CN107134800A - The bipolar VSC passive control methods and device of a kind of DC transmission system - Google Patents
The bipolar VSC passive control methods and device of a kind of DC transmission system Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The present invention relates to the bipolar VSC passive control methods and device of a kind of DC transmission system, after wherein pole VSC unblocks by controlling inverter side, it is used and determines alternating voltage control, then another pole VSC of control inverter side controls another pole VSC to unlock after entering horizontal lock, lock phase to the above-mentioned wherein pole VSC phases exported.The present invention can realize the two poles of the earth VSC steady unblock, and the two poles of the earth VSC voltage-phase keeps synchronous after unblock, and be same passive network stable power-supplying simultaneously.
Description
Technical field
The invention belongs to technical field of direct current power transmission, and in particular to a kind of bipolar VSC Passive Shape Controls of DC transmission system
Method and device.
Background technology
Line commutation transverter HVDC transmission system (Line Commutated Converter Based High
Voltage Direct Current, LCC-HVDC) it has been widely used in Large Copacity long distance power transmission and asynchronous power network is leaned against
The occasions such as back of the body interconnection, but there is Inverter Station commutation failure, passive system can not be powered, need in running consumption big
The shortcomings of measuring reactive power；And the voltage source converter HVDC transmission system based on all-controlling power electronics device
(Voltage Source Converter Based High Voltage Direct Current, VSC-HVDC) has can be only
Vertical control active power and reactive power, in the absence of commutation failure and the advantages of can be powered to passive system, but it builds compared with LCC
Cost is high, transmission capacity is small.In numerous VSC-HVDC transmission of electricity topologys, modularization multi-level converter DC transmission system
(Modular Multilevel Converter Based High Voltage Direct Current, MMC-HVDC) possesses
Advantages all VSC-HVDC, but due to the shortcomings of it involves great expense, effectively can not handle DC Line Fault, making it unsuitable for using
In long range, bulk power transmission occasion.
In order to integrate the advantage of both DC transmission systems of LCC-HVDC and VSC-HVDC, Hybrid HVDC system should
Transport and give birth to.The rectification side of Hybrid HVDC system uses LCC, and inverter side uses VSC, has given full play to LCC DC power transmission systems
The advantage that system capacity is big, distance is remote and VSC is not present commutation failure and can powered to passive AC system, with larger hair
Exhibition prospect.
Generally, in Hybrid HVDC system, inverter side VSC ends are operable with two kinds of fortune of active mode and passive mode
Under line mode.During active mode, the AC network that VSC terminal modules are connected through carries out active charging；During passive mode,
The DC line that VSC terminal modules are connected through carries out passive charging.After charging complete, VSC is according to corresponding under both of which
Control mode unblock, realize the power transmission of DC transmission system.In the prior art, in October, 2013 the 10th phase of volume 28
《Electrotechnics journal》Periodical has been published entitled《LCC-MMC mixed high-voltage DC transmission systems》Paper, the paper discloses
A kind of control method of both-end monopolar D. C transmission system, provides galvanic current pressure using LCC and completes each submodules of MMC
Electric capacity charging and IGBT unblock.
And when the bipolar VSC of inverter side accesses same passive network in straight-flow system, the direct current provided only with rectification side
Voltage is the mode that the two poles of the earth VSC charges and unlocked, the phase deviation that can have voltage after the two poles of the earth VSC unblocks, when the two poles of the earth VSC's
When voltage-phase deviation is very big, certain impact can be caused to passive network, will cause DC transmission system when impacting serious
It is unable to steady operation.Also, during the mode that the DC voltage for using above-mentioned rectification side to provide charges and unlocked for the two poles of the earth VSC, also
There is the two poles of the earth VSC power coordination control problem.
The content of the invention
It is an object of the invention to provide the bipolar VSC passive control methods and device of a kind of DC transmission system, for solving
Certainly there is the unblock control problem of the bipolar VSC same passive network of straight-flow system access.
In order to solve the above technical problems, the present invention proposes a kind of bipolar VSC passive control methods of DC transmission system, bag
Include following methods scheme：
Method scheme one, comprises the following steps：
1) DC voltage that the first pole VSC and the second pole VSC of inverter side are provided by rectification side carries out passive charging；
2) after the first pole VSC unblocks of control inverter side, to the first pole VSC using alternating voltage control is determined, obtain
First pole VSC three-phase modulations reference voltage, so as to set up net side alternating voltage；The second pole VSC of inverter side is controlled to described
The phase for the net side alternating voltage that first pole VSC is set up controls the second pole VSC to unlock after entering horizontal lock, lock phase.
Method scheme two, on the basis of method scheme one, it is described determine alternating voltage control be：Net side alternating voltage is joined
Examining the difference of value and voltage on line side d axis components, progress is corresponding handles, and obtains the first pole modulation voltage d axle reference values；
To 0, progress is corresponding handles with the differences of voltage on line side q axis components, obtains the first pole modulation voltage q axle reference values, right
The first pole modulation voltage d axles reference value and the first pole modulation voltage q axles reference value carry out Parker's inverse transformation, obtain the first pole
VSC three-phase modulations reference voltage level.
Method scheme three, on the basis of method scheme two, the first pole modulation voltage d axles reference value passes through following formula meter
Obtain：
In formula, Ud1_refFor the first pole modulation voltage d axle reference values, KpFor proportionality coefficient,Join for net side alternating voltage
Examine value Uac_refPerunit value, Uac_dFor voltage on line side d axis components, TiFor integration time constant；
The first pole modulation voltage q axle reference values Uq1_refCalculated and obtained by following formula：
In formula, Uq1_refFor the first pole modulation voltage q axle reference values, KpFor proportionality coefficient, Uac_qFor voltage on line side q axles point
Amount, TiFor integration time constant.
Method scheme four, on the basis of method scheme one, used after the second pole VSC unblock outer shroud for power ring,
Inner ring is the double -loop control of electric current loop.
Method scheme five, on the basis of method scheme four, the bicyclic control that the outer shroud is power ring, inner ring is electric current loop
System is specially：Difference to active power reference value and active power measured value carries out PI controls, obtains interior circular current d axles reference
Value, the difference to reactive power reference qref and reactive power measured value carries out PI controls, obtains interior circular current q axle reference values, described
Interior circular current d axles reference value and the interior circular current q axles reference value pass through inner ring current controller, respectively obtain the modulation of the second pole
Voltage d axles reference value and the second pole modulation voltage q axle reference values, carry out Parker's inverse transformation, obtain the second pole VSC three-phase modulations
Voltage reference value.
To solve the above problems, the present invention also proposes a kind of bipolar VSC Passive Shape Controls device of DC transmission system, including
Following device scheme：
Device scheme one, including charhing unit conciliate lock control unit, wherein：
The direct current that charhing unit is used to provide the first pole VSC and the second pole VSC of inverter side by rectification side is pressed into
The passive charging of row；
After the first pole VSC unblocks of the unblock control unit for controlling inverter side, to the first pole VSC using fixed exchange
Voltage is controlled, and the first pole VSC three-phase modulations reference voltage is obtained, so as to set up net side alternating voltage；Control the of inverter side
Two pole VSC control second pole after entering horizontal lock, lock phase to the phase of the first pole VSC net side alternating voltages set up
VSC is unlocked.
Device scheme two, on the basis of device scheme one, in addition to for net side alternating voltage reference value and net side
The difference of voltage d axis components is handled accordingly, obtains the first pole modulation voltage d axle reference values；To 0 and voltage on line side q axles point
The difference of amount is handled accordingly, obtains the first pole modulation voltage q axle reference values, and the first pole modulation voltage d axles are referred to
Value and the first pole modulation voltage q axles reference value carry out Parker's inverse transformation, obtain the first pole VSC three-phase modulations reference voltage level
Unit.
Device scheme three, on the basis of device scheme two, in addition to computing unit：For first pole modulation voltage
D axles reference value is calculated by following formula and obtained：
In formula, Ud1_refFor the first pole modulation voltage d axle reference values, KpFor proportionality coefficient,Join for net side alternating voltage
Examine value Uac_refPerunit value, Uac_dFor voltage on line side d axis components, TiFor integration time constant；
The first pole modulation voltage q axle reference values Uq1_refCalculated and obtained by following formula：
In formula, Uq1_refFor the first pole modulation voltage q axle reference values, KpFor proportionality coefficient, Uac_qFor voltage on line side q axles point
Amount, TiFor integration time constant.
Device scheme four, it is outer on the basis of device scheme one, in addition to for being used after being unlocked to the second pole VSC
The unit for the double -loop control that ring is power ring, inner ring is electric current loop.
Device scheme five, on the basis of device scheme four, in addition to for active power reference value and active power
The difference of measured value carries out PI controls, obtains interior circular current d axle reference values, to reactive power reference qref and reactive power measured value
Difference carries out PI controls, obtains interior circular current q axle reference values, the interior circular current d axles reference value and the interior circular current q axles reference
Value passes through inner ring current controller, respectively obtains the second pole modulation voltage d axles reference value and the second pole modulation voltage q axles reference
Value, carries out Parker's inverse transformation, obtains the unit of the second pole VSC three-phase modulations voltage reference value.
The beneficial effects of the invention are as follows：After wherein pole VSC unblocks by controlling inverter side, it is used and determines alternating current
Voltage-controlled system, then controls another pole VSC of inverter side to be controlled after entering horizontal lock, lock phase to the above-mentioned wherein pole VSC phases exported
Make another pole VSC unblocks.The present invention can realize the two poles of the earth VSC steady unblock, and the two poles of the earth VSC voltage-phase keeps same after unblock
Step, and be same passive network stable power-supplying simultaneously.
Brief description of the drawings
Fig. 1 is the topology diagram of bipolar passive Hybrid HVDC system；
Fig. 2 is the wherein topology diagram of a pole VSC in bipolar VSC；
Fig. 3 is the bipolar VSC controller principle block diagram of pole 1；
Fig. 4 is the bipolar VSC controller principle block diagram of pole 2.
Embodiment
The embodiment to the present invention is further described below in conjunction with the accompanying drawings.
A kind of embodiment of the bipolar VSC passive control methods of DC transmission system of the present invention：
Bipolar passive Hybrid HVDC system as shown in Figure 1, rectification side uses LCC incoming transport power networks, inverter side
Passive network is accessed using VSC, power is delivered to VSC ends by LCC ends by DC line, and LCC ends DC side string has flat ripple reactance
Device, VSC ends DC side string has a diode, and VSC ends use MMC structures, and transverter is made up of 6 bridge arms of three-phase, each bridge arm by
Bridge arm inductance and quantity identical submodule are constituted, as shown in Fig. 2 submodule uses half-bridge structure, comprising 2 IGBT, 2 it is anti-
Parallel diode and 1 storage capacitor.
For Fig. 1 mixed DC system, the bipolar LCC ends unblock of control rectification side, the stabilization provided using bipolar LCC
DC voltage, be that the pole VSC first unlocked in bipolar VSC (is referred to as pole 1, the pole unlocked afterwards by the pole 1 and pole 2 of inverter side
VSC is referred to as pole 2) submodule in capacitor charged, after charging complete, unlock VSC ends pole 1, pole 1 unlock after using fixed
Alternating voltage is controlled, and sets up the three-phase voltage of VSC ends AC.Because VSC ends pole 1 and pole 2 are connected to same passive network
In, so after now VSC ends pole 1 is unlocked, the existing alternating voltage of its AC, the voltage-phase that 2 pairs of poles 1 of control pole are exported enters
Horizontal lock, the voltage-phase of pole 2 and the voltage-phase of pole 1 are synchronized, then to determine active power controller and fixed idle work(
Rate control mode is unlocked to pole 2.After VSC ends pole 2 is unlocked, the active power and reactive power that can be exported by control pole 2
Value completes the power distribution at the two poles of the earth, realizes the bipolar coordination control of active power and reactive power.
After the charging complete passive by DC side of VSC ends, VSC ends pole 1 is unlocked to use and determines alternating voltage control,
The control process is：
As shown in figure 3, to net side alternating voltage reference value Uac_refPerunit value and voltage on line side d axis components Uac_dDifference
It is controlled, obtains the first pole modulation voltage d axle reference values Ud1_ref, to 0 and voltage on line side q axis components Uac_qDifference controlled
System, obtains the first pole modulation voltage q axle reference values Uq1_ref, Parker's inverse transformation is then carried out, the three-phase modulations voltage of pole 1 is obtained
Reference value Ua1_ref、Ub1_ref、Uc1_ref.Wherein, Uac_refIncreased from 0 with certain slope, so that the net side alternating voltage set up
It is steady to rise.
After VSC ends pole 1 is unlocked, because the two poles of the earth at VSC ends are connected in same passive network, so now VSC ends
The existing alternating voltage of AC of pole 2, the voltage-phase of the lock of control pole 2 phase pole 1, then to determine active power controller and determine nothing
Work(power control mode is unlocked to pole 2, and the control process of pole 2 is：
As shown in figure 4, to active power reference value Pac_refWith active power measured value Pac_measDifference carry out PI controls,
Obtain interior circular current d axle reference values Id_ref, to reactive power reference qref Qac_refWith reactive power measured value Qac_measDifference progress
PI is controlled, and obtains interior circular current q axle reference values Iq_ref, the second pole modulation voltage d axles are respectively obtained by inner ring current controller
Reference value Ud2_refWith the second pole modulation voltage q axle reference values Uq2_ref, carry out the three-phase modulations voltage that Parker's inverse transformation obtains pole 2
Reference value Ua2_ref、Ub2_ref、Uc2_ref.Wherein, Pac_refAnd Qac_refIncrease or reduce with certain elevation rate from 0, so that
The active power of output and reactive power smooth change.
Then, by changing the P of VSC ends pole 2ac_ref、Qac_refThe work(at the two poles of the earth is completed with corresponding elevation rate reference value
Rate is distributed, and realizes the bipolar coordination control of active power and reactive power.In running, if pole 2 is broken down, pole 2 is stopped
Fortune, pole 1 is continued to run with；If pole 1 is broken down, pole 1 is stopped transport, while the controlling tactic switch of pole 2 is controlled simultaneously to determine alternating voltage
Continue to run with.
The present invention sets up DC voltage after being unlocked using rectification side LCC ends, the son by DC line to inverter side VSC ends
Module carries out passive charging, then unlocks VSC ends pole 1, so that VSC ends AC three-phase voltage is set up, and in VSC ends pole 2
AC produces alternating voltage, pole 2 is locked after the voltage-phase of phase pole 1, to determine active power and determine Reactive Power Control
Mode unlocks pole 2.After VSC ends pole 2 is unlocked, the active power and reactive power value that can be exported by control pole 2 complete the two poles of the earth
Power distribution, realize the bipolar coordination control of active power and reactive power.Logic of the present invention is simple, it is easy to Project Realization,
The two poles of the earth VSC steady unblock can be realized, while being same passive network stable power-supplying.
The present invention is used to solve the unblock control problem that the straight-flow system with bipolar VSC accesses same passive network, because
This, control method of the invention is not only applicable to bipolar passive Hybrid HVDC system as shown in Figure 1, i.e. rectification side
Transverter is not limited to LCC or bipolar VSC or other kinds of transverters, as long as the transverter of rectification side can be inversion
Side provides galvanic current pressure.
Bipolar LCC mode is unlocked in the present embodiment to be set as needed, both can be while unlocking bipolar LCC and being
The capacitor charging of VSC ends pole 1 and pole 2, unlocks pole 1 and pole 2 again after charging complete；Can also be using the first unblock opposite end of pole 1
LCC, then the opposite end LCC of pole 2 mode is unlocked, then carry out the unblock of pole 1 and pole 2；Can also be the two of rectification side and inverter side
Level is unlocked respectively, after such as LCC of the unblock opposite end of pole 1, the pole 1 at unblock VSC ends, then unlocks the LCC of the opposite end of pole 2, is finally solved
Lock the pole 2 at VSC ends.
A kind of embodiment of the bipolar VSC Passive Shape Controls device of DC transmission system of the present invention：
Lock control unit is conciliate including charhing unit, wherein, charhing unit is used for the first pole VSC of inverter side and second
The DC voltage that pole VSC is provided by rectification side carries out passive charging；Unblock control unit is used for the first pole for controlling inverter side
After VSC unblocks, to the first pole VSC using alternating voltage control is determined, the first pole VSC three-phase modulations reference voltage is obtained；
Second pole VSC of control inverter side is controlled after entering horizontal lock, lock phase to the phase of the first pole VSC three-phase alternating voltages exported
Make the second pole VSC unblocks.
The bipolar VSC Passive Shape Controls device of signified DC transmission system, is actually based on this hair in above-described embodiment
A kind of computer solution of bright method flow, i.e., a kind of software architecture may apply in current conversion station, said apparatus is
The treatment progress corresponding with method flow.Because the sufficiently clear of the introduction to the above method is complete, and the present embodiment sound
The device of title is actually a kind of software architecture, therefore is no longer described in detail.
Claims (10)
1. the bipolar VSC passive control methods of a kind of DC transmission system, it is characterised in that comprise the following steps：
1) DC voltage that the first pole VSC and the second pole VSC of inverter side are provided by rectification side carries out passive charging；
2) after the first pole VSC unblocks of control inverter side, to the first pole VSC using alternating voltage control is determined, first is obtained
Pole VSC three-phase modulations reference voltage, so as to set up net side alternating voltage；The second pole VSC of inverter side is controlled to described first
The phase for the net side alternating voltage that pole VSC is set up controls the second pole VSC to unlock after entering horizontal lock, lock phase.
2. the bipolar VSC passive control methods of DC transmission system according to claim 1, it is characterised in that described fixed
Alternating voltage is controlled：To the difference of net side alternating voltage reference value and voltage on line side d axis components, progress is corresponding handles, and obtains the
One pole modulation voltage d axle reference values；
To 0, progress is corresponding handles with the differences of voltage on line side q axis components, the first pole modulation voltage q axle reference values is obtained, to described
First pole modulation voltage d axles reference value and the first pole modulation voltage q axles reference value carry out Parker's inverse transformation, obtain the first pole VSC
Three-phase modulations reference voltage level.
3. the bipolar VSC passive control methods of DC transmission system according to claim 2, it is characterised in that described
One pole modulation voltage d axles reference value is calculated by following formula and obtained：
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In formula, Ud1_refFor the first pole modulation voltage d axle reference values, KpFor proportionality coefficient,For net side alternating voltage reference value
Uac_refPerunit value, Uac_dFor voltage on line side d axis components, TiFor integration time constant；
The first pole modulation voltage q axle reference values Uq1_refCalculated and obtained by following formula：
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In formula, Uq1_refFor the first pole modulation voltage q axle reference values, KpFor proportionality coefficient, Uac_qFor voltage on line side q axis components, Ti
For integration time constant.
4. the bipolar VSC passive control methods of DC transmission system according to claim 1, it is characterised in that described
Outer shroud is used after two pole VSC unblocks for double -loop control that power ring, inner ring are electric current loop.
5. the bipolar VSC passive control methods of DC transmission system according to claim 4, it is characterised in that described outer
The double -loop control that ring is power ring, inner ring is electric current loop is specially：To the difference of active power reference value and active power measured value
PI controls are carried out, interior circular current d axle reference values are obtained, the difference to reactive power reference qref and reactive power measured value carries out PI controls
System, obtains interior circular current q axle reference values, the interior circular current d axles reference value and the interior circular current q axle reference values pass through inner ring
Current controller, respectively obtains the second pole modulation voltage d axles reference value and the second pole modulation voltage q axle reference values, carries out Parker
Inverse transformation, obtains the second pole VSC three-phase modulations voltage reference value.
6. a kind of bipolar VSC Passive Shape Controls device of DC transmission system, it is characterised in that including：
Charhing unit：Nothing is carried out for the DC voltages provided by rectification side of the first pole VSC and the second pole VSC to inverter side
Charge in source；
Unlock control unit：After the first pole VSC for controlling inverter side is unlocked, the first pole VSC is used and determines alternating current
Voltage-controlled system, obtains the first pole VSC three-phase modulations reference voltage, so as to set up net side alternating voltage；Control the second of inverter side
Pole VSC controls the second pole VSC after entering horizontal lock, lock phase to the phase of the first pole VSC net side alternating voltages set up
Unblock.
7. the bipolar VSC Passive Shape Controls device of DC transmission system according to claim 6, it is characterised in that also include
For the difference to net side alternating voltage reference value and voltage on line side d axis components, progresss is corresponding handles, and obtains the modulation of the first pole electric
Press d axle reference values；
To 0, progress is corresponding handles with the differences of voltage on line side q axis components, the first pole modulation voltage q axle reference values is obtained, to described
First pole modulation voltage d axles reference value and the first pole modulation voltage q axles reference value carry out Parker's inverse transformation, obtain the first pole VSC
Three-phase modulations reference voltage level unit.
8. the bipolar VSC Passive Shape Controls device of DC transmission system according to claim 7, it is characterised in that also include
Computing unit：Calculated and obtained by following formula for the first pole modulation voltage d axles reference value：
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In formula, Ud1_refFor the first pole modulation voltage d axle reference values, KpFor proportionality coefficient,For net side alternating voltage reference value
Uac_refPerunit value, Uac_dFor voltage on line side d axis components, TiFor integration time constant；
The first pole modulation voltage q axle reference values Uq1_refCalculated and obtained by following formula：
<mrow>
<msub>
<mi>U</mi>
<mrow>
<mi>q</mi>
<mn>1</mn>
<mo>_</mo>
<mi>r</mi>
<mi>e</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>=</mo>
<msub>
<mi>K</mi>
<mi>p</mi>
</msub>
<mrow>
<mo>(</mo>
<mn>0</mn>
<mo>-</mo>
<msub>
<mi>U</mi>
<mrow>
<mi>a</mi>
<mi>c</mi>
<mo>_</mo>
<mi>q</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>+</mo>
<mo>&Integral;</mo>
<mfrac>
<msub>
<mi>K</mi>
<mi>p</mi>
</msub>
<msub>
<mi>T</mi>
<mi>i</mi>
</msub>
</mfrac>
<mrow>
<mo>(</mo>
<mn>0</mn>
<mo>-</mo>
<msub>
<mi>U</mi>
<mrow>
<mi>a</mi>
<mi>c</mi>
<mo>_</mo>
<mi>q</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mi>d</mi>
<mi>t</mi>
</mrow>
In formula, Uq1_refFor the first pole modulation voltage q axle reference values, KpFor proportionality coefficient, Uac_qFor voltage on line side q axis components, Ti
For integration time constant.
9. the bipolar VSC Passive Shape Controls device of DC transmission system according to claim 6, it is characterised in that also include
For using outer shroud after being unlocked to the second pole VSC for the unit of double -loop control that power ring, inner ring are electric current loop.
10. the bipolar VSC Passive Shape Controls device of DC transmission system according to claim 9, it is characterised in that also include
PI controls are carried out for the difference to active power reference value and active power measured value, interior circular current d axle reference values are obtained, to nothing
Work(value and power reference and the difference of reactive power measured value carry out PI controls, obtain interior circular current q axle reference values, the interior circular current
D axles reference value and the interior circular current q axles reference value pass through inner ring current controller, respectively obtain the second pole modulation voltage d axles
Reference value and the second pole modulation voltage q axle reference values, carry out Parker's inverse transformation, obtain the second pole VSC three-phase modulations voltage ginseng
Examine the unit of value.
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| CN201710287488.4A CN107134800B (en) | 2017-04-27 | 2017-04-27 | Bipolar VSC passive control method and device of direct current transmission system |
| PCT/CN2017/114074 WO2018196381A1 (en) | 2017-04-27 | 2017-11-30 | Passive control method, device, and storage medium for bipolar voltage source converter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110784A (en) * | 2018-01-10 | 2018-06-01 | 重庆大学 | Reduce the control method that mixing double-fed enters operation risk under straight-flow system electric network fault |
| CN108418221A (en) * | 2018-03-07 | 2018-08-17 | 许继电气股份有限公司 | A kind of alternating voltage control method and device applied to flexible direct current power transmission system |
| WO2018196381A1 (en) * | 2017-04-27 | 2018-11-01 | 许继集团有限公司 | Passive control method, device, and storage medium for bipolar voltage source converter |
| CN111418127A (en) * | 2017-10-06 | 2020-07-14 | 通用电器技术有限公司 | Converter scheme |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362662B (en) * | 2014-11-26 | 2016-08-24 | 湖北工业大学 | A kind of LCC-VSC type Hybrid HVDC system topology and startup method |
| CN104485683B (en) * | 2014-12-23 | 2018-07-06 | 南京南瑞继保电气有限公司 | A kind of isolated island turns networking method |
| US9621063B2 (en) * | 2015-03-11 | 2017-04-11 | DRS Consolidated Controls, Inc. | Reference current generation in bidirectional power converter |
| CN104821596A (en) * | 2015-05-21 | 2015-08-05 | 国家电网公司 | Internal model control-based hybrid DC transmission system topology and control method |
| CN105429165B (en) * | 2015-12-23 | 2018-10-26 | 湖北工业大学 | A kind of multiterminal Hybrid HVDC system topological and control method to the power supply of more drop point passive networks |
| CN107134800B (en) * | 2017-04-27 | 2019-12-24 | 许继电气股份有限公司 | Bipolar VSC passive control method and device of direct current transmission system |
-
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Non-Patent Citations (2)
| Title |
|---|
| 余瑜等: "《向无源网络供电的多端混合直流输电***小信号模型及解耦控制》", 《中国电机工程学报》 * |
| 胡文旺等: "《厦门柔性直流输电工程换流阀充电触发无源逆变试验研究》", 《中国电力》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018196381A1 (en) * | 2017-04-27 | 2018-11-01 | 许继集团有限公司 | Passive control method, device, and storage medium for bipolar voltage source converter |
| CN111418127A (en) * | 2017-10-06 | 2020-07-14 | 通用电器技术有限公司 | Converter scheme |
| CN111418127B (en) * | 2017-10-06 | 2023-09-05 | 通用电器技术有限公司 | Converter structure and method of operation |
| CN108110784A (en) * | 2018-01-10 | 2018-06-01 | 重庆大学 | Reduce the control method that mixing double-fed enters operation risk under straight-flow system electric network fault |
| CN108418221A (en) * | 2018-03-07 | 2018-08-17 | 许继电气股份有限公司 | A kind of alternating voltage control method and device applied to flexible direct current power transmission system |
| CN108418221B (en) * | 2018-03-07 | 2020-01-10 | 许继电气股份有限公司 | Alternating current voltage control method and device applied to flexible direct current transmission system |
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| CN107134800B (en) | 2019-12-24 |
| WO2018196381A1 (en) | 2018-11-01 |
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