CN204495941U - A kind of power quality controlling equipment test system - Google Patents
A kind of power quality controlling equipment test system Download PDFInfo
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- CN204495941U CN204495941U CN201520224906.1U CN201520224906U CN204495941U CN 204495941 U CN204495941 U CN 204495941U CN 201520224906 U CN201520224906 U CN 201520224906U CN 204495941 U CN204495941 U CN 204495941U
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- isolating switch
- power quality
- electrical network
- network simulation
- controlling equipment
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Abstract
The utility model relates to a kind of power quality controlling equipment test system, comprise an electrical network simulation test device, the input end of described electrical network simulation test device is connected with the second end of the first isolating switch, the output terminal of described electrical network simulation test device is connected with the first end of the second isolating switch, second end of described second isolating switch is connected with the first end of the 3rd isolating switch and the first end of the 4th isolating switch respectively, second end of described 3rd isolating switch is connected with a test product, second end of described 4th isolating switch is connected with an electrical energy power quality disturbance generating means, also comprise a system monitoring console, described system monitoring console respectively with the output terminal of electrical network simulation test device, second end of the second isolating switch, the first end of the 3rd isolating switch and the first end of the 4th isolating switch connect.The utility model can simulating grid actual conditions and electrical energy power quality disturbance a situation arises, device structure is simple, multiple functional, and reduces holistic cost.
Description
Technical field
The utility model relates to a kind of power quality controlling equipment test system, simulates various quality of power supply phenomenon in the lab, for basic platform is set up in the measurement of the electrical network quality of power supply, analysis, assessment and control.
Background technology
At present, a lot of power quality controlling equipment runs in electrical network, and reliable and stable in order to ensure that equipment runs, need in advance to power quality controlling testing equipment and test, this just needs a kind of pilot system.In this pilot system, need a large power, electrically potential source, the voltage condition of electrical network is simulated, meet all test items that test platform can carry out required by Related product national standard or industry standard, comprise voltage fluctuation and flicker, frequency change, electrical network three-phase imbalance, reactive-load compensation and harmonic voltage test etc.Need current disturbing generating means in addition, the current disturbing situation of electrical network is simulated, meet all test items that pilot system can be carried out required by Related product national standard or industry standard, comprise current overload ability, Harmonic Current Distortion etc.The application, in conjunction with the specific requirement of power quality controlling equipment test system, proposes a kind of pilot system, can be used for the real as far as possible power grid environment of simulation and current disturbing environment, with the satisfied test to power quality controlling equipment and testing requirements.
The pilot system of power quality controlling equipment is made up of electrical network simulation test device, electrical energy power quality disturbance generating means and system monitoring part.As the large power, electrically potential source of electrical network simulation test device, its equivalent resistance is adjustable, can simulate the characteristic of test product under different electrical network parameter.Electrical energy power quality disturbance generating means should be able to meet the requirement of test product reactive-load compensation, the test of harmonic wave generating function, can send and be not less than the capacitive of test product rated current or the reactive current of perception or harmonic current, and amplitude and direction is adjustable online.
The domestic and international research for grid stimulating device not system at present, and there is no corresponding standards and norms.At present, many to the research of voltage sag simulation device, the research of special electrical network simulation test device is less.The research of some relevant researchs mainly Focus Control method, and pay close attention to the little of grid stimulating device.Analog power performance on market is incomplete and expensive, both at home and abroad for the research also not system of current disturbing simulation, harmonic oscillator performance on market is incomplete and expensive, these bring very large inconvenience all to the research of power quality controlling equipment and test, study so necessary high-power electrical network simulation test device and electrical energy power quality disturbance generating means.
Summary of the invention
The purpose of this utility model is to provide a kind of power quality controlling equipment test system, include high-power electrical network simulation test device and electrical energy power quality disturbance generating means, this system summarizes the function that pilot system should realize on the satisfied basis to high-power power quality controlling testing of equipment demand, can simulating grid actual conditions and disturbance a situation arises, device structure is simple, multiple functional, and reduce holistic cost.
The utility model realizes by the following technical solutions for achieving the above object: a kind of power quality controlling equipment test system, it is characterized in that: comprise an electrical network simulation test device, the input end of described electrical network simulation test device is connected with the second end of the first isolating switch, the output terminal of described electrical network simulation test device is connected with the first end of the second isolating switch, second end of described second isolating switch is connected with the first end of the 3rd isolating switch and the first end of the 4th isolating switch respectively, second end of described 3rd isolating switch is connected with a test product, second end of described 4th isolating switch is connected with an electrical energy power quality disturbance generating means, also comprise a system monitoring console, described system monitoring console respectively with the output terminal of electrical network simulation test device, second end of the second isolating switch, the first end of the 3rd isolating switch and the first end of the 4th isolating switch connect,
In the utility model one embodiment, described electrical network simulation test device comprises a start unit, an energy conversion unit, a filter unit and an inspection and control system, described start unit, energy conversion unit, filter unit connect successively, described energy conversion unit is also connected with one end of described inspection and control system, the other end of described inspection and control system is connected with described filter unit, and described filter unit is connected with described test product.
In the utility model one embodiment, described energy conversion unit is formed in parallel by three monophase systems, and described monophase system is in series by a rectification circuit, an inverter circuit, a LC filtering circuit, and one end of described LC filtering circuit is for hold altogether.
In the utility model one embodiment, described rectification circuit and inverter circuit all adopt wholly-controled device.
In the utility model one embodiment, described rectification circuit is three-phase PWM rectification circuit.
In the utility model one embodiment, described inverter circuit is single-phase PWM inverter circuit.
The utility model compared with prior art has following beneficial effect:
1, the utility model is by the output of PWM rectification and inverter circuit control simulation amount, the actual response actual conditions of line voltage;
2, the utility model drives inverter circuit to control current disturbing analog output by PWM, real reaction power network current disturbance situation;
3, the utility model can meet electrical network simulation test and the current disturbing test of high-power test product.
Accompanying drawing explanation
Fig. 1 is the utility model system architecture schematic diagram.
Fig. 2 is the utility model electrical network simulation test device structural representation.
Fig. 3 is the utility model energy conversion unit main circuit structure figure.
Fig. 4 is the utility model inspection and control system structural representation.
Fig. 5 is the utility model electrical energy power quality disturbance generating means structural representation.
In figure: 11-first isolating switch; 12-second isolating switch; 13-the 3rd isolating switch; 14-the 4th isolating switch; 2-monophase system; 21-rectification circuit; 22-inverter circuit; 23-LC filtering circuit.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
Please refer to Fig. 1, the utility model provides a kind of power quality controlling equipment test system, it is characterized in that: comprise an electrical network simulation test device, the input end of described electrical network simulation test device is connected with the second end of the first isolating switch 11, the output terminal of described electrical network simulation test device is connected with the first end of the second isolating switch 12, second end of described second isolating switch 12 is connected with the first end of the 3rd isolating switch 13 and the first end of the 4th isolating switch 14 respectively, second end of described 3rd isolating switch 13 is connected with a test product, second end of described 4th isolating switch 14 is connected with an electrical energy power quality disturbance generating means, also comprise a system monitoring console, described system monitoring console respectively with the output terminal of electrical network simulation test device, second end of the second isolating switch 12, the first end of the 3rd isolating switch 13 and the first end 14 of the 4th isolating switch connect,
Described electrical network simulation test device, by rectification, inversion and filtering, exports simulating grid voltage;
Described electrical energy power quality disturbance generating means adopts wholly-controled device that three-phase alternating current is rectified into DC voltage, then adopts electric current loop current constant control, exports completely controlled reactive current and harmonic current;
Described system monitoring console for gather and control the simulating grid voltage that described electrical network simulation test device exports, reactive current and harmonic current, the output of described test product and the quality of power supply of bus that described electrical energy power quality disturbance generating means exports, response time of calculating test product, harmonic compensation rate and loss.
Please refer to Fig. 2, described electrical network simulation test device comprises a start unit, an energy conversion unit, a filter unit and an inspection and control system, described start unit, energy conversion unit, filter unit connect successively, described energy conversion unit is also connected with one end of described inspection and control system, the other end of described inspection and control system is connected with described filter unit, and described filter unit is connected with described test product.
Please refer to Fig. 3, described energy conversion unit is formed in parallel by three monophase systems 2, and described monophase system 2 is in series by rectification circuit 21, inverter circuit 22, LC filtering circuit 23, and one end of described LC filtering circuit 23 is for hold altogether.
In the present embodiment, described rectification circuit 21 and inverter circuit 22 all adopt wholly-controled device.
In the present embodiment, described rectification circuit 21 is three-phase PWM rectification circuit.
In the present embodiment, described inverter circuit 22 is single-phase PWM inverter circuit, described single-phase PWM inverter circuit carries out inversion by the conducting of wholly-controled device with the DC voltage that rectification circuit 21 produces by shutoff, described DC voltage is changed into the PWM voltage waveform with sine wave equivalence.
Please refer to Fig. 4, also comprise a background system, described inspection and control system gathers line voltage, bridge arm current, DC voltage, output voltage, output current and inductive current, by carrying out the grid condition of control simulation needs to described energy conversion unit, and realize the data communication with described background system.
In order to allow those skilled in the art better understand the technical solution of the utility model, below in conjunction with accompanying drawing, the utility model is described in detail.
Be illustrated in figure 3 the utility model energy conversion unit main circuit structure figure, its specific works principle is as follows: in cook's state, circuit breaker Q F1 is in off-state.When device needs to power on, circuit breaker Q F1 closes, the analog voltage that will realize due to mimic channel comprises the function of higher harmonic components fault, needs the subsystem rectification side of three-phase separate, and A, B, C three-phase produces DC voltage by three pulse width modulation (PWM) rectification circuits respectively.Like this, energy conversion unit is made up of three monophase systems 2, each monophase system 2 exports a phase of simulating grid, the circuit structure of each monophase system 2 can be divided into rectifying part and Converting Unit: rectifying part adopts rectification circuit 21 to realize, adopt three-phase PWM rectification circuit herein, by the line voltage rectification of input, adopt a direct current capacitance voltage stabilizing at outgoing side, for inverter circuit 22 below provides galvanic current pressure.The energy feedback that the three-phase PWM rectification of rectifying part can make the active load of tested system produce, to electrical network, realizes the two-way flow of energy.
Inverter circuit 22 adopts single-phase PWM inverter circuit to realize, inverter circuit 22 is by the turn-on and turn-off of the driving circuit control device of switching device, the DC voltage produced by rectification circuit 21 carries out inversion, DC voltage is converted into the PWM voltage waveform with sine wave equivalence, it is the square wave that dutycycle constantly changes that the brachium pontis of inverter exports, and therefore exports at brachium pontis and adds that low-pass filter is with filtering higher hamonic wave.
Be illustrated in figure 4 the utility model inspection and control system structural representation, inspection and control system detection of grid voltage, bridge arm current, DC voltage, output voltage, output current and inductive current, pass through data acquisition and procession, energy conversion unit is controlled, simulate the grid condition of various needs, and realize carrying out data communication with backstage.
Be illustrated in figure 5 electrical energy power quality disturbance generating means structural representation of the present invention, its specific works principle is as follows: during original state, circuit breaker Q F1 and contactor KM1 is all in off-state, when electrical energy power quality disturbance generating means needs to power on, QF1 is first made to close, through diode full-bridge uncontrollable rectifier, charging is carried out to device DC bus capacitance by current-limiting resistance and also slowly set up DC voltage, after continuing for some time, after charging voltage reaches steady state value, control system closes KM1, by current-limiting resistance bypass, enter through full bridge PWM (pulse-length modulation) rectification circuit again and entirely control mode of operation, namely IGBT work enters PWM rectification state, and DC capacitor voltage is stablized to setting value, PWM rectification soft start-up process terminates.
Now, monitoring system is regulated to receive harmonic current, reactive power, the superposition situation reference value of backstage setting, adjustment monitoring system is sent to reference to value and the actual data exported of device, obtain with reference to modulation signal after closed-loop control, this reference modulation signal carries out PWM through drive circuit unit and modulates rear drive convertor circuit, the harmonic current needed for generation and reactive current.The output current of convertor circuit, through the wave filter of LCL topological structure, removes the higher hamonic wave that in output current, IGBT HF switch produces, and ensures degree of stability and the precision of output harmonic wave electric current and reactive current.
The foregoing is only preferred embodiment of the present utility model, all equalizations done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (6)
1. a power quality controlling equipment test system, it is characterized in that: comprise an electrical network simulation test device, the input end of described electrical network simulation test device is connected with the second end of the first isolating switch, the output terminal of described electrical network simulation test device is connected with the first end of the second isolating switch, second end of described second isolating switch is connected with the first end of the 3rd isolating switch and the first end of the 4th isolating switch respectively, second end of described 3rd isolating switch is connected with a test product, second end of described 4th isolating switch is connected with an electrical energy power quality disturbance generating means, also comprise a system monitoring console, described system monitoring console respectively with the output terminal of electrical network simulation test device, second end of the second isolating switch, the first end of the 3rd isolating switch and the first end of the 4th isolating switch connect.
2. power quality controlling equipment test system according to claim 1, it is characterized in that: described electrical network simulation test device comprises a start unit, an energy conversion unit, a filter unit and an inspection and control system, described start unit, energy conversion unit, filter unit connect successively, described energy conversion unit is also connected with one end of described inspection and control system, the other end of described inspection and control system is connected with described filter unit, and described filter unit is connected with described test product.
3. power quality controlling equipment test system according to claim 2, it is characterized in that: described energy conversion unit is formed in parallel by three monophase systems, described monophase system is in series by a rectification circuit, an inverter circuit, a LC filtering circuit, and one end of described LC filtering circuit is for hold altogether.
4. power quality controlling equipment test system according to claim 3, is characterized in that: described rectification circuit and inverter circuit all adopt wholly-controled device.
5. power quality controlling equipment test system according to claim 3, is characterized in that: described rectification circuit is three-phase PWM rectification circuit.
6. power quality controlling equipment test system according to claim 3, is characterized in that: described inverter circuit is single-phase PWM inverter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520224906.1U CN204495941U (en) | 2015-04-14 | 2015-04-14 | A kind of power quality controlling equipment test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520224906.1U CN204495941U (en) | 2015-04-14 | 2015-04-14 | A kind of power quality controlling equipment test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204495941U true CN204495941U (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520224906.1U Expired - Fee Related CN204495941U (en) | 2015-04-14 | 2015-04-14 | A kind of power quality controlling equipment test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204495941U (en) |
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2015
- 2015-04-14 CN CN201520224906.1U patent/CN204495941U/en not_active Expired - Fee Related
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150722 |
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| CF01 | Termination of patent right due to non-payment of annual fee |