CN107785988A - The online detection and control device and method of ups power - Google Patents
The online detection and control device and method of ups power Download PDFInfo
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- CN107785988A CN107785988A CN201610792101.6A CN201610792101A CN107785988A CN 107785988 A CN107785988 A CN 107785988A CN 201610792101 A CN201610792101 A CN 201610792101A CN 107785988 A CN107785988 A CN 107785988A
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- 238000012544 monitoring process Methods 0.000 claims description 14
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- 230000001276 controlling effect Effects 0.000 description 23
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The invention provides a kind of online detection and control device and method of ups power, online detection and control device includes：Main control PLC, it is connected with ups power and bypass circulation, ups power and bypass circulation is controlled for obtaining the work state information of ups power, and according to the work state information of ups power；Ups power, input are connected with bypass circulation, electric power incoming line and main control PLC, and the first output end is connected with load, are load supplying in normal work for the control signal according to main control PLC；Bypass circulation, one end are connected with electric power incoming line, and the other end is connected with load, are load supplying when ups power is detection state/malfunction for the control signal according to main control PLC.Ups power online detection and control device and method provided by the invention, when ups power is detection state/malfunction, it is load supplying by bypass circulation, ensure that the reliability of running of wind generating set, effectively increases the practicality of online detection and control device.
Description
Technical Field
The embodiment of the invention relates to the technical field of detection of wind generating sets, in particular to an online detection control device and method of a UPS (uninterrupted power supply).
Background
The wind generating set is mostly installed in desert gobi with severe environment or other areas with rich wind resources; when a single unit is connected to a sub-grid, the voltage has the possibility of fluctuation and harmonic waves; in order to ensure that the internal electrical components of the unit are not affected by the voltage fluctuation and harmonic waves of the Power grid, the voltage stabilizing function of an Uninterruptible Power Supply (UPS) is often used to protect the internal electrical components.
The UPS power structures provided in the units in the prior art generally include: the UPS power supply and the PLC are connected with the UPS power supply, one end of the UPS power supply is connected with the input line, and the other end of the UPS power supply is connected with the wind turbine generator through the output line.
However, in the process of implementing the technical solution, the UPS power supply structure in the prior art is found to have the following defects: when the UPS fails, even if the power grid is electrified, the wind turbine generator set cannot obtain the electric energy in the power grid due to the damage of the UPS, so that the wind turbine generator set can only be shut down by a passive fault and is not beneficial to the normal operation of the wind turbine generator set.
Disclosure of Invention
The embodiment of the invention provides an online detection control device and method for a UPS (uninterrupted power supply), which can effectively solve the problem that in the prior art, when the UPS fails, a power grid is electrified, so that a unit can only be shut down passively, and the normal operation of the unit is not facilitated.
An aspect of an embodiment of the present invention provides an online detection control apparatus for a UPS power supply, including:
the master control PLC is connected with the UPS and the bypass loop and is used for acquiring the working state information of the UPS and controlling the UPS and the bypass loop according to the working state information of the UPS;
the input end of the UPS is connected with the bypass loop, the power inlet wire and the master control PLC, and the first output end of the UPS is connected with a load and used for supplying power to the load during normal work according to a control signal of the master control PLC;
and one end of the bypass loop is connected with the power inlet wire, and the other end of the bypass loop is connected with the load and used for supplying power to the load when the UPS is in a detection state/fault state according to the control signal of the master control PLC.
The invention also provides an online detection control method of the UPS power supply, which comprises the following steps:
acquiring working state information of the UPS;
when the UPS works normally, the UPS is controlled to supply power to a load;
and when the UPS power supply is in a detection state/fault state, controlling the bypass loop to supply power to the load.
According to the UPS online detection control device and method provided by the invention, the bypass loop connected with the UPS is arranged, and the UPS can effectively supply power to the load through the UPS when the UPS works normally through the control of the master control PLC; when the UPS power supply is in a detection state/fault state, the bypass loop supplies power to the load, so that the defect that the unit can only be shut down passively when the UPS power supply is in the fault state in the prior art is effectively overcome, the stability and the reliability of the operation of the wind turbine generator are ensured, the practicability of the online detection control device is effectively improved, and the popularization and the application of the market are facilitated.
Drawings
Fig. 1 is a first schematic structural diagram of an online detection control apparatus for a UPS power supply according to an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of an online detection control apparatus of a UPS power supply according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating an online detection control method for a UPS power supply according to an embodiment of the present invention;
fig. 4 is a schematic flow chart illustrating a process of controlling the bypass circuit to supply power to the load according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a process for controlling the UPS power source to supply power to a load according to an embodiment of the present invention;
fig. 6 is a schematic flow chart illustrating a process of controlling connection/disconnection between the UPS power source and the load according to an embodiment of the present invention;
fig. 7 is a schematic flowchart of a process of determining a detection result of the UPS power source according to the voltage information according to an embodiment of the present invention.
In the figure, the position of the upper end of the main shaft,
1. a master control PLC; 2. A UPS power supply;
201. an input end; 202. A first output terminal;
203. a second output terminal; 204. A third output terminal;
3. a bypass loop; 301. A bypass circuit breaker;
302. a voltage regulator; 4. An incoming line loop relay;
5. a power supply circuit breaker; 6. A circuit breaking controller;
601. an incoming line loop relay; 602. An output breaker;
7. a load; 8. An incoming line protection circuit breaker;
9. a load protection circuit breaker; 10. Leading a power supply into a wire;
11. a voltage collector; 12. A discharge loop;
1201. a discharge resistor; 1202. A current transformer;
1203. a discharge circuit breaker; 1204. A fast fuse;
1205. a feedback contact; 1206. An intermediate relay.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Fig. 1 is a first schematic structural diagram of an online detection control apparatus of a UPS power supply 2 according to an embodiment of the present invention; as can be seen from fig. 1, the present embodiment provides an online detection control apparatus for a UPS power supply 2, including:
the master control PLC1 is connected with the UPS 2 and the bypass circuit 3, and is used for acquiring the working state information of the UPS 2 and controlling the UPS 2 and the bypass circuit 3 according to the working state information of the UPS 2;
the master control PLC1 is a master control PLC1 in the wind generating set, can read and detect all data in the online detection and control device, and can send the read data through a data network of the fan, so that remote detection, monitoring, remote manual operation and the like can be realized; in addition, the master PLC1 may be connected to the UPS power source 2 through one or two feedback signal loops, so that the master PLC1 may obtain the operating state information of the UPS power source 2 through the feedback signal loops.
An input end 201 of the UPS power supply 2 is connected with the bypass circuit 3, the power inlet line 10 and the master control PLC1, and a first output end 202 is connected with the load 7 and used for supplying power to the load 7 during normal operation according to a control signal of the master control PLC 1;
it should be noted that the load 7 in this embodiment may be a fan in a wind turbine generator system, or may be another device that consumes energy; when the input end 201 is connected with the power inlet 10, in order to improve the working stability and reliability of the online detection control device, an inlet protection circuit breaker 8 may be arranged between the input end 201 and the power inlet 10, and/or a load protection circuit breaker 9 may be arranged between the first output end 202 and the load 7, so as to effectively protect the input line and the output line of the UPS power supply 2; when the master PLC1 obtains the operating state of the UPS power supply 2, it may send a control signal to the UPS power supply 2 according to a preset control policy, for example, so that the UPS power supply 2 may supply power to the load 7 according to the control signal.
And one end of the bypass loop 3 is connected with the power inlet wire 10, and the other end of the bypass loop is connected with the load 7, and the bypass loop is used for supplying power to the load 7 when the UPS power supply 2 is in a detection state/fault state according to a control signal of the master control PLC 1.
In the process of using the UPS power supply 2, the working state of the UPS power supply 2 may be detected periodically, at this time, the UPS power supply 2 needs to be set to a detection state, specifically, the detection process of the UPS power supply 2 in the detection state is not limited, and preferably, relevant parameter information (including current information, voltage information, impedance information, or the like) of the UPS power supply 2 needs to be acquired, and the acquired parameter information needs to be analyzed to determine a detection result of the UPS power supply 2; in addition, during the use of the UPS power supply 2, the UPS power supply 2 may not be able to normally supply power to the load 7 for internal reasons, and the UPS power supply 2 is in a failure state at this time, but of course, the failure state of the UPS power supply 2 is not limited to the above.
The online detection control device for the UPS power supply 2 provided by this embodiment can effectively realize that the load 7 is supplied with power by the UPS power supply 2 when the UPS power supply 2 works normally, through the control of the master control PLC1 by the bypass circuit 3 connected to the UPS power supply 2; when the UPS power supply 2 is in a detection state/fault state, the bypass loop 3 supplies power to the load 7, so that the defect that the unit can only be shut down passively when the UPS power supply 2 is in the fault state in the prior art is effectively overcome, the stability and the reliability of the operation of the wind turbine generator are ensured, the practicability of the online detection control device is effectively improved, and the popularization and the application of the market are facilitated.
On the basis of the above embodiment, with continued reference to fig. 1, further, the bypass circuit 3 may be configured to include:
the bypass breaker 301 is arranged between the power inlet line 10 and the voltage stabilizer 302 and is used for controlling the power inlet line 10 to be disconnected with the voltage stabilizer 302 when the UPS (uninterrupted power supply) 2 works normally; or, when the UPS power supply 2 is in the detection state/fault state, the power inlet line 10 is controlled to be communicated with the voltage stabilizer 302;
and a voltage regulator 302 connected to the load 7 for outputting a regulated voltage.
Wherein, stabiliser 302 can be 230VAC stabiliser 302, and this stabiliser 302 is connected with power inlet wire 10 through bypass circuit breaker 301, when communicating between bypass circuit breaker 301 control power inlet wire 10 and stabiliser 302, makes power inlet wire 10, stabiliser 302 and load 7 be linked together for stabiliser 302 can replace UPS 2 to export steady voltage to load 7, realizes carrying out the effect of supplying power for load 7, also makes the bypass power supply quality that load 7 obtained simultaneously obtain guaranteeing.
On the basis of the foregoing embodiment, as can be seen with reference to fig. 1, further, in order to facilitate the master PLC1 to effectively control the UPS power supply 2, the online detection control apparatus is further configured to further include:
the incoming line loop relay 4 is arranged between the power supply circuit breaker 5 and the master control PLC1 and is used for controlling the power supply circuit breaker 5 according to a control signal of the master control PLC 1;
the power supply breaker 5 is arranged between the power inlet line 10 and the UPS 2, the power supply breaker 5 and the bypass breaker 301 are arranged in a correlated mode, and used for controlling a control signal of the PLC1 and controlling the power inlet line 10 to be communicated with the input end 201 when the UPS 2 works normally; alternatively, when the UPS power supply 2 is in the detection state/fault state, the control power inlet 10 is disconnected from the input terminal 201.
When the master control PLC1 confirms that the UPS power supply 2 is working normally, the power inlet line 10 is controlled to be connected to the input terminal 201, and at this time, the bypass breaker 301 controls the power inlet line 10 to be disconnected from the voltage stabilizer 302 in order to reduce the loss of electric energy; when the master control PLC1 confirms that the UPS power supply 2 is in the detection state/fault state, the power inlet line 10 is controlled to be disconnected from the input terminal 201, and at this time, in order to achieve the effect that the bypass circuit 3 supplies power to the load 7, the bypass circuit breaker 301 controls the power inlet line 10 to be communicated with the voltage stabilizer 302, so that when a line of the UPS power supply 2 and a line of the bypass circuit 3 are in the same time, one line is in the on state, and the other line is in the off state; in order to conveniently realize the process, the bypass circuit breaker 301 and the power supply circuit breaker 5 can be in a linkage state, the control difficulty of the master control PLC1 can be effectively reduced, and meanwhile, the use stability and reliability of the online detection control device are improved.
Further, when the UPS power supply 2 is in the detection state/failure state, in order to avoid the UPS power supply 2 from affecting normal operations of other components in the circuit, the online detection control apparatus is configured to further include:
the disconnection controller 6 is disposed between the UPS power source 2 and the load 7, connected to the master PLC1, and configured to control connection/disconnection between the first output terminal 202 and the load 7 according to a control signal of the master PLC 1.
To improve the accuracy of the master PLC1 in controlling the circuit break controller 6, the circuit break controller 6 may be preferably configured to include:
the incoming line loop relay 601 is arranged between the output circuit breaker 602 and the master control PLC1 and is used for controlling the output circuit breaker 602 according to a control signal of the master control PLC 1;
the output breaker 602 is arranged between the first output end 202 and the load 7, and is used for controlling the communication between the first output end 202 and the load 7 when the UPS power supply 2 works normally according to a control signal of the master control PLC 1; or to control the disconnection of the first output 202 from the load 7 when the UPS power supply 2 is in the detection state/fault state.
Fig. 2 is a second schematic structural diagram of an online detection control apparatus of a UPS power supply 2 according to an embodiment of the present invention; on the basis of the above embodiment, as can be seen by referring to fig. 2, when the UPS power supply 2 needs to be detected, in order to implement the detection operation, the online detection control device is configured to further include:
and the discharging loop 12 is connected to the third output terminal 204 of the UPS power supply 2 and the master control PLC1, and is configured to perform discharging detection on the UPS power supply 2 when the control power inlet line 10 is disconnected from the input terminal 201 and the first output terminal 202 is disconnected from the load 7.
The specific structure of the discharge loop 12 is not limited, and preferably, the discharge loop 12 may be configured to include:
one end of the discharge circuit breaker 1203 is connected with the third output end 204, and the other end of the discharge circuit breaker 1203 is connected with the master control PLC1 through the intermediate relay 1206, and is used for controlling the on/off of the discharge circuit 12 according to a control signal of the master control PLC 1;
one end of the current transformer 1202 is connected with the discharge circuit breaker 1203, and the other end of the current transformer is connected with the master control PLC1 and used for collecting discharge current;
and the discharge resistor 1201 is connected with the current transformer 1202 and used for consuming electric energy so as to realize a discharge detection operation of the UPS power supply 2.
When the discharging operation is performed, firstly, the main control PLC1 controls the discharging circuit 12 to be opened through the discharging circuit breaker 1203, the discharging circuit 12 includes a discharging resistor 1201, the discharging resistor 1201 is used as an energy consumption element, the electric energy of the UPS power supply 2 can be quickly consumed, further, the discharging current collected by the current transformer 1202 gradually changes along with the consumption of energy, when the collected discharging current is smaller than a preset discharging current threshold value, the completion of the discharging operation on the UPS power supply 2 can be confirmed, at this time, the main control PLC1 can control the discharging circuit 12 to be closed through the discharging circuit device, and the discharging operation on the UPS power supply 2 is finished; of course, those skilled in the art may also adopt other ways to perform the discharging operation on the UPS power source 2.
Through the discharge loop 12 that sets up, it is concrete, consume the electric energy of UPS power 2 through this resistance 1201 that discharges to discharge loop 12 through discharge circuit breaker 1203 and open and close, can conveniently, realize the operation of discharging to UPS power 2 fast, further improved this on-line measuring controlling means's practicality.
On the basis of the above embodiment, as can be seen with continued reference to fig. 2, in order to improve the stability and reliability of the discharge operation performed by the discharge circuit 12 when the discharge operation is performed by the discharge circuit 12, the discharge circuit 12 is configured to further include:
a fast fuse 1204, disposed between the discharge breaker 1203 and the current transformer 1202, for protecting the discharge circuit;
and a feedback contact 1205 with one end connected to the current transformer 1202 and the other end connected to the master PLC1, for sending the operating state information of the fast fuse 1204 to the master PLC 1.
The fast fuse 1204 is a fuse, and in the process of discharging in the discharging loop 12, under certain circumstances, a large overload current may occur in the discharging loop 12, and because the overload capacity of the power device is very low, the power device can only bear the large overload current in a very short time, therefore, the protection of the discharging loop 12 can be effectively realized through the arranged fast fuse 1204, thereby improving the stability and reliability of the use of the discharging loop 12, and further improving the practicability of the online detection control device.
On the basis of the above embodiment, as can be seen with continued reference to fig. 2, in addition, in order to more accurately obtain the operating state of the UPS power supply 2, the online detection control device is configured to further include:
and the voltage collector 11 has one end connected to the second output end 203 of the UPS power supply 2 and the other end connected to the master control PLC1, and is configured to collect voltage information of the UPS power supply 2 and send the collected voltage information to the master control PLC 1.
The voltage information of the UPS power supply 2 is obtained through the voltage collector 11, and the collected voltage information is sent to the master control PLC1, after the master control PLC1 analyzes and judges the voltage information, the working state of the UPS power supply 2 can be accurately obtained, for example, when the voltage information is within a preset first voltage threshold range, the UPS power supply 2 is determined to be in a normal working state; or, if the voltage information is within a preset second voltage threshold range, performing online monitoring on the UPS power supply 2 within a preset time period, and determining the working state of the UPS power supply 2 according to the monitoring result, where the second voltage threshold range is smaller than the first voltage threshold range; or, if the voltage information is within the preset third voltage threshold range, it is determined that the UPS power supply 2 is in a fault state, the bypass loop is started to supply power to the load 7, and a warning message is sent to the user; and then realized effectively that voltage collector 11 through setting up can make master control PLC1 stable, obtain UPS power 2's operating condition information effectively, conveniently carry out effective control to other parts in the circuit, further improved the accuracy and the reliability that this on-line measuring controlling means used, be favorable to the popularization and the application in market.
Fig. 3 is a flowchart illustrating an online detection control method for a UPS power supply according to an embodiment of the present invention, and referring to fig. 3, an execution device of the online detection control method may be an online detection control device for the UPS power supply or a master PLC, where the online detection device may be integrated in the master PLC; specifically, the control method comprises the following steps:
s101: acquiring working state information of the UPS;
the working state information of the UPS power supply may include a normal working state, a working state to be monitored, a detection state, a fault state, and the like, and the specific working state information may be set according to a user requirement; the specific working state information of the UPS power source can be obtained by obtaining a voltage parameter, a current parameter or an impedance parameter of the UPS power source.
S102: when the UPS works normally, the UPS is controlled to supply power to the load;
when the UPS power supply is confirmed to work normally, the input end of the UPS power supply may be connected to the power inlet line, and the output end of the UPS power supply may be connected to the load, so as to implement the operation of supplying power to the load by the UPS power supply, which is specifically shown in fig. 1.
S103: and when the UPS power supply is in a detection state/fault state, the bypass loop is controlled to supply power to the load.
When the UPS power supply is determined to be in the detection state/fault state, in order to ensure that the load does not have a passive fault shutdown, the bypass circuit is controlled to supply power to the load, specifically referring to fig. 1, one end of the bypass circuit is communicated with the power inlet wire, and the other end of the bypass circuit is communicated with the load, so as to implement the operation of supplying power to the load.
In the online detection control method for the UPS power supply provided by this embodiment, the UPS power supply is controlled to supply power to the load when the UPS power supply normally operates, and the bypass circuit is controlled to supply power to the load when the UPS power supply is in the detection state/failure state; the method effectively ensures that the load can normally work under any condition, further overcomes the defect that the unit can only be shut down passively when the UPS fails, ensures the stable reliability of the operation of the wind turbine generator, further effectively improves the practicability of the online detection control method, and is beneficial to popularization and application in the market.
Fig. 4 is a schematic flow chart of controlling a bypass circuit to supply power to a load according to an embodiment of the present invention, and based on the above embodiment, with reference to fig. 4, it can be seen that, when the bypass circuit is configured to include a voltage regulator and a bypass breaker, the controlling the bypass circuit to supply power to the load specifically includes:
s1031: the bypass breaker controls the communication between the power inlet wire and the voltage stabilizer;
s1032: and controlling the voltage stabilizer to be communicated with the load and outputting stable voltage to the load through the voltage stabilizer.
The stabiliser is connected with the power inlet wire through bypass circuit breaker, and under bypass circuit breaker's control, intercommunication between power inlet wire and the stabiliser, simultaneously because the stabiliser is connected with the load, and then make power inlet wire, stabiliser and load be linked together, and the stabiliser at this moment can replace the UPS power to export the steady voltage to the load, realizes carrying out the effect of supplying power for the load.
Fig. 5 is a schematic diagram of a process for controlling a UPS power supply to supply power to a load according to an embodiment of the present invention; on the basis of the foregoing embodiment, as can be seen with reference to fig. 5, the controlling the UPS power supply to supply power to the load in this embodiment is specifically configured to include:
s1021: the incoming line of the power supply is controlled to be communicated with the UPS power supply, and the UPS power supply is controlled to be communicated with the load, so that the UPS power supply supplies power to the load.
When the incoming line of the control power supply is communicated with the UPS power supply, specifically, the input end of the UPS power supply is connected with the incoming line of the power supply, specifically, as shown in fig. 1, in order to improve the stability and reliability of the circuit operation, an incoming line protection circuit breaker may be arranged between the input end and the incoming line of the power supply, and the communication between the UPS power supply and the load is controlled, specifically, the output end of the UPS power supply is communicated with the load, and in order to further improve the stability and reliability of the circuit operation, a load protection circuit breaker may be further arranged between the output end and the load, so as to effectively protect the input line and the output line of the UPS power; therefore, the stability and the reliability of power supply for the load when the UPS works normally are effectively improved, and the stability and the reliability of the online detection control method are further improved.
Fig. 6 is a schematic flowchart of a process for controlling connection/disconnection between a UPS power source and a load according to an embodiment of the present invention, and as can be seen from fig. 6, after obtaining operating status information of the UPS power source, the method is further configured to further include:
s104: when the UPS works normally, the UPS is controlled to be communicated with the load; or,
s105: and when the UPS is in a detection state/fault state, the UPS is controlled to be disconnected with the load, and the discharge detection is carried out on the UPS.
When the UPS is in a detection state, the UPS is controlled to be disconnected with the load, and the embodiment shows that at the moment, the UPS can be disconnected with the power inlet wire, so that the UPS is completely disconnected, at the moment, the UPS is subjected to discharge detection, the accuracy of a detection result can be ensured, and the accuracy and the reliability of the on-line detection control method of the UPS are further improved.
It should be noted that step S102 and step S104 are not performed in the same order, i.e., step S102 may be performed before or after step S104; preferably, the step S104 may be arranged after the step S102, that is, after the bypass circuit is connected to the power inlet line, the connection between the UPS power source and the load is disconnected; similarly, step S103 is not performed in the same order as step S105.
Fig. 7 is a schematic flow chart illustrating a process of determining a detection result of a UPS power source according to voltage information according to an embodiment of the present invention, and it can be seen with reference to fig. 7 that after the UPS power source is detected to be discharged, an operating state of the UPS power source at that time needs to be accurately obtained, and therefore, the method is further configured to:
s201: acquiring voltage information of the UPS within a preset time period;
the voltage information of the UPS can be acquired by a voltage sensor, and specifically, the voltage acquisition device can be connected with the UPS so as to acquire the voltage information of the UPS; in addition, technical personnel in the field can also set a collection period, namely, the UPS power supply is detected according to the preset period, so that the UPS power supply is timely adjusted and maintained according to the detection result of the UPS power supply, and the use stability and reliability of the UPS power supply are further improved.
S202: and confirming the working state of the UPS according to the voltage information.
The specific implementation process of determining the working state of the UPS power supply according to the voltage information is not limited, and preferably, the determining the working state of the UPS power supply according to the voltage information specifically includes:
s2021: if the voltage information is within a preset first voltage threshold range, confirming that the UPS power supply is in a normal working state; or,
the first voltage threshold range is preset, the specific value interval of the first voltage threshold range can be set according to the working experience of technicians, and when the voltage information is within the first power supply threshold range, the UPS at the moment is in a normal working state.
For example, assuming a normal voltage value, the first power threshold range is set to be n% times of the normal voltage value, if the collected voltage information is higher than n% times of the normal voltage value in the preset time period, it indicates that the voltage information is in the first voltage threshold range, and it can be determined that the UPS power source is in a normal operating state, and at this time, the UPS power source may be periodically subjected to a discharge detection operation according to the set time.
S2022: if the voltage information is within a preset second voltage threshold range, carrying out online monitoring on the UPS within a preset time period, and confirming the working state of the UPS according to a monitoring result, wherein the second voltage threshold range is smaller than the first voltage threshold range; or,
the second voltage threshold range is preset, and the specific value interval of the second voltage threshold range may be set according to the working experience of a technician, for example, when the obtained voltage information is lower than n% times of the normal voltage value, but higher than m% times of the normal voltage value, and the voltage information at this time is within the second power threshold range, it indicates that the working state of the UPS power at this time is unstable, in order to accurately obtain the working state of the UPS power, the UPS power at this time is set to the monitoring state, specifically, by setting a monitoring time period, the UPS power is continuously monitored in the monitoring time period, the monitoring result of the UPS power is obtained, and the working state of the UPS power can be accurately determined according to the monitoring result, for example: if the voltage information of the UPS meets the first voltage threshold range, the UPS enters a normal working state, and the UPS can exit from a monitoring state with energy.
S2023: and if the voltage information is within a preset third voltage threshold range, confirming that the UPS is in a fault state, starting a bypass loop to supply power to the load, and sending warning information to a user, wherein the third voltage threshold range is smaller than the second voltage threshold range.
The third voltage threshold range is preset, and a specific value interval of the third voltage threshold range may be set according to work experience of a technician, for example, when the obtained voltage information is lower than m% times of a normal voltage value, the voltage information at this time is within the third power threshold range, which indicates that the UPS power at this time is in a fault state, in order to ensure normal operation of the wind turbine, the bypass loop is started to supply power to the load, and meanwhile, the warning information is sent to the user, and the warning information may be sent to a mobile phone and a mailbox address of the user through WiFi or bluetooth, or may be displayed through a warning device preset in the circuit system, for example: the LED lamp flashes, the buzzer buzzes to remind the detection personnel or the maintenance personnel to start a fault strategy, such as replacing or maintaining the UPS power supply, and the like.
The online detection control method for the UPS power supply provided by the embodiment can effectively confirm the working state of the UPS power supply, and can start the bypass loop to supply power to the load when the UPS power supply fails, so that the normal operation of the wind turbine generator set is ensured, the practicability of the online detection control method is further improved, and the online detection control method is favorable for popularization and application in the market.
In specific application, a logic program for controlling the UPS and the discharge loop is stored in the master control PLC, and the logic program can specifically comprise; when the detected voltage of the UPS reaches a trigger condition, a bypass loop is connected and discharge detection is carried out; if the detected voltage of the UPS is always normal, the UPS can be normally maintained and discharged according to the preset interval fixed time; when the discharge of the UPS is detected each time, the discharge is detected once, so that a user can know the working state information of the UPS.
In addition to determining the operating state of the UPS power source according to the voltage information, those skilled in the art may also determine the operating state of the UPS power source in other manners, for example, calculating the power storage capacity of the UPS power source according to the detected time period of the decrease of the discharging current of the UPS power source; meanwhile, the voltage information of the UPS is synthesized for comparison, and the resistance of the UPS is calculated, so that the quality of the UPS is judged according to the resistance.
It should be noted that, for the online detection control device, the online detection control device may include three parts, namely a bypass circuit, a discharge circuit, and a voltage collector, wherein the bypass circuit, the discharge circuit, and the voltage collector are three independent circuits, and therefore, only one of the three parts, namely the bypass circuit, may be selected for independent use; any two parts can be selected to be matched for use, and the online monitoring control device is set to comprise the three structures, which is the best implementation mode of the technical scheme.
The online detection control device of the UPS power supply provided by the technical scheme can realize online detection and maintenance operation of the UPS power supply, can also embody the working state of the pre-known UPS power supply according to the parameter information of the UPS power supply, and when the failure or the fault of the UPS power supply is determined, the bypass loop is started to supply power for the load, so that the failure shutdown time caused by the failure of the UPS power supply is reduced, the availability of a unit is effectively improved, the practicability of the online detection control device is further improved, and the online detection control device is favorable for popularization and application in the market.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
It is obvious to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working process of the device described above, reference may be made to the corresponding process in the foregoing method embodiment, which is not described herein again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (15)
1. An online detection control device of a UPS power supply is characterized by comprising:
the master control PLC is connected with the UPS and the bypass loop and is used for acquiring the working state information of the UPS and controlling the UPS and the bypass loop according to the working state information of the UPS;
the input end of the UPS is connected with the bypass loop, the power inlet wire and the master control PLC, and the first output end of the UPS is connected with a load and used for supplying power to the load during normal work according to a control signal of the master control PLC;
and one end of the bypass loop is connected with the power inlet wire, and the other end of the bypass loop is connected with the load and used for supplying power to the load when the UPS is in a detection state/fault state according to the control signal of the master control PLC.
2. The on-line detection control apparatus of a UPS power supply of claim 1, wherein the bypass circuit comprises:
the bypass breaker is arranged between the power inlet wire and the voltage stabilizer and is used for controlling the power inlet wire to be disconnected with the voltage stabilizer when the UPS works normally; or when the UPS is in a detection state/fault state, the power inlet line is controlled to be communicated with the voltage stabilizer;
and the voltage stabilizer is connected with the load and used for outputting stable voltage.
3. The on-line detection control apparatus of a UPS power supply according to claim 2, further comprising:
the incoming line loop relay is arranged between the power supply circuit breaker and the master control PLC and used for controlling the power supply circuit breaker according to a control signal of the master control PLC;
the power supply circuit breaker is arranged between the power inlet wire and the UPS, is arranged in association with the bypass circuit breaker, is used for controlling a control signal of the master control PLC, and controls the communication between the power inlet wire and the input end when the UPS works normally; or when the UPS power supply is in a detection state/fault state, the power supply inlet wire is controlled to be disconnected with the input end.
4. The on-line detection control apparatus of a UPS power supply according to claim 2, further comprising:
and the circuit breaking controller is arranged between the UPS and the load, is connected with the master control PLC and is used for controlling the connection/disconnection between the first output end and the load according to a control signal of the master control PLC.
5. The on-line detection control apparatus of a UPS power supply of claim 4, wherein said shutdown controller comprises:
the incoming line loop relay is arranged between the output circuit breaker and the master control PLC and used for controlling the output circuit breaker according to a control signal of the master control PLC;
the output breaker is arranged between the first output end and the load and used for controlling the first output end to be communicated with the load when the UPS works normally according to the control signal of the master control PLC; or, the controller is configured to control the first output terminal to be disconnected from the load when the UPS power supply is in a detection state/fault state.
6. The on-line detection control apparatus of a UPS power supply according to claim 5, further comprising:
and the discharging loop is connected with the third output end of the UPS and the master control PLC and used for controlling the power inlet wire to be disconnected with the input end and the first output end to be disconnected with the load, and then the UPS performs discharging detection.
7. The on-line detection control apparatus of a UPS power supply of claim 6, wherein the discharging loop comprises:
one end of the discharge circuit breaker is connected with the third output end, and the other end of the discharge circuit breaker is connected with the master control PLC through an intermediate relay and used for controlling the opening/closing of a discharge circuit according to a control signal of the master control PLC;
one end of the current transformer is connected with the discharge circuit breaker, and the other end of the current transformer is connected with the master control PLC and used for collecting discharge current;
and the discharge resistor is connected with the current transformer and used for consuming electric energy so as to realize the discharge detection operation of the UPS power supply.
8. The on-line detection control apparatus of a UPS power supply of claim 7, wherein the discharging loop further comprises:
the quick fuse is arranged between the discharge circuit breaker and the current transformer and used for protecting a discharge circuit;
and one end of the feedback contact is connected with the current transformer, and the other end of the feedback contact is connected with the master control PLC and used for sending the working state information of the fast fuse to the master control PLC.
9. An on-line detection control apparatus for a UPS power supply according to any one of claims 1-8, further comprising:
and one end of the voltage collector is connected with the second output end of the UPS, and the other end of the voltage collector is connected with the master control PLC and used for collecting voltage information of the UPS and sending the collected voltage information to the master control PLC.
10. An online detection control method for a UPS power supply is characterized by comprising the following steps:
acquiring working state information of the UPS;
when the UPS works normally, the UPS is controlled to supply power to a load;
and when the UPS power supply is in a detection state/fault state, controlling the bypass loop to supply power to the load.
11. The method according to claim 10, wherein the bypass circuit includes a voltage regulator and a bypass breaker, and the step of controlling the bypass circuit to supply power to the load includes:
the bypass breaker is used for controlling the communication between the power inlet wire and the voltage stabilizer;
and controlling the voltage stabilizer to be communicated with the load, and outputting stable voltage to the load through the voltage stabilizer.
12. The method according to claim 10, wherein the controlling the UPS power supply to supply power to the load comprises:
and controlling the power inlet wire to be communicated with the UPS power supply and controlling the UPS power supply to be communicated with the load so as to realize that the UPS power supply supplies power for the load.
13. The method of claim 10, wherein after the obtaining the operating status information of the UPS power source, the method further comprises:
when the UPS works normally, the UPS is controlled to be communicated with the load; or,
and when the UPS power supply is in a detection state/fault state, controlling the UPS power supply to be disconnected with the load, and carrying out discharge detection on the UPS power supply.
14. The method of claim 13, wherein after detecting the discharge of the UPS power source, the method further comprises:
acquiring voltage information of the UPS within a preset time period;
and confirming the working state of the UPS according to the voltage information.
15. The method according to claim 14, wherein the determining the operating status of the UPS power supply according to the voltage information specifically comprises:
if the voltage information is within a preset first voltage threshold range, confirming that the UPS power supply is in a normal working state; or,
if the voltage information is within a preset second voltage threshold range, performing online monitoring on the UPS within a preset time period, and determining the working state of the UPS according to a monitoring result, wherein the second voltage threshold range is smaller than the first voltage threshold range; or,
and if the voltage information is within a preset third voltage threshold range, confirming that the UPS is in a fault state, starting the bypass loop to supply power to a load, and sending warning information to a user, wherein the third voltage threshold range is smaller than the second voltage threshold range.
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