CN112630568B - Power quality detection device and method for power distribution station area - Google Patents
Power quality detection device and method for power distribution station area Download PDFInfo
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- CN112630568B CN112630568B CN202011469304.4A CN202011469304A CN112630568B CN 112630568 B CN112630568 B CN 112630568B CN 202011469304 A CN202011469304 A CN 202011469304A CN 112630568 B CN112630568 B CN 112630568B
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- 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
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- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
The invention provides a power quality detection device for a power distribution station area, which comprises a movable trolley and a carriage; a high-power detection module, a power connection module and an electric energy quality online detector are arranged in the carriage, and a distribution box is arranged outside the carriage; the high-power detection module is formed by a plurality of high-power detection lamp sets; the power connection switch in the power connection module is connected to the bottom ends of all power connection jacks and is also connected with a corresponding high-power detection lamp set, and the power connection jacks are electrically connected with a power supply box for supplying power to a distribution line in a distribution area to be detected; after the distribution box is communicated with the commercial power, the electric energy quality online detector starts to acquire the electric energy quality change condition of the distribution line when the electric energy consumption suddenly increases or decreases in real time and realizes online detection and display; the sudden increase or decrease of the power consumption is realized by simulating the sudden increase or decrease of the number of the power detection lamp sets by controlling the power switch. The invention has better maneuverability and controllability, and can accurately detect the power quality change conditions under different loads, thereby improving the overall detection efficiency.
Description
Technical Field
The invention relates to the technical field of power grid quality detection, in particular to a power quality detection device and method for a power distribution station area.
Background
In an electric power system, a transformer area refers to a power supply range or region of a transformer, which is a term for power economy operation management. At present, a power distribution network is facing the development trend of universal power electronization, and under the scenes of high-permeability new energy power generation, high-coverage electric automobile charging facilities, large-scale electric heating and a large amount of various novel loads, the nonlinearity and randomness of distribution network loads are intensified, and the power quality of a distribution network area is seriously influenced. Therefore, it is necessary to detect the quality of the power in the distribution area.
In the prior art, the power quality detection mode of the power distribution area is based on the actual power supply condition, and then the actual power supply quality in the power distribution area is summarized by combining with the automatic calculation and analysis of a computer, but the power quality detection mode has uncontrollable property and strong randomness, has a large defect in the actual detection process, and cannot accurately detect the power quality change condition of the power distribution area.
Therefore, a power quality detection device and method for a power distribution area are urgently needed, and the power quality detection device and method not only have better maneuverability and controllability, but also can accurately detect the power quality change conditions under different loads according to detection requirements, so that the overall detection efficiency is greatly improved.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a power quality detection apparatus and method for a distribution substation, which not only have better maneuverability and controllability, but also can accurately detect power quality changes under different loads according to detection requirements, so that the overall detection efficiency is greatly improved.
In order to solve the technical problem, an embodiment of the invention provides a power quality detection device for a distribution substation, which comprises a movable trolley and a carriage fixedly mounted above the movable trolley; wherein the content of the first and second substances,
the high-power detection module, the power connection module and the electric energy quality online detector are arranged in the carriage, and the distribution box is arranged outside the carriage;
the high-power detection module is connected with the distribution box and is formed by a plurality of high-power detection lamp sets;
the power connection module comprises a plurality of groups of power connection switches and a plurality of groups of power connection jacks; one end of each group of electric switches is connected with a corresponding high-power detection lamp group, and the other end of each group of electric switches is connected to the bottom ends of all the electric sockets; the top end of each group of power connection sockets is a port which is used for being electrically connected with a power supply box in a power distribution area to be detected through a corresponding detection lead; the power supply box is connected with a distribution line in a to-be-detected distribution area and supplies power;
the voltage end of the electric energy quality online detector is connected with the distribution box, and the data input end of the electric energy quality online detector is connected to a distribution circuit in a distribution area to be detected;
the electric energy quality online detector is used for starting to obtain the electric energy quality change condition of a distribution line in a distribution area to be detected under the condition of sudden increase or sudden decrease of the electric energy consumption in real time after the distribution box is communicated with a mains supply, and realizing online detection and display; the sudden increase or reduction of the power consumption is realized by simulating the sudden increase or reduction of the number of high-power detection lamp sets (25) loaded on a distribution line in a distribution area to be detected through the power supply box by controlling the on-off state of each set of electric switches on the power connection module.
Wherein, still include: a remote detection terminal and an antenna; wherein, the first and the second end of the pipe are connected with each other,
the remote detection terminal establishes wireless connection with the data output end of the electric energy quality on-line detector through the antenna pre-installed outside the carriage, realizes data communication, is used for receiving the electric energy quality change condition of the distribution line in the distribution area to be detected, which is acquired by the electric energy quality on-line detector in real time, when the power consumption is suddenly increased or decreased, and carries out remote detection and analysis.
The carriage is provided with a roller shutter protection door used for shielding the high-power detection module, the power connection module and the electric energy quality on-line detector.
Wherein, one end of the moving trolley is provided with a hook.
The power quality change condition comprises dynamic values and a dynamic distribution diagram corresponding to each dynamic value; wherein the dynamic numerical values include a harmonic value, an interharmonic value, a voltage fluctuation value, and a voltage and current balance value.
The embodiment of the invention also provides a power distribution station electric energy quality detection method, which is characterized by being implemented on the power distribution station electric energy quality detection device, and the method comprises the following steps:
after determining that a distribution box on the power quality detection device of the distribution area is communicated with a mains supply, a certain group of power connection jacks on the distribution box are electrically connected with a power supply box in the distribution area to be detected through corresponding detection leads, and an on-line power quality detector on the distribution box is connected to a distribution circuit in the distribution area to be detected, starting the on-line power quality detector;
the on-off state of each group of electric switches in the electric module on the power quality detection device of the power distribution area is controlled, so that the sudden increase or reduction of the number of high-power detection lamp sets loaded on a power distribution line in the power distribution area to be detected is simulated to realize the sudden increase or reduction of the power consumption of the power distribution line in the power distribution area to be detected, the electric energy quality online detector is made to acquire the electric energy quality change condition of the power distribution line in the power distribution area to be detected in real time when the power consumption is in the sudden increase or reduction condition, and online detection and display are realized.
Wherein the method further comprises:
and transmitting the electric energy quality change condition of the distribution line in the distribution area to be detected, which is acquired by the electric energy quality online detector in real time, in the sudden increase or sudden decrease condition of the electric energy consumption to a remote detection terminal, and performing remote detection and analysis.
The power quality change condition comprises dynamic values and a dynamic distribution graph corresponding to each dynamic value; wherein the dynamic numerical values include a harmonic value, an interharmonic value, a voltage fluctuation value, and a voltage and current balance value.
The embodiment of the invention has the following beneficial effects:
the electric energy quality detection device is an online movable detection device, not only has better maneuverability and controllability, but also can accurately detect the electric energy quality change condition under different loads (sudden increase or sudden decrease of the electric energy consumption) by suddenly increasing or suddenly decreasing high-power electric consumption equipment (such as a high-power detection lamp group) according to the detection requirement, thereby greatly improving the overall detection efficiency, simultaneously, a remote detection terminal can also quickly obtain the electric energy quality of the distribution circuit in the distribution area, and overcoming the larger defect in the actual detection process of the prior art.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a power quality detection apparatus for a power distribution area according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the logic structure of FIG. 1;
fig. 3 is a flowchart of a power quality detection method for a power distribution area according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, in an embodiment of the present invention, a power quality detection apparatus for a distribution substation includes a mobile cart 1 and a car 2 fixedly installed above the mobile cart 1; wherein the content of the first and second substances,
the interior of the carriage 2 is provided with a high-power detection module 21, a power connection module 22 and an electric energy quality online detector 23, and the exterior is provided with a distribution box 24; the carriage 2 is further provided with a rolling shutter protective door 27 (namely, a carriage door) for shielding the high-power detection module 21, the power connection module 22 and the electric energy quality online detector 23, and the rolling shutter protective door is used for dust prevention, theft prevention and the like; the distribution box 24 is connected to a commercial power (not shown);
the high-power detection module 21 is connected with a distribution box 24 and is formed by a plurality of high-power detection lamp groups 25; wherein, the high-power detection lamp group 25 is distributed on the surface of the high-power detection module 21 according to a certain rule, for example, distributed in a row-column matrix manner, so as to facilitate observation;
the power connection module 22 comprises a plurality of power connection switches T and a plurality of power connection sockets C; one end of each group of electric switches T is connected with a corresponding high-power detection lamp group 25, and the other end of each group of electric switches T is connected to the bottom ends of all the electric sockets; the top end of each group of power connection sockets C is a port which is used for being electrically connected with a power supply box (not shown) in a power distribution area to be detected through a corresponding detection lead; the power supply box is connected with a distribution line in a distribution area to be detected and supplies power, so that the power consumption of the distribution line can be increased or reduced;
the voltage end of the electric energy quality online detector 23 is connected with the distribution box 24, and the data input end is connected with a distribution line (not shown) in a distribution station area to be detected;
the electric energy quality online detector 23 is used for starting to obtain the electric energy quality change condition of a distribution line in a distribution area to be detected under the condition of sudden increase or sudden decrease of the electric energy consumption in real time after the distribution box 24 is communicated with the commercial power, and realizing online detection and display; wherein, the sudden increase or decrease of the power consumption is realized by controlling the on-off state of each group of electric switches T on the power connection module 22, so that the sudden increase or sudden decrease of the number of the high-power detection lamp groups 25 loaded on the distribution line in the distribution area to be detected through the power supply box is simulated; the power quality change condition comprises dynamic values and a dynamic distribution map corresponding to each dynamic value; dynamic values include, but are not limited to, harmonic values, interharmonic values, voltage ripple values, voltage and current balance values.
In the embodiment of the present invention, when the detection is started, the power switch T corresponding to the power connection module 22 is turned on to connect the power supplies of the corresponding portions of the high-power detection lamp sets 25 on the high-power detection module 21, so that the high-power detection lamp sets 25 connected to the power supplies all start to work suddenly, thereby realizing the sudden increase of the power consumption of the distribution line, and observing and storing the related power quality change conditions on the power quality on-line detector 23.
For another example, all the power connection switches T on the power connection module 22 are suddenly turned on, so that all the high-power detection lamp sets 25 on the high-power detection module 21 start to work synchronously, thereby further increasing the power consumption of the distribution line, and observing and storing the related power quality change condition on the power quality on-line detector 23.
For another example, after all the power connection switches T are turned on, the power connection switches T on the power connection module 22 are turned off suddenly, so that the high-power detection lamp set 25 on the high-power detection module 21, which corresponds to the power connection switches T that are not turned off, is kept working, the sudden power consumption reduction condition of the distribution line is realized, and the related power quality change condition on the power quality online detector 23 is observed and stored.
In summary, as long as the on-off state of each group of the electric switches T on the electric connection module 22 is controlled, the sudden increase or sudden decrease of the number of the high-power detection lamp groups 25 is used to simulate the sudden increase or sudden decrease of the power consumption of the distribution line in the distribution area to be detected, so that the electric energy quality online detector 23 can obtain the electric energy quality change conditions of the distribution line in the distribution area to be detected under different loads in real time, and realize online detection and display.
In the embodiment of the invention, the power quality of the distribution lines in the distribution station area can be remotely and quickly obtained and further analyzed. Therefore, this distribution station power quality detection device still includes: the remote sensing terminal 3 and antenna 26; the remote detection terminal 3 establishes wireless connection with the data output end of the electric energy quality online detector 23 through the antenna 26 pre-installed outside the carriage 2, realizes data communication, is used for receiving the electric energy quality change condition of the distribution line in the distribution area to be detected, which is acquired by the electric energy quality online detector 23 in real time, when the electric energy consumption is suddenly increased or decreased, and performs remote detection and analysis. The antenna 26 is connected with the data output end of the electric energy quality online detector 23 through a data wire.
In the embodiment of the invention, in order to enable the power quality detection device of the distribution station area to quickly reach a detection site, a hook 28 is arranged at one end of the movable trolley 1 so as to be convenient to drag.
The working principle of the power quality detection device for the power distribution station area in the embodiment of the invention is that firstly, the movable trolley 1 is quickly dragged to a detection site; secondly, a certain group of power connection sockets C on the power connection module 22 are electrically connected with a power supply box (not shown) in the power distribution area to be detected through corresponding detection wires, and meanwhile, the electric energy quality online detector 23 is connected on a power distribution circuit in the power distribution area to be detected; then, the distribution box 24 is connected to the commercial power, and the online power quality detector 23 is started.
At this time, the electric energy quality change condition when the electric energy consumption of the distribution line in the distribution area to be detected is not changed can be obtained through the electric energy quality online detector 23, and online detection and display are realized.
If the power quality change condition during the sudden increase or decrease of the power consumption needs to be detected, a certain part of the high-power detection lamp set 25 on the high-power detection module 21 can suddenly start to work by starting the corresponding power switch T on the power connection module 22; or, all the power connection switches T on the power connection module 22 are turned on, so that all the high-power detection lamp sets 25 on the high-power detection module 21 start to work suddenly, so as to simulate the sudden increase of the power consumption of the distribution line in the distribution area to be detected, obtain the power quality change condition when the power consumption of the distribution line in the distribution area to be detected increases through the power quality online detector 23, and realize online detection and display. And (c) a second step of,
when all the power connection switches T are turned on, the corresponding power connection switches T on the power connection module 22 can be turned off, so that some part of the high-power detection lamp sets 25 on the high-power detection module 21 are suddenly interrupted to simulate the sudden decrease of the power consumption of the distribution lines in the distribution area to be detected, and the power quality change condition when the sudden decrease of the power consumption of the distribution lines in the distribution area to be detected is obtained through the power quality online detector 23, and online detection and display are realized.
Of course, in order to further obtain more detailed analysis data, the remote detection terminal 3 may receive the power quality change condition of the distribution line in the distribution area to be detected, which is obtained by the online power quality detector 23 in real time under the condition of sudden increase or sudden decrease of power consumption, and perform remote detection and analysis.
As shown in fig. 3, in an embodiment of the present invention, a power distribution station power quality detection method is provided, which is implemented on the foregoing power distribution station power quality detection apparatus, and includes the following steps:
step S1, after determining that a distribution box on the power quality detection device of the distribution area is communicated with a mains supply, a certain group of power connection jacks on the distribution box are electrically connected with a power supply box in the distribution area to be detected through corresponding detection leads, and an on-line power quality detector on the distribution box is connected to a distribution circuit in the distribution area to be detected, starting the on-line power quality detector;
s2, controlling the on-off state of each group of electric switches in the electric power quality detection device of the power distribution area, so that the sudden increase or sudden decrease of the number of high-power detection lamp groups loaded on the power distribution line in the power distribution area to be detected simulates the situation of sudden increase or sudden decrease of the power consumption of the power distribution line in the power distribution area to be detected, the electric power quality online detector obtains the electric power quality change situation of the power distribution line in the power distribution area to be detected in real time when the power consumption is in the situation of sudden increase or sudden decrease, and online detection and display are realized.
Wherein the method further comprises:
and transmitting the electric energy quality change condition of the distribution line in the distribution area to be detected, which is acquired by the electric energy quality online detector in real time, in the sudden increase or decrease condition of the electric energy consumption to a remote detection terminal, and performing remote detection and analysis.
The power quality change condition comprises dynamic values and a dynamic distribution diagram corresponding to each dynamic value; wherein the dynamic numerical values include a harmonic value, an interharmonic value, a voltage fluctuation value, and a voltage and current balance value.
The embodiment of the invention has the following beneficial effects:
the electric energy quality detection device is an online movable detection device, not only has better maneuverability and controllability, but also can accurately detect the electric energy quality change condition under different loads (sudden increase or sudden decrease of the electric energy consumption) by suddenly increasing or suddenly decreasing high-power electric consumption equipment (such as a high-power detection lamp group) according to the detection requirement, thereby greatly improving the overall detection efficiency, simultaneously, a remote detection terminal can also quickly obtain the electric energy quality of the distribution circuit in the distribution area, and overcoming the larger defect in the actual detection process of the prior art.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by relevant hardware instructed by a program, and the program may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (8)
1. The power quality detection device for the power distribution station is characterized by comprising a movable trolley (1) and a carriage (2) fixedly mounted above the movable trolley (1); wherein the content of the first and second substances,
a high-power detection module (21), a power connection module (22) and an electric energy quality online detector (23) are arranged in the carriage (2), and a distribution box (24) is arranged outside the carriage;
the high-power detection module (21) is connected with the distribution box (24) and is formed by a plurality of high-power detection lamp groups (25);
the power connection module (22) comprises a plurality of groups of power connection switches and a plurality of groups of power connection sockets; one end of each group of electric switches is connected with a corresponding high-power detection lamp group (25), and the other end of each group of electric switches is connected to the bottom ends of all the electric sockets; the top end of each group of power connection sockets is a port which is used for being electrically connected with a power supply box in a power distribution area to be detected through a corresponding detection lead; the power supply box is connected with a distribution line in a to-be-detected distribution area and supplies power;
the voltage end of the electric energy quality online detector (23) is connected with the distribution box (24), and the data input end is connected to a distribution line in a distribution area to be detected;
the electric energy quality online detector (23) is used for starting to acquire the electric energy quality change condition of a distribution line in a distribution area to be detected under the condition of sudden increase or sudden decrease of the electric energy consumption in real time after the distribution box (24) is communicated with the mains supply, and realizing online detection and display; the sudden increase or reduction of the power consumption is realized by simulating the sudden increase or reduction of the number of high-power detection lamp sets (25) loaded on a distribution line in a distribution area to be detected through the power supply box by controlling the on-off state of each set of electric switches on the power connection module (22).
2. The distribution substation power quality detection apparatus of claim 1, further comprising: a remote detection terminal (3) and an antenna (26); wherein the content of the first and second substances,
the remote detection terminal (3) is used for receiving the electric energy quality change condition of the distribution line in the distribution area to be detected, acquired by the electric energy quality online detector (23) in real time, when the electric energy consumption is increased suddenly or decreased suddenly, and carrying out remote detection and analysis through the antenna (26) which is installed in advance outside the carriage (2) and the data output end of the electric energy quality online detector (23) to establish wireless connection and realize data communication.
3. The power quality detection device of the distribution substation according to claim 2, characterized in that the carriage (2) is provided with a rolling shutter protection door (27) for shielding the high-power detection module (21), the power connection module (22) and the online power quality detector (23).
4. The power distribution station power quality detection device according to claim 3, characterized in that one end of the moving trolley (1) is provided with a hook (28).
5. The distribution substation power quality detection device of claim 4, wherein the power quality variation comprises dynamic values and a dynamic profile corresponding to each dynamic value; wherein the dynamic numerical values include a harmonic value, an interharmonic value, a voltage fluctuation value, and a voltage and current balance value.
6. A power distribution substation power quality detection method implemented on the power distribution substation power quality detection apparatus of claim 4, the method comprising the steps of:
after determining that a distribution box on the power quality detection device of the distribution area is communicated with a mains supply, a certain group of power connection jacks on the distribution box are electrically connected with a power supply box in the distribution area to be detected through corresponding detection leads, and an on-line power quality detector on the distribution box is connected to a distribution circuit in the distribution area to be detected, starting the on-line power quality detector;
the on-off state of each group of electric switches in the electric module is connected to the power distribution area electric energy quality detection device in a control mode, so that the sudden increase or sudden decrease of the number of high-power detection lamp groups loaded on a distribution line in the to-be-detected power distribution area simulates the situation of sudden increase or sudden decrease of the power consumption of the distribution line in the to-be-detected power distribution area, the electric energy quality on-line detector obtains the electric energy quality change situation of the distribution line in the to-be-detected power distribution area in real time when the situation of the sudden increase or sudden decrease of the power consumption is achieved, and on-line detection and display are achieved.
7. The distribution substation power quality detection method of claim 6, the method further comprising:
and transmitting the electric energy quality change condition of the distribution line in the distribution area to be detected, which is acquired by the electric energy quality online detector in real time, in the sudden increase or decrease condition of the electric energy consumption to a remote detection terminal, and performing remote detection and analysis.
8. The power quality detection method for distribution substations according to claim 7, wherein the power quality variation condition includes dynamic values and a dynamic distribution map corresponding to each dynamic value; wherein the dynamic numerical values include a harmonic value, an interharmonic value, a voltage fluctuation value, and a voltage and current balance value.
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