CN218243113U - Power quality monitoring and control system for power distribution network - Google Patents
Power quality monitoring and control system for power distribution network Download PDFInfo
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- CN218243113U CN218243113U CN202222808585.2U CN202222808585U CN218243113U CN 218243113 U CN218243113 U CN 218243113U CN 202222808585 U CN202222808585 U CN 202222808585U CN 218243113 U CN218243113 U CN 218243113U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- 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
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The utility model discloses a power quality monitoring and control system of a power distribution network, which relates to the technical field of power quality monitoring and control, and comprises a central controller, a power quality monitoring module and a power quality regulation and control module which are connected in sequence, wherein the power quality monitoring module and the power quality regulation and control module are connected with the power distribution network; the electric energy quality monitoring module comprises a signal acquisition unit, an analog-to-digital converter and a processor which are connected in sequence; the signal acquisition unit comprises a three-phase current transformer, a three-phase voltage transformer, a temperature sensor and a fault recorder connected with the three-phase current transformer and the three-phase voltage transformer; the electric energy quality regulation and control module comprises a filtering module, a compensation module and a voltage regulation and control module. The utility model discloses can be fast effectual detect out the electric energy quality problem in the distribution network to carry out pertinence electric energy quality to gained electric energy quality problem and regulate and control, improve power supply quality and power supply reliability.
Description
Technical Field
The utility model relates to an electric energy quality monitoring and control technology field, more specifically the utility model relates to a distribution network electric energy quality monitoring and control system that says so.
Background
With the development of power supplies of power systems, users and enterprises have higher and higher requirements on the quality of electric energy. The problem of electric energy quality is increasingly prominent along with the wide application of high-power electronic devices, and the problems of harmonic pollution, insufficient reactive power and the like caused by the problem not only cause the waste of electric energy, but also influence the safe operation of an electric power system.
The electric energy quality problems of harmonic waves, voltage fluctuation and the like not only can influence the normal operation of certain complex precision equipment accessed into the same power distribution network, cause certain economic loss to power utilization enterprises, but also can cause extra electric energy waste, even can influence the metering of an electric energy metering device, and cause unnecessary disputes for both power supply and power utilization parties. If the problem of power quality is not solved timely and effectively, a great amount of economic loss will be caused.
Therefore, how to rapidly and effectively detect the power quality problem in the power distribution network and perform targeted power quality control on the obtained power quality problem is a problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a distribution network electric energy quality monitoring and control system.
In order to realize the purpose, the utility model adopts the following technical scheme:
a power quality monitoring and control system of a power distribution network comprises a central controller, a power quality monitoring module and a power quality regulation and control module which are sequentially connected, wherein the power quality monitoring module and the power quality regulation and control module are both connected with the power distribution network;
the electric energy quality monitoring module comprises a signal acquisition unit, an analog-to-digital converter and a processor which are connected in sequence; the signal acquisition unit is used for acquiring power load data in the power distribution network; the analog-to-digital converter is used for converting the collected power load data into binary discrete signals which are identified by the processor; the processor is used for calculating the power quality parameters of the power distribution network according to the power load data and sending a control instruction to the power quality regulation and control module;
the electric energy quality regulation and control module comprises a filtering module, a compensation module and a voltage regulation and control module; the filtering module is used for filtering the voltage; the compensation module is used for performing reactive power compensation; the voltage regulation and control module is used for regulating voltage.
Optionally, the central controller, the power quality monitoring module and the power quality control module are connected through a communication unit, and the communication unit is a micropower wireless communication unit or a power carrier communication unit.
Optionally, the signal acquisition unit includes a three-phase current transformer, a three-phase voltage transformer, a temperature sensor and a fault recorder connected with the three-phase current transformer and the three-phase voltage transformer.
Optionally, the signal acquisition unit is connected with a three-phase conductive cable of the power distribution network.
Optionally, the filtering module is an active power filter.
Optionally, the compensation module is a reactive compensator.
Optionally, the voltage regulation and control module is a dynamic voltage regulator.
Optionally, the system further comprises a display and an alarm, which are respectively connected with the central controller; the display is used for displaying the signals collected by the power quality monitoring module and the power quality parameters obtained by the processing of the processor; the alarm is used for giving an alarm.
According to the above technical scheme, the utility model provides a distribution network power quality monitoring and control system compares with prior art, has following beneficial effect:
(1) The utility model discloses on the basis of current power quality monitoring method, further introduce devices such as temperature sensor and trouble oscillograph, on the one hand, for central controller provides more power quality influence factor data, for adjusting power quality provides more modes, on the other hand, can take place the data of front and back to the trouble through the trouble oscillograph and take notes to carry out subsequent demonstration or storage in transmitting relevant trouble information to central controller, can be more comprehensive observe distribution network power supply data.
(2) The utility model discloses a filtering module, compensation module, voltage regulation and control module carry out many-sided pertinence regulation and control to electric energy quality, can in time solve the electric energy quality problem effectively.
(3) The utility model discloses can be fast effectual detect out the electric energy quality problem in the distribution network to carry out pertinence electric energy quality to gained electric energy quality problem and regulate and control, improve power supply quality and power supply reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram of the system structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model discloses distribution network electric energy quality monitoring and control system, see fig. 1, including central controller, electric energy quality monitoring module, the electric energy quality regulation and control module that connects gradually, electric energy quality monitoring module with the electric energy quality regulation and control module all is connected with the distribution network. The central controller, the power quality monitoring module and the power quality regulation and control module are connected through a communication unit, and the communication unit can be a micropower wireless communication unit or a power carrier communication unit.
In a specific implementation process, at least one group of power quality monitoring modules and power quality regulation and control modules can be arranged on a power distribution network line and used for monitoring and regulating and controlling the power quality of an area to be detected of the power distribution network.
The power quality monitoring module comprises a signal acquisition unit, an analog-to-digital converter and a processor which are connected in sequence.
The signal acquisition unit comprises a three-phase current transformer, a three-phase voltage transformer, a temperature sensor and a fault recorder connected with the three-phase current transformer and the three-phase voltage transformer and is used for acquiring power load data in the power distribution network. And the signal acquisition unit is connected with a three-phase conductive cable of the power distribution network. The temperature sensor is used for monitoring the temperature of the power distribution network, can analyze the relation between the power quality and the temperature of the power distribution network in real time, and is convenient for achieving the optimal power distribution quality of the power distribution network in a follow-up mode of controlling or adjusting the temperature. The fault oscillograph is connected with the three-phase current transformer and the three-phase voltage transformer and used for receiving current and voltage data of the power distribution network, recording change signals of electric quantities before and after a fault and judging the type and the position of the fault.
The analog-to-digital converter is used for converting the collected electric load data into binary discrete signals which are identified by the processor.
The processor is used for calculating the power quality parameters of the power distribution network according to the power consumption load data and sending a control instruction to the power quality regulation and control module. The electric energy quality parameters comprise the voltage qualification rate of the power distribution network, the three-phase voltage unbalance degree, the three-phase current unbalance degree and the like.
The electric energy quality regulation and control module comprises a filtering module, a compensation module and a voltage regulation and control module; the filtering module is used for filtering the voltage; the compensation module is used for performing reactive power compensation; the voltage regulation and control module is used for regulating voltage.
In a specific implementation process, the filtering module can select an active power filter, and the active power filter is connected to a power distribution network and can perform harmonic suppression and reactive compensation on the power distribution network. The active power filter is in communication with the processor, and its operation is controlled by the processor. In the power supply process of the power distribution network, the processor sends out a control instruction according to the obtained power quality parameters to control the active power filter to work, so that harmonic pollution caused by nonlinear loads in the power distribution network can be inhibited, and the power quality of the power distribution network is improved.
In a specific implementation process, the compensation module may select a reactive power compensator, and the reactive power compensator may be a static reactive power compensator or a dynamic reactive power compensator. Wherein, the static var compensator can be a high-voltage static var compensator; the dynamic reactive compensator may be a dynamic reactive compensation device. The reactive power compensator is electrically connected to the power distribution network, and can perform reactive power compensation on the power distribution network. The reactive power compensator is in communication with the processor, and its operation is controlled by the processor. In the power supply process of the power distribution network, the processor sends a control instruction according to the obtained power quality parameters, and controls the reactive power compensator to work, so that reactive power compensation can be carried out on the power distribution network, the power supply efficiency is further improved, and the power quality of the power distribution network is improved.
In a specific implementation process, the voltage regulation and control module mainly regulates and improves the voltage through an uninterruptible power supply and a dynamic voltage regulator.
In other embodiments, the system further comprises a display and an alarm, which are respectively connected with the central controller; the display is used for displaying the signals acquired by the power quality monitoring module, the fault diagnosis result, the power quality parameters obtained by the processing of the processor, the power quality regulation and control result and the like; when the power quality parameter in the power quality monitoring module exceeds a preset threshold value or a fault occurs, the central controller sends out an alarm instruction, and the alarm gives an alarm.
In other embodiments, the system further comprises a memory, which is connected with the central controller (not shown in fig. 1) and is used for storing data such as signals collected by the power quality monitoring module and power quality parameters processed by the processor.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A power quality monitoring and control system of a power distribution network is characterized by comprising a central controller, a power quality monitoring module and a power quality regulation and control module which are sequentially connected, wherein the power quality monitoring module and the power quality regulation and control module are both connected with the power distribution network;
the electric energy quality monitoring module comprises a signal acquisition unit, an analog-to-digital converter and a processor which are connected in sequence; the signal acquisition unit is used for acquiring power load data in the power distribution network; the analog-to-digital converter is used for converting the acquired electric load data into binary discrete signals which are identified by the processor; the processor is used for calculating the power quality parameters of the power distribution network according to the power load data and sending a control instruction to the power quality regulation and control module;
the electric energy quality regulation and control module comprises a filtering module, a compensation module and a voltage regulation and control module; the filtering module is used for filtering the voltage; the compensation module is used for performing reactive power compensation; the voltage regulation and control module is used for regulating voltage.
2. The power quality monitoring and control system of the power distribution network according to claim 1, wherein the central controller, the power quality monitoring module and the power quality control module are connected through a communication unit, and the communication unit is a micro-power wireless communication unit or a power carrier communication unit.
3. The power quality monitoring and control system of the power distribution network according to claim 1, wherein the signal acquisition unit comprises a three-phase current transformer, a three-phase voltage transformer, a temperature sensor and a fault recorder connected with the three-phase current transformer and the three-phase voltage transformer.
4. The power quality monitoring and control system for the power distribution network of claim 1, wherein the signal acquisition unit is connected to a three-phase conductive cable of the power distribution network.
5. The power quality monitoring and control system for the power distribution network of claim 1, wherein the filtering module is an active power filter.
6. The power quality monitoring and control system of the power distribution network of claim 1, wherein the compensation module is a reactive compensator.
7. The power quality monitoring and control system for the power distribution network of claim 1, wherein the voltage regulation module is a dynamic voltage regulator.
8. The power quality monitoring and control system of the power distribution network according to claim 1, further comprising a display and an alarm, each connected to the central controller; the display is used for displaying the signals collected by the power quality monitoring module and the power quality parameters obtained by the processing of the processor; the alarm is used for giving an alarm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222808585.2U CN218243113U (en) | 2022-10-25 | 2022-10-25 | Power quality monitoring and control system for power distribution network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222808585.2U CN218243113U (en) | 2022-10-25 | 2022-10-25 | Power quality monitoring and control system for power distribution network |
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| CN218243113U true CN218243113U (en) | 2023-01-06 |
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| CN202222808585.2U Active CN218243113U (en) | 2022-10-25 | 2022-10-25 | Power quality monitoring and control system for power distribution network |
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- 2022-10-25 CN CN202222808585.2U patent/CN218243113U/en active Active
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