CN105606934B - UPFC series transformer charge initiation adjustment method - Google Patents
UPFC series transformer charge initiation adjustment method Download PDFInfo
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- CN105606934B CN105606934B CN201610025669.5A CN201610025669A CN105606934B CN 105606934 B CN105606934 B CN 105606934B CN 201610025669 A CN201610025669 A CN 201610025669A CN 105606934 B CN105606934 B CN 105606934B
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- 238000012360 testing method Methods 0.000 claims abstract description 36
- 238000002955 isolation Methods 0.000 claims abstract description 25
- 230000001052 transient effect Effects 0.000 claims abstract description 14
- 230000001681 protective effect Effects 0.000 claims abstract description 10
- 229910001037 White iron Inorganic materials 0.000 claims abstract description 3
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- 238000000819 phase cycle Methods 0.000 claims description 10
- 238000007363 ring formation reaction Methods 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 5
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- 238000007689 inspection Methods 0.000 description 7
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- 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
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Abstract
The invention discloses UPFC series transformer charge initiation adjustment methods, including the following steps: (1) isolation charging in series transformer high-pressure side is carried out using shunt transformer as power supply, for determining electromagnetic transient, the TBS operating status of series transformer charging；The mode that series transformer high-pressure side is charged with the charging of line bus side voltage transformer pt, series transformer high-pressure side with route outgoing line side voltage transformer pt is carried out, voltage nuclear phase and series transformer wiring check are completed；(2) high-pressure side charging is carried out to series transformer using line switching, and carries out series transformer using route Alloy White Iron and protects load test；(3) charging of series transformer low-pressure side and the interim relaying configuration of high-pressure side charging are carried out.The present invention can complete series transformer, the charging of thyristor bypass switch TBS and relevant device and series transformer nuclear phase and protective calibration.
Description
Technical field
The present invention relates to a kind of UPFC series transformer charge initiation adjustment methods, belong to power system automation technology neck
Domain.
Background technique
THE UPFC (Unified Power Flow Controller, UPFC) is by side inverter in parallel and string
Join side inverter composition, active and reactive adjusting is enough realized in side in parallel, and active adjust is mainly stable DC capacitance voltage, from electricity
Net absorbs active power to compensate the active of series side needs and the active consumption of itself, and Reactive-power control is then to inject nothing to system
Function power is with stable access point voltage.Series side is by controlling its injecting voltage vector of connecting come adjusting circuit trend.
UPFC system mainly includes inverter, direct current connecting line and series transformer and shunt transformer composition, parallel connection
Side inverter accesses power grid by shunt transformer parallel connection, and series connection inverter accesses transmission line of electricity by series transformer, is
Structure of uniting and capital equipment are as shown in Figure 1.
UPFC system shunt transformer is conventional two windings or three-winding transformer, and connection type uses star-like or angle-style,
Its access system and operation characteristic are identical as conventional transformer.UPFC series transformer has very very much not compared with conventional transformer
Together, high-pressure side winding uses the type III mode of connection, and winding first and last end is gone here and there in line attachment, and low-pressure side uses star-like or angle-style
Connection is connected with converter valve.
In the UPFC engineering system Start-up and Adjustment stage, need to complete the charging of UPFC correlation main equipment and Control protection system function
The electrification of energy is examined, and wherein the charge initiation of series transformer and its relevant device is one of key link, is subsequent UPFC system
The basis that item of uniting is tested.Series transformer starting test specifically includes that series transformer, thyristor bypass switch TBS and correlation
The charging of equipment and series transformer nuclear phase and protective calibration etc..Main equipment charging is main to be completed to apparatus insulated examination, inspection
Look into the electromagnetic transients such as excitation surge current, the switching overvoltage of no-load transformer switching process, check transformer noise, oil temperature and
During which oil chromatography etc. after impact completes one secondary circuit phase sequence inspection of transformer by voltage nuclear phase, negative by CT loop band
Lotus completes tranformer protection verification, and after the above off-test and result qualification, series transformer has service condition.
Due to UPFC Cascade System transformer connection mode and the particularity of access system mode, make traditional for transformation
The charge initiation adjustment method of device (parallel connection access power grid) is no longer applicable in, and be mainly reflected in: 1) series transformer low-pressure side is direct
It is attached to converter valve, switching directly can not be carried out to series transformer from low-pressure side；2) series transformer high-pressure side winding is direct
In concatenation such as route, and by-pass switch is configured in high-pressure side and low-pressure side, according to its access way and service requirement, series-transformer
Device cannot seal in system in the case where high and low pressure side is opened a way, and cannot achieve the switching from high-pressure side to series transformer.Always
It, UPFC series side converter valve is accessed in power grid by series transformer, due to the special wiring side of UPFC Cascade System transformation
Formula and access system mode are applicable in traditional charge initiation adjustment method for transformer (parallel connection access power grid) no longer,
The charging closing and opening test under voltage rating can not be directly carried out to series transformer.Therefore, it debugs, mentions for UPFC engineering system
Out series transformer charge initiation debud mode for guarantee system debug smoothly, effectively carry out have important meaning.
Summary of the invention
In view of the deficienciess of the prior art, it is an object of the present invention to provide a kind of debugging of UPFC series transformer charge initiation
Method can complete series transformer, the charging of thyristor bypass switch TBS and series transformer nuclear phase and protective calibration.
To achieve the goals above, the present invention is to realize by the following technical solutions:
UPFC series transformer charge initiation adjustment method of the invention, including the following steps:
(1) isolation charging in series transformer high-pressure side is carried out using shunt transformer as power supply, for determining series connection
The electromagnetic transient of transformer charging, TBS operating status；Carry out series transformer high-pressure side band line bus side mutual induction of voltage
The mode that device PT charging, series transformer high-pressure side are charged with route outgoing line side voltage transformer pt, completes voltage nuclear phase and string
Join transformer connection inspection；
(2) high-pressure side charging is carried out to series transformer using line switching, carries out route cyclization and series transformer is protected
Protecting band load check；
(3) charging of series transformer low-pressure side and the interim relaying configuration of high-pressure side charging are carried out.
Step (1) specifically includes following steps: (1A) fills firstly, carrying out series transformer high-pressure side isolation
Electricity: under conditions of series transformer low-pressure side by-pass switch quartile and each side grounding switch quartile, series transformer height is pulled open
Two groups of side isolation switch is pressed, series transformer is carried out under the isolation of high-pressure side by merging connection step down side switch
Charge switching, checks the electromagnetic transient during charging switching, determines series transformer insulation, checks that thyristor bypass is opened
Close TBS operating condition；After the completion of test, shunt transformer low-side switch is pulled open；(2A) is secondly, carry out series transformer high pressure
The charging of lateral fasciole road bus bar side voltage transformer pt: under the conditions of series transformer low-pressure side by-pass switch quartile, series-transformer
Device high-pressure side is closed by line side grounding switch, isolation switch is separated, and series transformer high-pressure side flanks earthing knife-switch by two buss lines
Lock separates, isolation switch closes, and carries out high-pressure side band bus bar side to series transformer by merging connection step down side switch
Route PT charging checks the electromagnetic transient during charging switching, determines that series transformer insulate, and check series-transformer
Device no-load voltage ratio and phase sequence；After the completion of test, shunt transformer low-side switch is pulled open；(3A) is finally, series transformer high-pressure side band
Route outgoing line side PT charging: under the conditions of series transformer low-pressure side by-pass switch quartile, route is leaned in series transformer high-pressure side
Flank that earthing knife-switch separates, isolation switch closes, series transformer high-pressure side closes by two buss lines side grounding switch, isolation switch point
It opens, is charged by merging connection step down side switch to series transformer progress high-pressure side band route outgoing line side PT, inspection is filled
Electromagnetic transient during electric switching determines that series transformer insulate, and checks series transformer phase sequence；Test is completed
Afterwards, shunt transformer low-side switch is pulled open.
The specific method of step (2) is as follows: charge series transformer for the high-pressure side (1B): by series transformer high and low pressure
Under conditions of way switch coincidence and high-pressure side isolation switch coincidence, zygonema way switch charging series transformer checks the electricity of charging
Magnetic transient process checks series transformer high-voltage isulation；Series transformer high pressure side switch is separated, to progress line bus
Side PT and outgoing line side PT carries out further verifying series transformer wiring and phase sequence with power supply nuclear phase；After the completion of test, string is closed
Join high voltage side of transformer by-pass switch；The cyclization of (2B) route and series transformer protect load test: by closing route pair
Side switch carries out route cyclization, and separates series transformer HT by-pass switch, checks series transformer electromagnetic transient, and
Series transformer, which is carried out, using route Alloy White Iron protects load test.
In step (3), the charging of series transformer low-pressure side and the high-pressure side interim relaying configuration method of charging are as follows: (1C) string
Join the interim relaying configuration of step down side charging: when series transformer low-pressure side charges, in shunt transformer low-side switch
Upper to install interim overcurrent protection additional, which takes shunt transformer low-pressure side electric current to carry out fault distinguishing, as low-pressure side charging
Interim protective device, tripping shunt transformer low-side switch when the protection act, cuts off the power；(2C) series transformer high pressure
Charge interim relaying configuration for side: when series transformer high-voltage charging, using route protection as the protection of charged area, series connection becomes
Depressor high-voltage winding belongs within the scope of route protection, the quick acting of route protection energy and tripping line switching when breaking down,
It cuts off the power.
In step (1C), considered when interim overcurrent protective device fixed value adjusting by following condition: series transformer high-pressure side
Charging zone is maximum when band route outlet PT charging, and interim overcurrent protection will guarantee that its protection scope can cover this and fill when adjusting
Line end under electric mode；Interim overcurrent protection need to escape the excitation surge current when charging of series transformer low-pressure side, prevent from encouraging
Magnetic, which shoves, causes charging to fail.
Method of the invention has been applied to the system debug of domestic UPFC engineering, can complete series transformer, thyristor
The charging of by-pass switch TBS and relevant device and series transformer nuclear phase and protective calibration, for guaranteeing that system debug is smooth, having
Effect, which is carried out, and engineering smoothly puts into operation important meaning.
Detailed description of the invention
Fig. 1 is UPFC system structure and capital equipment；
Fig. 2 is UPFC system typical wiring figure；
Fig. 3 is connected to for UPFC string low pressure side through switch yard disconnecting link and low pressure side schematic diagram；
Fig. 4 is series transformer high-pressure side isolation charging schematic diagram；
Fig. 5 is series transformer high-pressure side band line bus side PT charging schematic diagram；
Fig. 6 is series transformer high-pressure side band route outgoing line side PT charging schematic diagram；
Fig. 7 is that series transformer high-pressure side is charged and string becomes system mode before protection load test is tested；
Fig. 8 is series transformer high-pressure side charging schematic diagram；
Fig. 9 is that load test schematic diagram is charged and protected in series transformer high-pressure side.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
It charges respectively from series transformer low pressure side and high pressure side to series transformer, and to the interim guarantor in charging process
Shield is configured.
Firstly, series transformer low-pressure side charges
For actual UPFC engineering, in order to give full play to the control performance of converter valve, in valve side alternating-current switch
Configuration disconnecting link makes it have a flexible operation control method, and a kind of typical configuration mode is: for UPFC engineering, generally
Have the function of static synchronous series compensator (SSSC) operation, it is remaining complete when a converter fault in UPFC system
Good inverter can go here and there in line attachment in a manner of SSSC to run, and route active power is adjusted.Inverter is made
To need to charge to inverter before SSSC operation, corresponding disconnecting link can be set in switch yard, be connected to inverter first simultaneously
Connection transformer charges, and switches to series transformer by disconnecting link again after charging complete, and run by SSSC.In order to have this
Kind function, it is desirable that same inverter is converted by disconnecting link, can be connected to side in parallel, can also be connected to series transformer, typical wiring
As shown in Figure 2.
This mode of connection makes series transformer low-pressure side that can be connected to shunt transformer low-pressure side through switch yard disconnecting link,
Switching is carried out from low-pressure side to series transformer using parallel pressure change low-side switch QF1, this is series-transformer in the present invention
The core concept of device low-pressure side charging.It is worth noting that: (1) since switch yard disconnecting link generally have interlock condition, Bu Nengzhi
It connected switch yard disconnecting link and series transformer low-pressure side is connected to shunt transformer low-pressure side, and needed to release disconnecting link interlocking manually
Condition；(2) for UPFC system, general parallel pressure change low-voltage rated voltage is equal with series transformer low-pressure side voltage rating,
And if shunt transformer has tap, tap is placed in 0 gear；(3) if switching no above-mentioned connection disconnecting link and connecing
Line can make series transformer low-pressure side be connected to shunt transformer low-pressure side by increasing patch；(4) series-transformer is carried out
Device should will disconnect when charging with the link circuit of converter valve.
Before test, series transformer low-pressure side is connected to by low pressure side in parallel by switch yard disconnecting link or patch,
It is illustrated in figure 3 the situation connected by switch yard disconnecting link (DS11 and DS22), converter valve charging resistor when series-transformer charges
It bypasses (DS4 coincidence), and removes the connecting lead wire of converter valve 1 and switch yard.Series transformer low-pressure side charge test step is such as
Under:
1) series transformer high-pressure side isolation charges
Before charging, system condition is as follows:
(1) shunt transformer charges, valve side switch QF3 quartile；
(2) series transformer low-pressure side by-pass switch QF2 quartile；
(3) series transformer high-pressure side isolation switch DS1, DS2 quartile；
(4) series transformer high-pressure side grounding switch ES1, ES2 quartile；
Close shunt transformer valve side switch QF3 charging series transformer, charging zone lines widening area as shown in Figure 4
Complete following check in domain:
(1) electromagnetic transients such as series transformer excitation surge current, switching overvoltage；
(2) series transformer lightning arrestor movement situation；
(3) check that transformer fan starting should meet design requirement；
(4) thyristor bypass switch TBS and valve control operating condition；
(5) related protection is working properly, unprotect movement；
(6) series transformer operating condition, and new equipment electrification examination.
After the completion of test, shunt transformer valve side switch QF3 is pulled open.
2) band bus bar side route PT in series transformer high-pressure side charges
Before charging, system condition is as follows:
(1) UPFC line outage, two sides switch QF5, QF6 cold standby:
(2) shunt transformer charges, valve side switch QF3 quartile；
(3) series transformer high pressure side switch QF1 quartile, low-pressure side by-pass switch QF2 quartile；
(4) route disconnecting link DS2 quartile is leaned in series transformer high-pressure side, leans on route earthing knife-switch ES2 coincidence；
(5) route disconnecting link DS1 coincidence is leaned in series transformer high-pressure side, leans on bus earthing knife-switch ES1 quartile；
Close shunt transformer valve side switch QF3 charging series transformer, charging zone lines widening area as shown in Figure 5
Complete following check in domain:
(1) electromagnetic transients such as series transformer excitation surge current, switching overvoltage；
(2) series transformer lightning arrestor movement situation；
(3) check that series transformer no-load voltage ratio is correct；
(4) thyristor bypass switch TBS and valve control operating condition；
(5) related protection is working properly, unprotect movement；
(6) line bus side PT1 and shunt transformer high-pressure side PT0 nuclear phase check series transformer phase sequence.
After the completion of test, shunt transformer valve side switch QF3 is pulled open.
3) band route outgoing line side PT in series transformer high-pressure side charges
Before charging, system condition is as follows:
(1) UPFC line outage, two sides switch QF5, QF6 cold standby:
(2) shunt transformer charges, valve side switch QF3 quartile；
(3) series transformer high pressure side switch QF1 quartile, low-pressure side by-pass switch QF2 quartile；
(4) route disconnecting link DS1 quartile is leaned in series transformer high-pressure side, leans on route earthing knife-switch ES1 coincidence；
(5) route disconnecting link DS2 coincidence is leaned in series transformer high-pressure side, leans on bus earthing knife-switch ES2 quartile；
Close shunt transformer valve side switch QF3 charging series transformer, charging zone lines widening area as shown in Figure 6
Complete following check in domain:
(1) electromagnetic transients such as series transformer excitation surge current, switching overvoltage；
(2) series transformer lightning arrestor movement situation；
(3) thyristor bypass switch TBS and valve control operating condition；
(4) related protection is working properly, unprotect movement；
(5) line bus side PT2 and shunt transformer high-pressure side PT0 nuclear phase check series transformer phase sequence.
After the completion of test, shunt transformer valve side switch QF3 is pulled open.
Utilize above step 1)~3) achievable to series transformer low-pressure side switching (3 times), insulation inspection, series-transformer
Device nuclear phase and sequence examing, TBS and valve control operating condition inspection etc..It is remaining if switching frequency is greater than 3 times (general switching 5 times)
Closing and opening test can be carried out by the switching for 1) carrying out string change high-pressure side isolation.
Secondly, the charging of series transformer high-pressure side and string become protection load test
Due to the special access system mode of series transformer, high-pressure side configures bypass breaker, passes through isolation switch
It is connected to route, does not configure connection breaker.And series transformer is not allowed when route operates normally according to service requirement
Otherwise access system in the unloaded state may cause series transformer overvoltage and damage equipment.
Before test, UPFC line outage, two sides switch QF5, QF6 stand-by heat, switch yard disconnecting link DS11, DS12, DS21,
DS22 quartile, by converter valve and isolation of system, series transformer high-pressure side connects disconnecting link DS1, DS2 coincidence, high and low pressure side bypass
Switch QF1, QF2 coincidence；As shown in Figure 7.
When test, by line switching QF5 charging series transformer, and route cyclization is carried out with QF6, utilize line power
It carries out series-transformer and protects the correlation circuit CT load test.The charging of series transformer high-pressure side and protection load test step
It is as follows:
1) charge series transformer for high-pressure side
It closes line switching QF5 charging series transformer and route, charging zone lines overstriking as shown in Figure 8 region is complete
It is checked at following:
(1) electromagnetic transients such as series transformer excitation surge current, switching overvoltage；
(2) series transformer lightning arrestor movement situation；
(3) series transformer insulation against ground is examined；
(4) series transformer operating condition, and new equipment electrification examination.
2) series transformer nuclear phase
Series transformer high pressure side switch QF1 is pulled open, carries out line bus side PT1 and outgoing line side PT2 with power supply core
Phase further verifies series transformer wiring and phase sequence；
After the completion of test, series transformer high pressure side switch QF1 is closed.
3) route cyclization and series transformer protect load test
Line switching QF6 is closed, and separates series transformer high pressure side switch QF1, charging zone line as shown in Figure 9
Overstriking region complete following check and test:
(1) series transformer electromagnetic transient and operating condition；
(2) series transformer protects correlation the circuit CT (T1, T2 and T3) load test.
After the completion of test, series transformer high pressure side switch QF1 is closed, route resumes operation；Separate series-transformer
Device high-pressure side connects disconnecting link DS1, DS2 and series transformer is isolated.
According to above step 1)~3) achievable to series transformer high-pressure side switching and insulation inspection, and utilize route conjunction
Load current after ring completes the load test in the series transformer protection circuit CT.
Third, when series transformer charge test interim relaying configuration
According to the above series transformer charging process, interim protection when carrying out the charging of string low pressure side and high-voltage charging is matched
It sets, specific as follows:
1) the interim relaying configuration scheme of series transformer low-pressure side charging
It breaking down in charged area when to guarantee the charging of series transformer low-pressure side, can quickly disconnect source-side switches,
It prevents equipment to be damaged, installs interim overcurrent protection additional on the switch QF3 of shunt transformer valve side or enable its overcurrent that charges and protect
Shield when overcurrent protection (if switch equipped with), as the interim protective device of low-pressure side charging, tripping QF3 when the protection act,
It cuts off the power.
Consider when interim overcurrent protective device fixed value adjusting by following condition:
(1) it is clear to by series transformer low-pressure side charging method, band route outlet in series transformer high-pressure side shown in fig. 6
Charging zone is maximum when PT charges, so to guarantee that its protection scope can cover Fig. 6 and fill when the interim overcurrent protection adjusting of QF1
Line end under electric mode；
(2) interim overcurrent protection should be able to escape excitation surge current when series transformer low-pressure side charges, and prevent excitation surge current
Charging is caused to fail.
2) series transformer high-pressure side charge protection allocation plan
It breaking down in charged area when to guarantee series transformer high-voltage charging, can quickly disconnect source-side switches, prevent
Only equipment is damaged, and to guarantee that route protection operates normally when using line switching charging series transformer.Series transformer
High-voltage winding belongs within the scope of route protection, the quick acting of route protection energy and tripping line switching when breaking down, cutting
Power supply.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (1)
1.UPFC series transformer charge initiation adjustment method, which is characterized in that including the following steps:
(1) isolation charging in series transformer high-pressure side is carried out using shunt transformer as power supply, for determining series-transformer
The electromagnetic transient of device charging, TBS operating status；Carry out series transformer high-pressure side band line bus side voltage transformer pt
The mode that charging, series transformer high-pressure side are charged with route outgoing line side voltage transformer pt, completes voltage nuclear phase and series connection becomes
Depressor wiring check；
(2) high-pressure side charging is carried out to series transformer using line switching, carries out route cyclization and series transformer protection band
Load check；
(3) charging of series transformer low-pressure side and the interim relaying configuration of high-pressure side charging are carried out；
Step (1) specifically includes following steps:
(1A) is firstly, carry out the charging of series transformer high-pressure side isolation: in series transformer low-pressure side by-pass switch quartile
And under conditions of each side grounding switch quartile, two groups of series transformer high-pressure side isolation switch is pulled open, by closing shunt transformer
Low-side switch carries out the charging switching under the isolation of high-pressure side to series transformer, checks the electromagnetism during charging switching
Transient process determines series transformer insulation, checks thyristor bypass switch TBS operating condition；After the completion of test, parallel connection is pulled open
Step down side switch；
(2A) charges secondly, carrying out series transformer high-pressure side band line bus side voltage transformer pt: low in series transformer
Under the conditions of pressing side by-pass switch quartile, series transformer high-pressure side is closed by line side grounding switch, isolation switch is separated, series connection
High voltage side of transformer is separated by two buss lines side grounding switch, isolation switch closes, by merging connection step down side switch
High-pressure side band bus bar side route PT is carried out to series transformer to charge, and checks the electromagnetic transient during charging switching, really
Determine series transformer insulation, and checks series transformer no-load voltage ratio and phase sequence；After the completion of test, pulls open shunt transformer low-pressure side and open
It closes；
(3A) is finally, series transformer high-pressure side band route outgoing line side PT charges: in series transformer low-pressure side by-pass switch point
Under the conditions of position, series transformer high-pressure side is separated by line side earthing, isolation switch closes, and series transformer high-pressure side is by mother
Line line side grounding switch closes, isolation switch is separated, is carried out by merging connection step down side switch to series transformer
High-pressure side band route outgoing line side PT charges, and checks the electromagnetic transient during charging switching, determines that series transformer insulate,
And check series transformer phase sequence；After the completion of test, shunt transformer low-side switch is pulled open；
The specific method of step (2) is as follows:
Charge series transformer for the high-pressure side (1B): in series transformer high and low pressure by-pass switch coincidence and high-pressure side isolation switch
Under conditions of coincidence, zygonema way switch charging series transformer checks the electromagnetic transient of charging, checks that series transformer is high
Pressure insulation；Series transformer high pressure side switch is separated, is carried out to line bus side PT and outgoing line side PT is carried out with power supply core
Phase further verifies series transformer wiring and phase sequence；After the completion of test, series transformer high pressure side switch is closed；
The cyclization of (2B) route and series transformer protect load test: route cyclization is carried out by closing route opposite side switch,
And separate series transformer HT by-pass switch, check series transformer electromagnetic transient, and using route Alloy White Iron into
Row series transformer protects load test；
In step (3), the charging of series transformer low-pressure side and the high-pressure side interim relaying configuration method of charging are as follows:
The interim relaying configuration of (1C) series transformer low-pressure side charging: when series transformer low-pressure side charges, in shunt transformer
Install interim overcurrent protection in low-side switch additional, the interim overcurrent protection takes shunt transformer low-pressure side electric current progress failure to sentence
Not, the interim protective device as low-pressure side charging, tripping shunt transformer low-pressure side is opened when the interim protective device acts
It closes, cuts off the power；
Charge interim relaying configuration for (2C) series transformer high-pressure side: when series transformer high-voltage charging, being made using route protection
For the protection of charged area, series transformer high-voltage winding belongs within the scope of route protection, route protection energy when breaking down
Quick acting and tripping line switching, cut off the power.
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| CN201610025669.5A CN105606934B (en) | 2016-01-14 | 2016-01-14 | UPFC series transformer charge initiation adjustment method |
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| CN201610025669.5A CN105606934B (en) | 2016-01-14 | 2016-01-14 | UPFC series transformer charge initiation adjustment method |
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|---|---|---|---|---|
| CN106207996B (en) * | 2016-08-24 | 2018-06-19 | 国网江苏省电力公司电力科学研究院 | THE UPFC series transformer charge initiation tests relaying configuration method |
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