CN218602992U - Mobile maintenance and power protection integrated device - Google Patents
Mobile maintenance and power protection integrated device Download PDFInfo
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- CN218602992U CN218602992U CN202222530208.7U CN202222530208U CN218602992U CN 218602992 U CN218602992 U CN 218602992U CN 202222530208 U CN202222530208 U CN 202222530208U CN 218602992 U CN218602992 U CN 218602992U
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Abstract
The utility model discloses a movable type maintenance and electricity protection integrated device, which comprises a box body, a main control unit, a first switch, a first breaker, a third breaker and a second switch, wherein the main control unit, the first switch, the first breaker, the third breaker and the second switch are arranged in the box body; the output ends of the first switch and the second switch are connected with a load through a third circuit breaker; the main control unit is connected with the control ends of the first switch, the second switch, the first circuit breaker and the third circuit breaker; the main control unit is respectively connected with the first switch, the second switch and the sensor at the input end of the third circuit breaker; the lower end of the box body is provided with universal wheels. Under the condition of disconnecting the first circuit breaker and the third circuit breaker, the second power supply is used as a working power supply, the performance of the first switch and the second switch and the monitoring data of the sensor are subjected to self-checking, and the reliability of switching a power grid is improved; through the structure of universal wheel and box, it is portable to realize the box.
Description
Technical Field
The utility model relates to a power grid switches technical field, concretely relates to portable maintenance and guarantor's electric integrated device.
Background
With the development of economic society and the improvement of living standards of people, the requirements of power consumers on the continuity and reliability of a power supply system are higher and higher, particularly, important activities and important meeting venues have more urgent requirements on continuous power supply, are very sensitive to power failure, even short-time power failure and insufficient power supply, and the social influence caused by insufficient power supply during the peak period of power utilization is highly paid attention to power supply enterprises for a long time.
The power supply is insufficient, voltage is reduced, related loads cannot work normally, even equipment of the loads is damaged, normal production of enterprises is seriously affected, and inconvenience is brought to people's life. Important activities, important meeting venues are sensitive to the need for optimization of electricity.
And the frequency of the work such as load capacity expansion, power protection maintenance and the like in important places is low, so that a movable maintenance and power protection integrated device needs to be designed.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem who exists among the prior art, the utility model provides a portable maintenance and guarantor's electric integrated device conveniently removes and self-checking.
The utility model discloses a movable type overhaul and power protection integrated device, which comprises a box body, a main control unit, a first switch, a first breaker, a third breaker and a second switch, wherein the main control unit, the first switch, the first breaker, the third breaker and the second switch are arranged in the box body; the output ends of the first switch K1 and the second switch K2 are connected with a load through a third circuit breaker M3; the main control unit C is connected with the control ends of the first switch K1, the second switch K2, the first circuit breaker and the third circuit breaker; the main control unit C is respectively connected with the first switch K1, the second switch K2 and the sensor at the input end of the third circuit breaker; the lower end of the box body is provided with universal wheels.
Preferably, the first power supply is electrically connected with the load through a third switch QF;
the first circuit breaker M1 is connected with the input end of a third switch QF through a first grid-connected switch QF1, and the third circuit breaker M3 is connected with the input end of a load through a second grid-connected switch QF 2;
the first power supply is connected with the third switch QF through an isolating switch QS.
Preferably, the first switch and the second switch adopt a direct current excitation driving loop,
the first power line of the direct current excitation driving circuit is connected with the anode of the first rectifying diode group, the cathode of the first rectifying diode group is connected with the anode of the first capacitor group through the first metal oxide semiconductor field effect transistor,
the first power line is connected with the cathode of the second rectifying diode group, the anode of the second rectifying diode group is connected with the cathode of the second capacitor group through the second metal oxide semiconductor field effect transistor,
the negative electrode of the first capacitor bank and the positive electrode of the second capacitor bank are connected with a second power line;
and the anode of the first capacitor bank and the cathode of the second power pack are connected with an excitation discharge loop.
Preferably, the alternating-current voltage of the first power supply line and the alternating-current voltage of the second power supply line are 380V, and the direct-current voltage of the anode of the first capacitor bank and the direct-current voltage of the cathode of the second capacitor bank are 750V;
the first capacitor bank comprises a plurality of capacitors connected in parallel; the second capacitor group comprises a plurality of capacitors connected in parallel;
the first rectifying diode group or the second rectifying diode group comprises two groups of third rectifying secondary tube groups connected in parallel, and each third rectifying secondary tube group comprises two rectifying diodes connected in series.
Preferably, the box body comprises a main box body and a control box arranged on the upper side of the main box body, the control box is provided with an alarm, the front end of the control box is provided with a touch screen, and the universal wheel is arranged at the lower end of the main box body;
one side of the main box body is provided with a plurality of groups of sockets, and the other side of the main box body is provided with a 220V emergency socket;
and a hanging ring is arranged at the upper end of the control box.
Preferably, the first power source comprises mains electricity and the second power source comprises a generator car or a generator.
Preferably, the first circuit breaker and the third circuit breaker are molded case circuit breakers, and the first switch and the second switch are transfer switches.
Preferably, the chip type of the main control unit is: STM32F429IGT or STM32F429LX; the sensor includes a voltage sensor and/or a current sensor.
Compared with the prior art, the beneficial effects of the utility model are that: under the condition of disconnecting the first circuit breaker M1 and the third circuit breaker M3, the second power supply is used as a working power supply, the performance of the first switch and the second switch and the monitoring data of the sensor are subjected to self-checking, and the reliability of the switching power grid of the utility model is improved; through the structure of universal wheel and box, it is portable to realize the box.
Drawings
FIG. 1 is a circuit diagram of the mobile maintenance and power protection integrated device of the present invention;
FIG. 2 is a right side view of the case;
FIG. 3 is a front view of the case;
FIG. 4 is a left side view of the case;
FIG. 5 is a circuit diagram of a DC excitation drive circuit;
fig. 6 is a circuit diagram of an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The invention is described in further detail below with reference to the accompanying drawings:
a movable type maintenance and power protection integrated device is shown in figures 1-4 and comprises a box body 1, a main control unit C, a first switch K1, a first circuit breaker M1, a third circuit breaker M3 and a second switch K2, wherein the main control unit C, the first switch K1, the third circuit breaker M3 and the second switch K2 are arranged in the box body 1; the output ends of the first switch K1 and the second switch K2 are connected with a load through a third circuit breaker M3; the main control unit C is connected with the control ends of the first switch K1, the second switch K2, the first circuit breaker and the third circuit breaker; the main control unit C is respectively connected with the first switch K1, the second switch K2 and the sensor at the input end of the third breaker; the lower end of the box body 1 is provided with a universal wheel 11.
Under the condition of disconnecting the first circuit breaker M1 and the third circuit breaker M3, the second power supply is used as a working power supply, the performance of the first switch and the second switch and the monitoring data of the sensor are subjected to self-checking, and the reliability of the switching power grid of the utility model is improved; through the structure of universal wheel and box, realize portable and use as required, avoid for in every block terminal or the distribution network, dispose maintenance and guarantor's electric integrated device, reduce cost.
In a self-test operation: the first breaker M1, the third breaker M3, the first switch K1 and the second switch K2 are disconnected, and a second power supply provides detection voltage/working voltage; acquiring second signal data of a second power supply; sending a first closing instruction to a second switch through a main control unit to obtain second closing time of the second switch; sending a second switching-on instruction to the first switch through the main control unit to obtain first switching-on time of the first switch; the performance of the first switch and the second switch is checked. When a fault occurs or the closing time exceeds a preset value, an alarm is given out through the alarm, and the grid connection reliability is improved.
In one overhaul operation: after the first breaker M1, the third breaker M3 and the first switch K1 are closed, the third switch QF of the original power grid is disconnected, and the two ends of the third switch are respectively connected with the first power supply and the load, so that the bypass of the first switch K1 supplies power to the load; the main control unit analyzes the collected first signal data of the first power supply and the collected second signal data of the second power supply, and if the two are in the same period or quasi-same period, the second switch K2 is switched on to carry out grid connection of the second power supply; after the first switch K1 is disconnected, the original distribution network can be overhauled.
The third switch QF is a component of the original distribution network and needs to be manually turned off. But also can be connected with the control end of the third switch QF through the main control unit of the utility model, realizing automatic closing.
Synchronous or quasi-synchronous grid connection is the prior art. In one embodiment, the average of the sum of the phase slips is calculated using the following formula:
NR i ＝N i -R i (1)
Avg＝Th/(n×cyc) (3)
wherein NR is i Expressed as phase difference, th as sum of phase slip, N i The ith value expressed as the first phase、R i Expressed as the ith value of the second phase, n is the total number of values in the window, avg is the average of the sum of the phase slips, cyc is the number of cycles calculated. If only the data in the current cycle is calculated, cyc is 1.
And if the average value Avg of the phase sliding sum does not exceed a first threshold value, switching on the second switch to carry out grid connection. For example no more than 4 points.
In a test, the angular difference of the moment of the closing point is-1, namely-1.5 degrees, and the waveforms of the first signal data and the second signal data are basically overlapped during grid connection, so that the load flow impact at the grid connection moment is greatly reduced, and the requirement of grid connection is met.
The first switch, the second switch, the first circuit breaker and the third circuit breaker can adopt a direct current excitation driving circuit, as shown IN fig. 5, a first power line UA _ IN is connected with the anode of a first rectifying diode group (D3-D6), the cathode of the first rectifying diode group is connected with the anode of a first capacitor group (C22-C25) through a first metal oxide semiconductor field effect transistor Q1 (MOS transistor), the first power line UA _ IN is connected with the cathode of a second rectifying diode group (D7-D10), the anode of the second rectifying diode group is connected with the cathode of a second capacitor group (C28-C31) through a second metal oxide semiconductor field effect transistor Q2, and the cathode of the first capacitor group and the anode of the second capacitor group are connected with a second power line UB _ IN; the positive pole of the first capacitor bank is used as a direct current positive pole DC +, and the negative pole of the second power pack is used as a direct current negative pole DC-and is connected with the excitation discharge circuit. IN a specific embodiment, the alternating voltage between UA _ IN and UA _ B is 380V, and the direct voltage between DC + and DC-is 750V, so that the stability of the switch driving time can be stabilized through the direct current excitation driving loop, and the measured result is more accurate. In one particular test, the closing time of the switch was 25-36ms.
The alternating current voltage of the first power supply line UA _ IN and the second power supply line UB _ IN is 380V, and the direct current voltage of the anode of the first capacitor bank and the direct current voltage of the cathode of the second power supply bank are 750V; the first capacitor group comprises a plurality of capacitors connected in parallel; the second capacitor group comprises a plurality of capacitors connected in parallel; the first rectifying diode group or the second rectifying diode group comprises two groups of third rectifying diode groups connected in parallel, and each third rectifying diode group comprises two rectifying diodes connected in series.
The chip model of the main control unit is as follows: STM32F429IGT or STM32F429LX, but not limited thereto; the sensor includes a voltage sensor and/or a current sensor.
2-4 show the arrangement of the box, the box 1 includes the main box 18 and the control box 17 set up on the main box 18 upside, there are sirens 12 on the control box 17, the front end is provided with touch screen 13 and control button 14, the universal wheel 11 is set up in the lower extreme of the main box 18, the upper end of the said control box can also be provided with the hanging ring (not shown in the figure), facilitate to hold in the palm and carry. One side of the box body 1 is provided with a 220V emergency socket 15.
Examples
As shown in fig. 6, the first power source is electrically connected to a load through an isolating switch QS and a third switch QF; the first circuit breaker M1 is connected with the input end of the third switch QF through the first grid-connected switch QF1, and the third circuit breaker M3 is connected with the input end of the load through the second grid-connected switch QF 2.
The first grid-connected switch QF1 is connected with a first quick interface S1, and the first quick interface S1 is connected with a second quick interface S2 through a cable; the output end of the third switch QF is connected with a second grid-connected switch QF2 and a load, the second grid-connected switch QF2 is connected with a fifth quick interface S5, the fifth quick interface S5 is connected with a fourth quick interface S4 through a cable, and the fourth quick interface S4 is connected with a third circuit breaker M3; the second switch is connected to a second power supply G via a second circuit breaker M2 and a third fast interface S3.
Under the condition that can arrange quick interface equally in the former distribution network, it is convenient the utility model discloses an overhaul and protect electric integrated device's high-speed joint.
The first power supply comprises commercial power, and the second power supply comprises a generator car or a generator. The first circuit breaker and the third circuit breaker are molded case circuit breakers, and the first switch and the second switch are change-over switches.
The maintenance and power protection integrated device of the embodiment also performs a functional test: the method comprises a bypass low-voltage air switch (first switch K1) test, a synchronous grid connection detection switch to generator test, a synchronous grid connection detection return mains supply test, a fault protection test, a state indication test and a 48-hour continuous operation examination test, wherein the test results are in accordance according to the standards of BG/T7261-2016 19, GB/T3797-2016 7.12 and GB/T14048.11-2016 8.2.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A movable maintenance and electricity protection integrated device is characterized by comprising a box body, a main control unit, a first switch, a first breaker, a third breaker and a second switch which are arranged in the box body,
the first switch is connected with a first power supply through a first breaker, and the second switch is connected with a second power supply; the output ends of the first switch and the second switch are connected with a load through a third circuit breaker; the main control unit is connected with the control ends of the first switch, the second switch, the first circuit breaker and the third circuit breaker; the main control unit is respectively connected with the sensors at the input ends of the first switch, the second switch and the third circuit breaker;
the lower end of the box body is provided with universal wheels.
2. The mobile integrated service and power conservation device of claim 1 wherein the first power source is electrically connected to the load through a third switch;
the first circuit breaker is connected with the input end of a third switch through a first grid-connected switch, and the third circuit breaker is connected with the input end of a load through a second grid-connected switch;
the first power supply is connected with the third switch through the isolating switch.
3. The mobile integrated overhaul and power conservation device of claim 1, wherein the first switch and the second switch are DC-energized to drive the circuit,
the first power line of the direct current excitation driving circuit is connected with the anode of the first rectifying diode group, the cathode of the first rectifying diode group is connected with the anode of the first capacitor group through the first metal oxide semiconductor field effect transistor,
the first power line is connected with the cathode of the second rectifying diode group, the anode of the second rectifying diode group is connected with the cathode of the second capacitor group through the second metal oxide semiconductor field effect transistor,
the negative electrode of the first capacitor bank and the positive electrode of the second capacitor bank are connected with a second power line;
and the anode of the first capacitor bank and the cathode of the second power pack are connected with an excitation discharge loop.
4. The integrated mobile service and power conservation device of claim 3 wherein the first and second power lines have an AC voltage of 380V and the positive pole of the first capacitor bank and the negative pole of the second power bank have a DC voltage of 750V;
the first capacitor bank comprises a plurality of capacitors connected in parallel; the second capacitor group comprises a plurality of capacitors connected in parallel;
the first rectifying diode group or the second rectifying diode group comprises two groups of third rectifying diode groups connected in parallel, and each third rectifying diode group comprises two rectifying diodes connected in series.
5. The mobile maintenance and power protection integrated device according to claim 1, wherein the box body comprises a main box body and a control box arranged on the upper side of the main box body, an alarm is arranged on the control box, a touch screen is arranged at the front end of the control box, and universal wheels are arranged at the lower end of the main box body;
one side of the main box body is provided with a plurality of groups of sockets, and the other side of the main box body is provided with a 220V emergency socket;
and a lifting ring is arranged at the upper end of the control box.
6. The integrated mobile service and power conservation device of claim 1 wherein the first power source comprises utility power and the second power source comprises a generator car or a generator.
7. The mobile integrated service and power conservation device of claim 1 wherein the first and third circuit breakers are molded case circuit breakers and the first and second switches are transfer switches.
8. The mobile integrated overhaul and power conservation device of claim 1, wherein the master control unit has a chip model of: STM32F429IGT or STM32F429LX;
the sensor includes a voltage sensor and/or a current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222530208.7U CN218602992U (en) | 2022-09-23 | 2022-09-23 | Mobile maintenance and power protection integrated device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222530208.7U CN218602992U (en) | 2022-09-23 | 2022-09-23 | Mobile maintenance and power protection integrated device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218602992U true CN218602992U (en) | 2023-03-10 |
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ID=85399891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222530208.7U Active CN218602992U (en) | 2022-09-23 | 2022-09-23 | Mobile maintenance and power protection integrated device |
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|---|---|
| CN (1) | CN218602992U (en) |
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- 2022-09-23 CN CN202222530208.7U patent/CN218602992U/en active Active
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