CN206920526U - A kind of multiterminal element test system - Google Patents

A kind of multiterminal element test system Download PDF

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Publication number
CN206920526U
CN206920526U CN201720411498.XU CN201720411498U CN206920526U CN 206920526 U CN206920526 U CN 206920526U CN 201720411498 U CN201720411498 U CN 201720411498U CN 206920526 U CN206920526 U CN 206920526U
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China
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receiving
current conversion
sending
vsc
power
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赵利刚
甄鸿越
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Research Institute of Southern Power Grid Co Ltd
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Power Grid Technology Research Center of China Southern Power Grid Co Ltd
Research Institute of Southern Power Grid Co Ltd
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Abstract

The utility model provides a kind of multiterminal element test system, is related to high-voltage dc transmission electrical domain, and the characteristic of multi-terminal HVDC transmission unit can be tested.The multiterminal element test system includes multi-terminal HVDC transmission unit and adjustment unit;Multi-terminal HVDC transmission unit includes sending end equivalent power supply, sending end VSC types current conversion station, i receiving end VSC types current conversion station and i receiving end equivalent power supply;Sending end VSC type current conversion station inputs are connected with sending end equivalent power supply, output end is connected with the input of the 1st receiving end VSC type current conversion station, i-th of receiving end VSC type current conversion station input is connected with the output end of the i-th 1 receiving end VSC type current conversion stations, and i receiving end VSC type current conversion stations output end is also connected one by one with i receiving end equivalent power supply;Adjustment unit is connected with sending end VSC types current conversion station and/or at least one receiving end VSC type current conversion stations.Above-mentioned multiterminal element test system is used to test the characteristic of multi-terminal HVDC transmission unit.

Description

A kind of multiterminal element test system
Technical field
It the utility model is related to high-voltage dc transmission electrical domain, more particularly to a kind of multiterminal element test system.
Background technology
D.C. high voltage transmission has obtained more and more extensive answer as a kind of electrical energy transportation mode in modern power systems With.Interconnected between large regional grid by direct current transportation, be advantageously implemented the asynchronous operation between large regional grid with isolating, can Overcome stable problem caused by the excessive AC electric power systems long range interconnection of capacity, and then improve the dynamic product of large regional grid Matter and the stability for improving large regional grid.Traditional direct current transportation is mostly double ended system, is only capable of realizing point-to-point direct current Power transmits, when using direct current interconnection between multiple AC systems, it is necessary to which a plurality of DC power transmission line, investment will be significantly greatly increased in this Cost and operating cost.In this case, multi-terminal direct current transmission system is arisen at the historic moment.
For at present, because multi-terminal direct current transmission system is a kind of newer direct current transportation mode, then to multiterminal element The characteristic of transmission system carries out deep analysis and research is necessary.
Utility model content
The utility model provides a kind of multiterminal element test system, and the characteristic of multi-terminal HVDC transmission unit can be surveyed Examination.
To reach above-mentioned purpose, the utility model adopts the following technical scheme that:
The utility model provides a kind of multiterminal element test system, and the multiterminal element test system includes multiterminal element The adjustment unit of power transmission unit and the operational factor for adjusting the multi-terminal HVDC transmission unit;The multi-terminal HVDC transmission Unit includes sending end equivalent power supply, sending end VSC types current conversion station, i receiving end VSC types current conversion station and i receiving end equivalent power supply;Its In, the input of the sending end VSC type current conversion stations is connected with the sending end equivalent power supply, the sending end VSC type current conversion stations it is defeated Go out end with the input of the 1st receiving end VSC type current conversion station to be connected, the input of i-th receiving end VSC type current conversion station and the i-th -1 The output end of receiving end VSC type current conversion stations is connected, the output end of i receiving end VSC type current conversion station also with i receiving end equivalent power supply one by one It is corresponding to be connected, i >=2;The adjustment unit and the sending end VSC types current conversion station and/or at least one receiving end VSC types current conversion station phase Even.
In multiterminal element test system provided by the utility model, multi-terminal HVDC transmission unit is specifically included for real Sending end equivalent power supply, sending end VSC types current conversion station, i receiving end VSC types current conversion station and the i receiving end equivalent power supply of existing direct current transportation, Adjustment unit is connected with sending end VSC types current conversion station and/or at least one receiving end VSC type current conversion stations, and this makes it possible to utilize regulation Unit is by adjusting the operational factor of multi-terminal HVDC transmission unit, so as to test multi-terminal HVDC transmission unit in different operational factors Under characteristic, and then realize deep analysis and research are carried out to multi-terminal HVDC transmission unit.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work Under, other accompanying drawings can also be obtained according to these accompanying drawings.
The structural representation one for the multiterminal element test system that Fig. 1 is provided by the utility model embodiment;
The structural representation two for the multiterminal element test system that Fig. 2 is provided by the utility model embodiment;
The structural representation three for the multiterminal element test system that Fig. 3 is provided by the utility model embodiment;
The structural representation four for the multiterminal element test system that Fig. 4 is provided by the utility model embodiment;
The structural representation five for the multiterminal element test system that Fig. 5 is provided by the utility model embodiment;
The structural representation six for the multiterminal element test system that Fig. 6 is provided by the utility model embodiment;
The structural representation seven for the multiterminal element test system that Fig. 7 is provided by the utility model embodiment.
Description of reference numerals:
1- sending end equivalent power supplies;2- sending end VSC type current conversion stations;
3- receiving end VSC type current conversion stations;4- receiving end equivalent power supplies;
51- sending ends determine direct current voltage regulator;52- receiving ends determine dc power adjuster;
53- receiving ends determine direct current voltage regulator;54- sending ends determine dc power adjuster;
61- sending end control model adjusters;62 receiving end control model adjusters;
71- sending end power governors;72- receiving end power governors;
8- impedance regulators;9- sending end direct current protecting devices;
10- receiving end direct current protecting devices.
Embodiment
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with this practicality Accompanying drawing in new embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described.Obviously, institute The embodiment of description is only the utility model part of the embodiment, rather than whole embodiments.Based in the utility model Embodiment, all other implementation that those of ordinary skill in the art are obtained on the premise of creative work is not made Example, belong to the scope of the utility model protection.
A kind of multiterminal element test system is present embodiments provided, the multiterminal element test system includes multi-terminal HVDC transmission The adjustment unit of unit and the operational factor for adjusting multi-terminal HVDC transmission unit.As shown in figure 1, multi-terminal HVDC transmission list Member specifically includes sending end equivalent power supply 1, sending end VSC types current conversion station 2, i receiving end VSC types current conversion station 3 and i receiving end equivalent power supply 4。
Wherein, the input of sending end VSC types current conversion station 2 is connected with sending end equivalent power supply 1, sending end VSC types current conversion station 2 it is defeated Go out end with the input of the 1st receiving end VSC types current conversion station 3 to be connected, the input and i-th -1 of i-th of receiving end VSC types current conversion station 3 The output end of individual receiving end VSC types current conversion station 3 is connected, the output end of i receiving end VSC types current conversion station 3 also with i receiving end equivalent power supply 4 correspond connected, i >=2.Adjustment unit and sending end VSC types current conversion station 2 and/or at least one phase of receiving end VSC types current conversion station 3 Even.
In the multiterminal element test system that the present embodiment is provided, multi-terminal HVDC transmission unit is specifically included for realizing Sending end equivalent power supply 1, sending end VSC types current conversion station 2, i receiving end VSC types current conversion station 3 and the i receiving end equivalent power supply of direct current transportation 4, adjustment unit is connected with sending end VSC types current conversion station 2 and/or at least one receiving end VSC types current conversion station 3, and this makes it possible to utilize Adjustment unit is by adjusting the operational factor of multi-terminal HVDC transmission unit, so as to test multi-terminal HVDC transmission unit in different operations Characteristic under parameter, and then realize and deep analysis and research are carried out to multi-terminal HVDC transmission unit.
Referring again to Fig. 1, adjustment unit specifically may include that sending end determines direct current voltage regulator 51 and i receiving end determines direct current Power governor 52.
Wherein, sending end is determined direct current voltage regulator 51 and is connected with sending end VSC types current conversion station 2, and sending end determines DC voltage regulation Device 51 is used for the DC voltage for adjusting sending end VSC types current conversion station 2.I receiving end determine dc power adjuster 52 respectively with i receiving end VSC types current conversion station 3, which corresponds, to be connected, and receiving end determines dc power adjuster 52 and is used to adjust corresponding receiving end VSC types current conversion station 3 Dc power.
When adjustment unit includes sending end direct current voltage regulator 51 and i receiving end determines dc power adjuster 52, pass through The DC voltage of sending end VSC types current conversion station 2 is adjusted, can test multi-terminal HVDC transmission unit has in sending end VSC types current conversion station 2 Steady-state response characteristic and transient response characteristic under different DC voltages.
As shown in Fig. 2 adjustment unit specifically may include that receiving end determines direct current voltage regulator 53, sending end determines dc power regulation Device 54 and i-1 receiving end determine dc power adjuster 52.
Wherein, receiving end is determined direct current voltage regulator 53 and is connected with n-th of receiving end VSC types current conversion station 3, and receiving end determines DC voltage Adjuster 53 is used for the DC voltage for adjusting n-th of receiving end VSC types current conversion station 3, n=1~i.Sending end determines dc power adjuster 54 are connected with sending end VSC types current conversion station 2, and sending end determines the direct current that dc power adjuster 54 is used to adjust sending end VSC types current conversion station 2 Power.I-1 receiving end determines dc power adjuster 52 with removing n-th of receiving end VSC type current conversion station in i receiving end VSC type current conversion station Outer other receiving end VSC types current conversion stations 3, which correspond, to be connected, and it is coupled for adjusting that receiving end determines dc power adjuster 52 The dc power of receiving end VSC types current conversion station 3.
When adjustment unit determines direct current voltage regulator 53 including receiving end, sending end determines dc power adjuster 54 and i-1 by When dc power adjuster 52 is determined at end, by adjusting the DC voltage of n-th of receiving end VSC types current conversion station 3, it is straight multiterminal can be tested Flow steady-state response characteristic and transient response characteristic of the power transmission unit in the case where receiving end VSC types current conversion station 3 has different DC voltages.
As shown in figure 3, specifically, adjustment unit may include sending end control model adjuster 61 and/or at least one receiving end Control model adjuster 62.
Wherein, when adjustment unit includes sending end control model adjuster 61, sending end control model adjuster 61 and sending end VSC types current conversion station 2 is connected, and sending end control model adjuster 61 is used for the control model for adjusting sending end VSC types current conversion station 2.Work as tune Section unit is when including at least one receiving end control model adjuster 62, at least one receiving end control model adjuster 62 respectively with extremely A few receiving end VSC types current conversion station 3, which corresponds, to be connected, and receiving end control model adjuster 62 is used to adjust coupled receiving end The control model of VSC types current conversion station 3.
When adjustment unit includes control sending end control model adjuster 61, by the control for adjusting sending end VSC types current conversion station 2 Molding formula, steady-state response of the multi-terminal HVDC transmission unit in the case where sending end VSC types current conversion station 2 has different control models can be tested Characteristic and transient response characteristic.When adjustment unit includes at least one receiving end control model adjuster 62, by adjusting receiving end The control model of VSC types current conversion station 3, can test multi-terminal HVDC transmission unit has different controls in receiving end VSC types current conversion station 3 Steady-state response characteristic and transient response characteristic under pattern.
As shown in figure 4, adjustment unit may include sending end power governor 71 and receiving end power governor 72, or, such as Fig. 5 Shown, adjustment unit may include two receiving end power governors 72.
When adjustment unit includes sending end power governor 71 and receiving end power governor 72, sending end power governor 71 with Sending end VSC types current conversion station 2 is connected, and sending end power governor 71 is used for the transmission power value for adjusting sending end VSC types current conversion station 2.By End power governor 72 is connected with the 1st receiving end VSC types current conversion station 3, and receiving end power governor 72 is used to adjust the 1st receiving end The transmission power value of VSC types current conversion station 3.
When adjustment unit includes two receiving end power governors 72, first receiving end power governor 72 and the i-th -1 Receiving end VSC types current conversion station 3 is connected, and first receiving end power governor 72 is used for the i-th -1 receiving end VSC types current conversion station 3 of adjustment Transmission power value.Second receiving end power governor 72 is connected with i-th of receiving end VSC types current conversion station 3, and second receiving end power is adjusted Save the transmission power value that device 72 is used to adjust i-th of receiving end VSC types current conversion station 3;Wherein, i >=2.
When adjustment unit includes sending end power governor 71 and receiving end power governor 72, by adjusting sending end VSC types The transmission power value of current conversion station 2 and the 1st receiving end VSC types current conversion station 3, can test multi-terminal HVDC transmission unit in different work( Steady-state characteristic under rate transportation horizontal.Likewise, when adjustment unit includes two receiving end power governors 72, pass through adjustment the The transmission power value of i-1 receiving end VSC types current conversion station 3 and i-th of receiving end VSC types current conversion station 3, it is defeated can also to test multiterminal element Steady-state characteristic of the electric unit under different power transportation horizontals.
In the multiterminal element test system that the present embodiment is provided, sending end equivalent power supply 1 and sending end VSC types current conversion station 2 Between be connected by alternating current circuit, pass through DC line between sending end VSC types current conversion station 2 and the 1st receiving end VSC types current conversion station 3 Be connected, be connected between i-th of receiving end VSC types current conversion station 3 and the i-th -1 receiving end VSC types current conversion station 3 by DC line, respectively by It is connected between end VSC types current conversion station 3 and corresponding receiving end equivalent power supply 4 by alternating current circuit.
As shown in fig. 6, adjustment unit may also include at least one impedance regulator 8, impedance regulator 8 and the equivalent electricity of sending end Alternating current circuit between source 1 and sending end VSC types current conversion station 2 is connected, and/or, impedance regulator 8 and receiving end VSC types current conversion station 3 with Alternating current circuit between corresponding receiving end equivalent power supply 4 is connected, and impedance regulator 8 is used to adjust coupled alternating current circuit Impedance value.
When adjustment unit includes impedance regulator 8, by adjusting the impedance value of alternating current circuit, multiterminal element can be tested Transient response characteristic of the power transmission unit under different exchange degree of strength.
As shown in fig. 7, the multiterminal element test system that the present embodiment is provided also includes sending end direct current protecting device 9 and i Individual receiving end direct current protecting device 10.
Sending end direct current protecting device 9 is connected with sending end VSC types current conversion station 2, and sending end direct current protecting device 9 is used for sending end VSC types current conversion station 2 carries out latch-up protection.I receiving end direct current protecting device 10 respectively with a pair of i receiving end VSC types current conversion station 3 one It should be connected, receiving end direct current protecting device 10 is used to carry out latch-up protection to corresponding receiving end VSC types current conversion station 3.
, can be with when multiterminal element test system includes sending end direct current protecting device 9 and i receiving end direct current protecting device 10 Whether test sending end direct current protecting device 9 performs correct latch-up protection operation, and test to sending end VSC types current conversion station 2 Whether receiving end direct current protecting device 10 performs correct latch-up protection operation to receiving end VSC types current conversion station 3.
It should be noted that above-mentioned sending end equivalent power supply 1, sending end VSC types current conversion station 2, receiving end VSC types current conversion station 3, receiving end Equivalent power supply 4, sending end determine direct current voltage regulator 51, receiving end determines dc power adjuster 52, receiving end determines direct current voltage regulator 53rd, sending end determines dc power adjuster 54, sending end control model adjuster 61, receiving end control model adjuster 62, sending end power Adjuster 71, receiving end power governor 72, impedance regulator 8, sending end direct current protecting device 9 and the institute of receiving end direct current protecting device 10 The function of realization is existing sending end equivalent power supply 1, sending end VSC types current conversion station 2, receiving end VSC types current conversion station 3, receiving end equivalence Power supply 4, sending end determine direct current voltage regulator 51, receiving end determines dc power adjuster 52, receiving end determines direct current voltage regulator 53, send Determine dc power adjuster 54, sending end control model adjuster 61, receiving end control model adjuster 62, sending end power governor in end 71st, achieved by receiving end power governor 72, impedance regulator 8, sending end direct current protecting device 9 and receiving end direct current protecting device 10 Function, it is of the present utility model to the improvement is that the annexation improved between above-mentioned each structure, and connected using which kind of mode Connect, and those skilled in the art can expect according to existing knowledge.
Specific embodiment of the present utility model is the foregoing is only, but the scope of protection of the utility model is not limited to This, any one skilled in the art is in the technical scope that the utility model discloses, the change that can readily occur in Or replace, it should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should be with the power The protection domain that profit requires is defined.

Claims (8)

1. a kind of multiterminal element test system, it is characterised in that the multiterminal element test system includes multi-terminal HVDC transmission list The adjustment unit of member and the operational factor for adjusting the multi-terminal HVDC transmission unit;
The multi-terminal HVDC transmission unit include sending end equivalent power supply, sending end VSC types current conversion station, i receiving end VSC types current conversion station and I receiving end equivalent power supply;Wherein, the input of the sending end VSC type current conversion stations is connected with the sending end equivalent power supply, described to send The output end of end VSC type current conversion stations is connected with the input of the 1st receiving end VSC type current conversion station, i-th of receiving end VSC type current conversion station Input be connected with the output end of the i-th -1 receiving end VSC type current conversion station, the output end of i receiving end VSC type current conversion station also with i Individual receiving end equivalent power supply, which corresponds, to be connected, i >=2;
The adjustment unit is connected with the sending end VSC types current conversion station and/or at least one receiving end VSC type current conversion stations.
2. multiterminal element test system according to claim 1, it is characterised in that it is surely straight that the adjustment unit includes sending end Current-voltage regulator and i receiving end determine dc power adjuster;
Wherein, the sending end is determined direct current voltage regulator and is connected with the sending end VSC type current conversion stations, and the sending end determines DC voltage Adjuster is used for the DC voltage for adjusting the sending end VSC type current conversion stations;
The i receiving ends are determined dc power adjuster and are connected respectively with the i receiving end VSC types current conversion stations one-to-one corresponding, described Receiving end determines the dc power that dc power adjuster is used to adjust corresponding receiving end VSC type current conversion stations.
3. multiterminal element test system according to claim 1, it is characterised in that it is surely straight that the adjustment unit includes receiving end Current-voltage regulator, sending end determine dc power adjuster and i-1 receiving end determines dc power adjuster;
Wherein, the receiving end is determined direct current voltage regulator and is connected with n-th of receiving end VSC type current conversion station, and the receiving end determines direct current Adjuster is pressed to be used for the DC voltage for adjusting n-th of receiving end VSC type current conversion station, n=1~i;
The sending end is determined dc power adjuster and is connected with the sending end VSC type current conversion stations, and the sending end determines dc power regulation Device is used for the dc power for adjusting the sending end VSC type current conversion stations;
The i-1 receiving ends determine dc power adjuster respectively with removing n-th of receiving end VSC in the i receiving end VSC type current conversion stations Other receiving end VSC types current conversion stations outside type current conversion station, which correspond, to be connected, and the receiving end determines dc power adjuster and is used to adjust The dc power of corresponding receiving end VSC type current conversion stations.
4. multiterminal element test system according to claim 1, it is characterised in that the adjustment unit controls including sending end Mode regulators and/or at least one receiving end control model adjuster;
Wherein, the sending end control model adjuster is connected with the sending end VSC type current conversion stations, the sending end control model regulation Device is used for the control model for adjusting the sending end VSC type current conversion stations;
At least one receiving end control model adjuster corresponds phase with least one receiving end VSC types current conversion station respectively Even, the receiving end control model adjuster is used for the control model for adjusting corresponding receiving end VSC type current conversion stations.
5. multiterminal element test system according to claim 1, it is characterised in that
The adjustment unit includes sending end power governor and receiving end power governor;Wherein, the sending end power governor with The sending end VSC type current conversion stations are connected, and the sending end power governor is used for the conveying work(for adjusting the sending end VSC type current conversion stations Rate value;The receiving end power governor is connected with the 1st receiving end VSC type current conversion station, and the receiving end power governor is used to adjust The transmission power value of 1st receiving end VSC type current conversion station;
Or, the adjustment unit includes two receiving end power governors;Wherein, the 1st receiving end power governor and described i-th -1 Individual receiving end VSC type current conversion stations are connected, and the 1st receiving end power governor is used to adjust the i-th -1 receiving end VSC type changes of current The transmission power value stood;2nd receiving end power governor is connected with i-th of receiving end VSC type current conversion stations, described 2nd by Power governor is held to be used for the transmission power value for adjusting i-th of receiving end VSC type current conversion station.
6. multiterminal element test system according to claim 1, it is characterised in that the sending end equivalent power supply is sent with described It is connected between the VSC type current conversion stations of end by alternating current circuit, the sending end VSC types current conversion station and the 1st receiving end VSC type changes of current It is connected between standing by DC line, is led between i-th of receiving end VSC types current conversion station and the i-th -1 receiving end VSC type current conversion station Cross DC line to be connected, be connected between each receiving end VSC types current conversion station and corresponding receiving end equivalent power supply by alternating current circuit.
7. multiterminal element test system according to claim 6, it is characterised in that the adjustment unit includes at least one AC line between impedance regulator, the impedance regulator and the sending end equivalent power supply and the sending end VSC type current conversion stations Road is connected, and/or, the friendship between the impedance regulator and the receiving end VSC types current conversion station and corresponding receiving end equivalent power supply Flow Line is connected, and the impedance regulator is used for the impedance value for adjusting coupled alternating current circuit.
8. multiterminal element test system according to claim 1, it is characterised in that the multiterminal element test system is also wrapped Include sending end direct current protecting device and i receiving end direct current protecting device;
The sending end direct current protecting device is connected with the sending end VSC type current conversion stations, the sending end direct current protecting device be used for pair The sending end VSC types current conversion station carries out latch-up protection;
The i receiving end direct current protecting devices correspond with the i receiving end VSC types current conversion stations respectively to be connected, the receiving end Direct current protecting device is used to carry out latch-up protection to corresponding receiving end VSC types current conversion station.
CN201720411498.XU 2017-04-18 2017-04-18 A kind of multiterminal element test system Active CN206920526U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112051471A (en) * 2020-09-14 2020-12-08 南方电网科学研究院有限责任公司 Method, system and equipment for testing direct-current external characteristics of hybrid multi-terminal power transmission system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112051471A (en) * 2020-09-14 2020-12-08 南方电网科学研究院有限责任公司 Method, system and equipment for testing direct-current external characteristics of hybrid multi-terminal power transmission system
CN112051471B (en) * 2020-09-14 2021-11-26 南方电网科学研究院有限责任公司 Method, system and equipment for testing direct-current external characteristics of hybrid multi-terminal power transmission system

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