CN105785188A - High-capacity phase modifier test method with small power grid influence - Google Patents
High-capacity phase modifier test method with small power grid influence Download PDFInfo
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- CN105785188A CN105785188A CN201610222684.9A CN201610222684A CN105785188A CN 105785188 A CN105785188 A CN 105785188A CN 201610222684 A CN201610222684 A CN 201610222684A CN 105785188 A CN105785188 A CN 105785188A
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- modifier
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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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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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Relating To Insulation (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The present invention discloses a high-capacity phase modifier test method with small power grid influence. The phase modulation test of a phase modifier is performed in the condition that two phase modifiers with the same bus are running at the same time, one of the phase modifiers performs a leading phase operation test while the other one thereof performs a phase lag test, and the phase modifier of the leading phase operation test provides a power grid environment with low power grid voltage for the phase modifier of the phase lag test, and at the same time, the phase modifier of the phase lag test provides a power grid environment with high power grid voltage for the phase modifier of the leading phase operation test, so that the problem is avoided that the voltage at the terminal of the phase modifier reaches the lower limit caused by not high enough power grid voltage in the leasing phase operation test or the problem is avoided that the voltage at the terminal of the phase modifier reaches the upper limit caused by not low enough power grid voltage in the phase lag operation test. The high-capacity phase modifier test method with small power grid influence is able to allow a phase modifier to obtain proper phase modulation performance through a test and reduce the influence on power grid voltage to a certain extent at a test, and a good application prospect.
Description
Technical field
The present invention relates to a kind of Large Copacity phase modifier test method that electric network influencing is less, belong to net coordination technique field, source.
Background technology
A large amount of inputs along with extra-high voltage direct-current long distance transmission line, idle deficiency, low voltage problem is easily produced during circuit heavy duty, then idle surplus during underloading, voltage is higher, therefore the receiving end electrical network of the intensive drop point of extra-high voltage direct-current, Voltage-stabilizing Problems highlights day by day, becomes the new stable form of restriction operation of power networks.Phase modulation function, when network load weight, allows it cross and encourages operation, increase reactive current component delayed in power transmission line, thus line drop can be reduced；When power transmission line underloading, allow its underexcited operation, absorb delayed reactive current, can prevent line voltage from rising, thus maintaining the voltage of electrical network in certain level, visible phase modifier can solve various types of Voltage-stabilizing Problems such as receiving end electrical network dynamic reactive sending end not enough, weak grid short circuit capacity underbraced, can provide important support for following operation of power networks.Current Guo Wang company accelerates to advance the engineer applied of phase modifier, solves the dynamic reactive deficiency problem that UHV transmission causes.
But, along with the phase modifier of early stage has been gradually backed out operation of power networks, the operation of phase modifier and the experience of phase modulation ability test is fewer and feweri, and new phase modifier electric pressure and capacity cannot be mentioned in the same breath with the phase modifier run before, it is necessary to conduct a research for the current phase modifier method of operation and phase modulation test method etc..Wherein phase modulation ability test determines that the important evidence of phase modifier phase modulation ability, irrational test method are likely to reduce the phase modulation ability of phase modifier own, can cause equipment damage time serious.It addition, the phase modifier capacity currently put into operation is relatively big, it is 300Mvar, carries out phase modulation ability test when normal electrical network operation, the fluctuation of line voltage will be caused, affect the stable of electrical network.
Summary of the invention
It is an object of the invention to overcome deficiency of the prior art, a kind of Large Copacity phase modifier test method that electric network influencing is less is provided, the due phase modulation performance of unit can be given full play to, the impact on line voltage can be reduced again, thus practical solves the technical problem that dynamic reactive is not enough.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is: a kind of Large Copacity phase modifier test method that electric network influencing is less, comprises the steps:
Step one: under the experimental condition that two phase modifiers run simultaneously on same bus: wherein phase modifier is carried out stagnant phase study, another phase modifier is carried out leading phase test simultaneously,
Step 2: alternately change the reactive power of two phase modifiers: when the electric parameter of a wherein phase modifier or temperature parameter reach parameter limit value, make this phase modifier stable operation under current working；Meanwhile, the operating condition of record now another phase modifier, it is designated as operating mode one；
Step 3: continue another phase modifier is tested, until its electric parameter or temperature parameter also reach parameter limit value so that it is stable operation reaches under limit operating mode in parameter；
Step 4: the phase modifier for reaching limit after parameter in step 3 carries out excitation reverse operating, for the moment, two phase modifiers start alternately inverted operation to recover to step 2 the operating mode of record；
Step 5: when two phase modifier reactive powers are all recovered to original state, stagnant phase study phase modifier proceeds by leading phase test, leading phase test phase modifier proceeds by stagnant phase study, repeats step 2 ~ step 3, thus obtaining the phase modulation ability of two phase modifiers.
Described electric parameter includes: excitation voltage, exciting current, set end voltage, machine end electric current, system voltage and power-factor angle.
Described temperature parameter includes iron core temperature and the coil temperature of phase modifier.
Compared with prior art, the present invention reachesBeneficial effectIt is: propose to carry out when two phase modifiers of same bus run simultaneously when phase modulation test carried out by phase modifier, time stagnant phase study carried out by one phase modifier, another carries out Under-excitation Operation Test, such leading phase test phase modifier provides line voltage power grid environment on the low side for stagnant phase study phase modifier, carry out the power grid environment that the phase modifier of stagnant phase study provides line voltage higher for leading phase test phase modifier equally, when when avoiding leading phase test, because line voltage is not high enough, phase modifier set end voltage reaches lower limit or stagnant phase study, because line voltage is low not, set end voltage reaches the upper limit, the present invention enables to phase modulation function and obtains due phase modulation performance by testing, reduce the impact on line voltage to a certain extent during test simultaneously, have a good application prospect.
Accompanying drawing explanation
Fig. 1 is the flow chart of the present invention.
Armature-reaction vectogram during Fig. 2 phase modifier lagging phase operation.
Armature-reaction vectogram during Fig. 3 phase modifier leading phase operation.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.Following example are only for clearly illustrating technical scheme, and can not limit the scope of the invention with this.
The Large Copacity phase modifier phase modulation test method a kind of that electric network influencing is less of the present invention, propose to carry out when two phase modifiers of same bus run simultaneously when phase modulation test carried out by phase modifier, when stagnant phase study carried out by one phase modifier, another carries out Under-excitation Operation Test, such leading phase test phase modifier provides line voltage power grid environment on the low side for stagnant phase study phase modifier, carry out the power grid environment that the phase modifier of stagnant phase study provides line voltage higher for leading phase test phase modifier equally, when when avoiding leading phase test, because line voltage is not high enough, phase modifier set end voltage reaches lower limit or stagnant phase study, because line voltage is low not, set end voltage reaches the upper limit, phase modulation function is made to obtain due phase modulation performance by testing, reduce the impact on line voltage to a certain extent during test simultaneously.
Specifically include following steps:
Step (1): to Large Copacity phase modifier, first should determine that whether same bus has another phase modifier, and this method is only applicable to the phase modifier that same bus has two phase modifiers to run；
Step (2): before test, two phase modifiers of reply all complete test connection, measuring power angle need to connect key signal and set end voltage, and complete merit angle zero measurement at unit Light Condition, when unit operation, actual measurement phase modifier runs merit angle, the associated temperature parameters such as electric parameter and phase modifier iron core temperature, coil temperature such as other set end voltages, machine end electric current, excitation voltage, exciting current, system voltage can read from monitored picture, but to guarantee that all recording parameterses are correct；
Step (3): stagnant phase study carried out by certain phase modifier, is simultaneous for another phase modifier and carries out leading phase test；In process of the test, phase modifier often changes the idle of certain capacity, just record one secondary data, and two phase modifier operations hocket；Assume that stagnant phase study carried out by A phase modifier, leading phase test carried out by B phase modifier, original state A, B phase modifier is idle when being 0 two phase modifier operational factors of record, A phase modifier is idle, and rising 20%Sn(can also be 10%Sn or fix a numerical value 50Mvar) idle, record a secondary data, B phase modifier is idle decline 20%Sn, record a secondary data, A phase modulation rises idle 20%Sn again ... hocket with this.
Step (4): during two phase modifier parameters of record, observing the change of two phase modifier electric parameters and temperature parameter, attack parameter must not be higher than parameter upper limit, and drawdown parameter must not lower than parameter lower limit.Armature-reaction vectogram when Fig. 2 is phase modifier lagging phase operation, now phase modifier was in the state of encouraging, excitation voltage, exciting current rise, idle, set end voltage, machine end electric current are in propradation, because electric current increases, temperature rises core portion temperature, and therefore possible during lagging phase operation limiting factor is: excitation voltage, exciting current, idle, set end voltage, temperature unshakable in one's determination etc..Armature-reaction vectogram when Fig. 3 is phase modifier leading phase operation, now phase modifier is in underexcitation state, excitation voltage, exciting current, idle, set end voltage are in decline state, and merit angle is to rise, additionally owing to brow leakage increases during leading phase operation, core end structural member portion temperature rises, and therefore possible during leading phase operation limiting factor is: the lower limit of set end voltage, merit angle, end core temperature etc..When there being phase modifier parameter first to reach the full quota, then this phase modifier completes the phase modulation test of a part, and Simultaneous Stabilization runs in this operating mode, another phase modifier then continues test, until parameter reaches limit, after stable operation a period of time, two units all complete the phase modulation test of half；After in leading phase test, merit angle reaches limit value, leading phase test phase modifier then runs at this stable conditions, and stagnant phase study phase modifier then continues often to increase the idle of 20%Sn, records primary parameter, until it reaches limit.
Step (5): for after reach the phase modifier of limit and first carry out excitation reverse operating, arriving first to reach limits phase modifier to reach in limited time, after reach limit phase modifier operating condition after, two alternately inverted operations of phase modifier, carry out two second half phase modulation of phase modifier tests, repeat step (4), thus obtaining the phase modulation ability of two units.In step (4) in example, stagnant phase study phase modifier should first reduce and idle reaches this phase modifier operating mode in limited time to leading phase test phase modifier parameter, then the two alternately inverted operation of phase modifier, two phase modifiers are idle be all down to 0 after, stagnant phase study phase modifier proceeds by leading phase test, leading phase test phase modifier proceeds by stagnant phase study, repeats step (4) test process.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the technology of the present invention principle; can also making some improvement and deformation, these improve and deformation also should be regarded as protection scope of the present invention.
Claims (3)
1. the Large Copacity phase modifier test method of a kind electric network influencing is less, it is characterised in that comprise the steps:
Step one: under the experimental condition that two phase modifiers run simultaneously on same bus: wherein phase modifier is carried out stagnant phase study, another phase modifier is carried out leading phase test simultaneously,
Step 2: alternately change the reactive power of two phase modifiers: when the electric parameter of a wherein phase modifier or temperature parameter reach parameter limit value, make this phase modifier stable operation under current working；Meanwhile, the operating condition of record now another phase modifier, it is designated as operating mode one；
Step 3: continue another phase modifier is tested, until its electric parameter or temperature parameter also reach parameter limit value so that it is stable operation reaches under limit operating mode in parameter；
Step 4: the phase modifier for reaching limit after parameter in step 3 carries out excitation reverse operating, for the moment, two phase modifiers start alternately inverted operation to recover to step 2 the operating mode of record；
Step 5: when two phase modifier reactive powers are all recovered to original state, stagnant phase study phase modifier proceeds by leading phase test, leading phase test phase modifier proceeds by stagnant phase study, repeats step 2 ~ step 3, thus obtaining the phase modulation ability of two phase modifiers.
2. the Large Copacity phase modifier test method that electric network influencing is less according to claim 1, it is characterised in that: described electric parameter includes: excitation voltage, exciting current, set end voltage, machine end electric current, system voltage and power-factor angle.
3. the Large Copacity phase modifier test method that electric network influencing is less according to claim 1, it is characterised in that: described temperature parameter includes iron core temperature and the coil temperature of phase modifier.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849059A (en) * | 2017-01-16 | 2017-06-13 | 国网江苏省电力公司电力科学研究院 | Generating set under-excitation ability method for digging based on analog simulation |
| CN107085161A (en) * | 2017-04-28 | 2017-08-22 | 国家电网公司 | A kind of live steady-state short-circuit characteristic test method of large-scale phase modifier transformer group |
| CN108092274A (en) * | 2017-12-05 | 2018-05-29 | 国电南瑞科技股份有限公司 | The phase modifier excitation system control method of voltage and reactive power double-closed-loop control |
| CN111490708A (en) * | 2020-04-21 | 2020-08-04 | 新疆大学 | Double-shaft excitation device of synchronous phase modulator and adjusting method |
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| JP2008259298A (en) * | 2007-04-04 | 2008-10-23 | Honda Motor Co Ltd | Motor |
| JP2009159760A (en) * | 2007-12-27 | 2009-07-16 | Honda Motor Co Ltd | Electric motor |
| CN105226710A (en) * | 2015-10-20 | 2016-01-06 | 国家电网公司 | Based on the generating set under-excitation ability dynamical min method of measured data |
| CN105337318A (en) * | 2015-10-20 | 2016-02-17 | 国家电网公司 | Phase modulation operation capability test method and system for wind turbine generators |
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2016
- 2016-04-12 CN CN201610222684.9A patent/CN105785188B/en active Active
Patent Citations (4)
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| JP2008259298A (en) * | 2007-04-04 | 2008-10-23 | Honda Motor Co Ltd | Motor |
| JP2009159760A (en) * | 2007-12-27 | 2009-07-16 | Honda Motor Co Ltd | Electric motor |
| CN105226710A (en) * | 2015-10-20 | 2016-01-06 | 国家电网公司 | Based on the generating set under-excitation ability dynamical min method of measured data |
| CN105337318A (en) * | 2015-10-20 | 2016-02-17 | 国家电网公司 | Phase modulation operation capability test method and system for wind turbine generators |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849059A (en) * | 2017-01-16 | 2017-06-13 | 国网江苏省电力公司电力科学研究院 | Generating set under-excitation ability method for digging based on analog simulation |
| CN107085161A (en) * | 2017-04-28 | 2017-08-22 | 国家电网公司 | A kind of live steady-state short-circuit characteristic test method of large-scale phase modifier transformer group |
| CN107085161B (en) * | 2017-04-28 | 2019-06-07 | 国家电网公司 | A kind of large size phase modifier-transformer group scene steady-state short-circuit characteristic test method |
| CN108092274A (en) * | 2017-12-05 | 2018-05-29 | 国电南瑞科技股份有限公司 | The phase modifier excitation system control method of voltage and reactive power double-closed-loop control |
| CN108092274B (en) * | 2017-12-05 | 2021-07-02 | 国电南瑞科技股份有限公司 | Phase modulator excitation system control method based on voltage and reactive power double closed-loop control |
| CN111490708A (en) * | 2020-04-21 | 2020-08-04 | 新疆大学 | Double-shaft excitation device of synchronous phase modulator and adjusting method |
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| CN105785188B (en) | 2018-06-19 |
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