CN204441905U - A kind of self-starting system of energy accumulation current converter - Google Patents
A kind of self-starting system of energy accumulation current converter Download PDFInfo
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- CN204441905U CN204441905U CN201520112304.7U CN201520112304U CN204441905U CN 204441905 U CN204441905 U CN 204441905U CN 201520112304 U CN201520112304 U CN 201520112304U CN 204441905 U CN204441905 U CN 204441905U
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Abstract
The utility model relates to a kind of self-starting system of energy accumulation current converter.System mainly comprises DC side power supply, DC side circuit breaker, DC side contactor, energy accumulation current converter, AC contactor, electrical network/load, low capacity switch, high-order draw-out power supply, Switching Power Supply and DC load.During startup, control section is first by storage battery power supply, and the high voltage direct current in storage battery drops to control section required voltage through high-order draw-out power supply, to power supplies such as current transformer master control borad, monitoring screens.After master control borad controls main circuit conducting, Switching Power Supply is converted to low voltage control electricity from the power taking of energy accumulation current converter AC and replaces high-order draw-out power supply and powers.The start up system that the utility model proposes and method are without the need to external auxiliary power supply, and no matter energy accumulation current converter is in grid-connected or can completes self-starting from net state, improves the reliability of system, has saved cost.
Description
Technical field
The utility model relates to a kind of self-starting system of energy accumulation current converter.
Technical background
After entering 21st century, the general layout of world energy sources there occurs change, and the development and utilization of the new energy technology being representative with wind power generation, photovoltaic generation is more and more extensive.Meanwhile, in order to solve conventional electric power system centralized power generation, long range propagation, problem away from load center, country greatly develops and can access distributed power source, operational mode micro-capacitance sensor technology flexibly.Due to the needs that randomness and the micro-capacitance sensor self of the power output of generation of electricity by new energy are formed, battery energy storage system more and more highlights its important function, and it can open peak load shifting, improves the stability of a system, stabilizes power fluctuation, improve the effects such as the quality of power supply.Energy storage two way convertor realizes the key equipment that between DC energy storage battery and AC network, bidirectional energy transmits, and its control performance decides reliability, the important indicator such as control precision and the output quality of power supply of whole energy-storage system.As the key equipment in microgrid energy-storage system, the development of energy accumulation current converter and the development of microgrid energy storage closely related.
But there are some defects in the method that the startup of energy accumulation current converter equipment now in energy-storage system or micro-grid system adopts, typically has two kinds: a kind of be from electrical network power taking after conversion as control power supply to control the startup of energy accumulation current converter; Another kind method is that outfit UPS is as startup power supply; These two kinds of methods have respective drawback, as first method, when grid power blackout, energy accumulation current converter then cannot start, second method needs configuration additional configuration ups power, because general UPS directly can not connect high-voltage DC power supply, need the storage battery of additional configuration 48V or 96V, add cost, reduce system reliability simultaneously.
Summary of the invention
The utility model object is the self-starting system providing a kind of energy accumulation current converter for above-mentioned weak point
,be a kind of without external auxiliary power supply, directly from system, storage battery power taking starts, and no matter system is in also net state or from net state, all can conveniently start.
A kind of self-starting system of energy accumulation current converter takes following technical scheme to realize:
A kind of self-starting system of energy accumulation current converter comprises DC side power supply, DC side circuit breaker Q F1, DC side contactor KM1, energy accumulation current converter, AC contactor KM2, electrical network/load, low capacity switch, high-order draw-out power supply, Switching Power Supply, counnter attack diode D1 and D2, counnter attack diode D3 and DC load.
In described system, DC side power supply is connected with the DC side of energy accumulation current converter by DC side circuit breaker Q F1, DC side contactor KM1; The AC of energy accumulation current converter is connected with electrical network/load by AC contactor KM2; Low capacity switch in parallel is in DC side contactor KM1 both sides; The input of high-order draw-out power supply is connected between DC side circuit breaker Q F1 and DC side contactor KM1, and output is connected on the power input of DC load, wherein to connect two counnter attack diode D1 and D2 at the positive pole of high-order draw-out power supply; The input of Switching Power Supply is connected in any phase of output of energy accumulation current converter, and output is connected on the power input of DC load, a series connection counnter attack diode D3 on the positive pole of wherein switched power output; Drive singal in DC load is connected with the IGBT in energy accumulation current converter respectively at low capacity switch by drive wire L1 with L2.
Described DC load comprises current transformer master control borad and monitoring screen.
The connected mode of DC load part is as follows:
The output of high-order draw-out power supply and Switching Power Supply connects the power input interface of current transformer master control borad and monitoring screen; The drive singal that current transformer master control borad exports is connected with the driving interface of the IGBT in energy accumulation current converter and low capacity switch respectively by two winding displacements; The communication interface of current transformer master control borad is connected with the communication interface of monitoring screen by two holding wires.
DC side power supply is storage battery, and storage battery can be the common energy-storage battery such as lead-acid battery, lithium battery, and battery tension is generally 400V ~ 1000V.
Operation principle is as follows:
After close circuit breaker QF1, high-order draw-out power supply obtains electric startup optimization, exports to control the outlet side of electric V1, V1 and to connect two diode step-downs, makes output a little less than 24V; Systematical control part obtains electric startup from high-order draw-out power supply, and in this example, current transformer master control borad and monitoring screen etc. all start; Current transformer master control borad sends the IGBT conducting that control signal makes in low capacity switch and energy accumulation current converter, and now contactor KM1 is by low capacity switch bypass, and DC side forms path to AC, and system enters inversion operating state, AC output AC electricity;
After AC output AC electricity, Switching Power Supply obtains electric startup optimization from AC, and under the clamping action of diode D1, D2 and D3, export and control electric V2 slightly larger than V1, the V2 that Systematical control part transfers Switching Power Supply output to powers;
After current transformer master control borad detects Switching Power Supply work, send control signal and make contactor KM1 adhesive, then send cut-off signals and make low capacity switch OFF, then send control signal and make KM2 adhesive; So far, main circuit conducting, system completes self-starting.
A self-start method for energy accumulation current converter, the step of described method is as follows:
(1) closed DC side circuit breaker Q F1, high-order draw-out power supply obtains electric startup;
(2) high-order draw-out power supply exports DC control electricity V1 after starting, and DC control electricity V1 is lower than 24V two diode drops;
(3) DC load obtains electric, and current transformer master control borad and monitoring screen start;
(4) current transformer master control borad exports control signal, controls the three-phase IGBT conducting in low capacity switch and energy accumulation current converter, then main circuit conducting, energy accumulation current converter output AC electricity;
(5) Switching Power Supply is run from the power taking of energy accumulation current converter AC, exports and controls electric V2, V2 lower than 24V diode drop;
(6) control the electric V1 of electric V2 replacement control to power to the DC load of Systematical control part;
(7) system AC obtain electric after, current transformer master control borad sends signal and makes DC side contactor KM1 adhesive, and then signaling turns off low capacity switch, then sends the adhesive of signal controlling AC contactor, and system completes self-starting process.
The utility model excellent effect compared with immediate existing correlation technique is:
(1), in technical solutions of the utility model, the startup of current transformer does not need extra ups system to power;
(2) technical solutions of the utility model applicability is strong, and no matter energy accumulation current converter is in and net state or from net state, and system starts the self-starting all carrying out current transformer from storage battery power taking and runs;
(3) storage battery in technical solutions of the utility model can be the various common cell such as lead-acid battery, sodium-sulphur battery or lithium battery;
(4) power that technical solutions of the utility model can make standby control electricity reduces as far as possible, only need meet device start, and do not need needs to be equipped with the capacity times over actual power as general UPS back-up source, has saved cost;
(5) in technical solutions of the utility model, high-order draw-out power supply, low capacity switch, Switching Power Supply etc. can be integrated in device interior, and level of integrated system is high.
Accompanying drawing explanation
Below with reference to accompanying drawing, the utility model is described in further detail:
Accompanying drawing 1 is the self-starting system structure principle chart of a kind of energy accumulation current converter of the utility model.
Accompanying drawing 2 is DC load schematic diagrams of the control section of the self-starting system of a kind of energy accumulation current converter of the utility model.
Accompanying drawing 3 is self-start method flow charts of a kind of energy accumulation current converter of the utility model.
Embodiment
With reference to accompanying drawing 1 ~ 3, a kind of self-starting system of energy accumulation current converter comprises DC side power supply (101), DC side circuit breaker Q F1(102), DC side contactor KM1(103), energy accumulation current converter (104), AC contactor KM2(105), electrical network/load (106), low capacity switch (203), high-order draw-out power supply (202), Switching Power Supply (204), counnter attack diode D1 and D2(205), counnter attack diode D3(206) and DC load (201).
In described system, DC side power supply (101) is by DC side circuit breaker Q F1(102), DC side contactor KM1(103) be connected with the DC side of energy accumulation current converter (104); The AC of energy accumulation current converter (104) is by AC contactor KM2(105) be connected with electrical network/load (106); Low capacity switch (203) is connected in parallel on DC side contactor KM1(103) both sides; The input of high-order draw-out power supply (202) is connected on DC side circuit breaker Q F1(102) and DC side contactor KM1(102) between, output is connected on the power input of DC load (201), wherein to connect two counnter attack diode D1 and D2(205 at the positive pole of high-order draw-out power supply (202)); The input of Switching Power Supply (204) is connected in any phase of output of energy accumulation current converter (104), output is connected on the power input of DC load (201), a series connection counnter attack diode D3(206 on the positive pole of wherein Switching Power Supply (204) output); Drive singal in DC load (201) is connected with the IGBT in energy accumulation current converter (104) respectively at low capacity switch (203) by drive wire L1 with L2.
DC load comprises current transformer master control borad and monitoring screen.The connected mode of DC load part is as follows:
The output of high-order draw-out power supply and Switching Power Supply connects the power input interface of current transformer master control borad and monitoring screen; The drive singal that current transformer master control borad exports is connected with the driving interface of the IGBT in energy accumulation current converter and low capacity switch respectively by two winding displacements; The communication interface of current transformer master control borad is connected with the communication interface of monitoring screen by two holding wires.
DC side power supply is storage battery, and storage battery can be the common energy-storage battery such as lead-acid battery, lithium battery, and battery tension is generally 400V ~ 1000V.
A self-start method for energy accumulation current converter, the step of described method is as follows:
(1) closed DC side circuit breaker Q F1(102), high-order draw-out power supply (202) obtains electric startup;
(2) high-order draw-out power supply (202) exports DC control electricity V1 after starting, and DC control electricity V1 is a little less than 24V;
(3) DC load (201) obtains electric, and current transformer master control borad and monitoring screen start;
(4) current transformer master control borad exports control signal, controls the three-phase IGBT conducting in low capacity switch (203) and energy accumulation current converter (104), then main circuit conducting, energy accumulation current converter (104) output AC electricity;
(5) Switching Power Supply (204) is run from energy accumulation current converter (104) AC power taking, exports and controls electric V2, control electric V2 a little more than V1 under the clamping action of diode D1, D2 and D3;
(6) control the electric V1 of electric V2 replacement control to power to the DC load of Systematical control part;
(7) system AC obtain electric after, current transformer master control borad sends signal and makes DC side contactor KM1 adhesive, and then signaling turns off low capacity switch, then sends the adhesive of signal controlling AC contactor, and system completes self-starting process.
Startup power supply for current transformer in the utility model method does not rely on externally fed, only need the storage battery power supply of system self to start, and in traditional starting method, it is generally from electrical network power taking or power taking from the UPS of additional configuration that the startup of current transformer is powered.This method can save outside UPS equipment and outer low pressure storage battery, and the low capacity switch used in method, high-order draw-out power supply and Switching Power Supply can be integrated in energy accumulation current converter inside, makes the integrated level of system higher, and reliability strengthens.
Below in conjunction with the drawings and specific embodiments, the utility model is further illustrated.
Figure 1 show the circuit structure diagram of a kind of exemplary embodiments of the self-starting system of a kind of energy accumulation current converter of the utility model.In described system, storage battery (101) is successively by DC side circuit breaker Q F1(102), DC side contactor KM1(103) be connected with the DC side of energy accumulation current converter (104); The AC of energy accumulation current converter (104) is by AC contactor KM2(105) be connected with electrical network/load (106); Low capacity switch (203) is connected in parallel on DC side contactor KM1(103) both sides; The input of high-order draw-out power supply (202) is connected on DC side circuit breaker Q F1(102) and DC side contactor KM1(102) between, output is connected on the power input of DC load (201), wherein to connect two counnter attack diode D1 and D2(205 at the positive pole of high-order draw-out power supply (202)); The input of Switching Power Supply (204) is connected in any phase of output of energy accumulation current converter (104), output is connected on the power input of DC load (201), a series connection counnter attack diode D3(206 on the positive pole of wherein Switching Power Supply (204) output); Drive singal in DC load (201) is connected with the IGBT in low capacity switch (203) and energy accumulation current converter (104) respectively by drive wire L1 with L2.
In present case, energy accumulation current converter power is 100kVA, DC side input voltage range 400 ~ 900V, and AC exports as three-phase main-frequency alternating current.
The low capacity switch used in the utility model self-starting system can be solid-state switch, low capacity relay or the various controlled low capacity switching device such as SCR, IGBT, MOSFET, GTO, IGCT, but is not limited thereto; Driving turn-on and turn-off can be carried out with low-voltage, small area analysis signal, impulse current during direct voltage and the current transformer startup of storage battery side can be born.In present case, low capacity switch adopts the thyristor SCR of SEMIKRON company, and model is SKKT27/12E.
Main control chip on described current transformer master control borad can have multiple choices, as TMS320F2808, TMS320F2812, TMS320F28335 chip of main flow on market, uses the TMS320F28335 chip of TI company in present case.
Described monitoring screen can use LED screen common on market or LCD screen, selects 10.2 cun of LCDs of the Kunlun on-state company in present case.
High-order draw-out power supply input side can adapt to multiple DC voltage level, and the high voltage direct current of input side is converted to low pressure 24V direct current and exports, power grade only need meet control section needs.The NH120-V2S24 power supply of Guangzhou Neng Da power technology Co., Ltd is adopted in present case.
The input side voltage of Switching Power Supply is the alternating voltage 220V that current transformer inversion exports, and exports as 24V, V2 are slightly larger than V1, powers to control section.The S8VK-C12024 power supply of Omron Corp is adopted in present case.
The power supply of powering to control section in this method has two: high-order draw-out power supply and Switching Power Supply.Give with high-order draw-out power supply during beginning and control electricity power supply, the voltage V1 that high-order draw-out power supply exports a little less than control piezoelectric voltage, can meet control section simultaneously and power, and power output end is connected two counnter attack diode D1 and D2; Be that control section is powered by Switching Power Supply after main circuit conducting, power output end is connected a diode D3, and the voltage V2 that Switching Power Supply exports a little more than V1, and can meet control section power reguirements; Due to the clamping action of diode, V1 ends, and is powered separately by Switching Power Supply.
Described high-order draw-out power supply (202) is a kind of direct-current voltage conversion device, high voltage direct current can be converted to low-voltage DC.
Described low capacity switch (203) can be various low power relay, or the various common controllable type low capacity switching device such as IGBT, MOSFET, GTO, IGCT, low capacity switch (203) is in parallel with DC side contactor (103), can play the effect of interim conducting main circuit when current transformer starts;
Described Switching Power Supply (204) is a kind of AC conversion apparatus, is input as alternating current, exports as controlling piezoelectric voltage V2;
There is pressure reduction in voltage V1 and the V2 that the high-order draw-out power supply (202) in circuit and Switching Power Supply (204) export, V2 is a little more than V1, at diode D1 and D2(205) clamping action under, Switching Power Supply (204) can be realized to the replacement of high-order draw-out power supply (202).
The self-starting system of energy accumulation current converter can replace in legacy equipment to be needed to carry out with ups power the method that starts, saves ups power.During startup, no matter current transformer is in from net or also net state, and DC high voltage all from the high-pressure side power taking of storage battery side, is dropped to control section required voltage through high-order draw-out power supply by control section, to power supplies such as current transformer master control borad and monitoring screens.When needs starting device, closed DC side circuit breaker Q F1, high-order draw-out power supply, from storage battery power taking, is converted into low-voltage V1, for control circuit; Current transformer master control borad runs self-triggered program after opening, and transmit control signal the three-phase IGBT conducting made in low capacity switch and inversion module, and now main circuit conducting, inversion can go out three-phase alternating current.Then Switching Power Supply is converted to low voltage control electricity V2, V2 a little more than V1 from AC power taking, and now high-order draw-out power supply does not work, and is provided control electricity by Switching Power Supply; V2 is for the low pressure low-power equipment such as current transformer master control borad and monitoring screen.When after the adhesive of main circuit contact device, current transformer master control borad exports cut-off signals and controls low capacity switch OFF.Current transformer enters normal operating condition, completes the start-up course of current transformer.
The utility model self-starting system applicability is stronger; the introduction of above-mentioned workflow is one of typical apply during the utility model self-starting system uses; in circuit, part of devices can be replaced with the device with identity function; this programme is still suitable for; when general principle is constant, all belong to the protection range of this patent.
Claims (7)
1. a self-starting system for energy accumulation current converter, is characterized in that: comprise DC side power supply, DC side circuit breaker Q F1, DC side contactor KM1, energy accumulation current converter, AC contactor KM2, electrical network/load, low capacity switch, high-order draw-out power supply, Switching Power Supply, counnter attack diode D1 and D2, counnter attack diode D3 and DC load;
In described system, DC side power supply is connected with the DC side of energy accumulation current converter by DC side circuit breaker Q F1, DC side contactor KM1; The AC of energy accumulation current converter is connected with electrical network/load by AC contactor KM2; Low capacity switch in parallel is in DC side contactor KM1 both sides; The input of high-order draw-out power supply is connected between DC side circuit breaker Q F1 and DC side contactor KM1, and output is connected on the power input of DC load, wherein to connect two counnter attack diode D1 and D2 at the positive pole of high-order draw-out power supply; The input of Switching Power Supply is connected in any phase of output of energy accumulation current converter, and output is connected on the power input of DC load, a series connection counnter attack diode D3 on the positive pole of wherein switched power output; Drive singal in DC load is connected with energy accumulation current converter respectively at low capacity switch by drive wire L1 with L2.
2. the self-starting system of a kind of energy accumulation current converter according to claim 1, is characterized in that: described DC load comprises current transformer master control borad and monitoring screen;
The output of high-order draw-out power supply and Switching Power Supply connects the power input interface of current transformer master control borad and monitoring screen; The drive singal that current transformer master control borad exports is connected with the driving interface of the IGBT in energy accumulation current converter and low capacity switch respectively by two winding displacements; The communication interface of current transformer master control borad is connected with the communication interface of monitoring screen by two holding wires.
3. the self-starting system of a kind of energy accumulation current converter according to claim 1, is characterized in that: DC side power supply is storage battery.
4. the self-starting system of a kind of energy accumulation current converter according to claim 1, is characterized in that: described high-order draw-out power supply is a kind of direct-current voltage conversion device, high voltage direct current can be converted to low-voltage DC.
5. the self-starting system of a kind of energy accumulation current converter according to claim 1, is characterized in that: described low capacity switch is in parallel with DC side contactor, can play the effect of interim conducting main circuit when current transformer starts.
6. the self-starting system of a kind of energy accumulation current converter according to claim 1, is characterized in that: described Switching Power Supply is a kind of AC conversion apparatus, is input as alternating current, exports as controlling piezoelectric voltage V2.
7. the self-starting system of a kind of energy accumulation current converter according to claim 1, it is characterized in that: under the clamping action of diode D1, D2 and D3, there is pressure reduction in the voltage V1 that the high-order draw-out power supply in circuit exports and the voltage V2 that Switching Power Supply exports, V2, higher than V1, can realize the replacement of Switching Power Supply to high-order draw-out power supply.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682431A (en) * | 2015-02-16 | 2015-06-03 | 江苏中天科技股份有限公司 | Self-starting method and self-starting system of energy storage converter |
| CN106972738A (en) * | 2017-04-28 | 2017-07-21 | 荣信汇科电气技术有限责任公司 | A kind of include can turn off the high potential energy collecting device and method of start-up circuit |
| CN109494776A (en) * | 2018-11-30 | 2019-03-19 | 北京科诺伟业科技股份有限公司 | The grid-connected bidirectional converter of energy-storage system and off-network double mode operation method |
-
2015
- 2015-02-16 CN CN201520112304.7U patent/CN204441905U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682431A (en) * | 2015-02-16 | 2015-06-03 | 江苏中天科技股份有限公司 | Self-starting method and self-starting system of energy storage converter |
| CN104682431B (en) * | 2015-02-16 | 2017-04-19 | 江苏中天科技股份有限公司 | Self-starting method and self-starting system of energy storage converter |
| CN106972738A (en) * | 2017-04-28 | 2017-07-21 | 荣信汇科电气技术有限责任公司 | A kind of include can turn off the high potential energy collecting device and method of start-up circuit |
| CN106972738B (en) * | 2017-04-28 | 2023-12-15 | 荣信汇科电气股份有限公司 | High-potential energy taking device and method comprising turn-off starting circuit |
| CN109494776A (en) * | 2018-11-30 | 2019-03-19 | 北京科诺伟业科技股份有限公司 | The grid-connected bidirectional converter of energy-storage system and off-network double mode operation method |
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Address after: The road town of Rudong County in Jiangsu province 226463 in Nantong City, No. 1 Co-patentee after: Institute of Electrical Engineering, Chinese Academy of Sciences Patentee after: JIANGSU ZHONGTIAN TECHNOLOGY Co.,Ltd. Co-patentee after: ZT YUPIN TECHNOLOGY Co.,Ltd. Address before: The road town of Rudong County in Jiangsu province 226463 in Nantong City, No. 1 Co-patentee before: Institute of Electrical Engineering, Chinese Academy of Sciences Patentee before: JIANGSU ZHONGTIAN TECHNOLOGY Co.,Ltd. Co-patentee before: NANTONG YUPIN COMMUNICATION TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20200331 Address after: The road town of Rudong County in Jiangsu province 226463 in Nantong City, No. 1 Co-patentee after: Institute of Electrical Engineering, Chinese Academy of Sciences Patentee after: JIANGSU ZHONGTIAN TECHNOLOGY Co.,Ltd. Co-patentee after: ZHONGTIAN ENERGY STORAGE TECHNOLOGY Co.,Ltd. Address before: The road town of Rudong County in Jiangsu province 226463 in Nantong City, No. 1 Co-patentee before: Institute of Electrical Engineering, Chinese Academy of Sciences Patentee before: JIANGSU ZHONGTIAN TECHNOLOGY Co.,Ltd. Co-patentee before: ZT YUPIN TECHNOLOGY Co.,Ltd. |