CN206894333U - A kind of uninterrupted power source and electric power system - Google Patents

A kind of uninterrupted power source and electric power system Download PDF

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Publication number
CN206894333U
CN206894333U CN201720355393.7U CN201720355393U CN206894333U CN 206894333 U CN206894333 U CN 206894333U CN 201720355393 U CN201720355393 U CN 201720355393U CN 206894333 U CN206894333 U CN 206894333U
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module
power
power source
inverter
switch component
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CN201720355393.7U
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杨建宁
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Vertiv Tech Co Ltd
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Vertiv Tech Co Ltd
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Abstract

The utility model embodiment discloses a kind of uninterrupted power source and electric power system, to solve the problems, such as that existing ups system can not be to power network feedback energy when using direction rectifier, solve simultaneously when system exports connection and loads smaller, system is in capacitive load, generator stable is influenceed, and the problem of TDHI characteristic differences.The uninterrupted power source, including:At least one (PCC) power, wherein, each (PCC) power includes:The first filtration module, the first direction rectifier module, the first discharge module, the first boost module and the first inverter module being sequentially connected, the uninterrupted power source, in addition to:Second inverter module and first switch component;Second inverter module is connected in parallel with the first inverter module bus in all (PCC) powers, and the output of second inverter module connects one end of the first switch component, the other end connection civil power input of the first switch component.

Description

A kind of uninterrupted power source and electric power system
Technical field
Power technique fields are the utility model is related to, more particularly, to a kind of uninterrupted power source and include the uninterrupted electricity The electric power system in source.
Background technology
Uninterrupted power source (Uninterruptible Power Supply, UPS) is by battery (mostly plumbic acid maintenance-free Battery) it is connected with main frame, direct current is converted into the system equipment of civil power by modular circuits such as inverters, is mainly used in To single computer, computer network system or other power electronic equipments such as offer such as magnetic valve, pressure transmitter stabilization, no The supply of electric power of interruption.
Ups system is generally made up of five parts:The power supply input circuits such as main road, bypass, battery, carry out AC-to DC (AC/DC) rectifier of conversion, direct current is carried out to the inverter of exchange (DC/AC) conversion, inversion and bypass output switching circuit And battery.
The existing parallel UPS of bus using Vienna (Vienna-like) rectifier circuit topology, as shown in figure 1, Including:N (N is natural number) individual (PCC) power, each (PCC) power include filtration module, the Vienna rectifier being sequentially connected Module, discharge module, boost module and inverter module 12, wherein, input, output and the inverter of N number of (PCC) power Bus in module 12 is connected in parallel.Inventor has found during the utility model is realized, existing to use Vienna Problems with use be present in the UPS of rectifier:
(1) because the rectifier used in ups system is direction rectifier, therefore, rectifier can not be to power network feedback energy Amount, cause output can not the load with energy feedback type, such as:Motor;
(2) when ups system connection load is smaller, system is in capacitive load, influences generator stable;
(3) when ups system connection load is smaller, system power is interrupted, input total harmonic distortion (Total Harmonic Distortion Input, TDHI) characteristic is poor.
Utility model content
The utility model embodiment provides a kind of uninterrupted power source and electric power system, makes to solve existing UPS systems With can not be to power network feedback energy during direction rectifier the problem of, while solve system export connection load it is smaller when, system In capacitive load, generator stable is influenceed, and the problem of TDHI characteristic differences.
The utility model embodiment technical scheme is as follows:
A kind of uninterrupted power source, including:At least one (PCC) power, wherein, each (PCC) power includes:It is sequentially connected First filtration module, the first direction rectifier module, the first discharge module, the first boost module and the first inverter module, The first filtration module connection civil power input, the output connection load of first inverter module, and all (PCC) powers Input, output end and the bus of the first inverter module be connected in parallel, the uninterrupted power source, in addition to:Second Inverter module and first switch component;Second inverter module and the first inverter module in all (PCC) powers Bus is connected in parallel, and the output of second inverter module connects one end of the first switch component, and described first opens Close the other end connection civil power input of component.
A kind of electric power system, including:The uninterrupted power source that the utility model above-described embodiment provides.
According to the technical scheme of the utility model embodiment, by added in uninterrupted power source the second inverter module and First switch component so that when first switch component closes, the second inverter module is accessed into civil power, so as to the second inverter The energy of bus can directly be fed back to power network by module, and avoiding can not be to when using direction rectifier in existing UPS systems Power network feedback energy, it is impossible to the problem of connecting energy feedback type load, meanwhile, the second inverter module access civil power, it can mend Repay the power factor of harmonic current that all (PCC) powers input to power network and power network, and pass through the second inverter module will Bus energy-feedback power grid, solves the problems, such as discontinuous current, and so as to solve when system exports connection and loads smaller, system is in Capacitive load, generator stable is influenceed, and the problem of TDHI characteristic differences.
Other features and advantages of the utility model will illustrate in the following description, also, partly from specification In become apparent, or understood by implementing the application.The purpose of the application and other advantages can be by being write Specifically noted structure is realized and obtained in specification, claims and accompanying drawing.
Brief description of the drawings
Fig. 1 is the circuit topological structure schematic diagram of prior art median generatrix parallel UPS;
Fig. 2A is a kind of structural representation for uninterrupted power source that the utility model embodiment provides;
Fig. 2 B are the structural representation for the uninterrupted power source partial enlargement that the utility model embodiment provides;
Fig. 3 is the structural representation for another uninterrupted power source that the utility model embodiment provides;
Fig. 4 is the structural representation for the another uninterrupted power source that the utility model embodiment provides.
Embodiment
Embodiments herein is illustrated below in conjunction with accompanying drawing, it will be appreciated that embodiment described herein is only used In description and interpretation the application, it is not used to limit the application.
Can not be to power network feedback energy when using direction rectifier for existing ups system, and export and connect in system When load is smaller, system is in capacitive load, influences generator stable, and the problem of TDHI characteristic differences, the utility model embodiment carries A kind of uninterrupted power source and electric power system are supplied, by adding the second inverter module and first switch group in uninterrupted power source Part so that when first switch component closes, the second inverter module is accessed into civil power, so as to which the second inverter module can incite somebody to action The energy of bus directly feeds back to power network, and avoiding can not be to power network feedback energy when using direction rectifier in existing ups system Amount, it is impossible to the problem of connecting energy feedback type load, meanwhile, the second inverter module access civil power, it can compensate for all power The harmonic current and the power factor of power network that component inputs to power network, and returned bus energy by the second inverter module Transmission network, solve the problems, such as discontinuous current, so as to solve when system exports connection and loads smaller, system is in capacitive load, Generator stable is influenceed, and the problem of TDHI characteristic differences.
What deserves to be explained is (first is whole for direction rectifier module in the uninterrupted power source that the utility model embodiment provides Unidirectional stream device module and/or the second direction rectifier module) include but is not limited to Vienna rectifier, any energy one-way flow Rectifier can use;Inverter module (the first inverter module and/or the second inverter module) includes but is not limited to T-shaped two-level inverter and T-shaped three-level inverter, any four-quadrant converter can use, and the utility model is implemented By taking the rectifier of Vienna as an example, inverter module is carried out direction rectifier module by taking T-shaped two-level inverter as an example in example Explanation.
The embodiment of the present application is described in detail below.
(1), the utility model embodiment provide firstly a kind of uninterrupted power source:
The uninterrupted power source that the utility model embodiment provides, as shown in Figure 2 A, including:
At least one (PCC) power ((PCC) power 1 as illustrated to (PCC) power N, wherein, N is natural number), often Individual (PCC) power includes:The first filtration module for being sequentially connected, the first direction rectifier module, the first discharge module, first liter Die block and the first inverter module, the connection civil power input of the first filtration module, the output connection of the first inverter module are negative Carry, and the bus of the input, output end of all (PCC) powers and the first inverter module is connected in parallel, the uninterrupted electricity Source, in addition to:Second inverter module 21 and first switch component 22;
Second inverter module 21 is connected in parallel with the first inverter module bus in all (PCC) powers, and second is inverse Become one end of the output connection first switch component 22 of device module 21, the other end connection civil power input of first switch component 22.
To the second inverter module 21 and the circuit of the part of first switch component 22 in the uninterrupted power source that is shown in Fig. 2A Structure is amplified, as shown in Figure 2 B, the second inverter module 21 and the first inverter module bus in all (PCC) powers It is connected in parallel, and when first switch component 22 closes, the output access civil power of the second inverter module 21, so as to by mother Energy feedback in line is into power network.
Certainly, what deserves to be explained is, the utility model embodiment provide uninterrupted power source in also include battery module with And charging module, wherein, the (PCC) power in uninterrupted power source electrically connects with city, civil power input it is normal when, (PCC) power to Charging battery module;When civil power input is abnormal, battery module is powered to (PCC) power.In addition, in the utility model embodiment The first switch component mentioned includes the switch element being arranged in each circuitry phase.
More preferably, the uninterrupted power source that the utility model embodiment provides, as shown in figure 3, can also include:Second Switch module 31, one end of second switch component 31 are connected with the output of the second inverter module 21, second switch component 31 Other end connection load.
When uninterrupted power source works, second switch component 31 can be disconnected, first switch component 22 closes so that the Two inverter modules 21 output access civil power, so as to by the energy feedback in bus into power network, can also be by second Switch module 31 closes, and first switch component 22 disconnects so that the output of the second inverter module 21 connects with load.
It is further preferable that the uninterrupted power source that the utility model embodiment provides, as shown in figure 4, can also include:Second Switch module 41 and the second filtration module being sequentially connected, the second direction rectifier module, the second discharge module, the second boosting Module;Wherein, the input of the second filtration module connection civil power, two output ends of the second direction rectifier module are inverse with second respectively The bus both ends for becoming device module 21 are connected, and one end of second switch component 41 is connected with the output of the second inverter module 21, the The other end connection load of two switch modules 41.
When uninterrupted power source works, second switch component 41 can be disconnected, first switch component 22 closes so that the Two inverter modules 21 output access civil power, so as to by the energy feedback in bus into power network, can also be by second Switch module 41 closes, and first switch component 22 disconnects so that the second inverter module 21 and the second filtering being sequentially connected Module, the second direction rectifier module, the second discharge module, the second boost module form the N+1 (PCC) power.
(2) conceived based on identical utility model, the utility model embodiment additionally provides a kind of electric power system:
The electric power system that the utility model embodiment provides includes the uninterrupted power source that the utility model embodiment provides, and uses In to DC load and/or AC load power supply.
In summary, it is inverse by adding second in uninterrupted power source according to the technical scheme of the utility model embodiment Become device module and first switch component so that when first switch component closes, the second inverter module is accessed into civil power, so as to The energy of bus can directly be fed back to power network by the second inverter module, be avoided in existing ups system using one-way commutation Can not be to power network feedback energy during device, it is impossible to the problem of connecting energy feedback type load, meanwhile, the second inverter module access city Electricity, the power factor of harmonic current that all (PCC) powers input to power network and power network is can compensate for, and it is inverse by second Become device module by bus energy-feedback power grid, solve the problems, such as discontinuous current, so as to solve system export connection load compared with Hour, system is in capacitive load, influences generator stable, and the problem of TDHI characteristic differences.
Obviously, those skilled in the art can carry out various changes and modification without departing from this practicality to the utility model New spirit and scope.So, if these modifications and variations of the present utility model belong to the utility model claims and Within the scope of its equivalent technologies, then the utility model is also intended to comprising including these changes and modification.

Claims (7)

1. a kind of uninterrupted power source, including:At least one (PCC) power, wherein, each (PCC) power includes:Be sequentially connected One filtration module, the first direction rectifier module, the first discharge module, the first boost module and the first inverter module, institute State the connection civil power input of the first filtration module, the output connection load of first inverter module, and all (PCC) powers The bus of input, output end and the first inverter module is connected in parallel, it is characterised in that the uninterrupted power source, also Including:Second inverter module and first switch component;
Second inverter module is connected in parallel with the first inverter module bus in all (PCC) powers, and described second The output of inverter module connects one end of the first switch component, and the other end connection civil power of the first switch component is defeated Enter.
2. uninterrupted power source according to claim 1, it is characterised in that the uninterrupted power source, in addition to:Second switch Component, one end of the second switch component are connected with the output of second inverter module, the second switch component Other end connection load.
3. uninterrupted power source according to claim 1, it is characterised in that the uninterrupted power source also includes:Second switch Component and the second filtration module being sequentially connected, the second direction rectifier module, the second discharge module, the second boost module;
Wherein, the second filtration module connection civil power input, two output ends difference of the second direction rectifier module It is connected with the bus both ends of second inverter module, one end of the second switch component and second inverter module Output be connected, the connection load of the other end of the second switch component.
4. according to the uninterrupted power source any one of claim 1-3, it is characterised in that the first direction rectifier mould Block, including:Vienna rectifier.
5. uninterrupted power source according to claim 3, it is characterised in that the second direction rectifier module, including:Dimension Also rectifier is received.
6. according to the uninterrupted power source any one of claim 1-3, it is characterised in that first inverter module And/or second inverter module, including:T-shaped two-level inverter.
A kind of 7. electric power system, it is characterised in that the electric power system include as any one of claim 1-6 not between Power-off source.
CN201720355393.7U 2017-04-06 2017-04-06 A kind of uninterrupted power source and electric power system Active CN206894333U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720355393.7U CN206894333U (en) 2017-04-06 2017-04-06 A kind of uninterrupted power source and electric power system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720355393.7U CN206894333U (en) 2017-04-06 2017-04-06 A kind of uninterrupted power source and electric power system

Publications (1)

Publication Number Publication Date
CN206894333U true CN206894333U (en) 2018-01-16

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Country Status (1)

Country Link
CN (1) CN206894333U (en)

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