CN103487675A - Ageing experiment system and method for static dynamic reactive power adjusting devices - Google Patents
Ageing experiment system and method for static dynamic reactive power adjusting devices Download PDFInfo
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- CN103487675A CN103487675A CN201310277369.2A CN201310277369A CN103487675A CN 103487675 A CN103487675 A CN 103487675A CN 201310277369 A CN201310277369 A CN 201310277369A CN 103487675 A CN103487675 A CN 103487675A
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Abstract
The invention discloses an ageing experiment system and method for static dynamic reactive power adjusting devices. The ageing experiment system comprises the two static dynamic reactive power adjusting devices which are connected with a 10Kv power grid, H bridge inversion units in all cascading units are sequentially connected in series, the head end of each cascading unit is connected with an electric reactor, and the tail ends of all the cascading units are connected. The ageing experiment method includes the following steps that wiring is completed, the first static dynamic reactive power adjusting device and the second static dynamic reactive power adjusting device operate, the current value of a 10Kv switch cabinet is observed, the operation steps are repeated until the two static dynamic reactive power adjusting devices operate to a rated current, and finally the two static dynamic reactive power adjusting devices are shut down. The ageing experiment system and method can solve the problem that the rated power of the two static dynamic reactive power adjusting devices is aged under the condition that limits exist in power grid capacity and a reactive load current in a plant, hardware cost increasing or single program downloading are not needed, commissioning is easy and convenient, and the ageing experiment system and method are easy to popularize.
Description
Technical field
The present invention relates to a kind of senile experiment system and experimental technique, relate in particular to a kind of silent oscillation dynamic reactive and regulate senile experiment system and experimental technique.
Background technology
The further deterioration of the 'bottleneck' restrictions of fossil energy and ecologic environment, make the development of energy-conserving and emission-cutting technology be subject to extensive concern.The chained convert device is because it is simple in structure, modularization, in high-power, mesohigh drive system, is used widely.In recent years, along with the increase day by day of the renewable energy system grid connection capacities such as wind-power electricity generation, need to the power electronic equipment that can carry out the dynamic reactive power adjusting be installed at the grid-connected place of these systems and solve its grid-connected power quality problem brought.Therefore, chained convert device topology is applied to the research of middle pressure, large capacity silent oscillation dynamic reactive-load adjusting device also increasingly extensive.But, along with the silent oscillation dynamic reactive-load adjusting device during towards larger capacity future development, due to the restriction of electrical network rated capacity and reactive load in factory, make the senile experiment condition of silent oscillation dynamic reactive-load adjusting device before dispatching from the factory can not meet silent oscillation dynamic reactive-load adjusting device aging of more high-power grade.The senile experiment means of currently available technology be the industrial frequency reactor load of silent oscillation dynamic reactive-load adjusting device band and to electrical network transmitting portion perception idle aging techniques, but the maximum aging current of silent oscillation dynamic reactive-load adjusting device is net capacity rated current sum in the rated current of reactor and factory, if be greater than in factory the silent oscillation dynamic reactive-load adjusting device of net capacity rated current sum in load or burden without work rated current and factory so produce, just can't realize rated power operation to the silent oscillation dynamic reactive-load adjusting device before dispatching from the factory, so just can't verify the overall performance of this silent oscillation dynamic reactive-load adjusting device under rated current.
Summary of the invention
The object of the present invention is to provide a kind of silent oscillation dynamic reactive to regulate senile experiment system and experimental technique, solve the shortcoming that prior art exists.
The present invention adopts following technical scheme to realize:
A kind of senile experiment system of silent oscillation dynamic reactive-load adjusting device, it is characterized in that, comprise two silent oscillation dynamic reactive-load adjusting devices, described silent oscillation dynamic reactive-load adjusting device is connected with the 10kv electrical network, comprise the U phase in the silent oscillation dynamic reactive-load adjusting device, the cascade unit of V phase and W phase, the three-phase cascade forms Y-connection between unit, comprise H bridge inversion unit and capacitor group in described cascade unit, H bridge inversion unit in each cascade unit is connected successively, the head end of each cascade unit is connected with a reactor, the end of each cascade unit is connected, described capacitance group is connected with the DC bus in H bridge inversion unit.
Further, described H bridge inversion unit is comprised of four igbts or integrated gate commutated thyristor, igbt or integrated gate commutated thyristor become bridge-type to connect, the head end of first H bridge inversion unit in each cascade unit is connected with described reactor, and the end of last H bridge inversion unit of each cascade unit is connected with the end of last H bridge inversion unit in other cascade unit.
Further, also comprise charge circuit, low-tension supply, step-up transformer, isolating switch and disconnector in the senile experiment system, an end of described reactor is connected with corresponding cascade unit respectively, and the other end of reactor is connected with three isolating switchs respectively; One end of charge circuit is connected with the three-phase of low-tension supply respectively, and the other end of charge circuit is connected with the Secondary Winding of step-up transformer respectively; The Secondary Winding of step-up transformer is connected with the three-phase of charge circuit, and a winding of step-up transformer is connected with the other end of reactor respectively; One end of three isolating switchs is connected with corresponding three reactors respectively, and the other end of three isolating switchs is connected with corresponding disconnector respectively; One end of three disconnectores is connected with corresponding three isolating switchs respectively, and the other end of three disconnectores is connected with three of electrical network respectively.
A kind of senile experiment method of silent oscillation dynamic reactive-load adjusting device is characterized in that the method comprises the steps:
1) complete the wiring of silent oscillation dynamic reactive-load adjusting device rated power senile experiment platform, two silent oscillation dynamic reactive-load adjusting devices are all and in the 10KV switch cubicle.And corresponding voltage, current sampling signal are sent in master control system separately;
2) operation First silent oscillation dynamic reactive-load adjusting device, make this silent oscillation dynamic reactive-load adjusting device send the capacitive reactive power electric current; Observe the current value of 10KV switch cubicle, in current value approaches factory, during electrical network rated capacity current value, move second silent oscillation dynamic reactive-load adjusting device, make this silent oscillation dynamic reactive-load adjusting device send perceptual reactive current;
3) again observe the current value of 10KV switch cubicle, when inflow 10KV switch cubicle current value approaches 0, again increase the capacitive reactive power current value that First silent oscillation dynamic reactive-load adjusting device sends; Now, again observe the current value of 10KV switch cubicle, in current value approaches factory, during electrical network rated capacity current value, increase the perceptual reactive current value that second silent oscillation dynamic reactive-load adjusting device sends; Repeat above operation steps, until two silent oscillation dynamic reactive-load adjusting devices are run to rated current;
4) shut down: alternately reduce the current value of two silent oscillation dynamic reactive-load adjusting devices, until two silent oscillation dynamic reactive-load adjusting device current values are reduced to 0, now, two silent oscillation dynamic reactive-load adjusting devices stop exporting and shutting down.
The useful technique effect that the present invention possesses is: can solve in the situation that in factory net capacity and reactive load electric current have the aging problem of restriction silent oscillation dynamic reactive-load adjusting device rated power; Can realize the purpose of silent oscillation dynamic reactive-load adjusting device saves energy, raising power factor in ageing process, only need electrical network to provide the active loss of silent oscillation dynamic reactive-load adjusting device to get final product; Evaded part due to the risk that can't reach silent oscillation dynamic reactive-load adjusting device that rated current is aging and break down at the scene, the problem such as generate heat when flowing through large electric current as some interface unit serious; Without increasing hardware cost, without downloading separately, debug convenient and simplely, be easy to popularization of the present invention.
The accompanying drawing explanation
Fig. 1 is the wiring diagram of the honest check system of the present invention.
Fig. 2 is the structural drawing of a silent oscillation dynamic reactive-load adjusting device of the present invention.
Fig. 3 is system algorithm control block diagram of the present invention.
Fig. 4 is the grid-connected point voltage that utilizes the present invention to obtain and the analogous diagram that flows into the power network current waveform.
Fig. 5 is grid-connected point voltage and the First silent oscillation dynamic reactive-load adjusting device output current wave analogous diagram of utilizing senile experiment system of the present invention to obtain.
Fig. 6 is grid-connected point voltage and second the silent oscillation dynamic reactive-load adjusting device output current wave analogous diagram of utilizing system of the present invention to obtain.
Embodiment
By the following description to embodiment; to more contribute to public understanding the present invention; but specific embodiment that can't the applicant is given is considered as the restriction to technical solution of the present invention, any definition to parts or technical characterictic changed and/or to one-piece construction do form and immaterial conversion all should be considered as the protection domain that technical scheme of the present invention limits.
At Fig. 1 with in Fig. 2: the silent oscillation dynamic reactive-load adjusting device is connected with the 10kv electrical network, the cascade unit that comprises U phase, V phase and W phase in the silent oscillation dynamic reactive-load adjusting device, the three-phase cascade forms Y-connection between unit, comprise H bridge inversion unit and capacitor group in the cascade unit, H bridge inversion unit in each cascade unit is connected successively, the head end of each cascade unit is connected with a reactor, and the end of each cascade unit is connected, and capacitance group is connected with the DC bus in H bridge inversion unit.H bridge inversion unit is comprised of four igbts or integrated gate commutated thyristor, igbt or integrated gate commutated thyristor become bridge-type to connect, the head end of first H bridge inversion unit in each cascade unit is connected with described reactor, and the end of last H bridge inversion unit of each cascade unit is connected with the end of last H bridge inversion unit in other cascade unit.
Also comprise charge circuit, low-tension supply, step-up transformer, isolating switch and disconnector in the senile experiment system, an end of described reactor is connected with corresponding cascade unit respectively, and the other end of reactor is connected with three isolating switchs respectively; One end of charge circuit is connected with the three-phase of low-tension supply respectively, and the other end of charge circuit is connected with the Secondary Winding of step-up transformer respectively; The Secondary Winding of step-up transformer is connected with the three-phase of charge circuit, and a winding of step-up transformer is connected with the other end of reactor respectively; One end of three isolating switchs is connected with corresponding three reactors respectively, and the other end of three isolating switchs is connected with corresponding disconnector respectively; One end of three disconnectores is connected with corresponding three isolating switchs respectively, and the other end of three disconnectores is connected with three of electrical network respectively.
In the senile experiment system, also comprise: two cover current sensing meanss, for detecting respectively the output end current of two silent oscillation dynamic reactive-load adjusting devices, and send into master control system separately; A set of voltage check device, for detection of the voltage of two silent oscillation dynamic reactive-load adjusting devices site, and send into master control system separately;
Two cover master control systems: in sending the driving instruction separately of two silent oscillation dynamic reactive-load adjusting devices, according to detecting the grid-connected point voltage of returning, use PHASE-LOCKED LOOP PLL TECHNIQUE therefrom to extract voltage phase angle and amplitude, and the silent oscillation dynamic reactive-load adjusting device is detected to the three-phase output current signal of returning after Clark conversion and Park convert, be decomposed into active current feedback quantity and reactive current feedback quantity, and respectively with meritorious instruction current Idref, idle instruction current Iqref compares, then generate given instruction through pi regulator, finally by Clark inverse transformation and Park inverse transformation, obtain SPWM and modulate required three-phase voltage instruction, and the power cell of process drive systems silent oscillation dynamic reactive-load adjusting device.
Two silent oscillation dynamic reactive-load adjusting devices, two silent oscillation dynamic reactive-load adjusting devices are parallel to the same point of 10KV electrical network, every silent oscillation dynamic reactive-load adjusting device comprises following each several part: U phase cascade unit, V phase cascade unit and W phase cascade unit, the three-phase cascade becomes Y-connection between unit, every phase cascade unit is by n H bridge inversion unit, n capacitor group forms, n H bridge inversion unit connected mutually, the head end of first H bridge inversion unit in each cascade unit is connected with corresponding reactor, the end of n H bridge inversion unit in each cascade unit is connected with the end of n H bridge inversion unit in two other cascade unit, DC bus in each H bridge inversion unit is with described large capacitor group phase and connect, H bridge inversion unit is comprised of 4 igbts or integrated gate commutated thyristor, igbt or integrated gate commutated thyristor become bridge-type to connect,
A kind of senile experiment method of silent oscillation dynamic reactive-load adjusting device, the method comprises the steps:
1) complete the wiring of silent oscillation dynamic reactive-load adjusting device rated power senile experiment platform, two silent oscillation dynamic reactive-load adjusting devices are all and in the 10KV switch cubicle.And corresponding voltage, current sampling signal are sent in master control system separately;
2) operation First silent oscillation dynamic reactive-load adjusting device, make this silent oscillation dynamic reactive-load adjusting device send the capacitive reactive power electric current; Observe the current value of 10KV switch cubicle, in current value approaches factory, during electrical network rated capacity current value, move second silent oscillation dynamic reactive-load adjusting device, make this silent oscillation dynamic reactive-load adjusting device send perceptual reactive current;
3) again observe the current value of 10KV switch cubicle, when inflow 10KV switch cubicle current value approaches 0, again increase the capacitive reactive power current value that First silent oscillation dynamic reactive-load adjusting device sends; Now, again observe the current value of 10KV switch cubicle, in current value approaches factory, during electrical network rated capacity current value, increase the perceptual reactive current value that second silent oscillation dynamic reactive-load adjusting device sends; Repeat above operation steps, until two silent oscillation dynamic reactive-load adjusting devices are run to rated current;
4) shut down: alternately reduce the current value of two silent oscillation dynamic reactive-load adjusting devices, until two silent oscillation dynamic reactive-load adjusting device current values are reduced to 0, now, two silent oscillation dynamic reactive-load adjusting devices stop exporting and shutting down.
System simulation experiments
The parameters of electrical network and two table apparatus is as shown in the table:
| Mains frequency/Hz | 50 |
| Net capacity/kVA | 600 |
| Grid line voltage effective value/ |
10 |
| Install 1 rated capacity/MVar | 9 |
| Install 1 rated current/A | 500 |
| Install 2 rated capacities/MVar | 9 |
| Install 2 rated current/A | 500 |
Based on the present invention, the experimental result of analogue system is as follows:
Fig. 4 is the grid-connected point voltage that utilizes invention system of the present invention to obtain and flows into power network current wave simulation figure: when two silent oscillation dynamic reactive-load adjusting devices all run to load current value 500A, the current value that flows through the 10kV switch cubicle is about 8A, and this value is the active current value that two silent oscillation dynamic reactive-load adjusting devices absorb from electrical network in order to overcome own loss.
Fig. 5 is grid-connected point voltage and the First silent oscillation dynamic reactive-load adjusting device output current wave analogous diagram of utilizing invention system of the present invention to obtain, from Fig. 5, we can find out, First silent oscillation dynamic reactive-load adjusting device sends the capacitive reactive power current value, and the electric current that now First silent oscillation dynamic reactive-load adjusting device sends is ahead of line voltage 90 degree.
Fig. 6 is grid-connected point voltage and second the silent oscillation dynamic reactive-load adjusting device output current wave analogous diagram of utilizing invention system of the present invention to obtain, from Fig. 6, we can find out, second silent oscillation dynamic reactive-load adjusting device sends perceptual reactive current value, and the electric current that now second silent oscillation dynamic reactive-load adjusting device sends lags behind line voltage 90 degree.
By simulating, verifying, this invention invention can realize the aging testing program of silent oscillation dynamic reactive-load adjusting device rated power factory in, without the increase hardware cost, without downloading separately, debugs convenient and simplely, is easy to popularization of the present invention.
Certainly; the present invention can also have other various embodiments; in the situation that do not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (4)
1. the senile experiment system of a silent oscillation dynamic reactive-load adjusting device, it is characterized in that, comprise two silent oscillation dynamic reactive-load adjusting devices, described silent oscillation dynamic reactive-load adjusting device is connected with the 10kv electrical network, comprise the U phase in the silent oscillation dynamic reactive-load adjusting device, the cascade unit of V phase and W phase, the three-phase cascade forms Y-connection between unit, comprise H bridge inversion unit and capacitor group in described cascade unit, H bridge inversion unit in each cascade unit is connected successively, the head end of each cascade unit is connected with a reactor, the end of each cascade unit is connected, described capacitance group is connected with the DC bus in H bridge inversion unit.
2. the senile experiment system of silent oscillation dynamic reactive-load adjusting device according to claim 1, it is characterized in that, described H bridge inversion unit is comprised of four igbts or integrated gate commutated thyristor, igbt or integrated gate commutated thyristor become bridge-type to connect, the head end of first H bridge inversion unit in each cascade unit is connected with described reactor, and the end of last H bridge inversion unit of each cascade unit is connected with the end of last H bridge inversion unit in other cascade unit.
3. the senile experiment system of silent oscillation dynamic reactive-load adjusting device according to claim 1 and 2, it is characterized in that, also comprise charge circuit, low-tension supply, step-up transformer, isolating switch and disconnector in the senile experiment system, one end of described reactor is connected with corresponding cascade unit respectively, and the other end of reactor is connected with three isolating switchs respectively; One end of charge circuit is connected with the three-phase of low-tension supply respectively, and the other end of charge circuit is connected with the Secondary Winding of step-up transformer respectively; The Secondary Winding of step-up transformer is connected with the three-phase of charge circuit, and a winding of step-up transformer is connected with the other end of reactor respectively; One end of three isolating switchs is connected with corresponding three reactors respectively, and the other end of three isolating switchs is connected with corresponding disconnector respectively; One end of three disconnectores is connected with corresponding three isolating switchs respectively, and the other end of three disconnectores is connected with three of electrical network respectively.
4. the senile experiment method of a silent oscillation dynamic reactive-load adjusting device, is characterized in that, the method comprises the steps:
1) complete the wiring of silent oscillation dynamic reactive-load adjusting device rated power senile experiment platform, two silent oscillation dynamic reactive-load adjusting devices are all and in the 10KV switch cubicle.And corresponding voltage, current sampling signal are sent in master control system separately;
2) operation First silent oscillation dynamic reactive-load adjusting device, make this silent oscillation dynamic reactive-load adjusting device send the capacitive reactive power electric current; Observe the current value of 10KV switch cubicle, in current value approaches factory, during electrical network rated capacity current value, move second silent oscillation dynamic reactive-load adjusting device, make this silent oscillation dynamic reactive-load adjusting device send perceptual reactive current;
3) again observe the current value of 10KV switch cubicle, when inflow 10KV switch cubicle current value approaches 0, again increase the capacitive reactive power current value that First silent oscillation dynamic reactive-load adjusting device sends; Now, again observe the current value of 10KV switch cubicle, in current value approaches factory, during electrical network rated capacity current value, increase the perceptual reactive current value that second silent oscillation dynamic reactive-load adjusting device sends; Repeat above operation steps, until two silent oscillation dynamic reactive-load adjusting devices are run to rated current;
4) shut down: alternately reduce the current value of two silent oscillation dynamic reactive-load adjusting devices, until two silent oscillation dynamic reactive-load adjusting device current values are reduced to 0, now, two silent oscillation dynamic reactive-load adjusting devices stop exporting and shutting down.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390072A (en) * | 2017-08-25 | 2017-11-24 | 上海蓝瑞电气有限公司 | SVG ageing testing methods and its device |
| CN110208606A (en) * | 2019-06-03 | 2019-09-06 | 河北旭辉电气股份有限公司 | A kind of on-line monitoring method of SVG device DC support capacitance fade situation |
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| US20030062884A1 (en) * | 2001-06-28 | 2003-04-03 | Tamihei Hiramatsu | Regenerative load apparatus and load test method |
| CN101710704A (en) * | 2009-12-17 | 2010-05-19 | 清华大学 | Electric energy adjustment device for active and reactive power adjustment of high-voltage system |
| CN102496950A (en) * | 2011-11-11 | 2012-06-13 | 国电南京自动化股份有限公司 | Power unit grid-connected and feedback device for high-voltage concatenated frequency converter |
| CN203396861U (en) * | 2013-07-03 | 2014-01-15 | 东方日立(成都)电控设备有限公司 | Aging experiment system of static-type dynamic reactive adjusting device |
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2013
- 2013-07-03 CN CN201310277369.2A patent/CN103487675A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20030062884A1 (en) * | 2001-06-28 | 2003-04-03 | Tamihei Hiramatsu | Regenerative load apparatus and load test method |
| CN101710704A (en) * | 2009-12-17 | 2010-05-19 | 清华大学 | Electric energy adjustment device for active and reactive power adjustment of high-voltage system |
| CN102496950A (en) * | 2011-11-11 | 2012-06-13 | 国电南京自动化股份有限公司 | Power unit grid-connected and feedback device for high-voltage concatenated frequency converter |
| CN203396861U (en) * | 2013-07-03 | 2014-01-15 | 东方日立(成都)电控设备有限公司 | Aging experiment system of static-type dynamic reactive adjusting device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390072A (en) * | 2017-08-25 | 2017-11-24 | 上海蓝瑞电气有限公司 | SVG ageing testing methods and its device |
| CN107390072B (en) * | 2017-08-25 | 2019-12-24 | 上海蓝瑞电气有限公司 | SVG aging test method and device |
| CN110208606A (en) * | 2019-06-03 | 2019-09-06 | 河北旭辉电气股份有限公司 | A kind of on-line monitoring method of SVG device DC support capacitance fade situation |
| CN110208606B (en) * | 2019-06-03 | 2021-03-19 | 河北旭辉电气股份有限公司 | Online monitoring method for attenuation condition of direct-current support capacitor of SVG device |
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