CN206340984U - A kind of integrated AC/DC integrated power-supply system of multicompartment - Google Patents

Abstract

The utility model belongs to the technical field of substation power supplies, in particular to an AC-DC integrated power supply system integrated with multiple components. In the embodiment of the utility model, the integrated AC and DC power supply system is composed of intelligent switch components, intelligent power supply functional components, and intelligent parallel battery components, which can achieve the following beneficial effects: (1) shorten the supply cycle, and can produce in advance and parallel Production, design, assembly, testing, and transportation time are all greatly reduced; (2) increase the installation density; (3) facilitate maintenance and expansion, maintenance only needs standardized replacement, and the expansion components completely contain all elements and are formed at one time; (4) the largest Minimize the maintenance workload, standard external digital interface of components, standardized module design, only simple replacement for maintenance; (5) Minimize operational complexity, a large number of primary and secondary wiring PCB boards, copper row design, safe and reliable, The operation can be realized with only simple tools.

Description

A multi-component integrated AC and DC integrated power supply system

technical field

The utility model belongs to the technical field of substation power supplies, in particular to an AC-DC integrated power supply system integrated with multiple components.

Background technique

As the country vigorously promotes the construction of a strong smart grid, smart substations have become the development trend of the new generation of substations. The station power supply is the key basis for the safe operation of the substation, and the smart substation puts forward higher requirements for the overall design, operation and management level of the station power supply. As a result, the design scheme of the integrated power system for smart substations came into being. The technical scheme of the existing AC-DC integrated power supply system for substations is to integrate the AC power supply, DC operating power supply, AC uninterruptible power supply, inverter power supply, communication power supply, etc. Configuration and integrated monitoring, the integrated station power system fundamentally solves the problem of the low degree of automation of the traditional substation station power supply, which restricts the establishment of a networked management platform, the scattered design and repeated configuration of each system is poor in economy, the installation and maintenance coordination is difficult, and the operation and maintenance Inconvenience and other issues.

But existing technology also has following problems:

1. Each power module in the existing AC-DC integrated power supply system needs to add input and output accessories, which makes the modular design incomplete. For example, AC/DC, DC/DC, and DC/AC power conversion devices are already modular designs, but their input and output terminals must be equipped with corresponding accessories such as incoming and outgoing line switches, insurance, etc., so that the modular design of the entire system is not complete. , It is difficult to meet the requirements of the modular development and construction of today's substation equipment.

2. The switch is a relatively large component in the integrated power supply. Different substation projects have different requirements for the number and type of switches that determine the customization characteristics of the integrated power supply system. The over-customization of the integrated power supply system increases the delivery cycle, the quality is uneven, and the operation and maintenance efficiency is low.

3. A large number of conventional secondary lines are generated for switch quantity acquisition, electrical quantity acquisition and control, DC feeder insulation monitoring leakage current, battery pole voltage sampling line, and temperature detection. So many conventional secondary lines are not only incompatible with the overall technology of smart substations, but also hinder the improvement of operation management level.

Utility model content

The purpose of the embodiment of the utility model is to provide a multi-component integrated AC and DC integrated power supply system, which aims to solve the problem of serious project design customization caused by the difference in the number and types of switches in the current power supply system, a large number of conventional secondary line designs, and power The modular design caused by the module input and output accessories is not complete, and the open circuit of the series battery affects the voltage output of the whole group.

The embodiment of the utility model is realized in this way. A multi-component integrated AC-DC integrated power supply system is respectively connected to the AC busbar and the DC busbar. The multi-component integrated AC-DC integrated power supply system includes:

Integrated total monitoring unit;

An intelligent AC incoming switch assembly connected to the integrated total monitoring unit;

An intelligent AC power switching component connected to the integrated total monitoring unit, the intelligent AC incoming switch component and the AC busbar respectively;

A plurality of intelligent AC feeder components connected in parallel between the integrated total monitoring unit and the AC busbar; and

A plurality of intelligent DC feeder components connected in parallel between the integrated total monitoring unit and the DC bus.

In the above structure, the multi-component integrated AC and DC integrated power supply system also includes:

An AC power switching component connected to the AC busbar and the integrated total monitoring unit respectively.

In the above structure, the multi-component integrated AC and DC integrated power supply system also includes:

A plurality of indirect parallel battery assemblies connected in parallel between the AC power switching assembly and the DC bus and connected to the integrated total monitoring unit.

In the above structure, each of the indirect parallel battery assemblies includes:

CPU, AC/DC rectifier circuit, DC/DC conversion circuit, filter circuit, charging DC/DC circuit, discharging DC/DC circuit, fuse and storage battery;

The AC/DC rectifier circuit, DC/DC conversion circuit and filter circuit are sequentially connected in series between the AC power switching component and the DC bus, and the charging DC/DC circuit and fuse are connected in series between the AC/DC rectifier circuit and the DC bus. Between the batteries, the discharge DC/DC circuit is connected between the fuse and the input end of the filter circuit, and the CPU is respectively connected to the AC/DC rectifier circuit, DC/DC conversion circuit, charging DC/DC circuit, The discharge DC/DC circuit is connected, and the CPU is connected with the integrated total monitoring unit through the RS485 line.

In the embodiment of the utility model, the integrated AC and DC power supply system is composed of intelligent switch components, intelligent power supply functional components, and intelligent parallel battery components, which can achieve the following beneficial effects:

(1) shorten the lead time

It can be produced in advance and in parallel, and the design, assembly, testing and transportation time are greatly reduced;

(2) Increase the installation density

(3) Convenient maintenance and expansion

Only standardized replacement is required for maintenance, and the expansion component completely contains all elements and is formed at one time;

(4) Minimize maintenance workload

Component standard external digital interface, standardized module design, maintenance only needs simple replacement;

(5) Minimize operational complexity

A large number of primary and secondary wiring PCB boards and copper busbars are designed, safe and reliable, and the operation can be realized with simple tools.

Description of drawings

Fig. 1 is a module structure diagram of a multi-component integrated AC-DC integrated power supply system provided by an embodiment of the present invention;

Fig. 2 is a structural diagram of an indirect parallel battery assembly provided by an embodiment of the present invention.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Fig. 1 shows the module structure of the multi-component integrated AC and DC integrated power supply system provided by the embodiment of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown.

A multi-component integrated AC-DC integrated power supply system is connected to an AC bus and a DC bus respectively, and the multi-component integrated AC-DC integrated power supply system includes:

Integrated total monitoring unit 1;

An intelligent AC incoming line switch assembly 2 connected to the integrated total monitoring unit 1;

An intelligent AC power switching component 3 connected to the integrated total monitoring unit 1, the intelligent AC incoming switch component 2 and the AC busbar respectively;

A plurality of intelligent AC feeder assemblies 4 connected in parallel between the integrated total monitoring unit 1 and the AC busbar; and

A plurality of intelligent DC feeder assemblies 6 connected in parallel between the integrated total monitoring unit 1 and the DC bus.

As an embodiment of the present utility model, the multi-component integrated AC and DC integrated power supply system further includes:

An AC power switch assembly 5 connected to the AC bus and the integrated total monitoring unit 1 respectively.

As an embodiment of the present utility model, the multi-component integrated AC and DC integrated power supply system further includes:

A plurality of indirect parallel battery assemblies 7 connected in parallel between the AC power switching assembly 5 and the DC bus and connected to the integrated total monitoring unit 1 .

The parallel battery modules connected in parallel with the DC bus have independent online core capacity, which can realize free and rapid capacity expansion.

Fig. 2 shows the module structure of the multi-component integrated AC-DC integrated power supply system provided by the embodiment of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown.

Each of the indirect parallel battery assemblies 7 includes:

CPU71, AC/DC rectifier circuit 72, DC/DC conversion circuit 73, filter circuit 74, charging DC/DC circuit 75, discharging DC/DC circuit 76, fuse 77 and storage battery 78;

The AC/DC rectifier circuit 72, DC/DC conversion circuit 73 and filter circuit 74 are sequentially connected in series between the AC power switching assembly 5 and the DC bus, and the charging DC/DC circuit 75 and fuse 77 are connected in series in the Between the AC/DC rectifier circuit 72 and the storage battery 78, the discharge DC/DC circuit 76 is connected between the fuse 77 and the input end of the filter circuit 74, and the CPU 71 is respectively connected to the AC/DC rectifier circuit 72, The DC/DC conversion circuit 73, the charging DC/DC circuit 75, and the discharging DC/DC circuit 76 are connected, and the CPU 71 is connected with the integrated total monitoring unit 1 through the RS485 line.

When the AC power disappears, the storage battery 77 continuously supplies power to the load through the discharging DC/DC circuit 76 . After the AC power is restored, the storage battery 78 is charged by the charging DC/DC circuit 75 according to the charging curve. All processes and components are managed by the CPU circuit.

The indirect parallel battery assembly 7 should have the following functions:

(1) Protection function

Input overvoltage and undervoltage protection; output overvoltage and undervoltage protection; current limiting protection; short circuit protection.

(2) Battery management function

The module automatically performs perfect and intelligent battery charge and discharge management on the battery, including charge management, discharge management, temperature management, power calculation, voltage and current protection, and 0.1C core capacity management. In the normal working state of the components, the default management parameters are automatically used for intelligent management, and the parameters of battery management can be set through background software or monitoring.

The indirect parallel battery assembly 7 performs automatic capacity management on the storage batteries matched by each assembly one by one according to the system monitoring setting nuclear capacity time interval. The condition of nuclear capacity is that the battery is in the floating charging stage of the module and the AC power supply is normal. When the component receives the nuclear capacity command issued by the host computer, the internal logic of the component first judges whether it is in the floating charge stage. After the floating charge condition is met, the internal logic of the component first turns off the AC/DC rectifier circuit 72 and the charging DC/DC circuit 75 , so that the output of the assembly is powered by the storage battery 78, and the output voltage of the output discharge DC/DC circuit 76 is fine-tuned inside the assembly to achieve a discharge current of the storage battery 78 of about 0.1C. At the same time, the internal CPU7 of the module calculates the battery discharge capacity until the nuclear capacity is completed. When the CPU7 detects that the battery voltage reaches the termination voltage point, the CPU7 turns on the AC/DC rectifier circuit 72, the components switch to AC to provide energy, end the checking discharge of the battery, and start the battery charging management at the same time. The cumulative capacity reported by the component is the result of the nuclear capacity.

The intelligent AC power switching component 3, the AC power switching component 5, and the indirect parallel battery component 7 are devices with a small failure probability and are maintenance-free. They are placed in the background wall in actual use, and the incoming line busbar and outgoing line are placed behind the background wall Terminal, the interface between the background wall front and the switch.

The multi-component integrated AC and DC integrated power supply system includes an intelligent switch component, an intelligent power supply function component, and an intelligent parallel battery component. Functional components are integrated with functional body modules and input and output accessories to maximize the elimination of secondary lines and one-time jumpers. The system designs and completes the intelligent switch components by using technologies such as sensor miniaturization, metal screw operation insulation, and secondary circuit circuit boards, and various power conversion and monitoring components are designed and completed by using technologies such as interface standardization and component reintegration.

1) All switches, DC insulation monitoring, power conversion modules, and battery management in the AC-DC integrated power system are designed as various functional components to achieve a fully modular design. Through the combination of components, standardization can meet various customized needs.

2) Various functional components have standard communication interfaces for digital transmission of uplink information.

3) The entire integrated power supply system is composed of all modular design components, which can realize module production, integrated debugging, and modular distribution in the factory, effectively reduce on-site installation, wiring, and debugging work, and improve construction quality and efficiency.

In the embodiment of the utility model, the integrated AC and DC power supply system is composed of intelligent switch components, intelligent power supply functional components, and intelligent parallel battery components, which can achieve the following beneficial effects:

(1) shorten the lead time

It can be produced in advance and in parallel, and the design, assembly, testing and transportation time are greatly reduced;

(2) Increase the installation density

(3) Convenient maintenance and expansion

Only standardized replacement is required for maintenance, and the expansion component completely contains all elements and is formed at one time;

(4) Minimize maintenance workload

Component standard external digital interface, standardized module design, maintenance only needs simple replacement;

(5) Minimize operational complexity

A large number of primary and secondary wiring PCB boards and copper busbars are designed, safe and reliable, and the operation can be realized with simple tools.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (4)

1. a kind of integrated AC/DC integrated power-supply system of multicompartment, connects ac bus and dc bus, its feature exists respectively In the integrated AC/DC integrated power-supply system of the multicompartment includes：

Integrated total monitoring unit；

With the intelligent AC service entrance switch component of integrated total monitoring unit connection；

Respectively with integrated total monitoring unit, intelligent AC service entrance switch component and the intelligent AC electricity of ac bus connection Source changeover module；

It is connected in parallel on the total multiple intelligent AC feeder assemblies between monitoring unit and ac bus of integration；And

It is connected in parallel on the total multiple intelligent DC feeder assemblies between monitoring unit and dc bus of integration.

2. the integrated AC/DC integrated power-supply system of multicompartment as claimed in claim 1, it is characterised in that the multicompartment Integrated AC/DC integrated power-supply system also includes：

Respectively with the ac bus and the AC power changeover module of integrated total monitoring unit connection.

3. the integrated AC/DC integrated power-supply system of multicompartment as claimed in claim 2, it is characterised in that the multicompartment Integrated AC/DC integrated power-supply system also includes：

It is connected in parallel between the AC power changeover module and dc bus, and it is many with integrated total monitoring unit connection Individual indirect batteries in parallel connection component.

4. the integrated AC/DC integrated power-supply system of multicompartment as claimed in claim 3, it is characterised in that between described in each Connecing batteries in parallel connection component includes：

CPU, AC/DC rectification circuit, DC/DC change-over circuits, filter circuit, charging DC/DC circuits, electric discharge DC/DC circuits, insurance Silk and battery；

The AC/DC rectification circuits, DC/DC change-over circuits and filter circuit be sequentially connected in series the AC power changeover module with Between dc bus, the charging DC/DC circuits and fuse are connected between the AC/DC rectification circuits and battery, institute State electric discharge DC/DC be electrically connected between the fuse and the input of filter circuit, the CPU respectively with the AC/DC Rectification circuit, DC/DC change-over circuits, charging DC/DC circuits, electric discharge DC/DC circuit connections, the CPU pass through RS485 lines and institute State integrated total monitoring unit connection.