CN204928562U - A chain link voltage balancing unit for three -phase chain high pressure active filter - Google Patents
A chain link voltage balancing unit for three -phase chain high pressure active filter Download PDFInfo
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- CN204928562U CN204928562U CN201520539574.6U CN201520539574U CN204928562U CN 204928562 U CN204928562 U CN 204928562U CN 201520539574 U CN201520539574 U CN 201520539574U CN 204928562 U CN204928562 U CN 204928562U
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model relates to a chain link voltage balancing unit for three -phase chain high pressure active filter, wave filter include three chain link, and voltage balancing unit includes the balance control ware to and the three balance of voltage ware that is used for controlling three chain link stabilization of output respectively, the one end of three balance of voltage ware all with balance control ware chain link, the other end corresponds with the three chain link of wave filter respectively and is connected. Compared with the prior art, the utility model discloses a direct current of each looks chain link of dynamic control side output voltage need not real -timely to carry out PI control to the chain link unit, can save monitoring cost, and the keep -It -Simple -Control procedure improves work efficiency.
Description
Technical field
The utility model relates to a kind of voltage balancing device, especially relates to a kind of chain link voltage balancing device for three-phase chain high voltage active filter.
Background technology
As shown in Figure 1, chain type Three-phase electric-wave filter comprises three chain links, the chain link of every phase includes multiple link units, the unit DC voltage of chain H bridge Active Power Filter-APF is separate, DC side does not consume active power in ideal conditions, can maintain the balance of each DC voltage preferably.But in actual applications, due to the reason such as switching characteristic, shunt loss, DC bus capacitor discharge and recharge time difference of each switching device, the imbalance of modules DC voltage can be caused, thus cause output voltage and current distortion, switching device voltage unbalanced stress, or even the safety of burning that switching device jeopardizes whole system.Based on this, balance detection must be carried out to the H-bridge unit DC voltage of Active Power Filter-APF, so that the meritorious exchange of control device and system in the controls, DC capacitor voltage be controlled within normal range (NR).
At present, for the chain link balance of voltage, usually adopt the mode of each link units being carried out to PI adjustment, like this after completing the balance of voltage of each link units, naturally also complete the dc-voltage balance of each phase chain link.Then, many times, one phase chain link has multiple link units, and along with the development of technology, the ability to bear of each link units promotes all greatly, in this case, if still adopt the mode to each link units controls can bring extra cost, and the load of master controller can be brought larger.
Utility model content
The purpose of this utility model be exactly in order to overcome above-mentioned prior art exist defect and a kind of chain link voltage balancing device for three-phase chain high voltage active filter is provided.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of chain link voltage balancing device for three-phase chain high voltage active filter, described filter comprises three chain links, described voltage balancing device comprises balance controller, and three balance of voltage devices being respectively used to control three chain link output voltage stabilizations, one end of described three balance of voltage devices all with balance controller chain link, the other end is corresponding with three chain links of filter respectively to be connected.
Described balance of voltage device comprises the voltage collection circuit and executive circuit that are all connected with balance controller, and described voltage collection circuit is all connected with respective link with executive circuit;
Described voltage collection circuit gathers the corresponding output voltage connected, and after being sent to balance controller, is contrasted between collection value and setting district by balance controller, and is maintained in setting district by executive circuit rectification output voltage.
Described voltage collection circuit is connected with the output of respective link, and described executive circuit is connected with the input of respective link;
When the output voltage of respective link departs between setting district, balance controller instruction executive circuit to the input injecting compensating component of this chain link, and then realizes the rectification to output voltage.
Described each chain link comprises the link units of multiple cascade; described voltage balancing device also comprises multiple cell protection device for IGBT switch in the break-make link units when link units fault, and described cell protection device connects one to one with multiple link units respectively.
Described voltage balancing device also comprise for generation of and the host computer of recording voltage balancer and cell protection device daily record of work, this host computer be connected with all cell protection devices and balance of voltage device respectively.
Compared with prior art, the utility model has the following advantages:
1) by the DC side output voltage of each phase chain link of Dynamic controlling, without the need to real-time, PI control is carried out to link units, can save and control cost, simplify control program, increase work efficiency.
2) cell protection device can when link units be abnormal, and carry out break-make control, this break-make controls different from the balance of voltage, and structure is simple, and load is little, also improves the reliability of voltage balancing device simultaneously.
3) host computer can produce and recording voltage balancer and cell protection device daily record of work, for the improvement of subsequent product provides foundation.
Accompanying drawing explanation
Fig. 1 is the structural representation of three-phase chain high voltage active filter and access point circuit thereof;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is the structural representation of balance of voltage device;
Fig. 4 is the syndeton schematic diagram of a chain link lower unit protector and host computer in the utility model embodiment two;
Wherein: 1, chain link, 2, user load, 3, balance of voltage device, 4, balance controller, 5, cell protection device, 6, host computer, 11, link units, 31, voltage collection circuit, 32, executive circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.The present embodiment is implemented premised on technical solutions of the utility model, give detailed execution mode and concrete operating process, but protection range of the present utility model is not limited to following embodiment.
Embodiment one:
A kind of chain link voltage balancing device for three-phase chain high voltage active filter, as shown in Figure 2, filter comprises three chain links 1, voltage balancing device comprises balance controller 4, and three balance of voltage devices 3 being respectively used to control three chain link 1 output voltage stabilizations, one end of three balance of voltage devices 3 all with balance controller 4 chain link 1, the other end is corresponding with three chain links 1 of filter respectively to be connected.
As shown in Figure 3, balance of voltage device 3 comprises the voltage collection circuit 31 and executive circuit 32 that are all connected with balance controller 4, and voltage collection circuit 31 is all connected with respective link 1 with executive circuit 32; Voltage collection circuit 31 gathers the corresponding output voltage connected, and after being sent to balance controller 4, is contrasted between collection value and setting district by balance controller 4, and corrects output voltage by executive circuit 32 and maintain in setting district.
Voltage collection circuit 31 is connected with the output of respective link 1, and executive circuit 32 is connected with the input of respective link 1; When the output voltage of respective link 1 departs between setting district, balance controller 4 indicates executive circuit 32 to the input injecting compensating component of this chain link 1, and then realizes the rectification to output voltage.
Concrete, the mode adopting PI to regulate maintains the stable of DC side, contrast between collection value and setting district, if higher or lower than between this setting district, then by input (AC) the injecting compensating component of executive circuit 32 to chain link 1, then be added in the active current of compensation, in harmonic wave command signal electric current, certain fundamental active component is comprised through computing, and then amplitude limit is done to output (DC side) voltage of each chain link control, until within this voltage comes back to threshold value.
Embodiment two:
Do not describing with the something in common in embodiment one in the present embodiment, only describing difference.
Each chain link 1 comprises the link units 11 of multiple cascade; compared with embodiment one; the remarkable difference of the present embodiment is; as shown in Figure 4; in the present embodiment, voltage balancing device also comprises multiple cell protection device 5 for IGBT switch in the break-make link units 11 when link units 11 fault, and cell protection device 5 connects one to one with multiple link units 11 respectively.
Voltage balancing device also comprise for generation of and the host computer 6 of recording voltage balancer 3 and cell protection device 5 daily record of work, this host computer 6 be connected with all cell protection devices 5 and balance of voltage device 3 respectively.
Claims (5)
1. the chain link voltage balancing device for three-phase chain high voltage active filter, described filter comprises three chain links, it is characterized in that, described voltage balancing device comprises balance controller, and three balance of voltage devices being respectively used to control three chain link output voltage stabilizations, one end of described three balance of voltage devices all with balance controller chain link, the other end is corresponding with three chain links of filter respectively to be connected.
2. a kind of chain link voltage balancing device for three-phase chain high voltage active filter according to claim 1, it is characterized in that, described balance of voltage device comprises the voltage collection circuit and executive circuit that are all connected with balance controller, and described voltage collection circuit is all connected with respective link with executive circuit.
3. a kind of chain link voltage balancing device for three-phase chain high voltage active filter according to claim 2, it is characterized in that, described voltage collection circuit is connected with the output of respective link, and described executive circuit is connected with the input of respective link.
4. a kind of chain link voltage balancing device for three-phase chain high voltage active filter according to any one of claim 1-3; it is characterized in that; described each chain link comprises the link units of multiple cascade; described voltage balancing device also comprises multiple cell protection device for IGBT switch in the break-make link units when link units fault, and described cell protection device connects one to one with multiple link units respectively.
5. a kind of chain link voltage balancing device for three-phase chain high voltage active filter according to claim 4; it is characterized in that; described voltage balancing device also comprise for generation of and the host computer of recording voltage balancer and cell protection device daily record of work, this host computer be connected with all cell protection devices and balance of voltage device respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520539574.6U CN204928562U (en) | 2015-07-23 | 2015-07-23 | A chain link voltage balancing unit for three -phase chain high pressure active filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520539574.6U CN204928562U (en) | 2015-07-23 | 2015-07-23 | A chain link voltage balancing unit for three -phase chain high pressure active filter |
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| Publication Number | Publication Date |
|---|---|
| CN204928562U true CN204928562U (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520539574.6U Active CN204928562U (en) | 2015-07-23 | 2015-07-23 | A chain link voltage balancing unit for three -phase chain high pressure active filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374730A (en) * | 2015-07-23 | 2017-02-01 | 利思电气（上海）有限公司 | Chain link voltage balancing device for three-phase chain high-voltage active power filter |
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2015
- 2015-07-23 CN CN201520539574.6U patent/CN204928562U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374730A (en) * | 2015-07-23 | 2017-02-01 | 利思电气（上海）有限公司 | Chain link voltage balancing device for three-phase chain high-voltage active power filter |
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