CN108683251B - Unit monitoring circuit, method and control equipment of generator set - Google Patents
Unit monitoring circuit, method and control equipment of generator set Download PDFInfo
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- CN108683251B CN108683251B CN201810349221.8A CN201810349221A CN108683251B CN 108683251 B CN108683251 B CN 108683251B CN 201810349221 A CN201810349221 A CN 201810349221A CN 108683251 B CN108683251 B CN 108683251B
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- 230000001276 controlling effect Effects 0.000 claims abstract description 36
- 238000003860 storage Methods 0.000 claims description 35
- 239000003921 oil Substances 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 15
- 238000004891 communication Methods 0.000 description 12
- 238000010248 power generation Methods 0.000 description 5
- 230000000875 corresponding Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
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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
- H02J9/08—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 requiring starting of a prime-mover
Abstract
The application discloses unit monitoring circuit, method and controlgear of generating set, unit monitoring circuit includes: the device comprises a first switch, a second switch, a microprocessor, a first port and a second port; the first port is connected with the automatic change-over switch circuit; the second port is connected with the generating set controller; the automatic change-over switch circuit comprises a change-over switch; the first switch is a normally closed switch, and the second switch is a normally open switch; the switch is connected with the first port; two ends of the first switch are respectively connected with the first port and the second port; the second switch is connected between the microprocessor and the generating set controller; the automatic change-over switch circuit is used for controlling the change-over switch to be closed when the commercial power is cut off; and the microprocessor is used for controlling the first switch to be switched off and the second switch to be switched on to enable the generator set to be switched on to generate power when the commercial power is determined to be cut off. When the automatic switching circuit fails, the circuit can still reliably control the start and stop of the generator set, and can automatically realize start and stop control.
Description
Technical Field
The application relates to the technical field of power electronics, in particular to a unit monitoring circuit, a unit monitoring method and control equipment of a generator set.
Background
With the continuous development of communication technology, people can not communicate with each other in work and life, so that the uninterrupted power supply of communication equipment is more and more important, and particularly, the commercial power is easy to cut off in remote areas. When the commercial power is cut off, the uninterrupted power supply equipment needs to continuously supply power to the communication equipment, and the normal work of the communication equipment is ensured.
The power supply design of the existing communication equipment adopts a mixed power supply mode of commercial power and a generator set, when the commercial power is normal, the commercial power is used for directly supplying power, and when the commercial power is cut off, the generator set is used for supplying power. When the commercial power is recovered, the commercial power is switched to supply power, and the generator set stops working.
When the communication equipment is switched, an automatic switching switch circuit is arranged locally at the communication equipment at present, the power supply voltage of the mains supply can be monitored, whether the mains supply is powered off or not is judged according to the power supply voltage of the mains supply, and when the mains supply is powered off, the generator set is controlled to be started to work, so that the power is supplied to the communication equipment, and the uninterrupted power supply of the communication equipment is guaranteed.
However, only the automatic change-over switch circuit is used for monitoring, and the following defects exist in the process of controlling the starting and stopping of the generator set:
when the automatic change-over switch circuit breaks down, the generator set can not be reliably controlled to be started to supply power to the electric equipment when the mains supply fails.
Disclosure of Invention
The application provides a unit monitoring circuit, a method and control equipment of a generator set, which can reliably control the start and stop of the generator set when an automatic transfer switch circuit fails, and can automatically realize the start and stop control.
In a first aspect, a unit monitoring circuit of a power generating unit is provided, the unit monitoring circuit includes: the device comprises a first switch, a second switch, a microprocessor, a first port and a second port;
the first port is connected with an automatic change-over switch circuit of the generator set; the second port is connected with the generator set controller;
the automatic change-over switch circuit comprises a change-over switch;
the first switch is a normally closed switch, and the second switch is a normally open switch;
the switch is connected with the first port;
two ends of the first switch are respectively connected with the first port and the second port;
the second switch is connected between the microprocessor and the generator set controller;
the automatic change-over switch circuit is used for controlling the change-over switch to be closed when the commercial power is determined to be cut off;
and the microprocessor is used for controlling the first switch to be switched off and the second switch to be switched on when the commercial power is determined to be cut off, so that the generator set is started to generate power.
The unit monitoring circuit and the automatic change-over switch circuit work independently at the same time, and the first switch is a normally closed switch, and the second switch is a normally open switch, so that the unit monitoring circuit controls the starting and stopping of the generator set in a default working mode. When the automatic change-over switch circuit breaks down, the start and stop of the generator set controlled by the generator set monitoring circuit are not influenced. And then guarantee when the commercial power outage, the generating set supplies power for consumer. In addition, when the unit monitoring circuit fails, the automatic switching circuit can automatically switch to the automatic switching circuit to control the starting and stopping of the generator unit.
In a first possible implementation manner of the first aspect, when the unit monitoring circuit fails, the first switch is normally closed, and the second switch is normally open; and when the unit monitoring circuit is normal, the first switch is controlled to be switched off. Because the first switch is a normally closed switch, when the unit monitoring circuit fails, the first switch is recovered to a normally closed state, and the automatic switching circuit can control the generator unit to start and stop.
With reference to the first aspect and any one of the foregoing possible implementation manners, in a second possible implementation manner, the automatic transfer switching circuit further includes: a voltage detection circuit;
the voltage detection circuit is used for detecting the power supply voltage of the commercial power, and when the power supply voltage of the commercial power is judged to be lower than the preset voltage, the commercial power is determined to be powered off, otherwise, the commercial power is determined to be normally powered on.
When the mains supply is powered off, the output voltage of the power grid can be rapidly reduced, so that whether the mains supply is powered off or not can be judged by detecting the supply voltage of the mains supply. When the mains supply is powered off, the generator set needs to be started to supply power to the electric equipment.
With reference to the first aspect and any one of the foregoing possible implementation manners, in a third possible implementation manner, the first port includes the following two interfaces: a first interface and a second interface;
the first end of the first switch is connected with the first interface, and the second end of the first switch is connected with the second interface;
the first IO port of the microprocessor is connected with the first interface, and the second IO port of the microprocessor is connected with the second interface;
the microprocessor is used for detecting the state change of the first IO port and the second IO port to determine whether the mains supply is powered off;
the first end of the change-over switch is connected with the first interface, and the second end of the change-over switch is connected with the second interface.
The unit monitoring circuit can judge whether the mains supply is powered off or not by monitoring the level jump state of the first port. Because whether the commercial power cuts off the power supply can be detected when the automatic change-over switch circuit is normal, when cutting off the power supply, the automatic change-over switch circuit can control the change-over switch to close, because when the change-over switch was closed, first port has the level state change.
With reference to the first aspect and any one of the foregoing possible implementation manners, in a fourth possible implementation manner, the second port includes the following two interfaces: a third interface and a fourth interface;
a first end of the second switch is connected with the third interface, and a second end of the second switch is connected with the fourth interface;
a first IO port of the generator set controller is connected with the third interface, and a second IO port of the generator set controller is connected with the fourth interface;
a third IO port of the microprocessor is connected with the control end of the second switch;
the first switch comprises the following four terminals: a first end, a second end, a third end and a fourth end;
the first end of the first switch is connected with the first interface, the second end of the first switch is connected with the second interface, the third end of the first switch is connected with the third interface, and the fourth end of the first switch is connected with the fourth interface.
Every switch corresponds two wires in the unit monitoring circuit that this embodiment provided, can guarantee the degree of accuracy that signal detected like this, is applicable to the switch of each producer's production moreover, and this scheme has the commonality, implements the convenience.
With reference to the first aspect and any one of the foregoing possible implementation manners, in a fifth possible implementation manner, the microprocessor is further configured to control both the first switch and the second switch to be turned off when it is determined that the mains supply is normal, so as to stop the generator set.
With reference to the first aspect and any one of the foregoing possible implementation manners, in a sixth possible implementation manner, the unit monitoring circuit further includes: an antenna;
the microprocessor is also used for receiving a generator set stop instruction sent by a remote controller through the antenna, controlling the first switch to be switched off according to the generator set stop instruction and controlling the second switch to be switched off.
The unit monitoring circuit provided by this embodiment can communicate with the remote controller through the antenna, can receive a command of the remote controller, and can also report the working states of the commercial power and the generator set to the remote controller.
With reference to the first aspect and any one of the foregoing possible implementation manners, in a seventh possible implementation manner, the microprocessor is configured to control the first switch to be turned off and the second switch to be turned on when the commercial power is determined to be powered off, and specifically includes:
the microprocessor sends commercial power outage information to the remote controller through the antenna; the antenna is used for receiving a generator set starting instruction fed back by the remote controller, and the generator set is controlled to be started according to the generator set starting instruction.
With reference to the first aspect and any one of the foregoing possible implementation manners, in an eighth possible implementation manner, the microprocessor is further configured to send, when it is determined that the mains supply is normal, information that the mains supply resumes the power supply to the remote controller through the antenna; and the antenna is also used for controlling the generator set to stop working when receiving a generator set stop instruction fed back by the remote controller.
With reference to the first aspect and any one of the foregoing possible implementation manners, in a ninth possible implementation manner, the antenna and the remote controller communicate with each other through one of the following:
zigbee, Sub-1G, WIFI, and bluetooth.
With reference to the first aspect and any one of the foregoing possible implementation manners, in a tenth possible implementation manner, the generator set includes a storage battery;
the microcontroller is also used for obtaining the electric quantity of the storage battery; when the mains supply is determined to be powered off and the electric quantity of the storage battery is larger than the preset electric quantity, controlling the storage battery to supply power to the electric equipment; when the commercial power is determined to be powered off and the electric quantity of the storage battery is smaller than or equal to the preset electric quantity, the first switch is controlled to be switched off, and the second switch is controlled to be switched on so as to control the generator set to be switched on.
Because the generating cost of the generating set is higher, when the electric quantity of the storage battery is enough to meet the operation of the electric equipment, the electric quantity of the storage battery can be preferentially used.
With reference to the first aspect and any one of the foregoing possible implementation manners, in an eleventh possible implementation manner, the first switch and the second switch are any one of: relay, IGBT and silicon controlled rectifier.
In a second aspect, a control method for a generator set is applied to a generator set monitoring circuit of the generator set, and includes:
and when the mains supply is determined to be powered off, the change-over switch is controlled to be closed, the first switch is controlled to be disconnected, and the second switch is controlled to be closed, so that the generator set is started to generate power.
In a first possible implementation manner of the second aspect, the method further includes:
and when the mains supply is determined to be normal, controlling the first switch and the second switch to be disconnected so as to stop the generator set.
With reference to the second aspect and any one of the foregoing possible implementation manners, in a second possible implementation manner, before controlling the first switch to be opened and the second switch to be closed to enable the generator set to be turned on to generate power, the method further includes:
obtaining the electric quantity of the storage battery; when the mains supply is determined to be powered off and the electric quantity of the storage battery is larger than the preset electric quantity, controlling the storage battery to supply power to the load;
when the commercial power is determined to be powered off and the electric quantity of the storage battery is smaller than or equal to the preset electric quantity, the first switch is controlled to be switched off, and the second switch is controlled to be switched on so as to control the generator set to be switched on.
In a third aspect, a control device of an oil power generation machine is further provided, including a unit monitoring circuit of the generator set, further including: an automatic transfer switch circuit;
the generator set is any one of the following: the system comprises an oil engine generator set, a wind power generator set and a photovoltaic generator set.
The control equipment comprises an automatic change-over switch circuit 101 and a unit monitoring circuit 200, wherein the automatic change-over switch circuit and the unit monitoring circuit can work independently and simultaneously without mutual influence, and when one of the automatic change-over switch circuit and the unit monitoring circuit fails, the automatic change-over switch circuit can be automatically switched to work for the other automatic change-over switch circuit. When both are normal, the generator set monitoring circuit can preferentially control the start and stop of the generator set. Because the unit monitoring circuit is connected with the automatic change-over switch circuit, when the automatic change-over switch circuit breaks down, the start and stop of the generator set controlled by the unit monitoring circuit are not influenced. Because the first switch is the normally closed switch, the second switch is normally open switch, therefore acquiescence operating mode is by the opening and shutting of unit monitoring circuit control generating set. When the automatic change-over switch circuit breaks down, the start and stop of the generator set controlled by the generator set monitoring circuit are not influenced. And then guarantee when the commercial power outage, the generating set supplies power for consumer. In addition, when the unit monitoring circuit fails, the automatic switching circuit can automatically switch to the automatic switching circuit to control the starting and stopping of the generator unit.
In a first possible implementation manner of the third aspect, the automatic transfer switch circuit is further configured to control the transfer switch to be turned off when it is determined that the commercial power supply is normal.
With reference to the third aspect and any one of the foregoing possible implementation manners, in a second possible implementation manner, the method further includes: a remote controller;
the control equipment receives a generator set stopping instruction sent by a remote controller through the antenna, controls the first switch to be switched off according to the generator set stopping instruction, and controls the second switch to be switched off.
The generator set is any one of the following: the system comprises an oil engine generator set, a wind power generator set and a photovoltaic generator set.
The unit monitoring circuit can be arranged on one side of the automatic change-over switch circuit and also can be arranged on one side of the generator set, and can be specifically selected according to actual application scenes.
According to the technical scheme, the embodiment of the application has the following advantages:
this generating set's unit monitoring circuit includes: the device comprises a first switch, a second switch, a microprocessor, a first port and a second port; the unit monitoring circuit is connected with the automatic change-over switch circuit; the automatic change-over switch circuit comprises a change-over switch which is connected with the first port; the generating set controller is connected with the second port; the unit monitoring circuit includes: the first switch is a normally closed switch, and the second switch is a normally open switch; two ends of the first switch are respectively connected with the first port and the second port; the second switch is connected between the microprocessor and the generating set controller; the automatic change-over switch circuit is used for controlling the change-over switch to be closed when the commercial power is cut off; and the microprocessor is used for controlling the first switch to be switched off and the second switch to be switched on to enable the generator set to be switched on to generate power when the commercial power is determined to be cut off.
Under normal conditions, unit monitoring circuit and automatic transfer switch circuit independent work simultaneously, because first switch is the normally closed switch, the second switch is normally open switch, therefore acquiescence operating mode is opening by the opening and stopping of unit monitoring circuit control generating set. When the automatic change-over switch circuit breaks down, the start and stop of the generator set controlled by the generator set monitoring circuit are not influenced. And then guarantee when the commercial power outage, the generating set supplies power for consumer. In addition, when the unit monitoring circuit fails, the automatic switching circuit can automatically switch to the automatic switching circuit to control the starting and stopping of the generator unit.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of an automatic transfer switch circuit controlled generator set according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a unit monitoring circuit provided in an embodiment of the present application;
FIG. 3 is a schematic diagram of another monitoring circuit for a unit according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of another unit monitoring circuit provided in the embodiment of the present application;
FIG. 5 is a schematic diagram of another monitoring circuit of the present application;
fig. 6 is a schematic diagram of a control device of an oil power generation machine according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Firstly, the working principle of controlling the start and the stop of the generator set by the automatic change-over switch circuit is described with reference to the accompanying drawings, and specifically with reference to fig. 1, the diagram is a schematic diagram of controlling the generator set by the automatic change-over switch circuit provided by the embodiment of the present application.
Automatic change-over switch circuit 101 can monitor the supply voltage of commercial power, judge whether the commercial power cuts off the power supply according to the supply voltage of commercial power, when judging the commercial power outage, can be closed through control change-over switch K0, because change-over switch K0 connects generating set controller 102, therefore generating set controller 102 can judge that the commercial power outage needs to open the generating set through the state change of K0, then generating set controller 102 sends the instruction of opening to generating set 103, control generating set opens and carries out work, and then supply power for the consumer, guarantee the uninterrupted power supply of consumer.
The electric equipment may be electric equipment in various fields, for example, communication equipment, household appliances of ordinary users, or other industrial equipment. When the electric device is a communication device, it may be a base station or a server. The specific type of the electric equipment is not limited in the embodiment of the application, and all equipment needing uninterrupted power supply can use the technical scheme provided by the embodiment of the application.
However, as can be seen from fig. 1, once the automatic change-over switch circuit 101 fails, the state of K0 cannot be properly controlled, and the genset controller 102 cannot control the start-stop of the genset through the state change of K0.
Therefore, the embodiment of the application provides a unit monitoring circuit of generating set for solve the unable normal control generating set's of automatic switch circuit 101 trouble and open and stop, under the normal condition, unit monitoring circuit and automatic switch circuit independent work simultaneously, because first switch is the normally closed switch, the second switch is normally open switch, therefore acquiescence operating mode is opening and stopping by unit monitoring circuit control generating set. When the automatic change-over switch circuit breaks down, the start and stop of the generator set controlled by the generator set monitoring circuit are not influenced. And then guarantee when the commercial power outage, the generating set supplies power for consumer. In addition, when the unit monitoring circuit fails, the automatic switching circuit can automatically switch to the automatic switching circuit to control the starting and stopping of the generator unit.
Example one
In order to enable those skilled in the art to better understand the technical solutions provided by the present application, a unit monitoring circuit of a generator set provided in the embodiments of the present application is described in detail below with reference to the accompanying drawings.
Referring to fig. 2, the diagram is a schematic diagram of a unit monitoring circuit according to an embodiment of the present application.
For clarity of the operation of the unit monitoring circuit, fig. 2 includes an automatic transfer switch circuit 101, a generator set controller 102, and a generator set 103.
The unit monitoring circuit 200 of the generator set provided by the embodiment includes: a first switch K1, a second switch K2, a microprocessor 201, a first port 202 and a second port 203;
the first port 202 is connected with the automatic change-over switch circuit 101; the second port 203 is connected with the generator set controller 102;
the first switch K1 is a normally closed switch, and the second switch K2 is a normally open switch;
the unit monitoring circuit 200 is connected with the automatic transfer switch circuit 101;
the automatic changeover switch circuit 101 includes a changeover switch K0;
the first switch K and the second switch K2 are any one of the following: relay, IGBT and silicon controlled rectifier. The specific application may be selected according to the needs, and the embodiment is not particularly limited, and similarly, K0 is also applicable.
The switch K0 is connected to the first port;
two ends of the first switch K1 are respectively connected with the first port and the second port;
the second switch K2 is connected between the microprocessor 201 and the generator set controller 102;
the automatic change-over switch circuit 101 is used for controlling the change-over switch K0 to be closed when the commercial power is determined to be powered off, and otherwise controlling the switch K0 to be opened.
The automatic changeover switch circuit 101 may include: a voltage detection circuit (not shown in the figure);
the voltage detection circuit is used for detecting the power supply voltage of the commercial power, and when the power supply voltage of the commercial power is judged to be lower than the preset voltage, the commercial power is determined to be powered off, otherwise, the commercial power is determined to be normally powered on.
And the microprocessor 201 is used for controlling the first switch K1 to be switched off and the second switch K2 to be switched on when the commercial power is determined to be cut off, so that the generator set is started to generate power.
The unit monitoring circuit 200 works in an online mode as long as it is normal, and the online mode means that the microprocessor 201 controls the K1 to be always in an off state no matter whether the mains supply is powered off or not.
Since K1 is always in the off state, i.e., the automatic transfer switch circuit 101 and the generator set controller 102 are in the open state, there is no control path. Therefore, the operating state of the automatic changeover switch circuit 101 in the online mode does not affect the operating state of the generator set controller 102.
The microprocessor 201 may monitor the supply voltage of the utility power independently, or may monitor the supply voltage of the utility power indirectly through the automatic changeover switch circuit 101.
When the microprocessor 201 indirectly monitors the supply voltage of the commercial power through the automatic changeover switch circuit 101, specifically, when the automatic changeover switch circuit 101 monitors the power failure of the commercial power, the control unit K0 is closed, the control unit K0 is connected with the second port, the second port is connected with the IO port of the microprocessor 201, the microprocessor 201 detects the level state change of the IO port so as to know whether the K0 is closed, and when the K0 is closed, the microprocessor 201 knows the power failure of the commercial power.
Under normal conditions, unit monitoring circuit and automatic transfer switch circuit independent work simultaneously, because first switch is the normally closed switch, the second switch is normally open switch, therefore acquiescence operating mode is opening by the opening and stopping of unit monitoring circuit control generating set. When the automatic change-over switch circuit breaks down, the start and stop of the generator set controlled by the generator set monitoring circuit are not influenced. And then guarantee when the commercial power outage, the generating set supplies power for consumer. In addition, when the unit monitoring circuit fails, the automatic switching circuit can automatically switch to the automatic switching circuit to control the starting and stopping of the generator unit.
In addition, when the unit monitoring circuit 200 fails, since K1 is a normally closed switch and K2 is a normally open switch, K1 will return to the normally closed state, and K2 will return to the normally open state, at which time the start and stop of the generator set can be controlled by the automatic transfer switch circuit 101. Obviously, the reliability of the control of the generator set is improved by using the unit monitoring circuit 200, and when one of the units fails, the other unit can be automatically switched to control the other unit.
Example two
In fig. 2, each switch is connected to the first port and the second port by one wire, and since the switches are classified into active switches and passive switches, and the switches manufactured by different manufacturers are different, the positive and negative of the two ends of the switch are not clear, and therefore, for convenience in installation and use and safety in operation, the embodiment of the present application performs a two-wire connection for each switch, which is described in detail below with reference to fig. 3.
Referring to fig. 3, a schematic diagram of another unit monitoring circuit provided in the embodiment of the present application is shown.
In this embodiment, the first port of the unit monitoring circuit 200 includes the following two ports: a first interface A and a second interface B;
a first end of the first switch K1 is connected with the first interface A, and a second end of the first switch K1 is connected with the second interface B;
a first end of the switch K0 is connected to the first interface A, and a second end of the switch K0 is connected to the second interface B;
a first IO port 1 of the microprocessor 201 is connected to the first interface a, and a second IO port 2 of the microprocessor 201 is connected to the second interface B;
the microprocessor 201 is configured to detect a state change of the first IO port 1 and the second IO port 2 to determine whether the commercial power is powered off.
For example, when K0 is open, the signals detected by the first IO port 1 and the second IO port 2 are different, and when K0 is closed, the signals detected by the first IO port 1 and the second IO port 2 are the same, so that the microprocessor 201 can determine whether the mains power is off according to the state change of the first IO port 1 and the second IO port 2.
Similarly, the second port of the unit monitoring circuit 200 includes the following two interfaces: a third interface C and a fourth interface D;
a first end of the second switch K2 is connected to the third interface C, and a second end of the second switch K2 is connected to the fourth interface D;
a first IO port of the generator set controller is connected with the third interface C, and a second IO port of the generator set controller is connected with the fourth interface D;
a third IO port of the microprocessor 201 is connected to a control terminal of the second switch K2;
the first switch K1 includes four terminals: a first end, a second end, a third end and a fourth end;
the first end of the first switch K1 is connected to the first interface a, the second end of the first switch is connected to the second interface B, the third end of the first switch is connected to the third interface C, and the fourth end of the first switch is connected to the fourth interface D.
The switch states of K1 and K2 are controlled by microprocessor 201.
When the microprocessor 201 monitors the signals of the first IO port 1 and the second IO port 2 to judge the power failure of the mains supply, the control K1 is switched off, the control K2 is closed, the third port C and the fourth port D are respectively connected to the two ends of the control K2, and the first IO port and the second IO port of the generator set controller 102 are respectively connected to the control C and the control D, therefore, when the generator set controller 102 detects that the signals of the first IO port and the second IO port are the same, the power failure of the mains supply is known, the generator set needs to be started, and then a start instruction is sent to the generator set 103 to control the start of the generator set 103.
The microprocessor 201 is further configured to control the first switch K1 and the second switch K2 to be both turned off when it is determined that the utility power is supplied normally, so as to stop the generator set. Wherein, the microprocessor 201 can determine whether the commercial power is restored by detecting the state change of the first IO port 1 and the second IO port 2.
Every switch corresponds two wires in the unit monitoring circuit that this embodiment provided, can guarantee the degree of accuracy that signal detected like this, is applicable to the switch of each producer's production moreover, and this scheme has the commonality, implements the convenience.
The unit monitoring circuit provided by the embodiment can not remotely control the start and stop of the generator set and can not remotely monitor the state of the generator set, the problem can be found only when the power supply is abnormal, the problem is not conveniently positioned and analyzed and processed in time, the abnormal problem processing period is long, and the cost is high; the unit monitoring circuit provided by the following embodiment can remotely control the start and stop of the generator set and can remotely monitor the state of the generator set. Therefore, whether problems occur or not can be remotely monitored in real time and timely treatment can be carried out when the problems occur. The drawings are described in detail below.
EXAMPLE III
Referring to fig. 4, the diagram is a schematic diagram of another unit monitoring circuit provided in the embodiment of the present application.
The unit monitoring circuit in the unit monitoring circuit provided by this embodiment further includes: an antenna ANT;
the microprocessor 201 is further configured to receive a generator set shutdown instruction sent by the remote controller 300 through the antenna ANT, control the first switch K1 to be turned off according to the generator set shutdown instruction, and control the second switch K2 to be turned off.
The remote controller 300 may be a server, or a computer of a control center.
When the above situation is for troubleshooting, the remote controller 300 may remotely send a generator set shutdown instruction to the microprocessor 201, and then perform troubleshooting.
The microprocessor 201 can notify the remote controller 300 of the power supply condition of the utility power through the antenna ANT, that is, both the normal power supply and the power failure of the utility power can be notified to the remote controller 300.
The microprocessor 201 is configured to control the first switch K1 to be turned off and the second switch K2 to be turned on when determining that the utility power is off, and specifically includes:
the microprocessor 201 sends the commercial power outage information to the remote controller 300 through the antenna ANT; the antenna ANT is further used for receiving a generator set starting instruction fed back by the remote controller 300 and controlling the generator set 103 to be started according to the generator set starting instruction.
The microprocessor 201 is further configured to send a commercial power restoration information to the remote controller 300 through the antenna ANT when it is determined that the commercial power supply is normal; and is further configured to control the generator set 103 to stop working when receiving a generator set stop instruction fed back by the remote controller 300 through the antenna ANT.
The antenna ANT and the remote controller 300 communicate with each other in one of the following ways:
zigbee, Sub-1G, WIFI, and bluetooth.
Specific communication modes are not specifically limited in the embodiments of the present application.
The unit monitoring circuit provided by this embodiment can communicate with the remote controller 300 to notify the power supply condition of the utility power, and can receive various commands sent by the remote controller 300 and execute actions corresponding to the commands. The unit monitoring circuit provided by the embodiment can be combined with the automatic change-over switch circuit to control the generator set, and can also interact with a remote controller, and when the unit monitoring circuit fails, the automatic change-over switch circuit controls the working state of the generator set; and when the unit monitoring circuit is normal, the working state of the generator set is controlled by the unit monitoring circuit.
Example four
The generator set is any one of the following: the system comprises an oil engine generator set, a wind power generator set and a photovoltaic generator set. The embodiments of the present application are not particularly limited. For example, when the generator set is an oil engine generator set, it may be a diesel engine generator set.
The cost that general generating set electricity generation supplied power to consumer is higher, therefore, generating set local still is furnished with the battery, and when generating set supplied power for consumer, still charges for the battery. Therefore, when the mains supply is powered off, if the electric quantity of the storage battery is enough to maintain the operation of the electric equipment, the storage battery can be preferentially used for supplying power to the electric equipment. The following detailed description is made with reference to the accompanying drawings.
Referring to fig. 5, a schematic diagram of another unit monitoring circuit provided in the embodiment of the present application is shown.
Wherein, the general generator set 103 comprises a storage battery 103 a;
the microcontroller 102 is further configured to obtain an electric quantity of the storage battery 103 a; when the mains supply is powered off and the electric quantity of the storage battery 103a is larger than the preset electric quantity, controlling the storage battery 103a to supply power to the electric equipment; when the mains supply is powered off and the electric quantity of the storage battery 103a is smaller than or equal to the preset electric quantity, the first switch K1 is controlled to be switched off, and the second switch K2 is switched on to control the generator set 103 to be switched on.
Because the generating cost of the generator set 103 is high, when the commercial power is cut off, as long as the electric quantity of the storage battery 103a is enough to provide electric energy for the electric equipment, that is, the electric equipment can normally work by using the electric energy provided by the storage battery 103a, the storage battery 103a is preferentially used to supply power for the electric equipment; as long as the working time of the generator set can be reduced, and the power generation cost is further reduced. The power supply unit 103 supplies power to the electric equipment only when the battery 103a is not charged enough to maintain the normal operation of the electric equipment.
The unit monitoring circuit that this embodiment provided can be when the commercial power outage, and the power generation cost of generating set can be saved to the power consumption equipment power supply of preferred use battery.
The unit monitoring circuit provided by the above embodiment may be installed on one side of the automatic transfer switch circuit, and may also be installed on one side of the generator set, which is not limited in the embodiment of the present application.
The unit monitoring circuit provided by the above embodiment preferentially uses the unit monitoring circuit to control the start and stop of the generator set, and the unit monitoring circuit can interact with the remote controller to receive the command of the remote controller. In addition, when the unit monitoring circuit breaks down, the control loop of the generator set can be automatically switched to the automatic change-over switch circuit, and the automatic change-over switch circuit controls the start and stop of the generator set.
EXAMPLE five
Based on the above unit monitoring circuit of the generator set provided by the embodiment, the embodiment of the application further provides a control method of the generator set, which is described in detail below.
The control method for the generator set provided by this embodiment is applied to the generator set monitoring circuit for the generator set described in the above embodiment, and includes:
and when the mains supply is determined to be powered off, the change-over switch is controlled to be closed, the first switch is controlled to be disconnected, and the second switch is controlled to be closed, so that the generator set is started to generate power.
Because the unit monitoring circuit is connected with the automatic change-over switch circuit, when the automatic change-over switch circuit breaks down, the start and stop of the generator set controlled by the unit monitoring circuit are not influenced. Because the first switch is a normally closed switch and the second switch is a normally open switch, the default working mode is that the generator set monitoring circuit controls the starting and stopping of the generator set, and when the generator set monitoring circuit fails, the automatic switching circuit automatically switches to the automatic switching circuit to control the starting and stopping of the generator set. Therefore, the control method can ensure that the start-stop control of the generator set is not influenced when the automatic change-over switch circuit fails, and further ensure that the generator set supplies power to the electric equipment when the commercial power is cut off.
In addition, the method further comprises the following steps:
and when the mains supply is determined to be normal, controlling the first switch and the second switch to be disconnected so as to stop the generator set.
Before controlling the first switch to be opened and the second switch to be closed, so that the generator set is started to generate power, the method may further include:
obtaining the electric quantity of the storage battery; when the mains supply is determined to be powered off and the electric quantity of the storage battery is larger than the preset electric quantity, controlling the storage battery to supply power to the load;
when the commercial power is determined to be powered off and the electric quantity of the storage battery is smaller than or equal to the preset electric quantity, the first switch is controlled to be switched off, and the second switch is controlled to be switched on so as to control the generator set to be switched on.
The cost that general generating set electricity generation supplied power to consumer is higher, therefore, generating set local still is furnished with the battery, and when generating set supplied power for consumer, still charges for the battery. Therefore, when the mains supply is powered off, if the electric quantity of the storage battery is enough to maintain the operation of the electric equipment, the storage battery can be preferentially used for supplying power to the electric equipment.
EXAMPLE six
Based on the above unit monitoring circuit and control method of the generator set provided by the embodiments, the embodiments of the present application further provide a control device of the generator set, which is described in detail below.
Referring to fig. 6, the figure is a schematic diagram of a control device of an oil power generation machine according to an embodiment of the present application.
The control device of the oil generator provided in this embodiment includes the unit monitoring circuit 200 of the generator set described in the above embodiments, and further includes: an automatic changeover switch circuit 101;
the generator set is any one of the following: the system comprises an oil engine generator set, a wind power generator set and a photovoltaic generator set.
The control equipment comprises an automatic change-over switch circuit 101 and a unit monitoring circuit 200, wherein the automatic change-over switch circuit and the unit monitoring circuit can work independently and simultaneously without mutual influence, and when one of the automatic change-over switch circuit and the unit monitoring circuit fails, the automatic change-over switch circuit can be automatically switched to work for the other automatic change-over switch circuit. When both are normal, the generator set monitoring circuit can preferentially control the start and stop of the generator set. Because the unit monitoring circuit is connected with the automatic change-over switch circuit, when the automatic change-over switch circuit breaks down, the start and stop of the generator set controlled by the unit monitoring circuit are not influenced. Because the first switch is the normally closed switch, the second switch is normally open switch, therefore acquiescence operating mode is by the opening and shutting of unit monitoring circuit control generating set. When the automatic change-over switch circuit breaks down, the start and stop of the generator set controlled by the generator set monitoring circuit are not influenced. And then guarantee when the commercial power outage, the generating set supplies power for consumer. In addition, when the unit monitoring circuit fails, the automatic switching circuit can automatically switch to the automatic switching circuit to control the starting and stopping of the generator unit.
In addition, the automatic change-over switch circuit is also used for controlling the change-over switch to be switched off when the mains supply is determined to be normal.
In addition, the control system may further include: a remote controller;
the unit monitoring circuit 200 receives a generator set stop instruction sent by a remote controller through the antenna, and controls the first switch to be switched off and the second switch to be switched off according to the generator set stop instruction.
The control device provided by this embodiment can realize the combination of local control and remote control, and the microprocessor can communicate with the remote controller to notify the power supply condition of the utility power, and can receive various instructions sent by the remote controller and execute actions corresponding to the instructions. The control device provided by the embodiment can be combined with the automatic change-over switch circuit to control the generator set, and can also interact with the remote controller, and when the generator set monitoring circuit is in fault, the automatic change-over switch circuit controls the working state of the generator set; and when the unit monitoring circuit is normal, the working state of the generator set is controlled by the unit monitoring circuit.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (18)
1. A unit monitoring circuit for a generator set, the unit monitoring circuit comprising: the device comprises a first switch, a second switch, a microprocessor, a first port and a second port;
the first port is connected with an automatic change-over switch circuit of the generator set; the second port is connected with the generator set controller;
the automatic change-over switch circuit comprises a change-over switch;
the first switch is a normally closed switch, and the second switch is a normally open switch;
the switch is connected with the first port;
two ends of the first switch are respectively connected with the first port and the second port;
the second switch is connected between the first IO port and the second IO port of the generator set controller;
the automatic change-over switch circuit is used for controlling the change-over switch to be closed when the commercial power is determined to be cut off;
and the microprocessor is used for controlling the first switch to be switched off and the second switch to be switched on when the commercial power is determined to be cut off, so that the generator set is started to generate power.
2. The unit monitoring circuit of a generator set of claim 1, wherein when the unit monitoring circuit fails, the first switch is normally closed and the second switch is normally open;
and when the unit monitoring circuit is normal, the first switch is controlled to be switched off.
3. The unit monitoring circuit of a generator set of claim 1, wherein the automatic transfer switch circuit further comprises: a voltage detection circuit;
the voltage detection circuit is used for detecting the power supply voltage of the commercial power, and when the power supply voltage of the commercial power is judged to be lower than the preset voltage, the commercial power is determined to be powered off, otherwise, the commercial power is determined to be normally powered on.
4. The unit monitoring circuit of a generator set of claim 1, wherein the first port comprises two of: a first interface and a second interface;
the first end of the first switch is connected with the first interface, and the second end of the first switch is connected with the second interface;
a first IO port of the microprocessor is connected with the first interface, and a second IO port of the microprocessor is connected with the second interface;
the microprocessor is used for detecting the state change of the first IO port and the second IO port to determine whether the mains supply is powered off;
the first end of the change-over switch is connected with the first interface, and the second end of the change-over switch is connected with the second interface.
5. The unit monitoring circuit of a generator set of claim 4, wherein the second port comprises two of: a third interface and a fourth interface;
a first end of the second switch is connected with the third interface, and a second end of the second switch is connected with the fourth interface;
a first IO port of the generator set controller is connected with the third interface, and a second IO port of the generator set controller is connected with the fourth interface;
a third IO port of the microprocessor is connected with the control end of the second switch;
the first switch comprises the following four terminals: a first end, a second end, a third end and a fourth end;
the first end of the first switch is connected with the first interface, the second end of the first switch is connected with the second interface, the third end of the first switch is connected with the third interface, and the fourth end of the first switch is connected with the fourth interface.
6. The monitoring circuit of generator set of claim 4, wherein the microprocessor is further configured to control both the first switch and the second switch to be turned off when it is determined that the utility power is supplied normally, so as to stop the operation of the generator set.
7. The unit monitoring circuit of a generator set of claim 1, further comprising: an antenna;
the microprocessor is also used for receiving a generator set stop instruction sent by a remote controller through the antenna, controlling the first switch to be switched off according to the generator set stop instruction and controlling the second switch to be switched off.
8. The unit monitoring circuit of a generator set according to claim 7, wherein the microprocessor is configured to control the first switch to be turned off and the second switch to be turned on when determining that the utility power is cut off, and specifically includes:
the microprocessor sends commercial power outage information to the remote controller through the antenna; the antenna is used for receiving a generator set starting instruction fed back by the remote controller, and the generator set is controlled to be started according to the generator set starting instruction.
9. The unit monitoring circuit of the generator set according to claim 8, wherein the microprocessor is further configured to send a commercial power restoration information to the remote controller through the antenna when it is determined that the commercial power is normally supplied; and the antenna is also used for controlling the generator set to stop working when receiving a generator set stop instruction fed back by the remote controller.
10. The unit monitoring circuit of a generator set according to any one of claims 7-9, wherein the antenna communicates with the remote controller by one of:
zigbee, Sub-1G, WIFI, and bluetooth.
11. The unit monitoring circuit of a generator set according to any one of claims 1-6, wherein the generator set includes a battery;
the microprocessor is also used for obtaining the electric quantity of the storage battery; when the mains supply is determined to be powered off and the electric quantity of the storage battery is larger than the preset electric quantity, controlling the storage battery to supply power to the electric equipment; when the commercial power is determined to be powered off and the electric quantity of the storage battery is smaller than or equal to the preset electric quantity, the first switch is controlled to be switched off, and the second switch is controlled to be switched on so as to control the generator set to be switched on.
12. The unit monitoring circuit of a generator set of claim 1, wherein the first switch and the second switch are any one of: relay, IGBT and silicon controlled rectifier.
13. A control method for a generator set, applied to a generator set monitoring circuit of a generator set according to any one of claims 1 to 12, comprising:
and when the mains supply is determined to be powered off, the change-over switch is controlled to be closed, the first switch is controlled to be disconnected, and the second switch is controlled to be closed, so that the generator set is started to generate power.
14. The method of controlling a generator set of claim 13, further comprising:
and when the mains supply is determined to be normal, controlling the first switch and the second switch to be disconnected so as to stop the generator set.
15. The method for controlling a generator set according to claim 13, wherein before controlling the first switch to be open and the second switch to be closed to enable the generator set to be turned on for generating power, the method further comprises:
acquiring the electric quantity of the storage battery; when the mains supply is determined to be powered off and the electric quantity of the storage battery is larger than the preset electric quantity, controlling the storage battery to supply power to the load;
when the commercial power is determined to be powered off and the electric quantity of the storage battery is smaller than or equal to the preset electric quantity, the first switch is controlled to be switched off, and the second switch is controlled to be switched on so as to control the generator set to be switched on.
16. A control apparatus of a generator set, comprising the unit monitoring circuit of the generator set according to any one of claims 1 to 12, characterized by further comprising: an automatic transfer switch circuit;
the generator set is any one of the following: the system comprises an oil engine generator set, a wind power generator set and a photovoltaic generator set.
17. The control device of a generator set according to claim 16, wherein the automatic transfer switch circuit is further configured to control the transfer switch to be turned off when it is determined that the utility power is supplied normally.
18. The control apparatus of a generator set according to claim 16 or 17, characterized by further comprising: a remote controller;
the control equipment receives a generator set stop instruction sent by the remote controller through an antenna, and controls the first switch to be switched off and the second switch to be switched off according to the generator set stop instruction.
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