CN107390072B - SVG aging test method and device - Google Patents
SVG aging test method and device Download PDFInfo
- Publication number
- CN107390072B CN107390072B CN201710744576.2A CN201710744576A CN107390072B CN 107390072 B CN107390072 B CN 107390072B CN 201710744576 A CN201710744576 A CN 201710744576A CN 107390072 B CN107390072 B CN 107390072B
- Authority
- CN
- China
- Prior art keywords
- svg
- aging test
- current
- svg1
- static var
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
The invention discloses an SVG aging test method and a device thereof, wherein output currents of two SVGs are cross-fed back as instruction currents of the other party, so that reactive power output by the SVGs is automatically alternately and multistage improved and mutually offset in real time, aging tests can be simultaneously carried out on a plurality of groups of SVGs, and the aging test efficiency is improved; when the SVG is normally aged or fails in the aging process, the total reactive power output by the SVG can always approach zero automatically in real time, so that the influence of an aging test on the quality of a power grid is reduced; when the aging test platform is put into or withdrawn from the SVG, the aging test of other SVGs is still normally carried out under the condition that the whole aging test platform is not adjusted, and the operation is convenient.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a SVG aging test method and a device thereof.
Background
In the electric power supply system, the reactive power compensation device can be used for improving the power factor of a power grid, so that the loss of a power supply transformer and a transmission line is reduced, the power supply environment is improved, and the electric energy quality of the power grid is improved; the SVG (static var generator) can compensate reactive power and filter harmonic waves to inhibit three-phase imbalance, so that the SVG is a reactive power compensation device which is widely applied at present. In order to ensure that the SVG device can stably and reliably run and can carry out aging test before leaving a factory, the key for constructing an aging test platform is to avoid the problem that the power factor of a power grid is reduced because a large amount of reactive power is output in the aging test process. With the great use of the product SVG, the improvement of the aging test efficiency is also more important.
At present, two SVG aging test methods exist, one is an aging mode of traditional SVG with a power frequency reactor load and sending partial inductive reactive power to a power grid. The other method is the method in patent CN103487675A aging experiment system of static dynamic reactive power adjusting device: the two SVGs are combined in the switch cabinet, one SVG sends out capacitive reactive current, the current value of the switch cabinet is observed, when the current value reaches the rated capacity current value in a factory, the other SVG is controlled to send out inductive reactive power, the current value of the switch cabinet is observed, and when the current value approaches 0, the capacitive reactive current sent out by the first SVG is continuously increased; and repeating the steps until the two SVGs run to the rated current.
The aging mode of SVG with power frequency reactor load and transmitting part of inductive reactive power to the power grid can not meet the aging test of SVG with higher power grade under the limit of the rated capacity and reactive load of the power grid in a factory. Although the method of patent CN103487675A "aging experiment system for static dynamic reactive power adjusting device" can solve the problem of SVG rated power aging under the condition that the power grid capacity and reactive load current in a factory are limited, the process of adjusting the magnitude of reactive current emitted by two SVGs according to the current value of the switch cabinet needs to be completed by a third party such as manual adjustment or software module adjustment; and in the aging test of the SVGs, the output currents of the two SVGs are regulated according to the current of the switch cabinet instead of the output current of the other SVG, so that one SVG fails, the other SVG still continues to send out reactive power, reactive power larger than the rated capacity in a factory is generated, and the power factor of a power grid is influenced.
Disclosure of Invention
The invention aims to solve the problems and provides an SVG aging test method and an SVG aging test device.
In order to solve the technical problem, the invention provides an SVG aging test device which comprises N detection units, wherein each detection unit is provided with two stations, a circuit breaker is arranged on a circuit of each station connected with a switch cabinet, a current transformer CT used for detecting SVG output current is arranged on each station, and an indicator lamp used for indicating the completion of an aging test is arranged on each station.
The invention also provides an SVG aging test method, wherein a current transformer CT detects the output current of the SVG on two stations, cross feeds back the output current of the two SVGs, and uses the output current as the instruction current of the other party after negative gain (less than-1 and close to-1) so as to realize the automatic multi-stage alternate improvement of the output current of the two SVGs until the SVG runs to the rated current; when the accumulated time of rated current of which the output current of the SVG is more than 90% reaches the specified time of the aging test, the circuit breaker on the aging test circuit of the corresponding station is automatically disconnected, and meanwhile, the indicator lamp on the corresponding station is lightened to mark that the SVG on the station finishes the aging test.
Compared with the prior art, the output currents of the two SVGs are cross-fed back to be used as the instruction current of the other SVG, so that the reactive power output by the SVGs is automatically alternately and multistage improved and mutually offset in real time, the aging test of a plurality of groups of SVGs is simultaneously carried out, and the aging test efficiency is improved; when the SVG is normally aged or fails in the aging process, the total reactive power output by the SVG can always approach zero automatically in real time, so that the influence of an aging test on the quality of a power grid is reduced; when the aging test platform is put into or withdrawn from the SVG, the aging test of other SVGs is still normally carried out under the condition that the whole aging test platform is not adjusted, and the operation is convenient.
Drawings
FIG. 1 is a schematic diagram of an SVG burn-in test platform;
FIG. 2 is a flowchart illustrating the operation of the burn-in platform.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
A SVG aging test method, it adopts the output current of two SVGs of cross feedback to control SVG to output reactive automatic multilevel to improve, new apparatus of mutual compensation, incorporate two static var generators into electric wire netting as a group first; setting a feedback gain smaller than-1 and close to-1 to cross control the instruction current of the two SVGs; and then under the condition of normally starting the SVG, limiting the upper limit of the instruction current amplitude of the SVG to the current when the rated reactive power capacity is output, finally accumulating the time when the output current of the SVG is more than 90% of the rated current, and if the output current of the SVG is more than the specified time of the aging test, marking the aging completion.
The SVG burn-in test method is described below with reference to fig. 1, and includes the following steps:
s1: placing two static var generators SVG1 and SVG2 as a group in a station 1 and a station 2 respectively, closing circuit breakers CB1 and CB 2;
s2: the absolute value lower limit amplitude limit of the SVG instruction current is set to be 5% of the rated current of the SVG instruction current so as to start the SVG;
s3: current transformer CT detects output current I of SVG1 and SVG21、I2And after the feedback gain k, the command currents are respectively crossed to be used as command currents of SVG2 and SVG1, namely: i is1f＝kI2，I2f＝kI1。
S4: setting the value of the feedback gain k to be a value which is smaller than-1 and close to-1, so that the reactive output power of the two static var generators is automatically and gradually increased under the condition of small fluctuation until the SVG runs to a rated reactive power value;
s5: limiting the absolute value upper limit of the instruction currents of the two SVGs to be the current when the rated reactive power capacity is output;
s6: and accumulating the time that the output current of the SVG is more than 90% of the rated current, automatically disconnecting the circuit breaker on the aging test circuit of the corresponding station after the time reaches the specified time of the aging test, and simultaneously lightening the indicator lamp on the corresponding station to mark the completion of the aging test.
According to the above contents, it is easy to find that the reactive power generated by the SVGs during the aging test is counteracted in real time, so that the SVGs can achieve the effect of outputting the total reactive power to automatically approach zero in real time under the condition that the SVGs are normally aged or any one of the SVGs in a group fails in the aging process, and the influence of the aging test on the quality of a power grid is reduced; the aging platform can meet the requirement that multiple groups of SVGs perform aging tests simultaneously, so that the aging test efficiency is improved; the setting of the aging test completion flag can conveniently judge whether the aging test is completed; when the aging test platform is put into or withdrawn from the SVG, the aging test of other SVGs is still normally carried out under the condition that the whole aging test platform is not adjusted, the operation is convenient, and the realization is simple.
Referring to fig. 2, the SVG aging test device includes N detection units, a first detection unit P1 and an nth detection unit Pn are shown in the figure, each detection unit has two stations, each station is connected to a circuit of a switch cabinet and is provided with a circuit breaker, each station is provided with a current transformer CT for detecting an SVG output current, and each station is provided with an indicator light for indicating the completion of an aging test.
The aging test device detects the output current of the SVG on two stations through the current transformer, alternately feeds back the output current of the two SVG, and uses the output current as the instruction current of the other side after negative gain, so that the output current of the two SVG is automatically and alternately increased to the rated current in multiple stages, the time that the output current of the SVG is more than 90% of the rated current is accumulated, and after the specified time of the aging test is reached, the aging test is marked to be completed. The two SVGs are in one group, the output current of the two SVGs is fed back in a cross mode, the output current is automatically and alternately increased in multiple stages, and multiple groups of SVGs can be aged at the same time; when any one SVG in one group fails in the aging process, the reactive power sent by the other SVG can be automatically reduced to 0; one or more groups of SVG can be put in or cut out at any time by the aging test platform; the aging test efficiency is improved while the power factor of the power grid is not influenced.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (1)
1. A Static Var Generator (SVG) aging test method is characterized by comprising the following steps:
s1: placing two static var generators SVG1 and SVG2 as a group in a station 1 and a station 2 respectively, closing a circuit breaker CB1 and a circuit breaker CB 2;
s2: limiting the lower limit of the absolute value of the command current of the two static var generators SVG1 and SVG2 to be 5% of the rated current of the two static var generators SVG1 and SVG2 to start the two static var generators SVG1 and SVG 2;
s3: the current transformer CT detects the output current I of two static var generators SVG1 and SVG21、I2And after the feedback gain k, the command currents are respectively crossed to be used as command currents of two static var generators SVG2 and SVG1, namely: i is1f＝kI2，I2f＝kI1Wherein, I1fFor the command current, I, of the SVG12fCommand current for the static var generator SVG 2;
s4: setting the value of the feedback gain k to be a value which is smaller than-1 and close to-1, so that the reactive output power of the two static var generators SVG1 and SVG2 is automatically and gradually increased under the condition of small fluctuation until the two static var generators SVG1 and SVG2 run to the rated reactive power value;
s5: limiting the absolute value upper limit of the instruction current of the two static var generators SVG1 and SVG2 to be the current when the rated reactive power capacity is output;
s6: and accumulating the time that the output current of the two static var generators SVG1 and SVG2 is greater than 90% of rated current, automatically disconnecting the circuit breakers CB1 and CB2 on the aging test circuit of the corresponding station after the time reaches the specified aging test time, and simultaneously lightening the indicator lamps on the corresponding station to mark the completion of the aging test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710744576.2A CN107390072B (en) | 2017-08-25 | 2017-08-25 | SVG aging test method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710744576.2A CN107390072B (en) | 2017-08-25 | 2017-08-25 | SVG aging test method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107390072A CN107390072A (en) | 2017-11-24 |
| CN107390072B true CN107390072B (en) | 2019-12-24 |
Family
ID=60346726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710744576.2A Active CN107390072B (en) | 2017-08-25 | 2017-08-25 | SVG aging test method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107390072B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389270A (en) * | 2019-05-14 | 2019-10-29 | 深圳市禾望电气股份有限公司 | A kind of grid adaptability test method of reacance generator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101262850B1 (en) * | 2008-12-05 | 2013-05-22 | 한국전자통신연구원 | SVG image output apparatus using caching techniques and method thereof |
| CN103487675A (en) * | 2013-07-03 | 2014-01-01 | 东方日立(成都)电控设备有限公司 | Ageing experiment system and method for static dynamic reactive power adjusting devices |
| CN203720284U (en) * | 2014-01-17 | 2014-07-16 | 海南金盘电气有限公司 | Testing system of static var generator |
| CN104538975A (en) * | 2014-12-26 | 2015-04-22 | 西安爱科赛博电气股份有限公司 | Reactive compensation method and device having transformer reactive current real-time compensation function |
| CN206258525U (en) * | 2016-11-28 | 2017-06-16 | 上海希形科技有限公司 | SVG aging circuits |
-
2017
- 2017-08-25 CN CN201710744576.2A patent/CN107390072B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101262850B1 (en) * | 2008-12-05 | 2013-05-22 | 한국전자통신연구원 | SVG image output apparatus using caching techniques and method thereof |
| CN103487675A (en) * | 2013-07-03 | 2014-01-01 | 东方日立(成都)电控设备有限公司 | Ageing experiment system and method for static dynamic reactive power adjusting devices |
| CN203720284U (en) * | 2014-01-17 | 2014-07-16 | 海南金盘电气有限公司 | Testing system of static var generator |
| CN104538975A (en) * | 2014-12-26 | 2015-04-22 | 西安爱科赛博电气股份有限公司 | Reactive compensation method and device having transformer reactive current real-time compensation function |
| CN206258525U (en) * | 2016-11-28 | 2017-06-16 | 上海希形科技有限公司 | SVG aging circuits |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107390072A (en) | 2017-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103064023B (en) | For grid-connected proving installation and the method for testing thereof of wind-powered electricity generation and photovoltaic | |
| CN102121957B (en) | Performance testing system of large-capacity reactive power dynamic compensating device | |
| CN103472393B (en) | A kind of high-voltage ride through of wind power generating set test macro | |
| CN203037769U (en) | Wind power and photovoltaic grid-connected testing platform | |
| CN102244466B (en) | Voltage sag generator | |
| CN107979080B (en) | Method and device for determining rated voltage of lightning arrester along half-wavelength power transmission line | |
| CN102680861A (en) | System and method for testing short circuit withstanding capability of transformer or electric reactor | |
| CN111610419A (en) | Method for carrying out long-distance submarine cable voltage withstand test by utilizing reactive compensation reactor | |
| CN107390072B (en) | SVG aging test method and device | |
| CN105182103A (en) | Converter transformer symmetrical voltage boosting no-load test circuit | |
| CN104868485A (en) | New energy power station dynamic reactive power compensation equipment application method and device | |
| CN104505841B (en) | The Static Synchronous generator reactive support and control method of power grid asymmetry short circuit fault | |
| CN108828360A (en) | A kind of factory full load test method of large capacity SVG | |
| CN102868169A (en) | Three-phase static reactive compensator based on IGBT | |
| Parseh et al. | Solid state transformer (SST) interfaced doubly fed induction generator (DFIG) wind turbine | |
| CN104810839A (en) | Reactive power compensation method for transformer | |
| CN205301461U (en) | High -power high -voltage inverter aging testing system | |
| CN103490408A (en) | Collaborative modulation method based on power grid multi-circuit direct current | |
| CN208013316U (en) | frequency converter test platform | |
| CN203259611U (en) | New energy integrated grid-connection test device | |
| KR101384727B1 (en) | A Multifunction device for simulated driving of grid connected system and control method for it | |
| CN205301463U (en) | Photovoltaic inverter high voltage passes through test system based on chain SVG | |
| CN201945650U (en) | Performance test system for high-capacity reactive power dynamic compensating device | |
| CN204649913U (en) | Pipe testing circuit between a kind of chain type STATCOM change of current end of the chain | |
| CN205301544U (en) | Photovoltaic inverter voltage rises test system suddenly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |