CN2264928Y

CN2264928Y - Double UPS series power supply unit

Info

Publication number: CN2264928Y
Application number: CN 96204740
Authority: CN
Inventors: 王清
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-03-22
Filing date: 1996-03-22
Publication date: 1997-10-15
Anticipated expiration: 2006-03-22

Abstract

The utility model relates to a supply unit for double UPS machines which are connected in series. The goal of the utility model is to enhance economic benefit and to achieve full power supply without interruption. The electricity used by equipment is divided into primary electricity and secondary electricity; two UPS respectively operate to supply power for the primary electric equipment and the secondary electric equipment. An uninterrupted switch is adopted; when a primary electric UPS is in maintenance or occurs failure, a secondary electric UPS can supply power for the primary electric equipment through a transfer switch. The utility model has the advantage of high equipment capacity utilization rate and has a power supply mode without interruption when the primary equipment is maintained.

Description

UPS two-shipper series-fed device

The utility model makes UPS performance maximum economic benefits, and fully reaches the power supply of not interrupting major equipment fully relevant for a kind of series-fed device of uninterrupted power supply (ups) Unity, and the efficient height can be saved great amount of cost.

General host computer or its relevant peripheral equipment all require 100% can not have a power failure in the running, in order to avoid the capsule information in the computer run off or produce mistake, result in greater loss.Especially in some large-scale computer network systems, the built-in ten hundreds of data of its main frame causes computer crash as mishap is arranged slightly because of power failure, and its loss often can't be remedied.So general computer host system all utilizes uninterrupted power source (that is UPS) to be powered at system and peripheral equipment thereof, to keep electric power continuous.And general UPS mostly utilizes unit running or two-shipper parallel running or three machine parallel runnings.As with unit running, break down or the misgivings of power failure are arranged during in maintenance at UPS, cause power failure, this power supply mode of neither use in general more important computer system.And use two-shipper parallel running or three machine parallel runnings, if when a UPS breaks down, though the unlikely normal power supply that influences, but its cost of investment height, the non-constant of economic benefit, waste very big space again, real is the uneconomic practice of a kind of inefficiency, lifts the economic benefit value of an example explanation two-shipper parallel running and three machine parallel runnings now:

1. two-shipper parallel running:

Suppose that the main electricity consumption of computer equipment is 1, with plant factor 0,8, its single-machine capacity=main electricity consumption ÷ 0.8=1.25 * main consumption (1)=1.25, and be standby with another UPS, single-machine capacity is all 1.25, so total UPS capacity must be 1.25 * 2=2.5, and in fact its main electricity consumption only is 1, so its total economic benefit is 1 ÷ 2.5=0.4.

2. three machine parallel runnings:

Single-machine capacity=1 * 1.25 (80% plant factor) ÷ 2=0.625, then total UPS capacity=0.625 * 3=1.875, and in fact its main electricity consumption only is 1, so total economic benefit is 1 ÷ 1.875=0.533.

Learn by above two example calculation, present traditional parallel running of UPS two-shipper and three machine parallel running systems, the non-constant of its economic benefit, only reach 50% or 50% less than, and its cost of investment is quite high, except the machine of the purchasing cost of twice, along needing the burden cost of upkeep expensive more a lot of than unit, energy charge and space expenses, the burden of a kind of costliness of can saying so, and on the other hand, since two-shipper parallel running or three machine parallel runnings, its two UPS output frequency phase places, voltage and electricity consumption quality of balance cause reflux problem between two, the stability of its voltage, reliability is all come well not as good as the unit running.Yet though its economic benefit height of unit running, good stability has the unsafe misgivings of power supply.

The purpose of this utility model promptly provides a kind of UPS two-shipper series-fed device, can increase economic efficiency and improve the stability of UPS running.

For achieving the above object, a kind of UPS two-shipper series-fed device of the present utility model, comprise a main electricity consumption UPS and the less important electricity consumption UPS for less important consumer power supply for main consumer power supply, be characterized in that described main electricity consumption UPS and described less important electricity consumption UPS are connected in series mutually; Also comprise the bypass loop and a switch that can connect with main consumer, when described main electricity consumption UPS breaks down or maintains, described switch can be connected in described bypass loop with described less important electricity consumption UPS, so that described main consumer is powered.

In the utility model, with the equipment of desiring by the UPS power supply, under the prerequisite that does not influence construction cost, the equipment electricity consumption is divided into main electricity consumption and less important electricity consumption, such as in a large-scale computer system, host computer is classified as main electricity consumption, other peripheral equipments such as terminating machine, printer, picture machine or its input and output device are classified as less important electricity consumption, be powered at main consumer and less important consumer by the UPS of two platform independent running respectively again, when the UPS of main electricity consumption breaks down or in when maintenance, can switch switch through one by the UPS of less important electricity consumption and send electricity to major equipment.

Description is described structure of the present utility model and function in detail:

Fig. 1 is the utility model UPS two-shipper series-fed system line chart;

Fig. 2 is used change-over switch contact switching sequence figure by the utility model;

Fig. 3 is the utility model UPS two-shipper series-fed system block diagrams;

The utility model UPS two-shipper series-fed system, as shown in Figure 1, the upper end is UPS1, main consumer 4 is given in power supply, the below is UPS2, less important consumer 5 is given in power supply, and when breaking down as if the UPS1 that uses for main consumer, UPS1 can be transformed on the current supply circuit of bypass automatically by inverter.Two electric power loops of UPS2 output supply, a loop offers less important consumer 5 and uses, and another loop then becomes the bypass loop of main power-supply unit UPS1, utilizes ground wire to adjust the phasing degree of two UPS and voltage difference to minimum value as common reference points.Therefore UPS1 is no matter by inverter output power supply or bypass output power supply, the two all has the double protection functions of ups power.

Among Fig. 1, the UPS1 of upper end is powered at main consumer 4, and the UPS2 of below is powered at less important consumer 5.When if the UPS1 of main electricity consumption 4 breaks down, can produce a signal and control automatic change over 7 and automatically switch to bypass (BY-PASS) loop, and the bypass loop of the main consumer 5 in upper end connects the UPS2 of less important electricity consumption, so UPS2 can supply power to main consumer, if and the UPS1 of main electricity consumption is need maintain the time, then utilize manual switching, change-over switch 3 is switched on another bypass loop, also promptly switch on the current supply circuit of UPS2, so no matter UPS1 breaks down or maintains, all can not cause main consumer outage, and main at ordinary times consumer 4 and less important consumer 5 are all with an independently UPS power supply, its voltage stability, reliability is good as unit, has improved the shortcoming of two-shipper parallel connection.

In addition, manual switching switch 3 is a special unbroken switch, when operation, and instant cut-off phenomenon in the time of can not causing switch to switch (this phenomenon is enough to make them data to produce mistake for some responsive host computer, even crashes).Fig. 2 promptly is the action timing diagram of the change-over switch of the utility model use, by the variation that can find out each angle CA and CB in its sequential chart, the CA contact is connected to bypass loop in this example, and CB is connected to main UPS loop, and according to action timing diagram, when change-over switch 3 switches to 60 ° by 90 °, the on of CA contact, and the CB contact does not leave as yet, when switching to 30 °, the CA contact is still connected, and the CB contact is so far just opened, so when change-over switch 3 switched to bypass loop, change-over switch 3 can not produce these characteristics of disruption of moment can guarantee the effect that main consumer power supply is never interrupted, improved the security of electricity consumption, this is incomparable by the unit running.Change-over switch 3 and automatic change over 7 have interlock protection design, and maloperation can not cause power breakdown or unusual yet in normal operation.As shown in Figure 2, this change-over switch 3 is provided with an auxiliary contact (AUX) in addition, this auxiliary contact can be connected on the automatic switching circuit of main consumer UPS1, when by the UPS1 normal power supply, as change-over switch 3 by maloperation, the auxiliary contact of change-over switch can be sent a signal earlier to the UPS1 automatic switching circuit, circuit automatically switches to (that is by UPS2 power supply) on the bypass loop, and since change-over switch CA and CB contact do not interrupt, even change-over switch 3 is at random operated, can not slip up yet and cause power failure.

Moreover, lift a calculated examples now and be described as follows with economic benefit:

1. suppose that main electricity consumption equates with the equipment electricity consumption of less important electricity consumption, be all 1,

UPS1=1 ÷ 0.8=1.25 (with plant factor 80%) then

UPS2＝1+1＝2，

So total UPS capacity is 1.25+2=3.25,

Total economic benefit is 2 ÷ 3.25=0.6

1. unit economic benefit, UPS1=1 ÷ 1.25=0.8

UPS2＝1÷2＝0.5

2. suppose that main electricity consumption is 1, less important electricity consumption is 2 o'clock

UPS1＝1÷0.8＝1.25

UPS2＝1+2＝3，

Total UPS capacity is 1.25+3=4.25

So total economic benefit is 3 ÷ 4.25=0.705

Unit economic benefit UPS1=1 ÷ 1.25=0.8

UPS2＝2÷3＝0.66

3. suppose that main electricity consumption is 1, less important electricity consumption is 3 o'clock,

UPS1＝1÷0.8＝1.25

UPS2＝1+3＝4，

Total UPS capacity is 1.25+4=5.25

So total economic benefit is 4 ÷ 5.25=0.76

Unit economic benefit UPS1=1 ÷ 1.25=0.8

UPS2＝3÷4＝0.75

So comprehensive above-mentioned three hypothesis are compared with traditional two-shipper parallel running or three machine parallel runnings, the comparison sheet that can get an economic benefit is as follows:

	UPS1	UPS2	Total economic benefit	The total economic benefit of tradition two-shipper parallel running	The total economic benefit of tradition three machine parallel runnings
	UPS1	UPS2	Total economic benefit			Main electricity consumption=1 less important electricity consumption=1	0.8	0.5	0.61	0.4	0.533
Main electricity consumption=1 less important electricity consumption=2	0.8	0.66	0.705	0.4	0.533		0.8	0.5	0.61	0.4	0.533
	0.8	0.66	0.705	0.4	0.533	Main electricity consumption=1 less important electricity consumption=3	0.8	0.75	0.76	0.4	0.533

Comprehensive above-mentioned explanation and comparison, the utility model is aspect the security of keeping power supply, can keep main electricity consumption power supply never interrupts, even if when UPS1 breaks down, also can supply main consumer and less important consumer by UPS2, and if UPS2 is when breaking down, main consumer is still powered by UPS1, less important consumer can switch to civil power by its automatic change over, by commercial power supply, so, can keep the power supply of main consumer and less important consumer never to interrupt in the bulk supply security.Again with power supply quality, it is similar to the use of one-of-a-kind system, on supply voltage stability and reliability, the backflow and the unsteady problem of voltage that do not have two-shipper parallel connection, three parallel connections to be produced, be not easy to break down, and weigh with total economic benefit, no matter under which kind of situation, total the economic benefit of series-fed system than two-shipper parallel connection, three machines in parallel come high (seeing the above table).So generally, the utility model cost of investment is low, economic benefit is high, power supply safety is reliable, power supply quality is stable, improved the shortcoming of traditional general UPS parallel system, and main consumer and less important consumer distribution of electrical power, adjust by switchboard, so in the planning of whole electric system, do not have the puzzlement of design and construction, also can not increase engineering cost.

Claims

1. a UPS two-shipper series-fed device comprises a main electricity consumption UPS and the less important electricity consumption UPS for less important consumer power supply for main consumer power supply, it is characterized in that described main electricity consumption UPS and described less important electricity consumption UPS are connected in series mutually; Also comprise the bypass loop and a switch that can connect with main consumer, when described main electricity consumption UPS breaks down or maintains, described switch can be connected in described bypass loop with described less important electricity consumption UPS, so that described main consumer is powered.