JP2839734B2 - Power supply - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

 [Object of the invention]

[0001]

The present invention relates to a first power supply such as a commercial power supply or a second power supply using a storage battery or a fuel cell as an energy source.
The present invention relates to a power supply device configured with a power converter that supplies stable AC power by using a power supply as an input.

[0002]

2. Description of the Related Art As a power supply for a critical load system such as a computer, an uninterruptible power supply (hereinafter simply referred to as UPS) that supplies stable AC power using a storage battery even when an AC input power failure or instantaneous voltage drop occurs. Is becoming widely used.

Conventionally, there are two types of UPS as shown in FIGS. 3 and 4. That is, FIG. 3 shows a centralized UPS system in which the UPS 1 is concentrated and arranged in a power supply room 3 different from the computer system 2 with respect to a plurality of computer systems 2, and FIG.
This is a distributed UPS system in which a UPS 1 is arranged in the vicinity of a computer system 2 every time. For large-scale systems such as online communication networks,
Normally, the centralized UPS system shown in Fig. 3 is used. However, in terms of installation space, economy, and characteristics, such as the need for a dedicated power supply room and the voltage drop due to the length of the wiring cable between the UPS and the computer system, There is a problem.

[0004]

In particular, with the rapid progress of the information and communication field in recent years, the demand for a high-quality power supply such as a UPS is rapidly increasing, and the conventional system shown in FIG. There is a limit, and it is also difficult to increase the power supply corresponding to the expansion of the computer system, etc., and it is difficult to flexibly cope with the situation unless the reserve capacity is accurately estimated and planned from the beginning. Accordingly, an object of the present invention, all SANYO been made in view of the above, in the power supply device for supplying stable AC power to the critical load system such as a computer system, it may not be provided a dedicated supply chamber, the load An object of the present invention is to provide a highly economical and space-saving power supply device that can flexibly cope with system expansion. [Configuration of the Invention]

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention supplies a stable AC power source by inputting a first power source such as a commercial power source or a second power source using a storage battery or the like as an energy source. Power conversion devices with different capacities
The power conversion equipment
High-quality power supply network for interconnecting
Connected to the high-definition power supply network
And a plurality of loads to be provided in each of the power converters.
Operation status information of the power converter to the integrated controller described
For example, the capacity of the power converter or the current output
Volume, remaining output capacity, power supply status,
Which information to give and from the integrated controller described later
Output control and power-off control in accordance with the
System controller and high-quality power supply network
The amount of load to be supplied to the plurality of loads and the
Based on the operation status information of the power converter from the rollers,
Control according to active power and reactive power borne by force converter
Parameter and closing command to the system controller
And an integrated controller.

[0006]

In the power supply device having such a configuration, a power supply,
A high-quality power supply network that is space-saving and flexible for power supply capacity expansion, etc. by optimally controlling the output and closing-off control of each power converter based on the load and the state of each power converter. Integrated control of the network.

[0007]

An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, reference numerals 11, 12, 13, and 14 denote U which can be distributed and arranged in a computer room in the same manner as 1 in FIG.
PS, 21, 22, 23, and 24 are load systems such as a computer system, 31 is a high-quality power supply network interconnecting the outputs of the UPSs 11 to 14, and 41 is the UPS 11 to 1
4 and a high-quality power supply network based on information on the conditions of the loads 21 to 24. This is an integrated controller that gives control parameters and a closing / disconnecting command to the UPSs 11 to 14 in order to integrally control the UPS 31.

The UPSs 11 to 14 may be UPSs of different capacities, and a specific configuration example is shown in FIG. That is, 51
Is a commercial power supply (first power supply), and 52 is a rectifier (converter).
58, an inverter; 54, a storage battery (second power supply); 55, a connection / disconnection switch for disconnecting and connecting to the high-quality power supply network 31; 56, an inverter;
This is an interconnection controller that controls the phase and voltage based on a command from the integrated controller 41 and controls the interconnection and disconnection in order to interconnect the data 53 to the high-quality power supply network 31. Next, the operation of the present invention having the above-described configuration will be described.

The integrated controller 41 includes loads 21 to 24
High-quality power supply network 31 based on
Determines the amount of load (demand) to be supplied into the active power and the reactive power, and determines from the information on the status of the UPSs 21 to 24 how much of the active power and the reactive power are to be assigned to which UPS or the reactive power. A control parameter corresponding to the demand such as a leading power factor operation for compensating and a closing / disconnecting command are given to the interconnection controller 56 of the UPSs 21 to 24.

As a result, the UPSs 21 to 24 are controlled by the interconnection controller 56 in the optimal control mode and control amount. (Alternatively, the connection or disconnection is controlled depending on the necessity of interconnection.) Further, regarding interconnection control, the sharing adjustment control of active power and reactive power is performed by controlling the output phase and output voltage of the inverter 53. Is a known technique,
Control criteria are provided from the integrated controller 41.

When a commercial power supply 51 serving as a first power supply loses power or an instantaneous voltage drop occurs, an inverter 53 receives a storage battery 54 serving as a second power supply as in the case of a normal UPS.
Keeps supplying power to the high-quality power supply network 31.

As described above, in this embodiment, the outputs of the UPSs of different capacities distributed and arranged are interconnected to perform optimal control according to demand by an integrated controller.
It is not necessary to provide a dedicated power supply room, and a flexible power supply system can be configured in which the UPS can be added and the interconnection can be easily performed in accordance with the load system addition.

[0013] Also, the UPS of interconnection according to demand, various modes such as disconnecting also because controlling it is efficient operation, be compensated for by the control of the well operation mode of the inverter by voltage drops reactive power increases Driving is possible.

The converter 52 in the specific configuration example of the UPS shown in FIG. 2 is a converter having a regenerative function, and a commercial power supply 51 is used for a load having a power regeneration mode such as a motor load. The power may be regenerated. The storage battery 54 serving as the second power source may be another energy source such as a fuel cell.

The integrated controller in the embodiment shown in FIG.
The controller 41 can also add information on the status of the first power supply 51 and the second power supply 54 to the parameters for integrated control. Further, the UPS in FIG. 1 is not limited to the UPS, and may be another power converter.

[0016]

As described above, according to the present invention, it is possible to provide a highly economical and space-saving power supply device which can flexibly cope with the addition of a load system represented by a distributed computer system.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a block diagram showing a specific configuration example of a UPS in FIG. 1;

FIG. 3 is a block diagram showing a configuration example of a conventional UPS system.

FIG. 4 is a block diagram showing another configuration example of a conventional UPS system.

[Explanation of symbols]

11, 12, 13, 14 ... uninterruptible power supply, 21,
2, 23, 24: load system, 31: high-quality power supply network, 41: integrated controller, 51: commercial power supply (first power supply), 52: rectifier (converter), 53 ...
Inverter, 54: storage battery (second power supply), 55: closing / disconnecting switch, 56: interconnection controller.

Claims (1)

(57) [Claims] 1. A plurality of power conversion devices having different capacities for supplying a stable AC power supply by inputting a first power supply such as a commercial power supply or a second power supply using a storage battery or the like as an energy source, and distributing the power conversion devices. A high-quality power supply network for interconnecting the outputs of the distributed power converters with each other, a plurality of loads distributed and connected to the high-grade power supply network, and each of the power converters. A system controller that is provided to provide operation status information of the power converter to an integrated controller described later, and to perform output control and closing-off control of the power converter in accordance with a command from the integrated controller described later; Load to be supplied to the load of the
Power conversion devices based on the operation status information of the power conversion devices.
Control parameters according to the active power and reactive power
To give the system controller with
Power supply device comprising
Place.