CN107612413A - One kind exchange superposition dc source generating means - Google Patents
One kind exchange superposition dc source generating means Download PDFInfo
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- CN107612413A CN107612413A CN201710633657.5A CN201710633657A CN107612413A CN 107612413 A CN107612413 A CN 107612413A CN 201710633657 A CN201710633657 A CN 201710633657A CN 107612413 A CN107612413 A CN 107612413A
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Abstract
The present invention relates to one kind to exchange superposition dc source generating means, including rectification unit, inversion unit, pressure regulator and dc source, the input of rectification unit is used to connect three-phase alternating-current supply, the input of the output end connection inversion unit of rectification unit, the first winding of the output end connection pressure regulator of inversion unit, the secondary winding of pressure regulator is connected with the dc source, and also string is provided with the first feeder ear and the second feeder ear for being used for power supply connection voltage source converter between secondary winding and dc source.In invention, three-phase alternating current adjustable square-wave voltage of forming frequency after rectification unit and inversion unit, the square-wave voltage is changed into High Level AC Voltage after pressure regulator, after the High Level AC Voltage and the direct current of dc source output are overlapped, output voltage amplitude, alternating current-direct current component proportion and the adjustable voltage of frequency are formd, disclosure satisfy that the exchange superposition DC break down voltage test requirements document of voltage source converter.
Description
Technical field
The present invention relates to one kind to exchange superposition dc source generating means, belongs to high voltage and insulation technology field.
Background technology
Technology of HVDC based Voltage Source Converter is transmitted electricity relative to Traditional DC as HVDC Transmission Technology of new generation, have it is active and
Idle independent control, response is fast, harmonic characterisitic is good, the advantages that small is lost, and can be widely applied to asynchronous Power System Interconnection transmission of electricity, distribution
The fields such as the access of the formula energy, urban electricity supply, island with power.
In recent years, the flexible DC power transmission based on voltage source converter achieved fast development in worldwide, electricity
Source Con-verters are the key equipments of flexible DC power transmission, carry out necessary test to the voltage source converter before putting into operation, are anti-
Suffer from the important measures of possible trouble, guarantee power system security and economical operation.
Exchange superposition DC break down voltage experiment is to examine an important tests of voltage source converter insulation characterisitic, current domestic
High voltage power supply be typically only capable to individually export alternating current and direct current or surge voltage, also can directly export exchange superposition direct current
High voltage power supply.Therefore, there is an urgent need to a kind of supply unit that disclosure satisfy that examination voltage source converter insulation characterisitic.In addition,
Consider that the frequency of abroad many national grids is inconsistent with the frequency of our countries, therefore exchange the frequency of superposition dc source
It is able to must adjust.
The content of the invention
It is an object of the invention to provide one kind to exchange superposition dc source generating means, for solving existing supply unit
This technical problem of the exchange superposition DC break down voltage test requirements document of voltage source converter can not be met.
In order to solve the above technical problems, the invention provides one kind to exchange superposition dc source generating means, including rectification
Unit (1), inversion unit (2), pressure regulator and dc source (4), the input of the rectification unit (1) are used to connect three-phase
AC power, the output end of the rectification unit (1) connect the input of the inversion unit (2), the inversion unit (2)
Output end connects the first winding of the pressure regulator, and the secondary winding of the pressure regulator is connected with the dc source (4), described
Also string is provided with the first feeder ear and for the connection voltage source converter that is used to powering between secondary winding and the dc source (4)
Two feeder ears.
Further, it is also associated with overvoltage protection loop (3) between first feeder ear and the second feeder ear.
Further, the output end of the rectification unit (1) is also parallel with filter capacitor branch road.
Further, the dc source (4) includes voltage rectifier and AC voltage adjusting circuit.
Further, the overvoltage protection loop (3) includes IGCT loop and driving circuit, in the IGCT loop
String is provided with IGCT, and string is provided with and the turn on thyristors direction identical diode in the driving circuit；It is described to drive back
The one end on road connects the current input terminal in the IGCT loop, and the other end control of the driving circuit connects the brilliant lock
Pipe.
Further, also string is provided with current-limiting resistance in the driving circuit.
The beneficial effects of the invention are as follows：
Three-phase alternating current adjustable square-wave voltage of forming frequency after rectification unit and inversion unit, square-wave voltage warp
It is changed into High Level AC Voltage after crossing pressure regulator, after the direct current that the High Level AC Voltage exports with dc source is overlapped, forms
Output voltage amplitude, alternating current-direct current component proportion and the adjustable voltage of frequency, it disclosure satisfy that the exchange superposition of voltage source converter
DC break down voltage test requirements document.
Further, it is also associated with over-pressed guarantor between the first feeder ear and the second feeder ear of power generator of the present invention
Loop is protected, can be to being connected to the first feeder ear and the second feeder ear when the output voltage of power generator exceedes expected
Between voltage source converter test product carry out rapid overpressure protection, effectively prevent the phenomenon that voltage source converter test product is burnt out.
Brief description of the drawings
Fig. 1 is the structural representation of present invention exchange superposition dc source generating means；
Fig. 2 is the schematic diagram of exchange superposition dc source generating means output voltage waveforms.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with accompanying drawing and specific implementation
The present invention will be described in further detail for example.
As shown in figure 1, exchange superposition dc source generating means mainly includes rectification unit 1, filter capacitor branch road, inversion
Unit 2, pressure regulator T and dc source 4.Wherein, the input of rectification unit 1 is used to connect three-phase alternating-current supply, rectification unit 1
Output end connection inversion unit 2 input, filter capacitor branch circuit parallel connection is between two output ends of rectification unit 1, inversion
The output end connection pressure regulator T of unit 2 first winding, the first terminals of pressure regulator T secondary winding are formd for supplying
Electrically connect the first feeder ear O1 of voltage source converter, the second terminals of pressure regulator T secondary winding and the one of dc source 4
Individual output end is connected, and another output end of dc source 4 forms the second power supply for connection voltage source converter of powering
Hold O2.
Specifically, rectification unit 1 by three-phase can not control rectifier form, in filter capacitor branch road string be provided with filter capacitor
C1, three-phase main-frequency AC supply voltage form smooth direct current after the uncontrollable bridge rectifier of three-phase and filter capacitor C1
Pressure.Certainly, can also be made up of as other embodiments, rectification unit 1 half-control rectifier or full-controlled rectifier device, due to
It is that rectification unit 1 belongs to prior art that uncontrollable, half control or full-controlled rectifier device, which form rectification circuit, and here is omitted.
Inversion unit 2 forms full bridge inverter and corresponding control drive circuit group by four full control property device IGBT
Into the DC voltage of electric capacity C1 outputs is transformed into square-wave voltage after inversion unit 2 after filtering, and it exports the frequency of square wave
It is adjustable.It is changed into High Level AC Voltage after pressure regulator T from the square-wave voltage that inversion unit 2 exports, because square-wave voltage is low tension,
Therefore greatly simplify the Insulation Problems of inversion unit 2.
Dc source 4 is made up of voltage doubling rectifing circuit and AC voltage adjusting circuit, and the DC voltage amplitude that it is exported is adjustable.By
Prior art is belonged in the concrete structure and connected mode of voltage doubling rectifing circuit and AC voltage adjusting circuit, it is no longer superfluous herein
State.The direct current exported by the High Level AC Voltage that pressure regulator T is exported with dc source 4 is overlapped, and direct current is superimposed in exchange
Can be equal with output amplitude, alternating current-direct current component proportion and frequency between the first feeder ear O1 and the second feeder ear O2 of source generating means
Adjustable voltage.
When needing to carry out voltage source converter exchange superposition DC break down voltage experiment, it is only necessary to which voltage source converter is tried
Product are connected between the first feeder ear O1 and the second feeder ear O2 of exchange superposition dc source generating means.In this implementation
In example, the output voltage waveforms of exchange superposition dc source generating means are as shown in Figure 2.
In addition, in order to carry out rapid overpressure protection to voltage source converter test product, powered in the first feeder ear O1 and second
Overvoltage protection loop 3 is also associated between the O2 of end.Wherein, overvoltage protection loop 3 includes IGCT loop and driving circuit, wherein
String is provided with IGCT in IGCT loop, IGCT it is in a unlimited number, can be adjusted according to being actually needed, can be one,
Can also be multiple.String is provided with breakdown diode and current-limiting resistance in driving circuit, likewise, the number of diode and current-limiting resistance
Mesh is also unlimited, can be one or multiple, the turn on thyristors direction in IGCT loop and two in driving circuit
The channel direction of pole pipe is consistent.The current input terminal in one end connection IGCT loop of driving circuit, the other end of driving circuit
Control connects each IGCT, and the drive circuit need not set current supply circuit.When exchange superposition dc source generating means
When output voltage exceedes desired value, drive circuit can trigger series thyristor, and the conducting of IGCT loop is fast to be carried out to test product
Fast overvoltage protection, prevent product to be tested from being damaged because of overvoltage.
The exchange superposition dc source generating means of the present invention utilizes electronic power switch technology, with reference to voltage doubling rectifing circuit
Technology, can produce that voltage magnitude, alternating current-direct current component proportion and frequency are adjustable to exchange superposition dc source, to voltage
Source transverter carries out insulation pressure test, can not only meet the requirement of insulation pressure test, and convenient to carry out.
Claims (6)
1. one kind exchange superposition dc source generating means, it is characterised in that including rectification unit (1), inversion unit (2), adjust
Depressor and dc source (4), the input of the rectification unit (1) are used to connect three-phase alternating-current supply, the rectification unit
(1) output end connects the input of the inversion unit (2), and the output end of the inversion unit (2) connects the pressure regulator
First winding, the secondary winding of the pressure regulator connects with the dc source (4), the secondary winding and the direct current
Also string is provided with the first feeder ear and the second feeder ear for being used for power supply connection voltage source converter between source (4).
2. it is according to claim 1 exchange superposition dc source generating means, it is characterised in that first feeder ear and
Overvoltage protection loop (3) is also associated between second feeder ear.
3. exchange superposition dc source generating means according to claim 1 or 2, it is characterised in that the rectification unit
(1) output end is also parallel with filter capacitor branch road.
4. exchange superposition dc source generating means according to claim 1 or 2, it is characterised in that the dc source
(4) voltage rectifier and AC voltage adjusting circuit are included.
5. exchange superposition dc source generating means according to claim 2, it is characterised in that the overvoltage protection loop
(3) IGCT loop and driving circuit are included, string is provided with IGCT in the IGCT loop, goes here and there and is provided with the driving circuit
With the turn on thyristors direction identical diode；The electric current that one end of the driving circuit connects the IGCT loop is defeated
Enter end, the other end control of the driving circuit connects the IGCT.
6. exchange superposition dc source generating means according to claim 5, it is characterised in that in the driving circuit also
String is provided with current-limiting resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710633657.5A CN107612413A (en) | 2017-07-28 | 2017-07-28 | One kind exchange superposition dc source generating means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710633657.5A CN107612413A (en) | 2017-07-28 | 2017-07-28 | One kind exchange superposition dc source generating means |
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| Publication Number | Publication Date |
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| CN107612413A true CN107612413A (en) | 2018-01-19 |
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| CN201710633657.5A Pending CN107612413A (en) | 2017-07-28 | 2017-07-28 | One kind exchange superposition dc source generating means |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298218A (en) * | 2018-10-19 | 2019-02-01 | 国网天津市电力公司电力科学研究院 | A kind of DC voltage source high-precision ripple modulating system |
| CN110275124A (en) * | 2018-03-16 | 2019-09-24 | 西安交通大学 | DC stacked line wave generation circuit for the test of MMC submodule capacitor |
| CN111398760A (en) * | 2020-03-18 | 2020-07-10 | 许继集团有限公司 | Alternating current-direct current withstand voltage partial discharge test circuit |
| CN111426862A (en) * | 2020-04-16 | 2020-07-17 | 云南电网有限责任公司电力科学研究院 | Ripple test power supply system |
| CN111781471A (en) * | 2020-07-02 | 2020-10-16 | 国网电力科学研究院武汉南瑞有限责任公司 | Transformer alternating current-direct current composite voltage withstand test system and method |
| CN113219369A (en) * | 2021-05-13 | 2021-08-06 | 广东威恒输变电工程有限公司 | Test method for testing cross-connection performance of cables in laying site |
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| JPH03243171A (en) * | 1990-02-19 | 1991-10-30 | Sanyo Electric Co Ltd | Power conversion device |
| CN101718837A (en) * | 2009-12-02 | 2010-06-02 | 中国电力科学研究院 | AC superposed DC synthesized voltage test power device |
| CN102841040A (en) * | 2012-08-23 | 2012-12-26 | 云南电力试验研究院（集团）有限公司电力研究院 | Alternate current/direct current (AC/DC) superimposed system for detecting particles in gas insulated switchgear (GIS) |
| CN102946202A (en) * | 2012-11-30 | 2013-02-27 | 哈尔滨理工大学 | Composite voltage generation device based on alternating current-direct current superposing |
| CN105978393A (en) * | 2015-11-26 | 2016-09-28 | 中国石油天然气股份有限公司 | High-impedance alternating current and direct current superposition high-voltage power supply device for crude oil electric dehydration |
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2017
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03243171A (en) * | 1990-02-19 | 1991-10-30 | Sanyo Electric Co Ltd | Power conversion device |
| CN101718837A (en) * | 2009-12-02 | 2010-06-02 | 中国电力科学研究院 | AC superposed DC synthesized voltage test power device |
| CN102841040A (en) * | 2012-08-23 | 2012-12-26 | 云南电力试验研究院（集团）有限公司电力研究院 | Alternate current/direct current (AC/DC) superimposed system for detecting particles in gas insulated switchgear (GIS) |
| CN102946202A (en) * | 2012-11-30 | 2013-02-27 | 哈尔滨理工大学 | Composite voltage generation device based on alternating current-direct current superposing |
| CN105978393A (en) * | 2015-11-26 | 2016-09-28 | 中国石油天然气股份有限公司 | High-impedance alternating current and direct current superposition high-voltage power supply device for crude oil electric dehydration |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275124A (en) * | 2018-03-16 | 2019-09-24 | 西安交通大学 | DC stacked line wave generation circuit for the test of MMC submodule capacitor |
| CN110275124B (en) * | 2018-03-16 | 2021-04-13 | 西安交通大学 | Direct-current superposition ripple generation circuit for MMC submodule capacitor test |
| CN109298218A (en) * | 2018-10-19 | 2019-02-01 | 国网天津市电力公司电力科学研究院 | A kind of DC voltage source high-precision ripple modulating system |
| CN111398760A (en) * | 2020-03-18 | 2020-07-10 | 许继集团有限公司 | Alternating current-direct current withstand voltage partial discharge test circuit |
| CN111426862A (en) * | 2020-04-16 | 2020-07-17 | 云南电网有限责任公司电力科学研究院 | Ripple test power supply system |
| CN111781471A (en) * | 2020-07-02 | 2020-10-16 | 国网电力科学研究院武汉南瑞有限责任公司 | Transformer alternating current-direct current composite voltage withstand test system and method |
| CN113219369A (en) * | 2021-05-13 | 2021-08-06 | 广东威恒输变电工程有限公司 | Test method for testing cross-connection performance of cables in laying site |
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Application publication date: 20180119 |