CN102738810A - Traction power supply system and method - Google Patents

Traction power supply system and method Download PDF

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Publication number
CN102738810A
CN102738810A CN2012102257020A CN201210225702A CN102738810A CN 102738810 A CN102738810 A CN 102738810A CN 2012102257020 A CN2012102257020 A CN 2012102257020A CN 201210225702 A CN201210225702 A CN 201210225702A CN 102738810 A CN102738810 A CN 102738810A
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CN
China
Prior art keywords
filter
supply lines
transformer
current signal
controller
Prior art date
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CN2012102257020A
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Chinese (zh)
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CN102738810B (en
Inventor
周方圆
黄燕艳
文韬
吴强
蔡蔚
石二磊
朱建波
邓建华
龙礼兰
邱文俊
吴选保
彭勃
唐建宇
张典
周靖
杨磊
毛金平
Original Assignee
株洲变流技术国家工程研究中心有限公司
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Priority to CN201210225702.0A priority Critical patent/CN102738810B/en
Publication of CN102738810A publication Critical patent/CN102738810A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30Reactive power compensation
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40Arrangements for reducing harmonics

Abstract

The invention discloses a traction power supply system and a method by application of a SCOTT transformer, wherein the traction power supply system comprises a first transformer, a second transformer, a first filter, a second filter, a power regulator, a current detection device and a controller; the current detection device is respectively connected with a first power supply wire and a second power supply wire, the controller is respectively connected with the current detection device, the first filter, the second filter and the power regulator, the power regulator is respectively connected with secondary sides of the first transformer and the second transformer, and the first filter and the second filter are respectively connected with secondary sides of the first transformer and the second transformer. By the adoption of the traction power supply system and the method, a comprehensive control on negative sequence, idle work and harmonic wave of the traction power supply system can be realized.

Description

Tractive power supply system and method
Technical field
The present invention relates to the technical field of power quality harnessed synthetically, more particularly, relate to the system and method for a kind of application Scott (SCOTT) transformer traction power supply.
Background technology
The development of China's electric railway in recent years has advantages such as carrying capacity is strong, road speed is fast, energy savings is high, environmental pollution is little, for fast development of national economy plays the important and pivotal role very rapidly.Yet because electric locomotive is high-power single-phase load; Have characteristics such as non-linear, asymmetry and fluctuation; Therefore; In running, can produce a large amount of negative phase-sequences, idle harmonic electric current injects electrical network, makes voltage ripple of power network distortion, three-phase imbalance and power factor low, safe, the stable and economical operation of power supply system of electric traction is brought seriously influence.
Summary of the invention
In view of this, the present invention provides a kind of system and method for traction power supply, to realize the comprehensive regulation to tractive power supply system negative phase-sequence, idle harmonic.
For solving the problems of the technologies described above; The technical scheme that the present invention adopts is: a kind of system of tractive power supply system power quality harnessed synthetically comprises: first transformer, second transformer, first filter, second filter, power governor, current sensing means and controller; Wherein:
Said current sensing means links to each other with second supply lines with first supply lines respectively, is used to gather and send the current signal of said first supply lines and second supply lines;
Said controller links to each other with power governor with current sensing means, first filter, second filter respectively; Be used to receive first current signal of said first supply lines and second supply lines, and regulate the capacity of said first filter, second filter and power governor according to said current signal;
Said power governor links to each other with the secondary of first transformer with second transformer respectively, is used for active power, compensating power and the filtering harmonic of said first supply lines of balance and second supply lines;
Said first filter links to each other with the secondary of first transformer with second transformer respectively with second filter, is used for the reactive power compensation harmonic filtering of said first supply lines and second supply lines.
Preferably, said system also comprises: current tracing controller and dc voltage checkout gear; Wherein:
Said current tracing controller links to each other with controller with said power governor output respectively, is used to gather output second current signal of said power governor, and said second current signal is sent in the controller;
Said dc voltage checkout gear links to each other with controller with the DC side of said power governor respectively, is used to gather the dc voltage signal of said power governor, and converts said voltage signal into the 3rd current signal and be sent in the controller.
Preferably, said first current signal comprises meritorious component information and idle component information.
Preferably, said first transformer and second transformer are single-phase multi winding transformer.
Preferably, said first filter and second filter are the thyristor control filters.
Preferably, said thyristor filter is composed in parallel by the thyristor series capacitance of two reverse parallel connections and the branch road of reactance by many groups.
Preferably, said power governor by many groups by the voltage source converter of two connect respectively first reactance and second reactance back-to-back the branch road of shunt capacitance compose in parallel; Wherein:
First reactance of said each branch road links to each other with the secondary of first transformer, and second reactance links to each other with the secondary of second transformer.
A kind of method of tractive power supply system power quality harnessed synthetically comprises:
Gather first current signal of first supply lines and second supply lines, and said current signal is sent to controller;
Said controller is regulated the capacity of said first filter, second filter and power governor according to first current signal that is received;
Power governor through after the capacity regulating carries out active power balance, the filtering of reactive power compensation harmonic to first supply lines and second supply lines;
First filter and second filter through after the capacity regulating compensate the harmonic filtering to the reactive power of first supply lines and second supply lines respectively.
Preferably, said method also comprises:
Gather output second current signal of said power governor, and said second current signal is sent in the controller;
Gather the dc voltage signal of said power governor, and convert said voltage signal into the 3rd current signal and be sent in the controller;
Controller stagnates chain rate according to first current signal that is received and second current signal, carries out PI according to said dc voltage signal and regulates.
Preferably, said first current signal comprises meritorious component information and idle component information.
Preferably, said first filter and second filter are the thyristor control filters.
Preferably, said thyristor filter is composed in parallel by the thyristor series capacitance of two reverse parallel connections and the branch road of reactance by many groups.
Preferably, said power governor by many groups by the voltage source converter of two connect respectively first reactance and second reactance back-to-back the branch road of shunt capacitance compose in parallel; Wherein:
First reactance of said each branch road links to each other with the secondary of first transformer, and second reactance links to each other with the secondary of second transformer.
Can find out from above-mentioned technical scheme; The system of tractive power supply system power quality harnessed synthetically disclosed by the invention; Current signal through first supply lines and second supply lines in current sensing means collection and the transmission electric power system; Controller is regulated the capacity of first filter, second filter and power governor according to the current signal that receives; Make win filter and second filter can carry out the filtering of reactive power compensation harmonic according to the real-time load current on first supply lines and second supply lines, power governor can carry out active power balance, the filtering of reactive power compensation harmonic according to the real-time load current on first supply lines and second supply lines.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the disclosed a kind of tractive power supply system of the embodiment of the invention;
Fig. 2 is the flow chart of the disclosed a kind of traction power supply method of the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The embodiment of the invention discloses a kind of tractive power supply system and method, to realize the comprehensive regulation to tractive power supply system negative phase-sequence, idle harmonic.
As shown in Figure 1, a kind of system that uses SCOTT transformer traction power supply comprises: first transformer 11, second transformer 12, first filter 13, second filter 14, power governor 15, current sensing means 16 and controller 17; Wherein:
First transformer 11 links to each other with the Building M of SCOTT transformer, and second transformer links to each other with the Building T of SCOTT transformer;
Current sensing means 16 links to each other with second supply lines 19 with first supply lines 18 respectively, is used to gather and send first current signal of first supply lines 18 and second supply lines 19;
Controller 17 links to each other with power governor 15 with current sensing means 16, first filter 13, second filter 14 respectively; Be used to receive the current signal of first supply lines 18 and second supply lines 19, and regulate the capacity of said first filter 13, second filter 14 and power governor 15 according to current signal;
Power governor 15 links to each other with the secondary of first transformer 11 and second transformer 12 respectively, is used for active power, compensating power and the filtering harmonic of balance first supply lines 18 and second supply lines 19;
First filter 13 links to each other with the secondary of first transformer 11 and second transformer 12 respectively with second filter 14, is used for the reactive power compensation harmonic filtering of first supply lines 18 and second supply lines 19.
In the foregoing description; Current signal through first supply lines and second supply lines in current sensing means collection and the transmission electric power system; Controller is regulated the capacity of first filter, second filter and power governor according to the current signal that receives; Make win filter and second filter can carry out the filtering of reactive power compensation harmonic according to the real-time load current on first supply lines and second supply lines, power governor can carry out active power balance, the filtering of reactive power compensation harmonic according to the real-time load current on first supply lines and second supply lines.
Concrete, also comprise: current tracing controller and dc voltage checkout gear; Wherein:
Current tracing controller links to each other with controller with the output of power governor respectively, is used to gather output second current signal of power governor, and said second current signal is sent in the controller;
The dc voltage checkout gear links to each other with controller with the DC side of power governor respectively, is used to gather the voltage signal of the DC side of power governor, and converts said voltage signal into the 3rd current signal and be sent in the controller.
Concrete, described first current signal comprises negative idle component and real component.
Concrete, first transformer 11 and second transformer 12 are single-phase multi winding transformer.
Concrete, first filter 13 and second filter 14 are the thyristor control filters.
Concrete, the thyristor filter is composed in parallel by the thyristor series capacitance of two reverse parallel connections and the branch road of reactance by many groups.
Concrete, power governor 15 by many groups by the voltage source converter of two connect respectively first reactance and second reactance back-to-back the branch road of shunt capacitance compose in parallel; Wherein:
First reactance of each branch road links to each other with the secondary of first transformer, and second reactance links to each other with the secondary of second transformer.
As shown in Figure 2, a kind of method of traction power supply comprises:
S101, gather first current signal of first supply lines and second supply lines, and said current signal is sent to controller;
Concrete, comprise negative-sequence current signal, reactive current signal harmonic current signal in above-mentioned first current signal.
S102, controller are regulated the capacity of said first filter, second filter and power governor according to first current signal that is received;
Concrete; Can judge the active current size of first supply lines and second supply lines through the real component information that is comprised in first current signal; In order to make the active current balance on first supply lines and second supply lines; Need the half the of difference of two supply lines active currents be transferred on the little supply lines of active current, through the capacity of difference size adjustment power governor through power governor;
Can judge the power loss on first supply lines and second supply lines through the idle component information in first current signal, and then regulate the capacity of power governor, first filter and second filter through controller;
Can judge the harmonic wave size on first supply lines and second supply lines through the harmonic information in first current signal, and then regulate the capacity of power governor, first filter and second filter through controller.
Power governor after S103, the process capacity regulating carries out active power balance, the filtering of reactive power compensation harmonic to first supply lines and second supply lines;
First filter and second filter after S104, the process capacity regulating compensate the harmonic filtering to the reactive power of first supply lines and second supply lines respectively.
On the basis of the foregoing description, more accurate in order to make to the volume controlled of power governor, on the basis of the foregoing description, also increased:
Gather output second current signal of said power governor, and said second current signal is sent in the controller;
Gather the voltage signal of the DC side of said power governor, and convert said voltage signal into the 3rd current signal and be sent in the controller;
Controller stagnates chain rate according to first current signal that is received and second current signal, carries out PI according to voltage signal and regulates.
At last; Also need to prove; In this article; Relational terms such as first and second grades only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint relation or the order that has any this reality between these entities or the operation.And; Term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability; Thereby make and comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements; But also comprise other key elements of clearly not listing, or also be included as this process, method, article or equipment intrinsic key element.Under the situation that do not having much more more restrictions, the key element that limits by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises said key element and also have other identical element.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims (13)

1. a tractive power supply system is characterized in that, comprising: first transformer, second transformer, first filter, second filter, power governor, current sensing means and controller; Wherein:
Said current sensing means links to each other with second supply lines with first supply lines respectively, is used to gather and send the current signal of said first supply lines and second supply lines;
Said controller links to each other with power governor with current sensing means, first filter, second filter respectively; Be used to receive first current signal of said first supply lines and second supply lines, and regulate the capacity of said first filter, second filter and power governor according to said current signal;
Said power governor links to each other with the secondary of first transformer with second transformer respectively, is used for active power, compensating power and the filtering harmonic of said first supply lines of balance and second supply lines;
Said first filter links to each other with the secondary of first transformer with second transformer respectively with second filter, is used for the reactive power compensation harmonic filtering of said first supply lines and second supply lines.
2. system according to claim 1 is characterized in that, also comprises: current tracing controller and dc voltage checkout gear; Wherein:
Said current tracing controller links to each other with controller with said power governor output respectively, is used to gather output second current signal of said power governor, and said second current signal is sent in the controller;
Said dc voltage checkout gear links to each other with controller with the DC side of said power governor respectively, is used to gather the dc voltage signal of said power governor, and converts said voltage signal into the 3rd current signal and be sent in the controller.
3. system according to claim 1 is characterized in that, said first current signal comprises meritorious component information and idle component information.
4. system according to claim 1 is characterized in that, said first transformer and second transformer are single-phase multi winding transformer.
5. system according to claim 1 is characterized in that, said first filter and second filter are the thyristor control filters.
6. system according to claim 5 is characterized in that, said thyristor filter is composed in parallel by the thyristor series capacitance of two reverse parallel connections and the branch road of reactance by many groups.
7. system according to claim 1 is characterized in that, said power governor by many groups by the voltage source converter of two connect respectively first reactance and second reactance back-to-back the branch road of shunt capacitance compose in parallel; Wherein:
First reactance of said each branch road links to each other with the secondary of first transformer, and second reactance links to each other with the secondary of second transformer.
8. a traction power supply method is characterized in that, comprising:
Gather first current signal of first supply lines and second supply lines, and said current signal is sent to controller;
Said controller is regulated the capacity of said first filter, second filter and power governor according to first current signal that is received;
Power governor through after the capacity regulating carries out active power balance, the filtering of reactive power compensation harmonic to first supply lines and second supply lines;
First filter and second filter through after the capacity regulating compensate the harmonic filtering to the reactive power of first supply lines and second supply lines respectively.
9. method according to claim 8 is characterized in that, also comprises:
Gather output second current signal of said power governor, and said second current signal is sent in the controller;
Gather the dc voltage signal of said power governor, and convert said voltage signal into the 3rd current signal and be sent in the controller;
Controller stagnates chain rate according to first current signal that is received and second current signal, carries out PI according to said dc voltage signal and regulates.
10. method according to claim 7 is characterized in that, said first current signal comprises meritorious component information and idle component information.
11. method according to claim 7 is characterized in that, said first filter and second filter are the thyristor control filters.
12. system according to claim 11 is characterized in that, said thyristor filter is composed in parallel by the thyristor series capacitance of two reverse parallel connections and the branch road of reactance by many groups.
13. system according to claim 7 is characterized in that, said power governor by many groups by the voltage source converter of two connect respectively first reactance and second reactance back-to-back the branch road of shunt capacitance compose in parallel; Wherein:
First reactance of said each branch road links to each other with the secondary of first transformer, and second reactance links to each other with the secondary of second transformer.
CN201210225702.0A 2012-07-02 2012-07-02 Traction power supply system and method CN102738810B (en)

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Cited By (11)

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Publication number Priority date Publication date Assignee Title
CN102882208A (en) * 2012-10-27 2013-01-16 株洲变流技术国家工程研究中心有限公司 Electric railway electric energy quality comprehensive treatment device control method
CN102938563A (en) * 2012-10-27 2013-02-20 株洲变流技术国家工程研究中心有限公司 Electrified railway power quality comprehensive processing device
CN103023043A (en) * 2012-11-23 2013-04-03 江苏省电力公司电力科学研究院 Two-phase STATCOM (Static Synchronous Compensator) management device on traction side of electrified railway, and control method of device
CN103050262A (en) * 2012-12-25 2013-04-17 保定天威集团(江苏)五洲变压器有限公司 Three-phase to single-phase transformer
CN103560508A (en) * 2013-09-27 2014-02-05 株洲变流技术国家工程研究中心有限公司 Direct hanging type large-capacity electric energy quality comprehensive managing device for electrified railway
CN104659788A (en) * 2015-01-27 2015-05-27 上海交通大学 Transformer control system and control method thereof
CN104901305A (en) * 2015-05-28 2015-09-09 株洲变流技术国家工程研究中心有限公司 Traction power supply network tail end voltage boosting device with power fusing function and method of device
CN105946597A (en) * 2016-05-30 2016-09-21 株洲中车时代电气股份有限公司 Train power supply system of locomotives
CN106159975A (en) * 2016-08-16 2016-11-23 南京南瑞继保电气有限公司 A kind of series compensation device being applicable to multi circuit transmission lines
CN104779623B (en) * 2014-01-15 2017-01-25 河海大学 Electric railway traction substation combined compensation system and compensation method
CN107732916A (en) * 2017-11-21 2018-02-23 国家电网公司 Parallel connection type harmonic electric energy extraction element

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JPH06261548A (en) * 1993-03-09 1994-09-16 Mitsubishi Electric Corp Unbalance compensator for three phase/two phase converter
CN201774261U (en) * 2010-08-03 2011-03-23 湖南大学 High-speed railway negative sequence and harmonic compensation system based on two-phase three-wire system converter
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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102882208B (en) * 2012-10-27 2015-10-21 株洲变流技术国家工程研究中心有限公司 A kind of electric railway electric energy quality comprehensive treatment device control method
CN102938563A (en) * 2012-10-27 2013-02-20 株洲变流技术国家工程研究中心有限公司 Electrified railway power quality comprehensive processing device
CN102938563B (en) * 2012-10-27 2015-10-21 株洲变流技术国家工程研究中心有限公司 A kind of electric railway electric energy quality comprehensive treatment device
CN102882208A (en) * 2012-10-27 2013-01-16 株洲变流技术国家工程研究中心有限公司 Electric railway electric energy quality comprehensive treatment device control method
CN103023043B (en) * 2012-11-23 2014-09-03 江苏省电力公司电力科学研究院 Two-phase STATCOM (Static Synchronous Compensator) management device on traction side of electrified railway, and control method of device
CN103023043A (en) * 2012-11-23 2013-04-03 江苏省电力公司电力科学研究院 Two-phase STATCOM (Static Synchronous Compensator) management device on traction side of electrified railway, and control method of device
CN103050262A (en) * 2012-12-25 2013-04-17 保定天威集团(江苏)五洲变压器有限公司 Three-phase to single-phase transformer
CN103560508B (en) * 2013-09-27 2016-08-03 株洲变流技术国家工程研究中心有限公司 A kind of electric railway direct hanging type Large Copacity Power Quality Comprehensive Treatment Device
CN103560508A (en) * 2013-09-27 2014-02-05 株洲变流技术国家工程研究中心有限公司 Direct hanging type large-capacity electric energy quality comprehensive managing device for electrified railway
CN104779623B (en) * 2014-01-15 2017-01-25 河海大学 Electric railway traction substation combined compensation system and compensation method
CN104659788A (en) * 2015-01-27 2015-05-27 上海交通大学 Transformer control system and control method thereof
CN104901305A (en) * 2015-05-28 2015-09-09 株洲变流技术国家工程研究中心有限公司 Traction power supply network tail end voltage boosting device with power fusing function and method of device
CN104901305B (en) * 2015-05-28 2019-11-12 株洲变流技术国家工程研究中心有限公司 Traction power supply network voltage at tail end lifting device and its method with power circulation function
CN105946597A (en) * 2016-05-30 2016-09-21 株洲中车时代电气股份有限公司 Train power supply system of locomotives
CN106159975A (en) * 2016-08-16 2016-11-23 南京南瑞继保电气有限公司 A kind of series compensation device being applicable to multi circuit transmission lines
CN106159975B (en) * 2016-08-16 2019-12-06 南京南瑞继保电气有限公司 Series compensation device suitable for multi-circuit line
CN107732916A (en) * 2017-11-21 2018-02-23 国家电网公司 Parallel connection type harmonic electric energy extraction element

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