-shut brake action described in control command control after current failure judging this current information, and described circuit breaker is provided with large power network wiring terminal and photovoltaic/micro-power network wiring terminal.
Referring to Fig. 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 the operating mechanism output shaft for driving 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 control the on-off controller K3 of this loop current switching.In the time that on-off controller 3 makes this loop closed, precharge electric capacity 4 discharges to repulsion coil 1, 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 composition repulsive force mechanism, described repulsive force mechanism is the switch operation mechanism that utilizes eddy current repulsion principle to make, and can drive at short notice load quick acting, therefore can realize quick acting switching-off.Through prototype test, obtain 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 ensure the reliable combined floodgate of high-speed switch in quick acting switching-off.Under normal circumstances, "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, cover and protective effect to form complete magnetic circuit and play.
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 the detection signal input interface circuit for receiving 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 utility model net cage, in the time that 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, carry out analog-to-digital conversion through described detection signal input interface circuit, then calculate according to aforesaid described processing and logic analysis step and the judgement of fault current, when judging that described detection electric current is fault current, send corresponding separating brake control command through drive circuit, thereby control described repulsive force mechanism action separating brake.
Described central control unit be also preferably provided with can and outside energy management main frame between the digital telecommunication circuit of two-way communication, 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, meet especially the core design theory of 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 command signal and the isoparametric new settings value of protection definite value etc. that can control operating mechanism action, realize Long-distance Control and the definite value adjustment to local distributed photovoltaic intelligence net cage with this.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 voltage or the current transformation unit of the circuit electricity consumption such as described remote signal input interface circuit and repulsion coil power supply circuit, have solved described distributed photovoltaic intelligence the inner electricity consumption of net cage and require the powerup issue of different circuit.When use, without other addressing corollary equipment, also simplify the installation of equipment.
Can improve to improve arithmetic speed by suitable software, reduce fault and judge the time.
The action of the utility model separating brake is fast, time is short, also there is cost low simultaneously, volume is little, less energy consumption, and control capacity is large, reliability is high, be applicable to the advantage 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 (9)
1. also net cage of a distributed photovoltaic intelligence, comprise circuit breaker, described circuit breaker is provided with operating mechanism, described operating mechanism is provided with the central control unit for controlling its action, described circuit breaker, operating mechanism and central control unit are arranged in a casing, it is characterized in that described operating mechanism is rapid permanent-magnet operating mechanism, described rapid permanent-magnet operating mechanism comprises output shaft, the upper end of described output shaft connects described metal repulsion plate, 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 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.
2. distributed photovoltaic intelligence as claimed in claim 1 net cage, it is characterized in that described moving profile unshakable in one's determination is cylindrical, be socketed on described output shaft, described anti-magnetized coil, permanent magnet and closing coil are cylindrical, be trapped among described output shaft outside, and and described moving iron core between leave gap.
3. distributed photovoltaic intelligence as claimed in claim 2 net cage, is characterized in that described metal repulsion plate is in the form of annular discs, and described repulsion coil is circular.
4. distributed photovoltaic intelligence as claimed in claim 3 net cage, is characterized in that the loop of described repulsive force mechanism coil is provided with electric capacity and circuit switching.
5. distributed photovoltaic intelligence as claimed in claim 4 net cage, it is characterized in that described central control unit is connected with the current sensing means for detection of line current, described central control unit is provided with the detection signal input interface circuit for receiving 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. distributed photovoltaic intelligence as claimed in claim 7 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.
9. distributed photovoltaic intelligence as claimed in claim 8 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320575538.6U CN203660549U (en) | 2013-09-17 | 2013-09-17 | Distributed photovoltaic intelligent grid connection box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320575538.6U CN203660549U (en) | 2013-09-17 | 2013-09-17 | Distributed photovoltaic intelligent grid connection box |
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| Publication Number | Publication Date |
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| CN203660549U true CN203660549U (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320575538.6U Expired - Lifetime CN203660549U (en) | 2013-09-17 | 2013-09-17 | Distributed photovoltaic intelligent grid connection box |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135072A (en) * | 2014-07-17 | 2014-11-05 | 泰兴市华诚机电制造有限公司 | Control method of distributed solar grid-connected control box |
| CN104135073A (en) * | 2014-07-17 | 2014-11-05 | 泰兴市华诚机电制造有限公司 | Distributed solar grid-connected control box and control method |
| CN104135029A (en) * | 2014-07-17 | 2014-11-05 | 泰兴市华诚机电制造有限公司 | Distributed solar grid-connected control box |
| CN115296344A (en) * | 2022-10-09 | 2022-11-04 | 深圳市耐斯特能源科技有限公司 | Bidirectional energy storage inverter based on grid-connected switching-on control technology |
-
2013
- 2013-09-17 CN CN201320575538.6U patent/CN203660549U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135072A (en) * | 2014-07-17 | 2014-11-05 | 泰兴市华诚机电制造有限公司 | Control method of distributed solar grid-connected control box |
| CN104135073A (en) * | 2014-07-17 | 2014-11-05 | 泰兴市华诚机电制造有限公司 | Distributed solar grid-connected control box and control method |
| CN104135029A (en) * | 2014-07-17 | 2014-11-05 | 泰兴市华诚机电制造有限公司 | Distributed solar grid-connected control box |
| CN104135072B (en) * | 2014-07-17 | 2016-08-17 | 泰兴市华诚机电制造有限公司 | A kind of control method of distributed solar energy cutting-in control case |
| CN115296344A (en) * | 2022-10-09 | 2022-11-04 | 深圳市耐斯特能源科技有限公司 | Bidirectional energy storage inverter based on grid-connected switching-on control technology |
| CN115296344B (en) * | 2022-10-09 | 2022-12-02 | 深圳市耐斯特能源科技有限公司 | Bidirectional energy storage inverter based on grid-connected switching-on control technology |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140618 |