CN204154835U - High-capacity direct current electrical apparatus test device - Google Patents
High-capacity direct current electrical apparatus test device Download PDFInfo
- Publication number
- CN204154835U CN204154835U CN201420669719.XU CN201420669719U CN204154835U CN 204154835 U CN204154835 U CN 204154835U CN 201420669719 U CN201420669719 U CN 201420669719U CN 204154835 U CN204154835 U CN 204154835U
- Authority
- CN
- China
- Prior art keywords
- speed regulator
- test
- inductor
- input end
- mutual
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model relates to Electrical Testing technical field, discloses a kind of high-capacity direct current electrical apparatus test device.It comprises rectifier transformer T1, rectifier D, accompanies test product circuit breaker Q F2, accompanies test product contactor KM1, test specimen X1, DC speed regulator A, rectifier D described in the utility model have employed controllable silicon as rectifying device, voltage can be realized from 0 to the smooth adjustment of maximal value, expand the voltage regulation limits of high-capacity direct current test unit; Control and scheduling co-design can be realized according to each silicon controlled electric current, enhance the security of testing equipment, reliability, improve the serviceable life of testing equipment; Have employed DC speed regulator A, achieve the Digital Control of direct supply, both can be regulated by potential regulator B3 at the scene, and also can be regulated by remote computer, make the voltage-regulation of test unit quick, convenient; The utility model can carry out detection experiment for the electrical equipment of 2-4KV electric pressure.
Description
Technical field
The utility model relates to Electrical Testing technical field, specifically a kind of high-capacity direct current electrical apparatus test device being applicable to low-voltage direct test.
Background technology
Saving technology, power-saving technology will be the important technologies of future development, and these technology comprise: combined cycle, connection Electricity Federation product, heat pump, energy-efficient lamp, energy-saving building technology, Power Electronic Technique, source benefit audit etc.Along with the development of power technology, adopt the electrical equipment of direct current supply technology to get more and more, play an important role in renewable energy utilization.Current Sci-Tech Level, still can not rely on simulation calculation to solve to the performance of high-capacity direct current device for switching, and the information that the development of product must be provided by high-capacity direct current testing station and experience, verify whether can shape and produce eventually through testing.
China's DC electric apparatus technology has had significant progress in recent years, especially 2-4KV DC electric apparatus product is that capacity or function all have increased significantly, but the DC experiment fairing of Electrical Testing mechanism also selects diode as rectifying device, voltage-regulation is that the output voltage by changing rectifier transformer realizes.
Utility model content
The purpose of this utility model is to provide a kind of high-capacity direct current electrical apparatus test device, little to solve existing 2-4KV DC electric apparatus product detection device voltage regulation limits, regulates inconvenient problem.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
A kind of high-capacity direct current electrical apparatus test device, it comprises rectifier transformer T1, rectifier D, accompany test product circuit breaker Q F2, accompany test product contactor KM1, test specimen X1, described rectifier transformer T1 is connected on power source bus, and described rectifier transformer T1 is connected with one end of harmonics circuit breaker Q F1, the other end and the first D.C mutual-inductor T2 be arranged on power source bus L1 of described harmonics circuit breaker Q F1, second D.C mutual-inductor T3, 3rd D.C mutual-inductor T4, the input end of the 4th D.C mutual-inductor T5 is connected, described first D.C mutual-inductor T2, second D.C mutual-inductor T3, 3rd D.C mutual-inductor T4, the output terminal of the 4th D.C mutual-inductor T5 is connected with the input end of alternating current measurement processor B1, and the output terminal of described alternating current measurement processor B1 is connected with DC speed regulator A, by the first D.C mutual-inductor T2, second D.C mutual-inductor T3, 3rd D.C mutual-inductor T4, ac supply signal on the power source bus L1 collected is transferred to described DC speed regulator A by the 4th D.C mutual-inductor T5, is realized the monitoring of AC power by DC speed regulator A,
The other end of described harmonics circuit breaker Q F1 is also connected with another road power source bus L2, described power source bus L2 is respectively equipped with the first fuse F1, second fuse F2, 3rd fuse F3, 4th fuse F4, described second fuse F2 is connected with the input end of the second control transformer T7 by A.C. contactor KM2, the output terminal of the second control transformer T7 is connected with the input end of alternating voltage synchronous acquisition processor B 2, described 3rd fuse F3 is connected with the input end of described alternating voltage synchronous acquisition processor B 2 by A.C. contactor KM2, described 4th fuse F4 is connected with the input end of the first control transformer T6, the output terminal of described first control transformer T6 is connected with the input end of described alternating voltage synchronous acquisition processor B 2 by A.C. contactor KM2, the output terminal of described alternating voltage synchronous acquisition processor B 2 is connected with the input end of first point of pressing plate B4, the output terminal of described first point of pressing plate B4 is connected with described DC speed regulator A, synchronous acquisition and the detection of ac voltage signal are input to described alternating voltage synchronous acquisition processor B 2 by described first control transformer T6, described second control transformer T7 after described A.C. contactor KM2 controls, through described alternating voltage synchronous acquisition processor B 2 acquisition process, then by inputing to described DC speed regulator A after first point of pressing plate B4 voltage division processing,
Described A.C. contactor KM2 is connected with the input end of I/O converter Z1, the output terminal of described I/O converter Z1 is connected with the input end of described DC speed regulator A, the output terminal of described first control transformer T6 is also connected with the alternating voltage test side of described DC speed regulator A, the input end of described DC speed regulator A is also connected with potential regulator B3, and described DC speed regulator A is connected with remote computer by computer interface Z2; The output terminal of described DC speed regulator A is connected with the input end of pulse amplifier B6, and the silicon controlled gate pole that the output terminal of described pulse amplifier B6 is corresponding with described rectifier D is connected; After described potential regulator B3 or remote computer Long-distance Control regulate the voltage signal of described DC speed regulator A, pulse signal is sent by described DC speed regulator A, pulse signal is transferred to controllable silicon gate pole corresponding in described rectifier D after described pulse amplifier B6 amplifies, and realizes the control exporting DC voltage size;
Described rectifier D is connected on described power source bus L1, the DC output end of described rectifier D by be in parallel accompany test product DC circuit breaker QF2, accompany test product D.C. contactor KM1 and adjustable resistor Rx, adjustable reactance device Lx, shunt P, test specimen X1 be in series, composition test specimen test loop, described adjustable resistor Rx, described adjustable reactance device Lx are used for adjusting the size of electric current in described test specimen test loop, and described shunt P1 is used for gathering the electric current stated in test specimen test loop;
Described test specimen test loop is parallel with second point of pressing plate B5, described second point of pressing plate B5 is connected with described DC speed regulator A, by the Voltage Feedback of described test specimen X1 test loop to described DC speed regulator A.
As further improvement of the utility model, described power source bus L1 is parallel with voltage dependent resistor (VDR) U at the input end of described rectifier D, realizes the overvoltage protection of circuit.
Further improve as of the present utility model, described rectifier D adopts controllable silicon V as rectifying device, and each controllable silicon V and sensor TA, the fastp-acting fuse FU composition one group of rectification that is in series is combined, and sensor TA all can detect the electric current on each road.
Further improve as of the present utility model, described DC speed regulator A is provided with voltage indicating gauge S1, electric current indicating gauge S2, in order to show DC voltage value in described test specimen test loop and DC current values.
Further improve as of the present utility model, described DC speed regulator A is also provided with power interface J1, for described DC speed regulator A provides the AC power needed for self-operating.
Described in the utility model, DC speed regulator A adopts model to be the DC speed regulator of 6RA70.
The beneficial effects of the utility model are:
(1) rectifier D described in the utility model have employed controllable silicon as rectifying device.Controllable silicon, it is the abbreviation of silicon controlled rectifier, it is a kind of large power semiconductor device with the four-layer structure of three PN junctions, also thyristor is called, have the features such as volume is little, structure is relatively simple, function is strong, silicon controlled rectifier device is a kind of very important power device, can be used to the control doing high voltage and high electric current, the rated current of silicon-controlled device can from several milliamperes to more than 5000A, and rated voltage can more than 10000V.Voltage can be realized from 0 to the smooth adjustment of maximal value in the utility model, expand the voltage regulation limits of high-capacity direct current test unit;
(2) in the utility model, have employed the DC speed regulator A that model is 6RA70, achieve the Digital Control of direct supply, both can be regulated by potential regulator B3 at the scene, also can be regulated by remote computer, and make the voltage-regulation of test unit quick, convenient;
(3) in the utility model, fastp-acting fuse FU is adopted to the protection of controllable silicon V in rectifier, and often organize rectifying device and be equipped with a sensor TA collection current signal, DC speed regulator A can realize control and scheduling co-design according to each silicon controlled electric current, enhance the security of testing equipment, reliability, improve the serviceable life of testing equipment;
(4) the utility model adopts the electric current in shunt P1 acquisition test loop in test specimen test loop, and shunt can be changed according to the size of test loop prospective current;
(5) the adjustable resistor Rx in the utility model have employed Large Copacity, high-precision resistor, thus ensure that the precision of Current adjustment;
The utility model can carry out detection experiment for the electrical equipment of 2-4KV electric pressure, by the application of DC speed regulator A and silicon-controlled device rectifier D, make the voltage-regulation of electrical apparatus test more quick, convenient, expand voltage regulation limits, extend the serviceable life of testing equipment.
Accompanying drawing explanation
Fig. 1 is system schematic of the present utility model;
Fig. 2 is the circuit theory diagrams of rectifier D in Fig. 1;
In figure: T1, rectifier transformer, QF1, harmonics isolating switch, T2, first AC current sensor, T3, second AC current sensor, T4, 3rd AC current sensor, T5, 4th AC current sensor, B1, alternating current measurement processor, U, voltage dependent resistor (VDR), D, rectifier, T6, first control transformer, T7, second control transformer, KM2, A.C. contactor, B2, alternating voltage synchronous acquisition processor, B3, potential regulator, Z1, I/O converter, B4, first point of pressing plate, B5, second point of pressing plate, S1, DC voltage indicator, S2, DC current indicator, Z2, computer interface, J1, power interface, B6, pulse amplifier, QF2, accompany test product DC circuit breaker, KM1, accompany test product D.C. contactor, Rx, adjustable resistor, Lx, adjustable reactance device, P1, shunt, A, DC speed regulator, F1, first fuse, F2, second fuse, F3, 3rd fuse, F4, 4th fuse, X1, test specimen, V, controllable silicon, G, controllable silicon gate pole, TA, sensor, FU, fastp-acting fuse.
Embodiment
Below in conjunction with accompanying drawing, the utility model and implementation process thereof are described in further detail.
As Fig. 1, a kind of high-capacity direct current electrical apparatus test device shown in Fig. 2, it comprises rectifier transformer T1, rectifier D, accompany test product circuit breaker Q F2, accompany test product contactor KM1, test specimen X1, rectifier transformer T1 is connected on power source bus, and rectifier transformer T1 is connected with one end of harmonics circuit breaker Q F1, the other end and the first D.C mutual-inductor T2 be arranged on power source bus L1 of harmonics circuit breaker Q F1, second D.C mutual-inductor T3, 3rd D.C mutual-inductor T4, the input end of the 4th D.C mutual-inductor T5 is connected, the first D.C mutual-inductor T2, second D.C mutual-inductor T3, 3rd D.C mutual-inductor T4, the output terminal of the 4th D.C mutual-inductor T5 is connected with the input end of alternating current measurement processor B1, and the output terminal of alternating current measurement processor B1 is connected with DC speed regulator A, by the first D.C mutual-inductor T2, second D.C mutual-inductor T3, 3rd D.C mutual-inductor T4, ac supply signal on the power source bus L1 collected is transferred to DC speed regulator A by the 4th D.C mutual-inductor T5, is realized the monitoring of AC power by DC speed regulator A,
The other end of harmonics circuit breaker Q F1 is also connected with another road power source bus L2, power source bus L2 is respectively equipped with the first fuse F1, second fuse F2, 3rd fuse F3, 4th fuse F4, second fuse F2 is connected with the input end of the second control transformer T7 by A.C. contactor KM2, the output terminal of the second control transformer T7 is connected with the input end of alternating voltage synchronous acquisition processor B 2, 3rd fuse F3 is connected with the input end of alternating voltage synchronous acquisition processor B 2 by A.C. contactor KM2, 4th fuse F4 is connected with the input end of the first control transformer T6, the output terminal of the first control transformer T6 is connected with the input end of alternating voltage synchronous acquisition processor B 2 by A.C. contactor KM2, the output terminal of alternating voltage synchronous acquisition processor B 2 is connected with the input end of first point of pressing plate B4, the output terminal of first point of pressing plate B4 is connected with DC speed regulator A, synchronous acquisition and the detection of ac voltage signal are input to alternating voltage synchronous acquisition processor B 2 by the first control transformer T6, the second control transformer T7 after A.C. contactor KM2 controls, through alternating voltage synchronous acquisition processor B 2 acquisition process, then by inputing to DC speed regulator A after first point of pressing plate B4 voltage division processing,
A.C. contactor KM2 is connected with the input end of I/O converter Z1, the output terminal of I/O converter Z1 is connected with the input end of DC speed regulator A, the output terminal of the first control transformer T6 is also connected with the alternating voltage test side of DC speed regulator A, the input end of DC speed regulator A is also connected with potential regulator B3, and DC speed regulator A is connected with remote computer by computer interface Z2; The output terminal of DC speed regulator A is connected with the input end of pulse amplifier B6, and the silicon controlled gate pole that the output terminal of pulse amplifier B6 is corresponding with rectifier D is connected; After potential regulator B3 or remote computer Long-distance Control regulate the voltage signal of DC speed regulator A, pulse signal is sent by DC speed regulator A, pulse signal is transferred to controllable silicon gate pole corresponding in rectifier D after pulse amplifier B6 amplifies, and realizes the control exporting DC voltage size;
Rectifier D is connected on power source bus L1, the DC output end of rectifier D by be in parallel accompany test product DC circuit breaker QF2, accompany test product D.C. contactor KM1 and adjustable resistor Rx, adjustable reactance device Lx, shunt P, test specimen X1 be in series, composition test specimen test loop, adjustable resistor Rx, adjustable reactance device Lx are used for adjusting the size of electric current in described test specimen test loop, and shunt P1 is used for gathering the electric current stated in test specimen test loop;
Test specimen test loop is parallel with second point of pressing plate B5, second point of pressing plate B5 is connected with DC speed regulator A, by the Voltage Feedback of test specimen test loop to DC speed regulator A.
Power source bus L1 is parallel with voltage dependent resistor (VDR) U at the input end of rectifier D, realizes the overvoltage protection of circuit.
Rectifier D adopts controllable silicon V as rectifying device, and each controllable silicon V and sensor TA, the fastp-acting fuse FU composition one group of rectification that is in series is combined, and sensor TA all can detect the electric current on each road.
DC speed regulator A is provided with voltage indicating gauge S1, electric current indicating gauge S2, in order to show DC voltage value in test specimen test loop and DC current values.
DC speed regulator A is also provided with power interface J1, for DC speed regulator A provides the AC power needed for self-operating.
In the utility model, DC speed regulator A adopts model to be the DC speed regulator of 6RA70.
Start before DC current in test, regulate the size of adjustable resistor Rx, adjustable reactance device Lx according to the output voltage of rectifier transformer T1, prospective current, access test specimen X1, to rectifier transformer T1 indirect current, closed harmonics circuit breaker Q F1; DC speed regulator A is regulated again according to target voltage, voltage is adjusted to starting characteristics test after desired value, by accompanying test product DC circuit breaker QF2 or accompanying that test product D.C. contactor KM1 and test specimen X1's coordinated test, shunt P1 completes the collection of test specimen test loop current signal.
When test specimen X1 is control apparatus, accompany test product to select DC circuit breaker QF2, when test specimen X1 is electrical power distribution apparatus, accompany test product to select D.C. contactor KM1.
Harmonics circuit breaker Q F1, accompany test product DC circuit breaker QF2, accompany test product D.C. contactor KM1, test specimen X1 all can realize the sequential control of electrical apparatus test.
Claims (5)
1. a high-capacity direct current electrical apparatus test device, it comprises rectifier transformer (T1), rectifier (D), accompany test product isolating switch (QF2), accompany test product contactor (KM1), test specimen (X1), it is characterized in that: described rectifier transformer (T1) is connected on power source bus, described rectifier transformer (T1) is connected with one end of harmonics isolating switch (QF1), the other end and first D.C mutual-inductor (T2) be arranged on power source bus L1 of described harmonics isolating switch (QF1), second D.C mutual-inductor (T3), 3rd D.C mutual-inductor (T4), the input end of the 4th D.C mutual-inductor (T5) is connected, described first D.C mutual-inductor (T2), second D.C mutual-inductor (T3), 3rd D.C mutual-inductor (T4), the output terminal of the 4th D.C mutual-inductor (T5) is connected with the input end of alternating current measurement processor (B1), and the output terminal of described alternating current measurement processor (B1) is connected with DC speed regulator (A), by the first D.C mutual-inductor (T2), second D.C mutual-inductor (T3), 3rd D.C mutual-inductor (T4), ac supply signal on the power source bus L1 collected is transferred to described DC speed regulator (A) by the 5th D.C mutual-inductor (T5), is realized the monitoring of AC power by DC speed regulator (A),
The other end of described harmonics isolating switch (QF1) is also connected with another road power source bus L2, described power source bus L2 is respectively equipped with the first fuse (F1), second fuse (F2), 3rd fuse (F3), 4th fuse (F4), described second fuse (F2) is connected by the input end of A.C. contactor (KM2) with the second control transformer (T7), the output terminal of the second control transformer (T7) is connected with the input end of alternating voltage synchronous acquisition processor (B2), described 3rd fuse (F3) is connected by the input end of A.C. contactor (KM2) with described alternating voltage synchronous acquisition processor (B2), described 4th fuse (F4) is connected with the input end of the first control transformer (T6), the output terminal of described first control transformer (T6) is connected by the input end of A.C. contactor (KM2) with described alternating voltage synchronous acquisition processor (B2), the output terminal of described alternating voltage synchronous acquisition processor (B2) is connected with the input end of first point of pressing plate (B4), the output terminal of described first point of pressing plate (B4) is connected with described DC speed regulator (A), the synchronous acquisition of ac voltage signal and detection are input to described alternating voltage synchronous acquisition processor (B2) by described first control transformer (T6), described second control transformer (T7) after described A.C. contactor (KM2) controls, after described alternating voltage synchronous acquisition processor (B2) acquisition process, then input to described DC speed regulator (A) by after first point of pressing plate (B4) voltage division processing,
Described A.C. contactor (KM2) is connected with the input end of I/O converter (Z1), the output terminal of described I/O converter (Z1) is connected with the input end of described DC speed regulator (A), the output terminal of described first control transformer (T6) is also connected with the alternating voltage test side of described DC speed regulator (A), the input end of described DC speed regulator (A) is also connected with potential regulator (B3), and described DC speed regulator (A) is connected with remote computer by computer interface (Z2); The output terminal of described DC speed regulator (A) is connected with the input end of pulse amplifier (B6), and the silicon controlled gate pole that the output terminal of described pulse amplifier (B6) is corresponding with described rectifier (D) is connected; After described potential regulator (B3) or remote computer Long-distance Control regulate the voltage signal of described DC speed regulator (A), pulse signal is sent by described DC speed regulator (A), pulse signal is transferred to controllable silicon gate pole corresponding in described rectifier (D) after described pulse amplifier (B6) amplifies, and realizes the control exporting DC voltage size;
Described rectifier (D) is connected on described power source bus L1, the DC output end of described rectifier (D) accompanies test product DC circuit breaker (QF2) by what be in parallel, accompany test product D.C. contactor (KM1) and adjustable resistor (Rx), adjustable reactance device (Lx), shunt (P), test specimen (X1) is in series, composition test specimen test loop, described adjustable resistor (Rx), described adjustable reactance device (Lx) is used for adjusting the size of electric current in described test specimen test loop, described shunt (P1) is used for gathering the electric current stated in test specimen test loop,
Described test specimen test loop is parallel with second point of pressing plate (B5), described second point of pressing plate (B5) is connected with described DC speed regulator (A), by the Voltage Feedback of described test specimen test loop to described DC speed regulator.
2. high-capacity direct current electrical apparatus test device according to claim 1, is characterized in that: described power source bus L1 is parallel with voltage dependent resistor (VDR) (U) at the input end of described rectifier (D), realizes the overvoltage protection of circuit.
3. high-capacity direct current electrical apparatus test device according to claim 1, it is characterized in that: described rectifier (D) adopts controllable silicon (V) as rectifying device, the composition one group of rectification that is in series of each controllable silicon (V) and sensor (TA), fastp-acting fuse (FU) is combined, and sensor (TA) all can detect the electric current on each road.
4. high-capacity direct current electrical apparatus test device according to claim 1, it is characterized in that: described DC speed regulator (A) is provided with voltage indicating gauge (S1), electric current indicating gauge (S2), in order to show DC voltage value in described test specimen test loop and DC current values.
5. high-capacity direct current electrical apparatus test device according to claim 1, is characterized in that: described DC speed regulator (A) is also provided with power interface (J1), for described DC speed regulator (A) provides the AC power needed for self-operating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420669719.XU CN204154835U (en) | 2014-11-11 | 2014-11-11 | High-capacity direct current electrical apparatus test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420669719.XU CN204154835U (en) | 2014-11-11 | 2014-11-11 | High-capacity direct current electrical apparatus test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204154835U true CN204154835U (en) | 2015-02-11 |
Family
ID=52512937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420669719.XU Expired - Fee Related CN204154835U (en) | 2014-11-11 | 2014-11-11 | High-capacity direct current electrical apparatus test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204154835U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316805A (en) * | 2014-11-11 | 2015-01-28 | 甘肃电器科学研究院 | Testing device for high-capacity direct-current electric appliance |
-
2014
- 2014-11-11 CN CN201420669719.XU patent/CN204154835U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316805A (en) * | 2014-11-11 | 2015-01-28 | 甘肃电器科学研究院 | Testing device for high-capacity direct-current electric appliance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203037769U (en) | Wind power and photovoltaic grid-connected testing platform | |
| CN204205599U (en) | A kind of electronic type feeder line on-load voltage regulating device | |
| CN102570474B (en) | Triggering and conducting method used for switching of capacitor of thyristor AC non-contact switch | |
| CN102611377B (en) | Magnetic valve type controllable reactor control system and control method | |
| CN105391087A (en) | Intelligent energy-saving system applied to photovoltaic power station | |
| CN204154835U (en) | High-capacity direct current electrical apparatus test device | |
| CN103427676A (en) | Three-phase reactance power-saving device | |
| CN204144950U (en) | A kind of compensation program control circuit on-load voltage regulation system | |
| CN104316805A (en) | Testing device for high-capacity direct-current electric appliance | |
| CN104348179A (en) | Control method for light direct current transmission system | |
| CN102315615A (en) | Vehicular DC (Direct Current) ice melting device and protection method thereof | |
| CN104300573A (en) | Small and micro hydroelectric generating set and comprehensive control device thereof | |
| CN104659897A (en) | Photovoltaic grid-connected power supply system used for sport clubhouse | |
| CN204613387U (en) | For the electric supply installation that current transformer detects | |
| CN114397517A (en) | Photovoltaic inverter test system | |
| CN204142783U (en) | A kind of device of experiment power supply of alternating current-direct current pollution test | |
| CN202633876U (en) | Equivalent 24-pulse-wave uncontrolled rectifying direct-current ice melting device | |
| CN102545223A (en) | High-voltage dynamic filtering power-saving device for mine | |
| CN207573068U (en) | A kind of circuit resistance tester supplies electric installation | |
| Zhe et al. | Study on reactive automatic compensation system design | |
| CN204258298U (en) | A kind of low-pressure energy-saving stable-pressure device | |
| CN202856436U (en) | Standby direct current power source for small rural hydropower station | |
| CN203645573U (en) | Current disturbance generating system | |
| CN204230926U (en) | A kind of power cell control system of HVDC light system | |
| CN204089222U (en) | A kind of small hydropower station generator excitation regulating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20150211 Termination date: 20161111 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |