CN104155553B - Locomotive electric power feedback equipment test system and test method - Google Patents
Locomotive electric power feedback equipment test system and test method Download PDFInfo
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- CN104155553B CN104155553B CN201410398420.XA CN201410398420A CN104155553B CN 104155553 B CN104155553 B CN 104155553B CN 201410398420 A CN201410398420 A CN 201410398420A CN 104155553 B CN104155553 B CN 104155553B
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Abstract
The invention discloses a locomotive regenerative electric power feedback equipment test system. The test system is composed of two electric power feedback inverters and a three-winding feedback transformer. Direct-current buses of the two electric power feedback inverters are connected in parallel. The primary side of the three-winding feedback transformer is connected with a power grid, and the two secondary windings are respectively connected with alternating-current outputs of the two electric power feedback inverters. The invention further discloses a test method of the test system. The voltage of the direct-current bus of one electric power feedback inverter is increased under control to simulate the locomotive braking condition, and the other electric power feedback inverter feeds electric power back to the power grid when detecting direct-current voltage rise. The control logic and the power transmission capacity of the electric power feedback inverters can be tested. The method is low in cost, simple and practical, and high in test efficiency.
Description
Technical field
The present invention relates to a kind of locomotive electric energy feedback equipment test system and test method, belong to high-power electric electricity
Equipment field tests in sub-technology.
Background technology
The absorption of locomotive electric energy feedback equipment regenerative electric energy in track traffic and the occasion of feedback, by regenerating
Electric energy feedback is to electrical network.
The principle of regenerative electric energy feedback equipment can be summarized as follows: when vehicle enters damped condition, and the kinetic energy of locomotive turns
It is changed to electric energy, when direct current network input electric energy, direct current network voltage can be caused to raise.Regenerative electric energy feedback sets
Standby control system detects direct current network voltage in real time, when the rising of direct current network voltage reaches a certain preset value,
Inverter starts to start, and inverter controls output electric current with the difference of actual direct current network voltage with reference value,
Until output electric current reaches the maximum allowable output electric current of inverter, inverter is to AC network feedback electric energy, directly
Stream line voltage will have a declining tendency.After vehicle completes braking, direct current network voltage drop declines, and returns to
Normal value, regenerative electric energy feedback equipment returns to resting state.Therefore, regenerative electric energy feedback equipment is not only able to
Direct current network voltage is maintained to keep stable, moreover it is possible to by unnecessary electric energy feedback to AC network.Track traffic industry
Hanging net operation equipment is had strict requirements, needs comprehensively to test going out plant, and detect locomotive electrical
Can need to construct an operating mode simulating true electric power supply system for subway by feedback equipment, need one adjustable high-power
Direct voltage source, raises with analog DC line voltage, in addition it is also necessary to construct returning electric energy feedback to AC network
Road.The test platform meeting above-mentioned requirements is relatively costly.
Summary of the invention
It is an object of the invention to: propose the test platform of a kind of locomotive electric energy feedback equipment and use this test to put down
The method of platform, to meet the demand to the test of locomotive electric energy feedback equipment.
Concrete scheme is as follows:
A kind of locomotive electric energy feedback equipment test system, becomes including two electric energy feedback inverters and three winding feedback
Depressor.The dc bus of two electric energy feedback inverters is connected in parallel, the former limit of three winding fly-back transformer and electricity
Net connects, and two groups of vice-side winding export with the exchange of two electric energy feedback inverters respectively and are connected.
In such scheme, electric energy feedback inverter includes DC bus capacitor, AC/DC convertor, alternating current filter
And grid-connected switch.Wherein said AC/DC convertor can realize the conversion between alternating current and unidirectional current.
Additionally the present invention also provides for a kind of test method using described pilot system, described test method include as
Lower step:
Step 1: start the first electric energy feedback inverter, and to control DC bus-bar voltage be the first setting value.
Step 2: the DC bus-bar voltage controlling the first electric energy feedback inverter rises, and Control of Voltage target is the
Two setting values.
Step 3: after the second electric energy feedback inverter detects that DC voltage is more than the 3rd setting value, starts to start,
Control of Voltage target is the first setting value.
Step 4: after waiting DC voltage stability, and lasting special time, control the first electric energy feedback inverter
DC bus-bar voltage decline, Control of Voltage target is the first setting value, until DC voltage stability sets first
Definite value.The scope of described special time is between 5 seconds and 30 seconds.
In such scheme, in described test method the first setting value of DC voltage be less than the 3rd setting value, the 3rd
Setting value is less than the second setting value.
Beneficial effect:
1, an electric energy feedback equipment is as test equipment, and continuously adjustable DC voltage, according to testing requirement
Set the adjustment curve of DC voltage, meet any measurement condition, convenient flexibly.
2, test platform is made up of two identical electric energy feedback equipment, wherein one can as test equipment,
Simulation subway DC bus-bar voltage raises, and another is as equipment under test, it is also possible to by test equipment with tested set
Standby mutually exchange, it is not necessary to increase extra cost and just can realize the test of two electric energy feedback equipment, cost
Low, testing efficiency is high.
3, the active power flow direction of two electric energy feedback equipment is contrary, and two equipment define active power
Inside circulation.The overall loss of test platform is the least.
Accompanying drawing explanation
Fig. 1 is the locomotive electric energy feedback equipment test platform topology figure of the present invention
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Figure 1: label title in figure: 1, the first electric energy feedback equipment；2, the second electric energy feedback equipment；
3, three winding fly-back transformer；4, the first active power flow direction；5, the second active power flow direction.
A set of locomotive electric energy feedback equipment test system, becomes including two electric energy feedback inverters and three winding feedback
Depressor (3).The dc bus of two electric energy feedback inverters is connected in parallel, the former limit of three winding fly-back transformer
Being connected with electrical network, two groups of vice-side winding export with the exchange of two electric energy feedback inverters respectively and are connected.
Electric energy feedback inverter includes DC bus capacitor, AC/DC convertor, alternating current filter and grid-connected switch.
Wherein said AC/DC convertor can realize the conversion between alternating current and unidirectional current.Ac-dc conversion in this example
Device is the inverter of three-phase half-bridge structure.In this example, three-winding transformer original edge voltage is 35KV, double winding
Secondary voltage be 950V, in this example, the first electric energy feedback equipment (1) is as test equipment, and regulation is straight
Stream capacitance voltage, the second electric energy feedback equipment (2) is as equipment under test.
Use the test method of above-mentioned pilot system, comprise the steps:
Step 1: start the first electric energy feedback inverter, and to control DC bus-bar voltage be 1500V.
Step 2: the DC bus-bar voltage controlling the first electric energy feedback inverter rises, and Control of Voltage target is
1800V.The climbing speed arranging DC bus-bar voltage is 300V per second.This step analog DC electrical network direct current
Voltage rises operating mode.
Step 3: DC voltage starts to be gradually increasing according to regulations speed, sets the second electric energy feedback inverter
Enabling gate threshold value is 1600V, and after detecting that DC voltage is more than 1600V, the second electric energy feedback equipment is opened
Beginning to start, Control of Voltage target is 1500V.
The dc-link capacitance of two electric energy feedback inverters is in parallel, two electric energy feedback inverter DC capacitor electricity
Voltage-controlled target processed is different, and two inverters are all unable to reach control target, and two inverters will export maximum current,
Final DC capacitor voltage will stabilise between 1500V-1800V, if two electric energy feedback inverters have been
Exactly the same, DC voltage will stabilise at 1650V.
Now, the actual DC voltage 1650V of the first electric energy feedback inverter is less than Control of Voltage target 1800V,
Therefore, the first feedback inversion transformation device is in the duty to DC capacitor charging.Active power flow direction is (4).
The actual DC voltage 1650V of the second electric energy feedback inverter is higher than Control of Voltage target 1500V, therefore,
Second feedback inversion transformation device is in the duty of DC capacitor electric discharge.Active power flow direction is (5).Now,
The active power flow direction of two inverters is contrary, cancels out each other, the wattful power that the former limit of AC transformer consumes
Rate is the least.
After waiting DC voltage stability, and lasting special time, the scope of described special time was at 5 seconds and 30
Between Miao, this time is the time in order to simulate locomotive skidding, in the present embodiment, set the time as
10s.The DC bus-bar voltage controlling the first electric energy feedback inverter after 10s declines, and Control of Voltage target is
1500V, now the DC voltage control target of two inverters is consistent, is 1500V, DC capacitor voltage
Fall is stable does not have the transmission of active power at 1500V, and test completes.Finally simulate locomotive brake braking,
The whole process of electric energy feedback.Test equipment achieves the process rising actual DC line voltage and returning.
Equipment under test completes the detection to direct current network voltage, automatically starts and feeds back to exchange with maximum output current
The process of electrical network.Two equipment can also be exchanged, and is mutually authenticated.
When testing according to above-mentioned testing procedure, the first electric energy feedback inverter control DC bus-bar voltage rises,
Being to charge to DC capacitor, active power flow direction is to DC capacitor by the secondary of AC transformer, second
The control target of electric energy feedback equipment is to make DC bus-bar voltage decline, and is equivalent to DC capacitor electric discharge, wattful power
Rate flow direction is to AC transformer secondary by DC capacitor.Owing to the double winding of AC transformer secondary has
Merit power flow direction is contrary, cancels out each other, and the active power that therefore the former limit of AC transformer consumes is the least.
Above example is merely to illustrate technical scheme and is not intended to limit, and enters with reference to above-described embodiment
The various forms amendment of row or change are all within protection scope of the present invention.
Claims (2)
1. using a test method for locomotive electric energy feedback equipment test system, described electric energy feedback equipment tries
Check system, including two electric energy feedback inverters and three winding fly-back transformer, wherein two electric energy feedback inversions
The dc bus of device is connected in parallel, and the former limit of three winding fly-back transformer is connected with electrical network, and two groups of vice-side winding divide
Do not export with the exchange of two electric energy feedback inverters and be connected, it is characterised in that: described test method includes as follows
Step:
Step 1: start the first electric energy feedback inverter, and to control DC bus-bar voltage be the first setting value；
Step 2: the DC bus-bar voltage controlling the first electric energy feedback inverter rises, and Control of Voltage target is the
Two setting values；
Step 3: after the second electric energy feedback inverter detects that DC voltage is more than the 3rd setting value, starts to start,
Control of Voltage target is the first setting value；
Step 4: after waiting DC voltage stability, and lasting special time, control the first electric energy feedback inverter
DC bus-bar voltage decline, Control of Voltage target is the first setting value, until DC voltage stability sets first
Definite value；The scope of described special time is between 5 seconds to 30 seconds.
2. test method as claimed in claim 1, it is characterised in that: DC voltage in described test method
The first setting value less than the 3rd setting value, the 3rd setting value is less than the second setting value.
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| CN201410398420.XA CN104155553B (en) | 2014-08-13 | 2014-08-13 | Locomotive electric power feedback equipment test system and test method |
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| CN201410398420.XA CN104155553B (en) | 2014-08-13 | 2014-08-13 | Locomotive electric power feedback equipment test system and test method |
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| CN104155553B true CN104155553B (en) | 2017-01-11 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106093628B (en) * | 2016-06-01 | 2019-03-08 | 国电南京自动化股份有限公司 | A kind of regenerative braking energy feedback current transformer testing method |
| CN106771720B (en) * | 2016-11-30 | 2019-12-06 | 南京南瑞继保电气有限公司 | test method for simulating subway environment by locomotive regenerative electric energy feedback equipment |
| CN109298255A (en) * | 2017-07-24 | 2019-02-01 | 株洲中车时代电气股份有限公司 | A kind of subway energy feedback current transformer power examination test system and method |
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| JPH0678408A (en) * | 1992-08-25 | 1994-03-18 | Nippondenso Co Ltd | Electric circuit equipment for electric vehicle |
| CN101071162A (en) * | 2007-06-29 | 2007-11-14 | 株洲南车时代电气股份有限公司 | Current converter test circuit |
| CN101249806A (en) * | 2008-04-14 | 2008-08-27 | 北京交通大学 | Modular energy feedback type traction power set and control method |
| CN201548626U (en) * | 2009-09-23 | 2010-08-11 | 中国北车股份有限公司大连电力牵引研发中心 | Electric transmission test device for AC-DC-AC traction converter |
| CN202633964U (en) * | 2012-04-06 | 2012-12-26 | 北京千驷驭电气有限公司 | Energy-fed type traction substation and power supply system |
| CN102983634A (en) * | 2012-12-27 | 2013-03-20 | 湖南恒信电气有限公司 | Capacitor-inverter absorption method for regenerative braking energy of vehicle |
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2014
- 2014-08-13 CN CN201410398420.XA patent/CN104155553B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0678408A (en) * | 1992-08-25 | 1994-03-18 | Nippondenso Co Ltd | Electric circuit equipment for electric vehicle |
| CN101071162A (en) * | 2007-06-29 | 2007-11-14 | 株洲南车时代电气股份有限公司 | Current converter test circuit |
| CN101249806A (en) * | 2008-04-14 | 2008-08-27 | 北京交通大学 | Modular energy feedback type traction power set and control method |
| CN201548626U (en) * | 2009-09-23 | 2010-08-11 | 中国北车股份有限公司大连电力牵引研发中心 | Electric transmission test device for AC-DC-AC traction converter |
| CN202633964U (en) * | 2012-04-06 | 2012-12-26 | 北京千驷驭电气有限公司 | Energy-fed type traction substation and power supply system |
| CN102983634A (en) * | 2012-12-27 | 2013-03-20 | 湖南恒信电气有限公司 | Capacitor-inverter absorption method for regenerative braking energy of vehicle |
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