CN103743981B - A kind of test system of static reacance generator - Google Patents
A kind of test system of static reacance generator Download PDFInfo
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- CN103743981B CN103743981B CN201410022335.3A CN201410022335A CN103743981B CN 103743981 B CN103743981 B CN 103743981B CN 201410022335 A CN201410022335 A CN 201410022335A CN 103743981 B CN103743981 B CN 103743981B
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Abstract
This application provides a kind of test system of static reacance generator, including low-voltage alternating current power supply, step-up transformer, high-voltage variable frequency power source and detection means, low-voltage alternating current power supply exports low-voltage AC, step-up transformer carries out boosting output high pressure three-phase alternating current to low-voltage three-phase AC electricity, high-voltage variable frequency power source receives high pressure three-phase alternating current and rated frequency and operating voltage according to static reacance generator to be measured export specific three-phase alternating current, and three-phase alternating current is electrically connected to static reacance generator to be measured, in the running of static reacance generator to be measured, voltage of the detection means to the output end of static reacance generator, electric current and phase are detected, judge whether the static reacance generator to be measured is qualified with this.The test system that i.e. the present embodiment is provided can be tested static reacance generator, to avoid substandard product from dispatching from the factory.
Description
Technical field
The application is related to electric and electronic technical field, more specifically to a kind of test system of static reacance generator
System.
Background technology
Static reacance generator is widely used in high-pressure reactive compensation field, technically reaches its maturity, using more and more wider.
The device can automatically adjust output reactive power, fast response time according to grid condition, and can realize electrodeless accurate compensation.
It is qualified to check whether before static reacance generator dispatches from the factory, it is necessary to which it is tested.
The content of the invention
In view of this, the application provides a kind of test system of static reacance generator, for static reacance generator
Tested, to avoid substandard product from dispatching from the factory.
To achieve these goals, it is proposed that scheme it is as follows：
A kind of test system of static reacance generator, including：
Low-voltage alternating current power supply, for providing three-phase alternating current；
Step-up transformer, for according to the three-phase alternating current electricity output three-phase high-voltage alternating current；
High-voltage variable frequency power source, for receiving the three-phase high-voltage alternating current and exporting the three-phase of predeterminated frequency and predeterminated voltage
Alternating current；
The variable frequency alternating current power source is also connected with static reacance generator to be measured；
Detection means, voltage, electric current and the phase of the output end for detecting the static reacance generator to be measured, to sentence
Whether the static reacance generator to be measured that breaks is qualified.
It is preferred that, the output voltage of the low-voltage alternating current power supply is 400 volts, and capacity is 500KVA.
It is preferred that, the step-up transformer is changed into than for 1:25, capacity is 630KVA.
It is preferred that, the output frequency of the high-voltage variable frequency power source is 20~70 hertz；
The predeterminated voltage is 1KV~35KV.
It is preferred that, large bulk capacitance is provided with the high-voltage variable frequency power source, for absorbing the static reacance hair to be measured
The reactive power of raw device output.
It is preferred that, in addition to：
Pressure regulator, is arranged between the low-voltage alternating current power supply and the step-up transformer.
It is preferred that, the input voltage of the pressure regulator includes 0~800 volt including 400 volts, output voltage.
It is preferred that, in addition to：
First switch, the electrical connection for turning on and off the low-voltage alternating current power supply and the pressure regulator.
It is preferred that, in addition to：
Second switch, for turning on and off the electrical connection between the pressure regulator and the step-up transformer.
It is preferred that, in addition to：
First voltage table, the output voltage for detecting the low-voltage alternating current power supply；
Second voltage table, the input voltage for detecting the pressure regulator；
Tertiary voltage table, the input voltage for detecting the step-up transformer.
It can be seen from the above technical proposal that the test system for the static reacance generator that the application is provided is handed over including low pressure
Flow power supply, step-up transformer, high-voltage variable frequency power source and detection means, low-voltage alternating current power supply output low-voltage AC, transformation of boosting
Device carries out boosting output high pressure three-phase alternating current to low-voltage three-phase AC electricity, and high-voltage variable frequency power source is also sent out with static reacance to be measured
Raw device is connected, in the running of static reacance generator to be measured, output end of the detection means to static reacance generator
Voltage, electric current and phase detected, judge whether the static reacance generator to be measured qualified with this.I.e. the present embodiment is provided
Test system static reacance generator can be tested, to avoid substandard product from dispatching from the factory.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of application, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
A kind of structure chart of the test system for static reacance generator that Fig. 1 provides for the embodiment of the present application；
The power cell topology diagram for the high-voltage variable frequency power source that Fig. 2 provides for the embodiment of the present application；
The control block diagram for the high-voltage variable frequency power source that Fig. 3 provides for the embodiment of the present application；
Fig. 4 is the one phase equivalent circuit figure of static reacance generator to be measured in the embodiment of the present application；
Fig. 5 is the electric current lead and lag active vector figure of static reacance generator to be measured in the embodiment of the present application；
A kind of structure chart of the test system for static reacance generator that Fig. 6 provides for another embodiment of the application；
A kind of structure chart of the test system for static reacance generator that Fig. 7 provides for the another embodiment of the application.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only some embodiments of the present application, rather than whole embodiments.It is based on
Embodiment in the application, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of the application protection.
Embodiment one
A kind of structure chart of the test system for static reacance generator that Fig. 1 provides for the embodiment of the present application.
As shown in figure 1, the test system that the present embodiment is provided includes low-voltage alternating current power supply 10, step-up transformer 20, high pressure
Variable-frequency power sources 30 and detection means 40, wherein step-up transformer transformer 20 are electric with low-voltage alternating current power supply 10, high-pressure frequency-conversion respectively
Source 30 is connected, and high-voltage variable frequency power source 30 is also connected with detection means 40.
Low-voltage alternating current power supply 10 is used to export three-phase alternating current, voltage preferably 400 volts, low-voltage AC of three-phase alternating current
The preferred 500KVA of capacity in source 10.
The three-phase alternating current that step-up transformer 20 is used to export low-voltage alternating current power supply 10 is boosted, and exports three-phase high-voltage
Alternating current, no-load voltage ratio is 1:25, the three-phase high-voltage alternating current that can be 10KV according to 400 volts of input voltage output voltage, capacity
It is preferred that 630KVA.
The input of high-voltage variable frequency power source 30 is connected with the output end of step-up transformer 20, for according to step-up transformer
The three-phase high-voltage exchange electricity output frequency conversion three-phase alternating current of 20 outputs.
High-voltage variable frequency power source 30 can realize the output in the range of 20~70 hertz, and voltage range connects from 1KV to 35KV
It is continuous adjustable.When being tested, corresponding frequency, such as 50 hertz are exported according to the rated frequency of static reacance generator 50 to be measured
Or 60 hertz.
The output end of high-voltage variable frequency power source 30 is connected with static reacance generator 50 to be measured, with according to static reacance to be measured
The rated frequency and operating voltage of generator 50 to its input three-phase alternating current it is tested, realize different operating frequency and
Different voltage class SVG test.
Detection means 40 is used for voltage, electric current and its phase for measuring the output end of static reacance generator 50, is sentenced with this
Whether the static reacance generator 50 to be measured that breaks is qualified.
Detection means 40 can be power analyzer or oscillograph etc..
It can be seen from the above technical proposal that the test system for the static reacance generator that the present embodiment is provided includes low pressure
AC power, step-up transformer, high-voltage variable frequency power source and detection means, low-voltage alternating current power supply output low-voltage AC, boosting become
Depressor carries out boosting output high pressure three-phase alternating current to low-voltage three-phase AC electricity, and high-voltage variable frequency power source is according to static reacance to be measured
The rated frequency and operating voltage of generator export corresponding three-phase alternating current, and are connected with static reacance generator to be measured,
In the running of static reacance generator to be measured, voltage, electric current of the detection means to the output end of static reacance generator
Detected with phase, judge whether the static reacance generator to be measured is qualified with this.The test system that i.e. the present embodiment is provided
Static reacance generator can be tested, to avoid substandard product from dispatching from the factory.
In addition, because the test system for the static reacance generator that the present embodiment is provided from high-voltage fence without receiving electricity
Power, therefore user can save the investment of high input voltage without introducing high-tension electricity；And it will not cause humorous to high-voltage fence
Wave interference.
Also at present some detection methods be two static reacance generators to dragging, this need two equipment capacity phase
Together, applicability is reduced, and the test system that the present embodiment is provided then is limited without this, can be to the static nothings of different voltage class
Work(generator is tested, and enhances applicability.
Main control module that high-voltage variable frequency power source 30 is made up of DSP and FPGA, AD signal acquisition modules, power unit module,
Fiber optic telecommunications module and human-computer interface module composition.The PWM for generating each power cell inverter side IGBT by main control module is opened
OFF signal, power unit module is sent to by fiber optic telecommunications module.Each power unit module is powered by isolating transformer.High pressure
Variable-frequency power sources 30 can output frequency, the adjustable sine voltage of amplitude, the adjustable range of electric voltage frequency is 20Hz to 70Hz.It is defeated
Man-machine interface can be passed through according to the rated frequency and rated voltage of static reacance generator 50 to be measured by going out electric voltage frequency and amplitude
Set.
Contain Large Copacity low-voltage capacitance in the inside of high-voltage variable frequency power source 30（It is not shown）, to ensure in Large Copacity static nothing to be measured
Perception or capacitive reactive power that static reacance generator 50 to be measured is sent can be fully absorbed during work(50 full load test of generator, therefore is treated
Survey static reacance generator 50 is in test process on power network without influence.
In addition to the overvoltage conventional except possessing of the device of high-voltage variable frequency power source 30, overheat, excessively stream etc. are protected, also with harmonic protection
Function, it is to avoid harmonic current is excessive in the test process of static reacance generator 50 to be measured damages great Rong inside high-voltage variable frequency power source
Measure low-voltage capacitance.The security and service life of test system can be improved.
The each phase of high-voltage variable frequency power source 30 is at most combined by 32 cascade of power units, and specific concatenation unit number can be with
Set by man-machine interface.Less cascaseded power cell is selected when the operating voltage of static reacance generator 50 to be measured is relatively low
Number, conversely, selecting more cascaseded power cell number, final high voltage variable when static reacance generator operating voltage to be measured is higher
Inverter side modulation ratio is stable between 0.5 to 0.95 when frequency power 30 works.Power cell topological structure is as shown in Figure 2.Phase shift
Transformer 31 exports three-phase alternating current and Large Copacity low-voltage capacitance C voltage stabilizings is used after the uncontrollable rectification of three-phase, it is ensured that in Large Copacity
Perception or capacitive that static reacance generator 50 to be measured is sent can be fully absorbed during 50 grid-connected test of static reacance generator to be measured
It is idle.
The control block diagram of high-voltage variable frequency power source 30 is as shown in figure 3, AD signal acquisition modules detect the defeated of Cascade H bridge inverter
Go out voltage, the voltage obtains Ud and Uq feedback signal after three phase static coordinate to two cordic phase rotators is changed.Given letter
Number Ud*For static reacance generator operating voltage to be measured, Uq*Perseverance is 0.Setting signal and feedback signal compare output and adjusted as PI
The input of device is saved, the output of pi regulator is given Usd*With given Usq*.Given Usd*With given Usq*Rotated by two-phase
Coordinate obtains three-phase voltage modulating wave Usa to three phase static coordinate transform*、Usb*、Usc*.Three-phase voltage modulating wave and triangle
Carrier wave produces the pwm switching signal control inverter switching device of control Cascade H bridge inverter using frequency multiplication phase-shifting carrier wave modulation system
Conducting and disconnection so that the adjustable sine voltage of cascaded H-bridges inverter output frequency, amplitude, meet different operating frequency
Rate, the static reacance generator test condition of operating voltage.
Three phase static coordinate is to two cordic phase rotator conversion formulas：
Two cordic phase rotators are to three phase static coordinate transform formula：
Fig. 4 is the one phase equivalent circuit figure of static reacance generator 50 to be measured.R is reactor loss and static reacance hair in figure
The summation that raw device is lost in itself.Take that d axles and the output voltage vector Us of high-voltage variable frequency power source 30 are coaxial, q axles are ahead of 90 ° of d axles.Treat
The vectogram of static reacance generator electric current lead and lag work is surveyed as shown in the figure (a) in Fig. 5 and figure (b).It is to be measured static
The output voltage of reacance generator 50 differs 90 ° with electric current I, illustrates that static reacance generator 50 to be measured does not need active energy.And
High-voltage variable frequency power source output voltage Us and electric current I phase difference are no longer 90 °, but smaller than 90 ° δ angles.In static nothing to be measured
During work(generator 50 is grid-connected, changing δ angles makes on the internal capacitor charge or discharge of static reacance generator 50 to be measured, electric capacity
Voltage change, the output voltage amplitude of static reacance generator 50 to be measured also changes, and works as Ug>It is to be measured static during Us
The advanced output voltage of high-voltage variable frequency power source 30 of the output current of reacance generator 50, sends reactive power, plays the work of adjustable condenser
With；Work as Ug<During Us, the delayed output voltage of high-voltage variable frequency power source 30 of the output current of static reacance generator 50 to be measured absorbs idle
Power, plays REgulatable reactor.When carrying out 50 grid-connected test of static reacance generator to be measured, no matter static reacance to be measured is sent out
Raw device 50 sends or absorbed great reactive power, and high-voltage variable frequency power source 30 all only needs to provide minimum active power to supplement
The loss of circuit, maintains the voltage on DC capacitor.According to conservation of energy principle, this part active power is ultimately from low pressure
AC power 10.
In summary, when being tested with the present invention, it is idle by high-pressure frequency-conversion that static reacance generator 50 to be measured is sent
The internal mass low-voltage capacitance of power supply 30 absorbs, and does not have any influence, and low-voltage alternating current power supply 10 on low-voltage alternating current power supply 10
The minimum active power of consumption is to supplement the switching loss of the circuit loss and power component of whole device, and active power loss is low
In the 2% of the rated power of static reacance generator 50 to be measured.The static nothing of Large Copacity can be realized in small-capacity low-pressure power-supply system
Work(generator full load test.
Embodiment two
A kind of structure chart of the test system for static reacance generator that Fig. 6 provides for another embodiment of the application.
As shown in fig. 6, test system disclosed in the present embodiment is to be additionally arranged pressure regulator 60 on the basis of a upper embodiment.
Pressure regulator 60 is arranged between low-voltage alternating current power supply 10 and step-up transformer 20.
Pressure regulator 60 is used to the output voltage of low-voltage alternating current power supply 10 is adjusted, situation of the input voltage at 400 volts
Under, output voltage can between 0~800 volt continuously adjustabe.
Embodiment three
A kind of structure chart of the test system for static reacance generator that Fig. 7 provides for the another embodiment of the application.
As shown in fig. 7, the test system that the present embodiment is provided is to be additionally arranged first switch on the basis of a upper embodiment
11st, second switch 61, first voltage table 12, second voltage table 62 and tertiary voltage table 21.
First switch 11 is arranged between low-voltage alternating current power supply 10 and pressure regulator 60, for cutting off or turning on therebetween
Electrical connection.
Second switch 61 is arranged between pressure regulator 60 and step-up transformer 20, for turning on and off pressure regulator 60 and liter
Electrical connection between pressure transformer 20.
First voltage table 12 is connected with the output end of low-voltage alternating current power supply 10, for detecting the defeated of low-voltage alternating current power supply 10
Go out voltage.
Second voltage table 62 is connected with the input of pressure regulator 60, the input voltage for detecting pressure regulator 60.
Tertiary voltage table 21 is arranged on the input of step-up transformer 20, the input electricity for detecting step-up transformer 20
Pressure.
Finally, in addition it is also necessary to explanation, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between there is any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or equipment including a series of key elements not only include that
A little key elements, but also other key elements including being not expressly set out, or also include be this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except also there is other identical element in the process including the key element, method, article or equipment.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and other
Between the difference of embodiment, each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use the application.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can in other embodiments be realized in the case where not departing from spirit herein or scope.Therefore, the application
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (6)
1. a kind of test system of static reacance generator, it is characterised in that including：
Low-voltage alternating current power supply, for providing three-phase alternating current；
Step-up transformer, for according to the three-phase alternating current electricity output three-phase high-voltage alternating current；
High-voltage variable frequency power source, for receiving the three-phase high-voltage alternating current and exporting the three-phase alternating current of predeterminated frequency and predeterminated voltage
Electricity；High-voltage variable frequency power source is by main control module, AD signal acquisition modules, power unit module, fiber optic telecommunications module and man-machine boundary
Face mould block is constituted；Each power cell inverter side IGBT pwm switching signal is generated by main control module, is passed by fiber optic telecommunications module
It is sent to power unit module；Each power unit module is powered by isolating transformer；
The variable frequency alternating current power source is also connected with static reacance generator to be measured；
Detection means, voltage, electric current and the phase of the output end for detecting the static reacance generator to be measured, to judge
Whether qualified state static reacance generator to be measured；
The output voltage of the low-voltage alternating current power supply is 400 volts, and capacity is 500KVA；
The step-up transformer is changed into than for 1:25, capacity is 630KVA；
The output frequency of the high-voltage variable frequency power source is 20~70 hertz；
The predeterminated voltage is 1KV~35KV；
Large bulk capacitance is provided with the high-voltage variable frequency power source, the nothing for absorbing the static reacance generator output to be measured
Work(power；
The control mode of the high-voltage variable frequency power source is that AD signal acquisition modules detect the output voltage of Cascade H bridge inverter, should
Voltage obtains Ud and Uq feedback signal after three phase static coordinate to two cordic phase rotators is changed；Setting signal Ud*To treat
Survey static reacance generator operating voltage, Uq*Perseverance is 0；Setting signal and feedback signal compare output as the input of adjuster,
The output of adjuster is given Usd*With given Usq*；Given Usd*With given Usq*It is quiet to three-phase by two cordic phase rotators
Only coordinate transform and obtain three-phase voltage modulating wave Usa*、Usb*、Usc*；Three-phase voltage modulating wave and triangular carrier use frequency multiplication
Phase-shifting carrier wave modulation system produces the conducting and disconnection of the pwm switching signal control inverter switching device of control Cascade H bridge inverter,
So that the adjustable sine voltage of cascaded H-bridges inverter output frequency, amplitude, different operating frequency, operating voltage are met
Static reacance generator test condition.
2. test system as claimed in claim 1, it is characterised in that also include：
Pressure regulator, is arranged between the low-voltage alternating current power supply and the step-up transformer.
3. test system as claimed in claim 2, it is characterised in that the input voltage of the pressure regulator includes 400 volts, output
Voltage includes 0~800 volt.
4. test system as claimed in claim 3, it is characterised in that also include：
First switch, the electrical connection for turning on and off the low-voltage alternating current power supply and the pressure regulator.
5. test system as claimed in claim 4, it is characterised in that also include：
Second switch, for turning on and off the electrical connection between the pressure regulator and the step-up transformer.
6. test system as claimed in claim 5, it is characterised in that also include：
First voltage table, the output voltage for detecting the low-voltage alternating current power supply；
Second voltage table, the input voltage for detecting the pressure regulator；
Tertiary voltage table, the input voltage for detecting the step-up transformer.
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| CN109642918B (en) * | 2016-08-24 | 2021-03-09 | 东芝三菱电机产业系统株式会社 | Power-on evaluation test device of input filter for pulse width modulation converter |
| CN106646040B (en) * | 2016-12-05 | 2019-04-12 | 上海希形科技有限公司 | The automatic calibration test system of APF/SVG module and test method |
| CN108663592B (en) * | 2018-06-08 | 2024-05-14 | 河南森源电气股份有限公司 | Opposite-dragging type SVG module debugging platform and method |
| CN111579892B (en) * | 2019-02-15 | 2021-06-29 | 株洲中车时代电气股份有限公司 | Test system and method for cascaded SVG power module |
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Address after: 570216 7 Haikou Free Trade Zone, 168 Nanhai Road, Haikou, Hainan. Patentee after: Hainan Jinpan intelligent Polytron Technologies Inc Address before: 570216 7 Haikou Free Trade Zone, 168 Nanhai Road, Haikou, Hainan. Patentee before: Hainan Jinpan Electric Co., Ltd. |