CN111817341A - Bypass device for grid-connected test - Google Patents
Bypass device for grid-connected test Download PDFInfo
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- CN111817341A CN111817341A CN202010586155.3A CN202010586155A CN111817341A CN 111817341 A CN111817341 A CN 111817341A CN 202010586155 A CN202010586155 A CN 202010586155A CN 111817341 A CN111817341 A CN 111817341A
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- bypass switch
- bypass
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- 238000012360 testing method Methods 0.000 title claims abstract description 98
- 238000010248 power generation Methods 0.000 claims abstract description 28
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The application discloses a bypass device for grid connection test, which comprises a first bypass switch, a second bypass switch and a control module; the input ends of the first bypass switch and the second bypass switch are used for being connected with a testing device or a power grid; the first bypass switch and the second bypass switch are connected with the new energy power generation equipment to be tested; the control module is configured to output a bypass switch control signal according to the working module and the bypass signal; the bypass switch control signal is used for controlling the conduction or the disconnection of the first bypass switch and the second bypass switch. When a testing device breaks down or is normally stopped, the bypass of the tested new energy power generation equipment is connected to a power grid, so that the continuous grid-connected power generation operation of the new energy power generation equipment during testing is realized, and the economic benefit of the new energy power generation equipment during testing is improved; and meanwhile, when the capacity of the testing device is insufficient, the two testing devices are connected in parallel, so that the capacity expansion of the testing device is realized, and the device is used for grid-connected testing of high-capacity new energy power generation equipment.
Description
Technical Field
The application relates to the technical field of power electronics, in particular to a bypass device for grid-connected testing.
Background
With the continuous increase of the occupation ratio of new energy power generation in an electric power system, in order to meet the requirement of safe and stable operation of the electric power system, the electric power industry puts forward higher requirements on the grid-connected performance of new energy power generation equipment and a system thereof, and the power grid adaptability test and the high-low voltage ride through capability test of the power generation equipment are generally required before the grid-connected power generation of a newly-built power station.
Under the background, various domestic enterprises develop a power grid adaptability test device capable of simulating voltage deviation, frequency deviation, three-phase voltage unbalance, voltage fluctuation and flicker, and power grid harmonic waves and a high-low voltage ride through test device for simulating power grid faults. In the practical test application process, the test device is generally directly connected in series between a power grid and the new energy power generation equipment to be tested, and the new energy power generation equipment to be tested is completely powered by the test device during the test. When the testing device breaks down or is normally shut down, the tested new energy power generation equipment cannot continuously generate power and run, the tested new energy power generation equipment cannot be fully utilized to generate power cleanly, and the economic benefit of the new energy power generation equipment during testing is reduced.
Disclosure of Invention
In view of the above, the application provides a bypass device for grid-connected testing, which aims to connect a bypass of a tested new energy power generation device to a power grid when a testing device fails or is normally shut down, so that continuous grid-connected power generation operation of the new energy power generation device during testing is realized, and the economic benefit of the new energy power generation device during testing is improved; and meanwhile, when the capacity of the testing device is insufficient, the two testing devices are connected in parallel, so that the capacity expansion of the testing device is realized, and the device is used for grid-connected testing of high-capacity new energy power generation equipment.
According to one aspect of the application, a bypass device for grid connection test is provided, which comprises a first bypass switch, a second bypass switch and a control module;
the input ends of the first bypass switch and the second bypass switch are used for being connected with a testing device or a power grid; the output ends of the first bypass switch and the second bypass switch are connected together and then are connected with the new energy power generation equipment to be tested;
the control module is configured to output a bypass switch control signal according to the working module and a bypass signal; the bypass switch control signal is used for controlling the first bypass switch and the second bypass switch to be switched on or switched off.
In one embodiment, the controller includes an operation mode setting unit and a bypass switch control unit;
the working mode setting unit is used for receiving input of a user to determine the working module;
and the bypass switch control unit is used for outputting a bypass switch control signal according to the working module and the bypass signal.
In one embodiment, the operation mode setting unit is composed of a multi-position selection switch and a relay; the bypass switch control unit is composed of a programmable logic controller, a relay and an operation power supply.
In one embodiment, the test device comprises a high-low voltage ride through test device or a power grid adaptability test device.
In one embodiment, the bypass signal comprises at least one of: the test device is in failure and stops normally.
In one embodiment, an input end of the first bypass switch is connected with a testing device, and an input end of the second bypass switch is connected with a power grid;
or the input end of the first bypass switch is connected with the power grid, and the input end of the second bypass switch is connected with the testing device;
or the input ends of the first bypass switch and the second bypass switch are both connected with a testing device.
In one embodiment, the bypass switch control signal is configured to control the first bypass switch to turn off when the input of the first bypass switch is connected to the testing device and the input of the second bypass switch is connected to the grid.
In one embodiment, the bypass switch control signal is configured to control the second bypass switch to turn off when the input of the first bypass switch is connected to the grid and the input of the second bypass switch is connected to the testing device.
In one embodiment, when the input terminals of the first bypass switch and the second bypass switch are both connected to the test device, the bypass switch control signal is used to control the first bypass switch and the second bypass switch to be turned on or off simultaneously.
According to the bypass device for grid-connected test, when the test device fails or is normally stopped, the tested new energy power generation equipment is connected to the power grid in a bypass mode, continuous grid-connected power generation operation of the new energy power generation equipment during the test is achieved, and economic benefits of the new energy power generation equipment during the test are improved; and meanwhile, when the capacity of the testing device is insufficient, the two testing devices are connected in parallel, so that the capacity expansion of the testing device is realized, and the device is used for grid-connected testing of high-capacity new energy power generation equipment.
Drawings
Fig. 1 is a schematic diagram of a bypass device for grid connection testing according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram illustrating a connection between a bypass device for grid connection test, a power grid and a test device according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram illustrating a connection between a bypass device for grid connection test and a test device 1 and a test device 2 according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a high-low voltage ride through test apparatus according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a power grid adaptability testing apparatus provided in an embodiment of the present application.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer and clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Example one
As shown in fig. 1, the embodiment of the present application provides a bypass device for grid connection test, including a first bypass switch 10, a second bypass switch 20, and a control module 30;
the input end 101 of the first bypass switch 10 and the input end 201 of the second bypass switch 20 are both used for connecting with a testing device or a power grid; the output end 102 of the first bypass switch and the output end 202 of the second bypass switch 20 are connected together (shown as OUT in the figure) and then are connected with the new energy power generation equipment to be tested;
the control module 30 is configured to output a bypass switch control signal based on the operational module and the bypass signal; the bypass switch control signal is used to control the turning on or off of the first bypass switch 10 and the second bypass switch 20.
In this example, the controller 30 includes an operation mode setting unit 301 and a bypass switch control unit 302;
the working mode setting unit 301 is configured to receive an input from a user to determine the working module;
the bypass switch control unit 302 is configured to output a bypass switch control signal according to the working module and the bypass signal.
Wherein, the operation mode setting unit 301 is composed of a multi-bit selection switch and a relay; the bypass switch control unit 302 is composed of a programmable logic controller, a relay, and an operation power supply.
In this example, the test device includes a high-low voltage ride through test device or a grid adaptability test device.
As shown in fig. 4, the high-low voltage ride through testing device includes switches K1-K3, a current-limiting reactor X1, a short-circuit reactor X2, and a reactive capacitor X3.
As shown in fig. 5, the power grid adaptability testing device includes a three-phase multi-winding transformer, a power module array and its controller, and an input filter.
Example two
Referring to fig. 2, in the present example, the input terminal 101 of the first bypass switch 10 is connected to the power grid, and the input terminal 201 of the second bypass switch 20 is connected to the testing device. At this time, the working module of the bypass device for grid connection test is in a bypass working mode. When the test apparatus fails or is normally shut down, the bypass switch control unit 302 outputs a bypass switch control signal to control the second bypass switch 20 to turn off according to the bypass operation module and the bypass signal (i.e. the test apparatus fails or is normally shut down).
EXAMPLE III
Similar to fig. 2, in the present embodiment, the input terminal 101 of the first bypass switch 10 may be connected to a testing device, and the input terminal 201 of the second bypass switch 20 may be connected to a power grid. . At this time, the working module of the bypass device for grid connection test is in a bypass working mode. When the test device fails or is normally shut down, the bypass switch control unit 302 outputs a bypass switch control signal to control the first bypass switch 10 to turn off according to the bypass operation module and the bypass signal (i.e. the test device fails or is normally shut down).
Referring to fig. 3, in an example, the input terminal 101 of the first bypass switch 10 is connected to the testing apparatus 1, and the input terminal 201 of the second bypass switch 20 is connected to the testing apparatus 2. At this time, the working module of the bypass device for grid connection test is in a parallel working mode. When the test device fails or is normally shut down, the bypass switch control unit 302 outputs a bypass switch control signal to control the first bypass switch 10 and the second bypass switch 20 to be turned off simultaneously according to the bypass operation module and the bypass signal (i.e. the test device fails or is normally shut down).
The preferred embodiments of the present application have been described above with reference to the accompanying drawings, and are not intended to limit the scope of the claims of the application accordingly. Any modifications, equivalents and improvements which may occur to those skilled in the art without departing from the scope and spirit of the present application are intended to be within the scope of the claims of the present application.
Claims (9)
1. A bypass device for grid connection test is characterized by comprising a first bypass switch, a second bypass switch and a control module;
the input ends of the first bypass switch and the second bypass switch are used for being connected with a testing device or a power grid; the output ends of the first bypass switch and the second bypass switch are connected together and then are connected with the new energy power generation equipment to be tested;
the control module is configured to output a bypass switch control signal according to the working module and a bypass signal; the bypass switch control signal is used for controlling the first bypass switch and the second bypass switch to be switched on or switched off.
2. The bypass device for grid connection test according to claim 1, wherein the controller comprises an operation mode setting unit and a bypass switch control unit;
the working mode setting unit is used for receiving input of a user to determine the working module;
and the bypass switch control unit is used for outputting a bypass switch control signal according to the working module and the bypass signal.
3. The bypass device for grid connection test according to claim 2, wherein the operation mode setting unit is composed of a multi-position selection switch and a relay; the bypass switch control unit is composed of a programmable logic controller, a relay and an operation power supply.
4. The bypass device for grid-connected test according to claim 1, wherein the test device comprises a high-low voltage ride through test device or a power grid adaptability test device.
5. The bypass device for grid-tie testing according to claim 1, wherein the bypass signal comprises at least one of: the test device is in failure and stops normally.
6. The bypass device for grid-connection test according to any one of claims 1 to 5,
the input end of the first bypass switch is connected with the testing device, and the input end of the second bypass switch is connected with the power grid;
or the input end of the first bypass switch is connected with the power grid, and the input end of the second bypass switch is connected with the testing device;
or the input ends of the first bypass switch and the second bypass switch are both connected with a testing device.
7. The bypass device for grid connection test according to claim 6, wherein when the input terminal of the first bypass switch is connected to the test device and the input terminal of the second bypass switch is connected to the grid, the bypass switch control signal is used to control the first bypass switch to be turned off.
8. The bypass device for grid connection test according to claim 6, wherein when the input terminal of the first bypass switch is connected to a power grid and the input terminal of the second bypass switch is connected to a test device, the bypass switch control signal is used to control the second bypass switch to be turned off.
9. The bypass device for grid connection testing according to claim 6, wherein when the input terminals of the first bypass switch and the second bypass switch are both connected to the testing device, the bypass switch control signal is used to control the first bypass switch and the second bypass switch to be simultaneously turned on or off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010586155.3A CN111817341A (en) | 2020-06-24 | 2020-06-24 | Bypass device for grid-connected test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010586155.3A CN111817341A (en) | 2020-06-24 | 2020-06-24 | Bypass device for grid-connected test |
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| Publication Number | Publication Date |
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| CN111817341A true CN111817341A (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010586155.3A Pending CN111817341A (en) | 2020-06-24 | 2020-06-24 | Bypass device for grid-connected test |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012178535A (en) * | 2011-02-04 | 2012-09-13 | Sharp Corp | Photovoltaic power generation system, switching system and bypass device |
| CN203858343U (en) * | 2014-05-23 | 2014-10-01 | 国家电网公司 | Primary system of integrated high and low voltage ride through test system |
| WO2015176687A1 (en) * | 2014-05-23 | 2015-11-26 | 国家电网公司 | Integrated high and low voltage ride through test system |
| CN205958659U (en) * | 2016-06-12 | 2017-02-15 | 郑州科技学院 | High voltage passes through testing arrangement |
-
2020
- 2020-06-24 CN CN202010586155.3A patent/CN111817341A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012178535A (en) * | 2011-02-04 | 2012-09-13 | Sharp Corp | Photovoltaic power generation system, switching system and bypass device |
| CN203858343U (en) * | 2014-05-23 | 2014-10-01 | 国家电网公司 | Primary system of integrated high and low voltage ride through test system |
| WO2015176687A1 (en) * | 2014-05-23 | 2015-11-26 | 国家电网公司 | Integrated high and low voltage ride through test system |
| CN205958659U (en) * | 2016-06-12 | 2017-02-15 | 郑州科技学院 | High voltage passes through testing arrangement |
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