CN210157071U - Large and medium-sized high-voltage frequency converter group control system adopting external UPS power supply for power supply - Google Patents
Large and medium-sized high-voltage frequency converter group control system adopting external UPS power supply for power supply Download PDFInfo
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- CN210157071U CN210157071U CN201920842296.XU CN201920842296U CN210157071U CN 210157071 U CN210157071 U CN 210157071U CN 201920842296 U CN201920842296 U CN 201920842296U CN 210157071 U CN210157071 U CN 210157071U
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Abstract
The utility model relates to an adopt the big-and-middle-sized high voltage frequency converter group control system of external UPS power supply for solve the little life of the UPS power capacity of current big-and-middle-sized high voltage frequency converter group control system self-bring, be not convenient for daily patrol and examine and overhaul the maintenance, and the interference killing feature leads to converter tripping operation scheduling problem poor. The large and medium high-voltage frequency converter group control system adopting the external UPS power supply for power supply comprises a large and medium high-voltage frequency converter group, a load distribution cabinet and an external UPS power supply unit; the load distribution cabinet comprises a load master switch and miniature circuit breakers with selective protection, wherein the miniature circuit breakers are in one-to-one correspondence with the control power supplies of the large and medium high-voltage frequency converters; the output end of the external UPS power supply unit is connected with one end of a load main switch, the other end of the load main switch is connected with the input end of each miniature circuit breaker with selective protection, and the output end of each miniature circuit breaker with selective protection is respectively connected with the control power supply of the large and medium high-voltage frequency converter corresponding to the output end of the miniature circuit breaker with selective protection.
Description
Technical Field
The utility model relates to a large-and-medium-sized high voltage frequency converter group control system, concretely relates to large-and-medium-sized high voltage frequency converter group control system who adopts external UPS power supply.
Background
With the development of frequency converter technology and variable frequency motors and the national advocated creation of a sustainable development society with green, low carbon, energy conservation and emission reduction, the frequency converter technology is increasingly applied to industries such as industry, agriculture, household appliances and the like, particularly, in recent years, large and medium-sized frequency converters are applied to the industry, more and more high-power devices are controlled by the frequency converters, the control precision is high, the energy consumption is low, and the effect is particularly obvious.
The Shaanxi Weihe Power generation Limited company is generally provided with 4 multiplied by 300MW, each unit is provided with 1 suction fan, 2 air blowers, 2 condensate pumps, 1 electric feed pump (50% capacity for spare) and 8 heat supply circulating pumps of a heat supply system, and the like, and the units are transformed into a large-scale high-voltage frequency converter for control, so that the effects of saving the service power and reducing the power supply coal consumption are obvious.
The large-scale high-voltage frequency converter adopts a built-in UPS, and mainly provides a stable uninterrupted control power supply for a control system of the frequency converter, but the built-in UPS control power supply generally has the following problems:
1. the UPS configured by the frequency converter has small capacity and short service life, and the time of a backup battery is insufficient;
2. the UPS configured by the frequency converter is arranged in the cabinet, so that the daily inspection and the maintenance are inconvenient;
3. the frequency converter has strict requirements on a control power supply, a UPS configured by the frequency converter is a non-industrial UPS, a bypass power supply is not configured, the power supply of the frequency converter is only commercial power, an accident standby power supply is not provided, and the operation reliability is poor;
4. the UPS built in the frequency converter has poor anti-jamming capability, and the frequency converter trips under external disturbance conditions such as power failure, undervoltage, voltage drop interference or surge when a high-capacity high-voltage motor system is started.
The problems lead to tripping of the frequency converter for many times, so that the safety and stability of the unit are threatened, and the economic benefit of production is greatly lost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an adopt the big-and-middle-sized high voltage frequency converter group control system of external UPS power supply to solve the little life of the UPS power capacity of current big-and-middle-sized high voltage frequency converter group control system self-carrying and short, be not convenient for daily patrolling and examining and overhaul the maintenance, and the interference killing feature poor leads to converter tripping operation scheduling problem.
In order to achieve the above object, the technical solution of the present invention is:
this adopt big-and-middle-sized high-voltage inverter group control system of external UPS power supply, its special is in:
the system comprises a large and medium high-voltage frequency converter group, a load distribution cabinet and an external UPS power supply unit;
the large and medium-sized high-voltage frequency converter group comprises a plurality of large and medium-sized high-voltage frequency converters which respectively supply power to all equipment of one generator set;
the external UPS power supply unit comprises a UPS power supply cabinet and a bypass voltage stabilizing cabinet; the UPS power cabinet provides AC main input for the load distribution cabinet; the bypass voltage stabilizing cabinet provides a direct current standby input and a bypass standby input for the UPS cabinet;
the load distribution cabinet comprises a load master switch and miniature circuit breakers with selective protection, wherein the miniature circuit breakers are in one-to-one correspondence with the control power supplies of the large and medium high-voltage frequency converters;
the output end of the external UPS power supply unit is connected with one end of a load main switch, the other end of the load main switch is connected with the input end of each miniature circuit breaker with selective protection, and the output end of each miniature circuit breaker with selective protection is respectively connected with the control power supply of the large and medium high-voltage frequency converter corresponding to the output end of the miniature circuit breaker with selective protection.
Furthermore, the UPS power cabinet is supplied with power by a 380V alternating current power supply A section, and an alternating current main input is supplied to the load distribution cabinet through a first connecting terminal, a main power switch, a first isolation transformer, a rectifying element, a first reactor, an inverter, a second reactor, a second isolation transformer, an inverter output fuse, a UPS output switch and a second connecting terminal in sequence.
Further, a direct current standby power supply in the bypass voltage stabilizing cabinet is supplied with power by a 220V direct current power supply, and the direct current standby input is connected to the input end of an inverter of the UPS power supply cabinet circuit through a first direct current wiring terminal, a second direct current wiring terminal, a direct current input switch, a diode, a third direct current wiring terminal and a direct current reactor in sequence.
Furthermore, a bypass standby power supply in the bypass voltage stabilizing cabinet is supplied with power by a 380V alternating current power supply B section, a bypass standby input is transmitted to the power supply side of a static switch of the UPS power supply cabinet through a wiring terminal, a bypass power supply switch, an alternating current isolation transformer, an automatic voltage regulating transformer, a bypass output switch, a second alternating current wiring terminal, a third alternating current wiring terminal, an alternating current UPS output switch and a static bypass output fuse in sequence, and a mode selection switch of the voltage stabilizer is in an 'automatic' position.
Furthermore, the external UPS power supply unit adopts a PEW-1060-220/220-EN type UPS power supply system to supply power.
The utility model has the advantages that:
1. the utility model discloses a large-and-medium-sized high-voltage inverter group control system can guarantee to be in the electric wire netting unusual if the power failure, it is undervoltage, for the incessant reserve alternating current power supply that provides of electrical load under the circumstances such as interference or surge, at protection computer data, guarantee the stability of grid voltage and frequency, improve the electric wire netting quality, and prevent that instantaneous power failure and accident from stopping the electricity and can play very important effect to the aspect such as the user causes harm, the little life weak point of UPS power capacity of having avoided high-voltage inverter from the area, and the not enough scheduling problem of reserve battery time.
2. The utility model discloses a large and medium-sized high voltage inverter group control system is convenient for maintain when daily patrolling and examining.
3. The large and medium-sized high-voltage frequency converter group control system of the utility model has reliable and stable operation performance, and when the rectifier of the UPS power cabinet fails, the UPS direct current standby power supply can supply power for operation; when the UPS inverter fails, the UPS alternating current standby power supply is powered by the static bypass switch to operate; the UPS device is overhauled, and an UPS alternating current standby power supply is powered and operated by an overhauling (manual) bypass; the system improves the reliability of a load power supply system, and can ensure the reliable stability of power supply when the frequency converter breaks down suddenly.
4. The external UPS power supply unit is secondarily distributed to each frequency converter control power supply through the load distribution cabinet, and the UPS power supply distribution air switch adopts the miniature circuit breaker with selective protection, so that the problem of override trip caused by short circuit or grounding of single equipment is avoided, and the power supply stability of a power supply system is improved.
Drawings
FIG. 1 is a system diagram of an external UPS unit according to the present invention;
FIG. 2 is a wiring diagram before modification of a large and medium-sized high-voltage frequency converter group control system;
FIG. 3 is a wiring diagram of a control system of a large and medium high-voltage frequency converter group powered by an external UPS of the utility model;
FIG. 4 is a diagram of wiring within the load distribution cabinet.
The reference numbers are as follows:
TC 11-isolation transformer, ZH 11-pulse group suppressor, ZL 11-filter, XS11-UPS plug, GU 11-frequency converter UPS, XP 11-power plug, XS 12-standby socket, 1 DK-load total switch, 1 DZ-first miniature circuit breaker, 2 DZ-second miniature circuit breaker and 3 DZ-third miniature circuit breaker.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
the utility model discloses a large and medium-sized high-voltage frequency converter group control system adopting an external UPS power supply to supply power, which comprises a large and medium-sized high-voltage frequency converter group, a load distribution cabinet and an external UPS power supply unit;
the large and medium high-voltage frequency converter group comprises a plurality of large and medium high-voltage frequency converters, and the large and medium high-voltage frequency converters respectively supply power to all equipment connected with one generator set;
the external UPS power supply unit adopts a PEW-1060-220/220-EN type UPS power supply system to supply power.
The external UPS power supply unit comprises a UPS power supply cabinet and a bypass voltage stabilizing cabinet; the UPS power cabinet provides AC main input for the load distribution cabinet; the bypass voltage stabilizing cabinet provides a direct current standby input and a bypass standby input for the UPS cabinet;
as shown in fig. 1, the UPS power cabinet is powered by a 380V ac power a, and supplies ac main input to the load distribution cabinet via a first connection terminal, a main power switch, a first isolation transformer, a rectifier element, a first reactor, an inverter, a second reactor, a second isolation transformer, an inverter output fuse, a UPS output switch, and a second connection terminal in sequence.
The direct current standby power supply in the bypass voltage stabilizing cabinet is supplied with power by a 220V direct current power supply, and the direct current standby input is connected to the input end of an inverter of the UPS power supply cabinet circuit through a first direct current wiring terminal, a second direct current wiring terminal, a direct current input switch, a diode, a third direct current wiring terminal and a direct current reactor in sequence. When the rectifier of the UPS power cabinet fails, the UPS direct current standby power supply can supply power to operate;
a bypass standby power supply in the bypass voltage stabilizing cabinet is supplied with power by a 380V alternating current power supply B section, a bypass standby input is transmitted to a power supply side of a static switch of the UPS power supply cabinet through a wiring terminal, a bypass power supply switch, an alternating current isolation transformer, an automatic voltage regulating transformer, a bypass output switch, a second alternating current wiring terminal, a third alternating current wiring terminal, an alternating current UPS output switch and a static bypass output fuse in sequence, and a mode selection switch of the voltage stabilizer is in an 'automatic' position. When the UPS inverter fails, the UPS alternating current standby power supply is powered by the static bypass switch to operate; and (4) overhauling the UPS device, wherein the UPS alternating current standby power supply is powered and operated by an overhauling (manual) bypass.
As shown in fig. 4, the load distribution cabinet includes a load master switch 1DK, and micro circuit breakers with selective protection, including a first micro circuit breaker 1DZ, a second micro circuit breaker 2DZ, and a third micro circuit breaker 3 DZ.
As shown in fig. 2 and fig. 3, the output end of the external UPS power supply unit is connected to one end of a load main switch 1DK, the other end of the load main switch 1DK is connected to the input ends of a first miniature circuit breaker 1DZ, a second miniature circuit breaker 2DZ and a third miniature circuit breaker 3DZ, and the output ends of the first miniature circuit breaker 1DZ, the second miniature circuit breaker 2DZ and the third miniature circuit breaker 3DZ are respectively connected to the control power supply of the corresponding large and medium high voltage inverter.
Through tests, the large and medium high-voltage frequency converter group control system powered by the external UPS power supply unit is adopted, the operation condition of the frequency converter is good, the fault rate is zero, the hidden trouble of equipment shutdown caused by power failure of the control power supply is eliminated from the source, the maintenance cost is greatly reduced, the operation efficiency is improved, and the safe and stable operation of the unit is ensured.
The above is only the embodiment of the present invention, and is not the limitation of the protection scope of the present invention, all the equivalent structure changes made in the contents of the specification and the drawings, or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (5)
1. Adopt big-and-middle-sized high voltage frequency converter group control system of external UPS power supply, its characterized in that:
the system comprises a large and medium high-voltage frequency converter group, a load distribution cabinet and an external UPS power supply unit;
the large and medium high-voltage frequency converter group comprises a plurality of large and medium high-voltage frequency converters which respectively supply power to all equipment of one generator set;
the external UPS power supply unit comprises a UPS power supply cabinet and a bypass voltage stabilizing cabinet; the UPS power cabinet provides AC main input for the load distribution cabinet; the bypass voltage stabilizing cabinet provides a direct current standby input and a bypass standby input for the UPS cabinet;
the load distribution cabinet comprises a load master switch and miniature circuit breakers with selective protection, wherein the miniature circuit breakers are in one-to-one correspondence with the control power supplies of the large and medium high-voltage frequency converters;
the output end of the external UPS power supply unit is connected with one end of a load main switch, the other end of the load main switch is connected with the input end of each miniature circuit breaker with selective protection, and the output end of each miniature circuit breaker with selective protection is respectively connected with the control power supply of the large and medium high-voltage frequency converter corresponding to the output end of the miniature circuit breaker with selective protection.
2. The large and medium sized high voltage inverter group control system powered by external UPS according to claim 1, characterized in that: the UPS power cabinet is supplied with power by a 380V alternating current power supply A section, and the alternating current main input is supplied to the load distribution cabinet through a first wiring terminal, a main power switch, a first isolation transformer, a rectifying element, a first reactor, an inverter, a second reactor, a second isolation transformer, an inverter output fuse, a UPS output switch and a second wiring terminal in sequence.
3. The large and medium sized high voltage inverter group control system powered by external UPS according to claim 2, characterized in that: the direct current standby power supply in the bypass voltage stabilizing cabinet is supplied with power by a 220V direct current power supply, and the direct current standby input is connected to the input end of an inverter of the UPS power supply cabinet circuit through a first direct current wiring terminal, a second direct current wiring terminal, a direct current input switch, a diode, a third direct current wiring terminal and a direct current reactor in sequence.
4. The large and medium sized high voltage inverter group control system powered by external UPS according to claim 3, characterized in that: a bypass standby power supply in the bypass voltage stabilizing cabinet is supplied with power by a 380V alternating current power supply B section, a bypass standby input is transmitted to a power supply side of a static switch of the UPS power supply cabinet through a wiring terminal, a bypass power supply switch, an alternating current isolation transformer, an automatic voltage regulating transformer, a bypass output switch, a second alternating current wiring terminal, a third alternating current wiring terminal, an alternating current UPS output switch and a static bypass output fuse in sequence, and a mode selection switch of the voltage stabilizer is in an 'automatic' position.
5. The large and medium-sized high-voltage frequency converter group control system powered by an external UPS according to claim 1 or 4, characterized in that: the external UPS power supply unit adopts a PEW-1060-220/220-EN type UPS power supply system to supply power.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920842296.XU CN210157071U (en) | 2019-06-05 | 2019-06-05 | Large and medium-sized high-voltage frequency converter group control system adopting external UPS power supply for power supply |
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| CN201920842296.XU CN210157071U (en) | 2019-06-05 | 2019-06-05 | Large and medium-sized high-voltage frequency converter group control system adopting external UPS power supply for power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112537648A (en) * | 2020-12-31 | 2021-03-23 | 盐城欢创科技有限公司 | Communication construction is with high-efficient conveyor of communication box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112537648A (en) * | 2020-12-31 | 2021-03-23 | 盐城欢创科技有限公司 | Communication construction is with high-efficient conveyor of communication box |
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