CN221103024U - Auxiliary source power taking circuit and control system of intelligent power distribution cabinet - Google Patents
Auxiliary source power taking circuit and control system of intelligent power distribution cabinet Download PDFInfo
- Publication number
- CN221103024U CN221103024U CN202322875669.2U CN202322875669U CN221103024U CN 221103024 U CN221103024 U CN 221103024U CN 202322875669 U CN202322875669 U CN 202322875669U CN 221103024 U CN221103024 U CN 221103024U
- Authority
- CN
- China
- Prior art keywords
- power supply
- power
- relay
- circuit
- auxiliary
- 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.)
- Active
Links
- 239000004065 semiconductor Substances 0.000 claims description 20
- 238000000605 extraction Methods 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000005669 field effect Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 21
- 238000004804 winding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Landscapes
- Stand-By Power Supply Arrangements (AREA)
Abstract
The application discloses an auxiliary source power taking circuit and a control system of an intelligent power distribution cabinet, wherein the auxiliary source power taking circuit comprises a first power supply end, a second power supply end, a first contactor, a first relay, a control unit and an auxiliary power supply, the first power supply end is connected with a power grid, and the second power supply end is connected with an inverter; the first power supply end is connected with the second power supply end, the auxiliary power supply and the user load respectively through a normally-open contact of the first contactor, and the first power supply end is also connected with a coil of the first contactor through a normally-closed contact of the first relay; the auxiliary power supply is also connected with the control unit, and the control unit is used for controlling the on-off of the normally closed contact of the first relay. In the auxiliary source power-taking circuit, the auxiliary power source can take power from any power supply end, and the auxiliary source power-taking circuit is simple to control, high in reliability and low in cost.
Description
Technical Field
The application relates to the technical field of intelligent power distribution cabinets, in particular to an auxiliary source power taking circuit and a control system of an intelligent power distribution cabinet.
Background
With the popularization of photovoltaic power generation and the development of energy storage technology, household energy storage products are also increasingly favored by consumers. The power sources for the users are also diversified, and the power sources include power grids, photovoltaics, batteries, oil engines and the like. How to reasonably distribute the energy sources, so that the energy sources can continuously provide continuous power for residents, an intelligent power distribution cabinet is needed to serve as an energy source router, and the router is provided with a power grid, a photovoltaic battery and an oil engine, and any end of the oil engine has power to provide power for the residents. Because the intelligent power distribution cabinet is internally provided with a control circuit, the design of the auxiliary power supply is to take electricity from multiple ports, and the auxiliary power supply can work when any power supply end has electricity. Therefore, more requirements are added to the auxiliary power supply, for example, the power taking of each port meets the EMC and surge requirements, so that the power supply cost is increased, and the failure risk is also increased.
At present, the power taking scheme for multiple power supply ports generally has a plurality of ports for supplying power, and an internal auxiliary power supply takes power from the rear stage of the breaker with a plurality of ports. Thus, EMC filtering and protecting circuits of each power taking port are added. And then, a plurality of primary windings are added on an auxiliary source transformer to realize one-path auxiliary power supply work. However, only one primary winding participates in the operation of the transformer at a time, so that a complex interlocking relationship exists in the control circuits among the multiple primary windings, and each primary winding needs to be provided with a set of independent control circuits and a main switching tube, so that the circuit is complex in form and high in cost.
Therefore, it is desirable to provide an auxiliary source power circuit and a control system for an intelligent power distribution cabinet to solve the above problems.
Disclosure of utility model
The application aims to provide an auxiliary source power taking circuit and a control system of an intelligent power distribution cabinet, wherein an auxiliary power source can take electricity at any power supply end, and the auxiliary source power taking circuit is simple in control, high in reliability and low in cost.
The application adopts the following technical scheme:
In a first aspect, the application provides an auxiliary source power taking circuit of an intelligent power distribution cabinet, which comprises a first power supply end, a second power supply end, a first contactor, a first relay, a control unit and an auxiliary power supply, wherein the first power supply end is connected with a power grid, the second power supply end is connected with an inverter, the first contactor is used for controlling on-off of the circuit, and the first relay is used for controlling conversion and isolation of signals;
The first power supply end is connected with the second power supply end, the auxiliary power supply and the user load through the contact of the first contactor, and the first power supply end is also connected with the coil of the first contactor through the contact of the first relay;
the auxiliary power supply is also connected with the control unit, and the control unit is used for controlling the on-off of the contact of the first relay.
In one embodiment of the application, the auxiliary source power taking circuit further comprises a first circuit breaker, the first power supply end is connected to a power grid through the first circuit breaker, the first circuit breaker is used for breaking a current path in the circuit, and a contact of the first relay is a normally closed contact.
In one embodiment of the application, the auxiliary source power taking circuit further comprises a third power supply end, a second contactor and a second relay, wherein the second contactor is used for controlling the on-off of the circuit, and the second relay is used for controlling the conversion and isolation of signals;
The third power supply end is connected with the second power supply end, the auxiliary power supply and the user load through the contact of the second contactor respectively, and is also connected with the coil of the second contactor through the contact of the second relay;
the control unit is also used for controlling the on-off of the contact of the second relay.
In one embodiment of the present application, the auxiliary source power extraction circuit further includes a third relay;
The coil of the second contactor is connected with the second power supply end through the contact of the third relay;
the control unit is also used for controlling the on-off of the contact of the third relay.
In one embodiment of the application, the auxiliary source power taking circuit further comprises a second circuit breaker, the third power supply end is connected with the oil engine or the intelligent load through the second circuit breaker, the second circuit breaker is used for breaking a current path in the circuit, and a contact of the second relay is a normally closed contact.
In one embodiment of the application, the auxiliary source power extraction circuit further comprises a semiconductor switching tube, wherein the semiconductor switching tube is connected with the contact of the first relay in parallel;
And the control unit is used for controlling the semiconductor switching tube to be conducted and controlling the contact of the first relay to be disconnected when the auxiliary power supply is electrified.
In one embodiment of the present application, the semiconductor switching tube adopts any one of the following: power diodes, field effect transistors, bipolar junction transistors, insulated gate bipolar transistors, and thyristors.
The application also provides a control system of the intelligent power distribution cabinet, which comprises any auxiliary source power taking circuit, a power grid and an inverter.
In one embodiment of the application, the control system further comprises an oil engine or a smart load;
And a third power supply end of the auxiliary source power taking circuit is connected with the oil engine or the intelligent load.
In one embodiment of the application, a third power supply end of the auxiliary power supply circuit is connected with the intelligent load, and a control unit of the auxiliary power supply circuit controls a normally open contact of the third relay to be closed; or alternatively
The third power supply end of the auxiliary power supply circuit is connected with the oil engine, and the control unit of the auxiliary power supply circuit controls the normally open contact of the third relay to be disconnected.
Compared with the prior art, the technical scheme of the application has at least the following advantages:
According to the auxiliary source power taking circuit, the first relay is arranged, when the first power supply end is electrified, the coil of the first contactor is electrified, the contact of the first contactor is closed, the user load and the auxiliary power supply of the later stage are electrified, and normal work is started; when the first power supply end is powered off and the second power supply end is powered on, the user load and the auxiliary power supply take power from the second power supply end, and the power supply can work normally as well.
Drawings
In order that the application may be more readily understood, a more particular description of the application will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
Fig. 1 is a block diagram of an intelligent power distribution cabinet;
FIG. 2 is a schematic diagram of the connection of the auxiliary source power extraction circuit according to the preferred embodiment of the present application;
fig. 3 is a schematic diagram of partial connection of the auxiliary power supply circuit in the preferred embodiment of the present application.
Description of the specification reference numerals: KA1, a first contactor; KA2, a second contactor; k1, a normally closed contact of the first relay; k2, a normally closed contact of the second relay; k3, a normally open contact of the third relay; QF1, first circuit breaker; QF2, second circuit breaker; s1, a semiconductor switching tube.
Detailed Description
The present application will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the application and practice it.
In the following, first, one of the technical fields of the present application (i.e. the intelligent power distribution cabinet) will be briefly described with reference to the specific embodiments of the present application.
Referring to fig. 1, the power supply ports of the intelligent power distribution cabinet mainly comprise three power grids, an inverter and an oil engine, wherein the oil engine port can also be connected with an intelligent load, such as some high-power electrical appliances.
Based on the above, the application provides an auxiliary source power taking circuit and a control system of an intelligent power distribution cabinet, so as to solve the following technical problems: 1. how to make only one auxiliary power supply, the power can be taken from a plurality of power supply ends at will, and the control is simple, the reliability is high, and the cost is low; 2. how to quickly switch from the network to the parallel, and the household electricity is not interrupted; 3. after the failure of the auxiliary power supply or the control unit of the intelligent power distribution cabinet is guaranteed, a user can normally take electricity from the power grid, and the basic electricity consumption requirement of a family is met.
Example 1
Referring to fig. 2, the embodiment of the application discloses an auxiliary source power-taking circuit, which comprises a first power supply end, a second power supply end, a first contactor KA1, a first relay, a control unit and an auxiliary power supply; in this embodiment, the first power supply end is a power grid end, and the second power supply end is an inverter output end of a photovoltaic or battery.
The first power supply end is connected with the second power supply end, the auxiliary power supply and the user load through the contact of the first contactor KA1, and the first power supply end is also connected with the coil of the first contactor KA1 through the contact K1 of the first relay;
the auxiliary power supply is also connected with the control unit, and the control unit is used for controlling the on-off of the contact K1 of the first relay.
In this embodiment, the control function of the control unit may be implemented by MPU, MCU, DSP, FPGA or any combination thereof.
Auxiliary power supplies refer to power supplies used in electrical power systems to provide electrical power to support system operation, monitoring, protection, or perform specific functions. It is typically not the primary power source, but an additional power source for maintaining and managing the power system. Auxiliary power supplies typically employ backup power sources (e.g., batteries, diesel generators, solar cells, etc.) or uninterruptible power supply systems (UPS) to provide power. The main objective of the auxiliary power supply is to ensure the availability and stability of the power system, especially in case of failure of the main power supply or other emergency.
Contactors are mainly used for switching control of high current loads, and relays are used for switching and isolation of control signals, as well as performing various complicated control functions. Both are important components in electrical control systems for automation and circuit protection.
Circuit breakers are used to break paths of electrical current in electrical circuits to prevent circuit overload, short circuits, and other electrical faults from causing accidents.
According to the auxiliary source power taking circuit, the first relay is arranged, when the first power supply end is electrified, the coil of the first contactor KA1 is electrified, the contact of the first contactor KA1 is closed, the user load and the auxiliary power supply at the later stage are electrified, and normal work is started; when the first power supply end is powered off and the second power supply end is powered on, the user load and the auxiliary power supply take power from the second power supply end, and the power supply can work normally as well.
Further, the auxiliary source power taking circuit further comprises a first breaker QF1, the first power supply end is connected into a power grid through the first breaker QF1, and a contact K1 of the first relay is a normally closed contact.
In this embodiment, the second power supply terminal is connected to an inverter, and the inverter is connected to a photovoltaic module or an energy storage battery.
Through setting up first circuit breaker QF1, when the electric wire netting has electricity, close first circuit breaker QF1, because the contact K1 of the first relay on the control panel is normally closed contact, at this moment, the contact K1 of first relay is in closed state, and the coil of first contactor KA1 gets the electricity, and the contact of first contactor KA1 is closed, and the dc-to-ac converter port has electricity, and auxiliary power source gets the electricity and begins work. Circuit breakers can provide overload and short circuit protection functions, protecting electrical circuitry and electrical equipment from current overloads, short circuits, and other electrical faults.
Further, the auxiliary source power taking circuit further comprises a third power supply end, a second contactor KA2 and a second relay; the third power supply end can be an output end of the intelligent load of the oil engine.
The third power supply end is connected with the second power supply end, the auxiliary power supply and the user load through the contact of the second contactor KA2, and the third power supply end is also connected with the coil of the second contactor KA2 through the contact K2 of the second relay;
The control unit is also used for controlling the on-off of the contact K2 of the second relay.
By arranging the second relay, when the third power supply end is electrified, the coil of the second contactor KA2 is electrified, the contact of the second contactor KA2 is closed, and the user load and the auxiliary power supply of the later stage are electrified to start normal work; when the third power supply end is powered off and the second power supply end is powered on, the user load and the auxiliary power supply take power from the second power supply end, and the power supply can work normally.
Further, the auxiliary source power taking circuit further comprises a second breaker QF2, the third power supply end is connected with the oil engine through the second breaker QF2, and a contact K2 of the second relay is a normally closed contact.
Through setting up second circuit breaker QF2, when the oil engine has electricity, close second circuit breaker QF2, because the contact K2 of the second relay on the control panel is normally closed contact, at this moment, the contact K2 of second relay is in closed state, the coil of second contactor KA2 gets the electricity, the contact closure of second contactor KA2, the dc-to-ac converter port has electricity, auxiliary power source gets the electricity and begins work.
Referring to fig. 3, further, the auxiliary source power taking circuit further includes a semiconductor switching tube S1, and the semiconductor switching tube S1 is connected in parallel with the contact K1 of the first relay;
The control unit is used for controlling the semiconductor switching tube S1 to be conducted and controlling the contact K1 of the first relay to be disconnected when the auxiliary power supply is electrified.
In this embodiment, the semiconductor switching tube S1 is any one of the following: power diodes, field effect transistors, bipolar junction transistors, insulated gate bipolar transistors, and thyristors.
For the fast off-grid function, the contact switching of the traditional contactor or relay is in the ms level, and the judgment time in control is added, so that the whole off-grid switching time is more than 20ms, and the possibility of power failure and shutdown of a load at a user side is caused. In the switching process from off-grid to grid-connected, the contact mechanical action time tolerance of the contactor or the relay is large, so that instantaneous large current impact is easily caused by inconsistent phase of the power grid at the moment of switching, and the service life of the switching device and the work of a later stage load are influenced. By adopting the auxiliary source power-taking circuit of the embodiment, the characteristic of high response speed of the semiconductor switching tube S1 is utilized, and the on-off of the power grid side contactor is switched through the semiconductor switching tube S1, so that the 5ms rapid off-grid switching function can be realized.
Specifically, the semiconductor switching tube S1 is connected in parallel to both ends of the normally-closed contact K1 of the first relay in the coil power supply loop of the first contactor KA1, after the auxiliary power supply is powered on, the control unit controls the semiconductor switching tube S1 to be turned on, then turns off the normally-closed contact K1 of the first relay, and when the auxiliary power supply is powered on, the semiconductor switching tube S1 is used for controlling the on-off of the first contactor KA1, namely, the normally-closed contact K1 of the first relay is always in a normally-open state. The on-off time of the semiconductor switch tube S1 is ns level, the on-off time of the relay is ms level, and the on-off time of the intelligent power distribution cabinet and off-grid switching can be greatly shortened by controlling the on-off of the first contactor KA1 through the semiconductor switch tube S1.
Aiming at the problem of faults of an intelligent power distribution cabinet, the current common practice in the industry is to enable an auxiliary power supply to work electrically, then to remove a contactor on the suction power grid side, and to enable a user side to obtain electricity. The disadvantage of this approach is that once the auxiliary power source fails, the user side will power down, and even if the grid is powered up, the user cannot use the power. If the fault condition is to be solved, a circuit breaker bypass contactor may be additionally arranged as an emergency condition treatment. By adopting the auxiliary source power-taking circuit, the normally closed contact K1 of the first relay is used for controlling the first contactor KA1 on the power grid side to be attracted, and once the control circuit fails or the auxiliary power supply fails, the normally closed contact can be used for maintaining the first contactor KA1 on the power grid side to be attracted, so that the basic power consumption requirement of a user is ensured. That is, after the auxiliary power supply or the control unit of the intelligent power distribution cabinet fails, the user can normally take electricity from the power grid, and the basic electricity demand of the family is met.
Specifically, as shown in fig. 3, the coil of the first contactor KA1 is energized from the grid side, and the normally closed contact K1 of the first relay is connected in series in the energized circuit of the coil of the first contactor KA 1. When the power grid is at a point, the coil of the first contactor KA1 is electrified, the normally open contact of the first contactor KA is attracted, and the later-stage user load is electrified; the power grid is powered off, the coil of the first contactor KA1 is powered off, the normally open contact of the first contactor KA1 is disconnected, and the load of a later-stage user is powered off. When the control unit or the semiconductor switching tube S1 fails, the normally-closed contact K1 of the first relay is enabled to be normally closed, other functions of the intelligent power distribution cabinet are enabled to be stopped, and the intelligent power distribution cabinet is enabled to keep the basic power supply characteristic of the power grid. In addition, when auxiliary power supply trouble, first relay loses electricity, and its normally closed contact resumes normally closed state naturally, and the rear inverter can also report to the police the user intelligent power distribution cabinet work unusual because unable and intelligent power distribution cabinet communication simultaneously, but still can ensure that the user gets electricity from the electric wire netting is normal this moment.
Example two
The embodiment discloses an auxiliary source power supply circuit, and the auxiliary source power supply circuit in this embodiment is different from the auxiliary source power supply circuit in embodiment one in that:
In this embodiment, the third power supply terminal is connected to the smart load through the second circuit breaker QF 2. The smart load may be, for example, a high-power electrical appliance.
In this embodiment, the intelligent load refers to a load or a device used in the fields of computing, electronics, communication, and automation systems, and has a certain degree of intelligent, automation, and remote control capabilities. These loads are typically capable of sensing an environment, automatically adapting to conditions, and responding to external instructions to optimize performance, improve efficiency, or provide a higher level of functionality.
The smart loads may include smart home devices (e.g., smart lighting, smart thermostats), industrial automation systems (e.g., automatic control machines, robots), intelligent transportation systems (e.g., intelligent traffic lights, autopilots), and various embedded systems and internet of things devices.
Example III
Referring to fig. 2 and 3, the present embodiment discloses a control system of an intelligent power distribution cabinet, where the control system includes the auxiliary power supply circuit, a power grid and an inverter;
the first power supply end of the auxiliary source power taking circuit is connected with the power grid, and the second power supply end of the auxiliary source power taking circuit is connected with the inverter.
Further, the control system also comprises an oil engine or an intelligent load;
And a third power supply end of the auxiliary source power taking circuit is connected with the oil engine or the intelligent load.
By adopting the control system of the embodiment, a user can switch the load by controlling the on-off state of the second contactor KA2 so as to save electricity consumption in the off-grid mode. The auxiliary power supply generally takes power from an inverter access port, and then achieves multi-port power taking through the first relay, the second relay and the third relay.
Further, a third power supply end of the auxiliary power supply circuit is connected with the intelligent load, and a control unit of the auxiliary power supply circuit controls a normally open contact K3 of the third relay to be closed; or alternatively
The third power supply end of the auxiliary power supply circuit is connected with the oil engine, and the control unit of the auxiliary power supply circuit controls the normally open contact K3 of the third relay to be disconnected.
Specifically, on the one hand, when the third power supply port accesses the intelligent load, although the contact K2 of the second relay is a normally closed contact, the contact of the second contactor KA2 is opened due to no electricity, and the normally open contact K3 of the third relay can be controlled by the control unit to be closed, so that the contact of the second contactor KA2 is turned on, thereby realizing power supply to the intelligent load; on the other hand, when the third power supply end is connected to the oil engine, the normally-closed contact K2 of the second relay is in a normally-closed state, the normally-open contact K3 of the third relay is controlled to be disconnected through the control unit, at the moment, the contact of the second contactor KA2 can be conducted, and the second power supply end (namely the output end of the inverter) is powered on.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present application will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present application.
Claims (10)
1. The auxiliary source power taking circuit of the intelligent power distribution cabinet is characterized by comprising a first power supply end, a second power supply end, a first contactor, a first relay, a control unit and an auxiliary power supply, wherein the first power supply end is connected with a power grid, the second power supply end is connected with an inverter, the first contactor is used for controlling on-off of the circuit, and the first relay is used for controlling conversion and isolation of signals;
The first power supply end is connected with the second power supply end, the auxiliary power supply and the user load through the contact of the first contactor, and the first power supply end is also connected with the coil of the first contactor through the contact of the first relay;
the auxiliary power supply is also connected with the control unit, and the control unit is used for controlling the on-off of the contact of the first relay.
2. The auxiliary source power taking circuit of the intelligent power distribution cabinet according to claim 1, further comprising a first circuit breaker, wherein the first power supply end is connected to a power grid through the first circuit breaker, the first circuit breaker is used for breaking a current path in the circuit, and a contact of the first relay is a normally closed contact.
3. The auxiliary source power taking circuit of the intelligent power distribution cabinet according to claim 1, wherein the auxiliary source power taking circuit further comprises a third power supply end, a second contactor and a second relay, wherein the second contactor is used for controlling on-off of the circuit, and the second relay is used for controlling conversion and isolation of signals;
The third power supply end is connected with the second power supply end, the auxiliary power supply and the user load through the contact of the second contactor respectively, and is also connected with the coil of the second contactor through the contact of the second relay;
the control unit is also used for controlling the on-off of the contact of the second relay.
4. The auxiliary source power extraction circuit of an intelligent power distribution cabinet according to claim 3, further comprising a third relay;
The coil of the second contactor is connected with the second power supply end through the contact of the third relay;
the control unit is also used for controlling the on-off of the contact of the third relay.
5. The auxiliary source power taking circuit of the intelligent power distribution cabinet according to claim 3, further comprising a second circuit breaker, wherein the third power supply end is connected with an oil engine or an intelligent load through the second circuit breaker, the second circuit breaker is used for breaking a current path in the circuit, and a contact of the second relay is a normally closed contact.
6. The auxiliary source extraction circuit of an intelligent power distribution cabinet according to claim 1, further comprising a semiconductor switching tube connected in parallel with the contacts of the first relay;
And the control unit is used for controlling the semiconductor switching tube to be conducted and controlling the contact of the first relay to be disconnected when the auxiliary power supply is electrified.
7. The auxiliary source circuit of an intelligent power distribution cabinet according to claim 6, wherein the semiconductor switching tube is any one of the following: power diodes, field effect transistors, bipolar junction transistors, insulated gate bipolar transistors, and thyristors.
8. A control system of an intelligent power distribution cabinet, which is characterized by comprising the auxiliary power supply circuit, a power grid and an inverter according to any one of claims 1-7.
9. The control system of an intelligent power distribution cabinet of claim 8, wherein the control system further comprises an oil engine or an intelligent load;
And a third power supply end of the auxiliary source power taking circuit is connected with the oil engine or the intelligent load.
10. The control system of the intelligent power distribution cabinet according to claim 9, wherein a third power supply end of the auxiliary power supply circuit is connected with the intelligent load, and a control unit of the auxiliary power supply circuit controls contact closure of the third relay; or alternatively
The third power supply end of the auxiliary source power taking circuit is connected with the oil engine, and the control unit of the auxiliary source power taking circuit controls the contact of the third relay to be disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322875669.2U CN221103024U (en) | 2023-10-25 | 2023-10-25 | Auxiliary source power taking circuit and control system of intelligent power distribution cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322875669.2U CN221103024U (en) | 2023-10-25 | 2023-10-25 | Auxiliary source power taking circuit and control system of intelligent power distribution cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221103024U true CN221103024U (en) | 2024-06-07 |
Family
ID=91315638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322875669.2U Active CN221103024U (en) | 2023-10-25 | 2023-10-25 | Auxiliary source power taking circuit and control system of intelligent power distribution cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221103024U (en) |
-
2023
- 2023-10-25 CN CN202322875669.2U patent/CN221103024U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214204284U (en) | Multi-energy hybrid power station system suitable for multiple application scenes | |
| CN203056953U (en) | Driver and bus capacitor discharge circuit thereof | |
| WO2021197045A1 (en) | Medium-voltage photovoltaic grid-connected inverter system and photovoltaic power generation system | |
| CN102148529A (en) | Control device and control method thereof for intelligently supplying power to circuit breaker control unit | |
| CN108933431B (en) | Starting protection circuit and starting protection system for nuclear power station turning motor | |
| CN202906774U (en) | High-power photovoltaic inverter with automatic power-off auxiliary power supply circuit | |
| CN211089218U (en) | High-capacity high-reliability rapid power supply switching device | |
| CN211556956U (en) | High-reliability direct-current power supply for transformer substation | |
| CN201994717U (en) | Control device for supplying power to breaker control units | |
| CN201563003U (en) | Dual-power switching device for air-cooled control box of large-size power transformer | |
| JP7311564B2 (en) | Intelligent switch device and power generation system | |
| WO2023283771A1 (en) | Power supply system, protection method for power supply system, and dc/dc converter | |
| CN213817249U (en) | Output device of household energy storage system | |
| CN118399335A (en) | Photovoltaic inverter and protection method of photovoltaic string | |
| CN221103024U (en) | Auxiliary source power taking circuit and control system of intelligent power distribution cabinet | |
| CN102868214A (en) | utomatic standby power supply switching box in small water power station | |
| CN110931277A (en) | Transformer-free motor type circuit breaker and opening and closing control method thereof | |
| CN115459237A (en) | Photovoltaic system and control method | |
| CN212343340U (en) | Tower-type solar grid-disconnected inverter and grid-disconnected system | |
| CN221177361U (en) | Auxiliary source power taking circuit and control system of intelligent power distribution cabinet | |
| CN206412831U (en) | Power supply control loop of the wind-powered electricity generation double-feed current transformer in grid-connected | |
| CN106787644B (en) | Power management system and power supply method thereof | |
| CN205377313U (en) | Switch bypass circuit, converter and direct current network deployment conversion system | |
| CN114566953B (en) | Buffer circuit and grid-connected system | |
| CN220139248U (en) | Inverter system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |