CN103944227B - A kind of online active inversion discharge system for storage batteries of transformer substation - Google Patents
A kind of online active inversion discharge system for storage batteries of transformer substation Download PDFInfo
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- CN103944227B CN103944227B CN201410162332.XA CN201410162332A CN103944227B CN 103944227 B CN103944227 B CN 103944227B CN 201410162332 A CN201410162332 A CN 201410162332A CN 103944227 B CN103944227 B CN 103944227B
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Abstract
The invention discloses a kind of online active inversion discharge system for storage batteries of transformer substation, comprise: alternating current bus bar; The active-inverter be connected with alternating current bus bar, charging circuit; The charge/discharge control circuit be connected with charging circuit; The storage batteries of transformer substation be connected with active-inverter, charging circuit, charge/discharge control circuit respectively.The present invention realizes discharge process safety, energy saving standard, battery discharging process is without the need to departing from bus, the DC inverter of being released by storage battery becomes and the alternating current feedback grid of civil power with frequency homophase, the abnormal conditions such as mains failure or charging device fault are met in battery discharging process, stop electric discharge immediately, proceed to bussed supply.
Description
Technical field
The present invention relates to inverter power circuit, be specifically related to a kind of online active inversion discharge system for storage batteries of transformer substation.
Background technology
At present, power industry generally adopts " load type ", and discharge technology carries out storage battery checking discharge test, finds out batteries and cell Problems existing.In practice process, find that the method exists the shortcomings such as complicated operation, workload are large, heating potential safety hazard.
But, no matter adopt electrothermal device or active inversion electric discharge device to carry out storage battery I
10discharge test, batteries must depart from DC bus, is substituted by standby battery group.When only having a group storage battery group in standing, in core discharge capacitor, once there is the faults such as commercial power interruption, batteries can not provide back-up source to DC bus and bring potential safety hazard in time.
Summary of the invention
The object of the present invention is to provide a kind of online active inversion discharge system for storage batteries of transformer substation, realize discharge process safety, energy saving standard, battery discharging process is without the need to departing from bus, the DC inverter of being released by storage battery becomes and the alternating current feedback grid of civil power with frequency homophase, the abnormal conditions such as mains failure or charging device fault are met in battery discharging process, stop electric discharge immediately, proceed to bussed supply.
In order to achieve the above object, the present invention is achieved through the following technical solutions: a kind of online active inversion discharge system for storage batteries of transformer substation, is characterized in, comprises:
Alternating current bus bar;
The active-inverter be connected with alternating current bus bar, charging circuit;
The charge/discharge control circuit be connected with charging circuit;
The storage batteries of transformer substation be connected with active-inverter, charging circuit, charge/discharge control circuit respectively.
Described active-inverter comprises:
Active inverter, the direct current input anode of described active inverter connects the positive pole of storage batteries of transformer substation by a D.C. contactor; The direct current input negative terminal of described active inverter connects the negative pole of storage batteries of transformer substation;
The two-way ac output end of described active inverter connects alternating current bus bar and an ac fan respectively.
One first A.C. contactor is provided with between described active inverter and alternating current bus bar;
One second A.C. contactor is provided with between described active inverter and ac fan.
The first protective tube is provided with between the first described A.C. contactor and alternating current bus bar;
The second protective tube is provided with between the second described A.C. contactor and ac fan.
Described charging circuit comprises a charging module;
Described charging module input is connected with alternating current bus bar, and its output head anode connects charge/discharge control circuit by one first DC bus, and its negative pole of output end connects the negative pole of storage batteries of transformer substation by one second DC bus.
One first major loop protective tube is provided with between the first described DC bus and charge/discharge control circuit;
One second major loop protective tube is provided with between described second DC bus and storage batteries of transformer substation negative pole.
Described charge/discharge control circuit comprises:
One first fly-wheel diode;
Major loop contactor in parallel with the first fly-wheel diode respectively and charging contactor;
The described positive pole of the first fly-wheel diode is connected with the positive pole of storage batteries of transformer substation;
The described negative pole of the first fly-wheel diode is connected with the negative pole of storage batteries of transformer substation.
Described charge/discharge control circuit comprises second fly-wheel diode in parallel with the first fly-wheel diode further, and the positive pole of described second fly-wheel diode is connected with the positive pole of the first fly-wheel diode, and its negative pole is connected with the negative pole of described first fly-wheel diode.
Described charge/discharge control circuit comprises an emergency button further, and described emergency button is in parallel with described major loop contactor.
Described charge/discharge control circuit comprises the current-limiting charge resistance of a pair parallel connection further, and connecting with described charging contactor is connected the positive pole of storage batteries of transformer substation afterwards.
A kind of online active inversion discharge system for storage batteries of transformer substation of the present invention compared with prior art has the following advantages: storage batteries of transformer substation discharge process does not depart from bus, realizes safe-discharge; Access direct current system is simple, improves core discharge capacitor experiment work efficiency; Without the need to carrying heavy back-up source, reduce labour intensity; On-line monitoring " line voltage ", " busbar voltage " and " inverter voltage ", once occur abnormal, proceed to DC bus powered.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of a kind of online active inversion discharge system for storage batteries of transformer substation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.
As shown in Figure 1, a kind of online active inversion discharge system for storage batteries of transformer substation, comprise: alternating current bus bar 1, alternating current bus bar 1 connects two-way civil power; The active-inverter be connected with alternating current bus bar 1, charging circuit; The charge/discharge control circuit be connected with charging circuit; The storage batteries of transformer substation 5 be connected with active-inverter, charging circuit, charge/discharge control circuit respectively.
As shown in Figure 1, active-inverter comprises: active inverter 21, and the direct current of described active inverter 21 input anode is by D.C. contactor 22(model a: BCZ4-200-0111) connect the positive pole of storage batteries of transformer substation 5; The direct current input negative terminal of described active inverter 21 connects the negative pole of storage batteries of transformer substation 5; The two-way ac output end of active inverter 21 connects alternating current bus bar 1 and an ac fan 23 respectively.One first A.C. contactor 24(model: BC98-32Z is provided with) between active inverter 21 and alternating current bus bar 1; One second A.C. contactor 25(model: BC98-32Z is provided with) between active inverter 21 and ac fan 23.The first protective tube 26(model: RT18-32/4A is provided with) between first A.C. contactor 24 and alternating current bus bar 1; The second protective tube 27(model: RT18-32/4A is provided with) between second A.C. contactor 25 and ac fan 23.
Source inventer 21 is converted into alternating current for actual loading the direct current energy of storage batteries of transformer substation 5, and transformation efficiency is high, and caloric value is little, safe and reliable.
As shown in Figure 1, charging circuit comprises a charging module 31; Charging module 31 input is connected with alternating current bus bar 1, and its output head anode connects charge/discharge control circuit by one first DC bus 32, and its negative pole of output end connects the negative pole of storage batteries of transformer substation 5 by one second DC bus 33.One first major loop protective tube 34(model: RT18-32/4A is provided with) between first DC bus 32 and charge/discharge control circuit; One second major loop protective tube 35(model: RT18-32/4A is provided with) between second DC bus 33 and storage batteries of transformer substation 5 negative pole.
As shown in Figure 1, charge/discharge control circuit comprises: one first fly-wheel diode 41(model: MURT20060, adopts fin heat radiation, security insurance); Major loop contactor 42 in parallel with the first fly-wheel diode 41 respectively and charging contactor 43; The positive pole of the first fly-wheel diode 41 is connected with the positive pole of storage batteries of transformer substation 5; The negative pole of the first fly-wheel diode 41 is connected with the negative pole of storage batteries of transformer substation 5.Charge/discharge control circuit comprises second fly-wheel diode 44(model a: MURT20060 in parallel with the first fly-wheel diode 41 further, employing fin dispels the heat, security insurance), the positive pole of described second fly-wheel diode 44 is connected with the positive pole of the first fly-wheel diode 41, and its negative pole is connected with the negative pole of described first fly-wheel diode 41.It is GM5-63/2-C-63-08 that charge/discharge control circuit comprises an emergency button 45(model further), described emergency button 45 is in parallel with described major loop contactor 42.The current-limiting charge resistance 46(that charge/discharge control circuit also comprises a pair parallel connection adopts high-power resistance resistance 2R500W or 5R500W, model is RXLG-500W-5RJ, employing fin dispels the heat, security insurance), charging when minimizing pressure reduction is large is impacted, and is connected the positive pole of storage batteries of transformer substation 5 with described charging contactor 43 after connecting.Emergency button 45, manual closing storage batteries of transformer substation 5 positive pole loop, forced charge discharges, and prevents the contact of major loop contactor 42 bad; Promptly in particular cases use, disconnect at ordinary times.
Embody rule: during electric discharge, because DC bus (the first DC bus 32, second DC bus 33) voltage is higher than storage batteries of transformer substation 5 terminal voltage, first fly-wheel diode 41 and the second fly-wheel diode 44 end, and now charging module 31 charges to storage batteries of transformer substation 5.
In discharge process, civil power has fault or charging module 31 complete shut-down to cause DC bus-bar voltage to decline, cause DC bus-bar voltage lower than storage batteries of transformer substation 5 terminal voltage if DC bus-bar voltage is abnormal, first fly-wheel diode 41 and the second fly-wheel diode 44 conducting, storage batteries of transformer substation 5 is given DC bus powered, the TURP of storage batteries of transformer substation 5 is given load and is used, and proof load switches not power-off.
When electric discharge starts, the contactor major loop contactor 42 of normally-closed contact disconnects, D.C. contactor 22, first A.C. contactor 24 and the closed formation discharge loop of the second A.C. contactor 25.
In discharge off a period of time (as 10 minutes); D.C. contactor 22 disconnects, and charging contactor 43 closes, and the charging current of charging module 31 charges to storage batteries of transformer substation 5 through the current-limiting charge resistance 46 of a pair parallel connection; avoid large current charge, protection storage batteries of transformer substation 5.Large current charge will be caused to impact in order to avoid pressure reduction between storage batteries of transformer substation 5 and DC bus greatly directly charges, and first have high-power resistance to carry out current-limiting charge by inside charging contactor 43 adhesive charge circuit.
After discharge off a period of time (as 10 minutes), major loop contactor 42 closes, and charging module 31 charges directly to storage batteries of transformer substation 5 without the current-limiting charge resistance 46 of a pair parallel connection.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (6)
1., for an online active inversion discharge system for storage batteries of transformer substation, it is characterized in that, comprise:
Alternating current bus bar (1);
The active-inverter, the charging circuit that are connected with alternating current bus bar (1);
The charge/discharge control circuit be connected with charging circuit;
The storage batteries of transformer substation (5) be connected with active-inverter, charging circuit, charge/discharge control circuit respectively;
Described charge/discharge control circuit comprises:
One first fly-wheel diode (41);
Major loop contactor (42) in parallel with the first fly-wheel diode (41) respectively and charging contactor (43);
The positive pole of described first fly-wheel diode (41) is connected with the positive pole of storage batteries of transformer substation (5);
The negative pole of described first fly-wheel diode (41) is connected with the negative pole of storage batteries of transformer substation (5);
One second fly-wheel diode (44) in parallel with the first fly-wheel diode (41), the positive pole of described second fly-wheel diode (44) is connected with the positive pole of the first fly-wheel diode (41), and its negative pole is connected with the negative pole of described first fly-wheel diode (41);
One emergency button (45), described emergency button (45) is in parallel with described major loop contactor (42);
The current-limiting charge resistance (46) of a pair parallel connection, is connected the positive pole of storage batteries of transformer substation (5) with described charging contactor (43) after connecting.
2. online active inversion discharge system as claimed in claim 1, it is characterized in that, described active-inverter comprises:
Active inverter (21), the direct current input anode of described active inverter (21) connects the positive pole of storage batteries of transformer substation (5) by a D.C. contactor (22); The direct current input negative terminal of described active inverter (21) connects the negative pole of storage batteries of transformer substation (5);
The two-way ac output end of described active inverter (21) connects alternating current bus bar (1) and an ac fan (23) respectively.
3. online active inversion discharge system as claimed in claim 2, is characterized in that, be provided with one first A.C. contactor (24) between described active inverter (21) and alternating current bus bar (1);
One second A.C. contactor (25) is provided with between described active inverter (21) and ac fan (23).
4. online active inversion discharge system as claimed in claim 3, is characterized in that, be provided with the first protective tube (26) between described the first A.C. contactor (24) and alternating current bus bar (1);
The second protective tube (27) is provided with between described the second A.C. contactor (25) and ac fan (23).
5. online active inversion discharge system as claimed in claim 1, it is characterized in that, described charging circuit comprises a charging module (31);
Described charging module (31) input is connected with alternating current bus bar (1), its output head anode connects charge/discharge control circuit by one first DC bus (32), and its negative pole of output end connects the negative pole of storage batteries of transformer substation (5) by one second DC bus (33).
6. online active inversion discharge system as claimed in claim 5, is characterized in that, be provided with one first major loop protective tube (34) between described the first DC bus (32) and charge/discharge control circuit;
One second major loop protective tube (35) is provided with between described second DC bus (33) and storage batteries of transformer substation (5) negative pole.
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| CN201410162332.XA CN103944227B (en) | 2014-04-22 | 2014-04-22 | A kind of online active inversion discharge system for storage batteries of transformer substation |
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| CN201410162332.XA CN103944227B (en) | 2014-04-22 | 2014-04-22 | A kind of online active inversion discharge system for storage batteries of transformer substation |
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| CN103944227B true CN103944227B (en) | 2016-02-17 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467332A (en) * | 2015-12-15 | 2016-04-06 | 云南电网有限责任公司电力科学研究院 | Transformer station DC source active inversion on-line detection system |
| CN108336430A (en) * | 2018-04-24 | 2018-07-27 | 广东电网有限责任公司 | Intelligent storage battery on-line nuclear storage capacitor accommodating control device |
| CN109038828B (en) * | 2018-08-27 | 2022-04-22 | 深圳供电局有限公司 | Transformer substation storage battery and storage battery chamber integrated control system and control method thereof |
| CN110568368A (en) * | 2019-09-17 | 2019-12-13 | 陕西意联电气设备有限公司 | Method and device for online nuclear capacity discharge of storage battery of power system |
| CN112564196A (en) * | 2019-09-26 | 2021-03-26 | 阿里巴巴集团控股有限公司 | Nuclear capacity discharge protection device and power supply system |
| CN110703111B (en) * | 2019-10-22 | 2023-02-03 | 深圳先阳新能源技术有限公司 | Novel storage battery double-flow alternating-measurement nuclear capacity testing machine |
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| US20140078801A1 (en) * | 2012-09-17 | 2014-03-20 | Chrysler Group Llc | Advanced dc voltage adjustment using switched capacitors |
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