CN203251095U - A negative sequence compensation system in electrified railways - Google Patents
A negative sequence compensation system in electrified railways Download PDFInfo
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- CN203251095U CN203251095U CN 201320283977 CN201320283977U CN203251095U CN 203251095 U CN203251095 U CN 203251095U CN 201320283977 CN201320283977 CN 201320283977 CN 201320283977 U CN201320283977 U CN 201320283977U CN 203251095 U CN203251095 U CN 203251095U
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The utility model discloses a negative sequence compensation system in electrified railways. The negative sequence compensation system comprises a signal acquisition controller, a magnetically-controlled reactor, and a capacitor branch. The magnetically-controlled reactor is connected with the high-voltage side of a power grid. The capacitor branch is connected with the low-voltage side of the power grid. The signal acquisition controller is connected with the magnetically-controlled reactor and the capacitor branch. According to the active power and the reactive power among the three phases of the power grid, the signal acquisition controller calculates the value of capacity required to be compensated among the three phases of the power grid. And according to a calculated result, the signal acquisition controller generates a control signal for controlling the capacitor branch to provide reactive power and the magnetically-controlled reactor to output compensation capacity. The negative sequence compensation system is capable of reducing the installed capacity and the floor space of a compensation system while achieving negative sequence compensation of electrified railways.
Description
Technical field
The utility model relates to railway negative sequence compensation technical field, more particularly, relates to a kind of electric railway negative sequence compensation system.
Background technology
Electric locomotive is a kind of important means of transportation, and same internal combustion, steam locomotive are compared, and has energy-saving and environmental protection, the various advantages such as efficient.According to China " medium-term and long-term railway network planning (2008 adjust) ", to the year two thousand twenty, the china railway revenue kilometres will reach more than 120,000 kilometers, and electrochemical rate reaches more than 60%.Along with the continuous construction development of electric railway, it more and more is subject to researcher's attention on the quality of power supply impact of electrical network.
Because electrization railway draught load is single-phase load, not only power factor is lower, also can produce larger negative sequence component when its access electrical network, and the safety and economic operation of power equipment and electric power system is threatened.Therefore, in order to improve the quality of power supply, the railway power system Adopts measure mainly is by directly in single station of traction substation low-pressure side thyristor-controlled reactor (TCR) type Static Var Compensator and fixed capacitor being installed at present, but, in single station low-pressure side thyristor-controlled reactor (TCR) type Static Var Compensator is installed respectively, can cause harmonic content large, total compensation capacity is large, and cost is high.
The utility model content
In view of this, the utility model provides a kind of electric railway negative sequence compensation system, can be implemented in when electric railway carried out negative sequence compensation, reduces installed capacity and the floor space of bucking-out system.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of electric railway negative sequence compensation system comprises: signal acquisition controller, magnet controlled reactor and capacitor branch road; Wherein:
Described magnet controlled reactor is connected with the high-pressure side of electrical network;
Described capacitor branch road is connected with the low-pressure side of electrical network;
Described signal acquisition controller is connected with the capacitor branch road with described magnet controlled reactor respectively;
Active power and reactive power that described signal acquisition controller is alternate according to electrical network three, calculate the electrical network three alternate amount of capacity that need compensation, and provide control signal idle and the described magnet controlled reactor output of control compensation capacity according to the described capacitor branch road of result of calculation generation control.
Preferably, described system also comprises: current transformer, voltage transformer, current transducer, voltage transmitter and power transducer; Wherein:
Described current transformer is connected with the high-pressure side of electrical network, gathers the on high-tension side current signal of described electrical network, and the described current signal that will gather is sent to connected described current transducer and power transducer;
Described voltage transformer is connected with the high-pressure side of electrical network, gathers the on high-tension side voltage signal of described electrical network, and the described voltage signal that will gather is sent to connected described voltage transmitter and power transducer;
Described current transducer exports connected signal acquisition controller to after described current signal is changed;
Described voltage transmitter exports connected signal acquisition controller to after described voltage signal is changed;
Described power transducer exports connected signal acquisition controller to after with the conversion of described current signal and voltage signal;
Described signal acquisition controller calculates electrical network three alternate active power and reactive power according to the current signal after the conversion that receives and voltage signal.
Preferably, described signal acquisition controller is the PLC controller.
Preferably, described magnet controlled reactor is the magnet controlled reactor that main winding adopts delta connection.
Preferably, the model of described current transducer is: KCE-IJ03-A6-4-D24; The electric current input range is: 0～5A, voltage output range is: 0～10V, working power is: 24VDC, working temperature is: 0～60 °, the response time is :≤250ms, the direct current output accuracy is: ± 0.1%FS, the interchange output accuracy is: ± 0.2%FS.
Preferably, the model of described voltage transmitter is: KCE-VJ03-V4-4-D24; Input voltage range is: 0～250V, and voltage output range: 0～10V, working power is: 24VDC, working temperature is: 0～60 °, the response time is :≤250ms, the direct current output accuracy is: ± 0.1%FS, the interchange output accuracy is: ± 0.2%FS.
Preferably, the model of described power transducer is: CWQ-12-A5V2-5-V3-D2; The electric current input range is: 0～5A, and input voltage range is: 0～220V, incoming frequency is: 50Hz ± 3Hz, voltage output range is: 0～10V, and working power is: 24VDC, working temperature is: 0～60 °, response time is :≤250msec, consumed power is :≤4VA.
Can find out from above-mentioned technical scheme, the disclosed a kind of electric railway negative sequence compensation of the utility model system, by signal acquisition controller active power and the reactive power alternate according to electrical network three, calculate the electrical network three alternate amount of capacity that need compensation, and the magnet controlled reactor that the control of the amount of capacity of as required compensation is connected with the high-pressure side of electrical network is exported compensation capacity, the switching capacitance branch road that control is connected with the low-pressure side of electrical network provides idle, efficiently solve the negative sequence compensation problem of electric railway load, simultaneously by magnet controlled reactor directly is connected with the high-pressure side of electrical network, when compensating, need not to access again step-up transformer, reduced the floor space of bucking-out system, and compare with compensating at the single station of low-pressure side respectively, greatly reduce the installed capacity of bucking-out system.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the disclosed a kind of electric railway negative sequence compensation of the utility model embodiment system;
Fig. 2 is the structural representation of the disclosed a kind of electric railway negative sequence compensation of disclosed another embodiment of the utility model system;
Fig. 3 is the elementary diagram of the disclosed magnet controlled reactor of the utility model.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present utility model, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment discloses a kind of electric railway negative sequence compensation system, can be implemented in when electric railway carried out negative sequence compensation, reduces installed capacity and the floor space of bucking-out system.
As shown in Figure 1, for the disclosed a kind of electric railway negative sequence compensation of the utility model system, comprising: signal acquisition controller 101, magnet controlled reactor 102 and capacitor branch road 103; Wherein:
Magnet controlled reactor 102 is connected with the 110kV high-pressure side of electrical network;
Active power and reactive power that signal acquisition controller 101 is alternate according to electrical network three, calculating electrical network AB, BC, CA needs the amount of capacity that compensates mutually, and generates control capacitor branch road 103 according to result of calculation control signals idle and control magnet controlled reactor 102 output compensation capacities are provided.
In the above-described embodiments, magnet controlled reactor 102 is reactors that a kind of capacity can be regulated continuously, be divided into alternate current operation part and DC control part, the large I that changes the DC control electric current makes core of reactor be operated in different excitation magnetic state, and then the size of level and smooth adjusting operating current, export corresponding reactive capability and compensate.
The specific works principle of above-described embodiment is: by signal acquisition controller 101 active power and the reactive power alternate according to electrical network three, calculate the electrical network three alternate amount of capacity that need compensation, and generate the control signal of control switching capacitance branch road 103 and magnet controlled reactor 102 according to result of calculation.The magnet controlled reactor 102 that is connected with electrical network 110kV high-pressure side compensates electrical network according to the control signal output compensation capacity that signal acquisition controller 101 generates, the capacitor branch road 103 that is connected with electrical network 10kV low-pressure side carries out switching according to the control signal that signal acquisition controller 101 generates, and provides idle to electrical network.
In above-described embodiment, by magnet controlled reactor and switching capacitance branch road electrical network is compensated, solved the load problem of electric railway load, magnet controlled reactor directly compensates the high-pressure side of electrical network simultaneously, compare with compensating at the single station of low-pressure side respectively in the prior art, greatly system's installed capacity of reduction, and magnet controlled reactor can directly access the high-pressure side and compensate, and do not need by the step-up transformer access, greatly reduced the floor space of system.
As shown in Figure 2, for the disclosed a kind of electric railway negative sequence compensation of another embodiment of the utility model system, comprising: current transformer 201, voltage transformer 202, current transducer 203, voltage transmitter 204, power transducer 205, signal acquisition controller 206, magnet controlled reactor 207 and capacitor branch road 208; Wherein:
The magnet controlled reactor 207 that is connected with electrical network 110kV high-pressure side compensates electrical network according to the control signal output compensation capacity that signal acquisition controller 206 generates;
The capacitor branch road 208 that is connected with electrical network 10kV low-pressure side carries out switching according to the control signal that signal acquisition controller 206 generates, and provides idle to electrical network.
In the above-described embodiments, signal acquisition controller 206 is the PLC controller, and the PLC controller is practical flexibly, highly versatile, field adjustable are easy; Interface is simple, easy to maintenance, and stronger carrying load ability is arranged; Volume is little, lightweight, power consumption is little, cost performance is high; Adopt microelectric technique, a large amount of switch motions is finished by contactless memory electronic device, and most of relay and numerous and diverse line are replaced by software program, can adapt to the industry spot of various strong interference, and reliability is high.
In the above-described embodiments, the model of current transducer 203 is: KCE-IJ03-A6-4-D24; The electric current input range is: 0～5A, voltage output range is: 0～10V, working power is: 24VDC, working temperature is: 0～60 °, the response time is :≤250ms, the direct current output accuracy is: ± 0.1%FS, the interchange output accuracy is: ± 0.2%FS.
In the above-described embodiments, the model of voltage transmitter 204 is: KCE-VJ03-V4-4-D24; Input voltage range is: 0～250V, and voltage output range: 0～10V, working power is: 24VDC, working temperature is: 0～60 °, the response time is :≤250ms, the direct current output accuracy is: ± 0.1%FS, the interchange output accuracy is: ± 0.2%FS.
In the above-described embodiments, the model of power transducer 205 is: CWQ-12-A5V2-5-V3-D2; The electric current input range is: 0～5A, and input voltage range is: 0～220V, incoming frequency is: 50Hz ± 3Hz, voltage output range is: 0～10V, and working power is: 24VDC, working temperature is: 0～60 °, response time is :≤250msec, consumed power is :≤4VA.
As shown in Figure 3, all be wound with on each work iron core of magnet controlled reactor in above-described embodiment and exchange main winding and DC control coil, the DC control coil is powered by external power supply, has carried out electrical isolation between the main winding with exchanging, and has guaranteed the safety and reliability of magnet controlled reactor when work.The volume output of magnet controlled reactor is regulated, and is to regulate by the size of current that the angle of flow of signal acquisition controller control thyristor is regulated the DC control coil.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed 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 utility model.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. an electric railway negative sequence compensation system is characterized in that, comprising: signal acquisition controller, magnet controlled reactor and capacitor branch road; Wherein:
Described magnet controlled reactor is connected with the high-pressure side of electrical network;
Described capacitor branch road is connected with the low-pressure side of electrical network;
Described signal acquisition controller is connected with the capacitor branch road with described magnet controlled reactor respectively;
Active power and reactive power that described signal acquisition controller is alternate according to electrical network three, calculate the electrical network three alternate amount of capacity that need compensation, and provide control signal idle and the described magnet controlled reactor output of control compensation capacity according to the described capacitor branch road of result of calculation generation control.
2. system according to claim 1 is characterized in that, also comprises: current transformer, voltage transformer, current transducer, voltage transmitter and power transducer; Wherein:
Described current transformer is connected with the high-pressure side of electrical network, gathers the on high-tension side current signal of described electrical network, and the described current signal that will gather is sent to connected described current transducer and power transducer;
Described voltage transformer is connected with the high-pressure side of electrical network, gathers the on high-tension side voltage signal of described electrical network, and the described voltage signal that will gather is sent to connected described voltage transmitter and power transducer;
Described current transducer exports connected signal acquisition controller to after described current signal is changed;
Described voltage transmitter exports connected signal acquisition controller to after described voltage signal is changed;
Described power transducer exports connected signal acquisition controller to after with the conversion of described current signal and voltage signal;
Described signal acquisition controller calculates electrical network three alternate active power and reactive power according to the current signal after the conversion that receives and voltage signal.
3. system according to claim 1 and 2 is characterized in that, described signal acquisition controller is the PLC controller.
4. system according to claim 1 and 2 is characterized in that, described magnet controlled reactor is the magnet controlled reactor that main winding adopts delta connection.
5. system according to claim 2 is characterized in that, the model of described current transducer is: KCE-IJ03-A6-4-D24; The electric current input range is: 0～5A, voltage output range is: 0～10V, working power is: 24VDC, working temperature is: 0～60 °, the response time is :≤250ms, the direct current output accuracy is: ± 0.1%FS, the interchange output accuracy is: ± 0.2%FS.
6. system according to claim 2 is characterized in that, the model of described voltage transmitter is: KCE-VJ03-V4-4-D24; Input voltage range is: 0～250V, and voltage output range: 0～10V, working power is: 24VDC, working temperature is: 0～60 °, the response time is :≤250ms, the direct current output accuracy is: ± 0.1%FS, the interchange output accuracy is: ± 0.2%FS.
7. system according to claim 2 is characterized in that, the model of described power transducer is: CWQ-12-A5V2-5-V3-D2; The electric current input range is: 0～5A, and input voltage range is: 0～220V, incoming frequency is: 50Hz ± 3Hz, voltage output range is: 0～10V, and working power is: 24VDC, working temperature is: 0～60 °, response time is :≤250msec, consumed power is :≤4VA.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320283977 CN203251095U (en) | 2013-05-22 | 2013-05-22 | A negative sequence compensation system in electrified railways |
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| CN 201320283977 CN203251095U (en) | 2013-05-22 | 2013-05-22 | A negative sequence compensation system in electrified railways |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546752A (en) * | 2017-08-29 | 2018-01-05 | 中石化川气东送天然气管道有限公司 | A kind of SVG dynamic compensating systems and method |
| CN108923440A (en) * | 2018-09-12 | 2018-11-30 | 西南交通大学 | A kind of negative sequence compensation measure and control device of traction substation group, system and method |
| CN113035537A (en) * | 2021-03-22 | 2021-06-25 | 赵忠臣 | Pressure regulating type magnetic control phase modulator |
-
2013
- 2013-05-22 CN CN 201320283977 patent/CN203251095U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546752A (en) * | 2017-08-29 | 2018-01-05 | 中石化川气东送天然气管道有限公司 | A kind of SVG dynamic compensating systems and method |
| CN108923440A (en) * | 2018-09-12 | 2018-11-30 | 西南交通大学 | A kind of negative sequence compensation measure and control device of traction substation group, system and method |
| CN108923440B (en) * | 2018-09-12 | 2023-07-07 | 西南交通大学 | Negative sequence compensation measurement and control device, system and method for traction substation group |
| CN113035537A (en) * | 2021-03-22 | 2021-06-25 | 赵忠臣 | Pressure regulating type magnetic control phase modulator |
| CN113035537B (en) * | 2021-03-22 | 2023-09-26 | 赵忠臣 | Pressure regulating type magnetic control phase modulator |
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