CN103311959B - Monitoring device and method thereof - Google Patents

Abstract

The invention provides a monitoring device and a method thereof. The monitoring method establishes a bypass path (bypass) for each corresponding element or load by directly conducting voltage or current to monitor the working state. Therefore, the monitoring method can directly turn on the device to be monitored to ascertain or manage the actual operating states of the device and the load.

Description

Monitoring device and method thereof

technical field

The invention relates to a monitoring and detection technology, and in particular provides a monitoring device and method applied to AC and DC circuits.

Background technique

Corresponding to the characteristics of different electronic components, AC and DC interoperable conversion applications are very common applications in current electronic products. For example, Light Emitting Diode (LED) desk lamps obtain the mains voltage (AC voltage) from the socket. After an AC-DC converter, the input AC voltage is converted into a DC voltage for driving LEDs. However, if this application is extended to hundreds of LED street lights in a township, when troubleshooting or maintenance, Relevant maintenance manufacturers not only need to know in advance what the damaged LED street lamp is, but also have to disassemble the internal circuit of the street lamp to know whether the damaged LED street lamp has a problem with the DC circuit, the AC circuit or the AC-DC converter is damaged. Therefore, for each troubleshooting or maintenance task, the relevant maintenance manufacturer needs to carry all the equipment and parts, which consumes a considerable amount of manpower and cost for detection and monitoring.

In addition, with the advancement and popularization of solar technology, the efficiency of photoelectric conversion is getting higher and higher, and the cost of installing solar photoelectric conversion systems is getting lower and lower. More and more governments are actively developing solar photoelectric conversion systems and encouraging private installations. In order to reduce energy shortage and solve the problem of petrochemical pollution.

However, solar photoelectric conversion systems pay great attention to the area that can receive sunlight, so many solar photoelectric conversion systems are mostly installed on the roof of buildings, or areas with vast hinterlands, and because of this, the construction of solar photoelectric conversion systems is very scattered , and most of them are installed in remote and open areas, especially a large-scale solar photoelectric conversion system. When a fault occurs, the current detection and monitoring technology cannot directly determine the damaged part, and the maintenance team must go to the site for maintenance. And all repair materials must be carried throughout the journey, so repair and maintenance tasks have been a time-consuming and cost-intensive task in the long run.

For example, please refer to FIG. 1 , a general solar photoelectric conversion system includes a photovoltaic array 100 , a DC working module 102 , a DC to AC converter 104 , an AC working module 106 and an AC output switch 108 . The photovoltaic array 100 is generally called a solar panel. When sunlight shines on the photovoltaic array 100, the photovoltaic array 100 will perform photoelectric conversion, converting the sunlight into a direct current, which is input to the direct current converter 104 through the direct current working module 102, and then The DC-to-AC converter 104 converts an AC power to the AC working module 106, and finally sends (or sells) the AC power to an external mains system (not shown in the figure) through the AC output switch 108 (for example: the power company's power supply system).

In terms of current monitoring technology, most of them are connected to the DC-AC converter 104 through a monitor 110 (for example: a computer). When a link in the photoelectric conversion system fails, the monitor 110 will receive a fault notification. And notify the maintenance team for inspection. The maintenance team cannot know from the failure notification whether the DC-AC converter 104 itself fails or other parts (for example: the DC working module 102 ) fail, so they have to carry all the spare materials required for maintenance to the site.

In addition, in the application of general solar photoelectric conversion systems, the power supply (transmitted from the power plant of the power company) and the sale of electricity are often independent. When general commercial users apply for power supply with the power company, they need to apply to the power company in advance for the amount of electricity consumption (that is, the capacity of the power contract). When the power consumption of the commercial user exceeds the applied power contract capacity, the power company will Give a punitive liquidated damages, the liquidated damages are much greater than the amount obtained from selling electricity. To put it simply, if the commercial user sets up a 10-kilowatt-hour (KWh) solar photoelectric conversion system, and also signs a 30-kilowatt-hour electricity contract capacity with the power company; When electricity is consumed, the power company will fine the commercial user. At the same time, the photoelectric conversion system still sells 10 kWh of electricity to the power company. The current amount of electricity sales rewarded by the government cannot make up for the penalty for breach of contract.

Therefore, manufacturers related to solar photoelectric conversion systems need to develop a set of devices or mechanisms that can monitor in real time and detect the corresponding faulty components inside the photoelectric conversion system, as a basis for the maintenance team to dispatch repairs and prepare materials, or actively and effectively manage Power generation applications of photoelectric conversion systems.

Contents of the invention

In view of the above-mentioned deficiency and the motivation of the invention, the inventors have thought hard and finally developed the present invention.

One aspect of the present invention is to provide a monitoring device for power system management application, which establishes a bypass path for each corresponding device in a power system by adding a switch to drive the corresponding device.

According to a device embodiment provided by the present invention, the monitoring device of the present invention includes a controller, the controller includes at least one switch, one end of the switch is connected to a load, and the other end of the switch is connected to supply the load with power. A power supply, wherein the controller turns on or off the switch according to an operation instruction, so as to turn on or turn off the load correspondingly.

Another scope of the present invention is to provide a monitoring device applied to a photoelectric conversion system, which establishes a bypass path for each corresponding component in a photoelectric conversion system by adding a switch to monitor the working status of a photoelectric conversion system .

According to a device embodiment provided by the present invention, the monitoring device of the present invention is applied to a photoelectric conversion system, and the monitoring device includes a controller, which is connected to a commercial power system and includes at least one first AC bypass switch With at least one second AC bypass switch, a first end of the first AC bypass switch is connected to an output end of the DC converter of the photoelectric conversion system, and a second end of the first AC bypass switch Then a load is connected, a first end of the second AC bypass switch is connected to the first end of the first AC bypass switch, a second end of the second AC bypass switch is connected to an AC of the photoelectric conversion system output switch.

Wherein, the controller detects the utility power system, and sends a control signal according to a contract capacity rule to turn on or turn off the first and second AC bypass switches.

According to another device embodiment provided by the present invention, the monitoring device of the present invention is applied to a photoelectric conversion system, which has a photovoltaic array, a DC working module, a DC converter, an AC working module and a For an AC output switch, the monitoring device includes a controller, and the controller includes at least one AC bypass switch and at least one DC bypass switch. The AC bypass switch is connected to one end of the DC converter and the AC working module. The DC bypass switch is connected to the photovoltaic array and the other end of the DC-to-AC converter. The controller is connected to the DC-AC converter to obtain the operating information of the DC-AC converter, and sends a corresponding control signal according to the operating information to turn on or off the AC bypass switch or the DC bypass switch. Another scope of the present invention is to provide a monitoring method applied to a photoelectric conversion system, which detects the working state of a photoelectric conversion system by directly conducting voltage or current.

According to a method embodiment provided by the present invention, the monitoring method of the present invention is applied to a photoelectric conversion system, the photoelectric conversion system has a photovoltaic array, a DC working module, a DC converter, an AC working module and a AC output switch, the steps of the monitoring method include obtaining a first operating information from the DC-AC converter, and when the first operating information is offline, turning on the DC-AC converter, the photovoltaic array and the AC output After switching on and off, a second operation information is obtained from the DC-AC converter, and when both the first operating information and the second operating information are offline, it is determined that the DC-AC converter is faulty.

To sum up, with the monitoring method and device of the present invention, a bypass path can be established to directly connect the components to be tested to detect the real working status of the components or actually drive and manage the components.

Description of drawings

FIG. 1 is a schematic diagram of a conventional photoelectric conversion system architecture.

FIG. 2A is a schematic diagram of an embodiment of a 7-series and 3-parallel parallel photoelectric conversion system of the present invention.

FIG. 2B is a schematic diagram of another embodiment of a 7-series and 3-parallel parallel photoelectric conversion system of the present invention.

Fig. 3A is a flowchart of an embodiment of the monitoring method of the present invention.

FIG. 3B is a schematic diagram of sub-steps of step S302 in FIG. 3A .

Fig. 4A is a flowchart of an embodiment of the monitoring method of the present invention.

Fig. 4B is a flowchart of an embodiment of the monitoring method of the present invention.

Fig. 5A is a schematic diagram of an embodiment of the monitoring device of the present invention.

Fig. 5B is a schematic diagram of an embodiment of the monitoring device of the present invention.

Fig. 6 is a schematic diagram of another embodiment of the monitoring device of the present invention.

[Description of main component symbols]

100 photovoltaic array

102 DC working module

104 DC to AC Converter

106 Communication Work Module

108 AC output switch

110 Monitor

20 photovoltaic arrays

22 DC working modules

220 DC shunt

222 fuse

224 circuit breaker

24 dc to ac converter

26 AC work modules

28 AC output switch

30 load

32 ammeter

50 controllers

502 AC bypass switch

502A first AC bypass switch

502B second AC bypass switch

504 DC bypass switch

506 switch

52 AC detection module

522 AC voltage detection port

524 AC current detection port

54 DC detection module

56 network modules

542 DC voltage detection port

544 DC current detection port

60 load

62 power supply

detailed description

The following examples provide the monitoring method and device of the present invention applied to a photoelectric conversion system.

Please refer to FIG. 2A . FIG. 2A is a 7-series and 3-parallel parallel photoelectric conversion system. In this embodiment, the parallel photoelectric conversion system is a known solar photovoltaic power generation system, which includes three sets of parallel photovoltaic arrays 20, a DC working module 22, a DC working module 24, an AC working module 26 and a AC output switch 28. To facilitate the description of this case, Figure 2 omits some components (for example: the surge receiver in the DC working module 22, or the mechanical watt-hour meter in the AC working module 26), and only shows the block diagram, but it is known that the technology of this case People in the field can still understand the content of the present invention and implement it according to the content provided in this case and this drawing.

In addition, it is worth noting that the 7-series and 3-parallel parallel photoelectric conversion system described in this embodiment can also be expanded to any number of strings and the number of photovoltaic arrays 20 in parallel, or multiple parallel photoelectric conversion systems The conversion systems are combined to form a photoelectric conversion system with greater output. Therefore, the embodiment of the 7-series and 3-parallel photoelectric conversion system is only for teaching purposes and is not intended to limit the present invention.

As shown in FIG. 2A , the DC working module 22 includes three DC shunts 220 , and one end of each DC shunt 220 is connected to the corresponding photovoltaic array 20 through a fuse 222 . The other end of each DC shunt 220 is connected to the DC converter 24 through a circuit breaker 224 . The AC working module 26 is connected between the DC-AC converter 24 and the AC output switch 28, and the AC output switch 28 is connected to a mains power system (for example: the power system of the power company) to send (or sell) generated electricity.

Please refer to Fig. 2B, the monitoring device of the present invention is applied to the above-mentioned photoelectric conversion system. According to one embodiment, a monitoring device includes a controller 50, and the controller 50 is connected to a commercial power system through an ammeter 32 (in the figure not shown) and includes at least a first AC bypass switch 502A and a second AC bypass switch 502B, a first end of the first AC bypass switch 502A is connected to the AC working module 26 and the AC output switch 28 A second terminal of the first AC bypass switch 502A is connected to a load 30, a first terminal of the second AC bypass switch 502B is connected to the ammeter 32, and a second terminal of the second AC bypass switch 502B The terminal is connected to the AC output switch 28.

The controller 50 detects a power supply (unit: kilowatt-hour) of the utility power system (for example, through the ammeter 32 ), and sends a control signal according to a contract capacity rule. The controller 50 can communicate with the The first and second AC bypass switches 502A, 502B are connected, and wireless transmission or other wired transmission means can also be used to turn on or off the first and second AC bypass switches 502A, 502B.

When the power supply is higher than the contract capacity rule, the controller 50 sends a control signal. The controller 50 can be connected to the first and second AC bypass switches 502A and 502B through but not limited to RS485 to conduct the first AC bypass switch 502A, and at the same time turn off the second AC bypass switch 502B, so that the power supply power is reduced, and the photovoltaic array 20 assists in supplying power to the load.

Similarly, when the power supply recovers to be lower than the contract capacity rule, the controller 50 sends another control signal. The controller 50 can connect the second AC bypass switch 502B, the first AC bypass switch 502B, and the first AC bypass switch through but not limited to RS485. The connection through the switch 502A can also be wireless transmission or other wired transmission means, the second AC bypass switch 502B is turned on, and the first AC bypass switch 502A is turned off at the same time, so that the photovoltaic array 20 returns to the state of selling electricity.

It is worth noting that the above-mentioned embodiment only illustrates the switching of a single level. If the photoelectric conversion system is a large-scale system in which multiple photovoltaic arrays 20 are connected in parallel, the monitoring device of the present invention can respond by expanding the number of AC bypass switches 502. Architecture for switching and managing distribution power.

Please refer to FIGS. 2A and 3A, the monitoring method of the present invention is applied to the above-mentioned photoelectric conversion system. The monitoring method includes steps: S300 obtains a first operation information from the DC-AC converter 24, wherein the first operation The information includes an offline state, an error state, and a normal state; S302, when the first operation information is in the offline state, simultaneously turn on the DC-AC converter 24 and the photovoltaic array 20 and the DC-AC converter 24 and the AC output switch 28; S304 obtains a second operation information from the direct current converter 24, wherein the second operation information includes an offline state, an error state and a normal state; and S306 when the first operation information and the second When the two operating information are both offline, it is determined that the DC-AC converter 24 is faulty.

Please refer to FIG. 3B . According to one embodiment, since the power generation of the photoelectric conversion system needs sunlight, when the operation information of the DC-AC converter 24 is offline, there is another possibility because of the relationship at night, so step S302 is another The method includes the following sub-steps: S3020 judging the current time range of the photoelectric conversion system; S3022, when the time range is a daytime, simultaneously turning on the DC-AC converter 24, the photovoltaic array 20 and the DC-AC converter 24 and the AC output switch 28; otherwise, S3024 ignores the offline state of the operation information when the time range is an evening time.

Specifically, when the first operation information is received as being in an offline state, in order to clarify whether the DC-AC converter 24 itself fails, or other components in the photoelectric conversion system fail or cause an open circuit, the DC-AC converter 24 is offline; step S302 is to directly connect the photovoltaic array 20, the AC output switch 28 and the DC-to-AC converter 24 by establishing a bypass path (bypass), and disconnect the DC working module 22 and the AC working module. The connection relationship between 26 and the DC-AC converter 24 will input the direct current generated by photoelectric conversion in the photovoltaic array 20 to the DC-AC converter 24 . If the DC-AC converter 24 is really faulty, the operation information obtained in step S304 will still be offline.

Conversely, if the DC-AC converter 24 is not faulty, the input DC power will cause the DC-AC converter 24 to operate, so that the operation information obtained in step S304 is in a normal state, that is to say, when the first operation information and the second If the operation information is inconsistent, it means that the DC-AC converter 24 is not faulty. At this time, it is necessary to further detect which link or component is faulty, causing the circuit of the photoelectric conversion system to be disconnected (open circuit), so that the originally received first operation information appears as an offline state.

Please refer to FIG. 4A, the monitoring method further includes steps: S306, when the second operation information is normal, disconnect the DC-AC converter 24, the photovoltaic array 20 and the AC output switch 28; S308 sense the AC Whether there is an AC voltage from the working module 26 to the AC output switch 28; S310, when the AC voltage does not exist, it is determined that a commercial power system (not shown) connected to the AC output switch 28 from the outside has tripped; S312, when the AC voltage exists, detect whether there is an AC current between the AC working module 26 and the DC/AC converter 24; S314, when the AC current does not exist, determine that the AC working module 26 is faulty.

Please refer to FIG. 4B , the monitoring method further includes steps: S316 judges whether the two ends of the photovoltaic array 20 and the fuse 222 connected in series have a DC voltage; S318, when the DC voltage does not exist, determine whether the photovoltaic array 20 or The fuse 222 breaks down; S320, when the DC voltage exists, turn on the DC-AC converter 24 and the AC output switch 28; S322 sense the DC current of one of the DC shunts 220; S324, when the DC current does not exist, determine the open circuit 224 failure; and S326 When the DC current exists, disconnect the DC-AC converter 24 and the conduction of the AC output switch 28. That is, when the DC current exists, it means that the DC working module 22 is not faulty, and the step S320 is released during the detection process, and the DC-to-AC converter 24 and the AC output switch 28 are turned on through a shunt path.

It is worth noting that the reason why it is necessary (step S320) to turn on the DC-to-AC converter 24 and the AC output switch 28 before performing step S322 is mainly to ensure that the detection process will not be interfered by the AC working module 26, so as to establish a safe The current loop (as if the load is connected to the rear end of the DC-AC converter 24). However, ignoring step S320 will not affect the detection result of step S322 in most cases.

In addition, when the operation information of the DC-AC converter 24 is an error state or a normal state, it means that the DC-AC converter 24 has not actually failed, and the description of subsequent processing when receiving the operation information of an error state or a normal state is omitted here. Those who know the technical field of this case must still understand that even if the received operation information is in an error state, the detection of steps S306 to S326 can still be compulsorily performed to further confirm whether the circuits of the AC working module 26 and the DC working module 22 are normal.

To sum up, when it is confirmed that there is no fault in the DC-AC converter 24, through the above steps S306 to S314, it can be further confirmed whether the circuit of the AC working module 26 in the photoelectric conversion system is faulty, and the steps S316 to S326 are used to Detect whether the circuit of the DC working module 22 fails. That is to say, the monitoring method of the present invention detects each component in the overall photoelectric conversion system in a partitioned and segmented manner. As long as the real problem of the fault is found, the maintenance team can prepare the corresponding required components for the problem of the fault. Prepare materials to the site for replacement or disassembly.

Please refer to FIG. 5A , which is a schematic diagram of an embodiment of the monitoring device of the present invention. In this embodiment, the monitoring device is applied to a photoelectric conversion system, and the monitoring method of the above-mentioned steps S300 to S326 is embodied with hardware equipment. Therefore, the following description of the monitoring device will focus on the definition and description of the components, and the detailed operation steps will not be repeated. In addition, in order to simplify the cumbersome repetitive description, the photoelectric conversion system in this embodiment and the drawings is only described as a parallel photoelectric conversion system, and the same components use the same symbols; when the monitoring device of the present invention is actually applied, the There is no substantial difference between the 7-series and 3-parallel photoelectric conversion system of 2A and the parallel photoelectric conversion system of FIG. 5A .

It is worth noting that those with ordinary skill in the technical field of this case know that the monitoring device and method of the present invention can be applied to parallel, independent or hybrid (parallel/independent) photoelectric conversion systems. A parallel photoelectric conversion system will be described.

The monitoring device includes a controller 50 , and the controller 50 includes at least one AC bypass switch 502 and at least one DC bypass switch 504 . The AC bypass switch 502 is connected to one end of the DC-to-AC converter 24 and the AC working module 26 . The DC bypass switch 504 is connected to the other end of the photovoltaic array 20 and the DC-to-AC converter 24 , that is, respectively connected to opposite ends of the fuse 222 and the circuit breaker 224 . In this embodiment, the AC bypass switch 502 and the DC bypass switch 504 can be electromagnetic switches.

The controller 50 is connected to the DC-AC converter 24 for obtaining operation information of the DC-AC converter 24 and sending a corresponding control signal according to the operating information. According to an embodiment, the controller 50 can be connected to the DC-to-AC converter 24 through but not limited to RS485, and can also be wireless transmission or other wired transmission means. The operation information includes an offline state, a normal state and an error state.

Wherein, the control signal of the controller 50 is based on the actual detection requirement, which includes an AC bypass switch open signal, an AC bypass switch close signal, a DC bypass switch open signal, a DC bypass switch close signal, a An AC voltage detection signal, an AC current detection signal, a DC voltage detection signal and a DC current detection signal.

As in the monitoring method described in steps S300 to S306, when the operation information is an offline state, the controller 50 sends a control signal according to the offline state of the operation information. The controller 50 can communicate with the bypass through but not limited to RS485 The AC switch 502 is connected to the DC bypass switch 504, and it can also be wireless transmission or other wired transmission means, respectively open (ON) the AC bypass switch 502 and the DC bypass switch 504, so that the DC-AC converter 24 Directly conduct with the photovoltaic array 20 and the AC output switch 28, and confirm whether the operation information of the DC-AC converter 24 is still in an offline state.

The monitoring device further includes an AC detection module 52 and a DC detection module 54. The AC detection module 52 is used to implement the monitoring method described in steps S306 to S314, and the DC detection module 54 is used to perform steps S316 to S314. The monitoring method described in S326.

According to one embodiment, the AC detection module 52 is connected to the controller 50 and the photoelectric conversion system, and receives a control signal from the controller 50. The controller 50 can communicate with the AC detection module through but not limited to RS485 52 connection, can also be wireless transmission or other means of wired transmission, the AC detection module 52 includes at least one AC voltage detection port 522 and at least one AC current detection port 524 . The AC voltage detection port 522 is used to detect the AC voltage state of the AC working module 26, and the AC current detection port 524 is used to detect the AC current state of the AC working module 26 (please refer to the above steps S306 to S314 ).

Wherein, the number of AC voltage detection ports 522 and AC current detection ports 524 corresponds to the number of DC-to-AC converters 24 .

Wherein, the AC voltage detection port 522 is respectively connected to a first AC voltage polling position ACV+ and a second AC voltage polling position ACV- of the AC working module 26, which are used to sense the first AC voltage polling position ACV-. The polling position ACV+ and the second AC voltage polling position ACV- are voltages at two points. Wherein, as shown in FIG. 5A, the first AC voltage polling position ACV+ can be defined as the first loop between the DC-to-AC converter 24 and the AC working module 26, and the second AC voltage polling position ACV- can be defined as The second loop is between the DC-AC converter 24 and the AC working module 26 .

Wherein, the AC current detection port 524 is connected to a first AC current polling position ACA+ between the DC-to-AC converter 24 and the AC working module 26 and a The second AC current polling position ACA-.

According to one embodiment, the DC detection module 54 is connected to the controller 50 and the photoelectric conversion system, and receives a control signal transmitted from the controller 50. The controller 50 can communicate with the DC detection module through but not limited to RS485 54 connection, also can be the means of wireless transmission or other wired transmission. The DC detection module 54 includes at least one DC voltage detection port 542 and at least one DC current detection port 544, the DC voltage detection port 542 is used to detect the DC voltage state of the DC working module 22, and the DC current detection port 544 is It is used to detect the state of the DC current of the DC working module 22 (please refer to the above steps S306 to S314).

Wherein, the number of DC voltage detection ports 542 corresponds to the number of fuses 222 connected to the photovoltaic array 20 . The DC current detection port 544 corresponds to the number of DC shunts 220 . For example, when the monitoring device is applied to a 7-series and 3-parallel photoelectric conversion system (as shown in FIG. 2 ), the number of DC voltage detection ports 542 is three.

Wherein, the DC voltage detection port 542 is respectively connected to a first DC voltage polling position DCV+ and a second DC voltage polling position DCV−. As shown in FIG. 5 , the first DC voltage polling position DCV+ is defined as between the fuse 222 and the DC shunt 220 in the DC working module 22 . The second DC voltage polling position DCV− is defined as the other end of the photovoltaic array 20 connected to the fuse 222 .

Wherein, the direct current detection port 544 is respectively connected to a first direct current polling position DCA+ and a second direct current polling position DCA-, as shown in FIG. 5, the first direct current polling position DCA+ and The second DC current polling location DCA− is defined as the two ends of the DC shunt 220 .

In addition, in one embodiment, the monitoring device further includes a network module 56, the network module 56 can transmit the operation information, DC current, DC voltage, AC current and AC voltage of the DC-to-AC converter 24 to an external Monitor (not shown in the figure).

Please refer to FIG. 5B , which is a schematic diagram of another embodiment of the monitoring device of the present invention. Basically, FIG. 5B is substantially the same as FIG. 5A , and the main difference lies in the application. FIG. 5A shows a single-phase AC monitoring application, while FIG. 5B shows a three-phase AC monitoring application.

As shown in FIG. 5B, the AC voltage detection port 522 is respectively connected to a first AC voltage polling position ACVR, a second AC voltage polling position ACVT, and a third AC voltage polling position ACVS of the AC working module 26. . The AC current detection port 524 is connected to a first AC current polling position ACAR+, a second AC current polling position ACAR-, a A third AC current polling position ACAT+, a fourth AC current polling position ACAT−, a fifth AC current polling position ACAS+, and a sixth AC current polling position ACAS−.

It can be clearly seen from FIG. 5A and FIG. 5B that the number of AC voltage detection ports 522 and AC current detection ports 524 is not only corresponding to the number of DC-to-AC converters 24, but also varies due to different applications such as single-phase AC power or three-phase AC power. different.

In addition, through the above description, those who are familiar with the technical field of this case must be able to understand that the monitoring device of the present invention can monitor the AC and DC circuits of other electronic systems. As previously described, when a lighting system has hundreds of LED street lamps, each LED street lamp has an independent AC-DC converter 24, an AC working module 26 and a DC working module 22, a controller 50, an AC detection module 52 and a DC detection module. The module 54 monitors them in sequence, and obtains the working status of the AC-DC converter 24 , the AC working module 26 and the DC working module 22 of each LED street lamp through direct power supply and AC-DC polling.

Please refer to FIG. 6 , which is a schematic diagram of another embodiment of the monitoring device of the present invention. The monitoring device of the present invention can also be extended to a home appliance system. As shown in FIG. 6 , a home appliance system has multiple DC power supply appliances and multiple AC power supply appliances, which are collectively defined as loads here. In this embodiment, the monitoring device includes a controller 50, the controller 50 includes at least one switch 506, one end of the switch 506 is connected to a load 60, and the other end of the switch 506 is connected to one of the power supplies to the load 60. The power supply 62 , wherein the controller 50 turns on or turns off the switch 506 according to an operation instruction, so as to turn on or turn off the load 60 correspondingly.

However, the operation instructions of the controller 50 can be implemented by adding a user interface, for example: an infrared receiver is set on the controller 50, and a user can pass an infrared transmitter (remote controller) through a coded language The decoding rule selects the corresponding load 60 (electrical appliance) to turn on or off.

Therefore, the monitoring device of the present invention passes through the control signal of the controller 50. The controller 50 can pass through but not limited to RS485 and the bypass AC switch 502, the DC bypass switch 504, the AC detection module 52 and the DC detection module 54 The connection can also be wireless transmission or other wired transmission means, respectively controlling the AC bypass switch 502, the DC bypass switch 504, the AC detection module 52 and the DC detection module 54, so as to achieve partitioning and segmenting. Detect each component in the overall system or actually drive and manage each component.

But the above are only preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, and all changes and modifications that are obvious to those with ordinary skills in the field of this case should be regarded as unreasonable. Deviate from the essence of the present invention.

Claims (14)

1. a kind of monitoring device, is applied to a photo-translating system, and the monitoring device includes a controller, and the controller passes through one Ammeter is connected to a mains system, and the controller includes an at least switch, and one end of the switch is connected to a load, the switch The other end be connected to for should load electric a power supply, wherein, the controller detect the mains system one power supply electricity Amount, and according to contract capacity rule, with the operational order on or off switch, the load is turned on and off with correspondence, Wherein The Jian Ce Installed put and further include:

One first exchange bypass cock, a first end of the first exchange bypass cock connect an alternate current operation module, and this first One second end of bypass cock then connects a load；And

One second exchange bypass cock, a first end of the second exchange bypass cock connect the ammeter, the second exchange bypass The one second end connection one of switch exchanges output switch；

Wherein, the controller detects the powering quantity of the mains system, and sends a control letter according to the contract capacity rule Number, carry out the on or off first exchange bypass cock second bypass cock is exchanged with this；

Wherein, when the powering quantity is higher than the contract capacity rule, the controller sends a control signal and turns on first friendship Stream bypass cock, and while end the second exchange bypass cock, make the powering quantity decline, allow a photovoltaic array to assist to this Load is powered.

2. monitoring device as claimed in claim 1, wherein, when the powering quantity recovers to less than contract capacity rule, Then the controller sends a control signal, turns on the second exchange bypass cock, and while ends the first exchange bypass cock.

3. a kind of monitoring method, is applied to a photo-translating system, and the photo-translating system has a photovoltaic array, a direct current work Making module, a DC-AC converter, an alternate current operation module and output switch being exchanged with one, the monitoring method includes：

One first operation information is obtained from the DC-AC converter, wherein, first operation information includes an off-line state, wrong The state of mistake and a normal condition；

When first operation information is off-line state, the DC-AC converter is simultaneously turned on the photovoltaic array and the orthogonal Stream transformer exchanges output switch with this；

One second operation information is obtained from the DC-AC converter, wherein, second operation information include an off-line state, one Error condition and a normal condition；And

When first operation information is all off-line state with second operation information, then the DC-AC converter failure is judged.

4. monitoring method as claimed in claim 3, wherein, this simultaneously turn on the DC-AC converter and the photovoltaic array and The step of DC-AC converter exchanges output switch with this, further includes：

Judge a photo-translating system time range residing at present；

When the time range is a daylight time, then the DC-AC converter is simultaneously turned on the photovoltaic array and the orthogonal stream Transducer exchanges output switch with this；And

When the time range is a certain evening hours, then ignore the off-line state of first operation information.

5. monitoring method as claimed in claim 3, separately includes：

When the second operation information is normal condition, disconnects the DC-AC converter and the photovoltaic array and this exchanges to export and opens Close；

The alternate current operation module is sensed to the exchange output switch with the presence or absence of there is an alternating voltage；

When the alternating voltage is not present, then one is assert from the mains system escape for being externally attached to the exchange output switch；

In the presence of the alternating voltage, then the alternate current operation module and the DC-AC converter are sensed with the presence or absence of there is an alternating current Stream；And

When the alternating current is not present, then judge that the alternate current operation module breaks down.

6. monitoring method as claimed in claim 5, separately includes：

Judge whether the photovoltaic array two ends concatenated with an electric fuse have a DC voltage；

When DC voltage is not present, assert that the photovoltaic array or the electric fuse break down；

In the presence of DC voltage, one of sensing direct current diverter DC current；

When the DC current is not present, a circuit breaker failure is assert；And

In the presence of DC current, DC-AC converter and the conducting for exchanging output switch are disconnected.

7. monitoring method as claimed in claim 6, separately includes：

In the presence of DC voltage, turn on the DC-AC converter and output switch is exchanged with this.

8. a kind of monitoring device, is applied to a photo-translating system, and the photo-translating system has a photovoltaic array, a direct current Operational module, a DC-AC converter, an alternate current operation module exchange output switch with one, and the monitoring device includes：

One controller, the controller include：

At least one exchange bypass cock, side connect the DC-AC converter and the alternate current operation module, and opposite side connects the friendship Stream output switch；

An at least direct current bypass cock, side connect one end of the photovoltaic array and the DC operation module, and opposite side connection should The other end of DC-AC converter and the DC operation module, wherein, the controller connects the DC-AC converter, to take An operation information of the DC-AC converter is obtained, and a corresponding control signal is sent according to the operation information.

9. monitoring device as claimed in claim 8, wherein, the operation information includes an off-line state, a normal condition and Error condition.

10. monitoring device as claimed in claim 8, wherein, the control signal include an exchange bypass cock open signal, one Exchange bypass cock shutdown signal, a direct current bypass cock open signal, a direct current bypass cock shutdown signal, an alternating voltage Detection signal, an alternating current detection signal, a direct current voltage detection signal and a direct current current detection signal.

11. monitoring devices as claimed in claim 8, separately include：

One exchange detection module, connects the controller and the alternate current operation module, and is received from the transmitted control of the controller Signal；And

One direct current detection module, connects the controller and the DC operation module, and is received from the transmitted control of the controller Signal.

12. monitoring devices as claimed in claim 11, wherein, the DC detecting module includes：

An at least direct current voltage detecting port, is connected to one first DC voltage poll position and one second unidirectional current pinch roller Ask position；And

An at least direct current detection port, is connected to one first DC current poll position and one second DC current poll bit Put.

13. monitoring devices as claimed in claim 11, wherein, the exchange detection module includes：

An at least alternating voltage detects port, be connected to one first alternating voltage poll position of the alternate current operation module with One second alternating voltage poll position, to sense the first alternating voltage poll position and the second alternating voltage poll bit Put 2 points of voltage；And

An at least alternating current detects port, is connected to one first alternating current poll position of the alternate current operation module with one the Two alternating current poll positions, to the alternating current for sensing the alternate current operation module.

14. monitoring devices as claimed in claim 11, wherein, the exchange detection module includes：

Three alternating voltages detect port, be connected to the alternate current operation module one first alternating voltage poll position, one the Two alternating voltage poll positions and one the 3rd alternating voltage poll position；And

Six alternating currents detect port, are connected to one first alternating current poll position, one second friendship of the alternate current operation module Stream electric current poll position, one the 3rd alternating current poll position, one the 4th alternating current poll position and one the 5th alternating current Poll position, one the 6th alternating current poll position, to the alternating current for sensing the alternate current operation module.