CN106787898A - Overhaul power output device - Google Patents
Overhaul power output device Download PDFInfo
- Publication number
- CN106787898A CN106787898A CN201611094432.9A CN201611094432A CN106787898A CN 106787898 A CN106787898 A CN 106787898A CN 201611094432 A CN201611094432 A CN 201611094432A CN 106787898 A CN106787898 A CN 106787898A
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- current voltage
- output
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- 238000012423 maintenance Methods 0.000 claims abstract description 17
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 20
- 238000010586 diagram Methods 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000005284 excitation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention provides a maintenance power output device, comprising: the power supply circuit is used for providing 12V direct current voltage as initial voltage; the push-pull type booster circuit is used for converting the 12V direct-current voltage output by the power supply circuit into 110V direct-current voltage and outputting the 110V direct-current voltage; the boost chopper circuit is used for converting the 110V direct-current voltage output by the push-pull boost circuit into 345V direct-current voltage; and the inverter circuit is used for converting the 345V direct-current voltage boosted by the boost chopper circuit into 380V alternating-current voltage and outputting the voltage. The invention can provide 3 voltage levels of DC12V, DC110V and AC380V as output, can meet the construction load requirement of a transformer substation of more than 90 percent, and is safe and flexible to use; the link of leading and connecting cables in a long distance is avoided, the start time of construction operation is shortened, and the risk of power utilization override tripping caused by leading and connecting maintenance power supplies is also avoided.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to a maintenance power supply output device.
Background
In recent years, with the increase of technical improvement and repair projects in each field in a substation, the number of inbound construction projects has increased, and inspection power sources are frequently used at various sites. The mode of obtaining the maintenance power generally uses the slave station in the maintenance case to draw and connect the cable as the main, has following drawback:
on one hand, the position of an overhauling power box arranged in the station is limited and fixed, and the overhauling power box cannot cover all places in the station, and the power supply in the box is often required to be led by a long-distance cable, so that inconvenience is brought to field construction. Especially, when the construction site is located in a remote location such as a transformer substation roof, an enclosure and the like, it is very difficult to lead the power supply.
On the other hand, by taking the experience of using the maintenance power supply safety accident by a construction unit outside a transformer substation which occurs historically as a reference, the reason is that the cable discharge is caused by the induction voltage generated by the too close distance between the long-distance cable leading to the maintenance power supply and the transformer incoming line. This shows that the long-distance cable leading the overhaul power supply is easy to generate induced voltage with other electrified equipment, and generates safety risk; additionally, the dragging, twisting, and insulation damage of the cable may also pose a personal and equipment safety risk at the construction site.
Finally, the switches in part of old-fashioned maintenance power supply boxes have risks of insulation damage and failure of leakage protection functions, and once a short-circuit fault occurs in a construction site, the condition of override tripping of the switches in the boxes and even the station power incoming line switches is caused, so that the station power buses face the risk of voltage loss.
Disclosure of Invention
The invention aims to solve the technical problem of providing a maintenance power output device which is simple in structure, flexible in leading and connecting and reliable in operation.
In order to solve the above technical problem, the present invention provides an inspection power output apparatus, including:
the power supply circuit is used for providing 12V direct current voltage as initial voltage;
the push-pull type booster circuit is used for converting the 12V direct-current voltage output by the power supply circuit into 110V direct-current voltage and outputting the 110V direct-current voltage;
the boost chopper circuit is used for converting the 110V direct-current voltage output by the push-pull boost circuit into 345V direct-current voltage;
and the inverter circuit is used for converting the 345V direct-current voltage boosted by the boost chopper circuit into 380V alternating-current voltage and outputting the voltage.
The power supply circuit comprises two groups of lithium iron phosphate storage batteries which are connected in parallel, and each group is formed by connecting 4 lithium iron phosphate storage batteries with rated voltage of 3V in series.
The power supply circuit is connected with 100A fuses in series in the front and the back, and the fuses are used for fusing to protect the storage battery when the output current exceeds 100A.
Wherein, the 12V direct current voltage is led to the output of a KM1 contactor.
Wherein, the push-pull boost circuit includes:
the push-pull type boost conversion circuit further comprises a switch component MOS tube, a high-frequency transformer and a first PWM (pulse width modulation) modulation circuit, and is used for converting 12V direct-current voltage output by the power supply circuit into high-frequency square wave alternating-current voltage through the alternate turn-off of the switch component MOS tube;
and the single-phase bridge type fully-controlled rectifying circuit is used for rectifying the high-frequency square wave alternating voltage into 110V direct-current square wave voltage.
Wherein the push-pull boost circuit further comprises:
and the LC absorption network is composed of an inductor and a capacitor and is used for inhibiting the voltage peak of the collector of the MOS transistor and outputting the 110V direct current square wave voltage through the capacitor.
Wherein the 110V direct current voltage is led to the switch output of the KM2 contactor.
The boost chopper circuit comprises an inductor, an MOS (metal oxide semiconductor) tube, a diode and a capacitor.
Wherein, the inverter circuit includes:
the three-phase voltage type inverter circuit further comprises an IGBT (insulated gate bipolar transistor), a diode and a second PWM (pulse width modulation) modulation circuit, and is used for boosting and inverting the 345V direct-current voltage output by the boosting chopper circuit to 380V alternating-current voltage and leading the voltage to an isolation transformer.
Wherein, inverter circuit still includes:
and the isolation transformer is used for leading the 380V alternating voltage to be output by the KM3 switch through an output switch 3 ZK.
The embodiment of the invention has the beneficial effects that:
the invention can provide 3 voltage levels of DC12V, DC110V and AC380V as output, can meet the construction load requirement of a transformer substation of more than 90 percent, and is safe and flexible to use;
the invention avoids the link of leading and connecting the cable in a long distance, shortens the start time of construction operation: at present, as the access of a temporary power supply in a transformer substation is required by regulations, procedures such as switch characteristic testing, signature of managers and the like must be performed to ensure safe operation, and meanwhile, the start-up time of construction operation is prolonged, and the use of the device avoids the link of leading cables, so that the start-up time is shortened, and the operation efficiency is improved; in addition, the risk of power utilization override tripping caused by the leading connection of a maintenance power supply is avoided;
the device is a movable device, so the device can be placed along with a construction site, and the device can be used for supplying power no matter the construction site is positioned at a high top of a main control building or remote places such as a transformer substation enclosure, a gate and the like, and is flexible and convenient;
the device provided by the invention has the advantages of simple loop, portability, easiness in carrying, low failure rate of devices and higher operation reliability, can be used as powerful supplement for power supply of a fixed type maintenance box in a transformer substation, overcomes the defects of the traditional mode, improves the safety level of a construction site, and ensures the reliable operation of a power supply for the substation;
the invention can be popularized to occasions where the common civil power industry needs to use the mobile power supply with the voltage level, and has wide application and popularization values.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a block diagram of a structure of a maintenance power output apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a specific structure of a power supply circuit according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a specific structure of the push-pull boost circuit according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a specific structure of the boost chopper circuit in the embodiment of the present invention.
Fig. 5 is a schematic diagram of a specific structure of an inverter circuit according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a maintenance power output device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced.
Referring to fig. 1, an embodiment of the invention provides a maintenance power output apparatus, including:
the power supply circuit is used for providing 12V direct current voltage as initial voltage;
the push-pull type booster circuit is used for converting the 12V direct-current voltage output by the power supply circuit into 110V direct-current voltage and outputting the 110V direct-current voltage;
the boost chopper circuit is used for converting the 110V direct-current voltage output by the push-pull boost circuit into 345V direct-current voltage;
and the inverter circuit is used for converting the 345V direct-current voltage boosted by the boost chopper circuit into 380V alternating-current voltage and outputting the voltage.
That is, the inspection power output device of the embodiment includes 3 voltage conversion circuits, and provides 3 output voltages. The power supply circuit provides DC12V voltage as initial voltage (first output voltage), and because most DC loads in the current substation have DC110V voltage class and AC380V voltage class, the push-pull type voltage boost circuit uses DC110V as second output voltage to supply most DC loads and PWM circuit power in all loops of the device. The boost chopper circuit converts the 110V direct-current voltage into 345V direct-current voltage as the input of the inverter circuit, and the inverter circuit converts the 345V direct-current voltage into 380V alternating-current voltage as the third output voltage so as to meet the requirements of most alternating-current loads.
Referring to fig. 2, to ensure reliability, the power supply circuit includes two sets of lithium iron phosphate batteries connected in parallel, and each set is formed by connecting 4 lithium iron phosphate batteries in series. The rated capacity of each battery monomer is 100 ampere-hours (Ah), the rated voltage is DC 3V, and the DC12V voltage can be stably output through the manual output switch 1ZK after the battery monomers are connected in series. Compared with the traditional lead-acid storage battery, the energy ratio of the lithium iron phosphate storage battery is 4-5 times of that of the traditional lead-acid storage battery, and the lithium iron phosphate storage battery has the advantages of small volume and light weight; the fuse R1-R4 of 100A is connected in series in front of and behind the storage battery pack, and when the output current exceeds 100A, the fuse fuses to protect the storage battery pack; a first output voltage (DC 12V) was obtained by connecting the DC12V voltage to a KM1 contactor.
The push-pull type booster circuit takes DC12V output by a power supply circuit as the voltage input of the circuit, and the conversion from DC12V to DC110V is completed. In the push-pull boost circuit in this embodiment, as shown in fig. 3, the switching devices MOS Q1 and Q2, the high-frequency transformer T1, and the PWM modulation circuit constitute a push-pull boost conversion circuit, and the input voltage DC12V is converted into a high-frequency square wave ac voltage by alternately turning off the switching devices MOS Q1 and Q2. The diodes D1-D4 form a single-phase bridge type fully-controlled rectifying circuit, and rectify the high-frequency square wave alternating current voltage into direct current square wave voltage DC 110V. The L1 and the C6 form an LC absorption network for suppressing the peak of the collector voltage of the MOS transistor. A second output voltage can be obtained by outputting a high-frequency square-wave voltage DC110V through C6 and leading the DC110V voltage to a KM2 contactor switch.
The principle of the circuit is as follows:
(1) when t is more than or equal to 0 and less than or equal to t1, Q1 is turned on, Q2 is turned off, and the following steps are provided:
（1）
（2）
wherein N2 is the number of turns of W2.
(2) When t is more than or equal to t2 at t1, Q1 and Q2 are cut off.
(3) When t is more than or equal to t3 at t2, Q1 is cut off, Q2 is turned on, and the following steps are provided:
（3）
therefore, it is
(4) When t is more than or equal to t4 at t3, Q1 and Q2 are cut off.
Thus, the output voltage U3The alternating current square wave with the amplitude is rectified by a full bridge to obtain the high-frequency square wave voltage with the amplitude. The regulation of the effective value of the output voltage is achieved by regulating the duty ratio of the power switches Q1 and Q2.
Referring to fig. 4, the boost chopper circuit includes an inductor L2, a MOS transistor V3, a diode D1, and a capacitor C7, which together form a boost DC/DC converter for boosting DC110V to approximately DC 345V.
The circuit principle is as follows:
when the MOS transistor V3 is conducted, the input voltage UiThe voltage is applied to an inductor L2, and an inductor L2 is controlled by an input voltage UiDuring excitation and conduction, the increment of magnetic flux is as follows; when the switch is turned off, the diode is turned on and the voltage (U) is applied due to the continuous inductor currento-Ui) The current is applied to the inductor L2 in the opposite direction to the direction when the switch is on, the inductor L2 is demagnetized, and the amount of flux reduction during the off period of the switch is set to. In a steady state, if the amount of increase and decrease in the magnetic flux of the inductor are equal, the voltage conversion ratio of the boost converter is less than 1. Since the transformation ratio is less than 1, the output voltage is always higher than the input voltage, i.e. the boost converter is used.
Wherein,
therefore, can be adjusted by adjusting ton+toffAnd toffTo regulate the output voltage Uo。
In order to accurately obtain the output of the subsequent inverter circuit with the amplitude of AC380V, in the boost chopper circuit, the original input voltage DC110V may be boosted to DC345V as the input of the subsequent inverter circuit.
Referring to fig. 5 again, the inverter circuit inputs the DC345V voltage outputted from the boost chopper circuit as the voltage of the inverter circuit. IGBT tubes BG1-BG6, diodes Q5-Q10 and a PWM modulation circuit form a three-phase voltage type inverter circuit, and the three-phase voltage type inverter circuit boosts and inverts DC345V to AC380V to be connected to an isolation transformer T2. The output voltage AC380V of the isolation transformer T2 is connected to the KM3 switch through the output switch 3ZK, and a third output voltage can be obtained.
As can be seen from the above description, the implementation of the embodiment of the present invention has the following beneficial effects:
the invention can provide 3 voltage levels of DC12V, DC110V and AC380V as output, can meet the construction load requirement of a transformer substation of more than 90 percent, and is safe and flexible to use;
the invention avoids the link of leading and connecting the cable in a long distance, shortens the start time of construction operation: at present, as the access of a temporary power supply in a transformer substation is required by regulations, procedures such as switch characteristic testing, signature of managers and the like must be performed to ensure safe operation, and meanwhile, the start-up time of construction operation is prolonged, and the use of the device avoids the link of leading cables, so that the start-up time is shortened, and the operation efficiency is improved; in addition, the risk of power utilization override tripping caused by the leading connection of a maintenance power supply is avoided;
the device is a movable device, so the device can be placed along with a construction site, and the device can be used for supplying power no matter the construction site is positioned at a high top of a main control building or remote places such as a transformer substation enclosure, a gate and the like, and is flexible and convenient;
the device provided by the invention has the advantages of simple loop, portability, easiness in carrying, low failure rate of devices and higher operation reliability, can be used as powerful supplement for power supply of a fixed type maintenance box in a transformer substation, overcomes the defects of the traditional mode, improves the safety level of a construction site, and ensures the reliable operation of a power supply for the substation;
the invention can be popularized to occasions where the common civil power industry needs to use the mobile power supply with the voltage level, and has wide application and popularization values.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. An inspection power output apparatus, comprising:
the power supply circuit is used for providing 12V direct current voltage as initial voltage;
the push-pull type booster circuit is used for converting the 12V direct-current voltage output by the power supply circuit into 110V direct-current voltage and outputting the 110V direct-current voltage;
the boost chopper circuit is used for converting the 110V direct-current voltage output by the push-pull boost circuit into 345V direct-current voltage;
and the inverter circuit is used for converting the 345V direct-current voltage boosted by the boost chopper circuit into 380V alternating-current voltage and outputting the voltage.
2. The maintenance power output device of claim 1, wherein the power supply circuit comprises two sets of lithium iron phosphate storage batteries connected in parallel, each set being formed by connecting 4 lithium iron phosphate storage batteries with a rated voltage of 3V in series.
3. Service power output device according to claim 2, characterized in that the power supply circuit is connected in series with a 100A fuse (R1-R4) in front and behind for fusing to protect the battery when the output current exceeds 100A.
4. The service power output device of claim 2, wherein the 12V DC voltage is directed to the KM1 contactor output.
5. The service power output device of claim 1, wherein the push-pull boost circuit comprises:
the push-pull type boost conversion circuit further comprises switching element MOS (Q1, Q2), a high-frequency transformer (T1) and a first PWM (pulse width modulation) modulation circuit, and is used for converting the 12V direct-current voltage output by the power supply circuit into high-frequency square-wave alternating-current voltage through the alternate turn-off of the switching element MOS (Q1, Q2);
and the single-phase bridge type fully-controlled rectifying circuit is used for rectifying the high-frequency square wave alternating voltage into 110V direct-current square wave voltage.
6. The service power output device of claim 5, wherein the push-pull boost circuit further comprises:
an LC absorption network consisting of an inductor (L1) and a capacitor (C6) is used for suppressing the peak of the collector voltage of the MOS transistor and outputting the 110V direct current square wave voltage through the capacitor (C6).
7. The service power output device of claim 6, wherein the 110V DC voltage is directed to a KM2 contactor switch output.
8. The service power output apparatus according to claim 1, wherein the boost chopper circuit includes an inductor (L2), a MOS transistor (V3), a diode (D1), and a capacitor (C7).
9. The service power output apparatus of claim 1, wherein the inverter circuit comprises:
the three-phase voltage type inverter circuit further comprises IGBT tubes (BG 1-BG 6), diodes (Q5-Q10) and a second PWM modulation circuit, and is used for boosting and inverting 345V direct-current voltage output by the boosting chopper circuit to 380V alternating-current voltage and leading the voltage to an isolation transformer (T2).
10. The service power output apparatus of claim 9, wherein the inverter circuit further comprises:
and the isolation transformer (T2) is used for leading the 380V alternating voltage to the KM3 switch output through the output switch 3 ZK.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611094432.9A CN106787898A (en) | 2016-12-02 | 2016-12-02 | Overhaul power output device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611094432.9A CN106787898A (en) | 2016-12-02 | 2016-12-02 | Overhaul power output device |
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| Publication Number | Publication Date |
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| CN106787898A true CN106787898A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611094432.9A Pending CN106787898A (en) | 2016-12-02 | 2016-12-02 | Overhaul power output device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2577710A (en) * | 2018-10-03 | 2020-04-08 | Ttp Ventus Ltd | Methods and devices for driving a piezoelectric pump |
| US11828374B2 (en) | 2018-12-07 | 2023-11-28 | Ttp Ventus Ltd. | Valve |
| US11841094B2 (en) | 2018-12-07 | 2023-12-12 | Ttp Ventus Ltd. | Valve |
| US11933287B2 (en) | 2020-08-10 | 2024-03-19 | Ttp Ventus Ltd. | Pump for a microfluidic device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951168A (en) * | 2010-09-16 | 2011-01-19 | 上海交通大学 | Alternating current (AC) converter for converting high voltage to low voltage |
| CN206461533U (en) * | 2016-12-02 | 2017-09-01 | 深圳供电局有限公司 | Overhaul power output device |
-
2016
- 2016-12-02 CN CN201611094432.9A patent/CN106787898A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951168A (en) * | 2010-09-16 | 2011-01-19 | 上海交通大学 | Alternating current (AC) converter for converting high voltage to low voltage |
| CN206461533U (en) * | 2016-12-02 | 2017-09-01 | 深圳供电局有限公司 | Overhaul power output device |
Non-Patent Citations (1)
| Title |
|---|
| 谭常清;何安清;张伟先;: "交流传动电力机车检修用逆变电源的研制" * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2577710A (en) * | 2018-10-03 | 2020-04-08 | Ttp Ventus Ltd | Methods and devices for driving a piezoelectric pump |
| GB2577710B (en) * | 2018-10-03 | 2022-12-14 | Lee Ventus Ltd | Methods and devices for driving a piezoelectric pump |
| US11835037B2 (en) | 2018-10-03 | 2023-12-05 | Ttp Ventus Ltd. | Methods and devices for driving a piezoelectric pump |
| US11828374B2 (en) | 2018-12-07 | 2023-11-28 | Ttp Ventus Ltd. | Valve |
| US11841094B2 (en) | 2018-12-07 | 2023-12-12 | Ttp Ventus Ltd. | Valve |
| US11933287B2 (en) | 2020-08-10 | 2024-03-19 | Ttp Ventus Ltd. | Pump for a microfluidic device |
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Application publication date: 20170531 |