CN216599015U - Distributed electric energy quality compensation system - Google Patents

Distributed electric energy quality compensation system Download PDF

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Publication number
CN216599015U
CN216599015U CN202122650514.XU CN202122650514U CN216599015U CN 216599015 U CN216599015 U CN 216599015U CN 202122650514 U CN202122650514 U CN 202122650514U CN 216599015 U CN216599015 U CN 216599015U
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power
module
management module
voltage
power management
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张海锋
马丽山
王生宏
张利春
温志恒
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Guoluo Power Supply Co Of Qinghai Electric Power Co
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Guoluo Power Supply Co Of Qinghai Electric Power Co
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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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/10—Flexible AC transmission systems [FACTS]
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • 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
    • Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
    • 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
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses

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Abstract

The utility model relates to the technical field of distribution lines, in particular to a distributed power quality compensation system, which comprises: the system comprises a power distribution network circuit, a power management module, an SVG compensation device, a combination switch and a double-port RAM data line; the power distribution network line is respectively connected with a power management module and an SVG compensation device; the SVG compensation device is connected with a load; the compound switch is connected to the load circuit in parallel and is connected with a voltage regulating device for regulating voltage of the load circuit; the one end of two port RAM data lines is connected with the power management module other end and is connected with SVG compensation arrangement and blend switch, and power management module still is connected with backstage monitor terminal, backstage monitor terminal and power management module communication connection. According to the utility model, the voltage boost level of the voltage regulating device in the line is greatly improved.

Description

Distributed electric energy quality compensation system
Technical Field
The utility model relates to the technical field of distribution lines, in particular to a distributed power quality compensation system.
Background
The reactive current of the segmented line needs to be compensated in the power distribution network line sometimes, at present, due to the fact that loads in different regions are different, for example, 10kV lines in some regions are high in power factor and small in reactive current, a traditional SVG compensation device for example is adopted and cannot be put into use, when the line current is large, only a voltage adjusting device is adopted, the effect of increasing the number of the lines cannot be improved in proportion, and therefore the utilization rate of a voltage improving device can be reduced.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a distributed power quality compensation system to solve the above problems in the prior art.
In order to achieve the purpose, the utility model provides the following technical scheme:
a distributed power quality compensation system comprising: the system comprises a power distribution network line 3, a power management module 2, an SVG compensation device 1, a combination switch 4 and a double-port RAM data line 5; the power distribution network line 3 is respectively connected with a power management module 2 and an SVG compensation device 1; the SVG compensation device 1 is connected with a load; the compound switch 4 is connected to a load circuit in parallel and is connected with a voltage regulating device 7 for regulating voltage of the load circuit; one end of the double-port RAM data line 5 is connected with the power management module 2, the other end of the double-port RAM data line is connected with the SVG compensation device 1 and the compound switch 4, the power management module 2 is further connected with the background monitoring terminal 6, and the background monitoring terminal 6 is in communication connection with the power management module 2.
Further, the power management module 2 includes: the system comprises a current sensor, a voltage sensor, a main control unit 20, a communication module, a GPS time synchronization module 24 and a power supply module 26; the communication module, the GPS time setting module 24 and the power supply module 26 are respectively connected with the main control unit 20; one end of the current sensor and one end of the voltage sensor are connected with the distribution line 3, and the other end of the current sensor and the other end of the voltage sensor are connected with the main control unit 20.
Further, the current sensor adopts a PCB type Rogowski coil current sensor 21, and the voltage sensor adopts a space capacitance voltage division sensor 22.
Further, the communication module comprises a ZigBee alternate communication module 23 and a GPRS module 25, the ZigBee alternate communication module 23 is connected with the main control unit 20, one end of the GPRS module 25 is connected with the background monitoring terminal 6, and the other end of the GPRS module is connected with the main control unit 20.
Further, the power supply module 26 supplies power to the system by combining the inductive power taking of the current transformer and the provision of a lithium battery as a backup power source.
The power management module is used for acquiring parameter information of the power distribution network line;
the SVG compensation device is used for detecting the power factor of a power distribution network line, and the output of the SVG compensation device is connected to a load;
the double-port RAM data line is used for realizing communication between the power management module and the combination switch and the SVG compensation device respectively;
the power supply management module is used for controlling the compound switch to realize the on-off state between the voltage regulating device and a load circuit according to the parameter information and the power factor;
the parameter information includes the line current and the line voltage.
The current sensor is used for acquiring the current value of the power distribution network line;
and the voltage sensor is used for acquiring the voltage value of the power distribution network line.
The GPS time synchronization module is used for system time synchronization and positioning;
the communication module comprises a ZigBee inter-phase communication module and a GPRS module, wherein the ZigBee inter-phase communication module is used for realizing data interaction between three-phase terminals, and the GPRS module is used for transmitting data to a background monitoring terminal so as to be responsible for data exchange between the platform monitoring terminal and the installation node.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the power management module is matched with the existing SVG compensation device and the compound switch to form an electric energy quality compensation system which is used for distributed installation in a power distribution network line and sectionally compensating the reactive current of the line on site. According to actual need, this system of suitable position installation is as electric energy quality compensator in the distribution network circuit, operation control is by background monitor terminal unified control, SVG compensation arrangement detects, for example work according to the line current when power factor is great, compensate according to power factor when power factor is less, main control unit is according to SVG compensation arrangement testing result, through the switch-on of two port RAM data line control blend switch, make voltage regulation apparatus incorporate into load circuit work, the voltage boost level when will promote voltage regulation apparatus by a wide margin.
Drawings
Fig. 1 is a schematic diagram of the principle of the present invention.
In the figure: the system comprises a 1-SVG compensation device, a 2-power management module, a 20-main control unit, a 21-PCB Rogowski coil current sensor, a 22-space capacitance voltage division sensor, a 23-ZigBee phase communication module, a 24-GPS time synchronization module, a 25-GPRS module, a 26-power supply module, a 3-power distribution network circuit, a 4-compound switch, a 5-double-port RAM data line, a 6-background monitoring terminal, a 7-voltage regulation device and an 8-load.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A distributed power quality compensation system comprising: the system comprises a power distribution network line 3, a power management module 2, an SVG compensation device 1, a combination switch 4 and a double-port RAM data line 5; the power distribution network line 3 is respectively connected with a power management module 2 and an SVG compensation device 1; the SVG compensation device 1 is connected with a load; the combination switch 4 is connected to a load circuit in parallel and is connected with a voltage regulating device 7 for regulating voltage of the load circuit; one end of the double-port RAM data line 5 is connected with the power management module 2, the other end of the double-port RAM data line is connected with the SVG compensation device 1 and the compound switch 4, the power management module 2 is further connected with the background monitoring terminal 6, and the background monitoring terminal 6 is in communication connection with the power management module 2.
The power management module 2 includes:
the current sensor is connected with the main control unit 20 and is used for acquiring the current value of the power distribution network line 3;
and the voltage sensor is connected with the main control unit 20 and is used for acquiring the voltage value of the power distribution network line 3.
Example 2
As shown in fig. 1, a distributed power quality compensation system includes: the system comprises a power distribution network line 3, a power management module 2, an SVG compensation device 1, a combination switch 4 and a double-port RAM data line 5; the power distribution network line 3 is respectively connected with a power management module 2 and an SVG compensation device 1; the SVG compensation device 1 is connected with a load; the combination switch 4 is connected to a load circuit in parallel and is connected with a voltage regulating device 7 for regulating voltage of the load circuit; one end of the double-port RAM data line 5 is connected with the power management module 2, the other end of the double-port RAM data line is connected with the SVG compensation device 1 and the compound switch 4, the power management module 2 is further connected with the background monitoring terminal 6, and the background monitoring terminal 6 is in communication connection with the power management module 2.
The power management module 2 includes: the system comprises a current sensor, a voltage sensor, a main control unit 20, a communication module, a GPS time synchronization module 24 and a power supply module 26; the communication module, the GPS time setting module 24 and the power supply module 26 are respectively connected with the main control unit 20; one end of the current sensor and one end of the voltage sensor are connected with the distribution line 3, and the other end of the current sensor and the other end of the voltage sensor are connected with the main control unit 20.
Further, the current sensor adopts a PCB type Rogowski coil current sensor 21, and the voltage sensor adopts a space capacitance voltage division sensor 22.
Further, the communication module comprises a ZigBee alternate communication module 23 and a GPRS module 25, the ZigBee alternate communication module 23 is connected with the main control unit 20, one end of the GPRS module 25 is connected with the background monitoring terminal 6, and the other end of the GPRS module is connected with the main control unit 20.
In the utility model, in order to solve the problems that the traditional SVG compensation device can not be put into use in certain areas due to very high line power factor and very small reactive current and the utilization rate of a voltage boosting device can be reduced only by increasing the number of voltage regulating devices when the line current is very large, according to the line load distribution and line parameters, a power management module is adopted to cooperate with the existing SVG compensation device, a compound switch and the like to jointly form an electric energy quality compensation system which is used for distributed installation in a distribution network line and sectionally compensating the line reactive current on site. According to the actual requirement, the system is installed at a proper position in a power distribution network line to be used as an electric energy quality compensator, the operation control is uniformly controlled by a background monitoring terminal 6, the SVG compensation device detects, for example, when the power factor is large, the system works according to the line current, when the power factor is small, the system compensates according to the power factor,
the method comprises the following steps: the main control unit 20 controls the on/off of the combination switch 4 through the dual-port RAM data line 4 according to the detection result of the SVG compensation device, so that the voltage regulation device 7 is incorporated into a load line to work, and the voltage boost level when a small amount of voltage regulation devices 7 are greatly boosted. Therefore, the system has the function of regulating the line current in the traditional sense and is an important device for voltage regulation. The capacitance compensation device can be a power electronic device and a traditional capacitance compensation device.
In the utility model, voltage and current sensors respectively collect wire voltage and current, a master control communication module realizes the synchronous collection, storage and transmission functions of voltage and current signals, particularly, phasor measurement, synchronous sampling and remote communication can be realized, the master control communication module is used on a power distribution network line, each group of power management modules consists of three-phase terminals, wherein, A phase is a coordinator, data interaction is realized between the three-phase terminals through ZigBee, the coordinator and a background communicate through GPRS/CDMA/3G, and each module realizes distributed synchronous sampling through GPS/Beidou. The current sensor preferably adopts a PCB type Rogowski coil current sensor 21, has the advantages of low cost, high measurement precision, light weight, flexible wiring mode and the like, and can solve the problems of magnetic field interference in the vertical direction, open type structure and the like. The voltage sensor is preferably a space capacitance voltage division sensor 22, a stable voltage division ratio can be obtained, and the line voltage can be calculated by measuring the voltage on the voltage division capacitor. The communication module mainly comprises interphase short-distance communication and long-distance communication, the A phase is used as a coordinator, each phase of data is collected to the A phase by the ZigBee module, and then the GPRS module arranged on the A phase packs and transmits the data to the master station. The ZigBee phase-to-phase communication module is mainly responsible for transmitting BC two-phase data to A phase, the remote communication module arranged on the A phase transmits the data to the background monitoring terminal 6 through a global system for mobile communications (GSM) network by using GPRS, and the ZigBee phase-to-phase communication module is mainly responsible for data exchange between the background monitoring terminal 6 and the installation node. The combination of inter-phase communication and long-distance communication can meet the requirements of system cost and power consumption.
In the utility model, a power supply module mainly acquires energy from a power distribution network line to supply power to a device, and the line current is converted into power and output by mainly utilizing the principle of a current transformer. The energy-taking magnetic core of the current transformer is sleeved on a circuit, and is rectified and filtered after passing through a power control and overvoltage protection module, and then is transmitted to a 1 st-level DC/DC converter to be converted into 5V output. Under the control of the power supply management module, the 5V output can be converted into 3.3V output by the 2 nd-stage DC/DC converter to be supplied to a load. When the energy is sufficient, the 5V output can be used as a backup power supply for charging the lithium battery through the charging management module.
In the utility model, the main control unit 20 of the power management module 2, the SVG compensation device 1 and the combination switch 4 are communicated by using a double-port RAM data line as a buffer, thereby realizing data interaction. SVG compensation arrangement 1 can adopt current mixed type SVG reactive power compensation arrangement or 10kV direct-hanging SVG reactive power compensation arrangement etc. compound switch that compound switch 4 can adopt current three-phase to mend altogether, like the compound switch that is based on singlechip PIC16C61 and is applied to low pressure capacitance reactive compensation etc..
Generally speaking, according to actual need, this system of suitable position installation is as the power quality compensator in distribution network line 3, operation control is by backstage monitor terminal 6 unified control, detect according to SVG compensation arrangement, for example, work according to the line current when power factor is great, compensate according to power factor when power factor is less, main control unit 20 is according to SVG compensation arrangement detection result, through 4 control blend switch switchings of two port RAM data line 4, make voltage regulation apparatus 7 incorporate into load circuit work, the voltage boost level when will promote voltage regulation apparatus 7 in the circuit by a wide margin.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A distributed power quality compensation system is characterized by comprising a power distribution network circuit, a power management module, an SVG compensation device, a combination switch and a double-port RAM data line; the power distribution network line is respectively connected with a power management module and an SVG compensation device; the SVG compensation device is connected with a load; the compound switch is connected to the load circuit in parallel and is connected with a voltage regulating device for regulating voltage of the load circuit; the one end of two port RAM data lines is connected with the power management module other end and is connected with SVG compensation arrangement and blend switch, and power management module still is connected with backstage monitor terminal, backstage monitor terminal and power management module communication connection.
2. The distributed power quality compensation system of claim 1, wherein the power management module comprises: the device comprises a current sensor, a voltage sensor, a main control unit (20), a communication module, a GPS time synchronization module (24) and a power supply module (26); the communication module, the GPS time setting module (24) and the power supply module (26) are respectively connected with the main control unit (20); one end of the current sensor and one end of the voltage sensor are connected with the distribution line, and the other end of the current sensor and the other end of the voltage sensor are connected with the main control unit (20).
3. The distributed power quality compensation system of claim 2, wherein the current sensor is a PCB type rogowski coil current sensor (21) and the voltage sensor is a space capacitance voltage division sensor (22).
4. The distributed power quality compensation system according to claim 2, wherein the communication module comprises a ZigBee interphase communication module (23) and a GPRS module (25), the ZigBee interphase communication module (23) is connected with the main control unit (20), one end of the GPRS module (25) is connected with the background monitoring terminal, and the other end of the GPRS module is connected with the main control unit (20).
5. The distributed power quality compensation system of claim 4, wherein the power supply module (26) supplies power to the system by using a combination of inductive power taking by a current transformer and a lithium battery as a backup power source.
CN202122650514.XU 2021-11-01 2021-11-01 Distributed electric energy quality compensation system Active CN216599015U (en)

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Application Number Priority Date Filing Date Title
CN202122650514.XU CN216599015U (en) 2021-11-01 2021-11-01 Distributed electric energy quality compensation system

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Application Number Priority Date Filing Date Title
CN202122650514.XU CN216599015U (en) 2021-11-01 2021-11-01 Distributed electric energy quality compensation system

Publications (1)

Publication Number Publication Date
CN216599015U true CN216599015U (en) 2022-05-24

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