CN208477026U - Dynamic electric voltage recovery device voltage support based on super capacitor tests test platform - Google Patents
Dynamic electric voltage recovery device voltage support based on super capacitor tests test platform Download PDFInfo
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- CN208477026U CN208477026U CN201820517708.8U CN201820517708U CN208477026U CN 208477026 U CN208477026 U CN 208477026U CN 201820517708 U CN201820517708 U CN 201820517708U CN 208477026 U CN208477026 U CN 208477026U
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Abstract
The utility model relates to the experiment testing fields of dynamic electric voltage recovery device, and in particular to the dynamic electric voltage recovery device voltage support based on super capacitor tests test platform.Dynamic electric voltage recovery device voltage support based on super capacitor tests test platform, comprising: programmable electric network fault simulation system is equipped with pwm circuit, 3 H-bridge inverter circuits and voltage controller；Programmable load system is equipped with load, load inverter, CAN bus and frequency-variable controller；Dynamic electric voltage recovery device is equipped with DC-DC circuit, sensors A, sensor B, master controller, super capacitor, rectifier, inverter, transformer A and transformer B；The master controller and the voltage controller, DC-DC circuit, sensors A and sensor B are communicated to connect.The utility model uses the dynamic electric voltage recovery device voltage support based on super capacitor and tests test platform, can complete the test to the indices of dynamic electric voltage recovery device, the dynamic electric voltage recovery device for facilitating test to research and develop.
Description
Technical field
The utility model relates to the experiment testing fields of dynamic electric voltage recovery device, and in particular to the dynamic based on super capacitor
Voltage restorer voltage support tests test platform.
Background technique
Dynamic electric voltage recovery device (DVR) is the tandem type dynamic power quality regulating device towards electrical load, it is quite
Voltage source dynamically controlled between electric system and electric load is connected in one.In distribution system normal power supply,
In stand-by state, loss is rather low for work.When certain quality of voltage problem occurs for power grid, can in several milliseconds to
System injects the voltage difference under power grid normal condition and malfunction, so that the voltages keep constant in load is constant.
Dynamic electric voltage recovery device, which has the advantage that, is lost that small, efficiency is relatively high in operational process, compact overall structure,
Small volume is smaller to the limitation of installation site；Other than main compensation steady state voltage falls, voltage surge can also be inhibited,
Voltage flicker inhibits voltage harmonic and threephase load imbalance etc. in power grid；Offset voltage, which is fallen, has the characteristics that rapidity,
It can be within the time of Millisecond by the voltage compensation fallen to normal value；Continual for a long time it can persistently carry out voltage benefit
It repays；Dynamic electric voltage recovery device is that offset voltage falls in problem the most economically and efficiently one of means, can be changed well
Kind power quality problem, the demand of current and later social development is catered to the electric power of high quality, high standard.
Due to the popularization and use of dynamic electric voltage recovery device, the test platform of experimental test is carried out for its function and data
Function it is sound also more important, in the prior art for dynamic electric voltage recovery device experimental test platform simulation test needed for
The type of electric network fault is fewer, and realizes that function is relatively single.
Utility model content
To solve the above-mentioned problems, the utility model provides the dynamic electric voltage recovery device voltage support based on super capacitor
Test platform is tested, the test to the indices of dynamic electric voltage recovery device can be completed, it is final for based on super capacitor
Can dynamic electric voltage recovery device tests out it meet every demand in market.
The purpose of this utility model is achieved through the following technical solutions:
Dynamic electric voltage recovery device voltage support based on super capacitor tests test platform, comprising:
Programmable electric network fault simulation system comprising PWM rectification circuit and 3 H-bridge inverter circuits and voltage control
The input terminal of device, the PWM rectification circuit connects power grid output end, and the output end of the PWM rectification circuit connects 3 simultaneously respectively
The input terminal of the H-bridge inverter circuit connect, 3 and the output end of H-bridge inverter circuit that connects connect the programmable load system；Institute
It states voltage controller and the PWM rectification circuit and 3 inverter circuits communicates to connect；
Programmable load system comprising load, load inverter, CAN bus and frequency-variable controller, the CAN bus
One end connect the output end of the H-bridge inverter circuit, the other end of the CAN bus connects the load, the load change
Frequency device connect with the payload communication and controls the load, and the frequency-variable controller and the load inverter communicate to connect；
Dynamic electric voltage recovery device system comprising DC-DC circuit, sensors A, sensor B, master controller, super capacitor,
Rectifier, inverter, transformer A and transformer B；The high-pressure side of the transformer A connects the power grid, the transformer A's
Low-pressure side connects the input terminal of the rectifier, and the output end of the rectifier connects the input terminal and DC-DC of the inverter
The output end of the input terminal of circuit, the inverter passes through the transformer B connection programmable load system；The DC-DC electricity
The output end on road connects the super capacitor；The sensors A is set to the input terminal of the PWM rectification circuit, acquires three-phase
Voltage signal；The sensor B is set to the port of the super capacitor, acquires the end voltage of the super capacitor；The master
Controller and the voltage controller, the DC-DC circuit, the sensors A and the sensor B are communicated to connect.
The inverter output end connected with passive filter as a further improvement of the utility model,.
Further, the input terminal of the input terminal of the rectifier and the inverter is provided with switching device.
Further, the switching device of the master controller and the rectifier input and the inverter input terminal
Switching device communicates to connect.
Further, the output end of the inverter connects one end of the CAN bus by transformer B.
The utility model has the beneficial effects that
The utility model has built the experiment test platform of the dynamic electric voltage recovery device voltage support based on super capacitor, solution
Determined electric network voltage flicker existing for petroleum place the problem of.The experiment test platform is by adding programmable electric network fault mould
Quasi- device and special load, according to collection in worksite and test data, for true site environment, electric network fault, electrical equipment shape
State is simulated, and is produced close to real voltage flickering fault condition, so that the scene for dynamic electric voltage recovery device is actually answered
It is ensured with data accumulation is provided with accurate.
Detailed description of the invention
Fig. 1 is that the dynamic electric voltage recovery device voltage support described in the utility model based on super capacitor tests test platform
Schematic diagram；
Fig. 2 is the topology diagram of the programmable electric network fault simulation system of the utility model；
Fig. 3 is the topology diagram of the dynamic electric voltage recovery device system of the utility model；
Fig. 4 is the topology diagram of the programmable load system of the utility model；
Fig. 5 is the voltage and current double closed-loop proportional plus integral control structure chart of the utility model；
Fig. 6 is the dynamic electric voltage controller control strategy structure chart increased after fuzzy logic controller of the utility model；
Wherein, 1- power grid, 2- may be programmed electric network fault simulation system, 3- programmable load system, 4-DC-DC circuit,
5- super capacitor, 6- rectifier, 7- inverter.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.
Dynamic electric voltage recovery device voltage support based on super capacitor tests test platform, as shown in Figure 1, comprising: can compile
Journey electric network fault simulation system 2, programmable load system 3 and dynamic electric voltage recovery device system；
Programmable electric network fault simulation system 2 includes PWM rectification circuit and 3 H-bridge inverter circuits and voltage controller,
It can be used for simulating the voltage flicker phenomenon as caused by thunder and lightning, line fault etc.；The input terminal of the PWM rectification circuit connects power grid
1 output end, the output end of the PWM rectification circuit connect 3 and the input terminal of H-bridge inverter circuit that connects respectively, 3 and connects
The output end of H-bridge inverter circuit connects the programmable load system 3, the voltage controller and the PWM rectification circuit and 3
A inverter circuit communication connection.
It is illustrated in figure 2 the topology diagram of programmable electric network fault simulation system 2, the programmable electric network fault mould
Quasi- device system 2, by after AC rectification, carries out inversion by 3 H-bridge inverter circuits, which can by PWM rectification circuit
To control the amplitude and phase angle of three-phase voltage respectively, it can simulate that three-phase voltage falls, unidirectional voltage is fallen and voltage phase angle is jumped
Become etc., while amplitude and the duration of Voltage Drop can be controlled by programming Control voltage controller.Voltage Drop amplitude
It is 0%~100%, the duration is 10ms~2s, which belongs to field failure simulator.
In order to simulate required electric network fault, the voltage controller issues voltage control instructions U firsta, Ub, Uc, desired electrical
Three-phase voltage is sinusoidal symmetrical under the conditions of net, voltage instruction are as follows:
In formula, AJust, BJust, CJustFor the amplitude of fundamental positive sequence, ω is the angular frequency of power grid.
In this way, taking software programming, to can produce three-phase voltage symmetrical, asymmetric for each phase voltage amplitude in change formula in real time
Fall or pump and rises failure；Similarly A is given by specified vector table variationJust, BJust, CJust, can simulating grid voltage fluctuation；And
Change the drift phenomenon of the specified then analog mains frequency of angular frequency in real time.Integral θ=∫ is carried out to electrical network angular frequency in formula simultaneously
Voltage phase angle θ can be obtained in ω dt.Obtained phase angle is added the interference signal Δ θ of a certain size and change direction
The various jumps at analogue phase angle.
Programmable load system 3 comprising load, load inverter, CAN bus and frequency-variable controller, the CAN bus
One end connect the output end of the H-bridge inverter circuit, the other end of the CAN bus connects the load, the load change
Frequency device connect with the payload communication and controls the load, and the frequency-variable controller and the load inverter communicate to connect simultaneously
Control the frequency-variable controller；As shown in figure 4, the programmable load system 3 simulates the load shape of actual field electrical equipment
State, so that the experimental condition of experiment porch more actualization, the low-voltage variation threshold of load inverter is controlled by frequency-variable controller
Value can set load and carry out the voltage of low-voltage variation, while can be become by the voltage of CAN bus real-time monitoring load-side
Change, sampled data can recorde preservation；The selection of load can be replaced according to different experiments, such as motor lifting
Load, the load of running at high speed property of motor or impact load etc..
Dynamic electric voltage recovery device system based on super capacitor, as shown in figure 3, including DC-DC circuit 4, sensors A, biography
Sensor B, master controller, super capacitor 5, rectifier 6, inverter 7, transformer A and transformer B；The high-pressure side of the transformer A
Power grid 1 is connected, low-pressure side connects the input terminal of the rectifier 6, and network voltage is reduced to the rectifier 6 by the transformer A
Input voltage after enter the dynamic electric voltage recovery device system；The output end of the rectifier 6 connects the defeated of the inverter 7
Enter the input terminal at end and DC-DC circuit 4, the output end of the inverter 7 is connected to the programmable load system by transformer B
One end of the CAN bus of system 3；The output end of the DC-DC circuit 4 connects the super capacitor 5；The sensors A is set
It is placed in the input terminal of the PWM rectification circuit, acquires three-phase voltage signal；The sensor B is set to the super capacitor 5
Port acquires the end voltage of the super capacitor 5；The master controller and the voltage controller, the DC-DC circuit 4, institute
State sensors A and sensor B communication connection；It connects between the output end of the inverter 7 and the transformer B nothing
Source filter, for filtering the distorted waveform and impurity signal that generate after DC inversion.
In the charging stage of the super capacitor 5, the three-phase alternating current of power grid 1 is through transformer A transformation, using rectifier
Enter the DC-DC circuit 4 after 6 rectifications, and stores into the super capacitor 5；In discharge regime, super capacitor 5 is provided directly
Galvanic electricity enters DC-DC circuit 4, and is three-phase alternating current by 7 inversion of inverter and after transformer B changes voltage class is
3 supply of electrical energy of programmable load system；The input terminal of the rectifier 6 and the input terminal of the inverter 7 are provided with
Switching device, the master controller and 2 equal communication connections of switching device, the master controller are collected by sensors A
The signal of the end voltage of three-phase voltage signal and the collected super capacitor 5 of sensor B, and make a response control rectification circuit and
The opening and closing of inverter circuit.
When the three-phase voltage of power grid 1, which identical amplitude occurs simultaneously, to be fallen, the dynamic electric voltage recovery device system passes through super
Grade 5 energy storage of capacitor obtains energy, by DC-DC circuit 4, using after three bridge arm switching tube copped wave inversion of three-phase by each phase LC
Power grid 1 is fed back to after filtering, final realize compensates the dynamic of three-phase voltage, maintains the stabilization of load terminal voltage.For this
The topological structure of the dynamic electric voltage recovery device system of kind accumulation energy type, it is contemplated that the state-of-charge of super capacitor 5 influences whether dynamic
The voltage support available energy of voltage restorer system, the present embodiment devise a kind of dynamic based on super capacitor feedback voltage
The control strategy of state voltage restorer, according to the end voltage for acquiring the super capacitor 5, setting fuzzy logic controller adjusts dynamic
The output voltage of state voltage restorer, so that dynamic electric voltage recovery device exports reasonable support electricity under different energy storage charge states
Pressure, under the premise of proof load electricity consumption is met the requirements, improves the utilization rate of super capacitor energy, it is extensive to extend dynamic electric voltage
The supporting time of multiple device.
After falling network voltage moment, the dynamic electric voltage recovery device system collects voltage signal by sensors A,
It is made a response by master controller and judges to fall and belonged to slight voltage and fall or depth Voltage Drop.Pass through setting in advance for system
It sets, the drop-off voltage of dynamic electric voltage recovery device starting can be set.When Voltage Drop is unsatisfactory for setting voltage, the super electricity
Appearance 5 and DC-DC circuit 4 do not work, and equipment itself carries out pressure stabilizing control；When Voltage Drop amplitude is big and is more than setting voltage,
The super capacitor 5 and DC-DC circuit 4 work, and carry out depth support to the voltage of electrical equipment.The dynamic electric voltage
When restorer system works, the work light of setting is lighted, and equipment is prompted to start to work；When super-capacitor voltage by
When electric discharge falls to the half of quota, the super capacitor 5 and DC-DC circuit 4 stop working；When power system restoration is normal
Afterwards, the super capacitor 5 carries out electric energy supplement by power grid side rectifier 6, can reduce dynamic electric voltage recovery device system in this way
The number of starts, while extending service life of equipment, prevent equipment receive network voltage interfere caused by error starting.Together
When, the dynamic electric voltage recovery device system based on super capacitor has the safeguard measures such as current protection, voltage protection and overheat protector.
In the present embodiment, the dynamic electric voltage recovery device voltage support experimental test platform based on super capacitor is estimated complete with
Under several experiments:
1) simulation single-phase voltage due to caused by route single-phase short circuit falls, and the dynamic electric voltage based on super capacitor is extensive
Multiple device carries out single-phase voltage support.Wherein, experimental design: it is 5%~30% that single-phase voltage, which falls amplitude, drop-out time 50ms
~1s.
2) three-phase voltage caused by grid stimulating device simulation three-phase instantaneous voltage sag as caused by the factors such as thunder and lightning
Instantaneously fall, the dynamic electric voltage recovery device can carry out voltage three-phase support at this time.Wherein, experimental design: three-phase voltage falls
Falling amplitude is 5%~30%, and drop-out time is 50ms~1s.
3) grid stimulating device is simulated since line fault voltage transient depth is fallen, and working line will be switched to siding
Road.The dynamic electric voltage recovery device carries out voltage three supports at this time.Wherein, experimental design: three-phase voltage falls as 50%~
100%, drop-out time is 100ms~5s.
4) with the dynamic electric voltage recovery device of fuzzy logic control modular
The compensation policy of the dynamic electric voltage recovery device uses same-phase compensation way, the method for specific implementation are as follows: uses
Voltage and current double closed-loop proportional integration PI (Proportional Integration) control as shown in Figure 5.Outer ring is voltage
Ring passes through the predetermined value of voltage；Inner ring is electric current loop, acts on and carries out electric current control to by the current-order of outer voltage output
System enables the electric current that actually enters of rectifier 6 to track to constant current, realizes the control of unity power factor sine-wave current.It is main
Controller compares current instantaneous value and current instruction value, and generates the switching signal that can be reduced current error, therefore master controller
Have the function of reducing error and generates modulation.
In view of charge and discharge nargin, the voltage phase of a super capacitor 5 is provided in the design of dynamic electric voltage recovery device
Prestige value Vsc_exp.The instantaneous sampling voltage of super capacitor is Vsc, VscWith Vsc_expDifference be Ve, VeAs fuzzy logic controller
Input.
The voltage change ratio of super capacitor 5 is about -1pu to 1pu.5 voltage deviation of super capacitor and its change rate are amplified
It handles to improve the sensitivity of system, i.e. the input quantity voltage deviation V of fuzzy logic controllereBasic domain be [- 10pu,
10pu], Linguistic Value is { NB, NM, NS, ZE, PS, PM, PB }.The change rate V of 5 voltage deviation of super capacitorecBasic domain be [-
10,10], Linguistic Value is { NB, NM, NS, ZE, PS, PM, PB }.Controller output is that dynamic electric voltage recovery device voltage support instructs
Basic domain is [- 1pu, 1pu], and Linguistic Value is { NB, NM, NS, NZ, ZE, PZ, PS, PM, PB }.When deviation and change of error
When rate is bigger, function degree of membership resolution ratio is lower, when voltage deviation and smaller voltage change ratio, function degree of membership resolution ratio
It is higher, guarantee accurate control.
Wherein: NB indicates negative big；During NM indicates negative；NS expression is born small；NZ indicates negative zero；ZE indicates zero；PZ indicates positive zero；
PS indicates just small；PM indicates center；PB indicates honest.
Fuzzy control rule is constituted by one group of fuzzy condition statement, and calculates the fuzzy pass of fuzzy control rule decision
System.The control rule that dynamic electric voltage recovery device output voltage U is extracted by empirical value, when voltage deviation is larger or voltage difference variation
In the case that rate is big, dynamic electric voltage recovery device system control support load voltage reaches load voltage protection threshold value, when super electricity
When appearance voltage deviation is smaller, dynamic electric voltage recovery device gives maximum voltage support, so that load voltage amplitude reaches voltage rating
Amplitude is fuzzy logic control state table as shown in table 1.
1 fuzzy logic control state table of table
Tab.1 Fuzzy logic rules for controller
As shown in fig. 6, in the dynamic electric voltage recovery device control strategy with super-capacitor voltage feedback, it is super by acquiring
The real-time voltage of capacitor 5.Output voltage and load protection threshold restriction are obtained by fuzzy logic controller, obtains ud_refGive
Definite value obtains SVPWM by Voltage loop electric current loop and controls signal, and dynamic electric voltage recovery device makes voltage support.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (5)
1. the dynamic electric voltage recovery device voltage support based on super capacitor tests test platform characterized by comprising
Programmable electric network fault simulation system (2) comprising PWM rectification circuit and 3 H-bridge inverter circuits and voltage control
Device, the input terminal of the PWM rectification circuit connect power grid (1) output end, and the output end of the PWM rectification circuit connects 3 respectively
The input terminal of H-bridge inverter circuit that is a and connecing, 3 and the output end of H-bridge inverter circuit that connects connect the programmable load system
It unites (3)；The voltage controller and the PWM rectification circuit and 3 inverter circuits communicate to connect；
Programmable load system (3) comprising load, load inverter, CAN bus and frequency-variable controller, the CAN bus
One end connects the output end of the H-bridge inverter circuit, and the other end of the CAN bus connects the load, the load frequency conversion
Device connect with the payload communication and controls the load, and the frequency-variable controller and the load inverter communicate to connect；
Dynamic electric voltage recovery device system comprising DC-DC circuit (4), sensors A, sensor B, master controller, super capacitor
(5), rectifier (6), inverter (7), transformer A and transformer B；The high-pressure side of the transformer A connects the power grid (1),
The low-pressure side of the transformer A connects the input terminal of the rectifier (6), and the output end connection of the rectifier (6) is described inverse
Become the input terminal of device (7) and the input terminal of DC-DC circuit (4), the output end of the inverter (7) passes through transformer B connection institute
State programmable load system (3)；The output end of the DC-DC circuit (4) connects the super capacitor (5)；The sensors A is set
It is placed in the input terminal of the PWM rectification circuit, acquires three-phase voltage signal；The sensor B is set to the super capacitor (5)
Port, acquire the end voltage of the super capacitor (5)；The master controller and the voltage controller, the DC-DC circuit
(4), the sensors A and sensor B communication connection.
2. the dynamic electric voltage recovery device voltage support based on super capacitor tests test platform according to claim 1, special
Sign is, inverter (7) the output end connected with passive filter.
3. the dynamic electric voltage recovery device voltage support based on super capacitor tests test platform according to claim 1, special
Sign is that the input terminal of the rectifier (6) and the input terminal of the inverter (7) are provided with switching device.
4. the dynamic electric voltage recovery device voltage support based on super capacitor tests test platform according to claim 3, special
Sign is, the master controller and the switching device of the rectifier (6) input terminal and the switch of the inverter (7) input terminal
Device communicates to connect.
5. the dynamic electric voltage recovery device voltage support based on super capacitor tests test platform according to claim 1, special
Sign is that the output end of the inverter (7) connects one end of the CAN bus by transformer B.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113381414A (en) * | 2021-06-18 | 2021-09-10 | 国网湖南省电力有限公司 | Multi-mode comprehensive control method of dynamic voltage restorer based on super capacitor energy storage |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113381414A (en) * | 2021-06-18 | 2021-09-10 | 国网湖南省电力有限公司 | Multi-mode comprehensive control method of dynamic voltage restorer based on super capacitor energy storage |
| CN113381414B (en) * | 2021-06-18 | 2022-08-23 | 国网湖南省电力有限公司 | Multi-mode comprehensive control method of dynamic voltage restorer based on super capacitor energy storage |
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Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Co-patentee after: China Petroleum Pipeline Engineering Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Co-patentee after: DESIGN BRANCH OF CHINA PETROLEUM PIPELINE ENGINEERING Corp. Address before: 100120 Beijing Xicheng District six laying Kang Co-patentee before: China Petroleum Pipeline Engineering Co.,Ltd. Patentee before: China National Petroleum Corp. Co-patentee before: DESIGN BRANCH OF CHINA PETROLEUM PIPELINE ENGINEERING Corp. |
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Effective date of registration: 20190919 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Co-patentee after: China Petroleum Pipeline Engineering Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Co-patentee after: CHINA PETROLEUM PIPELINE ENGINEERING Corp. Address before: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Co-patentee before: China Petroleum Pipeline Engineering Co.,Ltd. Patentee before: CHINA NATIONAL PETROLEUM Corp. Co-patentee before: DESIGN BRANCH OF CHINA PETROLEUM PIPELINE ENGINEERING Corp. |