CN201839195U

CN201839195U - AC-DC dual-purpose high-voltage DC power supply system

Info

Publication number: CN201839195U
Application number: CN2010205929793U
Authority: CN
Inventors: 黎福根; 王怀忠; 孔庆海; 杨水根
Original assignee: Hu'nan Fengri Power And Electric Co Ltd
Current assignee: Hu'nan Fengri Power And Electric Co Ltd
Priority date: 2010-11-05
Filing date: 2010-11-05
Publication date: 2011-05-18
Anticipated expiration: 2020-11-05

Abstract

The utility model discloses an AC-DC dual-purpose high-voltage DC power supply system and aims at providing a high-voltage DC power supply system which can provide not only DC power supply but also AC power supply. The high-voltage DC power supply system comprises an AC power distribution unit, rectification modules, an inverter module, a monitoring module, a storage battery pack and a DC power distribution unit. The AC power distribution unit is connected with the rectification modules, and the rectification modules are respectively connected with the DC power distribution unit, the inverter module and the storage battery pack. The DC power distribution unit is connected with each DC load, and the inverter module is connected with each AC load. The monitoring module is connected with the AC power distribution unit, the rectification modules, the inverter module, the storage battery pack and the DC power distribution unit.

Description

A kind of high-voltage direct current (DC) power system of AC/DC

Technical field

The utility model relates to the power-supply system field, relates in particular to a kind of AC and DC dual-purpose high voltage DC power system.

Background technology

In recent years, IPization along with the communication technology, information technoloy equipment has obtained a large amount of application, safety and reliability requirement for power supply are more and more higher, because high-voltage direct current (DC) power system is compared energy-conservation, reliable with traditional UPS, aspects such as investment, maintenance have huge advantage, and beginning progressively substitutes traditional UPS power supply in communications equipment room.

Replace in the process of traditional UPS power supply at high-voltage direct current (DC) power system, the high-voltage DC power supply of Application and Development can only provide DC power supply at present, and the band DC load can not provide AC power, can not be with AC load.In fact, most equipment is a DC load in communication network or the information network, but also has fraction equipment can only use AC power, as fan, miniature transformer, CRT monitor, inductive load, have equipment that incoming frequency detect to start etc.For DC load, can directly adopt the high-voltage direct current (DC) power system power supply, but for AC load, the user just have to use directly former civil power to power.This has not only limited the range of application of high-voltage direct current (DC) power system greatly, in case and mains failure, will cause the AC load cisco unity malfunction, thereby cause network portion paralysis.High-voltage direct current (DC) power system can only provide direct current supply, can not provide Alternating Current Power Supply this shortcoming, brought very big risk not only for whole rear end using electricity system, and brought a lot of practical difficulties for the transformation of back-up source, also hinder high-voltage DC power supply simultaneously and replaced the paces that UPS powers.

The utility model content

Providing a kind of at the problems referred to above can provide direct current supply to the utility model exactly, and the high-voltage direct current (DC) power system of Alternating Current Power Supply can be provided again simultaneously.

For achieving the above object, the utility model adopts following technical scheme: the utility model mainly comprises Alternating Current Unit, rectification module, inverter module, monitoring module, batteries and Direct Current Distribution Unit.

Alternating Current Unit connects the input of each rectification module, and the output of rectification module divides three the tunnel, the three tunnel to be in state in parallel, and one the tunnel directly connects Direct Current Distribution Unit, and one the tunnel connects the input of inverter module, also has one the tunnel to connect batteries.

Direct Current Distribution Unit connects each DC load, and inverter module connects each AC load;

Batteries when being used for the AC input cell power failure, provides power supply to Direct Current Distribution Unit, inverter module, makes DC load and AC load energy operate as normal.

Rectification module, being used to transform alternating current is direct current, comprises power factor correction rectification and DC twin-stage circuit.The power factor correction rectification is used for input ac voltage is rectified into direct voltage, simultaneously input ac power is proofreaied and correct to consistent with the input voltage waveform phase place, reduces Harmonics of Input and improves input power factor; The DC circuit is a pulse width modulation type DC circuit.

Monitoring module is connected with Alternating Current Unit, rectification module, inverter module, batteries and Direct Current Distribution Unit by holding wire, is used to monitor system's controls such as each unit running status, signals collecting, operation setting, batteries discharge and recharge, engineering output monitoring, fault judgement, fault alarm.

High-voltage direct current (DC) power system direct current output nominal voltage is: 240V, 288V, 300V, 312V, 360V or 384V.

High-voltage direct current (DC) power system ac converter output nominal voltage is: 220V.

The beneficial effects of the utility model are:

1, the utility model provides a kind of direct current supply can be provided, and the high-voltage direct current (DC) power system of Alternating Current Power Supply can be provided again simultaneously.When improving system reliability, the user needn't change former any power consumption equipment, avoids overlapping investment, reduces the maintenance of system.

2, with respect to prior art, the utility model high-voltage DC power supply can provide direct current supply can provide Alternating Current Power Supply again,, guarantee the user under situation about having a power failure suddenly, the power consumption equipment of all communications or IT network can operate as normal.

Description of drawings

Fig. 1 is the structured flowchart of the utility model high-voltage direct current (DC) power system;

Fig. 2 is the utility model inversion module structured flowchart.

Embodiment

The following stated only is preferred embodiment of the present utility model, does not therefore limit protection range of the present utility model.

Consult shown in Figure 1, in the utility model, after the two-way AC power automatically switches into one tunnel general supply through Alternating Current Unit 1, AC power is connected to each rectification module 2, what the input/output terminal of rectification module adopted is integrated hot-pluggable type socket, each rectification module is by inner rectification of PFC circuit of power factor correction and PWM type DC/DC conversion twin-stage circuit, input ac power is transformed into stable high-voltage DC power supply, gather Fen Sanlu after the output of each rectification module, three the tunnel are in state in parallel, one the tunnel directly connects Direct Current Distribution Unit 5, and one the tunnel connects the input of inverter module 4, also has one the tunnel to connect batteries 3.Described Direct Current Distribution Unit 1 connects each DC load 7, and described inverter module 4 outputs connect each AC load 8.Monitoring module 6 is connected with Alternating Current Unit 1, rectification module 2, inverter module 4, batteries 3 and Direct Current Distribution Unit 5 by holding wire.

Below in conjunction with Fig. 2, specifically structure and the operation principle to inverter module 4 describes:

Inverter module 4 comprises AC input cell 9, continuous input cell 10, DC filtering unit 11, inversion unit 12, switch unit 13, ac filter unit 14, exchanges output unit 15.

AC input cell 9 one termination civil powers, a termination switch unit 13.Continuous input cell 10 connects batteries 3, through DC filtering unit 11, inversion unit 12 is connected to switch unit 13.AC input cell 9 is state in parallel with continuous input cell 10, after switch unit 13 converges, is connected to through ac filter unit 14 and exchanges output unit 15.Wherein, inversion unit (12) all links to each other with the control output end of monitoring module 6 with the control end of switch unit (13).

When monitoring module 6 detects civil power just often, to control switch unit 13 and connect AC input cell 9, alternating current is directly powered to AC load 8 through switch unit 13, ac filter unit 14, interchange output circuit 15.When monitoring module 6 detected mains failure, control switch unit 13 was connected direct-flow input circuit 10, and controlled inversion unit 12 and work immediately, disconnected ac input circuit 9 simultaneously.Batteries 3 is to continuous input cell 9 input dc powers, direct current through DC filtering unit 11 filtering after, with the noise filtering of DC power supply, obtain stably direct current, send into inversion unit 12.

Inversion unit 12 adopts the SPWM pulse modulation technology, unique nonlinear Control circuit, advanced DC-AC electrical isolation technology, after DC power supply is converted to sine ac power supply, be connected to switch unit 13, through the AC harmonic and the interference of ac filter unit 14 filterings output, make output more steady again.Alternating current behind the ac filter is by exchanging output unit 15 to AC load 8 power supplies.

Inverter module 4 adopts intelligent microcomputerized control technology, and the control inverter power supply is followed the benchmark civil power, and phase place and the frequency identical with its maintenance, regulates automatically, and makes power supply within the limits prescribed, according to operation of protection value and the protection set.

Inverter module 4 can be according to the size of load, and mode that can a plurality of parallel connections is carried out dilatation.And monitoring module 6 communications by communication interface and high-voltage direct current (DC) power system, can monitor its data and operating state at any time.

Claims

1. the high-voltage direct current (DC) power system of an AC/DC, comprise Alternating Current Unit (1), rectification module (2), inverter module (4), monitoring module (6), batteries (3) and Direct Current Distribution Unit (5), it is characterized in that: Alternating Current Unit (1) connects rectification module (2), rectification module (2) connects Direct Current Distribution Unit (5) respectively by parallel connection, inverter module (4) and batteries (3), Direct Current Distribution Unit (5) connects several DC load (7), inverter module (4) connects several AC load (8), monitoring module (6) and Alternating Current Unit (1), rectification module (2), inverter module (4), batteries (3) and Direct Current Distribution Unit (5) connect.

2. the high-voltage direct current (DC) power system of a kind of AC/DC according to claim 1, it is characterized in that: the inversion unit (12) in the described inversion module (4) all links to each other with the control output end of monitoring module (6) with the control end of switch unit (13).

3. the high-voltage direct current (DC) power system of a kind of AC/DC according to claim 1, it is characterized in that: described inverter module (4) can take the mode of a plurality of parallel connections to carry out dilatation according to the size of load.

4. the high-voltage direct current (DC) power system of a kind of AC/DC according to claim 1, it is characterized in that: described inverter module (4) can be monitored its data and operating state at any time by monitoring module (6) communication of communication interface and high-voltage direct current (DC) power system.