CN103036235A - Electric railway electricity quality comprehensive treatment method based on electricity analysis program (ETAP) - Google Patents
Electric railway electricity quality comprehensive treatment method based on electricity analysis program (ETAP) Download PDFInfo
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- CN103036235A CN103036235A CN2012104905691A CN201210490569A CN103036235A CN 103036235 A CN103036235 A CN 103036235A CN 2012104905691 A CN2012104905691 A CN 2012104905691A CN 201210490569 A CN201210490569 A CN 201210490569A CN 103036235 A CN103036235 A CN 103036235A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The invention discloses an electric railway electricity quality comprehensive treatment method based on the electricity analysis program (ETAP). The electric railway electricity quality comprehensive treatment method based on the ETAP is used for coordinately treating all traction stations along a railway, a fiber channel (FC) type filter network and a reactive and negative sequence compensation network are connected with a traction variation low voltage side bus in parallel, and the FC type filter network and the reactive and negative sequence compensation network are configured while thoroughly utilizing the powerful electricity system simulation and calculation capacity of the ETAP. The electric railway electricity quality comprehensive treatment method is capable of achieving coordinate treatment of electricity quality of all traction stations along the railway, improves the accuracy of the simulation method, wholly estimates the treatment effect of the influence aspect when the electric railway is provided with a power grid, and further improves the more reasonable development of the high-speed electric railway.
Description
Technical field
The present invention relates to quality of power supply simulation technical field, be specifically related to a kind of power quality harnessed synthetically method that on the ETAP platform, electric railway is caused.
Background technology
ETAP (ElectricalTransientAnalysisProgram, the Transient-State Analysis of Power System program) is electric system simulation analysis, the calculating advanced applied software at full graphics interface, be widely used in generating electricity, the industrial system in the field such as transmission of electricity, distribution, than other power system simulation softwares, ETAP relies on its powerful simulation calculation ability to embody obvious advantage in quality of power supply emulation field.At present, simulation study for the power quality controlling aspect of electric railway, main by means of some professional power system simulation softwares, namely analyze mainly for single Traction Station, from the angle of integral body each Traction Station of Along Railway is not coordinated to administer, thereby can not systematically assess the regulation effect of compensation integral scheme aspect electric railway access electric network influencing, affect the fast development of electric railway.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, electrified railway electric energy quality comprehensive processing method based on ETAP is provided, realize the coordination improvement of each Traction Station quality of power supply of Along Railway, improved the accuracy of emulation mode, assess on the whole the regulation effect of compensation scheme aspect electric railway access electric network influencing, and then promote the more rational development of high-speed electric railway.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of electrified railway electric energy quality comprehensive processing method based on ETAP is characterized in that, comprises the steps:
Step (1) is carried out the ETAP modeling with whole electric railway place network, comprises generator, transformer, circuit, load and shunt capacitor force device;
Step (2) is to the single Traction Station in the whole electric railway, according to the harmonic current measured data analytical characteristic times harmonic of single Traction Station and traction load, Traction Station architectural characteristic, set up respectively the required FC type filter network in this single Traction Station and idle negative sequence compensation network, described FC type filter network comprises many group single tuning filter branch and one group of high-pass filtering branch road;
Tidal current analysis among step (3) the operation ETAP according to the first-harmonic capacitive reactive power in each single tuning filter branch of ETAP median filter capacity estimation functional configuration, is set up each single tuning filter branch;
Tidal current analysis among step (4) the operation ETAP is according to the parameter of reactive power compensation nargin configuration high pass damping filter branch;
Step (5) will be drawn side shunt compensation port and will be arranged in the traction load port, adopt 3 port compensation ways, access idle negative sequence compensation network at the compensation port;
Step (6) is moved the idle negative sequence compensation network among the ETAP, disposes the relevant parameter of ETAP simulation model, sets up the comprehensive compensation system of single Traction Station;
The modeling of ETAP simulation model is carried out to other traction substations in the whole electric railway in step (7) repeating step (2) ~ (6).
Aforesaid electrified railway electric energy quality comprehensive processing method based on ETAP is characterized in that: the comprehensive compensation system of the single Traction Station that step (6) is set up is installed in parallel the low-pressure side bus at the traction transformer of correspondence.
Aforesaid electrified railway electric energy quality comprehensive processing method based on ETAP, it is characterized in that: respectively organize the three-phase structure that filter branch all adopts the star-star connection mode, the three-phase structure of merit negative sequence compensation network using delta connection mode in step (2) the FC type filter network.
Aforesaid electrified railway electric energy quality comprehensive processing method based on ETAP is characterized in that: step (3) is set up each single tuned filter and is comprised the steps:
(1) moves the ETAP tidal current analysis, read the available data of traction load, comprise equivalent load capacity and existing power factor;
(2) nominal parameter of single tuned filter is set;
(3) single tuned filter capacity estimation type is made as the power factor correction mode, expects power factor behind the compensated setpoint;
(4) generate the single tuned filter configuration parameter.
Aforesaid electrified railway electric energy quality comprehensive processing method based on ETAP is characterized in that: the described traction load characteristic of step (2) is traction power supply arm measured current, and described Traction Station architectural characteristic is the traction transformer mode of connection.
Aforesaid electrified railway electric energy quality comprehensive processing method based on ETAP, it is characterized in that: the relevant parameter of the described configuration of step (6) ETAP simulation model, comprise that earthing type is made as the Δ type, reactive power compensation adopts alternate form and constant current ratio to be made as 100%.
The invention has the beneficial effects as follows: the electrified railway electric energy quality comprehensive processing method based on ETAP provided by the invention, all Traction Stations of Along Railway are coordinated to administer, FC type filter network and idle negative sequence compensation network are connected in parallel on traction low pressure side bus, and take full advantage of the powerful electric system simulation of ETAP and computing capability, dispose FC type filter network and idle negative sequence compensation network.Electrified railway electric energy quality comprehensive processing method of the present invention, can realize the coordination improvement of each Traction Station quality of power supply of Along Railway, improved the accuracy of emulation mode, assess on the whole the regulation effect of compensation scheme aspect electric railway access electric network influencing, and then promote the more rational development of high-speed electric railway.
Description of drawings
Fig. 1 is the structural representation of traction substation power quality comprehensive compensation system of the present invention.
Fig. 2 is the ETAP model of traction substation power quality comprehensive compensation system of the present invention.
Fig. 3 is comparison diagram before and after the total percent harmonic distortion of each Traction Station bus of Beijing-Shanghai High-Speed Railway is administered.
Fig. 4 is comparison diagram before and after each Traction Station bus imbalance of three-phase voltage degree of Beijing-Shanghai High-Speed Railway is administered.
Embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
Electrified railway electric energy quality comprehensive processing method based on ETAP provided by the invention, all Traction Stations of Along Railway are coordinated to administer, FC type filter network and idle negative sequence compensation network are connected in parallel on traction low pressure side bus, and take full advantage of the powerful electric system simulation of ETAP and computing capability, configuration FC type filter network and idle negative sequence compensation network, the specific implementation step is as follows:
The first step is carried out the ETAP modeling with whole electric railway place network, comprises generator, transformer, circuit, load and shunt capacitor force device;
Second step, to the single Traction Station in the whole electric railway, according to the harmonic current measured data analytical characteristic times harmonic of single Traction Station and traction load, Traction Station architectural characteristic, set up respectively the required FC type filter network in this single Traction Station and idle negative sequence compensation network, described FC type filter network comprises many group single tuning filter branch and one group of high-pass filtering branch road;
Wherein respectively organize the three-phase structure that filter branch all adopts the star-star connection mode in the FC type filter network, the three-phase structure of merit negative sequence compensation network using delta connection mode, the traction load characteristic is traction power supply arm measured current, the Traction Station architectural characteristic is the traction transformer mode of connection, here of the present inventionly be not limited to the mode of connection of traction transformer based on the electrified railway electric energy quality comprehensive processing method of ETAP, for general;
In the 3rd step, the tidal current analysis among the operation ETAP according to the first-harmonic capacitive reactive power in each single tuning filter branch of ETAP median filter capacity estimation functional configuration, is set up each single tuning filter branch, comprises the steps:
(1) moves the ETAP tidal current analysis, read the available data of traction load, comprise equivalent load capacity and existing power factor;
(2) nominal parameter of single tuned filter is set;
(3) single tuned filter capacity estimation type is made as the power factor correction mode, expects power factor behind the compensated setpoint;
(4) generate the single tuned filter configuration parameter;
In the 4th step, the tidal current analysis among the operation ETAP is according to the parameter of reactive power compensation nargin configuration high pass damping filter branch;
The 5th step, will draw side shunt compensation port and be arranged in the traction load port, adopt 3 port compensation ways, access idle negative sequence compensation network at the compensation port;
The 6th step, dispose the relevant parameter of idle negative sequence compensation network ETAP simulation model, set up the comprehensive compensation system of single Traction Station, and comprehensive compensation system is installed in parallel low-pressure side bus at the traction transformer of correspondence, here dispose the relevant parameter of ETAP simulation model, comprise that earthing type is made as the Δ type, reactive power compensation adopts alternate form and constant current ratio to be made as 100%.
The below is according to an embodiment of electrified railway electric energy quality comprehensive processing method of the present invention, specific as follows, this embodiment carries out the comprehensive regulation to Beijing-Shanghai High-Speed Railway (Jiangsu Section) at the power quality problem that Jiangsu Power Grid causes, Beijing-Shanghai High-Speed Railway (Jiangsu Section) is established Xu Zhoudong completely, Nan Jingnan, lower another name for Sichuan Province, Danyang, Zheng Lu, the Wuxi, 7 traction substations in Kunshan, each adopts three-phase V/v type traction change to incorporate the 220kV electric pressure into, low-pressure side voltage is 27.5kV, the method of layering and zoning is adopted in Jiangsu Power Grid ETAP modeling, with 220kV and the above network main frame as modeling, the following network equivalent of 220kV is load; With the composite network module transformer station and station, power plant are encapsulated, concrete equipment such as the models such as transformer, bus, load, capacity reactance and generator are set up in each composite network inside, and bus is connected to composite network to external terminal, different composite networks connect by AC transmission line.
Here take Traction Station, east, Xuzhou as example, comprehensive compensation system comprises FC filter network and idle negative sequence compensation network two parts, as shown in Figure 1, the FC filter network comprises that each filter branch adopts the three-phase structure of star-star connection mode, the three-phase structure of idle negative sequence compensation network using delta connection mode, and comprehensive compensation system is installed in parallel at the traction transformer low-pressure side bus.
As shown in Figure 2, for the ETAP simulation model of Traction Station, east, Xuzhou comprehensive compensation system, realize comprising the steps:
(1) according to the measured data of Beijing-Shanghai express railway harmonic current containing ratio, analyze and obtain its feature times harmonic and comprise 5 times, 7 times, 11 times, 13 inferior, and higher harmonic content is abundant, so filters solutions adopts four groups of single tuned filters and one group of high pass filter;
(2) be designed to example with 5 single tuned filters: based on the ETAP platform, switch to first the tidal current analysis module, it is 87.9% that the operation tidal current analysis obtains drawing the existing power factor of low pressure side bus, and volume load is 131.28MVA; Add one group of single tuned filter, earthing type is made as the Y type; The nominal parameter of filter is set, estimate in the edit box in filter capacity, it is 24.76A that 5 subharmonic currents are set, existing power factor is 87.9%, the expectation power factor is 88.9%, and load capacity is 131.28MVA, after power factor is proofreaied and correct, can automatically obtain the parameter of 5 single tuned filters: single-phase kilovar value=3055kvar of capacitor, inductive reactance=3.3 Europe/phase;
(3) 7 times, the ETAP modeling method of 11 times, 13 times single tuned filters are similar with (2), just do not introduce one by one here;
(4) design high pass filter: based on the ETAP platform, switch to first the tidal current analysis module, it is 94.77% that the operation tidal current analysis obtains drawing low pressure side bus power factor, and volume load is 118.17MVA; Add one group of high pass (damping) filter, earthing type is made as the Y type; Selecting single condenser capacity is 5Mvar, and the cut-off times N is made as 16, and obtaining inductive reactance by the high pass filter principle is 0.2954 Ω, and resistance is 3.1510 Ω;
(5) the idle negative sequence compensation Mathematical Modeling of counting network adopts shown in formula (1),
In the formula, I
4, I
5, I
6Be the compensation port current; K
CBe the reactive power compensation degree; K
NBe the negative sequence compensation degree; I
pLoad current for trailer system; ψ
pBe U
pHysteresis U
APhase angle;
Be port p electric current I
pHysteresis port voltage U
pPower-factor angle;
(6) determine the structural parameters of Traction Station, Xuzhou east: Traction Station, east, Xuzhou adopts the wiring of V/v type, traction load port phase sequence be respectively CA ,-AB, take the A phase voltage as the reference voltage phase place, the CA line angle that joins is 210 °, the AB line angle that joins is 330 °; Determine the traction load characterisitic parameter: two supply arm arm load currents are respectively 1030A and 2212A, and power factor is 0.85;
(7) on traction load nature port one, 2,3, arrange respectively shunt compensation port 4,5,6, ψ
1=ψ
4=210 °, ψ
2=Ψ
5=330 ° of (hysteresis ψ
1), ψ
3=Ψ
6=90 ° of (leading ψ
1), establish traction load at port one, 2, and port 3 traction loads are 0; Select compensator control parameter: reactive power compensation degree K
CBe made as 0.5, negative sequence compensation degree K
NBe made as 1; Calculate alternate reactive power compensation electric current according to the idle negative phase-sequence comprehensive compensation of formula (1) model, be converted into alternate reactive compensation power:
Q
ca＝31.7381Mvar,
Q
ab=-25.1745Mvar,
Q
bc=-15.4345Mvar。
(8) adopt the idle negative sequence compensation network of uncompensated load modeling among the ETAP, as follows according to Mathematical Modeling characteristics configuration ETAP simulation parameters: the constant current ratio is made as 100%, earthing type is made as the Δ type, with the alternate power parameter of reactive compensation power as uncompensated load;
(9) the power quality harnessed synthetically system that adopts above-mentioned (1)-(8) that Beijing-Shanghai high speed is fallen other Traction Stations, road (Jiangsu Section) carries out the ETAP simulation modeling, simulation analysis obtains, total percent harmonic distortion of each Traction Station 220kV bus as shown in Figure 3 before and after administering, it is slightly poor to find out except Traction Station, east, Xuzhou regulation effect, substantially all is controlled at below 0.1% after other Traction Station buses are administered; The imbalance of three-phase voltage degree of each Traction Station 220kV bus can be found out after each Traction Station bus is administered substantially all to be controlled at below 0.1% as shown in Figure 4 before and after administering, and has verified that the present invention puies forward the validity of electric railway harmonics and negative sequence improvement method.
More than show and described basic principle of the present invention, principal character and advantage.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (6)
1. the electrified railway electric energy quality comprehensive processing method based on ETAP is characterized in that, comprises the steps:
Step (1) is carried out the ETAP modeling with whole electric railway place network, comprises generator, transformer, circuit, load and shunt capacitor force device;
Step (2) is to the single Traction Station in the whole electric railway, according to the harmonic current measured data analytical characteristic times harmonic of single Traction Station and traction load, Traction Station architectural characteristic, set up respectively the required FC type filter network in this single Traction Station and idle negative sequence compensation network, described FC type filter network comprises many group single tuning filter branch and one group of high-pass filtering branch road;
Tidal current analysis among step (3) the operation ETAP according to the first-harmonic capacitive reactive power in each single tuning filter branch of ETAP median filter capacity estimation functional configuration, is set up each single tuning filter branch;
Tidal current analysis among step (4) the operation ETAP is according to the parameter of reactive power compensation nargin configuration high pass damping filter branch;
Step (5) will be drawn side shunt compensation port and will be arranged in the traction load port, adopt 3 port compensation ways, access idle negative sequence compensation network at the compensation port;
Step (6) is moved the idle negative sequence compensation network among the ETAP, disposes the relevant parameter of ETAP simulation model, sets up the comprehensive compensation system of single Traction Station;
The modeling of ETAP simulation model is carried out to other traction substations in the whole electric railway in step (7) repeating step (2) ~ (6).
2. the electrified railway electric energy quality comprehensive processing method based on ETAP according to claim 1 is characterized in that: the comprehensive compensation system of the single Traction Station that step (6) is set up is installed in parallel the low-pressure side bus at the traction transformer of correspondence.
3. the electrified railway electric energy quality comprehensive processing method based on ETAP according to claim 1, it is characterized in that: respectively organize the three-phase structure that filter branch all adopts the star-star connection mode, the three-phase structure of merit negative sequence compensation network using delta connection mode in step (2) the FC type filter network.
4. the electrified railway electric energy quality comprehensive processing method based on ETAP according to claim 1, it is characterized in that: step (3) is set up each single tuned filter and is comprised the steps:
(1) moves the ETAP tidal current analysis, read the available data of traction load, comprise equivalent load capacity and existing power factor;
(2) nominal parameter of single tuned filter is set;
(3) single tuned filter capacity estimation type is made as the power factor correction mode, expects power factor behind the compensated setpoint;
(4) generate the single tuned filter configuration parameter.
5. the electrified railway electric energy quality comprehensive processing method based on ETAP according to claim 1, it is characterized in that: the described traction load characteristic of step (2) is traction power supply arm measured current, and described Traction Station architectural characteristic is the traction transformer mode of connection.
6. the electrified railway electric energy quality comprehensive processing method based on ETAP according to claim 1, it is characterized in that: the relevant parameter of the described configuration of step (6) ETAP simulation model, comprise that earthing type is made as the Δ type, reactive power compensation adopts alternate form and constant current ratio to be made as 100%.
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| CN109066718A (en) * | 2018-09-12 | 2018-12-21 | 西南交通大学 | A kind of negative sequence compensation devices and methods therefor of electric railway cophase supply transformer substation system |
| CN109116102A (en) * | 2018-08-08 | 2019-01-01 | 贵州电网有限责任公司 | A kind of electric railway power factor metering method based on operating mode's switch |
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